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CbcModel.cpp @ 1791

Last change on this file since 1791 was 1791, checked in by stefan, 9 years ago
merge r1790 from stable/2.7 (correct message if iterlim reached) and introduce secondaryStatus 8 for stop at iteration limit
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 663.4 KB

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1	/* $Id: CbcModel.cpp 1791 2012-06-08 15:15:10Z stefan $ */
2	// Copyright (C) 2002, International Business Machines
3	// Corporation and others. All Rights Reserved.
4	// This code is licensed under the terms of the Eclipse Public License (EPL).
5
6	#if defined(_MSC_VER)
7	// Turn off compiler warning about long names
8	# pragma warning(disable:4786)
9	#endif
10
11	#include "CbcConfig.h"
12
13	#include <string>
14	//#define CBC_DEBUG 1
15	//#define CHECK_CUT_COUNTS
16	//#define CHECK_NODE
17	//#define CHECK_NODE_FULL
18	//#define NODE_LOG
19	//#define GLOBAL_CUTS_JUST_POINTERS
20	#ifdef CGL_DEBUG_GOMORY
21	extern int gomory_try;
22	#endif
23	#include <cassert>
24	#include <cmath>
25	#include <cfloat>
26
27	#ifdef COIN_HAS_CLP
28	// include Presolve from Clp
29	#include "ClpPresolve.hpp"
30	#include "OsiClpSolverInterface.hpp"
31	#include "ClpNode.hpp"
32	#include "ClpDualRowDantzig.hpp"
33	#include "ClpSimplexPrimal.hpp"
34	#endif
35
36	#include "CbcEventHandler.hpp"
37
38	#include "OsiSolverInterface.hpp"
39	#include "OsiAuxInfo.hpp"
40	#include "OsiSolverBranch.hpp"
41	#include "OsiChooseVariable.hpp"
42	#include "CoinWarmStartBasis.hpp"
43	#include "CoinPackedMatrix.hpp"
44	#include "CoinHelperFunctions.hpp"
45	#include "CbcBranchActual.hpp"
46	#include "CbcBranchDynamic.hpp"
47	#include "CbcHeuristic.hpp"
48	#include "CbcHeuristicFPump.hpp"
49	#include "CbcHeuristicRINS.hpp"
50	#include "CbcHeuristicDive.hpp"
51	#include "CbcModel.hpp"
52	#include "CbcTreeLocal.hpp"
53	#include "CbcStatistics.hpp"
54	#include "CbcStrategy.hpp"
55	#include "CbcMessage.hpp"
56	#include "OsiRowCut.hpp"
57	#include "OsiColCut.hpp"
58	#include "OsiRowCutDebugger.hpp"
59	#include "OsiCuts.hpp"
60	#include "CbcCountRowCut.hpp"
61	#include "CbcCutGenerator.hpp"
62	#include "CbcFeasibilityBase.hpp"
63	#include "CbcFathom.hpp"
64	// include Probing
65	#include "CglProbing.hpp"
66	#include "CglGomory.hpp"
67	#include "CglTwomir.hpp"
68	// include preprocessing
69	#include "CglPreProcess.hpp"
70	#include "CglDuplicateRow.hpp"
71	#include "CglStored.hpp"
72	#include "CglClique.hpp"
73
74	#include "CoinTime.hpp"
75	#include "CoinMpsIO.hpp"
76
77	#include "CbcCompareActual.hpp"
78	#include "CbcTree.hpp"
79	// This may be dummy
80	#include "CbcThread.hpp"
81	/* Various functions local to CbcModel.cpp */
82
83	namespace {
84
85	//-------------------------------------------------------------------
86	// Returns the greatest common denominator of two
87	// positive integers, a and b, found using Euclid's algorithm
88	//-------------------------------------------------------------------
89	static int gcd(int a, int b)
90	{
91	int remainder = -1;
92	// make sure a<=b (will always remain so)
93	if (a > b) {
94	// Swap a and b
95	int temp = a;
96	a = b;
97	b = temp;
98	}
99	// if zero then gcd is nonzero (zero may occur in rhs of packed)
100	if (!a) {
101	if (b) {
102	return b;
103	} else {
104	printf("**** gcd given two zeros!!\n");
105	abort();
106	}
107	}
108	while (remainder) {
109	remainder = b % a;
110	b = a;
111	a = remainder;
112	}
113	return b;
114	}
115
116
117
118	#ifdef CHECK_NODE_FULL
119
120	/*
121	Routine to verify that tree linkage is correct. The invariant that is tested
122	is
123
124	reference count = (number of actual references) + (number of branches left)
125
126	The routine builds a set of paired arrays, info and count, by traversing the
127	tree. Each CbcNodeInfo is recorded in info, and the number of times it is
128	referenced (via the parent field) is recorded in count. Then a final check is
129	made to see if the numberPointingToThis_ field agrees.
130	*/
131
132	void verifyTreeNodes (const CbcTree * branchingTree, const CbcModel &model)
133
134	{
135	if (model.getNodeCount() == 661) return;
136	printf("*** CHECKING tree after %d nodes\n", model.getNodeCount()) ;
137
138	int j ;
139	int nNodes = branchingTree->size() ;
140	# define MAXINFO 1000
141	int *count = new int [MAXINFO] ;
142	CbcNodeInfo *info = new CbcNodeInfo[MAXINFO] ;
143	int nInfo = 0 ;
144	/*
145	Collect all CbcNodeInfo objects in info, by starting from each live node and
146	traversing back to the root. Nodes in the live set should have unexplored
147	branches remaining.
148
149	TODO: The `while (nodeInfo)' loop could be made to break on reaching a
150	common ancester (nodeInfo is found in info[k]). Alternatively, the
151	check could change to signal an error if nodeInfo is not found above a
152	common ancestor.
153	*/
154	for (j = 0 ; j < nNodes ; j++) {
155	CbcNode *node = branchingTree->nodePointer(j) ;
156	if (!node)
157	continue;
158	CbcNodeInfo *nodeInfo = node->nodeInfo() ;
159	int change = node->nodeInfo()->numberBranchesLeft() ;
160	assert(change) ;
161	while (nodeInfo) {
162	int k ;
163	for (k = 0 ; k < nInfo ; k++) {
164	if (nodeInfo == info[k]) break ;
165	}
166	if (k == nInfo) {
167	assert(nInfo < MAXINFO) ;
168	nInfo++ ;
169	info[k] = nodeInfo ;
170	count[k] = 0 ;
171	}
172	nodeInfo = nodeInfo->parent() ;
173	}
174	}
175	/*
176	Walk the info array. For each nodeInfo, look up its parent in info and
177	increment the corresponding count.
178	*/
179	for (j = 0 ; j < nInfo ; j++) {
180	CbcNodeInfo *nodeInfo = info[j] ;
181	nodeInfo = nodeInfo->parent() ;
182	if (nodeInfo) {
183	int k ;
184	for (k = 0 ; k < nInfo ; k++) {
185	if (nodeInfo == info[k]) break ;
186	}
187	assert (k < nInfo) ;
188	count[k]++ ;
189	}
190	}
191	/*
192	Walk the info array one more time and check that the invariant holds. The
193	number of references (numberPointingToThis()) should equal the sum of the
194	number of actual references (held in count[]) plus the number of potential
195	references (unexplored branches, numberBranchesLeft()).
196	*/
197	for (j = 0; j < nInfo; j++) {
198	CbcNodeInfo * nodeInfo = info[j] ;
199	if (nodeInfo) {
200	int k ;
201	for (k = 0; k < nInfo; k++)
202	if (nodeInfo == info[k])
203	break ;
204	printf("Nodeinfo %x - %d left, %d count\n",
205	nodeInfo,
206	nodeInfo->numberBranchesLeft(),
207	nodeInfo->numberPointingToThis()) ;
208	assert(nodeInfo->numberPointingToThis() ==
209	count[k] + nodeInfo->numberBranchesLeft()) ;
210	}
211	}
212
213	delete [] count ;
214	delete [] info ;
215
216	return ;
217	}
218
219	#endif /* CHECK_NODE_FULL */
220
221
222
223	#ifdef CHECK_CUT_COUNTS
224
225	/*
226	Routine to verify that cut reference counts are correct.
227	*/
228	void verifyCutCounts (const CbcTree * branchingTree, CbcModel &model)
229
230	{
231	printf("*** CHECKING cuts after %d nodes\n", model.getNodeCount()) ;
232
233	int j ;
234	int nNodes = branchingTree->size() ;
235
236	/*
237	cut.tempNumber_ exists for the purpose of doing this verification. Clear it
238	in all cuts. We traverse the tree by starting from each live node and working
239	back to the root. At each CbcNodeInfo, check for cuts.
240	*/
241	for (j = 0 ; j < nNodes ; j++) {
242	CbcNode *node = branchingTree->nodePointer(j) ;
243	CbcNodeInfo * nodeInfo = node->nodeInfo() ;
244	assert (node->nodeInfo()->numberBranchesLeft()) ;
245	while (nodeInfo) {
246	int k ;
247	for (k = 0 ; k < nodeInfo->numberCuts() ; k++) {
248	CbcCountRowCut *cut = nodeInfo->cuts()[k] ;
249	if (cut) cut->tempNumber_ = 0;
250	}
251	nodeInfo = nodeInfo->parent() ;
252	}
253	}
254	/*
255	Walk the live set again, this time collecting the list of cuts in use at each
256	node. addCuts1 will collect the cuts in model.addedCuts_. Take into account
257	that when we recreate the basis for a node, we compress out the slack cuts.
258	*/
259	for (j = 0 ; j < nNodes ; j++) {
260	CoinWarmStartBasis *debugws = model.getEmptyBasis() ;
261	CbcNode *node = branchingTree->nodePointer(j) ;
262	CbcNodeInfo *nodeInfo = node->nodeInfo();
263	int change = node->nodeInfo()->numberBranchesLeft() ;
264	printf("Node %d %x (info %x) var %d way %d obj %g", j, node,
265	node->nodeInfo(), node->columnNumber(), node->way(),
266	node->objectiveValue()) ;
267
268	model.addCuts1(node, debugws) ;
269
270	int i ;
271	int numberRowsAtContinuous = model.numberRowsAtContinuous() ;
272	CbcCountRowCut **addedCuts = model.addedCuts() ;
273	for (i = 0 ; i < model.currentNumberCuts() ; i++) {
274	CoinWarmStartBasis::Status status =
275	debugws->getArtifStatus(i + numberRowsAtContinuous) ;
276	if (status != CoinWarmStartBasis::basic && addedCuts[i]) {
277	addedCuts[i]->tempNumber_ += change ;
278	}
279	}
280
281	while (nodeInfo) {
282	nodeInfo = nodeInfo->parent() ;
283	if (nodeInfo) printf(" -> %x", nodeInfo);
284	}
285	printf("\n") ;
286	delete debugws ;
287	}
288	/*
289	The moment of truth: We've tallied up the references by direct scan of the search tree. Check for agreement with the count in the cut.
290
291	TODO: Rewrite to check and print mismatch only when tempNumber_ == 0?
292	*/
293	for (j = 0 ; j < nNodes ; j++) {
294	CbcNode *node = branchingTree->nodePointer(j) ;
295	CbcNodeInfo *nodeInfo = node->nodeInfo();
296	while (nodeInfo) {
297	int k ;
298	for (k = 0 ; k < nodeInfo->numberCuts() ; k++) {
299	CbcCountRowCut *cut = nodeInfo->cuts()[k] ;
300	if (cut && cut->tempNumber_ >= 0) {
301	if (cut->tempNumber_ != cut->numberPointingToThis())
302	printf("mismatch %x %d %x %d %d\n", nodeInfo, k,
303	cut, cut->tempNumber_, cut->numberPointingToThis()) ;
304	else
305	printf(" match %x %d %x %d %d\n", nodeInfo, k,
306	cut, cut->tempNumber_, cut->numberPointingToThis()) ;
307	cut->tempNumber_ = -1 ;
308	}
309	}
310	nodeInfo = nodeInfo->parent() ;
311	}
312	}
313
314	return ;
315	}
316
317	#endif /* CHECK_CUT_COUNTS */
318
319
320	#ifdef CHECK_CUT_SIZE
321
322	/*
323	Routine to verify that cut reference counts are correct.
324	*/
325	void verifyCutSize (const CbcTree * branchingTree, CbcModel &model)
326	{
327
328	int j ;
329	int nNodes = branchingTree->size() ;
330	int totalCuts = 0;
331
332	/*
333	cut.tempNumber_ exists for the purpose of doing this verification. Clear it
334	in all cuts. We traverse the tree by starting from each live node and working
335	back to the root. At each CbcNodeInfo, check for cuts.
336	*/
337	for (j = 0 ; j < nNodes ; j++) {
338	CbcNode *node = branchingTree->nodePointer(j) ;
339	CbcNodeInfo * nodeInfo = node->nodeInfo() ;
340	assert (node->nodeInfo()->numberBranchesLeft()) ;
341	while (nodeInfo) {
342	totalCuts += nodeInfo->numberCuts();
343	nodeInfo = nodeInfo->parent() ;
344	}
345	}
346	printf("*** CHECKING cuts (size) after %d nodes - %d cuts\n", model.getNodeCount(), totalCuts) ;
347	return ;
348	}
349
350	#endif /* CHECK_CUT_SIZE */
351
352	}
353
354	/* End unnamed namespace for CbcModel.cpp */
355
356
357	void
358	CbcModel::analyzeObjective ()
359	/*
360	Try to find a minimum change in the objective function. The first scan
361	checks that there are no continuous variables with non-zero coefficients,
362	and grabs the largest objective coefficient associated with an unfixed
363	integer variable. The second scan attempts to scale up the objective
364	coefficients to a point where they are sufficiently close to integer that
365	we can pretend they are integer, and calculate a gcd over the coefficients
366	of interest. This will be the minimum increment for the scaled coefficients.
367	The final action is to scale the increment back for the original coefficients
368	and install it, if it's better than the existing value.
369
370	John's note: We could do better than this.
371
372	John's second note - apologies for changing s to z
373	*/
374	{
375	const double *objective = getObjCoefficients() ;
376	const double *lower = getColLower() ;
377	const double *upper = getColUpper() ;
378	/*
379	Scan continuous and integer variables to see if continuous
380	are cover or network with integral rhs.
381	*/
382	double continuousMultiplier = 1.0;
383	double * coeffMultiplier = NULL;
384	double largestObj = 0.0;
385	double smallestObj = COIN_DBL_MAX;
386	{
387	const double *rowLower = getRowLower() ;
388	const double *rowUpper = getRowUpper() ;
389	int numberRows = solver_->getNumRows() ;
390	double * rhs = new double [numberRows];
391	memset(rhs, 0, numberRows*sizeof(double));
392	int iColumn;
393	int numberColumns = solver_->getNumCols() ;
394	// Column copy of matrix
395	bool allPlusOnes = true;
396	bool allOnes = true;
397	int problemType = -1;
398	const double * element = solver_->getMatrixByCol()->getElements();
399	const int * row = solver_->getMatrixByCol()->getIndices();
400	const CoinBigIndex * columnStart = solver_->getMatrixByCol()->getVectorStarts();
401	const int * columnLength = solver_->getMatrixByCol()->getVectorLengths();
402	int numberInteger = 0;
403	int numberIntegerObj = 0;
404	int numberGeneralIntegerObj = 0;
405	int numberIntegerWeight = 0;
406	int numberContinuousObj = 0;
407	double cost = COIN_DBL_MAX;
408	for (iColumn = 0; iColumn < numberColumns; iColumn++) {
409	if (upper[iColumn] == lower[iColumn]) {
410	CoinBigIndex start = columnStart[iColumn];
411	CoinBigIndex end = start + columnLength[iColumn];
412	for (CoinBigIndex j = start; j < end; j++) {
413	int iRow = row[j];
414	rhs[iRow] += lower[iColumn] * element[j];
415	}
416	} else {
417	double objValue = objective[iColumn];
418	if (solver_->isInteger(iColumn))
419	numberInteger++;
420	if (objValue) {
421	if (!solver_->isInteger(iColumn)) {
422	numberContinuousObj++;
423	} else {
424	largestObj = CoinMax(largestObj, fabs(objValue));
425	smallestObj = CoinMin(smallestObj, fabs(objValue));
426	numberIntegerObj++;
427	if (cost == COIN_DBL_MAX)
428	cost = objValue;
429	else if (cost != objValue)
430	cost = -COIN_DBL_MAX;
431	int gap = static_cast<int> (upper[iColumn] - lower[iColumn]);
432	if (gap > 1) {
433	numberGeneralIntegerObj++;
434	numberIntegerWeight += gap;
435	}
436	}
437	}
438	}
439	}
440	int iType = 0;
441	if (!numberContinuousObj && numberIntegerObj <= 5 && numberIntegerWeight <= 100 &&
442	numberIntegerObj*3 < numberObjects_ && !parentModel_ && solver_->getNumRows() > 100)
443	iType = 3 + 4;
444	else if (!numberContinuousObj && numberIntegerObj <= 100 &&
445	numberIntegerObj*5 < numberObjects_ && numberIntegerWeight <= 100 &&
446	!parentModel_ &&
447	solver_->getNumRows() > 100 && cost != -COIN_DBL_MAX)
448	iType = 2 + 4;
449	else if (!numberContinuousObj && numberIntegerObj <= 100 &&
450	numberIntegerObj*5 < numberObjects_ &&
451	!parentModel_ &&
452	solver_->getNumRows() > 100 && cost != -COIN_DBL_MAX)
453	iType = 8;
454	int iTest = getMaximumNodes();
455	if (iTest >= 987654320 && iTest < 987654330 && numberObjects_ && !parentModel_) {
456	iType = iTest - 987654320;
457	printf("Testing %d integer variables out of %d objects (%d integer) have cost of %g - %d continuous\n",
458	numberIntegerObj, numberObjects_, numberInteger, cost, numberContinuousObj);
459	if (iType == 9)
460	exit(77);
461	if (numberContinuousObj)
462	iType = 0;
463	}
464
465	//if (!numberContinuousObj&&(numberIntegerObj<=5\|\|cost!=-COIN_DBL_MAX)&&
466	//numberIntegerObj*3<numberObjects_&&!parentModel_&&solver_->getNumRows()>100) {
467	if (iType) {
468	/*
469	A) put high priority on (if none)
470	B) create artificial objective (if clp)
471	*/
472	int iPriority = -1;
473	for (int i = 0; i < numberObjects_; i++) {
474	int k = object_[i]->priority();
475	if (iPriority == -1)
476	iPriority = k;
477	else if (iPriority != k)
478	iPriority = -2;
479	}
480	bool branchOnSatisfied = ((iType & 1) != 0);
481	bool createFake = ((iType & 2) != 0);
482	bool randomCost = ((iType & 4) != 0);
483	if (iPriority >= 0) {
484	char general[200];
485	if (cost == -COIN_DBL_MAX) {
486	sprintf(general, "%d integer variables out of %d objects (%d integer) have costs - high priority",
487	numberIntegerObj, numberObjects_, numberInteger);
488	} else if (cost == COIN_DBL_MAX) {
489	sprintf(general, "No integer variables out of %d objects (%d integer) have costs",
490	numberObjects_, numberInteger);
491	branchOnSatisfied = false;
492	} else {
493	sprintf(general, "%d integer variables out of %d objects (%d integer) have cost of %g - high priority",
494	numberIntegerObj, numberObjects_, numberInteger, cost);
495	}
496	messageHandler()->message(CBC_GENERAL,
497	messages())
498	<< general << CoinMessageEol ;
499	sprintf(general, "branch on satisfied %c create fake objective %c random cost %c",
500	branchOnSatisfied ? 'Y' : 'N',
501	createFake ? 'Y' : 'N',
502	randomCost ? 'Y' : 'N');
503	messageHandler()->message(CBC_GENERAL,
504	messages())
505	<< general << CoinMessageEol ;
506	// switch off clp type branching
507	fastNodeDepth_ = -1;
508	int highPriority = (branchOnSatisfied) ? -999 : 100;
509	for (int i = 0; i < numberObjects_; i++) {
510	CbcSimpleInteger * thisOne = dynamic_cast <CbcSimpleInteger *> (object_[i]);
511	object_[i]->setPriority(1000);
512	if (thisOne) {
513	int iColumn = thisOne->columnNumber();
514	if (objective[iColumn])
515	thisOne->setPriority(highPriority);
516	}
517	}
518	}
519	#ifdef COIN_HAS_CLP
520	OsiClpSolverInterface * clpSolver
521	= dynamic_cast<OsiClpSolverInterface *> (solver_);
522	if (clpSolver && createFake) {
523	// Create artificial objective to be used when all else fixed
524	int numberColumns = clpSolver->getNumCols();
525	double * fakeObj = new double [numberColumns];
526	// Column copy
527	const CoinPackedMatrix * matrixByCol = clpSolver->getMatrixByCol();
528	//const double * element = matrixByCol.getElements();
529	//const int * row = matrixByCol.getIndices();
530	//const CoinBigIndex * columnStart = matrixByCol.getVectorStarts();
531	const int * columnLength = matrixByCol->getVectorLengths();
532	const double * solution = clpSolver->getColSolution();
533	#ifdef JJF_ZERO
534	int nAtBound = 0;
535	for (int i = 0; i < numberColumns; i++) {
536	double lowerValue = lower[i];
537	double upperValue = upper[i];
538	if (clpSolver->isInteger(i)) {
539	double lowerValue = lower[i];
540	double upperValue = upper[i];
541	double value = solution[i];
542	if (value < lowerValue + 1.0e-6 \|\|
543	value > upperValue - 1.0e-6)
544	nAtBound++;
545	}
546	}
547	#endif
548	/*
549	Generate a random objective function for problems where the given objective
550	function is not terribly useful. (Nearly feasible, single integer variable,
551	that sort of thing.
552	*/
553	CoinDrand48(true, 1234567);
554	for (int i = 0; i < numberColumns; i++) {
555	double lowerValue = lower[i];
556	double upperValue = upper[i];
557	double value = (randomCost) ? ceil((CoinDrand48() + 0.5) * 1000)
558	: i + 1 + columnLength[i] * 1000;
559	value *= 0.001;
560	//value += columnLength[i];
561	if (lowerValue > -1.0e5 \|\| upperValue < 1.0e5) {
562	if (fabs(lowerValue) > fabs(upperValue))
563	value = - value;
564	if (clpSolver->isInteger(i)) {
565	double solValue = solution[i];
566	// Better to add in 0.5 or 1.0??
567	if (solValue < lowerValue + 1.0e-6)
568	value = fabs(value) + 0.5; //fabs(value*1.5);
569	else if (solValue > upperValue - 1.0e-6)
570	value = -fabs(value) - 0.5; //-fabs(value*1.5);
571	}
572	} else {
573	value = 0.0;
574	}
575	fakeObj[i] = value;
576	}
577	// pass to solver
578	clpSolver->setFakeObjective(fakeObj);
579	delete [] fakeObj;
580	}
581	#endif
582	} else if (largestObj < smallestObj*5.0 && !parentModel_ &&
583	!numberContinuousObj &&
584	!numberGeneralIntegerObj &&
585	numberIntegerObj*2 < numberColumns) {
586	// up priorities on costed
587	int iPriority = -1;
588	for (int i = 0; i < numberObjects_; i++) {
589	int k = object_[i]->priority();
590	if (iPriority == -1)
591	iPriority = k;
592	else if (iPriority != k)
593	iPriority = -2;
594	}
595	if (iPriority >= 100) {
596	#ifdef CLP_INVESTIGATE
597	printf("Setting variables with obj to high priority\n");
598	#endif
599	for (int i = 0; i < numberObjects_; i++) {
600	CbcSimpleInteger * obj =
601	dynamic_cast <CbcSimpleInteger *>(object_[i]) ;
602	if (obj) {
603	int iColumn = obj->columnNumber();
604	if (objective[iColumn])
605	object_[i]->setPriority(iPriority - 1);
606	}
607	}
608	}
609	}
610	int iRow;
611	for (iRow = 0; iRow < numberRows; iRow++) {
612	if (rowLower[iRow] > -1.0e20 &&
613	fabs(rowLower[iRow] - rhs[iRow] - floor(rowLower[iRow] - rhs[iRow] + 0.5)) > 1.0e-10) {
614	continuousMultiplier = 0.0;
615	break;
616	}
617	if (rowUpper[iRow] < 1.0e20 &&
618	fabs(rowUpper[iRow] - rhs[iRow] - floor(rowUpper[iRow] - rhs[iRow] + 0.5)) > 1.0e-10) {
619	continuousMultiplier = 0.0;
620	break;
621	}
622	// set rhs to limiting value
623	if (rowLower[iRow] != rowUpper[iRow]) {
624	if (rowLower[iRow] > -1.0e20) {
625	if (rowUpper[iRow] < 1.0e20) {
626	// no good
627	continuousMultiplier = 0.0;
628	break;
629	} else {
630	rhs[iRow] = rowLower[iRow] - rhs[iRow];
631	if (problemType < 0)
632	problemType = 3; // set cover
633	else if (problemType != 3)
634	problemType = 4;
635	}
636	} else {
637	rhs[iRow] = rowUpper[iRow] - rhs[iRow];
638	if (problemType < 0)
639	problemType = 1; // set partitioning <=
640	else if (problemType != 1)
641	problemType = 4;
642	}
643	} else {
644	rhs[iRow] = rowUpper[iRow] - rhs[iRow];
645	if (problemType < 0)
646	problemType = 3; // set partitioning ==
647	else if (problemType != 2)
648	problemType = 2;
649	}
650	if (fabs(rhs[iRow] - 1.0) > 1.0e-12)
651	problemType = 4;
652	}
653	if (continuousMultiplier) {
654	// 1 network, 2 cover, 4 negative cover
655	int possible = 7;
656	bool unitRhs = true;
657	// See which rows could be set cover
658	for (iColumn = 0; iColumn < numberColumns; iColumn++) {
659	if (upper[iColumn] > lower[iColumn] + 1.0e-8) {
660	CoinBigIndex start = columnStart[iColumn];
661	CoinBigIndex end = start + columnLength[iColumn];
662	for (CoinBigIndex j = start; j < end; j++) {
663	double value = element[j];
664	if (value == 1.0) {
665	} else if (value == -1.0) {
666	rhs[row[j]] = -0.5;
667	allPlusOnes = false;
668	} else {
669	rhs[row[j]] = -COIN_DBL_MAX;
670	allOnes = false;
671	}
672	}
673	}
674	}
675	for (iColumn = 0; iColumn < numberColumns; iColumn++) {
676	if (upper[iColumn] > lower[iColumn] + 1.0e-8) {
677	if (!isInteger(iColumn)) {
678	CoinBigIndex start = columnStart[iColumn];
679	CoinBigIndex end = start + columnLength[iColumn];
680	double rhsValue = 0.0;
681	// 1 all ones, -1 all -1s, 2 all +- 1, 3 no good
682	int type = 0;
683	for (CoinBigIndex j = start; j < end; j++) {
684	double value = element[j];
685	if (fabs(value) != 1.0) {
686	type = 3;
687	break;
688	} else if (value == 1.0) {
689	if (!type)
690	type = 1;
691	else if (type != 1)
692	type = 2;
693	} else {
694	if (!type)
695	type = -1;
696	else if (type != -1)
697	type = 2;
698	}
699	int iRow = row[j];
700	if (rhs[iRow] == -COIN_DBL_MAX) {
701	type = 3;
702	break;
703	} else if (rhs[iRow] == -0.5) {
704	// different values
705	unitRhs = false;
706	} else if (rhsValue) {
707	if (rhsValue != rhs[iRow])
708	unitRhs = false;
709	} else {
710	rhsValue = rhs[iRow];
711	}
712	}
713	// if no elements OK
714	if (type == 3) {
715	// no good
716	possible = 0;
717	break;
718	} else if (type == 2) {
719	if (end - start > 2) {
720	// no good
721	possible = 0;
722	break;
723	} else {
724	// only network
725	possible &= 1;
726	if (!possible)
727	break;
728	}
729	} else if (type == 1) {
730	// only cover
731	possible &= 2;
732	if (!possible)
733	break;
734	} else if (type == -1) {
735	// only negative cover
736	possible &= 4;
737	if (!possible)
738	break;
739	}
740	}
741	}
742	}
743	if ((possible == 2 \|\| possible == 4) && !unitRhs) {
744	#if COIN_DEVELOP>1
745	printf("XXXXXX Continuous all +1 but different rhs\n");
746	#endif
747	possible = 0;
748	}
749	// may be all integer
750	if (possible != 7) {
751	if (!possible)
752	continuousMultiplier = 0.0;
753	else if (possible == 1)
754	continuousMultiplier = 1.0;
755	else
756	continuousMultiplier = 0.0; // 0.5 was incorrect;
757	#if COIN_DEVELOP>1
758	if (continuousMultiplier)
759	printf("XXXXXX multiplier of %g\n", continuousMultiplier);
760	#endif
761	if (continuousMultiplier == 0.5) {
762	coeffMultiplier = new double [numberColumns];
763	bool allOne = true;
764	for (iColumn = 0; iColumn < numberColumns; iColumn++) {
765	coeffMultiplier[iColumn] = 1.0;
766	if (upper[iColumn] > lower[iColumn] + 1.0e-8) {
767	if (!isInteger(iColumn)) {
768	CoinBigIndex start = columnStart[iColumn];
769	int iRow = row[start];
770	double value = rhs[iRow];
771	assert (value >= 0.0);
772	if (value != 0.0 && value != 1.0)
773	allOne = false;
774	coeffMultiplier[iColumn] = 0.5 * value;
775	}
776	}
777	}
778	if (allOne) {
779	// back to old way
780	delete [] coeffMultiplier;
781	coeffMultiplier = NULL;
782	}
783	}
784	} else {
785	// all integer
786	problemType_ = problemType;
787	#if COIN_DEVELOP>1
788	printf("Problem type is %d\n", problemType_);
789	#endif
790	}
791	}
792
793	// But try again
794	if (continuousMultiplier < 1.0) {
795	memset(rhs, 0, numberRows*sizeof(double));
796	int * count = new int [numberRows];
797	memset(count, 0, numberRows*sizeof(int));
798	for (iColumn = 0; iColumn < numberColumns; iColumn++) {
799	CoinBigIndex start = columnStart[iColumn];
800	CoinBigIndex end = start + columnLength[iColumn];
801	if (upper[iColumn] == lower[iColumn]) {
802	for (CoinBigIndex j = start; j < end; j++) {
803	int iRow = row[j];
804	rhs[iRow] += lower[iColumn] * element[j];
805	}
806	} else if (solver_->isInteger(iColumn)) {
807	for (CoinBigIndex j = start; j < end; j++) {
808	int iRow = row[j];
809	if (fabs(element[j] - floor(element[j] + 0.5)) > 1.0e-10)
810	rhs[iRow] = COIN_DBL_MAX;
811	}
812	} else {
813	for (CoinBigIndex j = start; j < end; j++) {
814	int iRow = row[j];
815	count[iRow]++;
816	if (fabs(element[j]) != 1.0)
817	rhs[iRow] = COIN_DBL_MAX;
818	}
819	}
820	}
821	// now look at continuous
822	bool allGood = true;
823	double direction = solver_->getObjSense() ;
824	int numberObj = 0;
825	for (iColumn = 0; iColumn < numberColumns; iColumn++) {
826	if (upper[iColumn] > lower[iColumn]) {
827	double objValue = objective[iColumn] * direction;
828	if (objValue && !solver_->isInteger(iColumn)) {
829	numberObj++;
830	CoinBigIndex start = columnStart[iColumn];
831	CoinBigIndex end = start + columnLength[iColumn];
832	if (objValue > 0.0) {
833	// wants to be as low as possible
834	if (lower[iColumn] < -1.0e10 \|\| fabs(lower[iColumn] - floor(lower[iColumn] + 0.5)) > 1.0e-10) {
835	allGood = false;
836	break;
837	} else if (upper[iColumn] < 1.0e10 && fabs(upper[iColumn] - floor(upper[iColumn] + 0.5)) > 1.0e-10) {
838	allGood = false;
839	break;
840	}
841	bool singletonRow = true;
842	bool equality = false;
843	for (CoinBigIndex j = start; j < end; j++) {
844	int iRow = row[j];
845	if (count[iRow] > 1)
846	singletonRow = false;
847	else if (rowLower[iRow] == rowUpper[iRow])
848	equality = true;
849	double rhsValue = rhs[iRow];
850	double lowerValue = rowLower[iRow];
851	double upperValue = rowUpper[iRow];
852	if (rhsValue < 1.0e20) {
853	if (lowerValue > -1.0e20)
854	lowerValue -= rhsValue;
855	if (upperValue < 1.0e20)
856	upperValue -= rhsValue;
857	}
858	if (fabs(rhsValue) > 1.0e20 \|\| fabs(rhsValue - floor(rhsValue + 0.5)) > 1.0e-10
859	\|\| fabs(element[j]) != 1.0) {
860	// no good
861	allGood = false;
862	break;
863	}
864	if (element[j] > 0.0) {
865	if (lowerValue > -1.0e20 && fabs(lowerValue - floor(lowerValue + 0.5)) > 1.0e-10) {
866	// no good
867	allGood = false;
868	break;
869	}
870	} else {
871	if (upperValue < 1.0e20 && fabs(upperValue - floor(upperValue + 0.5)) > 1.0e-10) {
872	// no good
873	allGood = false;
874	break;
875	}
876	}
877	}
878	if (!singletonRow && end > start + 1 && !equality)
879	allGood = false;
880	if (!allGood)
881	break;
882	} else {
883	// wants to be as high as possible
884	if (upper[iColumn] > 1.0e10 \|\| fabs(upper[iColumn] - floor(upper[iColumn] + 0.5)) > 1.0e-10) {
885	allGood = false;
886	break;
887	} else if (lower[iColumn] > -1.0e10 && fabs(lower[iColumn] - floor(lower[iColumn] + 0.5)) > 1.0e-10) {
888	allGood = false;
889	break;
890	}
891	bool singletonRow = true;
892	bool equality = false;
893	for (CoinBigIndex j = start; j < end; j++) {
894	int iRow = row[j];
895	if (count[iRow] > 1)
896	singletonRow = false;
897	else if (rowLower[iRow] == rowUpper[iRow])
898	equality = true;
899	double rhsValue = rhs[iRow];
900	double lowerValue = rowLower[iRow];
901	double upperValue = rowUpper[iRow];
902	if (rhsValue < 1.0e20) {
903	if (lowerValue > -1.0e20)
904	lowerValue -= rhsValue;
905	if (upperValue < 1.0e20)
906	upperValue -= rhsValue;
907	}
908	if (fabs(rhsValue) > 1.0e20 \|\| fabs(rhsValue - floor(rhsValue + 0.5)) > 1.0e-10
909	\|\| fabs(element[j]) != 1.0) {
910	// no good
911	allGood = false;
912	break;
913	}
914	if (element[j] < 0.0) {
915	if (lowerValue > -1.0e20 && fabs(lowerValue - floor(lowerValue + 0.5)) > 1.0e-10) {
916	// no good
917	allGood = false;
918	break;
919	}
920	} else {
921	if (upperValue < 1.0e20 && fabs(upperValue - floor(upperValue + 0.5)) > 1.0e-10) {
922	// no good
923	allGood = false;
924	break;
925	}
926	}
927	}
928	if (!singletonRow && end > start + 1 && !equality)
929	allGood = false;
930	if (!allGood)
931	break;
932	}
933	}
934	}
935	}
936	delete [] count;
937	if (allGood) {
938	#if COIN_DEVELOP>1
939	if (numberObj)
940	printf("YYYY analysis says all continuous with costs will be integer\n");
941	#endif
942	continuousMultiplier = 1.0;
943	}
944	}
945	delete [] rhs;
946	}
947	/*
948	Take a first scan to see if there are unfixed continuous variables in the
949	objective. If so, the minimum objective change could be arbitrarily small.
950	Also pick off the maximum coefficient of an unfixed integer variable.
951
952	If the objective is found to contain only integer variables, set the
953	fathoming discipline to strict.
954	*/
955	double maximumCost = 0.0 ;
956	//double trueIncrement=0.0;
957	int iColumn ;
958	int numberColumns = getNumCols() ;
959	double scaleFactor = 1.0; // due to rhs etc
960	/*
961	Original model did not have integer bounds.
962	*/
963	if ((specialOptions_&65536) == 0) {
964	/* be on safe side (later look carefully as may be able to
965	to get 0.5 say if bounds are multiples of 0.5 */
966	for (iColumn = 0 ; iColumn < numberColumns ; iColumn++) {
967	if (upper[iColumn] > lower[iColumn] + 1.0e-8) {
968	double value;
969	value = fabs(lower[iColumn]);
970	if (floor(value + 0.5) != value) {
971	scaleFactor = CoinMin(scaleFactor, 0.5);
972	if (floor(2.0value + 0.5) != 2.0value) {
973	scaleFactor = CoinMin(scaleFactor, 0.25);
974	if (floor(4.0value + 0.5) != 4.0value) {
975	scaleFactor = 0.0;
976	}
977	}
978	}
979	value = fabs(upper[iColumn]);
980	if (floor(value + 0.5) != value) {
981	scaleFactor = CoinMin(scaleFactor, 0.5);
982	if (floor(2.0value + 0.5) != 2.0value) {
983	scaleFactor = CoinMin(scaleFactor, 0.25);
984	if (floor(4.0value + 0.5) != 4.0value) {
985	scaleFactor = 0.0;
986	}
987	}
988	}
989	}
990	}
991	}
992	bool possibleMultiple = continuousMultiplier != 0.0 && scaleFactor != 0.0 ;
993	if (possibleMultiple) {
994	for (iColumn = 0 ; iColumn < numberColumns ; iColumn++) {
995	if (upper[iColumn] > lower[iColumn] + 1.0e-8) {
996	maximumCost = CoinMax(maximumCost, fabs(objective[iColumn])) ;
997	}
998	}
999	}
1000	setIntParam(CbcModel::CbcFathomDiscipline, possibleMultiple) ;
1001	/*
1002	If a nontrivial increment is possible, try and figure it out. We're looking
1003	for gcd(c<j>) for all c<j> that are coefficients of unfixed integer
1004	variables. Since the c<j> might not be integers, try and inflate them
1005	sufficiently that they look like integers (and we'll deflate the gcd
1006	later).
1007
1008	2520.0 is used as it is a nice multiple of 2,3,5,7
1009	*/
1010	if (possibleMultiple && maximumCost) {
1011	int increment = 0 ;
1012	double multiplier = 2520.0 ;
1013	while (10.0multipliermaximumCost < 1.0e8)
1014	multiplier *= 10.0 ;
1015	int bigIntegers = 0; // Count of large costs which are integer
1016	for (iColumn = 0 ; iColumn < numberColumns ; iColumn++) {
1017	if (upper[iColumn] > lower[iColumn] + 1.0e-8) {
1018	double objValue = fabs(objective[iColumn]);
1019	if (!isInteger(iColumn)) {
1020	if (!coeffMultiplier)
1021	objValue *= continuousMultiplier;
1022	else
1023	objValue *= coeffMultiplier[iColumn];
1024	}
1025	if (objValue) {
1026	double value = objValue * multiplier ;
1027	if (value < 2.1e9) {
1028	int nearest = static_cast<int> (floor(value + 0.5)) ;
1029	if (fabs(value - floor(value + 0.5)) > 1.0e-8) {
1030	increment = 0 ;
1031	break ;
1032	} else if (!increment) {
1033	increment = nearest ;
1034	} else {
1035	increment = gcd(increment, nearest) ;
1036	}
1037	} else {
1038	// large value - may still be multiple of 1.0
1039	if (fabs(objValue - floor(objValue + 0.5)) > 1.0e-8) {
1040	increment = 0;
1041	break;
1042	} else {
1043	bigIntegers++;
1044	}
1045	}
1046	}
1047	}
1048	}
1049	delete [] coeffMultiplier;
1050	/*
1051	If the increment beats the current value for objective change, install it.
1052	*/
1053	if (increment) {
1054	double value = increment ;
1055	double cutoff = getDblParam(CbcModel::CbcCutoffIncrement) ;
1056	if (bigIntegers) {
1057	// allow for 1.0
1058	increment = gcd(increment, static_cast<int> (multiplier));
1059	value = increment;
1060	}
1061	value /= multiplier ;
1062	value *= scaleFactor;
1063	//trueIncrement=CoinMax(cutoff,value);;
1064	if (value*0.999 > cutoff) {
1065	messageHandler()->message(CBC_INTEGERINCREMENT,
1066	messages())
1067	<< value << CoinMessageEol ;
1068	setDblParam(CbcModel::CbcCutoffIncrement, value*0.999) ;
1069	}
1070	}
1071	}
1072
1073	return ;
1074	}
1075
1076	/*
1077	saveModel called (carved out of) BranchandBound
1078	*/
1079	void CbcModel::saveModel(OsiSolverInterface * saveSolver, double * checkCutoffForRestart, bool * feasible)
1080	{
1081	if (saveSolver && (specialOptions_&32768) != 0) {
1082	// See if worth trying reduction
1083	*checkCutoffForRestart = getCutoff();
1084	bool tryNewSearch = solverCharacteristics_->reducedCostsAccurate() &&
1085	(*checkCutoffForRestart < 1.0e20);
1086	int numberColumns = getNumCols();
1087	if (tryNewSearch) {
1088	#ifdef CLP_INVESTIGATE
1089	printf("after %d nodes, cutoff %g - looking\n",
1090	numberNodes_, getCutoff());
1091	#endif
1092	saveSolver->resolve();
1093	double direction = saveSolver->getObjSense() ;
1094	double gap = checkCutoffForRestart - saveSolver->getObjValue() direction ;
1095	double tolerance;
1096	saveSolver->getDblParam(OsiDualTolerance, tolerance) ;
1097	if (gap <= 0.0)
1098	gap = tolerance;
1099	gap += 100.0 * tolerance;
1100	double integerTolerance = getDblParam(CbcIntegerTolerance) ;
1101
1102	const double *lower = saveSolver->getColLower() ;
1103	const double *upper = saveSolver->getColUpper() ;
1104	const double *solution = saveSolver->getColSolution() ;
1105	const double *reducedCost = saveSolver->getReducedCost() ;
1106
1107	int numberFixed = 0 ;
1108	int numberFixed2 = 0;
1109	for (int i = 0 ; i < numberIntegers_ ; i++) {
1110	int iColumn = integerVariable_[i] ;
1111	double djValue = direction * reducedCost[iColumn] ;
1112	if (upper[iColumn] - lower[iColumn] > integerTolerance) {
1113	if (solution[iColumn] < lower[iColumn] + integerTolerance && djValue > gap) {
1114	saveSolver->setColUpper(iColumn, lower[iColumn]) ;
1115	numberFixed++ ;
1116	} else if (solution[iColumn] > upper[iColumn] - integerTolerance && -djValue > gap) {
1117	saveSolver->setColLower(iColumn, upper[iColumn]) ;
1118	numberFixed++ ;
1119	}
1120	} else {
1121	numberFixed2++;
1122	}
1123	}
1124	#ifdef COIN_DEVELOP
1125	/*
1126	We're debugging. (specialOptions 1)
1127	*/
1128	if ((specialOptions_&1) != 0) {
1129	const OsiRowCutDebugger *debugger = saveSolver->getRowCutDebugger() ;
1130	if (debugger) {
1131	printf("Contains optimal\n") ;
1132	OsiSolverInterface * temp = saveSolver->clone();
1133	const double * solution = debugger->optimalSolution();
1134	const double *lower = temp->getColLower() ;
1135	const double *upper = temp->getColUpper() ;
1136	int n = temp->getNumCols();
1137	for (int i = 0; i < n; i++) {
1138	if (temp->isInteger(i)) {
1139	double value = floor(solution[i] + 0.5);
1140	assert (value >= lower[i] && value <= upper[i]);
1141	temp->setColLower(i, value);
1142	temp->setColUpper(i, value);
1143	}
1144	}
1145	temp->writeMps("reduced_fix");
1146	delete temp;
1147	saveSolver->writeMps("reduced");
1148	} else {
1149	abort();
1150	}
1151	}
1152	printf("Restart could fix %d integers (%d already fixed)\n",
1153	numberFixed + numberFixed2, numberFixed2);
1154	#endif
1155	numberFixed += numberFixed2;
1156	if (numberFixed*20 < numberColumns)
1157	tryNewSearch = false;
1158	}
1159	if (tryNewSearch) {
1160	// back to solver without cuts?
1161	OsiSolverInterface * solver2 = continuousSolver_->clone();
1162	const double *lower = saveSolver->getColLower() ;
1163	const double *upper = saveSolver->getColUpper() ;
1164	for (int i = 0 ; i < numberIntegers_ ; i++) {
1165	int iColumn = integerVariable_[i] ;
1166	solver2->setColLower(iColumn, lower[iColumn]);
1167	solver2->setColUpper(iColumn, upper[iColumn]);
1168	}
1169	// swap
1170	delete saveSolver;
1171	saveSolver = solver2;
1172	double * newSolution = new double[numberColumns];
1173	double objectiveValue = *checkCutoffForRestart;
1174	CbcSerendipity heuristic(*this);
1175	if (bestSolution_)
1176	heuristic.setInputSolution(bestSolution_, bestObjective_);
1177	heuristic.setFractionSmall(0.9);
1178	heuristic.setFeasibilityPumpOptions(1008013);
1179	// Use numberNodes to say how many are original rows
1180	heuristic.setNumberNodes(continuousSolver_->getNumRows());
1181	#ifdef COIN_DEVELOP
1182	if (continuousSolver_->getNumRows() <
1183	saveSolver->getNumRows())
1184	printf("%d rows added ZZZZZ\n",
1185	solver_->getNumRows() - continuousSolver_->getNumRows());
1186	#endif
1187	int returnCode = heuristic.smallBranchAndBound(saveSolver,
1188	-1, newSolution,
1189	objectiveValue,
1190	*checkCutoffForRestart, "Reduce");
1191	if (returnCode < 0) {
1192	#ifdef COIN_DEVELOP
1193	printf("Restart - not small enough to do search after fixing\n");
1194	#endif
1195	delete [] newSolution;
1196	} else {
1197	if ((returnCode&1) != 0) {
1198	// increment number of solutions so other heuristics can test
1199	numberSolutions_++;
1200	numberHeuristicSolutions_++;
1201	lastHeuristic_ = NULL;
1202	setBestSolution(CBC_ROUNDING, objectiveValue, newSolution) ;
1203	}
1204	delete [] newSolution;
1205	*feasible = false; // stop search
1206	}
1207	#if 0 // probably not needed def CBC_THREAD
1208	if (master_) {
1209	lockThread();
1210	if (parallelMode() > 0) {
1211	while (master_->waitForThreadsInTree(0)) {
1212	lockThread();
1213	double dummyBest;
1214	tree_->cleanTree(this, -COIN_DBL_MAX, dummyBest) ;
1215	//unlockThread();
1216	}
1217	}
1218	master_->waitForThreadsInTree(2);
1219	delete master_;
1220	master_ = NULL;
1221	masterThread_ = NULL;
1222	}
1223	#endif
1224	}
1225	}
1226	}
1227	/*
1228	Adds integers, called from BranchandBound()
1229	*/
1230	void CbcModel::AddIntegers()
1231	{
1232	int numberColumns = continuousSolver_->getNumCols();
1233	int numberRows = continuousSolver_->getNumRows();
1234	int * del = new int [CoinMax(numberColumns, numberRows)];
1235	int * original = new int [numberColumns];
1236	char * possibleRow = new char [numberRows];
1237	{
1238	const CoinPackedMatrix * rowCopy = continuousSolver_->getMatrixByRow();
1239	const int * column = rowCopy->getIndices();
1240	const int * rowLength = rowCopy->getVectorLengths();
1241	const CoinBigIndex * rowStart = rowCopy->getVectorStarts();
1242	const double * rowLower = continuousSolver_->getRowLower();
1243	const double * rowUpper = continuousSolver_->getRowUpper();
1244	const double * element = rowCopy->getElements();
1245	for (int i = 0; i < numberRows; i++) {
1246	int nLeft = 0;
1247	bool possible = false;
1248	if (rowLower[i] < -1.0e20) {
1249	double value = rowUpper[i];
1250	if (fabs(value - floor(value + 0.5)) < 1.0e-8)
1251	possible = true;
1252	} else if (rowUpper[i] > 1.0e20) {
1253	double value = rowLower[i];
1254	if (fabs(value - floor(value + 0.5)) < 1.0e-8)
1255	possible = true;
1256	} else {
1257	double value = rowUpper[i];
1258	if (rowLower[i] == rowUpper[i] &&
1259	fabs(value - floor(value + 0.5)) < 1.0e-8)
1260	possible = true;
1261	}
1262	double allSame = (possible) ? 0.0 : -1.0;
1263	for (CoinBigIndex j = rowStart[i];
1264	j < rowStart[i] + rowLength[i]; j++) {
1265	int iColumn = column[j];
1266	if (continuousSolver_->isInteger(iColumn)) {
1267	if (fabs(element[j]) != 1.0)
1268	possible = false;
1269	} else {
1270	nLeft++;
1271	if (!allSame) {
1272	allSame = fabs(element[j]);
1273	} else if (allSame>0.0) {
1274	if (allSame!=fabs(element[j]))
1275	allSame = -1.0;
1276	}
1277	}
1278	}
1279	if (nLeft == rowLength[i] && allSame > 0.0)
1280	possibleRow[i] = 2;
1281	else if (possible \|\| !nLeft)
1282	possibleRow[i] = 1;
1283	else
1284	possibleRow[i] = 0;
1285	}
1286	}
1287	int nDel = 0;
1288	for (int i = 0; i < numberColumns; i++) {
1289	original[i] = i;
1290	if (continuousSolver_->isInteger(i))
1291	del[nDel++] = i;
1292	}
1293	int nExtra = 0;
1294	OsiSolverInterface * copy1 = continuousSolver_->clone();
1295	int nPass = 0;
1296	while (nDel && nPass < 10) {
1297	nPass++;
1298	OsiSolverInterface * copy2 = copy1->clone();
1299	int nLeft = 0;
1300	for (int i = 0; i < nDel; i++)
1301	original[del[i]] = -1;
1302	for (int i = 0; i < numberColumns; i++) {
1303	int kOrig = original[i];
1304	if (kOrig >= 0)
1305	original[nLeft++] = kOrig;
1306	}
1307	assert (nLeft == numberColumns - nDel);
1308	copy2->deleteCols(nDel, del);
1309	numberColumns = copy2->getNumCols();
1310	const CoinPackedMatrix * rowCopy = copy2->getMatrixByRow();
1311	numberRows = rowCopy->getNumRows();
1312	const int * column = rowCopy->getIndices();
1313	const int * rowLength = rowCopy->getVectorLengths();
1314	const CoinBigIndex * rowStart = rowCopy->getVectorStarts();
1315	const double * rowLower = copy2->getRowLower();
1316	const double * rowUpper = copy2->getRowUpper();
1317	const double * element = rowCopy->getElements();
1318	const CoinPackedMatrix * columnCopy = copy2->getMatrixByCol();
1319	const int * columnLength = columnCopy->getVectorLengths();
1320	nDel = 0;
1321	// Could do gcd stuff on ones with costs
1322	for (int i = 0; i < numberRows; i++) {
1323	if (!rowLength[i]) {
1324	del[nDel++] = i;
1325	} else if (possibleRow[i]) {
1326	if (rowLength[i] == 1) {
1327	int k = rowStart[i];
1328	int iColumn = column[k];
1329	if (!copy2->isInteger(iColumn)) {
1330	double mult = 1.0 / fabs(element[k]);
1331	if (rowLower[i] < -1.0e20) {
1332	// treat rhs as multiple of 1 unless elements all same
1333	double value = ((possibleRow[i]==2) ? rowUpper[i] : 1.0) * mult;
1334	if (fabs(value - floor(value + 0.5)) < 1.0e-8) {
1335	del[nDel++] = i;
1336	if (columnLength[iColumn] == 1) {
1337	copy2->setInteger(iColumn);
1338	int kOrig = original[iColumn];
1339	setOptionalInteger(kOrig);
1340	}
1341	}
1342	} else if (rowUpper[i] > 1.0e20) {
1343	// treat rhs as multiple of 1 unless elements all same
1344	double value = ((possibleRow[i]==2) ? rowLower[i] : 1.0) * mult;
1345	if (fabs(value - floor(value + 0.5)) < 1.0e-8) {
1346	del[nDel++] = i;
1347	if (columnLength[iColumn] == 1) {
1348	copy2->setInteger(iColumn);
1349	int kOrig = original[iColumn];
1350	setOptionalInteger(kOrig);
1351	}
1352	}
1353	} else {
1354	// treat rhs as multiple of 1 unless elements all same
1355	double value = ((possibleRow[i]==2) ? rowUpper[i] : 1.0) * mult;
1356	if (rowLower[i] == rowUpper[i] &&
1357	fabs(value - floor(value + 0.5)) < 1.0e-8) {
1358	del[nDel++] = i;
1359	copy2->setInteger(iColumn);
1360	int kOrig = original[iColumn];
1361	setOptionalInteger(kOrig);
1362	}
1363	}
1364	}
1365	} else {
1366	// only if all singletons
1367	bool possible = false;
1368	if (rowLower[i] < -1.0e20) {
1369	double value = rowUpper[i];
1370	if (fabs(value - floor(value + 0.5)) < 1.0e-8)
1371	possible = true;
1372	} else if (rowUpper[i] > 1.0e20) {
1373	double value = rowLower[i];
1374	if (fabs(value - floor(value + 0.5)) < 1.0e-8)
1375	possible = true;
1376	} else {
1377	double value = rowUpper[i];
1378	if (rowLower[i] == rowUpper[i] &&
1379	fabs(value - floor(value + 0.5)) < 1.0e-8)
1380	possible = true;
1381	}
1382	if (possible) {
1383	for (CoinBigIndex j = rowStart[i];
1384	j < rowStart[i] + rowLength[i]; j++) {
1385	int iColumn = column[j];
1386	if (columnLength[iColumn] != 1 \|\| fabs(element[j]) != 1.0) {
1387	possible = false;
1388	break;
1389	}
1390	}
1391	if (possible) {
1392	for (CoinBigIndex j = rowStart[i];
1393	j < rowStart[i] + rowLength[i]; j++) {
1394	int iColumn = column[j];
1395	if (!copy2->isInteger(iColumn)) {
1396	copy2->setInteger(iColumn);
1397	int kOrig = original[iColumn];
1398	setOptionalInteger(kOrig);
1399	}
1400	}
1401	del[nDel++] = i;
1402	}
1403	}
1404	}
1405	}
1406	}
1407	if (nDel) {
1408	copy2->deleteRows(nDel, del);
1409	// pack down possible
1410	int n=0;
1411	for (int i=0;i<nDel;i++)
1412	possibleRow[del[i]]=-1;
1413	for (int i=0;i<numberRows;i++) {
1414	if (possibleRow[i]>=0)
1415	possibleRow[n++]=possibleRow[i];
1416	}
1417	}
1418	if (nDel != numberRows) {
1419	nDel = 0;
1420	for (int i = 0; i < numberColumns; i++) {
1421	if (copy2->isInteger(i)) {
1422	del[nDel++] = i;
1423	nExtra++;
1424	}
1425	}
1426	} else {
1427	nDel = 0;
1428	}
1429	delete copy1;
1430	copy1 = copy2->clone();
1431	delete copy2;
1432	}
1433	// See if what's left is a network
1434	bool couldBeNetwork = false;
1435	if (copy1->getNumRows() && copy1->getNumCols()) {
1436	#ifdef COIN_HAS_CLP
1437	OsiClpSolverInterface * clpSolver
1438	= dynamic_cast<OsiClpSolverInterface *> (copy1);
1439	if (false && clpSolver) {
1440	numberRows = clpSolver->getNumRows();
1441	char * rotate = new char[numberRows];
1442	int n = clpSolver->getModelPtr()->findNetwork(rotate, 1.0);
1443	delete [] rotate;
1444	#ifdef CLP_INVESTIGATE
1445	printf("INTA network %d rows out of %d\n", n, numberRows);
1446	#endif
1447	if (CoinAbs(n) == numberRows) {
1448	couldBeNetwork = true;
1449	for (int i = 0; i < numberRows; i++) {
1450	if (!possibleRow[i]) {
1451	couldBeNetwork = false;
1452	#ifdef CLP_INVESTIGATE
1453	printf("but row %d is bad\n", i);
1454	#endif
1455	break;
1456	}
1457	}
1458	}
1459	} else
1460	#endif
1461	{
1462	numberColumns = copy1->getNumCols();
1463	numberRows = copy1->getNumRows();
1464	const double * rowLower = copy1->getRowLower();
1465	const double * rowUpper = copy1->getRowUpper();
1466	couldBeNetwork = true;
1467	for (int i = 0; i < numberRows; i++) {
1468	if (rowLower[i] > -1.0e20 && fabs(rowLower[i] - floor(rowLower[i] + 0.5)) > 1.0e-12) {
1469	couldBeNetwork = false;
1470	break;
1471	}
1472	if (rowUpper[i] < 1.0e20 && fabs(rowUpper[i] - floor(rowUpper[i] + 0.5)) > 1.0e-12) {
1473	couldBeNetwork = false;
1474	break;
1475	}
1476	if (possibleRow[i]==0) {
1477	couldBeNetwork = false;
1478	break;
1479	}
1480	}
1481	if (couldBeNetwork) {
1482	const CoinPackedMatrix * matrixByCol = copy1->getMatrixByCol();
1483	const double * element = matrixByCol->getElements();
1484	//const int * row = matrixByCol->getIndices();
1485	const CoinBigIndex * columnStart = matrixByCol->getVectorStarts();
1486	const int * columnLength = matrixByCol->getVectorLengths();
1487	for (int iColumn = 0; iColumn < numberColumns; iColumn++) {
1488	CoinBigIndex start = columnStart[iColumn];
1489	CoinBigIndex end = start + columnLength[iColumn];
1490	if (end > start + 2) {
1491	couldBeNetwork = false;
1492	break;
1493	}
1494	int type = 0;
1495	for (CoinBigIndex j = start; j < end; j++) {
1496	double value = element[j];
1497	if (fabs(value) != 1.0) {
1498	couldBeNetwork = false;
1499	break;
1500	} else if (value == 1.0) {
1501	if ((type&1) == 0)
1502	type \|= 1;
1503	else
1504	type = 7;
1505	} else if (value == -1.0) {
1506	if ((type&2) == 0)
1507	type \|= 2;
1508	else
1509	type = 7;
1510	}
1511	}
1512	if (type > 3) {
1513	couldBeNetwork = false;
1514	break;
1515	}
1516	}
1517	}
1518	}
1519	}
1520	if (couldBeNetwork) {
1521	for (int i = 0; i < numberColumns; i++)
1522	setOptionalInteger(original[i]);
1523	}
1524	if (nExtra \|\| couldBeNetwork) {
1525	numberColumns = copy1->getNumCols();
1526	numberRows = copy1->getNumRows();
1527	if (!numberColumns \|\| !numberRows) {
1528	int numberColumns = solver_->getNumCols();
1529	for (int i = 0; i < numberColumns; i++)
1530	assert(solver_->isInteger(i));
1531	}
1532	#ifdef CLP_INVESTIGATE
1533	if (couldBeNetwork \|\| nExtra)
1534	printf("INTA %d extra integers, %d left%s\n", nExtra,
1535	numberColumns,
1536	couldBeNetwork ? ", all network" : "");
1537	#endif
1538	findIntegers(true, 2);
1539	convertToDynamic();
1540	}
1541	#ifdef CLP_INVESTIGATE
1542	if (!couldBeNetwork && copy1->getNumCols() &&
1543	copy1->getNumRows()) {
1544	printf("INTA %d rows and %d columns remain\n",
1545	copy1->getNumRows(), copy1->getNumCols());
1546	if (copy1->getNumCols() < 200) {
1547	copy1->writeMps("moreint");
1548	printf("INTA Written remainder to moreint.mps.gz %d rows %d cols\n",
1549	copy1->getNumRows(), copy1->getNumCols());
1550	}
1551	}
1552	#endif
1553	delete copy1;
1554	delete [] del;
1555	delete [] original;
1556	delete [] possibleRow;
1557	// double check increment
1558	analyzeObjective();
1559	}
1560	/**
1561	\todo
1562	Normally, it looks like we enter here from command dispatch in the main
1563	routine, after calling the solver for an initial solution
1564	(CbcModel::initialSolve, which simply calls the solver's initialSolve
1565	routine.) The first thing we do is call resolve. Presumably there are
1566	circumstances where this is nontrivial? There's also a call from
1567	CbcModel::originalModel (tied up with integer presolve), which should be
1568	checked.
1569
1570	*/
1571
1572	/*
1573	The overall flow can be divided into three stages:
1574	* Prep: Check that the lp relaxation remains feasible at the root. If so,
1575	do all the setup for B&C.
1576	* Process the root node: Generate cuts, apply heuristics, and in general do
1577	the best we can to resolve the problem without B&C.
1578	* Do B&C search until we hit a limit or exhaust the search tree.
1579
1580	Keep in mind that in general there is no node in the search tree that
1581	corresponds to the active subproblem. The active subproblem is represented
1582	by the current state of the model, of the solver, and of the constraint
1583	system held by the solver.
1584	*/
1585	#ifdef COIN_HAS_CPX
1586	#include "OsiCpxSolverInterface.hpp"
1587	#include "cplex.h"
1588	#endif
1589	void CbcModel::branchAndBound(int doStatistics)
1590
1591	{
1592	/*
1593	Capture a time stamp before we start (unless set).
1594	*/
1595	if (!dblParam_[CbcStartSeconds]) {
1596	if (!useElapsedTime())
1597	dblParam_[CbcStartSeconds] = CoinCpuTime();
1598	else
1599	dblParam_[CbcStartSeconds] = CoinGetTimeOfDay();
1600	}
1601	dblParam_[CbcSmallestChange] = COIN_DBL_MAX;
1602	dblParam_[CbcSumChange] = 0.0;
1603	dblParam_[CbcLargestChange] = 0.0;
1604	intParam_[CbcNumberBranches] = 0;
1605	// Double check optimization directions line up
1606	dblParam_[CbcOptimizationDirection] = solver_->getObjSense();
1607	strongInfo_[0] = 0;
1608	strongInfo_[1] = 0;
1609	strongInfo_[2] = 0;
1610	strongInfo_[3] = 0;
1611	strongInfo_[4] = 0;
1612	strongInfo_[5] = 0;
1613	strongInfo_[6] = 0;
1614	numberStrongIterations_ = 0;
1615	currentNode_ = NULL;
1616	// See if should do cuts old way
1617	if (parallelMode() < 0) {
1618	specialOptions_ \|= 4096 + 8192;
1619	} else if (parallelMode() > 0) {
1620	specialOptions_ \|= 4096;
1621	}
1622	int saveMoreSpecialOptions = moreSpecialOptions_;
1623	if (dynamic_cast<CbcTreeLocal *> (tree_))
1624	specialOptions_ \|= 4096 + 8192;
1625	#ifdef COIN_HAS_CLP
1626	{
1627	OsiClpSolverInterface * clpSolver
1628	= dynamic_cast<OsiClpSolverInterface *> (solver_);
1629	if (clpSolver) {
1630	// pass in disaster handler
1631	CbcDisasterHandler handler(this);
1632	clpSolver->passInDisasterHandler(&handler);
1633	// Initialise solvers seed
1634	clpSolver->getModelPtr()->setRandomSeed(1234567);
1635	#ifdef JJF_ZERO
1636	// reduce factorization frequency
1637	int frequency = clpSolver->getModelPtr()->factorizationFrequency();
1638	clpSolver->getModelPtr()->setFactorizationFrequency(CoinMin(frequency, 120));
1639	#endif
1640	}
1641	}
1642	#endif
1643	// original solver (only set if pre-processing)
1644	OsiSolverInterface * originalSolver = NULL;
1645	int numberOriginalObjects = numberObjects_;
1646	OsiObject ** originalObject = NULL;
1647	// Save whether there were any objects
1648	bool noObjects = (numberObjects_ == 0);
1649	// Set up strategies
1650	/*
1651	See if the user has supplied a strategy object and deal with it if present.
1652	The call to setupOther will set numberStrong_ and numberBeforeTrust_, and
1653	perform integer preprocessing, if requested.
1654
1655	We need to hang on to a pointer to solver_. setupOther will assign a
1656	preprocessed solver to model, but will instruct assignSolver not to trash the
1657	existing one.
1658	*/
1659	if (strategy_) {
1660	// May do preprocessing
1661	originalSolver = solver_;
1662	strategy_->setupOther(*this);
1663	if (strategy_->preProcessState()) {
1664	// pre-processing done
1665	if (strategy_->preProcessState() < 0) {
1666	// infeasible
1667	handler_->message(CBC_INFEAS, messages_) << CoinMessageEol ;
1668	status_ = 0 ;
1669	secondaryStatus_ = 1;
1670	originalContinuousObjective_ = COIN_DBL_MAX;
1671	return ;
1672	} else if (numberObjects_ && object_) {
1673	numberOriginalObjects = numberObjects_;
1674	// redo sequence
1675	numberIntegers_ = 0;
1676	int numberColumns = getNumCols();
1677	int nOrig = originalSolver->getNumCols();
1678	CglPreProcess * process = strategy_->process();
1679	assert (process);
1680	const int * originalColumns = process->originalColumns();
1681	// allow for cliques etc
1682	nOrig = CoinMax(nOrig, originalColumns[numberColumns-1] + 1);
1683	// try and redo debugger
1684	OsiRowCutDebugger * debugger = const_cast<OsiRowCutDebugger *> (solver_->getRowCutDebuggerAlways());
1685	if (debugger)
1686	debugger->redoSolution(numberColumns, originalColumns);
1687	// User-provided solution might have been best. Synchronise.
1688	if (bestSolution_) {
1689	// need to redo - in case no better found in BAB
1690	// just get integer part right
1691	for (int i = 0; i < numberColumns; i++) {
1692	int jColumn = originalColumns[i];
1693	bestSolution_[i] = bestSolution_[jColumn];
1694	}
1695	}
1696	originalObject = object_;
1697	// object number or -1
1698	int * temp = new int[nOrig];
1699	int iColumn;
1700	for (iColumn = 0; iColumn < nOrig; iColumn++)
1701	temp[iColumn] = -1;
1702	int iObject;
1703	int nNonInt = 0;
1704	for (iObject = 0; iObject < numberOriginalObjects; iObject++) {
1705	iColumn = originalObject[iObject]->columnNumber();
1706	if (iColumn < 0) {
1707	nNonInt++;
1708	} else {
1709	temp[iColumn] = iObject;
1710	}
1711	}
1712	int numberNewIntegers = 0;
1713	int numberOldIntegers = 0;
1714	int numberOldOther = 0;
1715	for (iColumn = 0; iColumn < numberColumns; iColumn++) {
1716	int jColumn = originalColumns[iColumn];
1717	if (temp[jColumn] >= 0) {
1718	int iObject = temp[jColumn];
1719	CbcSimpleInteger * obj =
1720	dynamic_cast <CbcSimpleInteger *>(originalObject[iObject]) ;
1721	if (obj)
1722	numberOldIntegers++;
1723	else
1724	numberOldOther++;
1725	} else if (isInteger(iColumn)) {
1726	numberNewIntegers++;
1727	}
1728	}
1729	/*
1730	Allocate an array to hold the indices of the integer variables.
1731	Make a large enough array for all objects
1732	*/
1733	numberObjects_ = numberNewIntegers + numberOldIntegers + numberOldOther + nNonInt;
1734	object_ = new OsiObject * [numberObjects_];
1735	delete [] integerVariable_;
1736	integerVariable_ = new int [numberNewIntegers+numberOldIntegers];
1737	/*
1738	Walk the variables again, filling in the indices and creating objects for
1739	the integer variables. Initially, the objects hold the index and upper &
1740	lower bounds.
1741	*/
1742	numberIntegers_ = 0;
1743	int n = originalColumns[numberColumns-1] + 1;
1744	int * backward = new int[n];
1745	int i;
1746	for ( i = 0; i < n; i++)
1747	backward[i] = -1;
1748	for (i = 0; i < numberColumns; i++)
1749	backward[originalColumns[i]] = i;
1750	for (iColumn = 0; iColumn < numberColumns; iColumn++) {
1751	int jColumn = originalColumns[iColumn];
1752	if (temp[jColumn] >= 0) {
1753	int iObject = temp[jColumn];
1754	CbcSimpleInteger * obj =
1755	dynamic_cast <CbcSimpleInteger *>(originalObject[iObject]) ;
1756	if (obj) {
1757	object_[numberIntegers_] = originalObject[iObject]->clone();
1758	// redo ids etc
1759	//object_[numberIntegers_]->resetSequenceEtc(numberColumns,originalColumns);
1760	object_[numberIntegers_]->resetSequenceEtc(numberColumns, backward);
1761	integerVariable_[numberIntegers_++] = iColumn;
1762	}
1763	} else if (isInteger(iColumn)) {
1764	object_[numberIntegers_] =
1765	new CbcSimpleInteger(this, iColumn);
1766	integerVariable_[numberIntegers_++] = iColumn;
1767	}
1768	}
1769	delete [] backward;
1770	numberObjects_ = numberIntegers_;
1771	// Now append other column stuff
1772	for (iColumn = 0; iColumn < numberColumns; iColumn++) {
1773	int jColumn = originalColumns[iColumn];
1774	if (temp[jColumn] >= 0) {
1775	int iObject = temp[jColumn];
1776	CbcSimpleInteger * obj =
1777	dynamic_cast <CbcSimpleInteger *>(originalObject[iObject]) ;
1778	if (!obj) {
1779	object_[numberObjects_] = originalObject[iObject]->clone();
1780	// redo ids etc
1781	CbcObject * obj =
1782	dynamic_cast <CbcObject *>(object_[numberObjects_]) ;
1783	assert (obj);
1784	obj->redoSequenceEtc(this, numberColumns, originalColumns);
1785	numberObjects_++;
1786	}
1787	}
1788	}
1789	// now append non column stuff
1790	for (iObject = 0; iObject < numberOriginalObjects; iObject++) {
1791	iColumn = originalObject[iObject]->columnNumber();
1792	if (iColumn < 0) {
1793	// already has column numbers changed
1794	object_[numberObjects_] = originalObject[iObject]->clone();
1795	#ifdef JJF_ZERO
1796	// redo ids etc
1797	CbcObject * obj =
1798	dynamic_cast <CbcObject *>(object_[numberObjects_]) ;
1799	assert (obj);
1800	obj->redoSequenceEtc(this, numberColumns, originalColumns);
1801	#endif
1802	numberObjects_++;
1803	}
1804	}
1805	delete [] temp;
1806	if (!numberObjects_)
1807	handler_->message(CBC_NOINT, messages_) << CoinMessageEol ;
1808	} else {
1809	int numberColumns = getNumCols();
1810	CglPreProcess * process = strategy_->process();
1811	assert (process);
1812	const int * originalColumns = process->originalColumns();
1813	// try and redo debugger
1814	OsiRowCutDebugger * debugger = const_cast<OsiRowCutDebugger *> (solver_->getRowCutDebuggerAlways());
1815	if (debugger)
1816	debugger->redoSolution(numberColumns, originalColumns);
1817	}
1818	} else {
1819	//no preprocessing
1820	originalSolver = NULL;
1821	}
1822	strategy_->setupCutGenerators(*this);
1823	strategy_->setupHeuristics(*this);
1824	// Set strategy print level to models
1825	strategy_->setupPrinting(*this, handler_->logLevel());
1826	}
1827	eventHappened_ = false;
1828	CbcEventHandler *eventHandler = getEventHandler() ;
1829	if (eventHandler)
1830	eventHandler->setModel(this);
1831	#define CLIQUE_ANALYSIS
1832	#ifdef CLIQUE_ANALYSIS
1833	// set up for probing
1834	// If we're doing clever stuff with cliques, additional info here.
1835	if (!parentModel_)
1836	probingInfo_ = new CglTreeProbingInfo(solver_);
1837	else
1838	probingInfo_ = NULL;
1839	#else
1840	probingInfo_ = NULL;
1841	#endif
1842
1843	// Try for dominated columns
1844	if ((specialOptions_&64) != 0) {
1845	CglDuplicateRow dupcuts(solver_);
1846	dupcuts.setMode(2);
1847	CglStored * storedCuts = dupcuts.outDuplicates(solver_);
1848	if (storedCuts) {
1849	COIN_DETAIL_PRINT(printf("adding dup cuts\n"));
1850	addCutGenerator(storedCuts, 1, "StoredCuts from dominated",
1851	true, false, false, -200);
1852	}
1853	}
1854	if (!nodeCompare_)
1855	nodeCompare_ = new CbcCompareDefault();;
1856	// See if hot start wanted
1857	CbcCompareBase * saveCompare = NULL;
1858	// User supplied hotstart. Adapt for preprocessing.
1859	if (hotstartSolution_) {
1860	if (strategy_ && strategy_->preProcessState() > 0) {
1861	CglPreProcess * process = strategy_->process();
1862	assert (process);
1863	int n = solver_->getNumCols();
1864	const int * originalColumns = process->originalColumns();
1865	// columns should be in order ... but
1866	double * tempS = new double[n];
1867	for (int i = 0; i < n; i++) {
1868	int iColumn = originalColumns[i];
1869	tempS[i] = hotstartSolution_[iColumn];
1870	}
1871	delete [] hotstartSolution_;
1872	hotstartSolution_ = tempS;
1873	if (hotstartPriorities_) {
1874	int * tempP = new int [n];
1875	for (int i = 0; i < n; i++) {
1876	int iColumn = originalColumns[i];
1877	tempP[i] = hotstartPriorities_[iColumn];
1878	}
1879	delete [] hotstartPriorities_;
1880	hotstartPriorities_ = tempP;
1881	}
1882	}
1883	saveCompare = nodeCompare_;
1884	// depth first
1885	nodeCompare_ = new CbcCompareDepth();
1886	}
1887	if (!problemFeasibility_)
1888	problemFeasibility_ = new CbcFeasibilityBase();
1889	# ifdef CBC_DEBUG
1890	std::string problemName ;
1891	solver_->getStrParam(OsiProbName, problemName) ;
1892	printf("Problem name - %s\n", problemName.c_str()) ;
1893	solver_->setHintParam(OsiDoReducePrint, false, OsiHintDo, 0) ;
1894	# endif
1895	/*
1896	Assume we're done, and see if we're proven wrong.
1897	*/
1898	status_ = 0 ;
1899	secondaryStatus_ = 0;
1900	phase_ = 0;
1901	/*
1902	Scan the variables, noting the integer variables. Create an
1903	CbcSimpleInteger object for each integer variable.
1904	*/
1905	findIntegers(false) ;
1906	// Say not dynamic pseudo costs
1907	ownership_ &= ~0x40000000;
1908	// If dynamic pseudo costs then do
1909	if (numberBeforeTrust_)
1910	convertToDynamic();
1911	// Set up char array to say if integer (speed)
1912	delete [] integerInfo_;
1913	{
1914	int n = solver_->getNumCols();
1915	integerInfo_ = new char [n];
1916	for (int i = 0; i < n; i++) {
1917	if (solver_->isInteger(i))
1918	integerInfo_[i] = 1;
1919	else
1920	integerInfo_[i] = 0;
1921	}
1922	}
1923	if (preferredWay_) {
1924	// set all unset ones
1925	for (int iObject = 0 ; iObject < numberObjects_ ; iObject++) {
1926	CbcObject * obj =
1927	dynamic_cast <CbcObject *>(object_[iObject]) ;
1928	if (obj && !obj->preferredWay())
1929	obj->setPreferredWay(preferredWay_);
1930	}
1931	}
1932	/*
1933	Ensure that objects on the lists of OsiObjects, heuristics, and cut
1934	generators attached to this model all refer to this model.
1935	*/
1936	synchronizeModel() ;
1937	if (!solverCharacteristics_) {
1938	OsiBabSolver * solverCharacteristics = dynamic_cast<OsiBabSolver *> (solver_->getAuxiliaryInfo());
1939	if (solverCharacteristics) {
1940	solverCharacteristics_ = solverCharacteristics;
1941	} else {
1942	// replace in solver
1943	OsiBabSolver defaultC;
1944	solver_->setAuxiliaryInfo(&defaultC);
1945	solverCharacteristics_ = dynamic_cast<OsiBabSolver *> (solver_->getAuxiliaryInfo());
1946	}
1947	}
1948
1949	solverCharacteristics_->setSolver(solver_);
1950	// Set so we can tell we are in initial phase in resolve
1951	continuousObjective_ = -COIN_DBL_MAX ;
1952	/*
1953	Solve the relaxation.
1954
1955	Apparently there are circumstances where this will be non-trivial --- i.e.,
1956	we've done something since initialSolve that's trashed the solution to the
1957	continuous relaxation.
1958	*/
1959	/* Tell solver we are in Branch and Cut
1960	Could use last parameter for subtle differences */
1961	solver_->setHintParam(OsiDoInBranchAndCut, true, OsiHintDo, NULL) ;
1962	#ifdef COIN_HAS_CLP
1963	{
1964	OsiClpSolverInterface * clpSolver
1965	= dynamic_cast<OsiClpSolverInterface *> (solver_);
1966	if (clpSolver) {
1967	ClpSimplex * clpSimplex = clpSolver->getModelPtr();
1968	if ((specialOptions_&32) == 0) {
1969	// take off names
1970	clpSimplex->dropNames();
1971	}
1972	// no crunch if mostly continuous
1973	if ((clpSolver->specialOptions()&(1 + 8)) != (1 + 8)) {
1974	int numberColumns = solver_->getNumCols();
1975	if (numberColumns > 1000 && numberIntegers_*4 < numberColumns)
1976	clpSolver->setSpecialOptions(clpSolver->specialOptions()&(~1));
1977	}
1978	//#define NO_CRUNCH
1979	#ifdef NO_CRUNCH
1980	printf("TEMP switching off crunch\n");
1981	int iOpt = clpSolver->specialOptions();
1982	iOpt &= ~1;
1983	iOpt \|= 65536;
1984	clpSolver->setSpecialOptions(iOpt);
1985	#endif
1986	}
1987	}
1988	#endif
1989	bool feasible;
1990	numberSolves_ = 0 ;
1991	// If NLP then we assume already solved outside branchAndbound
1992	if (!solverCharacteristics_->solverType() \|\| solverCharacteristics_->solverType() == 4) {
1993	feasible = resolve(NULL, 0) != 0 ;
1994	} else {
1995	// pick up given status
1996	feasible = (solver_->isProvenOptimal() &&
1997	!solver_->isDualObjectiveLimitReached()) ;
1998	}
1999	if (problemFeasibility_->feasible(this, 0) < 0) {
2000	feasible = false; // pretend infeasible
2001	}
2002	numberSavedSolutions_ = 0;
2003	int saveNumberStrong = numberStrong_;
2004	int saveNumberBeforeTrust = numberBeforeTrust_;
2005	/*
2006	If the linear relaxation of the root is infeasible, bail out now. Otherwise,
2007	continue with processing the root node.
2008	*/
2009	if (!feasible) {
2010	status_ = 0 ;
2011	if (!solver_->isProvenDualInfeasible()) {
2012	handler_->message(CBC_INFEAS, messages_) << CoinMessageEol ;
2013	secondaryStatus_ = 1;
2014	} else {
2015	handler_->message(CBC_UNBOUNDED, messages_) << CoinMessageEol ;
2016	secondaryStatus_ = 7;
2017	}
2018	originalContinuousObjective_ = COIN_DBL_MAX;
2019	solverCharacteristics_ = NULL;
2020	return ;
2021	} else if (!numberObjects_ && (!strategy_ \|\| strategy_->preProcessState() <= 0)) {
2022	// nothing to do
2023	solverCharacteristics_ = NULL;
2024	bestObjective_ = solver_->getObjValue() * solver_->getObjSense();
2025	int numberColumns = solver_->getNumCols();
2026	delete [] bestSolution_;
2027	bestSolution_ = new double[numberColumns];
2028	CoinCopyN(solver_->getColSolution(), numberColumns, bestSolution_);
2029	return ;
2030	}
2031	/*
2032	See if we're using the Osi side of the branching hierarchy. If so, either
2033	convert existing CbcObjects to OsiObjects, or generate them fresh. In the
2034	first case, CbcModel owns the objects on the object_ list. In the second
2035	case, the solver holds the objects and object_ simply points to the
2036	solver's list.
2037
2038	080417 The conversion code here (the block protected by `if (obj)') cannot
2039	possibly be correct. On the Osi side, descent is OsiObject -> OsiObject2 ->
2040	all other Osi object classes. On the Cbc side, it's OsiObject -> CbcObject
2041	-> all other Cbc object classes. It's structurally impossible for any Osi
2042	object to descend from CbcObject. The only thing I can see is that this is
2043	really dead code, and object detection is now handled from the Osi side.
2044	*/
2045	// Convert to Osi if wanted
2046	bool useOsiBranching = false;
2047	//OsiBranchingInformation * persistentInfo = NULL;
2048	if (branchingMethod_ && branchingMethod_->chooseMethod()) {
2049	useOsiBranching = true;
2050	//persistentInfo = new OsiBranchingInformation(solver_);
2051	if (numberOriginalObjects) {
2052	for (int iObject = 0 ; iObject < numberObjects_ ; iObject++) {
2053	CbcObject * obj =
2054	dynamic_cast <CbcObject *>(object_[iObject]) ;
2055	if (obj) {
2056	CbcSimpleInteger * obj2 =
2057	dynamic_cast <CbcSimpleInteger *>(obj) ;
2058	if (obj2) {
2059	// back to Osi land
2060	object_[iObject] = obj2->osiObject();
2061	delete obj;
2062	} else {
2063	OsiSimpleInteger * obj3 =
2064	dynamic_cast <OsiSimpleInteger *>(obj) ;
2065	if (!obj3) {
2066	OsiSOS * obj4 =
2067	dynamic_cast <OsiSOS *>(obj) ;
2068	if (!obj4) {
2069	CbcSOS * obj5 =
2070	dynamic_cast <CbcSOS *>(obj) ;
2071	if (obj5) {
2072	// back to Osi land
2073	object_[iObject] = obj5->osiObject(solver_);
2074	} else {
2075	printf("Code up CbcObject type in Osi land\n");
2076	abort();
2077	}
2078	}
2079	}
2080	}
2081	}
2082	}
2083	// and add to solver
2084	//if (!solver_->numberObjects()) {
2085	solver_->addObjects(numberObjects_, object_);
2086	//} else {
2087	//if (solver_->numberObjects()!=numberOriginalObjects) {
2088	//printf("should have trapped that solver has objects before\n");
2089	//abort();
2090	//}
2091	//}
2092	} else {
2093	/*
2094	As of 080104, findIntegersAndSOS is misleading --- the default OSI
2095	implementation finds only integers.
2096	*/
2097	// do from solver
2098	deleteObjects(false);
2099	solver_->findIntegersAndSOS(false);
2100	numberObjects_ = solver_->numberObjects();
2101	object_ = solver_->objects();
2102	ownObjects_ = false;
2103	}
2104	branchingMethod_->chooseMethod()->setSolver(solver_);
2105	}
2106	// take off heuristics if have to (some do not work with SOS, for example)
2107	// object should know what's safe.
2108	{
2109	int numberOdd = 0;
2110	int numberSOS = 0;
2111	for (int i = 0; i < numberObjects_; i++) {
2112	if (!object_[i]->canDoHeuristics())
2113	numberOdd++;
2114	CbcSOS * obj =
2115	dynamic_cast <CbcSOS *>(object_[i]) ;
2116	if (obj)
2117	numberSOS++;
2118	}
2119	if (numberOdd) {
2120	if (numberHeuristics_) {
2121	int k = 0;
2122	for (int i = 0; i < numberHeuristics_; i++) {
2123	if (!heuristic_[i]->canDealWithOdd())
2124	delete heuristic_[i];
2125	else
2126	heuristic_[k++] = heuristic_[i];
2127	}
2128	if (!k) {
2129	delete [] heuristic_;
2130	heuristic_ = NULL;
2131	}
2132	numberHeuristics_ = k;
2133	handler_->message(CBC_HEURISTICS_OFF, messages_) << numberOdd << CoinMessageEol ;
2134	}
2135	} else if (numberSOS) {
2136	specialOptions_ \|= 128; // say can do SOS in dynamic mode
2137	// switch off fast nodes for now
2138	fastNodeDepth_ = -1;
2139	}
2140	if (numberThreads_ > 0) {
2141	// switch off fast nodes for now
2142	fastNodeDepth_ = -1;
2143	}
2144	}
2145	// Save objective (just so user can access it)
2146	originalContinuousObjective_ = solver_->getObjValue()* solver_->getObjSense();
2147	bestPossibleObjective_ = originalContinuousObjective_;
2148	sumChangeObjective1_ = 0.0;
2149	sumChangeObjective2_ = 0.0;
2150	/*
2151	OsiRowCutDebugger knows an optimal answer for a subset of MIP problems.
2152	Assuming it recognises the problem, when called upon it will check a cut to
2153	see if it cuts off the optimal answer.
2154	*/
2155	// If debugger exists set specialOptions_ bit
2156	if (solver_->getRowCutDebuggerAlways()) {
2157	specialOptions_ \|= 1;
2158	}
2159
2160	# ifdef CBC_DEBUG
2161	if ((specialOptions_&1) == 0)
2162	solver_->activateRowCutDebugger(problemName.c_str()) ;
2163	if (solver_->getRowCutDebuggerAlways())
2164	specialOptions_ \|= 1;
2165	# endif
2166
2167	/*
2168	Begin setup to process a feasible root node.
2169	*/
2170	bestObjective_ = CoinMin(bestObjective_, 1.0e50) ;
2171	if (!bestSolution_) {
2172	numberSolutions_ = 0 ;
2173	numberHeuristicSolutions_ = 0 ;
2174	}
2175	stateOfSearch_ = 0;
2176	// Everything is minimization
2177	{
2178	// needed to sync cutoffs
2179	double value ;
2180	solver_->getDblParam(OsiDualObjectiveLimit, value) ;
2181	dblParam_[CbcCurrentCutoff] = value * solver_->getObjSense();
2182	}
2183	double cutoff = getCutoff() ;
2184	double direction = solver_->getObjSense() ;
2185	dblParam_[CbcOptimizationDirection] = direction;
2186	if (cutoff < 1.0e20 && direction < 0.0)
2187	messageHandler()->message(CBC_CUTOFF_WARNING1,
2188	messages())
2189	<< cutoff << -cutoff << CoinMessageEol ;
2190	if (cutoff > bestObjective_)
2191	cutoff = bestObjective_ ;
2192	setCutoff(cutoff) ;
2193	/*
2194	We probably already have a current solution, but just in case ...
2195	*/
2196	int numberColumns = getNumCols() ;
2197	if (!currentSolution_)
2198	currentSolution_ = new double[numberColumns] ;
2199	testSolution_ = currentSolution_;
2200	/*
2201	Create a copy of the solver, thus capturing the original (root node)
2202	constraint system (aka the continuous system).
2203	*/
2204	continuousSolver_ = solver_->clone() ;
2205
2206	numberRowsAtContinuous_ = getNumRows() ;
2207	solver_->saveBaseModel();
2208	/*
2209	Check the objective to see if we can deduce a nontrivial increment. If
2210	it's better than the current value for CbcCutoffIncrement, it'll be
2211	installed.
2212	*/
2213	if (solverCharacteristics_->reducedCostsAccurate())
2214	analyzeObjective() ;
2215	{
2216	// may be able to change cutoff now
2217	double cutoff = getCutoff();
2218	double increment = getDblParam(CbcModel::CbcCutoffIncrement) ;
2219	if (cutoff > bestObjective_ - increment) {
2220	cutoff = bestObjective_ - increment ;
2221	setCutoff(cutoff) ;
2222	}
2223	}
2224	#ifdef COIN_HAS_CLP
2225	// Possible save of pivot method
2226	ClpDualRowPivot * savePivotMethod = NULL;
2227	{
2228	// pass tolerance and increment to solver
2229	OsiClpSolverInterface * clpSolver
2230	= dynamic_cast<OsiClpSolverInterface *> (solver_);
2231	if (clpSolver)
2232	clpSolver->setStuff(getIntegerTolerance(), getCutoffIncrement());
2233	#ifdef CLP_RESOLVE
2234	if ((moreSpecialOptions_&1048576)!=0&&!parentModel_&&clpSolver) {
2235	resolveClp(clpSolver,0);
2236	}
2237	#endif
2238	}
2239	#endif
2240	/*
2241	Set up for cut generation. addedCuts_ holds the cuts which are relevant for
2242	the active subproblem. whichGenerator will be used to record the generator
2243	that produced a given cut.
2244	*/
2245	maximumWhich_ = 1000 ;
2246	delete [] whichGenerator_;
2247	whichGenerator_ = new int[maximumWhich_] ;
2248	memset(whichGenerator_, 0, maximumWhich_*sizeof(int));
2249	maximumNumberCuts_ = 0 ;
2250	currentNumberCuts_ = 0 ;
2251	delete [] addedCuts_ ;
2252	addedCuts_ = NULL ;
2253	OsiObject ** saveObjects = NULL;
2254	maximumRows_ = numberRowsAtContinuous_;
2255	currentDepth_ = 0;
2256	workingBasis_.resize(maximumRows_, numberColumns);
2257	/*
2258	Set up an empty heap and associated data structures to hold the live set
2259	(problems which require further exploration).
2260	*/
2261	CbcCompareDefault * compareActual
2262	= dynamic_cast<CbcCompareDefault *> (nodeCompare_);
2263	if (compareActual) {
2264	compareActual->setBestPossible(direction*solver_->getObjValue());
2265	compareActual->setCutoff(getCutoff());
2266	#ifdef JJF_ZERO
2267	if (false && !numberThreads_ && !parentModel_) {
2268	printf("CbcTreeArray ? threads ? parentArray\n");
2269	// Setup new style tree
2270	delete tree_;
2271	tree_ = new CbcTreeArray();
2272	}
2273	#endif
2274	}
2275	tree_->setComparison(*nodeCompare_) ;
2276	/*
2277	Used to record the path from a node to the root of the search tree, so that
2278	we can then traverse from the root to the node when restoring a subproblem.
2279	*/
2280	maximumDepth_ = 10 ;
2281	delete [] walkback_ ;
2282	walkback_ = new CbcNodeInfo * [maximumDepth_] ;
2283	lastDepth_ = 0;
2284	delete [] lastNodeInfo_ ;
2285	lastNodeInfo_ = new CbcNodeInfo * [maximumDepth_] ;
2286	delete [] lastNumberCuts_ ;
2287	lastNumberCuts_ = new int [maximumDepth_] ;
2288	maximumCuts_ = 100;
2289	lastNumberCuts2_ = 0;
2290	delete [] lastCut_;
2291	lastCut_ = new const OsiRowCut * [maximumCuts_];
2292	/*
2293	Used to generate bound edits for CbcPartialNodeInfo.
2294	*/
2295	double * lowerBefore = new double [numberColumns] ;
2296	double * upperBefore = new double [numberColumns] ;
2297	/*
2298	Set up to run heuristics and generate cuts at the root node. The heavy
2299	lifting is hidden inside the calls to doHeuristicsAtRoot and solveWithCuts.
2300
2301	To start, tell cut generators they can be a bit more aggressive at the
2302	root node.
2303
2304	QUESTION: phase_ = 0 is documented as `initial solve', phase = 1 as `solve
2305	with cuts at root'. Is phase_ = 1 the correct indication when
2306	doHeurisiticsAtRoot is called to run heuristics outside of the main
2307	cut / heurisitc / reoptimise loop in solveWithCuts?
2308
2309	Generate cuts at the root node and reoptimise. solveWithCuts does the heavy
2310	lifting. It will iterate a generate/reoptimise loop (including reduced cost
2311	fixing) until no cuts are generated, the change in objective falls off, or
2312	the limit on the number of rounds of cut generation is exceeded.
2313
2314	At the end of all this, any cuts will be recorded in cuts and also
2315	installed in the solver's constraint system. We'll have reoptimised, and
2316	removed any slack cuts (numberOldActiveCuts_ and numberNewCuts_ have been
2317	adjusted accordingly).
2318
2319	Tell cut generators they can be a bit more aggressive at root node
2320
2321	TODO: Why don't we make a copy of the solution after solveWithCuts?
2322	TODO: If numberUnsatisfied == 0, don't we have a solution?
2323	*/
2324	phase_ = 1;
2325	int iCutGenerator;
2326	for (iCutGenerator = 0; iCutGenerator < numberCutGenerators_; iCutGenerator++) {
2327	// If parallel switch off global cuts
2328	if (numberThreads_) {
2329	generator_[iCutGenerator]->setGlobalCuts(false);
2330	generator_[iCutGenerator]->setGlobalCutsAtRoot(false);
2331	}
2332	CglCutGenerator * generator = generator_[iCutGenerator]->generator();
2333	generator->setAggressiveness(generator->getAggressiveness() + 100);
2334	}
2335	OsiCuts cuts ;
2336	int anyAction = -1 ;
2337	numberOldActiveCuts_ = 0 ;
2338	numberNewCuts_ = 0 ;
2339	// Array to mark solution
2340	delete [] usedInSolution_;
2341	usedInSolution_ = new int[numberColumns];
2342	CoinZeroN(usedInSolution_, numberColumns);
2343	/*
2344	For printing totals and for CbcNode (numberNodes_)
2345	*/
2346	numberIterations_ = 0 ;
2347	numberNodes_ = 0 ;
2348	numberNodes2_ = 0 ;
2349	maximumStatistics_ = 0;
2350	maximumDepthActual_ = 0;
2351	numberDJFixed_ = 0.0;
2352	if (!parentModel_) {
2353	if ((specialOptions_&262144) != 0) {
2354	// create empty stored cuts
2355	//storedRowCuts_ = new CglStored(solver_->getNumCols());
2356	} else if ((specialOptions_&524288) != 0 && storedRowCuts_) {
2357	// tighten and set best solution
2358	// A) tight bounds on integer variables
2359	/*
2360	storedRowCuts_ are coming in from outside, probably for nonlinear.
2361	John was unsure about origin.
2362	*/
2363	const double * lower = solver_->getColLower();
2364	const double * upper = solver_->getColUpper();
2365	const double * tightLower = storedRowCuts_->tightLower();
2366	const double * tightUpper = storedRowCuts_->tightUpper();
2367	int nTightened = 0;
2368	for (int i = 0; i < numberIntegers_; i++) {
2369	int iColumn = integerVariable_[i];
2370	if (tightLower[iColumn] > lower[iColumn]) {
2371	nTightened++;
2372	solver_->setColLower(iColumn, tightLower[iColumn]);
2373	}
2374	if (tightUpper[iColumn] < upper[iColumn]) {
2375	nTightened++;
2376	solver_->setColUpper(iColumn, tightUpper[iColumn]);
2377	}
2378	}
2379	if (nTightened)
2380	COIN_DETAIL_PRINT(printf("%d tightened by alternate cuts\n", nTightened));
2381	if (storedRowCuts_->bestObjective() < bestObjective_) {
2382	// B) best solution
2383	double objValue = storedRowCuts_->bestObjective();
2384	setBestSolution(CBC_SOLUTION, objValue,
2385	storedRowCuts_->bestSolution()) ;
2386	// Do heuristics
2387	// Allow RINS
2388	for (int i = 0; i < numberHeuristics_; i++) {
2389	CbcHeuristicRINS * rins
2390	= dynamic_cast<CbcHeuristicRINS *> (heuristic_[i]);
2391	if (rins) {
2392	rins->setLastNode(-100);
2393	}
2394	}
2395	}
2396	}
2397	}
2398	/*
2399	Run heuristics at the root. This is the only opportunity to run FPump; it
2400	will be removed from the heuristics list by doHeuristicsAtRoot.
2401	*/
2402	// Do heuristics
2403	if (numberObjects_)
2404	doHeuristicsAtRoot();
2405	if (solverCharacteristics_->solutionAddsCuts()) {
2406	// With some heuristics solver needs a resolve here
2407	solver_->resolve();
2408	if(!isProvenOptimal()){
2409	solver_->initialSolve();
2410	}
2411	}
2412	/*
2413	Grepping through the code, it would appear that this is a command line
2414	debugging hook. There's no obvious place in the code where this is set to
2415	a negative value.
2416
2417	User hook, says John.
2418	*/
2419	if ( intParam_[CbcMaxNumNode] < 0)
2420	eventHappened_ = true; // stop as fast as possible
2421	stoppedOnGap_ = false ;
2422	// See if can stop on gap
2423	bestPossibleObjective_ = solver_->getObjValue() * solver_->getObjSense();
2424	if(canStopOnGap()) {
2425	if (bestPossibleObjective_ < getCutoff())
2426	stoppedOnGap_ = true ;
2427	feasible = false;
2428	//eventHappened_=true; // stop as fast as possible
2429	}
2430	/*
2431	Set up for statistics collection, if requested. Standard values are
2432	documented in CbcModel.hpp. The magic number 100 will trigger a dump of
2433	CbcSimpleIntegerDynamicPseudoCost objects (no others). Looks like another
2434	command line debugging hook.
2435	*/
2436	statistics_ = NULL;
2437	// Do on switch
2438	if (doStatistics > 0 && doStatistics <= 100) {
2439	maximumStatistics_ = 10000;
2440	statistics_ = new CbcStatistics * [maximumStatistics_];
2441	memset(statistics_, 0, maximumStatistics_sizeof(CbcStatistics ));
2442	}
2443	// See if we can add integers
2444	if (noObjects && numberIntegers_ < solver_->getNumCols() && (specialOptions_&65536) != 0 && !parentModel_)
2445	AddIntegers();
2446	/*
2447	Do an initial round of cut generation for the root node. Depending on the
2448	type of underlying solver, we may want to do this even if the initial query
2449	to the objects indicates they're satisfied.
2450
2451	solveWithCuts does the heavy lifting. It will iterate a generate/reoptimise
2452	loop (including reduced cost fixing) until no cuts are generated, the
2453	change in objective falls off, or the limit on the number of rounds of cut
2454	generation is exceeded.
2455
2456	At the end of all this, any cuts will be recorded in cuts and also
2457	installed in the solver's constraint system. We'll have reoptimised, and
2458	removed any slack cuts (numberOldActiveCuts_ and numberNewCuts_ have been
2459	adjusted accordingly).
2460	*/
2461	int iObject ;
2462	int preferredWay ;
2463	int numberUnsatisfied = 0 ;
2464	delete [] currentSolution_;
2465	currentSolution_ = new double [numberColumns];
2466	testSolution_ = currentSolution_;
2467	memcpy(currentSolution_, solver_->getColSolution(),
2468	numberColumns*sizeof(double)) ;
2469	// point to useful information
2470	OsiBranchingInformation usefulInfo = usefulInformation();
2471
2472	for (iObject = 0 ; iObject < numberObjects_ ; iObject++) {
2473	double infeasibility =
2474	object_[iObject]->infeasibility(&usefulInfo, preferredWay) ;
2475	if (infeasibility ) numberUnsatisfied++ ;
2476	}
2477	// replace solverType
2478	if (solverCharacteristics_->tryCuts()) {
2479
2480	if (numberUnsatisfied) {
2481	// User event
2482	if (!eventHappened_ && feasible) {
2483	feasible = solveWithCuts(cuts, maximumCutPassesAtRoot_,
2484	NULL);
2485	if ((specialOptions_&524288) != 0 && !parentModel_
2486	&& storedRowCuts_) {
2487	if (feasible) {
2488	/* pick up stuff and try again
2489	add cuts, maybe keep around
2490	do best solution and if so new heuristics
2491	obviously tighten bounds
2492	*/
2493	// A and B probably done on entry
2494	// A) tight bounds on integer variables
2495	const double * lower = solver_->getColLower();
2496	const double * upper = solver_->getColUpper();
2497	const double * tightLower = storedRowCuts_->tightLower();
2498	const double * tightUpper = storedRowCuts_->tightUpper();
2499	int nTightened = 0;
2500	for (int i = 0; i < numberIntegers_; i++) {
2501	int iColumn = integerVariable_[i];
2502	if (tightLower[iColumn] > lower[iColumn]) {
2503	nTightened++;
2504	solver_->setColLower(iColumn, tightLower[iColumn]);
2505	}
2506	if (tightUpper[iColumn] < upper[iColumn]) {
2507	nTightened++;
2508	solver_->setColUpper(iColumn, tightUpper[iColumn]);
2509	}
2510	}
2511	if (nTightened)
2512	COIN_DETAIL_PRINT(printf("%d tightened by alternate cuts\n", nTightened));
2513	if (storedRowCuts_->bestObjective() < bestObjective_) {
2514	// B) best solution
2515	double objValue = storedRowCuts_->bestObjective();
2516	setBestSolution(CBC_SOLUTION, objValue,
2517	storedRowCuts_->bestSolution()) ;
2518	// Do heuristics
2519	// Allow RINS
2520	for (int i = 0; i < numberHeuristics_; i++) {
2521	CbcHeuristicRINS * rins
2522	= dynamic_cast<CbcHeuristicRINS *> (heuristic_[i]);
2523	if (rins) {
2524	rins->setLastNode(-100);
2525	}
2526	}
2527	doHeuristicsAtRoot();
2528	}
2529	#ifdef JJF_ZERO
2530	int nCuts = storedRowCuts_->sizeRowCuts();
2531	// add to global list
2532	for (int i = 0; i < nCuts; i++) {
2533	OsiRowCut newCut(*storedRowCuts_->rowCutPointer(i));
2534	newCut.setGloballyValidAsInteger(2);
2535	newCut.mutableRow().setTestForDuplicateIndex(false);
2536	globalCuts_.insert(newCut) ;
2537	}
2538	#else
2539	addCutGenerator(storedRowCuts_, -99, "Stored from previous run",
2540	true, false, false, -200);
2541	#endif
2542	// Set cuts as active
2543	delete [] addedCuts_ ;
2544	maximumNumberCuts_ = cuts.sizeRowCuts();
2545	if (maximumNumberCuts_) {
2546	addedCuts_ = new CbcCountRowCut * [maximumNumberCuts_];
2547	} else {
2548	addedCuts_ = NULL;
2549	}
2550	for (int i = 0; i < maximumNumberCuts_; i++)
2551	addedCuts_[i] = new CbcCountRowCut(*cuts.rowCutPtr(i),
2552	NULL, -1, -1, 2);
2553	COIN_DETAIL_PRINT(printf("size %d\n", cuts.sizeRowCuts()));
2554	cuts = OsiCuts();
2555	currentNumberCuts_ = maximumNumberCuts_;
2556	feasible = solveWithCuts(cuts, maximumCutPassesAtRoot_,
2557	NULL);
2558	for (int i = 0; i < maximumNumberCuts_; i++)
2559	delete addedCuts_[i];
2560	}
2561	delete storedRowCuts_;
2562	storedRowCuts_ = NULL;
2563	}
2564	} else {
2565	feasible = false;
2566	}
2567	} else if (solverCharacteristics_->solutionAddsCuts() \|\|
2568	solverCharacteristics_->alwaysTryCutsAtRootNode()) {
2569	// may generate cuts and turn the solution
2570	//to an infeasible one
2571	feasible = solveWithCuts(cuts, 2,
2572	NULL);
2573	}
2574	}
2575	// check extra info on feasibility
2576	if (!solverCharacteristics_->mipFeasible())
2577	feasible = false;
2578
2579	#ifdef CLP_RESOLVE
2580	if ((moreSpecialOptions_&2097152)!=0&&!parentModel_&&feasible) {
2581	OsiClpSolverInterface * clpSolver
2582	= dynamic_cast<OsiClpSolverInterface *> (solver_);
2583	if (clpSolver)
2584	resolveClp(clpSolver,0);
2585	}
2586	#endif
2587	// make cut generators less aggressive
2588	for (iCutGenerator = 0; iCutGenerator < numberCutGenerators_; iCutGenerator++) {
2589	CglCutGenerator * generator = generator_[iCutGenerator]->generator();
2590	generator->setAggressiveness(generator->getAggressiveness() - 100);
2591	}
2592	currentNumberCuts_ = numberNewCuts_ ;
2593	if (solverCharacteristics_->solutionAddsCuts()) {
2594	// With some heuristics solver needs a resolve here (don't know if this is bug in heuristics)
2595	solver_->resolve();
2596	if(!isProvenOptimal()){
2597	solver_->initialSolve();
2598	}
2599	}
2600	// See if can stop on gap
2601	bestPossibleObjective_ = solver_->getObjValue() * solver_->getObjSense();
2602	if(canStopOnGap()) {
2603	if (bestPossibleObjective_ < getCutoff())
2604	stoppedOnGap_ = true ;
2605	feasible = false;
2606	}
2607	// User event
2608	if (eventHappened_)
2609	feasible = false;
2610	#if defined(COIN_HAS_CLP)&&defined(COIN_HAS_CPX)
2611	/*
2612	This is the notion of using Cbc stuff to get going, then calling cplex to
2613	finish off.
2614	*/
2615	if (feasible && (specialOptions_&16384) != 0 && fastNodeDepth_ == -2 && !parentModel_) {
2616	// Use Cplex to do search!
2617	double time1 = CoinCpuTime();
2618	OsiClpSolverInterface * clpSolver
2619	= dynamic_cast<OsiClpSolverInterface *> (solver_);
2620	OsiCpxSolverInterface cpxSolver;
2621	double direction = clpSolver->getObjSense();
2622	cpxSolver.setObjSense(direction);
2623	// load up cplex
2624	const CoinPackedMatrix * matrix = continuousSolver_->getMatrixByCol();
2625	const double * rowLower = continuousSolver_->getRowLower();
2626	const double * rowUpper = continuousSolver_->getRowUpper();
2627	const double * columnLower = continuousSolver_->getColLower();
2628	const double * columnUpper = continuousSolver_->getColUpper();
2629	const double * objective = continuousSolver_->getObjCoefficients();
2630	cpxSolver.loadProblem(*matrix, columnLower, columnUpper,
2631	objective, rowLower, rowUpper);
2632	double * setSol = new double [numberIntegers_];
2633	int * setVar = new int [numberIntegers_];
2634	// cplex doesn't know about objective offset
2635	double offset = clpSolver->getModelPtr()->objectiveOffset();
2636	for (int i = 0; i < numberIntegers_; i++) {
2637	int iColumn = integerVariable_[i];
2638	cpxSolver.setInteger(iColumn);
2639	if (bestSolution_) {
2640	setSol[i] = bestSolution_[iColumn];
2641	setVar[i] = iColumn;
2642	}
2643	}
2644	CPXENVptr env = cpxSolver.getEnvironmentPtr();
2645	CPXLPptr lpPtr = cpxSolver.getLpPtr(OsiCpxSolverInterface::KEEPCACHED_ALL);
2646	cpxSolver.switchToMIP();
2647	if (bestSolution_) {
2648	CPXcopymipstart(env, lpPtr, numberIntegers_, setVar, setSol);
2649	}
2650	if (clpSolver->getNumRows() > continuousSolver_->getNumRows() && false) {
2651	// add cuts
2652	const CoinPackedMatrix * matrix = clpSolver->getMatrixByRow();
2653	const double * rhs = clpSolver->getRightHandSide();
2654	const char * rowSense = clpSolver->getRowSense();
2655	const double * elementByRow = matrix->getElements();
2656	const int * column = matrix->getIndices();
2657	const CoinBigIndex * rowStart = matrix->getVectorStarts();
2658	const int * rowLength = matrix->getVectorLengths();
2659	int nStart = continuousSolver_->getNumRows();
2660	int nRows = clpSolver->getNumRows();
2661	int size = rowStart[nRows-1] + rowLength[nRows-1] -
2662	rowStart[nStart];
2663	int nAdd = 0;
2664	double * rmatval = new double [size];
2665	int * rmatind = new int [size];
2666	int * rmatbeg = new int [nRows-nStart+1];
2667	size = 0;
2668	rmatbeg[0] = 0;
2669	for (int i = nStart; i < nRows; i++) {
2670	for (int k = rowStart[i]; k < rowStart[i] + rowLength[i]; k++) {
2671	rmatind[size] = column[k];
2672	rmatval[size++] = elementByRow[k];
2673	}
2674	nAdd++;
2675	rmatbeg[nAdd] = size;
2676	}
2677	CPXaddlazyconstraints(env, lpPtr, nAdd, size,
2678	rhs, rowSense, rmatbeg,
2679	rmatind, rmatval, NULL);
2680	CPXsetintparam( env, CPX_PARAM_REDUCE,
2681	// CPX_PREREDUCE_NOPRIMALORDUAL (0)
2682	CPX_PREREDUCE_PRIMALONLY);
2683	}
2684	if (getCutoff() < 1.0e50) {
2685	double useCutoff = getCutoff() + offset;
2686	if (bestObjective_ < 1.0e50)
2687	useCutoff = bestObjective_ + offset + 1.0e-7;
2688	cpxSolver.setDblParam(OsiDualObjectiveLimit, useCutoff*
2689	direction);
2690	if ( direction > 0.0 )
2691	CPXsetdblparam( env, CPX_PARAM_CUTUP, useCutoff ) ; // min
2692	else
2693	CPXsetdblparam( env, CPX_PARAM_CUTLO, useCutoff ) ; // max
2694	}
2695	CPXsetdblparam(env, CPX_PARAM_EPGAP, dblParam_[CbcAllowableFractionGap]);
2696	delete [] setSol;
2697	delete [] setVar;
2698	char printBuffer[200];
2699	if (offset) {
2700	sprintf(printBuffer, "Add %g to all Cplex messages for true objective",
2701	-offset);
2702	messageHandler()->message(CBC_GENERAL, messages())
2703	<< printBuffer << CoinMessageEol ;
2704	cpxSolver.setDblParam(OsiObjOffset, offset);
2705	}
2706	cpxSolver.branchAndBound();
2707	double timeTaken = CoinCpuTime() - time1;
2708	sprintf(printBuffer, "Cplex took %g seconds",
2709	timeTaken);
2710	messageHandler()->message(CBC_GENERAL, messages())
2711	<< printBuffer << CoinMessageEol ;
2712	numberExtraNodes_ = CPXgetnodecnt(env, lpPtr);
2713	numberExtraIterations_ = CPXgetmipitcnt(env, lpPtr);
2714	double value = cpxSolver.getObjValue() * direction;
2715	if (cpxSolver.isProvenOptimal() && value <= getCutoff()) {
2716	feasible = true;
2717	clpSolver->setWarmStart(NULL);
2718	// try and do solution
2719	double * newSolution =
2720	CoinCopyOfArray(cpxSolver.getColSolution(),
2721	getNumCols());
2722	setBestSolution(CBC_STRONGSOL, value, newSolution) ;
2723	delete [] newSolution;
2724	}
2725	feasible = false;
2726	}
2727	#endif
2728	/*
2729	A hook to use clp to quickly explore some part of the tree.
2730	*/
2731	if (fastNodeDepth_ == 1000 &&/!parentModel_/(specialOptions_&2048) == 0) {
2732	fastNodeDepth_ = -1;
2733	CbcObject * obj =
2734	new CbcFollowOn(this);
2735	obj->setPriority(1);
2736	addObjects(1, &obj);
2737	}
2738	int saveNumberSolves = numberSolves_;
2739	int saveNumberIterations = numberIterations_;
2740	if (fastNodeDepth_ >= 0 &&/!parentModel_/(specialOptions_&2048) == 0) {
2741	// add in a general depth object doClp
2742	int type = (fastNodeDepth_ <= 100) ? fastNodeDepth_ : -(fastNodeDepth_ - 100);
2743	CbcObject * obj =
2744	new CbcGeneralDepth(this, type);
2745	addObjects(1, &obj);
2746	// mark as done
2747	fastNodeDepth_ += 1000000;
2748	delete obj;
2749	// fake number of objects
2750	numberObjects_--;
2751	if (parallelMode() < -1) {
2752	// But make sure position is correct
2753	OsiObject * obj2 = object_[numberObjects_];
2754	obj = dynamic_cast<CbcObject *> (obj2);
2755	assert (obj);
2756	obj->setPosition(numberObjects_);
2757	}
2758	}
2759	#ifdef COIN_HAS_CLP
2760	#ifdef NO_CRUNCH
2761	if (true) {
2762	OsiClpSolverInterface * clpSolver
2763	= dynamic_cast<OsiClpSolverInterface *> (solver_);
2764	if (clpSolver && !parentModel_) {
2765	ClpSimplex * clpSimplex = clpSolver->getModelPtr();
2766	clpSimplex->setSpecialOptions(clpSimplex->specialOptions() \| 131072);
2767	//clpSimplex->startPermanentArrays();
2768	clpSimplex->setPersistenceFlag(2);
2769	}
2770	}
2771	#endif
2772	#endif
2773	// Save copy of solver
2774	OsiSolverInterface * saveSolver = NULL;
2775	if (!parentModel_ && (specialOptions_&(512 + 32768)) != 0)
2776	saveSolver = solver_->clone();
2777	double checkCutoffForRestart = 1.0e100;
2778	saveModel(saveSolver, &checkCutoffForRestart, &feasible);
2779	if ((specialOptions_&262144) != 0 && !parentModel_) {
2780	// Save stuff and return!
2781	storedRowCuts_->saveStuff(bestObjective_, bestSolution_,
2782	solver_->getColLower(),
2783	solver_->getColUpper());
2784	delete [] lowerBefore;
2785	delete [] upperBefore;
2786	delete saveSolver;
2787	return;
2788	}
2789	/*
2790	We've taken the continuous relaxation as far as we can. Time to branch.
2791	The first order of business is to actually create a node. chooseBranch
2792	currently uses strong branching to evaluate branch object candidates,
2793	unless forced back to simple branching. If chooseBranch concludes that a
2794	branching candidate is monotone (anyAction == -1) or infeasible (anyAction
2795	== -2) when forced to integer values, it returns here immediately.
2796
2797	Monotone variables trigger a call to resolve(). If the problem remains
2798	feasible, try again to choose a branching variable. At the end of the loop,
2799	resolved == true indicates that some variables were fixed.
2800
2801	Loss of feasibility will result in the deletion of newNode.
2802	*/
2803
2804	bool resolved = false ;
2805	CbcNode *newNode = NULL ;
2806	numberFixedAtRoot_ = 0;
2807	numberFixedNow_ = 0;
2808	int numberIterationsAtContinuous = numberIterations_;
2809	//solverCharacteristics_->setSolver(solver_);
2810	if (feasible) {
2811	//#define HOTSTART -1
2812	#if HOTSTART<0
2813	if (bestSolution_ && !parentModel_ && !hotstartSolution_ &&
2814	(moreSpecialOptions_&1024) != 0) {
2815	// Set priorities so only branch on ones we need to
2816	// use djs and see if only few branches needed
2817	#ifndef NDEBUG
2818	double integerTolerance = getIntegerTolerance() ;
2819	#endif
2820	bool possible = true;
2821	const double * saveLower = continuousSolver_->getColLower();
2822	const double * saveUpper = continuousSolver_->getColUpper();
2823	for (int i = 0; i < numberObjects_; i++) {
2824	const CbcSimpleInteger * thisOne = dynamic_cast <const CbcSimpleInteger *> (object_[i]);
2825	if (thisOne) {
2826	int iColumn = thisOne->columnNumber();
2827	if (saveUpper[iColumn] > saveLower[iColumn] + 1.5) {
2828	possible = false;
2829	break;
2830	}
2831	} else {
2832	possible = false;
2833	break;
2834	}
2835	}
2836	if (possible) {
2837	OsiSolverInterface * solver = continuousSolver_->clone();
2838	int numberColumns = solver->getNumCols();
2839	for (int iColumn = 0 ; iColumn < numberColumns ; iColumn++) {
2840	double value = bestSolution_[iColumn] ;
2841	value = CoinMax(value, saveLower[iColumn]) ;
2842	value = CoinMin(value, saveUpper[iColumn]) ;
2843	value = floor(value + 0.5);
2844	if (solver->isInteger(iColumn)) {
2845	solver->setColLower(iColumn, value);
2846	solver->setColUpper(iColumn, value);
2847	}
2848	}
2849	solver->setHintParam(OsiDoDualInResolve, false, OsiHintTry);
2850	// objlim and all slack
2851	double direction = solver->getObjSense();
2852	solver->setDblParam(OsiDualObjectiveLimit, 1.0e50*direction);
2853	CoinWarmStartBasis * basis = dynamic_cast<CoinWarmStartBasis *> (solver->getEmptyWarmStart());
2854	solver->setWarmStart(basis);
2855	delete basis;
2856	bool changed = true;
2857	hotstartPriorities_ = new int [numberColumns];
2858	for (int iColumn = 0; iColumn < numberColumns; iColumn++)
2859	hotstartPriorities_[iColumn] = 1;
2860	while (changed) {
2861	changed = false;
2862	solver->resolve();
2863	if (!solver->isProvenOptimal()) {
2864	possible = false;
2865	break;
2866	}
2867	const double * dj = solver->getReducedCost();
2868	const double * colLower = solver->getColLower();
2869	const double * colUpper = solver->getColUpper();
2870	const double * solution = solver->getColSolution();
2871	int nAtLbNatural = 0;
2872	int nAtUbNatural = 0;
2873	int nZeroDj = 0;
2874	int nForced = 0;
2875	for (int iColumn = 0 ; iColumn < numberColumns ; iColumn++) {
2876	double value = solution[iColumn] ;
2877	value = CoinMax(value, saveLower[iColumn]) ;
2878	value = CoinMin(value, saveUpper[iColumn]) ;
2879	if (solver->isInteger(iColumn)) {
2880	assert(fabs(value - solution[iColumn]) <= integerTolerance) ;
2881	if (hotstartPriorities_[iColumn] == 1) {
2882	if (dj[iColumn] < -1.0e-6) {
2883	// negative dj
2884	if (saveUpper[iColumn] == colUpper[iColumn]) {
2885	nAtUbNatural++;
2886	hotstartPriorities_[iColumn] = 2;
2887	solver->setColLower(iColumn, saveLower[iColumn]);
2888	solver->setColUpper(iColumn, saveUpper[iColumn]);
2889	} else {
2890	nForced++;
2891	}
2892	} else if (dj[iColumn] > 1.0e-6) {
2893	// positive dj
2894	if (saveLower[iColumn] == colLower[iColumn]) {
2895	nAtLbNatural++;
2896	hotstartPriorities_[iColumn] = 2;
2897	solver->setColLower(iColumn, saveLower[iColumn]);
2898	solver->setColUpper(iColumn, saveUpper[iColumn]);
2899	} else {
2900	nForced++;
2901	}
2902	} else {
2903	// zero dj
2904	nZeroDj++;
2905	}
2906	}
2907	}
2908	}
2909	#ifdef CLP_INVESTIGATE
2910	printf("%d forced, %d naturally at lower, %d at upper - %d zero dj\n",
2911	nForced, nAtLbNatural, nAtUbNatural, nZeroDj);
2912	#endif
2913	if (nAtLbNatural \|\| nAtUbNatural) {
2914	changed = true;
2915	} else {
2916	if (nForced + nZeroDj > 50 \|\|
2917	(nForced + nZeroDj)*4 > numberIntegers_)
2918	possible = false;
2919	}
2920	}
2921	delete solver;
2922	}
2923	if (possible) {
2924	setHotstartSolution(bestSolution_);
2925	if (!saveCompare) {
2926	// create depth first comparison
2927	saveCompare = nodeCompare_;
2928	// depth first
2929	nodeCompare_ = new CbcCompareDepth();
2930	tree_->setComparison(*nodeCompare_) ;
2931	}
2932	} else {
2933	delete [] hotstartPriorities_;
2934	hotstartPriorities_ = NULL;
2935	}
2936	}
2937	#endif
2938	#if HOTSTART>0
2939	if (hotstartSolution_ && !hotstartPriorities_) {
2940	// Set up hot start
2941	OsiSolverInterface * solver = solver_->clone();
2942	double direction = solver_->getObjSense() ;
2943	int numberColumns = solver->getNumCols();
2944	double * saveLower = CoinCopyOfArray(solver->getColLower(), numberColumns);
2945	double * saveUpper = CoinCopyOfArray(solver->getColUpper(), numberColumns);
2946	// move solution
2947	solver->setColSolution(hotstartSolution_);
2948	// point to useful information
2949	const double * saveSolution = testSolution_;
2950	testSolution_ = solver->getColSolution();
2951	OsiBranchingInformation usefulInfo = usefulInformation();
2952	testSolution_ = saveSolution;
2953	/*
2954	Run through the objects and use feasibleRegion() to set variable bounds
2955	so as to fix the variables specified in the objects at their value in this
2956	solution. Since the object list contains (at least) one object for every
2957	integer variable, this has the effect of fixing all integer variables.
2958	*/
2959	for (int i = 0; i < numberObjects_; i++)
2960	object_[i]->feasibleRegion(solver, &usefulInfo);
2961	solver->resolve();
2962	assert (solver->isProvenOptimal());
2963	double gap = CoinMax((solver->getObjValue() - solver_->getObjValue()) * direction, 0.0) ;
2964	const double * dj = solver->getReducedCost();
2965	const double * colLower = solver->getColLower();
2966	const double * colUpper = solver->getColUpper();
2967	const double * solution = solver->getColSolution();
2968	int nAtLbNatural = 0;
2969	int nAtUbNatural = 0;
2970	int nAtLbNaturalZero = 0;
2971	int nAtUbNaturalZero = 0;
2972	int nAtLbFixed = 0;
2973	int nAtUbFixed = 0;
2974	int nAtOther = 0;
2975	int nAtOtherNatural = 0;
2976	int nNotNeeded = 0;
2977	delete [] hotstartSolution_;
2978	hotstartSolution_ = new double [numberColumns];
2979	delete [] hotstartPriorities_;
2980	hotstartPriorities_ = new int [numberColumns];
2981	int * order = (int *) saveUpper;
2982	int nFix = 0;
2983	double bestRatio = COIN_DBL_MAX;
2984	for (int iColumn = 0 ; iColumn < numberColumns ; iColumn++) {
2985	double value = solution[iColumn] ;
2986	value = CoinMax(value, saveLower[iColumn]) ;
2987	value = CoinMin(value, saveUpper[iColumn]) ;
2988	double sortValue = COIN_DBL_MAX;
2989	if (solver->isInteger(iColumn)) {
2990	assert(fabs(value - solution[iColumn]) <= 1.0e-5) ;
2991	double value2 = floor(value + 0.5);
2992	if (dj[iColumn] < -1.0e-6) {
2993	// negative dj
2994	//assert (value2==colUpper[iColumn]);
2995	if (saveUpper[iColumn] == colUpper[iColumn]) {
2996	nAtUbNatural++;
2997	sortValue = 0.0;
2998	double value = -dj[iColumn];
2999	if (value > gap)
3000	nFix++;
3001	else if (gap < value*bestRatio)
3002	bestRatio = gap / value;
3003	if (saveLower[iColumn] != colLower[iColumn]) {
3004	nNotNeeded++;
3005	sortValue = 1.0e20;
3006	}
3007	} else if (saveLower[iColumn] == colUpper[iColumn]) {
3008	nAtLbFixed++;
3009	sortValue = dj[iColumn];
3010	} else {
3011	nAtOther++;
3012	sortValue = 0.0;
3013	if (saveLower[iColumn] != colLower[iColumn] &&
3014	saveUpper[iColumn] != colUpper[iColumn]) {
3015	nNotNeeded++;
3016	sortValue = 1.0e20;
3017	}
3018	}
3019	} else if (dj[iColumn] > 1.0e-6) {
3020	// positive dj
3021	//assert (value2==colLower[iColumn]);
3022	if (saveLower[iColumn] == colLower[iColumn]) {
3023	nAtLbNatural++;
3024	sortValue = 0.0;
3025	double value = dj[iColumn];
3026	if (value > gap)
3027	nFix++;
3028	else if (gap < value*bestRatio)
3029	bestRatio = gap / value;
3030	if (saveUpper[iColumn] != colUpper[iColumn]) {
3031	nNotNeeded++;
3032	sortValue = 1.0e20;
3033	}
3034	} else if (saveUpper[iColumn] == colLower[iColumn]) {
3035	nAtUbFixed++;
3036	sortValue = -dj[iColumn];
3037	} else {
3038	nAtOther++;
3039	sortValue = 0.0;
3040	if (saveLower[iColumn] != colLower[iColumn] &&
3041	saveUpper[iColumn] != colUpper[iColumn]) {
3042	nNotNeeded++;
3043	sortValue = 1.0e20;
3044	}
3045	}
3046	} else {
3047	// zero dj
3048	if (value2 == saveUpper[iColumn]) {
3049	nAtUbNaturalZero++;
3050	sortValue = 0.0;
3051	if (saveLower[iColumn] != colLower[iColumn]) {
3052	nNotNeeded++;
3053	sortValue = 1.0e20;
3054	}
3055	} else if (value2 == saveLower[iColumn]) {
3056	nAtLbNaturalZero++;
3057	sortValue = 0.0;
3058	} else {
3059	nAtOtherNatural++;
3060	sortValue = 0.0;
3061	if (saveLower[iColumn] != colLower[iColumn] &&
3062	saveUpper[iColumn] != colUpper[iColumn]) {
3063	nNotNeeded++;
3064	sortValue = 1.0e20;
3065	}
3066	}
3067	}
3068	#if HOTSTART==3
3069	sortValue = -fabs(dj[iColumn]);
3070	#endif
3071	}
3072	hotstartSolution_[iColumn] = value ;
3073	saveLower[iColumn] = sortValue;
3074	order[iColumn] = iColumn;
3075	}
3076	COIN_DETAIL_PRINT(printf("** can fix %d columns - best ratio for others is %g on gap of %g\n",
3077	nFix, bestRatio, gap));
3078	int nNeg = 0;
3079	CoinSort_2(saveLower, saveLower + numberColumns, order);
3080	for (int i = 0; i < numberColumns; i++) {
3081	if (saveLower[i] < 0.0) {
3082	nNeg++;
3083	#if HOTSTART==2\|\|HOTSTART==3
3084	// swap sign ?
3085	saveLower[i] = -saveLower[i];
3086	#endif
3087	}
3088	}
3089	CoinSort_2(saveLower, saveLower + nNeg, order);
3090	for (int i = 0; i < numberColumns; i++) {
3091	#if HOTSTART==1
3092	hotstartPriorities_[order[i]] = 100;
3093	#else
3094	hotstartPriorities_[order[i]] = -(i + 1);
3095	#endif
3096	}
3097	COIN_DETAIL_PRINT(printf("nAtLbNat %d,nAtUbNat %d,nAtLbNatZero %d,nAtUbNatZero %d,nAtLbFixed %d,nAtUbFixed %d,nAtOther %d,nAtOtherNat %d, useless %d %d\n",
3098	nAtLbNatural,
3099	nAtUbNatural,
3100	nAtLbNaturalZero,
3101	nAtUbNaturalZero,
3102	nAtLbFixed,
3103	nAtUbFixed,
3104	nAtOther,
3105	nAtOtherNatural, nNotNeeded, nNeg));
3106	delete [] saveLower;
3107	delete [] saveUpper;
3108	if (!saveCompare) {
3109	// create depth first comparison
3110	saveCompare = nodeCompare_;
3111	// depth first
3112	nodeCompare_ = new CbcCompareDepth();
3113	tree_->setComparison(*nodeCompare_) ;
3114	}
3115	}
3116	#endif
3117	newNode = new CbcNode ;
3118	// Set objective value (not so obvious if NLP etc)
3119	setObjectiveValue(newNode, NULL);
3120	anyAction = -1 ;
3121	// To make depth available we may need a fake node
3122	CbcNode fakeNode;
3123	if (!currentNode_) {
3124	// Not true if sub trees assert (!numberNodes_);
3125	currentNode_ = &fakeNode;
3126	}
3127	phase_ = 3;
3128	// only allow 1000 passes
3129	int numberPassesLeft = 1000;
3130	// This is first crude step
3131	if (numberAnalyzeIterations_) {
3132	delete [] analyzeResults_;
3133	analyzeResults_ = new double [4*numberIntegers_];
3134	numberFixedAtRoot_ = newNode->analyze(this, analyzeResults_);
3135	if (numberFixedAtRoot_ > 0) {
3136	COIN_DETAIL_PRINT(printf("%d fixed by analysis\n", numberFixedAtRoot_));
3137	setPointers(solver_);
3138	numberFixedNow_ = numberFixedAtRoot_;
3139	} else if (numberFixedAtRoot_ < 0) {
3140	COIN_DETAIL_PRINT(printf("analysis found to be infeasible\n"));
3141	anyAction = -2;
3142	delete newNode ;
3143	newNode = NULL ;
3144	feasible = false ;
3145	}
3146	}
3147	OsiSolverBranch * branches = NULL;
3148	anyAction = chooseBranch(newNode, numberPassesLeft, NULL, cuts, resolved,
3149	NULL, NULL, NULL, branches);
3150	if (anyAction == -2 \|\| newNode->objectiveValue() >= cutoff) {
3151	if (anyAction != -2) {
3152	// zap parent nodeInfo
3153	#ifdef COIN_DEVELOP
3154	printf("zapping CbcNodeInfo %x\n", reinterpret_cast<int>(newNode->nodeInfo()->parent()));
3155	#endif
3156	if (newNode->nodeInfo())
3157	newNode->nodeInfo()->nullParent();
3158	}
3159	delete newNode ;
3160	newNode = NULL ;
3161	feasible = false ;
3162	}
3163	}
3164	if (newNode && probingInfo_) {
3165	int number01 = probingInfo_->numberIntegers();
3166	//const fixEntry * entry = probingInfo_->fixEntries();
3167	const int * toZero = probingInfo_->toZero();
3168	//const int * toOne = probingInfo_->toOne();
3169	//const int * integerVariable = probingInfo_->integerVariable();
3170	if (toZero[number01]) {
3171	CglTreeProbingInfo info(*probingInfo_);
3172	#ifdef JJF_ZERO
3173	/*
3174	Marginal idea. Further exploration probably good. Build some extra
3175	cliques from probing info. Not quite worth the effort?
3176	*/
3177	OsiSolverInterface * fake = info.analyze(*solver_, 1);
3178	if (fake) {
3179	fake->writeMps("fake");
3180	CglFakeClique cliqueGen(fake);
3181	cliqueGen.setStarCliqueReport(false);
3182	cliqueGen.setRowCliqueReport(false);
3183	cliqueGen.setMinViolation(0.1);
3184	addCutGenerator(&cliqueGen, 1, "Fake cliques", true, false, false, -200);
3185	generator_[numberCutGenerators_-1]->setTiming(true);
3186	}
3187	#endif
3188	if (probingInfo_->packDown()) {
3189	#ifdef CLP_INVESTIGATE
3190	printf("%d implications on %d 0-1\n", toZero[number01], number01);
3191	#endif
3192	// Create a cut generator that remembers implications discovered at root.
3193	CglImplication implication(probingInfo_);
3194	addCutGenerator(&implication, 1, "ImplicationCuts", true, false, false, -200);
3195	} else {
3196	delete probingInfo_;
3197	probingInfo_ = NULL;
3198	}
3199	} else {
3200	delete probingInfo_;
3201
3202	probingInfo_ = NULL;
3203	}
3204	}
3205	/*
3206	At this point, the root subproblem is infeasible or fathomed by bound
3207	(newNode == NULL), or we're live with an objective value that satisfies the
3208	current objective cutoff.
3209	*/
3210	assert (!newNode \|\| newNode->objectiveValue() <= cutoff) ;
3211	// Save address of root node as we don't want to delete it
3212	// initialize for print out
3213	int lastDepth = 0;
3214	int lastUnsatisfied = 0;
3215	if (newNode)
3216	lastUnsatisfied = newNode->numberUnsatisfied();
3217	/*
3218	The common case is that the lp relaxation is feasible but doesn't satisfy
3219	integrality (i.e., newNode->branchingObject(), indicating we've been able to
3220	select a branching variable). Remove any cuts that have gone slack due to
3221	forcing monotone variables. Then tack on an CbcFullNodeInfo object and full
3222	basis (via createInfo()) and stash the new cuts in the nodeInfo (via
3223	addCuts()). If, by some miracle, we have an integral solution at the root
3224	(newNode->branchingObject() is NULL), takeOffCuts() will ensure that the solver holds
3225	a valid solution for use by setBestSolution().
3226	*/
3227	CoinWarmStartBasis *lastws = NULL ;
3228	if (feasible && newNode->branchingObject()) {
3229	if (resolved) {
3230	takeOffCuts(cuts, false, NULL) ;
3231	# ifdef CHECK_CUT_COUNTS
3232	{ printf("Number of rows after chooseBranch fix (root)"
3233	"(active only) %d\n",
3234	numberRowsAtContinuous_ + numberNewCuts_ + numberOldActiveCuts_) ;
3235	const CoinWarmStartBasis* debugws =
3236	dynamic_cast <const CoinWarmStartBasis*>(solver_->getWarmStart()) ;
3237	debugws->print() ;
3238	delete debugws ;
3239	}
3240	# endif
3241	}
3242	//newNode->createInfo(this,NULL,NULL,NULL,NULL,0,0) ;
3243	//newNode->nodeInfo()->addCuts(cuts,
3244	// newNode->numberBranches(),whichGenerator_) ;
3245	if (lastws) delete lastws ;
3246	lastws = dynamic_cast<CoinWarmStartBasis*>(solver_->getWarmStart()) ;
3247	}
3248	/*
3249	Continuous data to be used later
3250	*/
3251	continuousObjective_ = solver_->getObjValue() * solver_->getObjSense();
3252	continuousInfeasibilities_ = 0 ;
3253	if (newNode) {
3254	continuousObjective_ = newNode->objectiveValue() ;
3255	delete [] continuousSolution_;
3256	continuousSolution_ = CoinCopyOfArray(solver_->getColSolution(),
3257	numberColumns);
3258	continuousInfeasibilities_ = newNode->numberUnsatisfied() ;
3259	}
3260	/*
3261	Bound may have changed so reset in objects
3262	*/
3263	{
3264	int i ;
3265	for (i = 0; i < numberObjects_; i++)
3266	object_[i]->resetBounds(solver_) ;
3267	}
3268	/*
3269	Feasible? Then we should have either a live node prepped for future
3270	expansion (indicated by variable() >= 0), or (miracle of miracles) an
3271	integral solution at the root node.
3272
3273	initializeInfo sets the reference counts in the nodeInfo object. Since
3274	this node is still live, push it onto the heap that holds the live set.
3275	*/
3276	double bestValue = 0.0 ;
3277	if (newNode) {
3278	bestValue = newNode->objectiveValue();
3279	if (newNode->branchingObject()) {
3280	newNode->initializeInfo() ;
3281	tree_->push(newNode) ;
3282	if (statistics_) {
3283	if (numberNodes2_ == maximumStatistics_) {
3284	maximumStatistics_ = 2 * maximumStatistics_;
3285	CbcStatistics ** temp = new CbcStatistics * [maximumStatistics_];
3286	memset(temp, 0, maximumStatistics_sizeof(CbcStatistics ));
3287	memcpy(temp, statistics_, numberNodes2_sizeof(CbcStatistics ));
3288	delete [] statistics_;
3289	statistics_ = temp;
3290	}
3291	assert (!statistics_[numberNodes2_]);
3292	statistics_[numberNodes2_] = new CbcStatistics(newNode, this);
3293	}
3294	numberNodes2_++;
3295	# ifdef CHECK_NODE
3296	printf("Node %x on tree\n", newNode) ;
3297	# endif
3298	} else {
3299	// continuous is integer
3300	double objectiveValue = newNode->objectiveValue();
3301	setBestSolution(CBC_SOLUTION, objectiveValue,
3302	solver_->getColSolution()) ;
3303	delete newNode ;
3304	newNode = NULL ;
3305	}
3306	}
3307
3308	if (printFrequency_ <= 0) {
3309	printFrequency_ = 1000 ;
3310	if (getNumCols() > 2000)
3311	printFrequency_ = 100 ;
3312	}
3313	/*
3314	It is possible that strong branching fixes one variable and then the code goes round
3315	again and again. This can take too long. So we need to warn user - just once.
3316	*/
3317	numberLongStrong_ = 0;
3318	CbcNode * createdNode = NULL;
3319	#ifdef CBC_THREAD
3320	if ((specialOptions_&2048) != 0)
3321	numberThreads_ = 0;
3322	if (numberThreads_ ) {
3323	nodeCompare_->sayThreaded(); // need to use addresses
3324	master_ = new CbcBaseModel(*this,
3325	(parallelMode() < -1) ? 1 : 0);
3326	masterThread_ = master_->masterThread();
3327	}
3328	#endif
3329	#ifdef COIN_HAS_CLP
3330	{
3331	OsiClpSolverInterface * clpSolver
3332	= dynamic_cast<OsiClpSolverInterface *> (solver_);
3333	if (clpSolver && !parentModel_) {
3334	clpSolver->computeLargestAway();
3335	}
3336	}
3337	#endif
3338	/*
3339	At last, the actual branch-and-cut search loop, which will iterate until
3340	the live set is empty or we hit some limit (integrality gap, time, node
3341	count, etc.). The overall flow is to rebuild a subproblem, reoptimise using
3342	solveWithCuts(), choose a branching pattern with chooseBranch(), and finally
3343	add the node to the live set.
3344
3345	The first action is to winnow the live set to remove nodes which are worse
3346	than the current objective cutoff.
3347	*/
3348	if (solver_->getRowCutDebuggerAlways()) {
3349	OsiRowCutDebugger * debuggerX = const_cast<OsiRowCutDebugger *> (solver_->getRowCutDebuggerAlways());
3350	const OsiRowCutDebugger *debugger = solver_->getRowCutDebugger() ;
3351	if (!debugger) {
3352	// infeasible!!
3353	printf("before search\n");
3354	const double * lower = solver_->getColLower();
3355	const double * upper = solver_->getColUpper();
3356	const double * solution = debuggerX->optimalSolution();
3357	int numberColumns = solver_->getNumCols();
3358	for (int i = 0; i < numberColumns; i++) {
3359	if (solver_->isInteger(i)) {
3360	if (solution[i] < lower[i] - 1.0e-6 \|\| solution[i] > upper[i] + 1.0e-6)
3361	printf("**** ");
3362	printf("%d %g <= %g <= %g\n",
3363	i, lower[i], solution[i], upper[i]);
3364	}
3365	}
3366	//abort();
3367	}
3368	}
3369	{
3370	// may be able to change cutoff now
3371	double cutoff = getCutoff();
3372	double increment = getDblParam(CbcModel::CbcCutoffIncrement) ;
3373	if (cutoff > bestObjective_ - increment) {
3374	cutoff = bestObjective_ - increment ;
3375	setCutoff(cutoff) ;
3376	}
3377	}
3378	#ifdef CBC_THREAD
3379	bool goneParallel = false;
3380	#endif
3381	#define MAX_DEL_NODE 1
3382	CbcNode * delNode[MAX_DEL_NODE+1];
3383	int nDeleteNode = 0;
3384	// For Printing etc when parallel
3385	int lastEvery1000 = 0;
3386	int lastPrintEvery = 0;
3387	int numberConsecutiveInfeasible = 0;
3388	#define PERTURB_IN_FATHOM
3389	#ifdef PERTURB_IN_FATHOM
3390	// allow in fathom
3391	if ((moreSpecialOptions_& 262144) != 0)
3392	specialOptions_ \|= 131072;
3393	#endif
3394	while (true) {
3395	lockThread();
3396	#ifdef COIN_HAS_CLP
3397	// See if we want dantzig row choice
3398	goToDantzig(100, savePivotMethod);
3399	#endif
3400	if (tree_->empty()) {
3401	#ifdef CBC_THREAD
3402	if (parallelMode() > 0 && master_) {
3403	int anyLeft = master_->waitForThreadsInTree(0);
3404	if (!anyLeft) {
3405	master_->stopThreads(-1);
3406	break;
3407	}
3408	} else {
3409	break;
3410	}
3411	#else
3412	break;
3413	#endif
3414	} else {
3415	unlockThread();
3416	}
3417	// If done 100 nodes see if worth trying reduction
3418	if (numberNodes_ == 50 \|\| numberNodes_ == 100) {
3419	#ifdef COIN_HAS_CLP
3420	OsiClpSolverInterface * clpSolver
3421	= dynamic_cast<OsiClpSolverInterface *> (solver_);
3422	if (clpSolver && ((specialOptions_&131072) == 0) && true) {
3423	ClpSimplex * simplex = clpSolver->getModelPtr();
3424	int perturbation = simplex->perturbation();
3425	#ifdef CLP_INVESTIGATE
3426	printf("Testing its n,s %d %d solves n,s %d %d - pert %d\n",
3427	numberIterations_, saveNumberIterations,
3428	numberSolves_, saveNumberSolves, perturbation);
3429	#endif
3430	if (perturbation == 50 && (numberIterations_ - saveNumberIterations) <
3431	8*(numberSolves_ - saveNumberSolves)) {
3432	// switch off perturbation
3433	simplex->setPerturbation(100);
3434	#ifdef CLP_INVESTIGATE
3435	printf("Perturbation switched off\n");
3436	#endif
3437	}
3438	}
3439	#endif
3440	/*
3441	Decide if we want to do a restart.
3442	*/
3443	if (saveSolver) {
3444	bool tryNewSearch = solverCharacteristics_->reducedCostsAccurate() &&
3445	(getCutoff() < 1.0e20 && getCutoff() < checkCutoffForRestart);
3446	int numberColumns = getNumCols();
3447	if (tryNewSearch) {
3448	checkCutoffForRestart = getCutoff() ;
3449	#ifdef CLP_INVESTIGATE
3450	printf("after %d nodes, cutoff %g - looking\n",
3451	numberNodes_, getCutoff());
3452	#endif
3453	saveSolver->resolve();
3454	double direction = saveSolver->getObjSense() ;
3455	double gap = checkCutoffForRestart - saveSolver->getObjValue() * direction ;
3456	double tolerance;
3457	saveSolver->getDblParam(OsiDualTolerance, tolerance) ;
3458	if (gap <= 0.0)
3459	gap = tolerance;
3460	gap += 100.0 * tolerance;
3461	double integerTolerance = getDblParam(CbcIntegerTolerance) ;
3462
3463	const double *lower = saveSolver->getColLower() ;
3464	const double *upper = saveSolver->getColUpper() ;
3465	const double *solution = saveSolver->getColSolution() ;
3466	const double *reducedCost = saveSolver->getReducedCost() ;
3467
3468	int numberFixed = 0 ;
3469	int numberFixed2 = 0;
3470	#ifdef COIN_DEVELOP
3471	printf("gap %g\n", gap);
3472	#endif
3473	for (int i = 0 ; i < numberIntegers_ ; i++) {
3474	int iColumn = integerVariable_[i] ;
3475	double djValue = direction * reducedCost[iColumn] ;
3476	if (upper[iColumn] - lower[iColumn] > integerTolerance) {
3477	if (solution[iColumn] < lower[iColumn] + integerTolerance && djValue > gap) {
3478	//printf("%d to lb on dj of %g - bounds %g %g\n",
3479	// iColumn,djValue,lower[iColumn],upper[iColumn]);
3480	saveSolver->setColUpper(iColumn, lower[iColumn]) ;
3481	numberFixed++ ;
3482	} else if (solution[iColumn] > upper[iColumn] - integerTolerance && -djValue > gap) {
3483	//printf("%d to ub on dj of %g - bounds %g %g\n",
3484	// iColumn,djValue,lower[iColumn],upper[iColumn]);
3485	saveSolver->setColLower(iColumn, upper[iColumn]) ;
3486	numberFixed++ ;
3487	}
3488	} else {
3489	//printf("%d has dj of %g - already fixed to %g\n",
3490	// iColumn,djValue,lower[iColumn]);
3491	numberFixed2++;
3492	}
3493	}
3494	#ifdef COIN_DEVELOP
3495	if ((specialOptions_&1) != 0) {
3496	const OsiRowCutDebugger *debugger = saveSolver->getRowCutDebugger() ;
3497	if (debugger) {
3498	printf("Contains optimal\n") ;
3499	OsiSolverInterface * temp = saveSolver->clone();
3500	const double * solution = debugger->optimalSolution();
3501	const double *lower = temp->getColLower() ;
3502	const double *upper = temp->getColUpper() ;
3503	int n = temp->getNumCols();
3504	for (int i = 0; i < n; i++) {
3505	if (temp->isInteger(i)) {
3506	double value = floor(solution[i] + 0.5);
3507	assert (value >= lower[i] && value <= upper[i]);
3508	temp->setColLower(i, value);
3509	temp->setColUpper(i, value);
3510	}
3511	}
3512	temp->writeMps("reduced_fix");
3513	delete temp;
3514	saveSolver->writeMps("reduced");
3515	} else {
3516	abort();
3517	}
3518	}
3519	printf("Restart could fix %d integers (%d already fixed)\n",
3520	numberFixed + numberFixed2, numberFixed2);
3521	#endif
3522	numberFixed += numberFixed2;
3523	if (numberFixed10 < numberColumns && numberFixed4 < numberIntegers_)
3524	tryNewSearch = false;
3525	}
3526	if (tryNewSearch) {
3527	// back to solver without cuts?
3528	OsiSolverInterface * solver2 = saveSolver->clone();
3529	const double *lower = saveSolver->getColLower() ;
3530	const double *upper = saveSolver->getColUpper() ;
3531	for (int i = 0 ; i < numberIntegers_ ; i++) {
3532	int iColumn = integerVariable_[i] ;
3533	solver2->setColLower(iColumn, lower[iColumn]);
3534	solver2->setColUpper(iColumn, upper[iColumn]);
3535	}
3536	// swap
3537	delete saveSolver;
3538	saveSolver = solver2;
3539	double * newSolution = new double[numberColumns];
3540	double objectiveValue = checkCutoffForRestart;
3541	// Save the best solution so far.
3542	CbcSerendipity heuristic(*this);
3543	if (bestSolution_)
3544	heuristic.setInputSolution(bestSolution_, bestObjective_);
3545	// Magic number
3546	heuristic.setFractionSmall(0.8);
3547	// `pumpTune' to stand-alone solver for explanations.
3548	heuristic.setFeasibilityPumpOptions(1008013);
3549	// Use numberNodes to say how many are original rows
3550	heuristic.setNumberNodes(continuousSolver_->getNumRows());
3551	#ifdef COIN_DEVELOP
3552	if (continuousSolver_->getNumRows() <
3553	solver_->getNumRows())
3554	printf("%d rows added ZZZZZ\n",
3555	solver_->getNumRows() - continuousSolver_->getNumRows());
3556	#endif
3557	int returnCode = heuristic.smallBranchAndBound(saveSolver,
3558	-1, newSolution,
3559	objectiveValue,
3560	checkCutoffForRestart, "Reduce");
3561	if (returnCode < 0) {
3562	#ifdef COIN_DEVELOP
3563	printf("Restart - not small enough to do search after fixing\n");
3564	#endif
3565	delete [] newSolution;
3566	} else {
3567	// 1 for sol'n, 2 for finished, 3 for both
3568	if ((returnCode&1) != 0) {
3569	// increment number of solutions so other heuristics can test
3570	numberSolutions_++;
3571	numberHeuristicSolutions_++;
3572	lastHeuristic_ = NULL;
3573	setBestSolution(CBC_ROUNDING, objectiveValue, newSolution) ;
3574	}
3575	delete [] newSolution;
3576	#ifdef CBC_THREAD
3577	if (master_) {
3578	lockThread();
3579	if (parallelMode() > 0) {
3580	while (master_->waitForThreadsInTree(0)) {
3581	lockThread();
3582	double dummyBest;
3583	tree_->cleanTree(this, -COIN_DBL_MAX, dummyBest) ;
3584	//unlockThread();
3585	}
3586	} else {
3587	double dummyBest;
3588	tree_->cleanTree(this, -COIN_DBL_MAX, dummyBest) ;
3589	}
3590	master_->waitForThreadsInTree(2);
3591	delete master_;
3592	master_ = NULL;
3593	masterThread_ = NULL;
3594	}
3595	#endif
3596	if (tree_->size()) {
3597	double dummyBest;
3598	tree_->cleanTree(this, -COIN_DBL_MAX, dummyBest) ;
3599	}
3600	break;
3601	}
3602	}
3603	delete saveSolver;
3604	saveSolver = NULL;
3605	}
3606	}
3607	/*
3608	Check for abort on limits: node count, solution count, time, integrality gap.
3609	*/
3610	if (!(numberNodes_ < intParam_[CbcMaxNumNode] &&
3611	numberSolutions_ < intParam_[CbcMaxNumSol] &&
3612	!maximumSecondsReached() &&
3613	!stoppedOnGap_ && !eventHappened_ && (maximumNumberIterations_ < 0 \|\|
3614	numberIterations_ < maximumNumberIterations_))) {
3615	// out of loop
3616	break;
3617	}
3618	#ifdef BONMIN
3619	assert(!solverCharacteristics_->solutionAddsCuts() \|\| solverCharacteristics_->mipFeasible());
3620	#endif
3621	// Sets percentage of time when we try diving. Diving requires a bit of heap reorganisation, because
3622	// we need to replace the comparison function to dive, and that requires reordering to retain the
3623	// heap property.
3624	#define DIVE_WHEN 1000
3625	#define DIVE_STOP 2000
3626	int kNode = numberNodes_ % 4000;
3627	if (numberNodes_<100000 && kNode>DIVE_WHEN && kNode <= DIVE_STOP) {
3628	if (!parallelMode()) {
3629	if (kNode == DIVE_WHEN + 1 \|\| numberConsecutiveInfeasible > 1) {
3630	CbcCompareDefault * compare = dynamic_cast<CbcCompareDefault *>
3631	(nodeCompare_);
3632	// Don't interfere if user has replaced the compare function.
3633	if (compare) {
3634	//printf("Redoing tree\n");
3635	compare->startDive(this);
3636	numberConsecutiveInfeasible = 0;
3637	}
3638	}
3639	}
3640	}
3641	// replace current cutoff?
3642	if (cutoff > getCutoff()) {
3643	double newCutoff = getCutoff();
3644	if (analyzeResults_) {
3645	// see if we could fix any (more)
3646	int n = 0;
3647	double * newLower = analyzeResults_;
3648	double * objLower = newLower + numberIntegers_;
3649	double * newUpper = objLower + numberIntegers_;
3650	double * objUpper = newUpper + numberIntegers_;
3651	for (int i = 0; i < numberIntegers_; i++) {
3652	if (objLower[i] > newCutoff) {
3653	n++;
3654	if (objUpper[i] > newCutoff) {
3655	newCutoff = -COIN_DBL_MAX;
3656	break;
3657	}
3658	} else if (objUpper[i] > newCutoff) {
3659	n++;
3660	}
3661	}
3662	if (newCutoff == -COIN_DBL_MAX) {
3663	COIN_DETAIL_PRINT(printf("Root analysis says finished\n"));
3664	} else if (n > numberFixedNow_) {
3665	COIN_DETAIL_PRINT(printf("%d more fixed by analysis - now %d\n", n - numberFixedNow_, n));
3666	numberFixedNow_ = n;
3667	}
3668	}
3669	if (eventHandler) {
3670	if (!eventHandler->event(CbcEventHandler::solution)) {
3671	eventHappened_ = true; // exit
3672	}
3673	newCutoff = getCutoff();
3674	}
3675	lockThread();
3676	/*
3677	Clean the tree to reflect the new solution, then see if the
3678	node comparison predicate wants to make any changes. If so,
3679	call setComparison for the side effect of rebuilding the heap.
3680	*/
3681	tree_->cleanTree(this,newCutoff,bestPossibleObjective_) ;
3682	if (nodeCompare_->newSolution(this) \|\|
3683	nodeCompare_->newSolution(this,continuousObjective_,
3684	continuousInfeasibilities_)) {
3685	tree_->setComparison(*nodeCompare_) ;
3686	}
3687	if (tree_->empty()) {
3688	continue;
3689	}
3690	unlockThread();
3691	}
3692	cutoff = getCutoff() ;
3693	/*
3694	Periodic activities: Opportunities to
3695	+ tweak the nodeCompare criteria,
3696	+ check if we've closed the integrality gap enough to quit,
3697	+ print a summary line to let the user know we're working
3698	*/
3699	if (numberNodes_ >= lastEvery1000) {
3700	lockThread();
3701	#ifdef COIN_HAS_CLP
3702	// See if we want dantzig row choice
3703	goToDantzig(1000, savePivotMethod);
3704	#endif
3705	lastEvery1000 = numberNodes_ + 1000;
3706	bool redoTree = nodeCompare_->every1000Nodes(this, numberNodes_) ;
3707	#ifdef CHECK_CUT_SIZE
3708	verifyCutSize (tree_, *this);
3709	#endif
3710	// redo tree if requested
3711	if (redoTree)
3712	tree_->setComparison(*nodeCompare_) ;
3713	unlockThread();
3714	}
3715	// Had hotstart before, now switched off
3716	if (saveCompare && !hotstartSolution_) {
3717	// hotstart switched off
3718	delete nodeCompare_; // off depth first
3719	nodeCompare_ = saveCompare;
3720	saveCompare = NULL;
3721	// redo tree
3722	lockThread();
3723	tree_->setComparison(*nodeCompare_) ;
3724	unlockThread();
3725	}
3726	if (numberNodes_ >= lastPrintEvery) {
3727	lastPrintEvery = numberNodes_ + printFrequency_;
3728	lockThread();
3729	int nNodes = tree_->size() ;
3730
3731	//MODIF PIERRE
3732	bestPossibleObjective_ = tree_->getBestPossibleObjective();
3733	unlockThread();
3734	#ifdef CLP_INVESTIGATE
3735	if (getCutoff() < 1.0e20) {
3736	if (fabs(getCutoff() - (bestObjective_ - getCutoffIncrement())) > 1.0e-6 &&
3737	!parentModel_)
3738	printf("model cutoff in status %g, best %g, increment %g\n",
3739	getCutoff(), bestObjective_, getCutoffIncrement());
3740	assert (getCutoff() < bestObjective_ - getCutoffIncrement() +
3741	1.0e-6 + 1.0e-10*fabs(bestObjective_));
3742	}
3743	#endif
3744	if (!intParam_[CbcPrinting]) {
3745	messageHandler()->message(CBC_STATUS, messages())
3746	<< numberNodes_ << nNodes << bestObjective_ << bestPossibleObjective_
3747	<< getCurrentSeconds()
3748	<< CoinMessageEol ;
3749	} else if (intParam_[CbcPrinting] == 1) {
3750	messageHandler()->message(CBC_STATUS2, messages())
3751	<< numberNodes_ << nNodes << bestObjective_ << bestPossibleObjective_
3752	<< lastDepth << lastUnsatisfied << numberIterations_
3753	<< getCurrentSeconds()
3754	<< CoinMessageEol ;
3755	} else if (!numberExtraIterations_) {
3756	messageHandler()->message(CBC_STATUS2, messages())
3757	<< numberNodes_ << nNodes << bestObjective_ << bestPossibleObjective_
3758	<< lastDepth << lastUnsatisfied << numberIterations_
3759	<< getCurrentSeconds()
3760	<< CoinMessageEol ;
3761	} else {
3762	messageHandler()->message(CBC_STATUS3, messages())
3763	<< numberNodes_ << numberExtraNodes_ << nNodes << bestObjective_ << bestPossibleObjective_
3764	<< lastDepth << lastUnsatisfied << numberIterations_ << numberExtraIterations_
3765	<< getCurrentSeconds()
3766	<< CoinMessageEol ;
3767	}
3768	if (eventHandler && !eventHandler->event(CbcEventHandler::treeStatus)) {
3769	eventHappened_ = true; // exit
3770	}
3771	}
3772	// See if can stop on gap
3773	if(canStopOnGap()) {
3774	stoppedOnGap_ = true ;
3775	}
3776
3777	#ifdef CHECK_NODE_FULL
3778	verifyTreeNodes(tree_, *this) ;
3779	# endif
3780	# ifdef CHECK_CUT_COUNTS
3781	verifyCutCounts(tree_, *this) ;
3782	# endif
3783	/*
3784	Now we come to the meat of the loop. To create the active subproblem, we'll
3785	pop the most promising node in the live set, rebuild the subproblem it
3786	represents, and then execute the current arm of the branch to create the
3787	active subproblem.
3788	*/
3789	CbcNode * node = NULL;
3790	#ifdef CBC_THREAD
3791	if (!parallelMode() \|\| parallelMode() == -1) {
3792	#endif
3793	node = tree_->bestNode(cutoff) ;
3794	// Possible one on tree worse than cutoff
3795	// Weird comparison function can leave ineligible nodes on tree
3796	if (!node \|\| node->objectiveValue() > cutoff)
3797	continue;
3798	// Do main work of solving node here
3799	doOneNode(this, node, createdNode);
3800	#ifdef JJF_ZERO
3801	if (node) {
3802	if (createdNode) {
3803	printf("Node %d depth %d, created %d depth %d\n",
3804	node->nodeNumber(), node->depth(),
3805	createdNode->nodeNumber(), createdNode->depth());
3806	} else {
3807	printf("Node %d depth %d, no created node\n",
3808	node->nodeNumber(), node->depth());
3809	}
3810	} else if (createdNode) {
3811	printf("Node exhausted, created %d depth %d\n",
3812	createdNode->nodeNumber(), createdNode->depth());
3813	} else {
3814	printf("Node exhausted, no created node\n");
3815	numberConsecutiveInfeasible = 2;
3816	}
3817	#endif
3818	//if (createdNode)
3819	//numberConsecutiveInfeasible=0;
3820	//else
3821	//numberConsecutiveInfeasible++;
3822	#ifdef CBC_THREAD
3823	} else if (parallelMode() > 0) {
3824	//lockThread();
3825	//node = tree_->bestNode(cutoff) ;
3826	// Possible one on tree worse than cutoff
3827	if (true \|\| !node \|\| node->objectiveValue() > cutoff) {
3828	assert (master_);
3829	if (master_) {
3830	int anyLeft = master_->waitForThreadsInTree(1);
3831	// may need to go round again
3832	if (anyLeft) {
3833	continue;
3834	} else {
3835	master_->stopThreads(-1);
3836	}
3837	}
3838	}
3839	//unlockThread();
3840	} else {
3841	// Deterministic parallel
3842	if (tree_->size() < CoinMax(numberThreads_, 8) && !goneParallel) {
3843	node = tree_->bestNode(cutoff) ;
3844	// Possible one on tree worse than cutoff
3845	if (!node \|\| node->objectiveValue() > cutoff)
3846	continue;
3847	// Do main work of solving node here
3848	doOneNode(this, node, createdNode);
3849	assert (createdNode);
3850	if (!createdNode->active()) {
3851	delete createdNode;
3852	createdNode = NULL;
3853	} else {
3854	// Say one more pointing to this
3855	node->nodeInfo()->increment() ;
3856	tree_->push(createdNode) ;
3857	}
3858	if (node->active()) {
3859	assert (node->nodeInfo());
3860	if (node->nodeInfo()->numberBranchesLeft()) {
3861	tree_->push(node) ;
3862	} else {
3863	node->setActive(false);
3864	}
3865	} else {
3866	if (node->nodeInfo()) {
3867	if (!node->nodeInfo()->numberBranchesLeft())
3868	node->nodeInfo()->allBranchesGone(); // can clean up
3869	// So will delete underlying stuff
3870	node->setActive(true);
3871	}
3872	delNode[nDeleteNode++] = node;
3873	node = NULL;
3874	}
3875	if (nDeleteNode >= MAX_DEL_NODE) {
3876	for (int i = 0; i < nDeleteNode; i++) {
3877	//printf("trying to del %d %x\n",i,delNode[i]);
3878	delete delNode[i];
3879	//printf("done to del %d %x\n",i,delNode[i]);
3880	}
3881	nDeleteNode = 0;
3882	}
3883	} else {
3884	// Split and solve
3885	master_->deterministicParallel();
3886	goneParallel = true;
3887	}
3888	}
3889	#endif
3890	}
3891	if (nDeleteNode) {
3892	for (int i = 0; i < nDeleteNode; i++) {
3893	delete delNode[i];
3894	}
3895	nDeleteNode = 0;
3896	}
3897	#ifdef CBC_THREAD
3898	if (master_) {
3899	master_->stopThreads(-1);
3900	master_->waitForThreadsInTree(2);
3901	delete master_;
3902	master_ = NULL;
3903	masterThread_ = NULL;
3904	// adjust time to allow for children on some systems
3905	//dblParam_[CbcStartSeconds] -= CoinCpuTimeJustChildren();
3906	}
3907	#endif
3908	/*
3909	End of the non-abort actions. The next block of code is executed if we've
3910	aborted because we hit one of the limits. Clean up by deleting the live set
3911	and break out of the node processing loop. Note that on an abort, node may
3912	have been pushed back onto the tree for further processing, in which case
3913	it'll be deleted in cleanTree. We need to check.
3914	*/
3915	if (!(numberNodes_ < intParam_[CbcMaxNumNode] &&
3916	numberSolutions_ < intParam_[CbcMaxNumSol] &&
3917	!maximumSecondsReached() &&
3918	!stoppedOnGap_ &&
3919	!eventHappened_ &&
3920	(maximumNumberIterations_ < 0 \|\| numberIterations_ < maximumNumberIterations_))
3921	) {
3922	if (tree_->size()) {
3923	double dummyBest;
3924	tree_->cleanTree(this, -COIN_DBL_MAX, dummyBest) ;
3925	}
3926	delete nextRowCut_;
3927	/* order is important here:
3928	* maximumSecondsReached() should be checked before eventHappened_ and
3929	* isNodeLimitReached() should be checked after eventHappened_
3930	* reason is, that at timelimit, eventHappened_ is set to true to make Cbc stop fast
3931	* and if Ctrl+C is hit, then the nodelimit is set to -1 to make Cbc stop
3932	*/
3933	if (stoppedOnGap_) {
3934	messageHandler()->message(CBC_GAP, messages())
3935	<< bestObjective_ - bestPossibleObjective_
3936	<< dblParam_[CbcAllowableGap]
3937	<< dblParam_[CbcAllowableFractionGap]*100.0
3938	<< CoinMessageEol ;
3939	secondaryStatus_ = 2;
3940	status_ = 0 ;
3941	} else if (maximumSecondsReached()) {
3942	handler_->message(CBC_MAXTIME, messages_) << CoinMessageEol ;
3943	secondaryStatus_ = 4;
3944	status_ = 1 ;
3945	} else if (eventHappened_) {
3946	handler_->message(CBC_EVENT, messages_) << CoinMessageEol ;
3947	secondaryStatus_ = 5;
3948	status_ = 5 ;
3949	} else if (isNodeLimitReached()) {
3950	handler_->message(CBC_MAXNODES, messages_) << CoinMessageEol ;
3951	secondaryStatus_ = 3;
3952	status_ = 1 ;
3953	} else if (maximumNumberIterations_ >= 0 && numberIterations_ >= maximumNumberIterations_) {
3954	handler_->message(CBC_MAXITERS, messages_) << CoinMessageEol ;
3955	secondaryStatus_ = 8;
3956	status_ = 1 ;
3957	} else {
3958	assert(numberSolutions_ >= intParam_[CbcMaxNumSol]);
3959	handler_->message(CBC_MAXSOLS, messages_) << CoinMessageEol ;
3960	secondaryStatus_ = 6;
3961	status_ = 1 ;
3962	}
3963	}
3964	/*
3965	That's it, we've exhausted the search tree, or broken out of the loop because
3966	we hit some limit on evaluation.
3967
3968	We may have got an intelligent tree so give it one more chance
3969	*/
3970	// Tell solver we are not in Branch and Cut
3971	solver_->setHintParam(OsiDoInBranchAndCut, false, OsiHintDo, NULL) ;
3972	tree_->endSearch();
3973	// If we did any sub trees - did we give up on any?
3974	if ( numberStoppedSubTrees_)
3975	status_ = 1;
3976	numberNodes_ += numberExtraNodes_;
3977	numberIterations_ += numberExtraIterations_;
3978	if (eventHandler) {
3979	eventHandler->event(CbcEventHandler::endSearch);
3980	}
3981	if (!status_) {
3982	// Set best possible unless stopped on gap
3983	if (secondaryStatus_ != 2)
3984	bestPossibleObjective_ = bestObjective_;
3985	handler_->message(CBC_END_GOOD, messages_)
3986	<< bestObjective_ << numberIterations_ << numberNodes_ << getCurrentSeconds()
3987	<< CoinMessageEol ;
3988	} else {
3989	handler_->message(CBC_END, messages_)
3990	<< bestObjective_ << bestPossibleObjective_
3991	<< numberIterations_ << numberNodes_ << getCurrentSeconds()
3992	<< CoinMessageEol ;
3993	}
3994	if (numberStrongIterations_)
3995	handler_->message(CBC_STRONG_STATS, messages_)
3996	<< strongInfo_[0] << numberStrongIterations_ << strongInfo_[2]
3997	<< strongInfo_[1] << CoinMessageEol ;
3998	if (!numberExtraNodes_)
3999	handler_->message(CBC_OTHER_STATS, messages_)
4000	<< maximumDepthActual_
4001	<< numberDJFixed_ << CoinMessageEol ;
4002	else
4003	handler_->message(CBC_OTHER_STATS2, messages_)
4004	<< maximumDepthActual_
4005	<< numberDJFixed_ << numberExtraNodes_ << numberExtraIterations_
4006	<< CoinMessageEol ;
4007	if (doStatistics == 100) {
4008	for (int i = 0; i < numberObjects_; i++) {
4009	CbcSimpleIntegerDynamicPseudoCost * obj =
4010	dynamic_cast <CbcSimpleIntegerDynamicPseudoCost *>(object_[i]) ;
4011	if (obj)
4012	obj->print();
4013	}
4014	}
4015	if (statistics_) {
4016	// report in some way
4017	int * lookup = new int[numberObjects_];
4018	int i;
4019	for (i = 0; i < numberObjects_; i++)
4020	lookup[i] = -1;
4021	bool goodIds = false; //true;
4022	for (i = 0; i < numberObjects_; i++) {
4023	int iColumn = object_[i]->columnNumber();
4024	if (iColumn >= 0 && iColumn < numberColumns) {
4025	if (lookup[i] == -1) {
4026	lookup[i] = iColumn;
4027	} else {
4028	goodIds = false;
4029	break;
4030	}
4031	} else {
4032	goodIds = false;
4033	break;
4034	}
4035	}
4036	if (!goodIds) {
4037	delete [] lookup;
4038	lookup = NULL;
4039	}
4040	if (doStatistics >= 3) {
4041	printf(" node parent depth column value obj inf\n");
4042	for ( i = 0; i < numberNodes2_; i++) {
4043	statistics_[i]->print(lookup);
4044	}
4045	}
4046	if (doStatistics > 1) {
4047	// Find last solution
4048	int k;
4049	for (k = numberNodes2_ - 1; k >= 0; k--) {
4050	if (statistics_[k]->endingObjective() != COIN_DBL_MAX &&
4051	!statistics_[k]->endingInfeasibility())
4052	break;
4053	}
4054	if (k >= 0) {
4055	int depth = statistics_[k]->depth();
4056	int * which = new int[depth+1];
4057	for (i = depth; i >= 0; i--) {
4058	which[i] = k;
4059	k = statistics_[k]->parentNode();
4060	}
4061	printf(" node parent depth column value obj inf\n");
4062	for (i = 0; i <= depth; i++) {
4063	statistics_[which[i]]->print(lookup);
4064	}
4065	delete [] which;
4066	}
4067	}
4068	// now summary
4069	int maxDepth = 0;
4070	double averageSolutionDepth = 0.0;
4071	int numberSolutions = 0;
4072	double averageCutoffDepth = 0.0;
4073	double averageSolvedDepth = 0.0;
4074	int numberCutoff = 0;
4075	int numberDown = 0;
4076	int numberFirstDown = 0;
4077	double averageInfDown = 0.0;
4078	double averageObjDown = 0.0;
4079	int numberCutoffDown = 0;
4080	int numberUp = 0;
4081	int numberFirstUp = 0;
4082	double averageInfUp = 0.0;
4083	double averageObjUp = 0.0;
4084	int numberCutoffUp = 0;
4085	double averageNumberIterations1 = 0.0;
4086	double averageValue = 0.0;
4087	for ( i = 0; i < numberNodes2_; i++) {
4088	int depth = statistics_[i]->depth();
4089	int way = statistics_[i]->way();
4090	double value = statistics_[i]->value();
4091	double startingObjective = statistics_[i]->startingObjective();
4092	int startingInfeasibility = statistics_[i]->startingInfeasibility();
4093	double endingObjective = statistics_[i]->endingObjective();
4094	int endingInfeasibility = statistics_[i]->endingInfeasibility();
4095	maxDepth = CoinMax(depth, maxDepth);
4096	// Only for completed
4097	averageNumberIterations1 += statistics_[i]->numberIterations();
4098	averageValue += value;
4099	if (endingObjective != COIN_DBL_MAX && !endingInfeasibility) {
4100	numberSolutions++;
4101	averageSolutionDepth += depth;
4102	}
4103	if (endingObjective == COIN_DBL_MAX) {
4104	numberCutoff++;
4105	averageCutoffDepth += depth;
4106	if (way < 0) {
4107	numberDown++;
4108	numberCutoffDown++;
4109	if (way == -1)
4110	numberFirstDown++;
4111	} else {
4112	numberUp++;
4113	numberCutoffUp++;
4114	if (way == 1)
4115	numberFirstUp++;
4116	}
4117	} else {
4118	averageSolvedDepth += depth;
4119	if (way < 0) {
4120	numberDown++;
4121	averageInfDown += startingInfeasibility - endingInfeasibility;
4122	averageObjDown += endingObjective - startingObjective;
4123	if (way == -1)
4124	numberFirstDown++;
4125	} else {
4126	numberUp++;
4127	averageInfUp += startingInfeasibility - endingInfeasibility;
4128	averageObjUp += endingObjective - startingObjective;
4129	if (way == 1)
4130	numberFirstUp++;
4131	}
4132	}
4133	}
4134	// Now print
4135	if (numberSolutions)
4136	averageSolutionDepth /= static_cast<double> (numberSolutions);
4137	int numberSolved = numberNodes2_ - numberCutoff;
4138	double averageNumberIterations2 = numberIterations_ - averageNumberIterations1
4139	- numberIterationsAtContinuous;
4140	if (numberCutoff) {
4141	averageCutoffDepth /= static_cast<double> (numberCutoff);
4142	averageNumberIterations2 /= static_cast<double> (numberCutoff);
4143	}
4144	if (numberNodes2_)
4145	averageValue /= static_cast<double> (numberNodes2_);
4146	if (numberSolved) {
4147	averageNumberIterations1 /= static_cast<double> (numberSolved);
4148	averageSolvedDepth /= static_cast<double> (numberSolved);
4149	}
4150	printf("%d solution(s) were found (by branching) at an average depth of %g\n",
4151	numberSolutions, averageSolutionDepth);
4152	printf("average value of variable being branched on was %g\n",
4153	averageValue);
4154	printf("%d nodes were cutoff at an average depth of %g with iteration count of %g\n",
4155	numberCutoff, averageCutoffDepth, averageNumberIterations2);
4156	printf("%d nodes were solved at an average depth of %g with iteration count of %g\n",
4157	numberSolved, averageSolvedDepth, averageNumberIterations1);
4158	if (numberDown) {
4159	averageInfDown /= static_cast<double> (numberDown);
4160	averageObjDown /= static_cast<double> (numberDown);
4161	}
4162	printf("Down %d nodes (%d first, %d second) - %d cutoff, rest decrease numinf %g increase obj %g\n",
4163	numberDown, numberFirstDown, numberDown - numberFirstDown, numberCutoffDown,
4164	averageInfDown, averageObjDown);
4165	if (numberUp) {
4166	averageInfUp /= static_cast<double> (numberUp);
4167	averageObjUp /= static_cast<double> (numberUp);
4168	}
4169	printf("Up %d nodes (%d first, %d second) - %d cutoff, rest decrease numinf %g increase obj %g\n",
4170	numberUp, numberFirstUp, numberUp - numberFirstUp, numberCutoffUp,
4171	averageInfUp, averageObjUp);
4172	for ( i = 0; i < numberNodes2_; i++)
4173	delete statistics_[i];
4174	delete [] statistics_;
4175	statistics_ = NULL;
4176	maximumStatistics_ = 0;
4177	delete [] lookup;
4178	}
4179	/*
4180	If we think we have a solution, restore and confirm it with a call to
4181	setBestSolution(). We need to reset the cutoff value so as not to fathom
4182	the solution on bounds. Note that calling setBestSolution( ..., true)
4183	leaves the continuousSolver_ bounds vectors fixed at the solution value.
4184
4185	Running resolve() here is a failsafe --- setBestSolution has already
4186	reoptimised using the continuousSolver_. If for some reason we fail to
4187	prove optimality, run the problem again after instructing the solver to
4188	tell us more.
4189
4190	If all looks good, replace solver_ with continuousSolver_, so that the
4191	outside world will be able to obtain information about the solution using
4192	public methods.
4193	*/
4194	if (bestSolution_ && (solverCharacteristics_->solverType() < 2 \|\| solverCharacteristics_->solverType() == 4)) {
4195	setCutoff(1.0e50) ; // As best solution should be worse than cutoff
4196	// also in continuousSolver_
4197	if (continuousSolver_) {
4198	// Solvers know about direction
4199	double direction = solver_->getObjSense();
4200	continuousSolver_->setDblParam(OsiDualObjectiveLimit, 1.0e50*direction);
4201	}
4202	phase_ = 5;
4203	double increment = getDblParam(CbcModel::CbcCutoffIncrement) ;
4204	if ((specialOptions_&4) == 0)
4205	bestObjective_ += 100.0 * increment + 1.0e-3; // only set if we are going to solve
4206	setBestSolution(CBC_END_SOLUTION, bestObjective_, bestSolution_, 1) ;
4207	continuousSolver_->resolve() ;
4208	if (!continuousSolver_->isProvenOptimal()) {
4209	continuousSolver_->messageHandler()->setLogLevel(2) ;
4210	continuousSolver_->initialSolve() ;
4211	}
4212	delete solver_ ;
4213	// above deletes solverCharacteristics_
4214	solverCharacteristics_ = NULL;
4215	solver_ = continuousSolver_ ;
4216	setPointers(solver_);
4217	continuousSolver_ = NULL ;
4218	}
4219	/*
4220	Clean up dangling objects. continuousSolver_ may already be toast.
4221	*/
4222	delete lastws ;
4223	if (saveObjects) {
4224	for (int i = 0; i < numberObjects_; i++)
4225	delete saveObjects[i];
4226	delete [] saveObjects;
4227	}
4228	numberStrong_ = saveNumberStrong;
4229	numberBeforeTrust_ = saveNumberBeforeTrust;
4230	delete [] whichGenerator_ ;
4231	whichGenerator_ = NULL;
4232	delete [] lowerBefore ;
4233	delete [] upperBefore ;
4234	delete [] walkback_ ;
4235	walkback_ = NULL ;
4236	delete [] lastNodeInfo_ ;
4237	lastNodeInfo_ = NULL;
4238	delete [] lastNumberCuts_ ;
4239	lastNumberCuts_ = NULL;
4240	delete [] lastCut_;
4241	lastCut_ = NULL;
4242	delete [] addedCuts_ ;
4243	addedCuts_ = NULL ;
4244	//delete persistentInfo;
4245	// Get rid of characteristics
4246	solverCharacteristics_ = NULL;
4247	if (continuousSolver_) {
4248	delete continuousSolver_ ;
4249	continuousSolver_ = NULL ;
4250	}
4251	/*
4252	Destroy global cuts by replacing with an empty OsiCuts object.
4253	*/
4254	globalCuts_ = OsiCuts() ;
4255	if (!bestSolution_) {
4256	// make sure lp solver is infeasible
4257	int numberColumns = solver_->getNumCols();
4258	const double * columnLower = solver_->getColLower();
4259	int iColumn;
4260	for (iColumn = 0; iColumn < numberColumns; iColumn++) {
4261	if (solver_->isInteger(iColumn))
4262	solver_->setColUpper(iColumn, columnLower[iColumn]);
4263	}
4264	solver_->initialSolve();
4265	}
4266	#ifdef COIN_HAS_CLP
4267	{
4268	OsiClpSolverInterface * clpSolver
4269	= dynamic_cast<OsiClpSolverInterface *> (solver_);
4270	if (clpSolver) {
4271	// Possible restore of pivot method
4272	if (savePivotMethod) {
4273	// model may have changed
4274	savePivotMethod->setModel(NULL);
4275	clpSolver->getModelPtr()->setDualRowPivotAlgorithm(*savePivotMethod);
4276	delete savePivotMethod;
4277	}
4278	clpSolver->setLargestAway(-1.0);
4279	}
4280	}
4281	#endif
4282	if (fastNodeDepth_ >= 1000000 && !parentModel_) {
4283	// delete object off end
4284	delete object_[numberObjects_];
4285	fastNodeDepth_ -= 1000000;
4286	}
4287	delete saveSolver;
4288	// Undo preprocessing performed during BaB.
4289	if (strategy_ && strategy_->preProcessState() > 0) {
4290	// undo preprocessing
4291	CglPreProcess * process = strategy_->process();
4292	assert (process);
4293	int n = originalSolver->getNumCols();
4294	if (bestSolution_) {
4295	delete [] bestSolution_;
4296	bestSolution_ = new double [n];
4297	process->postProcess(*solver_);
4298	}
4299	strategy_->deletePreProcess();
4300	// Solution now back in originalSolver
4301	delete solver_;
4302	solver_ = originalSolver;
4303	if (bestSolution_) {
4304	bestObjective_ = solver_->getObjValue() * solver_->getObjSense();
4305	memcpy(bestSolution_, solver_->getColSolution(), n*sizeof(double));
4306	}
4307	// put back original objects if there were any
4308	if (originalObject) {
4309	int iColumn;
4310	assert (ownObjects_);
4311	for (iColumn = 0; iColumn < numberObjects_; iColumn++)
4312	delete object_[iColumn];
4313	delete [] object_;
4314	numberObjects_ = numberOriginalObjects;
4315	object_ = originalObject;
4316	delete [] integerVariable_;
4317	numberIntegers_ = 0;
4318	for (iColumn = 0; iColumn < n; iColumn++) {
4319	if (solver_->isInteger(iColumn))
4320	numberIntegers_++;
4321	}
4322	integerVariable_ = new int[numberIntegers_];
4323	numberIntegers_ = 0;
4324	for (iColumn = 0; iColumn < n; iColumn++) {
4325	if (solver_->isInteger(iColumn))
4326	integerVariable_[numberIntegers_++] = iColumn;
4327	}
4328	}
4329	}
4330	#ifdef COIN_HAS_CLP
4331	{
4332	OsiClpSolverInterface * clpSolver
4333	= dynamic_cast<OsiClpSolverInterface *> (solver_);
4334	if (clpSolver)
4335	clpSolver->setFakeObjective(reinterpret_cast<double *> (NULL));
4336	}
4337	#endif
4338	moreSpecialOptions_ = saveMoreSpecialOptions;
4339	return ;
4340	}
4341
4342
4343	// Solve the initial LP relaxation
4344	void
4345	CbcModel::initialSolve()
4346	{
4347	assert (solver_);
4348	// Double check optimization directions line up
4349	dblParam_[CbcOptimizationDirection] = solver_->getObjSense();
4350	// Check if bounds are all integral (as may get messed up later)
4351	checkModel();
4352	if (!solverCharacteristics_) {
4353	OsiBabSolver * solverCharacteristics = dynamic_cast<OsiBabSolver *> (solver_->getAuxiliaryInfo());
4354	if (solverCharacteristics) {
4355	solverCharacteristics_ = solverCharacteristics;
4356	} else {
4357	// replace in solver
4358	OsiBabSolver defaultC;
4359	solver_->setAuxiliaryInfo(&defaultC);
4360	solverCharacteristics_ = dynamic_cast<OsiBabSolver *> (solver_->getAuxiliaryInfo());
4361	}
4362	}
4363	solverCharacteristics_->setSolver(solver_);
4364	solver_->setHintParam(OsiDoInBranchAndCut, true, OsiHintDo, NULL) ;
4365	solver_->initialSolve();
4366	solver_->setHintParam(OsiDoInBranchAndCut, false, OsiHintDo, NULL) ;
4367	if (!solver_->isProvenOptimal())
4368	solver_->resolve();
4369	// But set up so Jon Lee will be happy
4370	status_ = -1;
4371	secondaryStatus_ = -1;
4372	originalContinuousObjective_ = solver_->getObjValue() * solver_->getObjSense();
4373	bestPossibleObjective_ = originalContinuousObjective_;
4374	delete [] continuousSolution_;
4375	continuousSolution_ = CoinCopyOfArray(solver_->getColSolution(),
4376	solver_->getNumCols());
4377	setPointers(solver_);
4378	solverCharacteristics_ = NULL;
4379	}
4380
4381	/*! \brief Get an empty basis object
4382
4383	Return an empty CoinWarmStartBasis object with the requested capacity,
4384	appropriate for the current solver. The object is cloned from the object
4385	cached as emptyWarmStart_. If there is no cached object, the routine
4386	queries the solver for a warm start object, empties it, and caches the
4387	result.
4388	*/
4389
4390	CoinWarmStartBasis *CbcModel::getEmptyBasis (int ns, int na) const
4391
4392	{
4393	CoinWarmStartBasis *emptyBasis ;
4394	/*
4395	Acquire an empty basis object, if we don't yet have one.
4396	*/
4397	if (emptyWarmStart_ == 0) {
4398	if (solver_ == 0) {
4399	throw CoinError("Cannot construct basis without solver!",
4400	"getEmptyBasis", "CbcModel") ;
4401	}
4402	emptyBasis =
4403	dynamic_cast<CoinWarmStartBasis *>(solver_->getEmptyWarmStart()) ;
4404	if (emptyBasis == 0) {
4405	throw CoinError(
4406	"Solver does not appear to use a basis-oriented warm start.",
4407	"getEmptyBasis", "CbcModel") ;
4408	}
4409	emptyBasis->setSize(0, 0) ;
4410	emptyWarmStart_ = dynamic_cast<CoinWarmStart *>(emptyBasis) ;
4411	}
4412	/*
4413	Clone the empty basis object, resize it as requested, and return.
4414	*/
4415	emptyBasis = dynamic_cast<CoinWarmStartBasis *>(emptyWarmStart_->clone()) ;
4416	assert(emptyBasis) ;
4417	if (ns != 0 \|\| na != 0) emptyBasis->setSize(ns, na) ;
4418
4419	return (emptyBasis) ;
4420	}
4421
4422
4423	/** Default Constructor
4424
4425	Creates an empty model without an associated solver.
4426	*/
4427	CbcModel::CbcModel()
4428
4429	:
4430	solver_(NULL),
4431	ownership_(0x80000000),
4432	continuousSolver_(NULL),
4433	referenceSolver_(NULL),
4434	defaultHandler_(true),
4435	emptyWarmStart_(NULL),
4436	bestObjective_(COIN_DBL_MAX),
4437	bestPossibleObjective_(COIN_DBL_MAX),
4438	sumChangeObjective1_(0.0),
4439	sumChangeObjective2_(0.0),
4440	bestSolution_(NULL),
4441	savedSolutions_(NULL),
4442	currentSolution_(NULL),
4443	testSolution_(NULL),
4444	minimumDrop_(1.0e-4),
4445	numberSolutions_(0),
4446	numberSavedSolutions_(0),
4447	maximumSavedSolutions_(0),
4448	stateOfSearch_(0),
4449	whenCuts_(-1),
4450	hotstartSolution_(NULL),
4451	hotstartPriorities_(NULL),
4452	numberHeuristicSolutions_(0),
4453	numberNodes_(0),
4454	numberNodes2_(0),
4455	numberIterations_(0),
4456	numberSolves_(0),
4457	status_(-1),
4458	secondaryStatus_(-1),
4459	numberIntegers_(0),
4460	numberRowsAtContinuous_(0),
4461	maximumNumberCuts_(0),
4462	phase_(0),
4463	currentNumberCuts_(0),
4464	maximumDepth_(0),
4465	walkback_(NULL),
4466	lastNodeInfo_(NULL),
4467	lastCut_(NULL),
4468	lastDepth_(0),
4469	lastNumberCuts2_(0),
4470	maximumCuts_(0),
4471	lastNumberCuts_(NULL),
4472	addedCuts_(NULL),
4473	nextRowCut_(NULL),
4474	currentNode_(NULL),
4475	integerVariable_(NULL),
4476	integerInfo_(NULL),
4477	continuousSolution_(NULL),
4478	usedInSolution_(NULL),
4479	specialOptions_(0),
4480	moreSpecialOptions_(0),
4481	subTreeModel_(NULL),
4482	numberStoppedSubTrees_(0),
4483	presolve_(0),
4484	numberStrong_(5),
4485	numberBeforeTrust_(10),
4486	numberPenalties_(20),
4487	stopNumberIterations_(-1),
4488	penaltyScaleFactor_(3.0),
4489	numberAnalyzeIterations_(0),
4490	analyzeResults_(NULL),
4491	numberInfeasibleNodes_(0),
4492	problemType_(0),
4493	printFrequency_(0),
4494	numberCutGenerators_(0),
4495	generator_(NULL),
4496	virginGenerator_(NULL),
4497	numberHeuristics_(0),
4498	heuristic_(NULL),
4499	lastHeuristic_(NULL),
4500	fastNodeDepth_(-1),
4501	eventHandler_(NULL),
4502	numberObjects_(0),
4503	object_(NULL),
4504	ownObjects_(true),
4505	originalColumns_(NULL),
4506	howOftenGlobalScan_(1),
4507	numberGlobalViolations_(0),
4508	numberExtraIterations_(0),
4509	numberExtraNodes_(0),
4510	continuousObjective_(COIN_DBL_MAX),
4511	originalContinuousObjective_(COIN_DBL_MAX),
4512	continuousInfeasibilities_(COIN_INT_MAX),
4513	maximumCutPassesAtRoot_(20),
4514	maximumCutPasses_(10),
4515	preferredWay_(0),
4516	currentPassNumber_(0),
4517	maximumWhich_(1000),
4518	maximumRows_(0),
4519	currentDepth_(0),
4520	whichGenerator_(NULL),
4521	maximumStatistics_(0),
4522	statistics_(NULL),
4523	maximumDepthActual_(0),
4524	numberDJFixed_(0.0),
4525	probingInfo_(NULL),
4526	numberFixedAtRoot_(0),
4527	numberFixedNow_(0),
4528	stoppedOnGap_(false),
4529	eventHappened_(false),
4530	numberLongStrong_(0),
4531	numberOldActiveCuts_(0),
4532	numberNewCuts_(0),
4533	searchStrategy_(-1),
4534	numberStrongIterations_(0),
4535	resolveAfterTakeOffCuts_(true),
4536	maximumNumberIterations_(-1),
4537	continuousPriority_(COIN_INT_MAX),
4538	numberUpdateItems_(0),
4539	maximumNumberUpdateItems_(0),
4540	updateItems_(NULL),
4541	storedRowCuts_(NULL),
4542	numberThreads_(0),
4543	threadMode_(0),
4544	master_(NULL),
4545	masterThread_(NULL)
4546	{
4547	memset(intParam_, 0, sizeof(intParam_));
4548	intParam_[CbcMaxNumNode] = 2147483647;
4549	intParam_[CbcMaxNumSol] = 9999999;
4550
4551	memset(dblParam_, 0, sizeof(dblParam_));
4552	dblParam_[CbcIntegerTolerance] = 1e-6;
4553	dblParam_[CbcCutoffIncrement] = 1e-5;
4554	dblParam_[CbcAllowableGap] = 1.0e-10;
4555	dblParam_[CbcMaximumSeconds] = 1.0e100;
4556	dblParam_[CbcCurrentCutoff] = 1.0e100;
4557	dblParam_[CbcOptimizationDirection] = 1.0;
4558	dblParam_[CbcCurrentObjectiveValue] = 1.0e100;
4559	dblParam_[CbcCurrentMinimizationObjectiveValue] = 1.0e100;
4560	strongInfo_[0] = 0;
4561	strongInfo_[1] = 0;
4562	strongInfo_[2] = 0;
4563	strongInfo_[3] = 0;
4564	strongInfo_[4] = 0;
4565	strongInfo_[5] = 0;
4566	strongInfo_[6] = 0;
4567	solverCharacteristics_ = NULL;
4568	nodeCompare_ = new CbcCompareDefault();;
4569	problemFeasibility_ = new CbcFeasibilityBase();
4570	tree_ = new CbcTree();
4571	branchingMethod_ = NULL;
4572	cutModifier_ = NULL;
4573	strategy_ = NULL;
4574	parentModel_ = NULL;
4575	cbcColLower_ = NULL;
4576	cbcColUpper_ = NULL;
4577	cbcRowLower_ = NULL;
4578	cbcRowUpper_ = NULL;
4579	cbcColSolution_ = NULL;
4580	cbcRowPrice_ = NULL;
4581	cbcReducedCost_ = NULL;
4582	cbcRowActivity_ = NULL;
4583	appData_ = NULL;
4584	handler_ = new CoinMessageHandler();
4585	handler_->setLogLevel(2);
4586	messages_ = CbcMessage();
4587	//eventHandler_ = new CbcEventHandler() ;
4588	}
4589
4590	/** Constructor from solver.
4591
4592	Creates a model complete with a clone of the solver passed as a parameter.
4593	*/
4594
4595	CbcModel::CbcModel(const OsiSolverInterface &rhs)
4596	:
4597	continuousSolver_(NULL),
4598	referenceSolver_(NULL),
4599	defaultHandler_(true),
4600	emptyWarmStart_(NULL),
4601	bestObjective_(COIN_DBL_MAX),
4602	bestPossibleObjective_(COIN_DBL_MAX),
4603	sumChangeObjective1_(0.0),
4604	sumChangeObjective2_(0.0),
4605	minimumDrop_(1.0e-4),
4606	numberSolutions_(0),
4607	numberSavedSolutions_(0),
4608	maximumSavedSolutions_(0),
4609	stateOfSearch_(0),
4610	whenCuts_(-1),
4611	hotstartSolution_(NULL),
4612	hotstartPriorities_(NULL),
4613	numberHeuristicSolutions_(0),
4614	numberNodes_(0),
4615	numberNodes2_(0),
4616	numberIterations_(0),
4617	numberSolves_(0),
4618	status_(-1),
4619	secondaryStatus_(-1),
4620	numberRowsAtContinuous_(0),
4621	maximumNumberCuts_(0),
4622	phase_(0),
4623	currentNumberCuts_(0),
4624	maximumDepth_(0),
4625	walkback_(NULL),
4626	lastNodeInfo_(NULL),
4627	lastCut_(NULL),
4628	lastDepth_(0),
4629	lastNumberCuts2_(0),
4630	maximumCuts_(0),
4631	lastNumberCuts_(NULL),
4632	addedCuts_(NULL),
4633	nextRowCut_(NULL),
4634	currentNode_(NULL),
4635	integerInfo_(NULL),
4636	specialOptions_(0),
4637	moreSpecialOptions_(0),
4638	subTreeModel_(NULL),
4639	numberStoppedSubTrees_(0),
4640	presolve_(0),
4641	numberStrong_(5),
4642	numberBeforeTrust_(10),
4643	numberPenalties_(20),
4644	stopNumberIterations_(-1),
4645	penaltyScaleFactor_(3.0),
4646	numberAnalyzeIterations_(0),
4647	analyzeResults_(NULL),
4648	numberInfeasibleNodes_(0),
4649	problemType_(0),
4650	printFrequency_(0),
4651	numberCutGenerators_(0),
4652	generator_(NULL),
4653	virginGenerator_(NULL),
4654	numberHeuristics_(0),
4655	heuristic_(NULL),
4656	lastHeuristic_(NULL),
4657	fastNodeDepth_(-1),
4658	eventHandler_(NULL),
4659	numberObjects_(0),
4660	object_(NULL),
4661	ownObjects_(true),
4662	originalColumns_(NULL),
4663	howOftenGlobalScan_(1),
4664	numberGlobalViolations_(0),
4665	numberExtraIterations_(0),
4666	numberExtraNodes_(0),
4667	continuousObjective_(COIN_DBL_MAX),
4668	originalContinuousObjective_(COIN_DBL_MAX),
4669	continuousInfeasibilities_(COIN_INT_MAX),
4670	maximumCutPassesAtRoot_(20),
4671	maximumCutPasses_(10),
4672	preferredWay_(0),
4673	currentPassNumber_(0),
4674	maximumWhich_(1000),
4675	maximumRows_(0),
4676	currentDepth_(0),
4677	whichGenerator_(NULL),
4678	maximumStatistics_(0),
4679	statistics_(NULL),
4680	maximumDepthActual_(0),
4681	numberDJFixed_(0.0),
4682	probingInfo_(NULL),
4683	numberFixedAtRoot_(0),
4684	numberFixedNow_(0),
4685	stoppedOnGap_(false),
4686	eventHappened_(false),
4687	numberLongStrong_(0),
4688	numberOldActiveCuts_(0),
4689	numberNewCuts_(0),
4690	searchStrategy_(-1),
4691	numberStrongIterations_(0),
4692	resolveAfterTakeOffCuts_(true),
4693	maximumNumberIterations_(-1),
4694	continuousPriority_(COIN_INT_MAX),
4695	numberUpdateItems_(0),
4696	maximumNumberUpdateItems_(0),
4697	updateItems_(NULL),
4698	storedRowCuts_(NULL),
4699	numberThreads_(0),
4700	threadMode_(0),
4701	master_(NULL),
4702	masterThread_(NULL)
4703	{
4704	memset(intParam_, 0, sizeof(intParam_));
4705	intParam_[CbcMaxNumNode] = 2147483647;
4706	intParam_[CbcMaxNumSol] = 9999999;
4707
4708	memset(dblParam_, 0, sizeof(dblParam_));
4709	dblParam_[CbcIntegerTolerance] = 1e-6;
4710	dblParam_[CbcCutoffIncrement] = 1e-5;
4711	dblParam_[CbcAllowableGap] = 1.0e-10;
4712	dblParam_[CbcMaximumSeconds] = 1.0e100;
4713	dblParam_[CbcCurrentCutoff] = 1.0e100;
4714	dblParam_[CbcOptimizationDirection] = 1.0;
4715	dblParam_[CbcCurrentObjectiveValue] = 1.0e100;
4716	dblParam_[CbcCurrentMinimizationObjectiveValue] = 1.0e100;
4717	strongInfo_[0] = 0;
4718	strongInfo_[1] = 0;
4719	strongInfo_[2] = 0;
4720	strongInfo_[3] = 0;
4721	strongInfo_[4] = 0;
4722	strongInfo_[5] = 0;
4723	strongInfo_[6] = 0;
4724	solverCharacteristics_ = NULL;
4725	nodeCompare_ = new CbcCompareDefault();;
4726	problemFeasibility_ = new CbcFeasibilityBase();
4727	tree_ = new CbcTree();
4728	branchingMethod_ = NULL;
4729	cutModifier_ = NULL;
4730	strategy_ = NULL;
4731	parentModel_ = NULL;
4732	appData_ = NULL;
4733	solver_ = rhs.clone();
4734	handler_ = new CoinMessageHandler();
4735	if (!solver_->defaultHandler()&&
4736	solver_->messageHandler()->logLevel(0)!=-1000)
4737	passInMessageHandler(solver_->messageHandler());
4738	handler_->setLogLevel(2);
4739	messages_ = CbcMessage();
4740	//eventHandler_ = new CbcEventHandler() ;
4741	referenceSolver_ = solver_->clone();
4742	ownership_ = 0x80000000;
4743	cbcColLower_ = NULL;
4744	cbcColUpper_ = NULL;
4745	cbcRowLower_ = NULL;
4746	cbcRowUpper_ = NULL;
4747	cbcColSolution_ = NULL;
4748	cbcRowPrice_ = NULL;
4749	cbcReducedCost_ = NULL;
4750	cbcRowActivity_ = NULL;
4751
4752	// Initialize solution and integer variable vectors
4753	bestSolution_ = NULL; // to say no solution found
4754	savedSolutions_ = NULL;
4755	numberIntegers_ = 0;
4756	int numberColumns = solver_->getNumCols();
4757	int iColumn;
4758	if (numberColumns) {
4759	// Space for current solution
4760	currentSolution_ = new double[numberColumns];
4761	continuousSolution_ = new double[numberColumns];
4762	usedInSolution_ = new int[numberColumns];
4763	CoinZeroN(usedInSolution_, numberColumns);
4764	for (iColumn = 0; iColumn < numberColumns; iColumn++) {
4765	if ( solver_->isInteger(iColumn))
4766	numberIntegers_++;
4767	}
4768	} else {
4769	// empty model
4770	currentSolution_ = NULL;
4771	continuousSolution_ = NULL;
4772	usedInSolution_ = NULL;
4773	}
4774	testSolution_ = currentSolution_;
4775	if (numberIntegers_) {
4776	integerVariable_ = new int [numberIntegers_];
4777	numberIntegers_ = 0;
4778	for (iColumn = 0; iColumn < numberColumns; iColumn++) {
4779	if ( solver_->isInteger(iColumn))
4780	integerVariable_[numberIntegers_++] = iColumn;
4781	}
4782	} else {
4783	integerVariable_ = NULL;
4784	}
4785	}
4786
4787	/*
4788	Assign a solver to the model (model assumes ownership)
4789
4790	The integer variable vector is initialized if it's not already present.
4791	If deleteSolver then current solver deleted (if model owned)
4792
4793	Assuming ownership matches usage in OsiSolverInterface
4794	(cf. assignProblem, loadProblem).
4795
4796	TODO: What to do about solver parameters? A simple copy likely won't do it,
4797	because the SI must push the settings into the underlying solver. In
4798	the context of switching solvers in cbc, this means that command line
4799	settings will get lost. Stash the command line somewhere and reread it
4800	here, maybe?
4801
4802	TODO: More generally, how much state should be transferred from the old
4803	solver to the new solver? Best perhaps to see how usage develops.
4804	What's done here mimics the CbcModel(OsiSolverInterface) constructor.
4805	*/
4806	void
4807	CbcModel::assignSolver(OsiSolverInterface *&solver, bool deleteSolver)
4808
4809	{
4810	// resize best solution if exists
4811	if (bestSolution_ && solver && solver_) {
4812	int nOld = solver_->getNumCols();
4813	int nNew = solver->getNumCols();
4814	if (nNew > nOld) {
4815	double * temp = new double[nNew];
4816	memcpy(temp, bestSolution_, nOld*sizeof(double));
4817	memset(temp + nOld, 0, (nNew - nOld)*sizeof(double));
4818	delete [] bestSolution_;
4819	bestSolution_ = temp;
4820	}
4821	}
4822	// Keep the current message level for solver (if solver exists)
4823	if (solver_)
4824	solver->messageHandler()->setLogLevel(solver_->messageHandler()->logLevel()) ;
4825
4826	if (modelOwnsSolver() && deleteSolver) {
4827	solverCharacteristics_ = NULL;
4828	delete solver_ ;
4829	}
4830	solver_ = solver;
4831	solver = NULL ;
4832	setModelOwnsSolver(true) ;
4833	/*
4834	Basis information is solver-specific.
4835	*/
4836	if (emptyWarmStart_) {
4837	delete emptyWarmStart_ ;
4838	emptyWarmStart_ = 0 ;
4839	}
4840	bestSolutionBasis_ = CoinWarmStartBasis();
4841	/*
4842	Initialize integer variable vector.
4843	*/
4844	numberIntegers_ = 0;
4845	int numberColumns = solver_->getNumCols();
4846	int iColumn;
4847	for (iColumn = 0; iColumn < numberColumns; iColumn++) {
4848	if ( solver_->isInteger(iColumn))
4849	numberIntegers_++;
4850	}
4851	delete [] integerVariable_;
4852	if (numberIntegers_) {
4853	integerVariable_ = new int [numberIntegers_];
4854	numberIntegers_ = 0;
4855	for (iColumn = 0; iColumn < numberColumns; iColumn++) {
4856	if ( solver_->isInteger(iColumn))
4857	integerVariable_[numberIntegers_++] = iColumn;
4858	}
4859	} else {
4860	integerVariable_ = NULL;
4861	}
4862
4863	return ;
4864	}
4865
4866	// Copy constructor.
4867
4868	CbcModel::CbcModel(const CbcModel & rhs, bool cloneHandler)
4869	:
4870	continuousSolver_(NULL),
4871	referenceSolver_(NULL),
4872	defaultHandler_(rhs.defaultHandler_),
4873	emptyWarmStart_(NULL),
4874	bestObjective_(rhs.bestObjective_),
4875	bestPossibleObjective_(rhs.bestPossibleObjective_),
4876	sumChangeObjective1_(rhs.sumChangeObjective1_),
4877	sumChangeObjective2_(rhs.sumChangeObjective2_),
4878	minimumDrop_(rhs.minimumDrop_),
4879	numberSolutions_(rhs.numberSolutions_),
4880	numberSavedSolutions_(rhs.numberSavedSolutions_),
4881	maximumSavedSolutions_(rhs.maximumSavedSolutions_),
4882	stateOfSearch_(rhs.stateOfSearch_),
4883	whenCuts_(rhs.whenCuts_),
4884	numberHeuristicSolutions_(rhs.numberHeuristicSolutions_),
4885	numberNodes_(rhs.numberNodes_),
4886	numberNodes2_(rhs.numberNodes2_),
4887	numberIterations_(rhs.numberIterations_),
4888	numberSolves_(rhs.numberSolves_),
4889	status_(rhs.status_),
4890	secondaryStatus_(rhs.secondaryStatus_),
4891	specialOptions_(rhs.specialOptions_),
4892	moreSpecialOptions_(rhs.moreSpecialOptions_),
4893	subTreeModel_(rhs.subTreeModel_),
4894	numberStoppedSubTrees_(rhs.numberStoppedSubTrees_),
4895	presolve_(rhs.presolve_),
4896	numberStrong_(rhs.numberStrong_),
4897	numberBeforeTrust_(rhs.numberBeforeTrust_),
4898	numberPenalties_(rhs.numberPenalties_),
4899	stopNumberIterations_(rhs.stopNumberIterations_),
4900	penaltyScaleFactor_(rhs.penaltyScaleFactor_),
4901	numberAnalyzeIterations_(rhs.numberAnalyzeIterations_),
4902	analyzeResults_(NULL),
4903	numberInfeasibleNodes_(rhs.numberInfeasibleNodes_),
4904	problemType_(rhs.problemType_),
4905	printFrequency_(rhs.printFrequency_),
4906	fastNodeDepth_(rhs.fastNodeDepth_),
4907	howOftenGlobalScan_(rhs.howOftenGlobalScan_),
4908	numberGlobalViolations_(rhs.numberGlobalViolations_),
4909	numberExtraIterations_(rhs.numberExtraIterations_),
4910	numberExtraNodes_(rhs.numberExtraNodes_),
4911	continuousObjective_(rhs.continuousObjective_),
4912	originalContinuousObjective_(rhs.originalContinuousObjective_),
4913	continuousInfeasibilities_(rhs.continuousInfeasibilities_),
4914	maximumCutPassesAtRoot_(rhs.maximumCutPassesAtRoot_),
4915	maximumCutPasses_( rhs.maximumCutPasses_),
4916	preferredWay_(rhs.preferredWay_),
4917	currentPassNumber_(rhs.currentPassNumber_),
4918	maximumWhich_(rhs.maximumWhich_),
4919	maximumRows_(0),
4920	currentDepth_(0),
4921	whichGenerator_(NULL),
4922	maximumStatistics_(0),
4923	statistics_(NULL),
4924	maximumDepthActual_(0),
4925	numberDJFixed_(0.0),
4926	probingInfo_(NULL),
4927	numberFixedAtRoot_(rhs.numberFixedAtRoot_),
4928	numberFixedNow_(rhs.numberFixedNow_),
4929	stoppedOnGap_(rhs.stoppedOnGap_),
4930	eventHappened_(rhs.eventHappened_),
4931	numberLongStrong_(rhs.numberLongStrong_),
4932	numberOldActiveCuts_(rhs.numberOldActiveCuts_),
4933	numberNewCuts_(rhs.numberNewCuts_),
4934	searchStrategy_(rhs.searchStrategy_),
4935	numberStrongIterations_(rhs.numberStrongIterations_),
4936	resolveAfterTakeOffCuts_(rhs.resolveAfterTakeOffCuts_),
4937	maximumNumberIterations_(rhs.maximumNumberIterations_),
4938	continuousPriority_(rhs.continuousPriority_),
4939	numberUpdateItems_(rhs.numberUpdateItems_),
4940	maximumNumberUpdateItems_(rhs.maximumNumberUpdateItems_),
4941	updateItems_(NULL),
4942	storedRowCuts_(NULL),
4943	numberThreads_(rhs.numberThreads_),
4944	threadMode_(rhs.threadMode_),
4945	master_(NULL),
4946	masterThread_(NULL)
4947	{
4948	memcpy(intParam_, rhs.intParam_, sizeof(intParam_));
4949	memcpy(dblParam_, rhs.dblParam_, sizeof(dblParam_));
4950	strongInfo_[0] = rhs.strongInfo_[0];
4951	strongInfo_[1] = rhs.strongInfo_[1];
4952	strongInfo_[2] = rhs.strongInfo_[2];
4953	strongInfo_[3] = rhs.strongInfo_[3];
4954	strongInfo_[4] = rhs.strongInfo_[4];
4955	strongInfo_[5] = rhs.strongInfo_[5];
4956	strongInfo_[6] = rhs.strongInfo_[6];
4957	solverCharacteristics_ = NULL;
4958	if (rhs.emptyWarmStart_) emptyWarmStart_ = rhs.emptyWarmStart_->clone() ;
4959	if (defaultHandler_ \|\| cloneHandler) {
4960	handler_ = new CoinMessageHandler();
4961	handler_->setLogLevel(2);
4962	} else {
4963	handler_ = rhs.handler_;
4964	}
4965	messageHandler()->setLogLevel(rhs.messageHandler()->logLevel());
4966	numberCutGenerators_ = rhs.numberCutGenerators_;
4967	if (numberCutGenerators_) {
4968	generator_ = new CbcCutGenerator * [numberCutGenerators_];
4969	virginGenerator_ = new CbcCutGenerator * [numberCutGenerators_];
4970	int i;
4971	for (i = 0; i < numberCutGenerators_; i++) {
4972	generator_[i] = new CbcCutGenerator(*rhs.generator_[i]);
4973	virginGenerator_[i] = new CbcCutGenerator(*rhs.virginGenerator_[i]);
4974	}
4975	} else {
4976	generator_ = NULL;
4977	virginGenerator_ = NULL;
4978	}
4979	globalCuts_ = rhs.globalCuts_;
4980	numberHeuristics_ = rhs.numberHeuristics_;
4981	if (numberHeuristics_) {
4982	heuristic_ = new CbcHeuristic * [numberHeuristics_];
4983	int i;
4984	for (i = 0; i < numberHeuristics_; i++) {
4985	heuristic_[i] = rhs.heuristic_[i]->clone();
4986	}
4987	} else {
4988	heuristic_ = NULL;
4989	}
4990	lastHeuristic_ = NULL;
4991	if (rhs.eventHandler_) {
4992	eventHandler_ = rhs.eventHandler_->clone() ;
4993	} else {
4994	eventHandler_ = NULL ;
4995	}
4996	ownObjects_ = rhs.ownObjects_;
4997	if (ownObjects_) {
4998	numberObjects_ = rhs.numberObjects_;
4999	if (numberObjects_) {
5000	object_ = new OsiObject * [numberObjects_];
5001	int i;
5002	for (i = 0; i < numberObjects_; i++) {
5003	object_[i] = (rhs.object_[i])->clone();
5004	CbcObject * obj = dynamic_cast <CbcObject *>(object_[i]) ;
5005	// Could be OsiObjects
5006	if (obj)
5007	obj->setModel(this);
5008	}
5009	} else {
5010	object_ = NULL;
5011	}
5012	} else {
5013	// assume will be redone
5014	numberObjects_ = 0;
5015	object_ = NULL;
5016	}
5017	if (rhs.referenceSolver_)
5018	referenceSolver_ = rhs.referenceSolver_->clone();
5019	else
5020	referenceSolver_ = NULL;
5021	solver_ = rhs.solver_->clone();
5022	if (rhs.originalColumns_) {
5023	int numberColumns = solver_->getNumCols();
5024	originalColumns_ = new int [numberColumns];
5025	memcpy(originalColumns_, rhs.originalColumns_, numberColumns*sizeof(int));
5026	} else {
5027	originalColumns_ = NULL;
5028	}
5029	if (maximumNumberUpdateItems_) {
5030	updateItems_ = new CbcObjectUpdateData [maximumNumberUpdateItems_];
5031	for (int i = 0; i < maximumNumberUpdateItems_; i++)
5032	updateItems_[i] = rhs.updateItems_[i];
5033	}
5034	if (maximumWhich_ && rhs.whichGenerator_)
5035	whichGenerator_ = CoinCopyOfArray(rhs.whichGenerator_, maximumWhich_);
5036	nodeCompare_ = rhs.nodeCompare_->clone();
5037	problemFeasibility_ = rhs.problemFeasibility_->clone();
5038	tree_ = rhs.tree_->clone();
5039	if (rhs.branchingMethod_)
5040	branchingMethod_ = rhs.branchingMethod_->clone();
5041	else
5042	branchingMethod_ = NULL;
5043	if (rhs.cutModifier_)
5044	cutModifier_ = rhs.cutModifier_->clone();
5045	else
5046	cutModifier_ = NULL;
5047	cbcColLower_ = NULL;
5048	cbcColUpper_ = NULL;
5049	cbcRowLower_ = NULL;
5050	cbcRowUpper_ = NULL;
5051	cbcColSolution_ = NULL;
5052	cbcRowPrice_ = NULL;
5053	cbcReducedCost_ = NULL;
5054	cbcRowActivity_ = NULL;
5055	if (rhs.strategy_)
5056	strategy_ = rhs.strategy_->clone();
5057	else
5058	strategy_ = NULL;
5059	parentModel_ = rhs.parentModel_;
5060	appData_ = rhs.appData_;
5061	messages_ = rhs.messages_;
5062	ownership_ = rhs.ownership_ \| 0x80000000;
5063	messageHandler()->setLogLevel(rhs.messageHandler()->logLevel());
5064	numberIntegers_ = rhs.numberIntegers_;
5065	randomNumberGenerator_ = rhs.randomNumberGenerator_;
5066	if (numberIntegers_) {
5067	integerVariable_ = new int [numberIntegers_];
5068	memcpy(integerVariable_, rhs.integerVariable_, numberIntegers_*sizeof(int));
5069	integerInfo_ = CoinCopyOfArray(rhs.integerInfo_, solver_->getNumCols());
5070	} else {
5071	integerVariable_ = NULL;
5072	integerInfo_ = NULL;
5073	}
5074	if (rhs.hotstartSolution_) {
5075	int numberColumns = solver_->getNumCols();
5076	hotstartSolution_ = CoinCopyOfArray(rhs.hotstartSolution_, numberColumns);
5077	hotstartPriorities_ = CoinCopyOfArray(rhs.hotstartPriorities_, numberColumns);
5078	} else {
5079	hotstartSolution_ = NULL;
5080	hotstartPriorities_ = NULL;
5081	}
5082	if (rhs.bestSolution_) {
5083	int numberColumns = solver_->getNumCols();
5084	bestSolution_ = new double[numberColumns];
5085	memcpy(bestSolution_, rhs.bestSolution_, numberColumns*sizeof(double));
5086	} else {
5087	bestSolution_ = NULL;
5088	}
5089	int numberColumns = solver_->getNumCols();
5090	if (maximumSavedSolutions_ && rhs.savedSolutions_) {
5091	savedSolutions_ = new double * [maximumSavedSolutions_];
5092	for (int i = 0; i < maximumSavedSolutions_; i++)
5093	savedSolutions_[i] = CoinCopyOfArray(rhs.savedSolutions_[i], numberColumns + 2);
5094	} else {
5095	savedSolutions_ = NULL;
5096	}
5097	// Space for current solution
5098	currentSolution_ = new double[numberColumns];
5099	continuousSolution_ = new double[numberColumns];
5100	usedInSolution_ = new int[numberColumns];
5101	CoinZeroN(usedInSolution_, numberColumns);
5102	testSolution_ = currentSolution_;
5103	numberRowsAtContinuous_ = rhs.numberRowsAtContinuous_;
5104	maximumNumberCuts_ = rhs.maximumNumberCuts_;
5105	phase_ = rhs.phase_;
5106	currentNumberCuts_ = rhs.currentNumberCuts_;
5107	maximumDepth_ = rhs.maximumDepth_;
5108	// These are only used as temporary arrays so need not be filled
5109	if (maximumNumberCuts_) {
5110	addedCuts_ = new CbcCountRowCut * [maximumNumberCuts_];
5111	} else {
5112	addedCuts_ = NULL;
5113	}
5114	bestSolutionBasis_ = rhs.bestSolutionBasis_;
5115	nextRowCut_ = NULL;
5116	currentNode_ = NULL;
5117	if (maximumDepth_) {
5118	walkback_ = new CbcNodeInfo * [maximumDepth_];
5119	lastNodeInfo_ = new CbcNodeInfo * [maximumDepth_] ;
5120	lastNumberCuts_ = new int [maximumDepth_] ;
5121	} else {
5122	walkback_ = NULL;
5123	lastNodeInfo_ = NULL;
5124	lastNumberCuts_ = NULL;
5125	}
5126	maximumCuts_ = rhs.maximumCuts_;
5127	if (maximumCuts_) {
5128	lastCut_ = new const OsiRowCut * [maximumCuts_] ;
5129	} else {
5130	lastCut_ = NULL;
5131	}
5132	synchronizeModel();
5133	if (cloneHandler && !defaultHandler_) {
5134	delete handler_;
5135	CoinMessageHandler * handler = rhs.handler_->clone();
5136	passInMessageHandler(handler);
5137	}
5138	}
5139
5140	// Assignment operator
5141	CbcModel &
5142	CbcModel::operator=(const CbcModel & rhs)
5143	{
5144	if (this != &rhs) {
5145	if (modelOwnsSolver()) {
5146	solverCharacteristics_ = NULL;
5147	delete solver_;
5148	solver_ = NULL;
5149	}
5150	gutsOfDestructor();
5151	if (defaultHandler_) {
5152	delete handler_;
5153	handler_ = NULL;
5154	}
5155	defaultHandler_ = rhs.defaultHandler_;
5156	if (defaultHandler_) {
5157	handler_ = new CoinMessageHandler();
5158	handler_->setLogLevel(2);
5159	} else {
5160	handler_ = rhs.handler_;
5161	}
5162	messages_ = rhs.messages_;
5163	messageHandler()->setLogLevel(rhs.messageHandler()->logLevel());
5164	if (rhs.solver_) {
5165	solver_ = rhs.solver_->clone() ;
5166	} else {
5167	solver_ = 0 ;
5168	}
5169	ownership_ = 0x80000000;
5170	delete continuousSolver_ ;
5171	if (rhs.continuousSolver_) {
5172	continuousSolver_ = rhs.continuousSolver_->clone() ;
5173	} else {
5174	continuousSolver_ = 0 ;
5175	}
5176	delete referenceSolver_;
5177	if (rhs.referenceSolver_) {
5178	referenceSolver_ = rhs.referenceSolver_->clone() ;
5179	} else {
5180	referenceSolver_ = NULL ;
5181	}
5182
5183	delete emptyWarmStart_ ;
5184	if (rhs.emptyWarmStart_) {
5185	emptyWarmStart_ = rhs.emptyWarmStart_->clone() ;
5186	} else {
5187	emptyWarmStart_ = 0 ;
5188	}
5189
5190	bestObjective_ = rhs.bestObjective_;
5191	bestPossibleObjective_ = rhs.bestPossibleObjective_;
5192	sumChangeObjective1_ = rhs.sumChangeObjective1_;
5193	sumChangeObjective2_ = rhs.sumChangeObjective2_;
5194	delete [] bestSolution_;
5195	if (rhs.bestSolution_) {
5196	int numberColumns = rhs.getNumCols();
5197	bestSolution_ = new double[numberColumns];
5198	memcpy(bestSolution_, rhs.bestSolution_, numberColumns*sizeof(double));
5199	} else {
5200	bestSolution_ = NULL;
5201	}
5202	for (int i = 0; i < maximumSavedSolutions_; i++)
5203	delete [] savedSolutions_[i];
5204	delete [] savedSolutions_;
5205	savedSolutions_ = NULL;
5206	int numberColumns = rhs.getNumCols();
5207	if (numberColumns) {
5208	// Space for current solution
5209	currentSolution_ = new double[numberColumns];
5210	continuousSolution_ = new double[numberColumns];
5211	usedInSolution_ = new int[numberColumns];
5212	CoinZeroN(usedInSolution_, numberColumns);
5213	} else {
5214	currentSolution_ = NULL;
5215	continuousSolution_ = NULL;
5216	usedInSolution_ = NULL;
5217	}
5218	if (maximumSavedSolutions_) {
5219	savedSolutions_ = new double * [maximumSavedSolutions_];
5220	for (int i = 0; i < maximumSavedSolutions_; i++)
5221	savedSolutions_[i] = CoinCopyOfArray(rhs.savedSolutions_[i], numberColumns + 2);
5222	} else {
5223	savedSolutions_ = NULL;
5224	}
5225	testSolution_ = currentSolution_;
5226	minimumDrop_ = rhs.minimumDrop_;
5227	numberSolutions_ = rhs.numberSolutions_;
5228	numberSavedSolutions_ = rhs.numberSavedSolutions_;
5229	maximumSavedSolutions_ = rhs.maximumSavedSolutions_;
5230	stateOfSearch_ = rhs.stateOfSearch_;
5231	whenCuts_ = rhs.whenCuts_;
5232	numberHeuristicSolutions_ = rhs.numberHeuristicSolutions_;
5233	numberNodes_ = rhs.numberNodes_;
5234	numberNodes2_ = rhs.numberNodes2_;
5235	numberIterations_ = rhs.numberIterations_;
5236	numberSolves_ = rhs.numberSolves_;
5237	status_ = rhs.status_;
5238	secondaryStatus_ = rhs.secondaryStatus_;
5239	specialOptions_ = rhs.specialOptions_;
5240	moreSpecialOptions_ = rhs.moreSpecialOptions_;
5241	subTreeModel_ = rhs.subTreeModel_;
5242	numberStoppedSubTrees_ = rhs.numberStoppedSubTrees_;
5243	presolve_ = rhs.presolve_;
5244	numberStrong_ = rhs.numberStrong_;
5245	numberBeforeTrust_ = rhs.numberBeforeTrust_;
5246	numberPenalties_ = rhs.numberPenalties_;
5247	stopNumberIterations_ = rhs.stopNumberIterations_;
5248	penaltyScaleFactor_ = rhs.penaltyScaleFactor_;
5249	numberAnalyzeIterations_ = rhs.numberAnalyzeIterations_;
5250	delete [] analyzeResults_;
5251	analyzeResults_ = NULL;
5252	numberInfeasibleNodes_ = rhs.numberInfeasibleNodes_;
5253	problemType_ = rhs.problemType_;
5254	printFrequency_ = rhs.printFrequency_;
5255	howOftenGlobalScan_ = rhs.howOftenGlobalScan_;
5256	numberGlobalViolations_ = rhs.numberGlobalViolations_;
5257	numberExtraIterations_ = rhs.numberExtraIterations_;
5258	numberExtraNodes_ = rhs.numberExtraNodes_;
5259	continuousObjective_ = rhs.continuousObjective_;
5260	originalContinuousObjective_ = rhs.originalContinuousObjective_;
5261	continuousInfeasibilities_ = rhs.continuousInfeasibilities_;
5262	maximumCutPassesAtRoot_ = rhs.maximumCutPassesAtRoot_;
5263	maximumCutPasses_ = rhs.maximumCutPasses_;
5264	preferredWay_ = rhs.preferredWay_;
5265	currentPassNumber_ = rhs.currentPassNumber_;
5266	memcpy(intParam_, rhs.intParam_, sizeof(intParam_));
5267	memcpy(dblParam_, rhs.dblParam_, sizeof(dblParam_));
5268	globalCuts_ = rhs.globalCuts_;
5269	int i;
5270	for (i = 0; i < numberCutGenerators_; i++) {
5271	delete generator_[i];
5272	delete virginGenerator_[i];
5273	}
5274	delete [] generator_;
5275	delete [] virginGenerator_;
5276	delete [] heuristic_;
5277	maximumWhich_ = rhs.maximumWhich_;
5278	delete [] whichGenerator_;
5279	whichGenerator_ = NULL;
5280	if (maximumWhich_ && rhs.whichGenerator_)
5281	whichGenerator_ = CoinCopyOfArray(rhs.whichGenerator_, maximumWhich_);
5282	maximumRows_ = 0;
5283	currentDepth_ = 0;
5284	randomNumberGenerator_ = rhs.randomNumberGenerator_;
5285	workingBasis_ = CoinWarmStartBasis();
5286	for (i = 0; i < maximumStatistics_; i++)
5287	delete statistics_[i];
5288	delete [] statistics_;
5289	maximumStatistics_ = 0;
5290	statistics_ = NULL;
5291	delete probingInfo_;
5292	probingInfo_ = NULL;
5293	numberFixedAtRoot_ = rhs.numberFixedAtRoot_;
5294	numberFixedNow_ = rhs.numberFixedNow_;
5295	stoppedOnGap_ = rhs.stoppedOnGap_;
5296	eventHappened_ = rhs.eventHappened_;
5297	numberLongStrong_ = rhs.numberLongStrong_;
5298	numberOldActiveCuts_ = rhs.numberOldActiveCuts_;
5299	numberNewCuts_ = rhs.numberNewCuts_;
5300	resolveAfterTakeOffCuts_ = rhs.resolveAfterTakeOffCuts_;
5301	maximumNumberIterations_ = rhs.maximumNumberIterations_;
5302	continuousPriority_ = rhs.continuousPriority_;
5303	numberUpdateItems_ = rhs.numberUpdateItems_;
5304	maximumNumberUpdateItems_ = rhs.maximumNumberUpdateItems_;
5305	delete [] updateItems_;
5306	if (maximumNumberUpdateItems_) {
5307	updateItems_ = new CbcObjectUpdateData [maximumNumberUpdateItems_];
5308	for (i = 0; i < maximumNumberUpdateItems_; i++)
5309	updateItems_[i] = rhs.updateItems_[i];
5310	} else {
5311	updateItems_ = NULL;
5312	}
5313	numberThreads_ = rhs.numberThreads_;
5314	threadMode_ = rhs.threadMode_;
5315	delete master_;
5316	master_ = NULL;
5317	masterThread_ = NULL;
5318	searchStrategy_ = rhs.searchStrategy_;
5319	numberStrongIterations_ = rhs.numberStrongIterations_;
5320	strongInfo_[0] = rhs.strongInfo_[0];
5321	strongInfo_[1] = rhs.strongInfo_[1];
5322	strongInfo_[2] = rhs.strongInfo_[2];
5323	strongInfo_[3] = rhs.strongInfo_[3];
5324	strongInfo_[4] = rhs.strongInfo_[4];
5325	strongInfo_[5] = rhs.strongInfo_[5];
5326	strongInfo_[6] = rhs.strongInfo_[6];
5327	solverCharacteristics_ = NULL;
5328	lastHeuristic_ = NULL;
5329	numberCutGenerators_ = rhs.numberCutGenerators_;
5330	if (numberCutGenerators_) {
5331	generator_ = new CbcCutGenerator * [numberCutGenerators_];
5332	virginGenerator_ = new CbcCutGenerator * [numberCutGenerators_];
5333	int i;
5334	for (i = 0; i < numberCutGenerators_; i++) {
5335	generator_[i] = new CbcCutGenerator(*rhs.generator_[i]);
5336	virginGenerator_[i] = new CbcCutGenerator(*rhs.virginGenerator_[i]);
5337	}
5338	} else {
5339	generator_ = NULL;
5340	virginGenerator_ = NULL;
5341	}
5342	numberHeuristics_ = rhs.numberHeuristics_;
5343	if (numberHeuristics_) {
5344	heuristic_ = new CbcHeuristic * [numberHeuristics_];
5345	memcpy(heuristic_, rhs.heuristic_,
5346	numberHeuristics_sizeof(CbcHeuristic ));
5347	} else {
5348	heuristic_ = NULL;
5349	}
5350	lastHeuristic_ = NULL;
5351	if (eventHandler_)
5352	delete eventHandler_ ;
5353	if (rhs.eventHandler_) {
5354	eventHandler_ = rhs.eventHandler_->clone() ;
5355	} else {
5356	eventHandler_ = NULL ;
5357	}
5358	fastNodeDepth_ = rhs.fastNodeDepth_;
5359	if (ownObjects_) {
5360	for (i = 0; i < numberObjects_; i++)
5361	delete object_[i];
5362	delete [] object_;
5363	numberObjects_ = rhs.numberObjects_;
5364	if (numberObjects_) {
5365	object_ = new OsiObject * [numberObjects_];
5366	int i;
5367	for (i = 0; i < numberObjects_; i++)
5368	object_[i] = (rhs.object_[i])->clone();
5369	} else {
5370	object_ = NULL;
5371	}
5372	} else {
5373	// assume will be redone
5374	numberObjects_ = 0;
5375	object_ = NULL;
5376	}
5377	delete [] originalColumns_;
5378	if (rhs.originalColumns_) {
5379	int numberColumns = rhs.getNumCols();
5380	originalColumns_ = new int [numberColumns];
5381	memcpy(originalColumns_, rhs.originalColumns_, numberColumns*sizeof(int));
5382	} else {
5383	originalColumns_ = NULL;
5384	}