1 | // Copyright (C) 2004, International Business Machines |
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2 | // Corporation and others. All Rights Reserved. |
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3 | #if defined(_MSC_VER) |
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4 | // Turn off compiler warning about long names |
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5 | # pragma warning(disable:4786) |
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6 | #endif |
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7 | #include <cassert> |
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8 | #include <cmath> |
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9 | #include <cfloat> |
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10 | //#define CBC_DEBUG |
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11 | |
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12 | #include "CbcMessage.hpp" |
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13 | #include "CbcModel.hpp" |
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14 | #include "CbcTree.hpp" |
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15 | #include "CbcCompareActual.hpp" |
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16 | #include "CoinError.hpp" |
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17 | |
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18 | |
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19 | /** Default Constructor |
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20 | |
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21 | */ |
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22 | CbcCompareDepth::CbcCompareDepth () |
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23 | : CbcCompareBase() |
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24 | { |
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25 | test_=this; |
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26 | } |
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27 | |
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28 | // Copy constructor |
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29 | CbcCompareDepth::CbcCompareDepth ( const CbcCompareDepth & rhs) |
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30 | :CbcCompareBase(rhs) |
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31 | |
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32 | { |
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33 | } |
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34 | |
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35 | // Clone |
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36 | CbcCompareBase * |
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37 | CbcCompareDepth::clone() const |
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38 | { |
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39 | return new CbcCompareDepth(*this); |
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40 | } |
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41 | |
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42 | // Assignment operator |
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43 | CbcCompareDepth & |
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44 | CbcCompareDepth::operator=( const CbcCompareDepth& rhs) |
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45 | { |
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46 | if (this!=&rhs) { |
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47 | CbcCompareBase::operator=(rhs); |
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48 | } |
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49 | return *this; |
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50 | } |
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51 | |
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52 | // Destructor |
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53 | CbcCompareDepth::~CbcCompareDepth () |
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54 | { |
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55 | } |
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56 | |
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57 | // Returns true if y better than x |
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58 | bool |
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59 | CbcCompareDepth::test (CbcNode * x, CbcNode * y) |
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60 | { |
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61 | return x->depth() < y->depth(); |
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62 | } |
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63 | |
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64 | /** Default Constructor |
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65 | |
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66 | */ |
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67 | CbcCompareObjective::CbcCompareObjective () |
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68 | : CbcCompareBase() |
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69 | { |
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70 | test_=this; |
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71 | } |
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72 | |
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73 | // Copy constructor |
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74 | CbcCompareObjective::CbcCompareObjective ( const CbcCompareObjective & rhs) |
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75 | :CbcCompareBase(rhs) |
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76 | |
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77 | { |
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78 | } |
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79 | |
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80 | // Clone |
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81 | CbcCompareBase * |
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82 | CbcCompareObjective::clone() const |
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83 | { |
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84 | return new CbcCompareObjective(*this); |
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85 | } |
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86 | |
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87 | // Assignment operator |
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88 | CbcCompareObjective & |
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89 | CbcCompareObjective::operator=( const CbcCompareObjective& rhs) |
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90 | { |
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91 | if (this!=&rhs) { |
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92 | CbcCompareBase::operator=(rhs); |
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93 | } |
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94 | return *this; |
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95 | } |
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96 | |
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97 | // Destructor |
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98 | CbcCompareObjective::~CbcCompareObjective () |
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99 | { |
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100 | } |
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101 | |
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102 | // Returns true if y better than x |
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103 | bool |
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104 | CbcCompareObjective::test (CbcNode * x, CbcNode * y) |
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105 | { |
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106 | return x->objectiveValue() > y->objectiveValue(); |
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107 | } |
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108 | |
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109 | /** Default Constructor |
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110 | |
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111 | */ |
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112 | CbcCompareDefault::CbcCompareDefault () |
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113 | : CbcCompareBase(), |
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114 | weight_(-1.0), |
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115 | saveWeight_(0.0), |
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116 | numberSolutions_(0), |
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117 | treeSize_(0) |
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118 | { |
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119 | test_=this; |
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120 | } |
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121 | |
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122 | // Constructor with weight |
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123 | CbcCompareDefault::CbcCompareDefault (double weight) |
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124 | : CbcCompareBase(), |
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125 | weight_(weight) , |
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126 | saveWeight_(0.0), |
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127 | numberSolutions_(0), |
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128 | treeSize_(0) |
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129 | { |
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130 | test_=this; |
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131 | } |
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132 | |
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133 | |
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134 | // Copy constructor |
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135 | CbcCompareDefault::CbcCompareDefault ( const CbcCompareDefault & rhs) |
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136 | :CbcCompareBase(rhs) |
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137 | |
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138 | { |
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139 | weight_=rhs.weight_; |
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140 | saveWeight_ = rhs.saveWeight_; |
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141 | numberSolutions_=rhs.numberSolutions_; |
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142 | treeSize_ = rhs.treeSize_; |
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143 | } |
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144 | |
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145 | // Clone |
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146 | CbcCompareBase * |
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147 | CbcCompareDefault::clone() const |
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148 | { |
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149 | return new CbcCompareDefault(*this); |
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150 | } |
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151 | |
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152 | // Assignment operator |
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153 | CbcCompareDefault & |
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154 | CbcCompareDefault::operator=( const CbcCompareDefault& rhs) |
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155 | { |
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156 | if (this!=&rhs) { |
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157 | CbcCompareBase::operator=(rhs); |
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158 | weight_=rhs.weight_; |
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159 | saveWeight_ = rhs.saveWeight_; |
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160 | numberSolutions_=rhs.numberSolutions_; |
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161 | treeSize_ = rhs.treeSize_; |
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162 | } |
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163 | return *this; |
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164 | } |
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165 | |
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166 | // Destructor |
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167 | CbcCompareDefault::~CbcCompareDefault () |
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168 | { |
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169 | } |
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170 | |
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171 | // Returns true if y better than x |
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172 | bool |
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173 | CbcCompareDefault::test (CbcNode * x, CbcNode * y) |
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174 | { |
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175 | #if 0 |
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176 | // was |
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177 | if (weight_<0.0||treeSize_>100000) { |
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178 | // before solution |
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179 | /* printf("x %d %d %g, y %d %d %g\n", |
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180 | x->numberUnsatisfied(),x->depth(),x->objectiveValue(), |
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181 | y->numberUnsatisfied(),y->depth(),y->objectiveValue()); */ |
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182 | if (x->numberUnsatisfied() > y->numberUnsatisfied()) |
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183 | return true; |
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184 | else if (x->numberUnsatisfied() < y->numberUnsatisfied()) |
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185 | return false; |
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186 | else |
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187 | return x->depth() < y->depth(); |
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188 | } else { |
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189 | // after solution |
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190 | return x->objectiveValue()+ weight_*x->numberUnsatisfied() > |
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191 | y->objectiveValue() + weight_*y->numberUnsatisfied(); |
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192 | } |
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193 | #else |
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194 | if (weight_==-1.0&&(y->depth()>7||x->depth()>7)) { |
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195 | // before solution |
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196 | /* printf("x %d %d %g, y %d %d %g\n", |
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197 | x->numberUnsatisfied(),x->depth(),x->objectiveValue(), |
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198 | y->numberUnsatisfied(),y->depth(),y->objectiveValue()); */ |
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199 | if (x->numberUnsatisfied() > y->numberUnsatisfied()) |
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200 | return true; |
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201 | else if (x->numberUnsatisfied() < y->numberUnsatisfied()) |
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202 | return false; |
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203 | else |
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204 | return x->depth() < y->depth(); |
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205 | } else { |
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206 | // after solution |
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207 | double weight = CoinMax(weight_,0.0); |
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208 | return x->objectiveValue()+ weight*x->numberUnsatisfied() > |
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209 | y->objectiveValue() + weight*y->numberUnsatisfied(); |
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210 | } |
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211 | #endif |
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212 | } |
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213 | // This allows method to change behavior as it is called |
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214 | // after each solution |
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215 | void |
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216 | CbcCompareDefault::newSolution(CbcModel * model, |
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217 | double objectiveAtContinuous, |
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218 | int numberInfeasibilitiesAtContinuous) |
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219 | { |
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220 | if (model->getSolutionCount()==model->getNumberHeuristicSolutions()&& |
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221 | model->getSolutionCount()<5&&model->getNodeCount()<500) |
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222 | return; // solution was got by rounding |
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223 | // set to get close to this solution |
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224 | double costPerInteger = |
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225 | (model->getObjValue()-objectiveAtContinuous)/ |
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226 | ((double) numberInfeasibilitiesAtContinuous); |
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227 | weight_ = 0.95*costPerInteger; |
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228 | saveWeight_ = 0.95*weight_; |
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229 | numberSolutions_++; |
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230 | if (numberSolutions_>5) |
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231 | weight_ =0.0; // this searches on objective |
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232 | } |
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233 | // This allows method to change behavior |
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234 | bool |
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235 | CbcCompareDefault::every1000Nodes(CbcModel * model, int numberNodes) |
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236 | { |
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237 | #if 0 |
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238 | // was |
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239 | if (numberNodes>10000) |
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240 | weight_ =0.0; // this searches on objective |
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241 | // get size of tree |
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242 | treeSize_ = model->tree()->size(); |
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243 | #else |
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244 | double saveWeight=weight_; |
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245 | int numberNodes1000 = numberNodes/1000; |
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246 | if (numberNodes>10000) { |
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247 | weight_ =0.0; // this searches on objective |
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248 | // but try a bit of other stuff |
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249 | if ((numberNodes1000%4)==1) |
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250 | weight_=saveWeight_; |
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251 | } else if (numberNodes==1000&&weight_==-2.0) { |
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252 | weight_=-1.0; // Go to depth first |
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253 | } |
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254 | // get size of tree |
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255 | treeSize_ = model->tree()->size(); |
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256 | if (treeSize_>10000) { |
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257 | int n1 = model->solver()->getNumRows()+model->solver()->getNumCols(); |
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258 | int n2 = model->numberObjects(); |
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259 | double size = n1*0.1 + n2*2.0; |
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260 | // set weight to reduce size most of time |
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261 | if (treeSize_*size>5.0e7) |
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262 | weight_=-1.0; |
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263 | else if ((numberNodes1000%4)==0&&treeSize_*size>1.0e6) |
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264 | weight_=-1.0; |
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265 | else if ((numberNodes1000%4)==1) |
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266 | weight_=0.0; |
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267 | else |
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268 | weight_=saveWeight_; |
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269 | } |
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270 | #endif |
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271 | //return numberNodes==11000; // resort if first time |
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272 | return (weight_!=saveWeight); |
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273 | } |
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274 | |
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275 | /** Default Constructor |
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276 | |
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277 | */ |
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278 | CbcCompareEstimate::CbcCompareEstimate () |
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279 | : CbcCompareBase() |
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280 | { |
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281 | test_=this; |
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282 | } |
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283 | |
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284 | // Copy constructor |
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285 | CbcCompareEstimate::CbcCompareEstimate ( const CbcCompareEstimate & rhs) |
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286 | :CbcCompareBase(rhs) |
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287 | |
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288 | { |
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289 | } |
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290 | |
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291 | // Clone |
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292 | CbcCompareBase * |
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293 | CbcCompareEstimate::clone() const |
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294 | { |
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295 | return new CbcCompareEstimate(*this); |
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296 | } |
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297 | |
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298 | // Assignment operator |
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299 | CbcCompareEstimate & |
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300 | CbcCompareEstimate::operator=( const CbcCompareEstimate& rhs) |
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301 | { |
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302 | if (this!=&rhs) { |
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303 | CbcCompareBase::operator=(rhs); |
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304 | } |
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305 | return *this; |
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306 | } |
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307 | |
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308 | // Destructor |
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309 | CbcCompareEstimate::~CbcCompareEstimate () |
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310 | { |
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311 | } |
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312 | |
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313 | // Returns true if y better than x |
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314 | bool |
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315 | CbcCompareEstimate::test (CbcNode * x, CbcNode * y) |
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316 | { |
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317 | return x->guessedObjectiveValue() > y->guessedObjectiveValue() ; |
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318 | } |
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319 | |
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