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269 lines
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<div class="headertitle"><div class="title">pseudo_costs.cc</div></div>
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<a href="pseudo__costs_8cc.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">// Copyright 2010-2021 Google LLC</span></div>
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<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment">// Licensed under the Apache License, Version 2.0 (the "License");</span></div>
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<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment">// you may not use this file except in compliance with the License.</span></div>
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<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment">// You may obtain a copy of the License at</span></div>
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<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment">//</span></div>
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<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div>
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<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="comment">//</span></div>
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<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div>
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<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span></div>
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<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div>
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<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="comment">// See the License for the specific language governing permissions and</span></div>
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<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="comment">// limitations under the License.</span></div>
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<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span> </div>
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<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="preprocessor">#include "<a class="code" href="pseudo__costs_8h.html">ortools/sat/pseudo_costs.h</a>"</span></div>
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<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span> </div>
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<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="preprocessor">#include <algorithm></span></div>
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<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="preprocessor">#include <limits></span></div>
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<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="preprocessor">#include <vector></span></div>
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<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span> </div>
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<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="preprocessor">#include "<a class="code" href="base_2logging_8h.html">ortools/base/logging.h</a>"</span></div>
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<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span><span class="preprocessor">#include "<a class="code" href="strong__vector_8h.html">ortools/base/strong_vector.h</a>"</span></div>
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<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span><span class="preprocessor">#include "<a class="code" href="integer_8h.html">ortools/sat/integer.h</a>"</span></div>
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<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span><span class="preprocessor">#include "<a class="code" href="sat_2model_8h.html">ortools/sat/model.h</a>"</span></div>
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<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span><span class="preprocessor">#include "<a class="code" href="sat__base_8h.html">ortools/sat/sat_base.h</a>"</span></div>
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<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span><span class="preprocessor">#include "ortools/sat/sat_parameters.pb.h"</span></div>
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<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span><span class="preprocessor">#include "<a class="code" href="sat_2util_8h.html">ortools/sat/util.h</a>"</span></div>
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<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span><span class="preprocessor">#include "<a class="code" href="strong__integers_8h.html">ortools/util/strong_integers.h</a>"</span></div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> </div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceoperations__research.html">operations_research</a> {</div>
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<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span><span class="keyword">namespace </span>sat {</div>
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<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> </div>
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<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_pseudo_costs.html#a6ac2fad8756d6aaaf1df8e38dac544a4"> 32</a></span><a class="code hl_function" href="classoperations__research_1_1sat_1_1_pseudo_costs.html#a6ac2fad8756d6aaaf1df8e38dac544a4">PseudoCosts::PseudoCosts</a>(<a class="code hl_class" href="classoperations__research_1_1sat_1_1_model.html">Model</a>* <a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>)</div>
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<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> : integer_trail_(*<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1sat_1_1_integer_trail.html">IntegerTrail</a>>()),</div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> parameters_(*<a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<SatParameters>()) {</div>
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<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> <span class="keyword">const</span> <span class="keywordtype">int</span> num_vars = integer_trail_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_integer_trail.html#af88a18429909498405c450015f0a223a">NumIntegerVariables</a>().value();</div>
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<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> pseudo_costs_.resize(num_vars);</div>
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<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span>}</div>
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<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> </div>
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<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span><span class="keywordtype">void</span> PseudoCosts::UpdateCostForVar(IntegerVariable <a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, <span class="keywordtype">double</span> new_cost) {</div>
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<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> <span class="keywordflow">if</span> (<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a> >= pseudo_costs_.size()) {</div>
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<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> <span class="comment">// Create space for new variable and its negation.</span></div>
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<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> <span class="keyword">const</span> <span class="keywordtype">int</span> new_size = <a class="code hl_variable" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#aae43e784db06c0974ce59ebbe8dd2b22">NegationOf</a>(<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>)).value() + 1;</div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> pseudo_costs_.resize(new_size, <a class="code hl_class" href="classoperations__research_1_1sat_1_1_incremental_average.html">IncrementalAverage</a>(0.0));</div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> }</div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> <a class="code hl_define" href="base_2logging_8h.html#ab62f5ed8f2d48e29802be0cbbcd1359a">DCHECK_LT</a>(<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>, pseudo_costs_.size());</div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> pseudo_costs_[<a class="code hl_variable" href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a>].AddData(new_cost);</div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span>}</div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> </div>
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<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_pseudo_costs.html#aa64c6ffef5c1b7402acad774c70bab08"> 49</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_pseudo_costs.html#aa64c6ffef5c1b7402acad774c70bab08">PseudoCosts::UpdateCost</a>(</div>
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<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> <span class="keyword">const</span> std::vector<VariableBoundChange>& bound_changes,</div>
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<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> <span class="keyword">const</span> IntegerValue obj_bound_improvement) {</div>
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<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> <a class="code hl_define" href="base_2logging_8h.html#aae2dc65d9ea248d54bf39daa986dd295">DCHECK_GE</a>(obj_bound_improvement, 0);</div>
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<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> <span class="keywordflow">if</span> (obj_bound_improvement == IntegerValue(0)) <span class="keywordflow">return</span>;</div>
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<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> </div>
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<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> <a class="code hl_struct" href="structoperations__research_1_1sat_1_1_pseudo_costs_1_1_variable_bound_change.html">VariableBoundChange</a>& decision : bound_changes) {</div>
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<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> <span class="keywordflow">if</span> (integer_trail_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_integer_trail.html#a309d057e12c8d4d393f13975eea2e2a9">IsCurrentlyIgnored</a>(decision.var)) <span class="keywordflow">continue</span>;</div>
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<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> <span class="keywordflow">if</span> (decision.lower_bound_change == IntegerValue(0)) <span class="keywordflow">continue</span>;</div>
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<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> </div>
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<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> <span class="keyword">const</span> <span class="keywordtype">double</span> current_pseudo_cost =</div>
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<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#aed77a1a7675c2f8568529a5a16247ec1">ToDouble</a>(obj_bound_improvement) / <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#aed77a1a7675c2f8568529a5a16247ec1">ToDouble</a>(decision.lower_bound_change);</div>
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<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> UpdateCostForVar(decision.var, current_pseudo_cost);</div>
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<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> }</div>
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<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span>}</div>
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<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> </div>
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<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_pseudo_costs.html#a00b4cae523b9f6efc893ef55e1d76848"> 65</a></span>IntegerVariable <a class="code hl_function" href="classoperations__research_1_1sat_1_1_pseudo_costs.html#a00b4cae523b9f6efc893ef55e1d76848">PseudoCosts::GetBestDecisionVar</a>() {</div>
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<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> <span class="keywordflow">if</span> (pseudo_costs_.empty()) <span class="keywordflow">return</span> <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#a5bd8c44473618b7eafd33ba978db2f06">kNoIntegerVariable</a>;</div>
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<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> </div>
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<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> <span class="keyword">const</span> <span class="keywordtype">double</span> epsilon = 1e-6;</div>
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<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> </div>
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<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> <span class="keywordtype">double</span> best_cost = -std::numeric_limits<double>::infinity();</div>
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<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> IntegerVariable chosen_var = <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#a5bd8c44473618b7eafd33ba978db2f06">kNoIntegerVariable</a>;</div>
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<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> </div>
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<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> <span class="keywordflow">for</span> (IntegerVariable positive_var(0); positive_var < pseudo_costs_.size();</div>
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<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> positive_var += 2) {</div>
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<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> <span class="keyword">const</span> IntegerVariable negative_var = <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#aae43e784db06c0974ce59ebbe8dd2b22">NegationOf</a>(positive_var);</div>
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<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> <span class="keywordflow">if</span> (integer_trail_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_integer_trail.html#a309d057e12c8d4d393f13975eea2e2a9">IsCurrentlyIgnored</a>(positive_var)) <span class="keywordflow">continue</span>;</div>
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<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> <span class="keyword">const</span> IntegerValue lb = integer_trail_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_integer_trail.html#ab857cd2aead68952d9fe92a8ad8d3ac9">LowerBound</a>(positive_var);</div>
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<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> <span class="keyword">const</span> IntegerValue ub = integer_trail_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_integer_trail.html#a8b6d5a25e6ad3d28a85b1924471e2cac">UpperBound</a>(positive_var);</div>
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<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> <span class="keywordflow">if</span> (lb >= ub) <span class="keywordflow">continue</span>;</div>
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<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> <span class="keywordflow">if</span> (<a class="code hl_function" href="classoperations__research_1_1sat_1_1_pseudo_costs.html#a039f2246b9fc08fc5f585cfb8d661b19">GetRecordings</a>(positive_var) + <a class="code hl_function" href="classoperations__research_1_1sat_1_1_pseudo_costs.html#a039f2246b9fc08fc5f585cfb8d661b19">GetRecordings</a>(negative_var) <</div>
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<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> parameters_.pseudo_cost_reliability_threshold()) {</div>
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<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> <span class="keywordflow">continue</span>;</div>
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<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> }</div>
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<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> </div>
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<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> <span class="comment">// TODO(user): Experiment with different ways to merge the costs.</span></div>
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<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> <span class="keyword">const</span> <span class="keywordtype">double</span> current_merged_cost =</div>
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<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> <a class="code hl_variable" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(<a class="code hl_function" href="classoperations__research_1_1sat_1_1_pseudo_costs.html#acf4e4390ebb348125b8300b3d065ddd5">GetCost</a>(positive_var), epsilon) *</div>
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<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> <a class="code hl_variable" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(<a class="code hl_function" href="classoperations__research_1_1sat_1_1_pseudo_costs.html#acf4e4390ebb348125b8300b3d065ddd5">GetCost</a>(negative_var), epsilon);</div>
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<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> </div>
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<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> <span class="keywordflow">if</span> (current_merged_cost > best_cost) {</div>
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<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> chosen_var = positive_var;</div>
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<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> best_cost = current_merged_cost;</div>
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<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> }</div>
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<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> }</div>
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<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> </div>
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<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> <span class="comment">// Pick the direction with best pseudo cost.</span></div>
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<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> <span class="keywordflow">if</span> (chosen_var != <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#a5bd8c44473618b7eafd33ba978db2f06">kNoIntegerVariable</a> &&</div>
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<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_pseudo_costs.html#acf4e4390ebb348125b8300b3d065ddd5">GetCost</a>(chosen_var) < <a class="code hl_function" href="classoperations__research_1_1sat_1_1_pseudo_costs.html#acf4e4390ebb348125b8300b3d065ddd5">GetCost</a>(<a class="code hl_function" href="namespaceoperations__research_1_1sat.html#aae43e784db06c0974ce59ebbe8dd2b22">NegationOf</a>(chosen_var))) {</div>
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<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> chosen_var = <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#aae43e784db06c0974ce59ebbe8dd2b22">NegationOf</a>(chosen_var);</div>
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<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span> }</div>
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<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> <span class="keywordflow">return</span> chosen_var;</div>
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<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span>}</div>
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<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> </div>
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<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"><a class="line" href="namespaceoperations__research_1_1sat.html#a98bb3bb08c5a9f5c119cf0973bbe5cf8"> 104</a></span>std::vector<PseudoCosts::VariableBoundChange> <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#a98bb3bb08c5a9f5c119cf0973bbe5cf8">GetBoundChanges</a>(</div>
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<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> LiteralIndex decision, <a class="code hl_class" href="classoperations__research_1_1sat_1_1_model.html">Model</a>* <a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>) {</div>
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<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> std::vector<PseudoCosts::VariableBoundChange> bound_changes;</div>
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<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> <span class="keywordflow">if</span> (decision == <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#a2dbcb7017d468a17bdb30252af5c6c31">kNoLiteralIndex</a>) <span class="keywordflow">return</span> bound_changes;</div>
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<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> <span class="keyword">auto</span>* encoder = <a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1sat_1_1_integer_encoder.html">IntegerEncoder</a>>();</div>
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<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> <span class="keyword">auto</span>* integer_trail = <a class="code hl_variable" href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a>->GetOrCreate<<a class="code hl_class" href="classoperations__research_1_1sat_1_1_integer_trail.html">IntegerTrail</a>>();</div>
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<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> <span class="comment">// NOTE: We ignore negation of equality decisions.</span></div>
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<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> <a class="code hl_struct" href="structoperations__research_1_1sat_1_1_integer_literal.html">IntegerLiteral</a> l :</div>
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<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> encoder->GetAllIntegerLiterals(<a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a>(decision))) {</div>
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<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> <span class="keywordflow">if</span> (l.var == <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#a5bd8c44473618b7eafd33ba978db2f06">kNoIntegerVariable</a>) <span class="keywordflow">continue</span>;</div>
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<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> <span class="keywordflow">if</span> (integer_trail->IsCurrentlyIgnored(l.var)) <span class="keywordflow">continue</span>;</div>
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<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> <a class="code hl_struct" href="structoperations__research_1_1sat_1_1_pseudo_costs_1_1_variable_bound_change.html">PseudoCosts::VariableBoundChange</a> var_bound_change;</div>
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<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> var_bound_change.<a class="code hl_variable" href="structoperations__research_1_1sat_1_1_pseudo_costs_1_1_variable_bound_change.html#ab6516f556b715738034b30d290c40214">var</a> = l.var;</div>
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<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> var_bound_change.<a class="code hl_variable" href="structoperations__research_1_1sat_1_1_pseudo_costs_1_1_variable_bound_change.html#a5fcd8a2a6dc182482852a554e9d73af9">lower_bound_change</a> =</div>
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<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> l.bound - integer_trail->LowerBound(l.var);</div>
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<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> bound_changes.push_back(var_bound_change);</div>
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<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> }</div>
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<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> </div>
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<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> <span class="keywordflow">return</span> bound_changes;</div>
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<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span>}</div>
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<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> </div>
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<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span>} <span class="comment">// namespace sat</span></div>
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<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span>} <span class="comment">// namespace operations_research</span></div>
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<div class="ttc" id="aalldiff__cst_8cc_html_a26e6db9bcc64b584051ecc28171ed11f"><div class="ttname"><a href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">max</a></div><div class="ttdeci">int64_t max</div><div class="ttdef"><b>Definition:</b> <a href="alldiff__cst_8cc_source.html#l00140">alldiff_cst.cc:140</a></div></div>
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<div class="ttc" id="abase_2logging_8h_html"><div class="ttname"><a href="base_2logging_8h.html">logging.h</a></div></div>
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<div class="ttc" id="abase_2logging_8h_html_aae2dc65d9ea248d54bf39daa986dd295"><div class="ttname"><a href="base_2logging_8h.html#aae2dc65d9ea248d54bf39daa986dd295">DCHECK_GE</a></div><div class="ttdeci">#define DCHECK_GE(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00895">base/logging.h:895</a></div></div>
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<div class="ttc" id="abase_2logging_8h_html_ab62f5ed8f2d48e29802be0cbbcd1359a"><div class="ttname"><a href="base_2logging_8h.html#ab62f5ed8f2d48e29802be0cbbcd1359a">DCHECK_LT</a></div><div class="ttdeci">#define DCHECK_LT(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00894">base/logging.h:894</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_incremental_average_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_incremental_average.html">operations_research::sat::IncrementalAverage</a></div><div class="ttdef"><b>Definition:</b> <a href="sat_2util_8h_source.html#l00183">sat/util.h:183</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_integer_encoder_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_integer_encoder.html">operations_research::sat::IntegerEncoder</a></div><div class="ttdef"><b>Definition:</b> <a href="integer_8h_source.html#l00362">integer.h:362</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_integer_trail_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_integer_trail.html">operations_research::sat::IntegerTrail</a></div><div class="ttdef"><b>Definition:</b> <a href="integer_8h_source.html#l00620">integer.h:620</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_integer_trail_html_a309d057e12c8d4d393f13975eea2e2a9"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_integer_trail.html#a309d057e12c8d4d393f13975eea2e2a9">operations_research::sat::IntegerTrail::IsCurrentlyIgnored</a></div><div class="ttdeci">bool IsCurrentlyIgnored(IntegerVariable i) const</div><div class="ttdef"><b>Definition:</b> <a href="integer_8h_source.html#l00705">integer.h:705</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_integer_trail_html_a8b6d5a25e6ad3d28a85b1924471e2cac"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_integer_trail.html#a8b6d5a25e6ad3d28a85b1924471e2cac">operations_research::sat::IntegerTrail::UpperBound</a></div><div class="ttdeci">IntegerValue UpperBound(IntegerVariable i) const</div><div class="ttdef"><b>Definition:</b> <a href="integer_8h_source.html#l01449">integer.h:1449</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_integer_trail_html_ab857cd2aead68952d9fe92a8ad8d3ac9"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_integer_trail.html#ab857cd2aead68952d9fe92a8ad8d3ac9">operations_research::sat::IntegerTrail::LowerBound</a></div><div class="ttdeci">IntegerValue LowerBound(IntegerVariable i) const</div><div class="ttdef"><b>Definition:</b> <a href="integer_8h_source.html#l01445">integer.h:1445</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_integer_trail_html_af88a18429909498405c450015f0a223a"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_integer_trail.html#af88a18429909498405c450015f0a223a">operations_research::sat::IntegerTrail::NumIntegerVariables</a></div><div class="ttdeci">IntegerVariable NumIntegerVariables() const</div><div class="ttdef"><b>Definition:</b> <a href="integer_8h_source.html#l00645">integer.h:645</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_literal_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_literal.html">operations_research::sat::Literal</a></div><div class="ttdef"><b>Definition:</b> <a href="sat__base_8h_source.html#l00067">sat_base.h:67</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_model_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_model.html">operations_research::sat::Model</a></div><div class="ttdoc">Class that owns everything related to a particular optimization model.</div><div class="ttdef"><b>Definition:</b> <a href="sat_2model_8h_source.html#l00042">sat/model.h:42</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_pseudo_costs_html_a00b4cae523b9f6efc893ef55e1d76848"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_pseudo_costs.html#a00b4cae523b9f6efc893ef55e1d76848">operations_research::sat::PseudoCosts::GetBestDecisionVar</a></div><div class="ttdeci">IntegerVariable GetBestDecisionVar()</div><div class="ttdef"><b>Definition:</b> <a href="pseudo__costs_8cc_source.html#l00065">pseudo_costs.cc:65</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_pseudo_costs_html_a039f2246b9fc08fc5f585cfb8d661b19"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_pseudo_costs.html#a039f2246b9fc08fc5f585cfb8d661b19">operations_research::sat::PseudoCosts::GetRecordings</a></div><div class="ttdeci">int GetRecordings(IntegerVariable var) const</div><div class="ttdef"><b>Definition:</b> <a href="pseudo__costs_8h_source.html#l00058">pseudo_costs.h:58</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_pseudo_costs_html_a6ac2fad8756d6aaaf1df8e38dac544a4"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_pseudo_costs.html#a6ac2fad8756d6aaaf1df8e38dac544a4">operations_research::sat::PseudoCosts::PseudoCosts</a></div><div class="ttdeci">PseudoCosts(Model *model)</div><div class="ttdef"><b>Definition:</b> <a href="pseudo__costs_8cc_source.html#l00032">pseudo_costs.cc:32</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_pseudo_costs_html_aa64c6ffef5c1b7402acad774c70bab08"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_pseudo_costs.html#aa64c6ffef5c1b7402acad774c70bab08">operations_research::sat::PseudoCosts::UpdateCost</a></div><div class="ttdeci">void UpdateCost(const std::vector< VariableBoundChange > &bound_changes, IntegerValue obj_bound_improvement)</div><div class="ttdef"><b>Definition:</b> <a href="pseudo__costs_8cc_source.html#l00049">pseudo_costs.cc:49</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_pseudo_costs_html_acf4e4390ebb348125b8300b3d065ddd5"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_pseudo_costs.html#acf4e4390ebb348125b8300b3d065ddd5">operations_research::sat::PseudoCosts::GetCost</a></div><div class="ttdeci">double GetCost(IntegerVariable var) const</div><div class="ttdef"><b>Definition:</b> <a href="pseudo__costs_8h_source.html#l00051">pseudo_costs.h:51</a></div></div>
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<div class="ttc" id="aexpr__array_8cc_html_a472a99923cbe11ae7b5a5d157d9ad465"><div class="ttname"><a href="expr__array_8cc.html#a472a99923cbe11ae7b5a5d157d9ad465">var</a></div><div class="ttdeci">IntVar * var</div><div class="ttdef"><b>Definition:</b> <a href="expr__array_8cc_source.html#l01874">expr_array.cc:1874</a></div></div>
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<div class="ttc" id="agurobi__interface_8cc_html_a0728f23c9a47655d38e0bf1a2f200bcf"><div class="ttname"><a href="gurobi__interface_8cc.html#a0728f23c9a47655d38e0bf1a2f200bcf">model</a></div><div class="ttdeci">GRBmodel * model</div><div class="ttdef"><b>Definition:</b> <a href="gurobi__interface_8cc_source.html#l00274">gurobi_interface.cc:274</a></div></div>
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<div class="ttc" id="ainteger_8h_html"><div class="ttname"><a href="integer_8h.html">integer.h</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_1_1sat_html_a2dbcb7017d468a17bdb30252af5c6c31"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a2dbcb7017d468a17bdb30252af5c6c31">operations_research::sat::kNoLiteralIndex</a></div><div class="ttdeci">const LiteralIndex kNoLiteralIndex(-1)</div></div>
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<div class="ttc" id="anamespaceoperations__research_1_1sat_html_a5bd8c44473618b7eafd33ba978db2f06"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a5bd8c44473618b7eafd33ba978db2f06">operations_research::sat::kNoIntegerVariable</a></div><div class="ttdeci">const IntegerVariable kNoIntegerVariable(-1)</div></div>
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<div class="ttc" id="anamespaceoperations__research_1_1sat_html_a98bb3bb08c5a9f5c119cf0973bbe5cf8"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a98bb3bb08c5a9f5c119cf0973bbe5cf8">operations_research::sat::GetBoundChanges</a></div><div class="ttdeci">std::vector< PseudoCosts::VariableBoundChange > GetBoundChanges(LiteralIndex decision, Model *model)</div><div class="ttdef"><b>Definition:</b> <a href="pseudo__costs_8cc_source.html#l00104">pseudo_costs.cc:104</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_1_1sat_html_aae43e784db06c0974ce59ebbe8dd2b22"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#aae43e784db06c0974ce59ebbe8dd2b22">operations_research::sat::NegationOf</a></div><div class="ttdeci">std::vector< IntegerVariable > NegationOf(const std::vector< IntegerVariable > &vars)</div><div class="ttdef"><b>Definition:</b> <a href="integer_8cc_source.html#l00047">integer.cc:47</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_1_1sat_html_aed77a1a7675c2f8568529a5a16247ec1"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#aed77a1a7675c2f8568529a5a16247ec1">operations_research::sat::ToDouble</a></div><div class="ttdeci">double ToDouble(IntegerValue value)</div><div class="ttdef"><b>Definition:</b> <a href="integer_8h_source.html#l00077">integer.h:77</a></div></div>
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