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<a href="drat__checker_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="drat__checker_8h.html">ortools/sat/drat_checker.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 <stddef.h></span></div>
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<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span> </div>
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<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="preprocessor">#include <algorithm></span></div>
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<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span><span class="preprocessor">#include <cmath></span></div>
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<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="preprocessor">#include <cstdint></span></div>
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<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span><span class="preprocessor">#include <fstream></span></div>
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<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span><span class="preprocessor">#include <limits></span></div>
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<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span><span class="preprocessor">#include <string></span></div>
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<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span><span class="preprocessor">#include <utility></span></div>
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<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span><span class="preprocessor">#include <vector></span></div>
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<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> </div>
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<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span><span class="preprocessor">#include "absl/container/flat_hash_set.h"</span></div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span><span class="preprocessor">#include "absl/strings/numbers.h"</span></div>
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<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span><span class="preprocessor">#include "absl/strings/str_split.h"</span></div>
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<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span><span class="preprocessor">#include "absl/strings/string_view.h"</span></div>
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<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span><span class="preprocessor">#include "absl/time/clock.h"</span></div>
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<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span><span class="preprocessor">#include "absl/types/span.h"</span></div>
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<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span><span class="preprocessor">#include "<a class="code" href="hash_8h.html">ortools/base/hash.h</a>"</span></div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</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="l00035" name="l00035"></a><span class="lineno"> 35</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="l00036" name="l00036"></a><span class="lineno"> 36</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="l00037" name="l00037"></a><span class="lineno"> 37</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="l00038" name="l00038"></a><span class="lineno"> 38</span><span class="preprocessor">#include "<a class="code" href="time__limit_8h.html">ortools/util/time_limit.h</a>"</span></div>
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<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> </div>
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<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</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="l00041" name="l00041"></a><span class="lineno"> 41</span><span class="keyword">namespace </span>sat {</div>
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<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> </div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span>DratChecker::Clause::Clause(<span class="keywordtype">int</span> first_literal_index, <span class="keywordtype">int</span> num_literals)</div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> : first_literal_index(first_literal_index), num_literals(num_literals) {}</div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> </div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span>std::size_t DratChecker::ClauseHash::operator()(</div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> <span class="keyword">const</span> ClauseIndex clause_index)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> <span class="keywordtype">size_t</span> <a class="code hl_variable" href="matrix__utils_8cc.html#a95d4078c018ac04247ee3785eab30e7b">hash</a> = 0;</div>
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<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> <span class="keywordflow">for</span> (Literal <a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : checker->Literals(checker->clauses_[clause_index])) {</div>
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<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> <a class="code hl_variable" href="matrix__utils_8cc.html#a95d4078c018ac04247ee3785eab30e7b">hash</a> = <a class="code hl_function" href="namespaceutil__hash.html#a17715af1c1bc575a706eb167371b81e9">util_hash::Hash</a>(<a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>.Index().value(), <a class="code hl_variable" href="matrix__utils_8cc.html#a95d4078c018ac04247ee3785eab30e7b">hash</a>);</div>
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<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> }</div>
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<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> <span class="keywordflow">return</span> <a class="code hl_variable" href="matrix__utils_8cc.html#a95d4078c018ac04247ee3785eab30e7b">hash</a>;</div>
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<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</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="keywordtype">bool</span> DratChecker::ClauseEquiv::operator()(</div>
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<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> <span class="keyword">const</span> ClauseIndex clause_index1, <span class="keyword">const</span> ClauseIndex clause_index2)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> <span class="keywordflow">return</span> checker->Literals(checker->clauses_[clause_index1]) ==</div>
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<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> checker->Literals(checker->clauses_[clause_index2]);</div>
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<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span>}</div>
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<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> </div>
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<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_drat_checker.html#a3f58879e6c01aae405b9dea727109645"> 61</a></span>DratChecker::DratChecker()</div>
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<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> : first_infered_clause_index_(<a class="code hl_function" href="namespaceoperations__research_1_1sat.html#affcb42181de5b23ba7b5df37fe1676a3">kNoClauseIndex</a>),</div>
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<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> clause_set_(0, ClauseHash(this), ClauseEquiv(this)),</div>
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<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> num_variables_(0) {}</div>
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<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> </div>
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<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span><span class="keywordtype">bool</span> DratChecker::Clause::IsDeleted(ClauseIndex clause_index)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> <span class="keywordflow">return</span> deleted_index <= clause_index;</div>
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<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span>}</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"><a class="line" href="classoperations__research_1_1sat_1_1_drat_checker.html#a54bb4f51333a0efceaf20de7b506e4ab"> 70</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_drat_checker.html#a54bb4f51333a0efceaf20de7b506e4ab">DratChecker::AddProblemClause</a>(absl::Span<const Literal> clause) {</div>
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<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> <a class="code hl_define" href="base_2logging_8h.html#ae89df3243bbb8341130c7b3f44145ea0">DCHECK_EQ</a>(first_infered_clause_index_, <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#affcb42181de5b23ba7b5df37fe1676a3">kNoClauseIndex</a>);</div>
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<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> <span class="keyword">const</span> ClauseIndex clause_index = AddClause(clause);</div>
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<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> </div>
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<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> <span class="keyword">const</span> <span class="keyword">auto</span> it = clause_set_.find(clause_index);</div>
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<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> <span class="keywordflow">if</span> (it != clause_set_.end()) {</div>
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<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> clauses_[*it].num_copies += 1;</div>
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<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> RemoveLastClause();</div>
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<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> } <span class="keywordflow">else</span> {</div>
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<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> clause_set_.insert(clause_index);</div>
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<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> }</div>
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<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span>}</div>
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<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> </div>
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<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_drat_checker.html#a10d374b75761a0418a217cdcf2e89ae4"> 83</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_drat_checker.html#a10d374b75761a0418a217cdcf2e89ae4">DratChecker::AddInferedClause</a>(absl::Span<const Literal> clause) {</div>
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<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> <span class="keyword">const</span> ClauseIndex infered_clause_index = AddClause(clause);</div>
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<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> <span class="keywordflow">if</span> (first_infered_clause_index_ == <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#affcb42181de5b23ba7b5df37fe1676a3">kNoClauseIndex</a>) {</div>
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<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> first_infered_clause_index_ = infered_clause_index;</div>
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<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> }</div>
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<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> </div>
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<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> <span class="keyword">const</span> <span class="keyword">auto</span> it = clause_set_.find(infered_clause_index);</div>
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<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> <span class="keywordflow">if</span> (it != clause_set_.end()) {</div>
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<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> clauses_[*it].num_copies += 1;</div>
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<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> <span class="keywordflow">if</span> (*it >= first_infered_clause_index_ && !clause.empty()) {</div>
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<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> <a class="code hl_define" href="base_2logging_8h.html#a7c0ce053b28d53aa4eaf3eb7fb71663b">CHECK_EQ</a>(clauses_[*it].rat_literal_index, clause[0].<a class="code hl_typedef" href="namespaceoperations__research_1_1glop.html#ac89c7b45754e9a6bdabc08bea586fc4e">Index</a>());</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> RemoveLastClause();</div>
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<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> } <span class="keywordflow">else</span> {</div>
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<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> clauses_[infered_clause_index].rat_literal_index =</div>
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<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> clause.<a class="code hl_function" href="classabsl_1_1_strong_vector.html#a644718bb2fb240de962dc3c9a1fdf0dc">empty</a>() ? <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#a2dbcb7017d468a17bdb30252af5c6c31">kNoLiteralIndex</a> : clause[0].Index();</div>
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<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> clause_set_.insert(infered_clause_index);</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>}</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>ClauseIndex DratChecker::AddClause(absl::Span<const Literal> clause) {</div>
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<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> <span class="keyword">const</span> <span class="keywordtype">int</span> first_literal_index = literals_.size();</div>
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<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> literals_.insert(literals_.end(), clause.begin(), clause.end());</div>
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<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> <span class="comment">// Sort the input clause in strictly increasing order (by sorting and then</span></div>
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<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> <span class="comment">// removing the duplicate literals).</span></div>
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<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> std::sort(literals_.begin() + first_literal_index, literals_.end());</div>
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<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> literals_.erase(</div>
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<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> std::unique(literals_.begin() + first_literal_index, literals_.end()),</div>
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<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> literals_.end());</div>
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<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> </div>
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<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = first_literal_index + 1; i < literals_.size(); ++i) {</div>
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<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> <a class="code hl_define" href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a>(literals_[i] != literals_[i - 1].Negated());</div>
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<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> }</div>
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<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> clauses_.<a class="code hl_function" href="classabsl_1_1_strong_vector.html#a9263000d449fdccb6cb70b303063e60b">push_back</a>(</div>
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<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> Clause(first_literal_index, literals_.size() - first_literal_index));</div>
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<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> <span class="keywordflow">if</span> (!clause.empty()) {</div>
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<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> num_variables_ =</div>
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<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> <a class="code hl_variable" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::max</a>(num_variables_, literals_.back().Variable().value() + 1);</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> ClauseIndex(clauses_.<a class="code hl_function" href="classabsl_1_1_strong_vector.html#a60304b65bf89363bcc3165d3cde67f86">size</a>() - 1);</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"><a class="line" href="classoperations__research_1_1sat_1_1_drat_checker.html#a18349231154d0f5eaee94fe213f347e6"> 125</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_drat_checker.html#a18349231154d0f5eaee94fe213f347e6">DratChecker::DeleteClause</a>(absl::Span<const Literal> clause) {</div>
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<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span> <span class="comment">// Temporarily add 'clause' to find if it has been previously added.</span></div>
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<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> <span class="keyword">const</span> <span class="keyword">auto</span> it = clause_set_.find(AddClause(clause));</div>
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<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span> <span class="keywordflow">if</span> (it != clause_set_.end()) {</div>
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<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> Clause& existing_clause = clauses_[*it];</div>
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<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span> existing_clause.num_copies -= 1;</div>
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<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span> <span class="keywordflow">if</span> (existing_clause.num_copies == 0) {</div>
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<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(existing_clause.deleted_index == <a class="code hl_variable" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::numeric_limits<int>::max</a>());</div>
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<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span> existing_clause.deleted_index = clauses_.<a class="code hl_function" href="classabsl_1_1_strong_vector.html#a60304b65bf89363bcc3165d3cde67f86">size</a>() - 1;</div>
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<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> <span class="keywordflow">if</span> (clauses_.<a class="code hl_function" href="classabsl_1_1_strong_vector.html#af71e6c1eccbc12e9339c00a86a981a43">back</a>().num_literals >= 2) {</div>
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<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> clauses_[ClauseIndex(clauses_.<a class="code hl_function" href="classabsl_1_1_strong_vector.html#a60304b65bf89363bcc3165d3cde67f86">size</a>() - 2)].deleted_clauses.<a class="code hl_function" href="classabsl_1_1_strong_vector.html#a9263000d449fdccb6cb70b303063e60b">push_back</a>(</div>
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<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> *it);</div>
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<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> }</div>
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<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span> clause_set_.erase(it);</div>
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<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span> }</div>
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<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span> } <span class="keywordflow">else</span> {</div>
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<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span> <a class="code hl_define" href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a>(<a class="code hl_variable" href="log__severity_8h.html#a50e5762f38854b37ee3e2851bc1bb0e7">WARNING</a>) << <span class="stringliteral">"Couldn't find deleted clause"</span>;</div>
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<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span> }</div>
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<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span> <span class="comment">// Delete 'clause' and its literals.</span></div>
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<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> RemoveLastClause();</div>
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<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span>}</div>
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<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span> </div>
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<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span><span class="keywordtype">void</span> DratChecker::RemoveLastClause() {</div>
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<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span> literals_.resize(clauses_.<a class="code hl_function" href="classabsl_1_1_strong_vector.html#af71e6c1eccbc12e9339c00a86a981a43">back</a>().first_literal_index);</div>
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<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span> clauses_.<a class="code hl_function" href="classabsl_1_1_strong_vector.html#a058bda4957df6a97b1ea6c9fd783f672">pop_back</a>();</div>
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<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span>}</div>
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<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span> </div>
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<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span><span class="comment">// See Algorithm of Fig. 8 in 'Trimming while Checking Clausal Proofs'.</span></div>
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<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_drat_checker.html#a29037e50da43e6bda147d22c452fb91d"> 153</a></span><a class="code hl_enumeration" href="classoperations__research_1_1sat_1_1_drat_checker.html#a67a0db04d321a74b7e7fcfd3f1a3f70b">DratChecker::Status</a> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_drat_checker.html#a29037e50da43e6bda147d22c452fb91d">DratChecker::Check</a>(<span class="keywordtype">double</span> max_time_in_seconds) {</div>
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<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span> <span class="comment">// First check that the last infered clause is empty (this implies there</span></div>
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<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span> <span class="comment">// should be at least one infered clause), and mark it as needed for the</span></div>
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<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span> <span class="comment">// proof.</span></div>
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<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span> <span class="keywordflow">if</span> (clauses_.<a class="code hl_function" href="classabsl_1_1_strong_vector.html#a644718bb2fb240de962dc3c9a1fdf0dc">empty</a>() || first_infered_clause_index_ == <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#affcb42181de5b23ba7b5df37fe1676a3">kNoClauseIndex</a> ||</div>
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<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span> clauses_.<a class="code hl_function" href="classabsl_1_1_strong_vector.html#af71e6c1eccbc12e9339c00a86a981a43">back</a>().num_literals != 0) {</div>
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<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"> 159</span> <span class="keywordflow">return</span> Status::INVALID;</div>
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<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span> }</div>
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<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span> clauses_.<a class="code hl_function" href="classabsl_1_1_strong_vector.html#af71e6c1eccbc12e9339c00a86a981a43">back</a>().is_needed_for_proof = <span class="keyword">true</span>;</div>
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<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span> </div>
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<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span> <span class="comment">// Checks the infered clauses in reversed order. The advantage of this order</span></div>
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<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span> <span class="comment">// is that when checking a clause, one can mark all the clauses that are used</span></div>
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<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"> 165</span> <span class="comment">// to check it. In turn, only these marked clauses need to be checked (and so</span></div>
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<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"> 166</span> <span class="comment">// on recursively). By contrast, a forward iteration needs to check all the</span></div>
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<div class="line"><a id="l00167" name="l00167"></a><span class="lineno"> 167</span> <span class="comment">// clauses.</span></div>
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<div class="line"><a id="l00168" name="l00168"></a><span class="lineno"> 168</span> <span class="keyword">const</span> int64_t start_time_nanos = absl::GetCurrentTimeNanos();</div>
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<div class="line"><a id="l00169" name="l00169"></a><span class="lineno"> 169</span> <a class="code hl_class" href="classoperations__research_1_1_time_limit.html">TimeLimit</a> <a class="code hl_variable" href="cp__model__solver_8cc.html#aec8af5c1be4e1b6d4330e1161028de21">time_limit</a>(max_time_in_seconds);</div>
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<div class="line"><a id="l00170" name="l00170"></a><span class="lineno"> 170</span> Init();</div>
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<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span> <span class="keywordflow">for</span> (ClauseIndex i(clauses_.<a class="code hl_function" href="classabsl_1_1_strong_vector.html#a60304b65bf89363bcc3165d3cde67f86">size</a>() - 1); i >= first_infered_clause_index_;</div>
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<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span> --i) {</div>
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<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span> <span class="keywordflow">if</span> (<a class="code hl_variable" href="cp__model__solver_8cc.html#aec8af5c1be4e1b6d4330e1161028de21">time_limit</a>.LimitReached()) {</div>
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<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span> <span class="keywordflow">return</span> Status::UNKNOWN;</div>
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<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span> }</div>
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<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span> <span class="keyword">const</span> Clause& clause = clauses_[i];</div>
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<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span> <span class="comment">// Start watching the literals of the clauses that were deleted just after</span></div>
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<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span> <span class="comment">// this one, and which are now no longer deleted.</span></div>
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<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> ClauseIndex j : clause.deleted_clauses) {</div>
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<div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span> WatchClause(j);</div>
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<div class="line"><a id="l00181" name="l00181"></a><span class="lineno"> 181</span> }</div>
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<div class="line"><a id="l00182" name="l00182"></a><span class="lineno"> 182</span> <span class="keywordflow">if</span> (!clause.is_needed_for_proof) {</div>
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<div class="line"><a id="l00183" name="l00183"></a><span class="lineno"> 183</span> <span class="keywordflow">continue</span>;</div>
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<div class="line"><a id="l00184" name="l00184"></a><span class="lineno"> 184</span> }</div>
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<div class="line"><a id="l00185" name="l00185"></a><span class="lineno"> 185</span> <span class="comment">// 'clause' must have either the Reverse Unit Propagation (RUP) property:</span></div>
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<div class="line"><a id="l00186" name="l00186"></a><span class="lineno"> 186</span> <span class="keywordflow">if</span> (HasRupProperty(i, Literals(clause))) {</div>
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<div class="line"><a id="l00187" name="l00187"></a><span class="lineno"> 187</span> <span class="keywordflow">continue</span>;</div>
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<div class="line"><a id="l00188" name="l00188"></a><span class="lineno"> 188</span> }</div>
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<div class="line"><a id="l00189" name="l00189"></a><span class="lineno"> 189</span> <span class="comment">// or the Reverse Asymetric Tautology (RAT) property. This property is</span></div>
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<div class="line"><a id="l00190" name="l00190"></a><span class="lineno"> 190</span> <span class="comment">// defined by the fact that all clauses which contain the negation of</span></div>
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<div class="line"><a id="l00191" name="l00191"></a><span class="lineno"> 191</span> <span class="comment">// the RAT literal of 'clause', after resolution with 'clause', must have</span></div>
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<div class="line"><a id="l00192" name="l00192"></a><span class="lineno"> 192</span> <span class="comment">// the RUP property.</span></div>
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<div class="line"><a id="l00193" name="l00193"></a><span class="lineno"> 193</span> <span class="comment">// Note from 'DRAT-trim: Efficient Checking and Trimming Using Expressive</span></div>
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<div class="line"><a id="l00194" name="l00194"></a><span class="lineno"> 194</span> <span class="comment">// Clausal Proofs': "[in order] to access to all clauses containing the</span></div>
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<div class="line"><a id="l00195" name="l00195"></a><span class="lineno"> 195</span> <span class="comment">// negation of the resolution literal, one could build a literal-to-clause</span></div>
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<div class="line"><a id="l00196" name="l00196"></a><span class="lineno"> 196</span> <span class="comment">// lookup table of the original formula and update it after each lemma</span></div>
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<div class="line"><a id="l00197" name="l00197"></a><span class="lineno"> 197</span> <span class="comment">// addition and deletion step. However, these updates can be expensive and</span></div>
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<div class="line"><a id="l00198" name="l00198"></a><span class="lineno"> 198</span> <span class="comment">// the lookup table potentially doubles the memory usage of the tool.</span></div>
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<div class="line"><a id="l00199" name="l00199"></a><span class="lineno"> 199</span> <span class="comment">// Since most lemmas emitted by state-of-the-art SAT solvers can be</span></div>
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<div class="line"><a id="l00200" name="l00200"></a><span class="lineno"> 200</span> <span class="comment">// validated using the RUP check, such a lookup table has been omitted."</span></div>
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<div class="line"><a id="l00201" name="l00201"></a><span class="lineno"> 201</span> <span class="keywordflow">if</span> (clause.rat_literal_index == <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#a2dbcb7017d468a17bdb30252af5c6c31">kNoLiteralIndex</a>) <span class="keywordflow">return</span> Status::INVALID;</div>
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<div class="line"><a id="l00202" name="l00202"></a><span class="lineno"> 202</span> ++num_rat_checks_;</div>
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<div class="line"><a id="l00203" name="l00203"></a><span class="lineno"> 203</span> std::vector<Literal> resolvent;</div>
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<div class="line"><a id="l00204" name="l00204"></a><span class="lineno"> 204</span> <span class="keywordflow">for</span> (ClauseIndex j(0); j < i; ++j) {</div>
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<div class="line"><a id="l00205" name="l00205"></a><span class="lineno"> 205</span> <span class="keywordflow">if</span> (!clauses_[j].IsDeleted(i) &&</div>
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<div class="line"><a id="l00206" name="l00206"></a><span class="lineno"> 206</span> <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#add4d19635eabde70c0aa36e1a6847df7">ContainsLiteral</a>(Literals(clauses_[j]),</div>
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<div class="line"><a id="l00207" name="l00207"></a><span class="lineno"> 207</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a>(clause.rat_literal_index).<a class="code hl_function" href="classoperations__research_1_1sat_1_1_literal.html#a886e9c024f7209181c0a850b6e90c644">Negated</a>())) {</div>
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<div class="line"><a id="l00208" name="l00208"></a><span class="lineno"> 208</span> <span class="comment">// Check that the resolvent has the RUP property.</span></div>
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<div class="line"><a id="l00209" name="l00209"></a><span class="lineno"> 209</span> <span class="keywordflow">if</span> (!<a class="code hl_function" href="namespaceoperations__research_1_1sat.html#a5a48aae9891af96b29504592d319cba6">Resolve</a>(Literals(clause), Literals(clauses_[j]),</div>
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<div class="line"><a id="l00210" name="l00210"></a><span class="lineno"> 210</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a>(clause.rat_literal_index), &tmp_assignment_,</div>
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<div class="line"><a id="l00211" name="l00211"></a><span class="lineno"> 211</span> &resolvent) ||</div>
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<div class="line"><a id="l00212" name="l00212"></a><span class="lineno"> 212</span> !HasRupProperty(i, resolvent)) {</div>
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<div class="line"><a id="l00213" name="l00213"></a><span class="lineno"> 213</span> <span class="keywordflow">return</span> Status::INVALID;</div>
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<div class="line"><a id="l00214" name="l00214"></a><span class="lineno"> 214</span> }</div>
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<div class="line"><a id="l00215" name="l00215"></a><span class="lineno"> 215</span> }</div>
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<div class="line"><a id="l00216" name="l00216"></a><span class="lineno"> 216</span> }</div>
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<div class="line"><a id="l00217" name="l00217"></a><span class="lineno"> 217</span> }</div>
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<div class="line"><a id="l00218" name="l00218"></a><span class="lineno"> 218</span> LogStatistics(absl::GetCurrentTimeNanos() - start_time_nanos);</div>
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<div class="line"><a id="l00219" name="l00219"></a><span class="lineno"> 219</span> <span class="keywordflow">return</span> Status::VALID;</div>
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<div class="line"><a id="l00220" name="l00220"></a><span class="lineno"> 220</span>}</div>
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<div class="line"><a id="l00221" name="l00221"></a><span class="lineno"> 221</span> </div>
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<div class="line"><a id="l00222" name="l00222"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_drat_checker.html#a3ad1c6b4aef6d5028b7748c2c9330912"> 222</a></span>std::vector<std::vector<Literal>> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_drat_checker.html#a3ad1c6b4aef6d5028b7748c2c9330912">DratChecker::GetUnsatSubProblem</a>()<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00223" name="l00223"></a><span class="lineno"> 223</span> <span class="keywordflow">return</span> GetClausesNeededForProof(ClauseIndex(0), first_infered_clause_index_);</div>
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<div class="line"><a id="l00224" name="l00224"></a><span class="lineno"> 224</span>}</div>
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<div class="line"><a id="l00225" name="l00225"></a><span class="lineno"> 225</span> </div>
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<div class="line"><a id="l00226" name="l00226"></a><span class="lineno"><a class="line" href="classoperations__research_1_1sat_1_1_drat_checker.html#a8e3d09e79f9855a586254f5d74b11720"> 226</a></span>std::vector<std::vector<Literal>> <a class="code hl_function" href="classoperations__research_1_1sat_1_1_drat_checker.html#a8e3d09e79f9855a586254f5d74b11720">DratChecker::GetOptimizedProof</a>()<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00227" name="l00227"></a><span class="lineno"> 227</span> <span class="keywordflow">return</span> GetClausesNeededForProof(first_infered_clause_index_,</div>
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<div class="line"><a id="l00228" name="l00228"></a><span class="lineno"> 228</span> ClauseIndex(clauses_.<a class="code hl_function" href="classabsl_1_1_strong_vector.html#a60304b65bf89363bcc3165d3cde67f86">size</a>()));</div>
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<div class="line"><a id="l00229" name="l00229"></a><span class="lineno"> 229</span>}</div>
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<div class="line"><a id="l00230" name="l00230"></a><span class="lineno"> 230</span> </div>
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<div class="line"><a id="l00231" name="l00231"></a><span class="lineno"> 231</span>std::vector<std::vector<Literal>> DratChecker::GetClausesNeededForProof(</div>
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<div class="line"><a id="l00232" name="l00232"></a><span class="lineno"> 232</span> ClauseIndex begin, ClauseIndex <a class="code hl_variable" href="sparse__submatrix_8cc.html#a4d53eac2ef2732c28fa9fb663e0c19a7">end</a>)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00233" name="l00233"></a><span class="lineno"> 233</span> std::vector<std::vector<Literal>> result;</div>
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<div class="line"><a id="l00234" name="l00234"></a><span class="lineno"> 234</span> <span class="keywordflow">for</span> (ClauseIndex i = begin; i < <a class="code hl_variable" href="sparse__submatrix_8cc.html#a4d53eac2ef2732c28fa9fb663e0c19a7">end</a>; ++i) {</div>
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<div class="line"><a id="l00235" name="l00235"></a><span class="lineno"> 235</span> <span class="keyword">const</span> Clause& clause = clauses_[i];</div>
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<div class="line"><a id="l00236" name="l00236"></a><span class="lineno"> 236</span> <span class="keywordflow">if</span> (clause.is_needed_for_proof) {</div>
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<div class="line"><a id="l00237" name="l00237"></a><span class="lineno"> 237</span> <span class="keyword">const</span> absl::Span<const Literal>& literals = Literals(clause);</div>
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<div class="line"><a id="l00238" name="l00238"></a><span class="lineno"> 238</span> result.emplace_back(literals.begin(), literals.end());</div>
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<div class="line"><a id="l00239" name="l00239"></a><span class="lineno"> 239</span> <span class="keywordflow">if</span> (clause.rat_literal_index != <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#a2dbcb7017d468a17bdb30252af5c6c31">kNoLiteralIndex</a>) {</div>
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<div class="line"><a id="l00240" name="l00240"></a><span class="lineno"> 240</span> <span class="keyword">const</span> <span class="keywordtype">int</span> rat_literal_clause_index =</div>
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<div class="line"><a id="l00241" name="l00241"></a><span class="lineno"> 241</span> std::find(literals.begin(), literals.end(),</div>
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<div class="line"><a id="l00242" name="l00242"></a><span class="lineno"> 242</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a>(clause.rat_literal_index)) -</div>
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<div class="line"><a id="l00243" name="l00243"></a><span class="lineno"> 243</span> literals.begin();</div>
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<div class="line"><a id="l00244" name="l00244"></a><span class="lineno"> 244</span> <a class="code hl_function" href="namespaceoperations__research_1_1math__opt.html#a5de89a1f6e3f80a49a0d76136d8044e2">std::swap</a>(result.back()[0], result.back()[rat_literal_clause_index]);</div>
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<div class="line"><a id="l00245" name="l00245"></a><span class="lineno"> 245</span> }</div>
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<div class="line"><a id="l00246" name="l00246"></a><span class="lineno"> 246</span> }</div>
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<div class="line"><a id="l00247" name="l00247"></a><span class="lineno"> 247</span> }</div>
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<div class="line"><a id="l00248" name="l00248"></a><span class="lineno"> 248</span> <span class="keywordflow">return</span> result;</div>
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<div class="line"><a id="l00249" name="l00249"></a><span class="lineno"> 249</span>}</div>
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<div class="line"><a id="l00250" name="l00250"></a><span class="lineno"> 250</span> </div>
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<div class="line"><a id="l00251" name="l00251"></a><span class="lineno"> 251</span>absl::Span<const Literal> DratChecker::Literals(<span class="keyword">const</span> Clause& clause)<span class="keyword"> const </span>{</div>
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<div class="line"><a id="l00252" name="l00252"></a><span class="lineno"> 252</span> <span class="keywordflow">return</span> absl::Span<const Literal>(</div>
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<div class="line"><a id="l00253" name="l00253"></a><span class="lineno"> 253</span> literals_.data() + clause.first_literal_index, clause.num_literals);</div>
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<div class="line"><a id="l00254" name="l00254"></a><span class="lineno"> 254</span>}</div>
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<div class="line"><a id="l00255" name="l00255"></a><span class="lineno"> 255</span> </div>
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<div class="line"><a id="l00256" name="l00256"></a><span class="lineno"> 256</span><span class="keywordtype">void</span> DratChecker::Init() {</div>
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<div class="line"><a id="l00257" name="l00257"></a><span class="lineno"> 257</span> assigned_.clear();</div>
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<div class="line"><a id="l00258" name="l00258"></a><span class="lineno"> 258</span> assignment_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_variables_assignment.html#af7fbbd00f0e631ce361b5ce6636b2017">Resize</a>(num_variables_);</div>
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<div class="line"><a id="l00259" name="l00259"></a><span class="lineno"> 259</span> assignment_source_.<a class="code hl_function" href="classabsl_1_1_strong_vector.html#a4e3670a285a3642eaa07f66766cffa72">resize</a>(num_variables_, <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#affcb42181de5b23ba7b5df37fe1676a3">kNoClauseIndex</a>);</div>
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<div class="line"><a id="l00260" name="l00260"></a><span class="lineno"> 260</span> high_priority_literals_to_assign_.clear();</div>
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<div class="line"><a id="l00261" name="l00261"></a><span class="lineno"> 261</span> low_priority_literals_to_assign_.clear();</div>
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<div class="line"><a id="l00262" name="l00262"></a><span class="lineno"> 262</span> watched_literals_.<a class="code hl_function" href="classabsl_1_1_strong_vector.html#ac8bb3912a3ce86b15842e79d0b421204">clear</a>();</div>
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<div class="line"><a id="l00263" name="l00263"></a><span class="lineno"> 263</span> watched_literals_.<a class="code hl_function" href="classabsl_1_1_strong_vector.html#a4e3670a285a3642eaa07f66766cffa72">resize</a>(2 * num_variables_);</div>
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<div class="line"><a id="l00264" name="l00264"></a><span class="lineno"> 264</span> single_literal_clauses_.clear();</div>
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<div class="line"><a id="l00265" name="l00265"></a><span class="lineno"> 265</span> unit_stack_.clear();</div>
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<div class="line"><a id="l00266" name="l00266"></a><span class="lineno"> 266</span> tmp_assignment_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_variables_assignment.html#af7fbbd00f0e631ce361b5ce6636b2017">Resize</a>(num_variables_);</div>
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<div class="line"><a id="l00267" name="l00267"></a><span class="lineno"> 267</span> num_rat_checks_ = 0;</div>
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<div class="line"><a id="l00268" name="l00268"></a><span class="lineno"> 268</span> </div>
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<div class="line"><a id="l00269" name="l00269"></a><span class="lineno"> 269</span> <span class="keywordflow">for</span> (ClauseIndex clause_index(0); clause_index < clauses_.<a class="code hl_function" href="classabsl_1_1_strong_vector.html#a60304b65bf89363bcc3165d3cde67f86">size</a>();</div>
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<div class="line"><a id="l00270" name="l00270"></a><span class="lineno"> 270</span> ++clause_index) {</div>
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<div class="line"><a id="l00271" name="l00271"></a><span class="lineno"> 271</span> Clause& clause = clauses_[clause_index];</div>
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<div class="line"><a id="l00272" name="l00272"></a><span class="lineno"> 272</span> <span class="keywordflow">if</span> (clause.num_literals >= 2) {</div>
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<div class="line"><a id="l00273" name="l00273"></a><span class="lineno"> 273</span> <span class="comment">// Don't watch the literals of the deleted clauses right away, instead</span></div>
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<div class="line"><a id="l00274" name="l00274"></a><span class="lineno"> 274</span> <span class="comment">// watch them when these clauses become 'undeleted' in backward checking.</span></div>
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<div class="line"><a id="l00275" name="l00275"></a><span class="lineno"> 275</span> <span class="keywordflow">if</span> (clause.deleted_index == <a class="code hl_variable" href="alldiff__cst_8cc.html#a26e6db9bcc64b584051ecc28171ed11f">std::numeric_limits<int>::max</a>()) {</div>
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<div class="line"><a id="l00276" name="l00276"></a><span class="lineno"> 276</span> WatchClause(clause_index);</div>
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<div class="line"><a id="l00277" name="l00277"></a><span class="lineno"> 277</span> }</div>
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<div class="line"><a id="l00278" name="l00278"></a><span class="lineno"> 278</span> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (clause.num_literals == 1) {</div>
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<div class="line"><a id="l00279" name="l00279"></a><span class="lineno"> 279</span> single_literal_clauses_.push_back(clause_index);</div>
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<div class="line"><a id="l00280" name="l00280"></a><span class="lineno"> 280</span> }</div>
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<div class="line"><a id="l00281" name="l00281"></a><span class="lineno"> 281</span> }</div>
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<div class="line"><a id="l00282" name="l00282"></a><span class="lineno"> 282</span>}</div>
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<div class="line"><a id="l00283" name="l00283"></a><span class="lineno"> 283</span> </div>
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<div class="line"><a id="l00284" name="l00284"></a><span class="lineno"> 284</span><span class="keywordtype">void</span> DratChecker::WatchClause(ClauseIndex clause_index) {</div>
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<div class="line"><a id="l00285" name="l00285"></a><span class="lineno"> 285</span> <span class="keyword">const</span> Literal* clause_literals =</div>
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<div class="line"><a id="l00286" name="l00286"></a><span class="lineno"> 286</span> literals_.data() + clauses_[clause_index].first_literal_index;</div>
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<div class="line"><a id="l00287" name="l00287"></a><span class="lineno"> 287</span> watched_literals_[clause_literals[0].Index()].<a class="code hl_function" href="classabsl_1_1_strong_vector.html#a9263000d449fdccb6cb70b303063e60b">push_back</a>(clause_index);</div>
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<div class="line"><a id="l00288" name="l00288"></a><span class="lineno"> 288</span> watched_literals_[clause_literals[1].Index()].<a class="code hl_function" href="classabsl_1_1_strong_vector.html#a9263000d449fdccb6cb70b303063e60b">push_back</a>(clause_index);</div>
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<div class="line"><a id="l00289" name="l00289"></a><span class="lineno"> 289</span>}</div>
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<div class="line"><a id="l00290" name="l00290"></a><span class="lineno"> 290</span> </div>
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<div class="line"><a id="l00291" name="l00291"></a><span class="lineno"> 291</span><span class="keywordtype">bool</span> DratChecker::HasRupProperty(ClauseIndex num_clauses,</div>
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<div class="line"><a id="l00292" name="l00292"></a><span class="lineno"> 292</span> absl::Span<const Literal> clause) {</div>
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<div class="line"><a id="l00293" name="l00293"></a><span class="lineno"> 293</span> ClauseIndex conflict = <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#affcb42181de5b23ba7b5df37fe1676a3">kNoClauseIndex</a>;</div>
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<div class="line"><a id="l00294" name="l00294"></a><span class="lineno"> 294</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> Literal <a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : clause) {</div>
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<div class="line"><a id="l00295" name="l00295"></a><span class="lineno"> 295</span> conflict =</div>
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<div class="line"><a id="l00296" name="l00296"></a><span class="lineno"> 296</span> AssignAndPropagate(num_clauses, <a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>.Negated(), <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#affcb42181de5b23ba7b5df37fe1676a3">kNoClauseIndex</a>);</div>
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<div class="line"><a id="l00297" name="l00297"></a><span class="lineno"> 297</span> <span class="keywordflow">if</span> (conflict != <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#affcb42181de5b23ba7b5df37fe1676a3">kNoClauseIndex</a>) {</div>
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<div class="line"><a id="l00298" name="l00298"></a><span class="lineno"> 298</span> <span class="keywordflow">break</span>;</div>
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<div class="line"><a id="l00299" name="l00299"></a><span class="lineno"> 299</span> }</div>
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<div class="line"><a id="l00300" name="l00300"></a><span class="lineno"> 300</span> }</div>
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<div class="line"><a id="l00301" name="l00301"></a><span class="lineno"> 301</span> </div>
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<div class="line"><a id="l00302" name="l00302"></a><span class="lineno"> 302</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> ClauseIndex clause_index : single_literal_clauses_) {</div>
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<div class="line"><a id="l00303" name="l00303"></a><span class="lineno"> 303</span> <span class="keyword">const</span> Clause& clause = clauses_[clause_index];</div>
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<div class="line"><a id="l00304" name="l00304"></a><span class="lineno"> 304</span> <span class="comment">// TODO(user): consider ignoring the deletion of single literal clauses</span></div>
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<div class="line"><a id="l00305" name="l00305"></a><span class="lineno"> 305</span> <span class="comment">// as done in drat-trim.</span></div>
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<div class="line"><a id="l00306" name="l00306"></a><span class="lineno"> 306</span> <span class="keywordflow">if</span> (clause_index < num_clauses && !clause.IsDeleted(num_clauses)) {</div>
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<div class="line"><a id="l00307" name="l00307"></a><span class="lineno"> 307</span> <span class="keywordflow">if</span> (clause.is_needed_for_proof) {</div>
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<div class="line"><a id="l00308" name="l00308"></a><span class="lineno"> 308</span> high_priority_literals_to_assign_.push_back(</div>
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<div class="line"><a id="l00309" name="l00309"></a><span class="lineno"> 309</span> {literals_[clause.first_literal_index], clause_index});</div>
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<div class="line"><a id="l00310" name="l00310"></a><span class="lineno"> 310</span> } <span class="keywordflow">else</span> {</div>
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<div class="line"><a id="l00311" name="l00311"></a><span class="lineno"> 311</span> low_priority_literals_to_assign_.push_back(</div>
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<div class="line"><a id="l00312" name="l00312"></a><span class="lineno"> 312</span> {literals_[clause.first_literal_index], clause_index});</div>
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<div class="line"><a id="l00313" name="l00313"></a><span class="lineno"> 313</span> }</div>
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<div class="line"><a id="l00314" name="l00314"></a><span class="lineno"> 314</span> }</div>
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<div class="line"><a id="l00315" name="l00315"></a><span class="lineno"> 315</span> }</div>
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<div class="line"><a id="l00316" name="l00316"></a><span class="lineno"> 316</span> </div>
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<div class="line"><a id="l00317" name="l00317"></a><span class="lineno"> 317</span> <span class="keywordflow">while</span> (!(high_priority_literals_to_assign_.empty() &&</div>
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<div class="line"><a id="l00318" name="l00318"></a><span class="lineno"> 318</span> low_priority_literals_to_assign_.empty()) &&</div>
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<div class="line"><a id="l00319" name="l00319"></a><span class="lineno"> 319</span> conflict == <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#affcb42181de5b23ba7b5df37fe1676a3">kNoClauseIndex</a>) {</div>
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<div class="line"><a id="l00320" name="l00320"></a><span class="lineno"> 320</span> std::vector<LiteralToAssign>& stack =</div>
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<div class="line"><a id="l00321" name="l00321"></a><span class="lineno"> 321</span> high_priority_literals_to_assign_.empty()</div>
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<div class="line"><a id="l00322" name="l00322"></a><span class="lineno"> 322</span> ? low_priority_literals_to_assign_</div>
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<div class="line"><a id="l00323" name="l00323"></a><span class="lineno"> 323</span> : high_priority_literals_to_assign_;</div>
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<div class="line"><a id="l00324" name="l00324"></a><span class="lineno"> 324</span> <span class="keyword">const</span> LiteralToAssign literal_to_assign = stack.back();</div>
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<div class="line"><a id="l00325" name="l00325"></a><span class="lineno"> 325</span> stack.pop_back();</div>
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<div class="line"><a id="l00326" name="l00326"></a><span class="lineno"> 326</span> <span class="keywordflow">if</span> (assignment_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_variables_assignment.html#a142694366986039454f53b38e8378815">LiteralIsAssigned</a>(literal_to_assign.literal)) {</div>
|
|
<div class="line"><a id="l00327" name="l00327"></a><span class="lineno"> 327</span> <span class="comment">// If the literal to assign to true is already assigned to false, we found</span></div>
|
|
<div class="line"><a id="l00328" name="l00328"></a><span class="lineno"> 328</span> <span class="comment">// a conflict, with the source clause of this previous assignment.</span></div>
|
|
<div class="line"><a id="l00329" name="l00329"></a><span class="lineno"> 329</span> <span class="keywordflow">if</span> (assignment_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_variables_assignment.html#acfd1646011e643f58fd7dc66d9cc90a5">LiteralIsFalse</a>(literal_to_assign.literal)) {</div>
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|
<div class="line"><a id="l00330" name="l00330"></a><span class="lineno"> 330</span> conflict = literal_to_assign.source_clause_index;</div>
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|
<div class="line"><a id="l00331" name="l00331"></a><span class="lineno"> 331</span> <span class="keywordflow">break</span>;</div>
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|
<div class="line"><a id="l00332" name="l00332"></a><span class="lineno"> 332</span> } <span class="keywordflow">else</span> {</div>
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|
<div class="line"><a id="l00333" name="l00333"></a><span class="lineno"> 333</span> <span class="keywordflow">continue</span>;</div>
|
|
<div class="line"><a id="l00334" name="l00334"></a><span class="lineno"> 334</span> }</div>
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|
<div class="line"><a id="l00335" name="l00335"></a><span class="lineno"> 335</span> }</div>
|
|
<div class="line"><a id="l00336" name="l00336"></a><span class="lineno"> 336</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(literal_to_assign.source_clause_index != <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#affcb42181de5b23ba7b5df37fe1676a3">kNoClauseIndex</a>);</div>
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<div class="line"><a id="l00337" name="l00337"></a><span class="lineno"> 337</span> unit_stack_.push_back(literal_to_assign.source_clause_index);</div>
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<div class="line"><a id="l00338" name="l00338"></a><span class="lineno"> 338</span> conflict = AssignAndPropagate(num_clauses, literal_to_assign.literal,</div>
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|
<div class="line"><a id="l00339" name="l00339"></a><span class="lineno"> 339</span> literal_to_assign.source_clause_index);</div>
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<div class="line"><a id="l00340" name="l00340"></a><span class="lineno"> 340</span> }</div>
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<div class="line"><a id="l00341" name="l00341"></a><span class="lineno"> 341</span> <span class="keywordflow">if</span> (conflict != <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#affcb42181de5b23ba7b5df37fe1676a3">kNoClauseIndex</a>) {</div>
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<div class="line"><a id="l00342" name="l00342"></a><span class="lineno"> 342</span> MarkAsNeededForProof(&clauses_[conflict]);</div>
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|
<div class="line"><a id="l00343" name="l00343"></a><span class="lineno"> 343</span> }</div>
|
|
<div class="line"><a id="l00344" name="l00344"></a><span class="lineno"> 344</span> </div>
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<div class="line"><a id="l00345" name="l00345"></a><span class="lineno"> 345</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> Literal <a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : assigned_) {</div>
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|
<div class="line"><a id="l00346" name="l00346"></a><span class="lineno"> 346</span> assignment_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_variables_assignment.html#ac0fcde8be88b802d340601a4a0441b28">UnassignLiteral</a>(<a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>);</div>
|
|
<div class="line"><a id="l00347" name="l00347"></a><span class="lineno"> 347</span> }</div>
|
|
<div class="line"><a id="l00348" name="l00348"></a><span class="lineno"> 348</span> assigned_.clear();</div>
|
|
<div class="line"><a id="l00349" name="l00349"></a><span class="lineno"> 349</span> high_priority_literals_to_assign_.clear();</div>
|
|
<div class="line"><a id="l00350" name="l00350"></a><span class="lineno"> 350</span> low_priority_literals_to_assign_.clear();</div>
|
|
<div class="line"><a id="l00351" name="l00351"></a><span class="lineno"> 351</span> unit_stack_.clear();</div>
|
|
<div class="line"><a id="l00352" name="l00352"></a><span class="lineno"> 352</span> </div>
|
|
<div class="line"><a id="l00353" name="l00353"></a><span class="lineno"> 353</span> <span class="keywordflow">return</span> conflict != <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#affcb42181de5b23ba7b5df37fe1676a3">kNoClauseIndex</a>;</div>
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|
<div class="line"><a id="l00354" name="l00354"></a><span class="lineno"> 354</span>}</div>
|
|
<div class="line"><a id="l00355" name="l00355"></a><span class="lineno"> 355</span> </div>
|
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<div class="line"><a id="l00356" name="l00356"></a><span class="lineno"> 356</span>ClauseIndex DratChecker::AssignAndPropagate(ClauseIndex num_clauses,</div>
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|
<div class="line"><a id="l00357" name="l00357"></a><span class="lineno"> 357</span> Literal <a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>,</div>
|
|
<div class="line"><a id="l00358" name="l00358"></a><span class="lineno"> 358</span> ClauseIndex source_clause_index) {</div>
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<div class="line"><a id="l00359" name="l00359"></a><span class="lineno"> 359</span> assigned_.push_back(<a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>);</div>
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|
<div class="line"><a id="l00360" name="l00360"></a><span class="lineno"> 360</span> assignment_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_variables_assignment.html#a945bb6c1e83f281fdde5778473a12b37">AssignFromTrueLiteral</a>(<a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>);</div>
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|
<div class="line"><a id="l00361" name="l00361"></a><span class="lineno"> 361</span> assignment_source_[<a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>.Variable()] = source_clause_index;</div>
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|
<div class="line"><a id="l00362" name="l00362"></a><span class="lineno"> 362</span> </div>
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<div class="line"><a id="l00363" name="l00363"></a><span class="lineno"> 363</span> <span class="keyword">const</span> Literal false_literal = <a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>.Negated();</div>
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|
<div class="line"><a id="l00364" name="l00364"></a><span class="lineno"> 364</span> std::vector<ClauseIndex>& watched = watched_literals_[false_literal.Index()];</div>
|
|
<div class="line"><a id="l00365" name="l00365"></a><span class="lineno"> 365</span> <span class="keywordtype">int</span> new_watched_size = 0;</div>
|
|
<div class="line"><a id="l00366" name="l00366"></a><span class="lineno"> 366</span> ClauseIndex conflict_index = <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#affcb42181de5b23ba7b5df37fe1676a3">kNoClauseIndex</a>;</div>
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<div class="line"><a id="l00367" name="l00367"></a><span class="lineno"> 367</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> ClauseIndex clause_index : watched) {</div>
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|
<div class="line"><a id="l00368" name="l00368"></a><span class="lineno"> 368</span> <span class="keywordflow">if</span> (clause_index >= num_clauses) {</div>
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|
<div class="line"><a id="l00369" name="l00369"></a><span class="lineno"> 369</span> <span class="comment">// Stop watching the literals of clauses which cannot possibly be</span></div>
|
|
<div class="line"><a id="l00370" name="l00370"></a><span class="lineno"> 370</span> <span class="comment">// necessary to check the rest of the proof.</span></div>
|
|
<div class="line"><a id="l00371" name="l00371"></a><span class="lineno"> 371</span> <span class="keywordflow">continue</span>;</div>
|
|
<div class="line"><a id="l00372" name="l00372"></a><span class="lineno"> 372</span> }</div>
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|
<div class="line"><a id="l00373" name="l00373"></a><span class="lineno"> 373</span> Clause& clause = clauses_[clause_index];</div>
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|
<div class="line"><a id="l00374" name="l00374"></a><span class="lineno"> 374</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(!clause.IsDeleted(num_clauses));</div>
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|
<div class="line"><a id="l00375" name="l00375"></a><span class="lineno"> 375</span> <span class="keywordflow">if</span> (conflict_index != <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#affcb42181de5b23ba7b5df37fe1676a3">kNoClauseIndex</a>) {</div>
|
|
<div class="line"><a id="l00376" name="l00376"></a><span class="lineno"> 376</span> watched[new_watched_size++] = clause_index;</div>
|
|
<div class="line"><a id="l00377" name="l00377"></a><span class="lineno"> 377</span> <span class="keywordflow">continue</span>;</div>
|
|
<div class="line"><a id="l00378" name="l00378"></a><span class="lineno"> 378</span> }</div>
|
|
<div class="line"><a id="l00379" name="l00379"></a><span class="lineno"> 379</span> </div>
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|
<div class="line"><a id="l00380" name="l00380"></a><span class="lineno"> 380</span> Literal* clause_literals = literals_.data() + clause.first_literal_index;</div>
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|
<div class="line"><a id="l00381" name="l00381"></a><span class="lineno"> 381</span> <span class="keyword">const</span> Literal other_watched_literal(LiteralIndex(</div>
|
|
<div class="line"><a id="l00382" name="l00382"></a><span class="lineno"> 382</span> clause_literals[0].<a class="code hl_typedef" href="namespaceoperations__research_1_1glop.html#ac89c7b45754e9a6bdabc08bea586fc4e">Index</a>().<a class="code hl_variable" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>() ^</div>
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|
<div class="line"><a id="l00383" name="l00383"></a><span class="lineno"> 383</span> clause_literals[1].<a class="code hl_typedef" href="namespaceoperations__research_1_1glop.html#ac89c7b45754e9a6bdabc08bea586fc4e">Index</a>().<a class="code hl_variable" href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a>() ^ false_literal.Index().value()));</div>
|
|
<div class="line"><a id="l00384" name="l00384"></a><span class="lineno"> 384</span> <span class="keywordflow">if</span> (assignment_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_variables_assignment.html#a5300129913f51dcb0b1c531e3248490e">LiteralIsTrue</a>(other_watched_literal)) {</div>
|
|
<div class="line"><a id="l00385" name="l00385"></a><span class="lineno"> 385</span> watched[new_watched_size++] = clause_index;</div>
|
|
<div class="line"><a id="l00386" name="l00386"></a><span class="lineno"> 386</span> <span class="keywordflow">continue</span>;</div>
|
|
<div class="line"><a id="l00387" name="l00387"></a><span class="lineno"> 387</span> }</div>
|
|
<div class="line"><a id="l00388" name="l00388"></a><span class="lineno"> 388</span> </div>
|
|
<div class="line"><a id="l00389" name="l00389"></a><span class="lineno"> 389</span> <span class="keywordtype">bool</span> new_watched_literal_found = <span class="keyword">false</span>;</div>
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|
<div class="line"><a id="l00390" name="l00390"></a><span class="lineno"> 390</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 2; i < clause.num_literals; ++i) {</div>
|
|
<div class="line"><a id="l00391" name="l00391"></a><span class="lineno"> 391</span> <span class="keywordflow">if</span> (!assignment_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_variables_assignment.html#acfd1646011e643f58fd7dc66d9cc90a5">LiteralIsFalse</a>(clause_literals[i])) {</div>
|
|
<div class="line"><a id="l00392" name="l00392"></a><span class="lineno"> 392</span> clause_literals[0] = other_watched_literal;</div>
|
|
<div class="line"><a id="l00393" name="l00393"></a><span class="lineno"> 393</span> clause_literals[1] = clause_literals[i];</div>
|
|
<div class="line"><a id="l00394" name="l00394"></a><span class="lineno"> 394</span> clause_literals[i] = false_literal;</div>
|
|
<div class="line"><a id="l00395" name="l00395"></a><span class="lineno"> 395</span> watched_literals_[clause_literals[1].Index()].<a class="code hl_function" href="classabsl_1_1_strong_vector.html#a9263000d449fdccb6cb70b303063e60b">push_back</a>(clause_index);</div>
|
|
<div class="line"><a id="l00396" name="l00396"></a><span class="lineno"> 396</span> new_watched_literal_found = <span class="keyword">true</span>;</div>
|
|
<div class="line"><a id="l00397" name="l00397"></a><span class="lineno"> 397</span> <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a id="l00398" name="l00398"></a><span class="lineno"> 398</span> }</div>
|
|
<div class="line"><a id="l00399" name="l00399"></a><span class="lineno"> 399</span> }</div>
|
|
<div class="line"><a id="l00400" name="l00400"></a><span class="lineno"> 400</span> </div>
|
|
<div class="line"><a id="l00401" name="l00401"></a><span class="lineno"> 401</span> <span class="keywordflow">if</span> (!new_watched_literal_found) {</div>
|
|
<div class="line"><a id="l00402" name="l00402"></a><span class="lineno"> 402</span> <span class="keywordflow">if</span> (assignment_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_variables_assignment.html#acfd1646011e643f58fd7dc66d9cc90a5">LiteralIsFalse</a>(other_watched_literal)) {</div>
|
|
<div class="line"><a id="l00403" name="l00403"></a><span class="lineno"> 403</span> <span class="comment">// 'clause' is falsified with 'assignment_', we found a conflict.</span></div>
|
|
<div class="line"><a id="l00404" name="l00404"></a><span class="lineno"> 404</span> <span class="comment">// TODO(user): test moving the rest of the vector here and</span></div>
|
|
<div class="line"><a id="l00405" name="l00405"></a><span class="lineno"> 405</span> <span class="comment">// returning right away.</span></div>
|
|
<div class="line"><a id="l00406" name="l00406"></a><span class="lineno"> 406</span> conflict_index = clause_index;</div>
|
|
<div class="line"><a id="l00407" name="l00407"></a><span class="lineno"> 407</span> } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a id="l00408" name="l00408"></a><span class="lineno"> 408</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(!assignment_.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_variables_assignment.html#a142694366986039454f53b38e8378815">LiteralIsAssigned</a>(other_watched_literal));</div>
|
|
<div class="line"><a id="l00409" name="l00409"></a><span class="lineno"> 409</span> <span class="comment">// 'clause' is unit, push its unit literal on</span></div>
|
|
<div class="line"><a id="l00410" name="l00410"></a><span class="lineno"> 410</span> <span class="comment">// 'literals_to_assign_high_priority' or</span></div>
|
|
<div class="line"><a id="l00411" name="l00411"></a><span class="lineno"> 411</span> <span class="comment">// 'literals_to_assign_low_priority' to assign it to true and propagate</span></div>
|
|
<div class="line"><a id="l00412" name="l00412"></a><span class="lineno"> 412</span> <span class="comment">// it in a later call to AssignAndPropagate().</span></div>
|
|
<div class="line"><a id="l00413" name="l00413"></a><span class="lineno"> 413</span> <span class="keywordflow">if</span> (clause.is_needed_for_proof) {</div>
|
|
<div class="line"><a id="l00414" name="l00414"></a><span class="lineno"> 414</span> high_priority_literals_to_assign_.push_back(</div>
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|
<div class="line"><a id="l00415" name="l00415"></a><span class="lineno"> 415</span> {other_watched_literal, clause_index});</div>
|
|
<div class="line"><a id="l00416" name="l00416"></a><span class="lineno"> 416</span> } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a id="l00417" name="l00417"></a><span class="lineno"> 417</span> low_priority_literals_to_assign_.push_back(</div>
|
|
<div class="line"><a id="l00418" name="l00418"></a><span class="lineno"> 418</span> {other_watched_literal, clause_index});</div>
|
|
<div class="line"><a id="l00419" name="l00419"></a><span class="lineno"> 419</span> }</div>
|
|
<div class="line"><a id="l00420" name="l00420"></a><span class="lineno"> 420</span> }</div>
|
|
<div class="line"><a id="l00421" name="l00421"></a><span class="lineno"> 421</span> watched[new_watched_size++] = clause_index;</div>
|
|
<div class="line"><a id="l00422" name="l00422"></a><span class="lineno"> 422</span> }</div>
|
|
<div class="line"><a id="l00423" name="l00423"></a><span class="lineno"> 423</span> }</div>
|
|
<div class="line"><a id="l00424" name="l00424"></a><span class="lineno"> 424</span> watched.resize(new_watched_size);</div>
|
|
<div class="line"><a id="l00425" name="l00425"></a><span class="lineno"> 425</span> <span class="keywordflow">return</span> conflict_index;</div>
|
|
<div class="line"><a id="l00426" name="l00426"></a><span class="lineno"> 426</span>}</div>
|
|
<div class="line"><a id="l00427" name="l00427"></a><span class="lineno"> 427</span> </div>
|
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<div class="line"><a id="l00428" name="l00428"></a><span class="lineno"> 428</span><span class="keywordtype">void</span> DratChecker::MarkAsNeededForProof(Clause* clause) {</div>
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|
<div class="line"><a id="l00429" name="l00429"></a><span class="lineno"> 429</span> <span class="keyword">const</span> <span class="keyword">auto</span> mark_clause_and_sources = [&](Clause* clause) {</div>
|
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<div class="line"><a id="l00430" name="l00430"></a><span class="lineno"> 430</span> clause->is_needed_for_proof = <span class="keyword">true</span>;</div>
|
|
<div class="line"><a id="l00431" name="l00431"></a><span class="lineno"> 431</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> Literal <a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : Literals(*clause)) {</div>
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|
<div class="line"><a id="l00432" name="l00432"></a><span class="lineno"> 432</span> <span class="keyword">const</span> ClauseIndex source_clause_index =</div>
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|
<div class="line"><a id="l00433" name="l00433"></a><span class="lineno"> 433</span> assignment_source_[<a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>.Variable()];</div>
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|
<div class="line"><a id="l00434" name="l00434"></a><span class="lineno"> 434</span> <span class="keywordflow">if</span> (source_clause_index != <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#affcb42181de5b23ba7b5df37fe1676a3">kNoClauseIndex</a>) {</div>
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|
<div class="line"><a id="l00435" name="l00435"></a><span class="lineno"> 435</span> clauses_[source_clause_index].tmp_is_needed_for_proof_step = <span class="keyword">true</span>;</div>
|
|
<div class="line"><a id="l00436" name="l00436"></a><span class="lineno"> 436</span> }</div>
|
|
<div class="line"><a id="l00437" name="l00437"></a><span class="lineno"> 437</span> }</div>
|
|
<div class="line"><a id="l00438" name="l00438"></a><span class="lineno"> 438</span> };</div>
|
|
<div class="line"><a id="l00439" name="l00439"></a><span class="lineno"> 439</span> mark_clause_and_sources(clause);</div>
|
|
<div class="line"><a id="l00440" name="l00440"></a><span class="lineno"> 440</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = unit_stack_.size() - 1; i >= 0; --i) {</div>
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|
<div class="line"><a id="l00441" name="l00441"></a><span class="lineno"> 441</span> Clause& unit_clause = clauses_[unit_stack_[i]];</div>
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<div class="line"><a id="l00442" name="l00442"></a><span class="lineno"> 442</span> <span class="keywordflow">if</span> (unit_clause.tmp_is_needed_for_proof_step) {</div>
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<div class="line"><a id="l00443" name="l00443"></a><span class="lineno"> 443</span> mark_clause_and_sources(&unit_clause);</div>
|
|
<div class="line"><a id="l00444" name="l00444"></a><span class="lineno"> 444</span> <span class="comment">// We can clean this flag here without risking missing clauses needed for</span></div>
|
|
<div class="line"><a id="l00445" name="l00445"></a><span class="lineno"> 445</span> <span class="comment">// the proof, because the clauses needed for a clause C are always lower</span></div>
|
|
<div class="line"><a id="l00446" name="l00446"></a><span class="lineno"> 446</span> <span class="comment">// than C in the stack.</span></div>
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|
<div class="line"><a id="l00447" name="l00447"></a><span class="lineno"> 447</span> unit_clause.tmp_is_needed_for_proof_step = <span class="keyword">false</span>;</div>
|
|
<div class="line"><a id="l00448" name="l00448"></a><span class="lineno"> 448</span> }</div>
|
|
<div class="line"><a id="l00449" name="l00449"></a><span class="lineno"> 449</span> }</div>
|
|
<div class="line"><a id="l00450" name="l00450"></a><span class="lineno"> 450</span>}</div>
|
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<div class="line"><a id="l00451" name="l00451"></a><span class="lineno"> 451</span> </div>
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<div class="line"><a id="l00452" name="l00452"></a><span class="lineno"> 452</span><span class="keywordtype">void</span> DratChecker::LogStatistics(int64_t duration_nanos)<span class="keyword"> const </span>{</div>
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|
<div class="line"><a id="l00453" name="l00453"></a><span class="lineno"> 453</span> <span class="keywordtype">int</span> problem_clauses_needed_for_proof = 0;</div>
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|
<div class="line"><a id="l00454" name="l00454"></a><span class="lineno"> 454</span> <span class="keywordtype">int</span> infered_clauses_needed_for_proof = 0;</div>
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|
<div class="line"><a id="l00455" name="l00455"></a><span class="lineno"> 455</span> <span class="keywordflow">for</span> (ClauseIndex i(0); i < clauses_.<a class="code hl_function" href="classabsl_1_1_strong_vector.html#a60304b65bf89363bcc3165d3cde67f86">size</a>(); ++i) {</div>
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|
<div class="line"><a id="l00456" name="l00456"></a><span class="lineno"> 456</span> <span class="keywordflow">if</span> (clauses_[i].is_needed_for_proof) {</div>
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|
<div class="line"><a id="l00457" name="l00457"></a><span class="lineno"> 457</span> <span class="keywordflow">if</span> (i < first_infered_clause_index_) {</div>
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<div class="line"><a id="l00458" name="l00458"></a><span class="lineno"> 458</span> ++problem_clauses_needed_for_proof;</div>
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|
<div class="line"><a id="l00459" name="l00459"></a><span class="lineno"> 459</span> } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a id="l00460" name="l00460"></a><span class="lineno"> 460</span> ++infered_clauses_needed_for_proof;</div>
|
|
<div class="line"><a id="l00461" name="l00461"></a><span class="lineno"> 461</span> }</div>
|
|
<div class="line"><a id="l00462" name="l00462"></a><span class="lineno"> 462</span> }</div>
|
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<div class="line"><a id="l00463" name="l00463"></a><span class="lineno"> 463</span> }</div>
|
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<div class="line"><a id="l00464" name="l00464"></a><span class="lineno"> 464</span> <a class="code hl_define" href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a>(<a class="code hl_variable" href="log__severity_8h.html#ab4a2cbab234914b320b7fae11b6e8cb9">INFO</a>) << problem_clauses_needed_for_proof</div>
|
|
<div class="line"><a id="l00465" name="l00465"></a><span class="lineno"> 465</span> << <span class="stringliteral">" problem clauses needed for proof, out of "</span></div>
|
|
<div class="line"><a id="l00466" name="l00466"></a><span class="lineno"> 466</span> << first_infered_clause_index_;</div>
|
|
<div class="line"><a id="l00467" name="l00467"></a><span class="lineno"> 467</span> <a class="code hl_define" href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a>(<a class="code hl_variable" href="log__severity_8h.html#ab4a2cbab234914b320b7fae11b6e8cb9">INFO</a>) << infered_clauses_needed_for_proof</div>
|
|
<div class="line"><a id="l00468" name="l00468"></a><span class="lineno"> 468</span> << <span class="stringliteral">" infered clauses needed for proof, out of "</span></div>
|
|
<div class="line"><a id="l00469" name="l00469"></a><span class="lineno"> 469</span> << clauses_.<a class="code hl_function" href="classabsl_1_1_strong_vector.html#a60304b65bf89363bcc3165d3cde67f86">size</a>() - first_infered_clause_index_;</div>
|
|
<div class="line"><a id="l00470" name="l00470"></a><span class="lineno"> 470</span> <a class="code hl_define" href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a>(<a class="code hl_variable" href="log__severity_8h.html#ab4a2cbab234914b320b7fae11b6e8cb9">INFO</a>) << num_rat_checks_ << <span class="stringliteral">" RAT infered clauses"</span>;</div>
|
|
<div class="line"><a id="l00471" name="l00471"></a><span class="lineno"> 471</span> <a class="code hl_define" href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a>(<a class="code hl_variable" href="log__severity_8h.html#ab4a2cbab234914b320b7fae11b6e8cb9">INFO</a>) << <span class="stringliteral">"verification time: "</span> << 1e-9 * duration_nanos << <span class="stringliteral">" s"</span>;</div>
|
|
<div class="line"><a id="l00472" name="l00472"></a><span class="lineno"> 472</span>}</div>
|
|
<div class="line"><a id="l00473" name="l00473"></a><span class="lineno"> 473</span> </div>
|
|
<div class="line"><a id="l00474" name="l00474"></a><span class="lineno"><a class="line" href="namespaceoperations__research_1_1sat.html#add4d19635eabde70c0aa36e1a6847df7"> 474</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#add4d19635eabde70c0aa36e1a6847df7">ContainsLiteral</a>(absl::Span<const Literal> clause, <a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> <a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>) {</div>
|
|
<div class="line"><a id="l00475" name="l00475"></a><span class="lineno"> 475</span> <span class="keywordflow">return</span> std::find(clause.begin(), clause.end(), <a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>) != clause.end();</div>
|
|
<div class="line"><a id="l00476" name="l00476"></a><span class="lineno"> 476</span>}</div>
|
|
<div class="line"><a id="l00477" name="l00477"></a><span class="lineno"> 477</span> </div>
|
|
<div class="line"><a id="l00478" name="l00478"></a><span class="lineno"><a class="line" href="namespaceoperations__research_1_1sat.html#a5a48aae9891af96b29504592d319cba6"> 478</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#a5a48aae9891af96b29504592d319cba6">Resolve</a>(absl::Span<const Literal> clause,</div>
|
|
<div class="line"><a id="l00479" name="l00479"></a><span class="lineno"> 479</span> absl::Span<const Literal> other_clause,</div>
|
|
<div class="line"><a id="l00480" name="l00480"></a><span class="lineno"> 480</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> complementary_literal, <a class="code hl_class" href="classoperations__research_1_1sat_1_1_variables_assignment.html">VariablesAssignment</a>* assignment,</div>
|
|
<div class="line"><a id="l00481" name="l00481"></a><span class="lineno"> 481</span> std::vector<Literal>* resolvent) {</div>
|
|
<div class="line"><a id="l00482" name="l00482"></a><span class="lineno"> 482</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(<a class="code hl_function" href="namespaceoperations__research_1_1sat.html#add4d19635eabde70c0aa36e1a6847df7">ContainsLiteral</a>(clause, complementary_literal));</div>
|
|
<div class="line"><a id="l00483" name="l00483"></a><span class="lineno"> 483</span> <a class="code hl_define" href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a>(<a class="code hl_function" href="namespaceoperations__research_1_1sat.html#add4d19635eabde70c0aa36e1a6847df7">ContainsLiteral</a>(other_clause, complementary_literal.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_literal.html#a886e9c024f7209181c0a850b6e90c644">Negated</a>()));</div>
|
|
<div class="line"><a id="l00484" name="l00484"></a><span class="lineno"> 484</span> resolvent->clear();</div>
|
|
<div class="line"><a id="l00485" name="l00485"></a><span class="lineno"> 485</span> </div>
|
|
<div class="line"><a id="l00486" name="l00486"></a><span class="lineno"> 486</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> <a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : clause) {</div>
|
|
<div class="line"><a id="l00487" name="l00487"></a><span class="lineno"> 487</span> <span class="keywordflow">if</span> (<a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> != complementary_literal) {</div>
|
|
<div class="line"><a id="l00488" name="l00488"></a><span class="lineno"> 488</span> <span class="comment">// Temporary assignment used to do the checks below in linear time.</span></div>
|
|
<div class="line"><a id="l00489" name="l00489"></a><span class="lineno"> 489</span> assignment-><a class="code hl_function" href="classoperations__research_1_1sat_1_1_variables_assignment.html#a945bb6c1e83f281fdde5778473a12b37">AssignFromTrueLiteral</a>(<a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>);</div>
|
|
<div class="line"><a id="l00490" name="l00490"></a><span class="lineno"> 490</span> resolvent->push_back(<a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>);</div>
|
|
<div class="line"><a id="l00491" name="l00491"></a><span class="lineno"> 491</span> }</div>
|
|
<div class="line"><a id="l00492" name="l00492"></a><span class="lineno"> 492</span> }</div>
|
|
<div class="line"><a id="l00493" name="l00493"></a><span class="lineno"> 493</span> </div>
|
|
<div class="line"><a id="l00494" name="l00494"></a><span class="lineno"> 494</span> <span class="keywordtype">bool</span> result = <span class="keyword">true</span>;</div>
|
|
<div class="line"><a id="l00495" name="l00495"></a><span class="lineno"> 495</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> other_literal : other_clause) {</div>
|
|
<div class="line"><a id="l00496" name="l00496"></a><span class="lineno"> 496</span> <span class="keywordflow">if</span> (other_literal != complementary_literal.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_literal.html#a886e9c024f7209181c0a850b6e90c644">Negated</a>()) {</div>
|
|
<div class="line"><a id="l00497" name="l00497"></a><span class="lineno"> 497</span> <span class="keywordflow">if</span> (assignment-><a class="code hl_function" href="classoperations__research_1_1sat_1_1_variables_assignment.html#acfd1646011e643f58fd7dc66d9cc90a5">LiteralIsFalse</a>(other_literal)) {</div>
|
|
<div class="line"><a id="l00498" name="l00498"></a><span class="lineno"> 498</span> result = <span class="keyword">false</span>;</div>
|
|
<div class="line"><a id="l00499" name="l00499"></a><span class="lineno"> 499</span> <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a id="l00500" name="l00500"></a><span class="lineno"> 500</span> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (!assignment-><a class="code hl_function" href="classoperations__research_1_1sat_1_1_variables_assignment.html#a142694366986039454f53b38e8378815">LiteralIsAssigned</a>(other_literal)) {</div>
|
|
<div class="line"><a id="l00501" name="l00501"></a><span class="lineno"> 501</span> resolvent->push_back(other_literal);</div>
|
|
<div class="line"><a id="l00502" name="l00502"></a><span class="lineno"> 502</span> }</div>
|
|
<div class="line"><a id="l00503" name="l00503"></a><span class="lineno"> 503</span> }</div>
|
|
<div class="line"><a id="l00504" name="l00504"></a><span class="lineno"> 504</span> }</div>
|
|
<div class="line"><a id="l00505" name="l00505"></a><span class="lineno"> 505</span> </div>
|
|
<div class="line"><a id="l00506" name="l00506"></a><span class="lineno"> 506</span> <span class="comment">// Revert the temporary assignment done above.</span></div>
|
|
<div class="line"><a id="l00507" name="l00507"></a><span class="lineno"> 507</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> <a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : clause) {</div>
|
|
<div class="line"><a id="l00508" name="l00508"></a><span class="lineno"> 508</span> <span class="keywordflow">if</span> (<a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> != complementary_literal) {</div>
|
|
<div class="line"><a id="l00509" name="l00509"></a><span class="lineno"> 509</span> assignment-><a class="code hl_function" href="classoperations__research_1_1sat_1_1_variables_assignment.html#ac0fcde8be88b802d340601a4a0441b28">UnassignLiteral</a>(<a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>);</div>
|
|
<div class="line"><a id="l00510" name="l00510"></a><span class="lineno"> 510</span> }</div>
|
|
<div class="line"><a id="l00511" name="l00511"></a><span class="lineno"> 511</span> }</div>
|
|
<div class="line"><a id="l00512" name="l00512"></a><span class="lineno"> 512</span> <span class="keywordflow">return</span> result;</div>
|
|
<div class="line"><a id="l00513" name="l00513"></a><span class="lineno"> 513</span>}</div>
|
|
<div class="line"><a id="l00514" name="l00514"></a><span class="lineno"> 514</span> </div>
|
|
<div class="line"><a id="l00515" name="l00515"></a><span class="lineno"><a class="line" href="namespaceoperations__research_1_1sat.html#afbf73f9bc417ac7511fdd2bc4ab27c22"> 515</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#afbf73f9bc417ac7511fdd2bc4ab27c22">AddProblemClauses</a>(<span class="keyword">const</span> std::string& file_path,</div>
|
|
<div class="line"><a id="l00516" name="l00516"></a><span class="lineno"> 516</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_drat_checker.html">DratChecker</a>* drat_checker) {</div>
|
|
<div class="line"><a id="l00517" name="l00517"></a><span class="lineno"> 517</span> <span class="keywordtype">int</span> line_number = 0;</div>
|
|
<div class="line"><a id="l00518" name="l00518"></a><span class="lineno"> 518</span> <span class="keywordtype">int</span> num_variables = 0;</div>
|
|
<div class="line"><a id="l00519" name="l00519"></a><span class="lineno"> 519</span> <span class="keywordtype">int</span> num_clauses = 0;</div>
|
|
<div class="line"><a id="l00520" name="l00520"></a><span class="lineno"> 520</span> std::vector<Literal> literals;</div>
|
|
<div class="line"><a id="l00521" name="l00521"></a><span class="lineno"> 521</span> std::ifstream <a class="code hl_namespace" href="namespacefile.html">file</a>(file_path);</div>
|
|
<div class="line"><a id="l00522" name="l00522"></a><span class="lineno"> 522</span> std::string line;</div>
|
|
<div class="line"><a id="l00523" name="l00523"></a><span class="lineno"> 523</span> <span class="keywordtype">bool</span> result = <span class="keyword">true</span>;</div>
|
|
<div class="line"><a id="l00524" name="l00524"></a><span class="lineno"> 524</span> <span class="keywordflow">while</span> (std::getline(<a class="code hl_namespace" href="namespacefile.html">file</a>, line)) {</div>
|
|
<div class="line"><a id="l00525" name="l00525"></a><span class="lineno"> 525</span> line_number++;</div>
|
|
<div class="line"><a id="l00526" name="l00526"></a><span class="lineno"> 526</span> std::vector<absl::string_view> words =</div>
|
|
<div class="line"><a id="l00527" name="l00527"></a><span class="lineno"> 527</span> absl::StrSplit(line, absl::ByAnyChar(<span class="stringliteral">" \t"</span>), absl::SkipWhitespace());</div>
|
|
<div class="line"><a id="l00528" name="l00528"></a><span class="lineno"> 528</span> <span class="keywordflow">if</span> (words.empty() || words[0] == <span class="stringliteral">"c"</span>) {</div>
|
|
<div class="line"><a id="l00529" name="l00529"></a><span class="lineno"> 529</span> <span class="comment">// Ignore empty and comment lines.</span></div>
|
|
<div class="line"><a id="l00530" name="l00530"></a><span class="lineno"> 530</span> <span class="keywordflow">continue</span>;</div>
|
|
<div class="line"><a id="l00531" name="l00531"></a><span class="lineno"> 531</span> }</div>
|
|
<div class="line"><a id="l00532" name="l00532"></a><span class="lineno"> 532</span> <span class="keywordflow">if</span> (words[0] == <span class="stringliteral">"p"</span>) {</div>
|
|
<div class="line"><a id="l00533" name="l00533"></a><span class="lineno"> 533</span> <span class="keywordflow">if</span> (num_clauses > 0 || words.size() != 4 || words[1] != <span class="stringliteral">"cnf"</span> ||</div>
|
|
<div class="line"><a id="l00534" name="l00534"></a><span class="lineno"> 534</span> !absl::SimpleAtoi(words[2], &num_variables) || num_variables <= 0 ||</div>
|
|
<div class="line"><a id="l00535" name="l00535"></a><span class="lineno"> 535</span> !absl::SimpleAtoi(words[3], &num_clauses) || num_clauses <= 0) {</div>
|
|
<div class="line"><a id="l00536" name="l00536"></a><span class="lineno"> 536</span> <a class="code hl_define" href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a>(<a class="code hl_variable" href="log__severity_8h.html#ac9bcbe19995a8140cd4ec61773cd6e67">ERROR</a>) << <span class="stringliteral">"Invalid content '"</span> << line << <span class="stringliteral">"' at line "</span> << line_number</div>
|
|
<div class="line"><a id="l00537" name="l00537"></a><span class="lineno"> 537</span> << <span class="stringliteral">" of "</span> << file_path;</div>
|
|
<div class="line"><a id="l00538" name="l00538"></a><span class="lineno"> 538</span> result = <span class="keyword">false</span>;</div>
|
|
<div class="line"><a id="l00539" name="l00539"></a><span class="lineno"> 539</span> <span class="keywordflow">break</span>;</div>
|
|
<div class="line"><a id="l00540" name="l00540"></a><span class="lineno"> 540</span> }</div>
|
|
<div class="line"><a id="l00541" name="l00541"></a><span class="lineno"> 541</span> <span class="keywordflow">continue</span>;</div>
|
|
<div class="line"><a id="l00542" name="l00542"></a><span class="lineno"> 542</span> }</div>
|
|
<div class="line"><a id="l00543" name="l00543"></a><span class="lineno"> 543</span> literals.clear();</div>
|
|
<div class="line"><a id="l00544" name="l00544"></a><span class="lineno"> 544</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < words.size(); ++i) {</div>
|
|
<div class="line"><a id="l00545" name="l00545"></a><span class="lineno"> 545</span> <span class="keywordtype">int</span> signed_value;</div>
|
|
<div class="line"><a id="l00546" name="l00546"></a><span class="lineno"> 546</span> <span class="keywordflow">if</span> (!absl::SimpleAtoi(words[i], &signed_value) ||</div>
|
|
<div class="line"><a id="l00547" name="l00547"></a><span class="lineno"> 547</span> std::abs(signed_value) > num_variables ||</div>
|
|
<div class="line"><a id="l00548" name="l00548"></a><span class="lineno"> 548</span> (signed_value == 0 && i != words.size() - 1)) {</div>
|
|
<div class="line"><a id="l00549" name="l00549"></a><span class="lineno"> 549</span> <a class="code hl_define" href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a>(<a class="code hl_variable" href="log__severity_8h.html#ac9bcbe19995a8140cd4ec61773cd6e67">ERROR</a>) << <span class="stringliteral">"Invalid content '"</span> << line << <span class="stringliteral">"' at line "</span> << line_number</div>
|
|
<div class="line"><a id="l00550" name="l00550"></a><span class="lineno"> 550</span> << <span class="stringliteral">" of "</span> << file_path;</div>
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<div class="line"><a id="l00551" name="l00551"></a><span class="lineno"> 551</span> result = <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00552" name="l00552"></a><span class="lineno"> 552</span> <span class="keywordflow">break</span>;</div>
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<div class="line"><a id="l00553" name="l00553"></a><span class="lineno"> 553</span> }</div>
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<div class="line"><a id="l00554" name="l00554"></a><span class="lineno"> 554</span> <span class="keywordflow">if</span> (signed_value != 0) {</div>
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<div class="line"><a id="l00555" name="l00555"></a><span class="lineno"> 555</span> literals.push_back(<a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a>(signed_value));</div>
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<div class="line"><a id="l00556" name="l00556"></a><span class="lineno"> 556</span> }</div>
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<div class="line"><a id="l00557" name="l00557"></a><span class="lineno"> 557</span> }</div>
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<div class="line"><a id="l00558" name="l00558"></a><span class="lineno"> 558</span> drat_checker-><a class="code hl_function" href="classoperations__research_1_1sat_1_1_drat_checker.html#a54bb4f51333a0efceaf20de7b506e4ab">AddProblemClause</a>(literals);</div>
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<div class="line"><a id="l00559" name="l00559"></a><span class="lineno"> 559</span> }</div>
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<div class="line"><a id="l00560" name="l00560"></a><span class="lineno"> 560</span> <a class="code hl_namespace" href="namespacefile.html">file</a>.close();</div>
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<div class="line"><a id="l00561" name="l00561"></a><span class="lineno"> 561</span> <span class="keywordflow">return</span> result;</div>
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<div class="line"><a id="l00562" name="l00562"></a><span class="lineno"> 562</span>}</div>
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<div class="line"><a id="l00563" name="l00563"></a><span class="lineno"> 563</span> </div>
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<div class="line"><a id="l00564" name="l00564"></a><span class="lineno"><a class="line" href="namespaceoperations__research_1_1sat.html#a9736440eb95af5345f44a8bb823b7854"> 564</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#a9736440eb95af5345f44a8bb823b7854">AddInferedAndDeletedClauses</a>(<span class="keyword">const</span> std::string& file_path,</div>
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<div class="line"><a id="l00565" name="l00565"></a><span class="lineno"> 565</span> <a class="code hl_class" href="classoperations__research_1_1sat_1_1_drat_checker.html">DratChecker</a>* drat_checker) {</div>
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<div class="line"><a id="l00566" name="l00566"></a><span class="lineno"> 566</span> <span class="keywordtype">int</span> line_number = 0;</div>
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<div class="line"><a id="l00567" name="l00567"></a><span class="lineno"> 567</span> <span class="keywordtype">bool</span> ends_with_empty_clause = <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00568" name="l00568"></a><span class="lineno"> 568</span> std::vector<Literal> literals;</div>
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<div class="line"><a id="l00569" name="l00569"></a><span class="lineno"> 569</span> std::ifstream <a class="code hl_namespace" href="namespacefile.html">file</a>(file_path);</div>
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<div class="line"><a id="l00570" name="l00570"></a><span class="lineno"> 570</span> std::string line;</div>
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<div class="line"><a id="l00571" name="l00571"></a><span class="lineno"> 571</span> <span class="keywordtype">bool</span> result = <span class="keyword">true</span>;</div>
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<div class="line"><a id="l00572" name="l00572"></a><span class="lineno"> 572</span> <span class="keywordflow">while</span> (std::getline(<a class="code hl_namespace" href="namespacefile.html">file</a>, line)) {</div>
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<div class="line"><a id="l00573" name="l00573"></a><span class="lineno"> 573</span> line_number++;</div>
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<div class="line"><a id="l00574" name="l00574"></a><span class="lineno"> 574</span> std::vector<absl::string_view> words =</div>
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<div class="line"><a id="l00575" name="l00575"></a><span class="lineno"> 575</span> absl::StrSplit(line, absl::ByAnyChar(<span class="stringliteral">" \t"</span>), absl::SkipWhitespace());</div>
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<div class="line"><a id="l00576" name="l00576"></a><span class="lineno"> 576</span> <span class="keywordtype">bool</span> delete_clause = !words.empty() && words[0] == <span class="stringliteral">"d"</span>;</div>
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<div class="line"><a id="l00577" name="l00577"></a><span class="lineno"> 577</span> literals.clear();</div>
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<div class="line"><a id="l00578" name="l00578"></a><span class="lineno"> 578</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = (delete_clause ? 1 : 0); i < words.size(); ++i) {</div>
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<div class="line"><a id="l00579" name="l00579"></a><span class="lineno"> 579</span> <span class="keywordtype">int</span> signed_value;</div>
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<div class="line"><a id="l00580" name="l00580"></a><span class="lineno"> 580</span> <span class="keywordflow">if</span> (!absl::SimpleAtoi(words[i], &signed_value) ||</div>
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<div class="line"><a id="l00581" name="l00581"></a><span class="lineno"> 581</span> (signed_value == 0 && i != words.size() - 1)) {</div>
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<div class="line"><a id="l00582" name="l00582"></a><span class="lineno"> 582</span> <a class="code hl_define" href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a>(<a class="code hl_variable" href="log__severity_8h.html#ac9bcbe19995a8140cd4ec61773cd6e67">ERROR</a>) << <span class="stringliteral">"Invalid content '"</span> << line << <span class="stringliteral">"' at line "</span> << line_number</div>
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|
<div class="line"><a id="l00583" name="l00583"></a><span class="lineno"> 583</span> << <span class="stringliteral">" of "</span> << file_path;</div>
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|
<div class="line"><a id="l00584" name="l00584"></a><span class="lineno"> 584</span> result = <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00585" name="l00585"></a><span class="lineno"> 585</span> <span class="keywordflow">break</span>;</div>
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<div class="line"><a id="l00586" name="l00586"></a><span class="lineno"> 586</span> }</div>
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<div class="line"><a id="l00587" name="l00587"></a><span class="lineno"> 587</span> <span class="keywordflow">if</span> (signed_value != 0) {</div>
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<div class="line"><a id="l00588" name="l00588"></a><span class="lineno"> 588</span> literals.push_back(<a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a>(signed_value));</div>
|
|
<div class="line"><a id="l00589" name="l00589"></a><span class="lineno"> 589</span> }</div>
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|
<div class="line"><a id="l00590" name="l00590"></a><span class="lineno"> 590</span> }</div>
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|
<div class="line"><a id="l00591" name="l00591"></a><span class="lineno"> 591</span> <span class="keywordflow">if</span> (delete_clause) {</div>
|
|
<div class="line"><a id="l00592" name="l00592"></a><span class="lineno"> 592</span> drat_checker-><a class="code hl_function" href="classoperations__research_1_1sat_1_1_drat_checker.html#a18349231154d0f5eaee94fe213f347e6">DeleteClause</a>(literals);</div>
|
|
<div class="line"><a id="l00593" name="l00593"></a><span class="lineno"> 593</span> ends_with_empty_clause = <span class="keyword">false</span>;</div>
|
|
<div class="line"><a id="l00594" name="l00594"></a><span class="lineno"> 594</span> } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a id="l00595" name="l00595"></a><span class="lineno"> 595</span> drat_checker-><a class="code hl_function" href="classoperations__research_1_1sat_1_1_drat_checker.html#a10d374b75761a0418a217cdcf2e89ae4">AddInferedClause</a>(literals);</div>
|
|
<div class="line"><a id="l00596" name="l00596"></a><span class="lineno"> 596</span> ends_with_empty_clause = literals.empty();</div>
|
|
<div class="line"><a id="l00597" name="l00597"></a><span class="lineno"> 597</span> }</div>
|
|
<div class="line"><a id="l00598" name="l00598"></a><span class="lineno"> 598</span> }</div>
|
|
<div class="line"><a id="l00599" name="l00599"></a><span class="lineno"> 599</span> <span class="keywordflow">if</span> (!ends_with_empty_clause) {</div>
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|
<div class="line"><a id="l00600" name="l00600"></a><span class="lineno"> 600</span> drat_checker-><a class="code hl_function" href="classoperations__research_1_1sat_1_1_drat_checker.html#a10d374b75761a0418a217cdcf2e89ae4">AddInferedClause</a>({});</div>
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|
<div class="line"><a id="l00601" name="l00601"></a><span class="lineno"> 601</span> }</div>
|
|
<div class="line"><a id="l00602" name="l00602"></a><span class="lineno"> 602</span> <a class="code hl_namespace" href="namespacefile.html">file</a>.close();</div>
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|
<div class="line"><a id="l00603" name="l00603"></a><span class="lineno"> 603</span> <span class="keywordflow">return</span> result;</div>
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|
<div class="line"><a id="l00604" name="l00604"></a><span class="lineno"> 604</span>}</div>
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|
<div class="line"><a id="l00605" name="l00605"></a><span class="lineno"> 605</span> </div>
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<div class="line"><a id="l00606" name="l00606"></a><span class="lineno"><a class="line" href="namespaceoperations__research_1_1sat.html#a3acd0dba6c4cef0486ae0d2b9d8920a0"> 606</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="namespaceoperations__research_1_1sat.html#a3acd0dba6c4cef0486ae0d2b9d8920a0">PrintClauses</a>(<span class="keyword">const</span> std::string& file_path, <a class="code hl_enumeration" href="namespaceoperations__research_1_1sat.html#a3e51e1435c6412fc4f2a273b3fbee996">SatFormat</a> format,</div>
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|
<div class="line"><a id="l00607" name="l00607"></a><span class="lineno"> 607</span> <span class="keyword">const</span> std::vector<std::vector<Literal>>& <a class="code hl_variable" href="cp__model__solver_8cc.html#a21696c8707868a3d522d1bee261f4185">clauses</a>,</div>
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|
<div class="line"><a id="l00608" name="l00608"></a><span class="lineno"> 608</span> <span class="keywordtype">int</span> num_variables) {</div>
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|
<div class="line"><a id="l00609" name="l00609"></a><span class="lineno"> 609</span> std::ofstream output_stream(file_path, std::ofstream::out);</div>
|
|
<div class="line"><a id="l00610" name="l00610"></a><span class="lineno"> 610</span> <span class="keywordflow">if</span> (format == <a class="code hl_enumvalue" href="namespaceoperations__research_1_1sat.html#a3e51e1435c6412fc4f2a273b3fbee996a7eeb40a554eda8374e34c3734740313d">DIMACS</a>) {</div>
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|
<div class="line"><a id="l00611" name="l00611"></a><span class="lineno"> 611</span> output_stream << <span class="stringliteral">"p cnf "</span> << num_variables << <span class="stringliteral">" "</span> << <a class="code hl_variable" href="cp__model__solver_8cc.html#a21696c8707868a3d522d1bee261f4185">clauses</a>.size() << <span class="stringliteral">"\n"</span>;</div>
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|
<div class="line"><a id="l00612" name="l00612"></a><span class="lineno"> 612</span> }</div>
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|
<div class="line"><a id="l00613" name="l00613"></a><span class="lineno"> 613</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> <span class="keyword">auto</span>& clause : <a class="code hl_variable" href="cp__model__solver_8cc.html#a21696c8707868a3d522d1bee261f4185">clauses</a>) {</div>
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|
<div class="line"><a id="l00614" name="l00614"></a><span class="lineno"> 614</span> <span class="keywordflow">for</span> (<a class="code hl_class" href="classoperations__research_1_1sat_1_1_literal.html">Literal</a> <a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a> : clause) {</div>
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|
<div class="line"><a id="l00615" name="l00615"></a><span class="lineno"> 615</span> output_stream << <a class="code hl_variable" href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a>.<a class="code hl_function" href="classoperations__research_1_1sat_1_1_literal.html#a44fc3f1a79635fadb162d04cec312341">SignedValue</a>() << <span class="stringliteral">" "</span>;</div>
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|
<div class="line"><a id="l00616" name="l00616"></a><span class="lineno"> 616</span> }</div>
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|
<div class="line"><a id="l00617" name="l00617"></a><span class="lineno"> 617</span> output_stream << <span class="stringliteral">"0\n"</span>;</div>
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|
<div class="line"><a id="l00618" name="l00618"></a><span class="lineno"> 618</span> }</div>
|
|
<div class="line"><a id="l00619" name="l00619"></a><span class="lineno"> 619</span> output_stream.close();</div>
|
|
<div class="line"><a id="l00620" name="l00620"></a><span class="lineno"> 620</span> <span class="keywordflow">return</span> output_stream.good();</div>
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|
<div class="line"><a id="l00621" name="l00621"></a><span class="lineno"> 621</span>}</div>
|
|
<div class="line"><a id="l00622" name="l00622"></a><span class="lineno"> 622</span> </div>
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|
<div class="line"><a id="l00623" name="l00623"></a><span class="lineno"> 623</span>} <span class="comment">// namespace sat</span></div>
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|
<div class="line"><a id="l00624" name="l00624"></a><span class="lineno"> 624</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_a3e1cfef60e774a81f30eaddf26a3a274"><div class="ttname"><a href="base_2logging_8h.html#a3e1cfef60e774a81f30eaddf26a3a274">CHECK</a></div><div class="ttdeci">#define CHECK(condition)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00495">base/logging.h:495</a></div></div>
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<div class="ttc" id="abase_2logging_8h_html_a7c0ce053b28d53aa4eaf3eb7fb71663b"><div class="ttname"><a href="base_2logging_8h.html#a7c0ce053b28d53aa4eaf3eb7fb71663b">CHECK_EQ</a></div><div class="ttdeci">#define CHECK_EQ(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00703">base/logging.h:703</a></div></div>
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<div class="ttc" id="abase_2logging_8h_html_accad43a85d781d53381cd53a9894b6ae"><div class="ttname"><a href="base_2logging_8h.html#accad43a85d781d53381cd53a9894b6ae">LOG</a></div><div class="ttdeci">#define LOG(severity)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00420">base/logging.h:420</a></div></div>
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<div class="ttc" id="abase_2logging_8h_html_ae17f8119c108cf3070bad3449c7e0006"><div class="ttname"><a href="base_2logging_8h.html#ae17f8119c108cf3070bad3449c7e0006">DCHECK</a></div><div class="ttdeci">#define DCHECK(condition)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00890">base/logging.h:890</a></div></div>
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<div class="ttc" id="abase_2logging_8h_html_ae89df3243bbb8341130c7b3f44145ea0"><div class="ttname"><a href="base_2logging_8h.html#ae89df3243bbb8341130c7b3f44145ea0">DCHECK_EQ</a></div><div class="ttdeci">#define DCHECK_EQ(val1, val2)</div><div class="ttdef"><b>Definition:</b> <a href="base_2logging_8h_source.html#l00891">base/logging.h:891</a></div></div>
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<div class="ttc" id="aclassabsl_1_1_strong_vector_html_a058bda4957df6a97b1ea6c9fd783f672"><div class="ttname"><a href="classabsl_1_1_strong_vector.html#a058bda4957df6a97b1ea6c9fd783f672">absl::StrongVector::pop_back</a></div><div class="ttdeci">void pop_back()</div><div class="ttdef"><b>Definition:</b> <a href="strong__vector_8h_source.html#l00168">strong_vector.h:168</a></div></div>
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<div class="ttc" id="aclassabsl_1_1_strong_vector_html_a4e3670a285a3642eaa07f66766cffa72"><div class="ttname"><a href="classabsl_1_1_strong_vector.html#a4e3670a285a3642eaa07f66766cffa72">absl::StrongVector::resize</a></div><div class="ttdeci">void resize(size_type new_size)</div><div class="ttdef"><b>Definition:</b> <a href="strong__vector_8h_source.html#l00150">strong_vector.h:150</a></div></div>
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<div class="ttc" id="aclassabsl_1_1_strong_vector_html_a60304b65bf89363bcc3165d3cde67f86"><div class="ttname"><a href="classabsl_1_1_strong_vector.html#a60304b65bf89363bcc3165d3cde67f86">absl::StrongVector::size</a></div><div class="ttdeci">size_type size() const</div><div class="ttdef"><b>Definition:</b> <a href="strong__vector_8h_source.html#l00147">strong_vector.h:147</a></div></div>
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<div class="ttc" id="aclassabsl_1_1_strong_vector_html_a644718bb2fb240de962dc3c9a1fdf0dc"><div class="ttname"><a href="classabsl_1_1_strong_vector.html#a644718bb2fb240de962dc3c9a1fdf0dc">absl::StrongVector::empty</a></div><div class="ttdeci">bool empty() const</div><div class="ttdef"><b>Definition:</b> <a href="strong__vector_8h_source.html#l00156">strong_vector.h:156</a></div></div>
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<div class="ttc" id="aclassabsl_1_1_strong_vector_html_a9263000d449fdccb6cb70b303063e60b"><div class="ttname"><a href="classabsl_1_1_strong_vector.html#a9263000d449fdccb6cb70b303063e60b">absl::StrongVector::push_back</a></div><div class="ttdeci">void push_back(const value_type &x)</div><div class="ttdef"><b>Definition:</b> <a href="strong__vector_8h_source.html#l00158">strong_vector.h:158</a></div></div>
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<div class="ttc" id="aclassabsl_1_1_strong_vector_html_ac8bb3912a3ce86b15842e79d0b421204"><div class="ttname"><a href="classabsl_1_1_strong_vector.html#ac8bb3912a3ce86b15842e79d0b421204">absl::StrongVector::clear</a></div><div class="ttdeci">void clear()</div><div class="ttdef"><b>Definition:</b> <a href="strong__vector_8h_source.html#l00170">strong_vector.h:170</a></div></div>
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<div class="ttc" id="aclassabsl_1_1_strong_vector_html_af71e6c1eccbc12e9339c00a86a981a43"><div class="ttname"><a href="classabsl_1_1_strong_vector.html#af71e6c1eccbc12e9339c00a86a981a43">absl::StrongVector::back</a></div><div class="ttdeci">reference back()</div><div class="ttdef"><b>Definition:</b> <a href="strong__vector_8h_source.html#l00174">strong_vector.h:174</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1_time_limit_html"><div class="ttname"><a href="classoperations__research_1_1_time_limit.html">operations_research::TimeLimit</a></div><div class="ttdoc">A simple class to enforce both an elapsed time limit and a deterministic time limit in the same threa...</div><div class="ttdef"><b>Definition:</b> <a href="time__limit_8h_source.html#l00106">time_limit.h:106</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_drat_checker_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_drat_checker.html">operations_research::sat::DratChecker</a></div><div class="ttdef"><b>Definition:</b> <a href="drat__checker_8h_source.html#l00044">drat_checker.h:44</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_drat_checker_html_a10d374b75761a0418a217cdcf2e89ae4"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_drat_checker.html#a10d374b75761a0418a217cdcf2e89ae4">operations_research::sat::DratChecker::AddInferedClause</a></div><div class="ttdeci">void AddInferedClause(absl::Span< const Literal > clause)</div><div class="ttdef"><b>Definition:</b> <a href="drat__checker_8cc_source.html#l00083">drat_checker.cc:83</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_drat_checker_html_a18349231154d0f5eaee94fe213f347e6"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_drat_checker.html#a18349231154d0f5eaee94fe213f347e6">operations_research::sat::DratChecker::DeleteClause</a></div><div class="ttdeci">void DeleteClause(absl::Span< const Literal > clause)</div><div class="ttdef"><b>Definition:</b> <a href="drat__checker_8cc_source.html#l00125">drat_checker.cc:125</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_drat_checker_html_a29037e50da43e6bda147d22c452fb91d"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_drat_checker.html#a29037e50da43e6bda147d22c452fb91d">operations_research::sat::DratChecker::Check</a></div><div class="ttdeci">Status Check(double max_time_in_seconds)</div><div class="ttdef"><b>Definition:</b> <a href="drat__checker_8cc_source.html#l00153">drat_checker.cc:153</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_drat_checker_html_a3ad1c6b4aef6d5028b7748c2c9330912"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_drat_checker.html#a3ad1c6b4aef6d5028b7748c2c9330912">operations_research::sat::DratChecker::GetUnsatSubProblem</a></div><div class="ttdeci">std::vector< std::vector< Literal > > GetUnsatSubProblem() const</div><div class="ttdef"><b>Definition:</b> <a href="drat__checker_8cc_source.html#l00222">drat_checker.cc:222</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_drat_checker_html_a54bb4f51333a0efceaf20de7b506e4ab"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_drat_checker.html#a54bb4f51333a0efceaf20de7b506e4ab">operations_research::sat::DratChecker::AddProblemClause</a></div><div class="ttdeci">void AddProblemClause(absl::Span< const Literal > clause)</div><div class="ttdef"><b>Definition:</b> <a href="drat__checker_8cc_source.html#l00070">drat_checker.cc:70</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_drat_checker_html_a67a0db04d321a74b7e7fcfd3f1a3f70b"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_drat_checker.html#a67a0db04d321a74b7e7fcfd3f1a3f70b">operations_research::sat::DratChecker::Status</a></div><div class="ttdeci">Status</div><div class="ttdef"><b>Definition:</b> <a href="drat__checker_8h_source.html#l00080">drat_checker.h:80</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_drat_checker_html_a8e3d09e79f9855a586254f5d74b11720"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_drat_checker.html#a8e3d09e79f9855a586254f5d74b11720">operations_research::sat::DratChecker::GetOptimizedProof</a></div><div class="ttdeci">std::vector< std::vector< Literal > > GetOptimizedProof() const</div><div class="ttdef"><b>Definition:</b> <a href="drat__checker_8cc_source.html#l00226">drat_checker.cc:226</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_literal_html_a44fc3f1a79635fadb162d04cec312341"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_literal.html#a44fc3f1a79635fadb162d04cec312341">operations_research::sat::Literal::SignedValue</a></div><div class="ttdeci">int SignedValue() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__base_8h_source.html#l00090">sat_base.h:90</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_literal_html_a886e9c024f7209181c0a850b6e90c644"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_literal.html#a886e9c024f7209181c0a850b6e90c644">operations_research::sat::Literal::Negated</a></div><div class="ttdeci">Literal Negated() const</div><div class="ttdef"><b>Definition:</b> <a href="sat__base_8h_source.html#l00094">sat_base.h:94</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_variables_assignment_html"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_variables_assignment.html">operations_research::sat::VariablesAssignment</a></div><div class="ttdef"><b>Definition:</b> <a href="sat__base_8h_source.html#l00125">sat_base.h:125</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_variables_assignment_html_a142694366986039454f53b38e8378815"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_variables_assignment.html#a142694366986039454f53b38e8378815">operations_research::sat::VariablesAssignment::LiteralIsAssigned</a></div><div class="ttdeci">bool LiteralIsAssigned(Literal literal) const</div><div class="ttdef"><b>Definition:</b> <a href="sat__base_8h_source.html#l00156">sat_base.h:156</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_variables_assignment_html_a5300129913f51dcb0b1c531e3248490e"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_variables_assignment.html#a5300129913f51dcb0b1c531e3248490e">operations_research::sat::VariablesAssignment::LiteralIsTrue</a></div><div class="ttdeci">bool LiteralIsTrue(Literal literal) const</div><div class="ttdef"><b>Definition:</b> <a href="sat__base_8h_source.html#l00153">sat_base.h:153</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_variables_assignment_html_a945bb6c1e83f281fdde5778473a12b37"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_variables_assignment.html#a945bb6c1e83f281fdde5778473a12b37">operations_research::sat::VariablesAssignment::AssignFromTrueLiteral</a></div><div class="ttdeci">void AssignFromTrueLiteral(Literal literal)</div><div class="ttdef"><b>Definition:</b> <a href="sat__base_8h_source.html#l00136">sat_base.h:136</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_variables_assignment_html_ac0fcde8be88b802d340601a4a0441b28"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_variables_assignment.html#ac0fcde8be88b802d340601a4a0441b28">operations_research::sat::VariablesAssignment::UnassignLiteral</a></div><div class="ttdeci">void UnassignLiteral(Literal literal)</div><div class="ttdef"><b>Definition:</b> <a href="sat__base_8h_source.html#l00143">sat_base.h:143</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_variables_assignment_html_acfd1646011e643f58fd7dc66d9cc90a5"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_variables_assignment.html#acfd1646011e643f58fd7dc66d9cc90a5">operations_research::sat::VariablesAssignment::LiteralIsFalse</a></div><div class="ttdeci">bool LiteralIsFalse(Literal literal) const</div><div class="ttdef"><b>Definition:</b> <a href="sat__base_8h_source.html#l00150">sat_base.h:150</a></div></div>
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<div class="ttc" id="aclassoperations__research_1_1sat_1_1_variables_assignment_html_af7fbbd00f0e631ce361b5ce6636b2017"><div class="ttname"><a href="classoperations__research_1_1sat_1_1_variables_assignment.html#af7fbbd00f0e631ce361b5ce6636b2017">operations_research::sat::VariablesAssignment::Resize</a></div><div class="ttdeci">void Resize(int num_variables)</div><div class="ttdef"><b>Definition:</b> <a href="sat__base_8h_source.html#l00129">sat_base.h:129</a></div></div>
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<div class="ttc" id="acp__model__solver_8cc_html_a21696c8707868a3d522d1bee261f4185"><div class="ttname"><a href="cp__model__solver_8cc.html#a21696c8707868a3d522d1bee261f4185">clauses</a></div><div class="ttdeci">SharedClausesManager * clauses</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__solver_8cc_source.html#l02056">cp_model_solver.cc:2056</a></div></div>
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<div class="ttc" id="acp__model__solver_8cc_html_aec8af5c1be4e1b6d4330e1161028de21"><div class="ttname"><a href="cp__model__solver_8cc.html#aec8af5c1be4e1b6d4330e1161028de21">time_limit</a></div><div class="ttdeci">ModelSharedTimeLimit * time_limit</div><div class="ttdef"><b>Definition:</b> <a href="cp__model__solver_8cc_source.html#l02050">cp_model_solver.cc:2050</a></div></div>
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<div class="ttc" id="ademon__profiler_8cc_html_ac072af30c4ffbc834bb4c681f6ecb514"><div class="ttname"><a href="demon__profiler_8cc.html#ac072af30c4ffbc834bb4c681f6ecb514">value</a></div><div class="ttdeci">int64_t value</div><div class="ttdef"><b>Definition:</b> <a href="demon__profiler_8cc_source.html#l00044">demon_profiler.cc:44</a></div></div>
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<div class="ttc" id="adrat__checker_8h_html"><div class="ttname"><a href="drat__checker_8h.html">drat_checker.h</a></div></div>
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<div class="ttc" id="ahash_8h_html"><div class="ttname"><a href="hash_8h.html">hash.h</a></div></div>
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<div class="ttc" id="alog__severity_8h_html_a50e5762f38854b37ee3e2851bc1bb0e7"><div class="ttname"><a href="log__severity_8h.html#a50e5762f38854b37ee3e2851bc1bb0e7">WARNING</a></div><div class="ttdeci">const int WARNING</div><div class="ttdef"><b>Definition:</b> <a href="log__severity_8h_source.html#l00031">log_severity.h:31</a></div></div>
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<div class="ttc" id="alog__severity_8h_html_ab4a2cbab234914b320b7fae11b6e8cb9"><div class="ttname"><a href="log__severity_8h.html#ab4a2cbab234914b320b7fae11b6e8cb9">INFO</a></div><div class="ttdeci">const int INFO</div><div class="ttdef"><b>Definition:</b> <a href="log__severity_8h_source.html#l00031">log_severity.h:31</a></div></div>
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<div class="ttc" id="alog__severity_8h_html_ac9bcbe19995a8140cd4ec61773cd6e67"><div class="ttname"><a href="log__severity_8h.html#ac9bcbe19995a8140cd4ec61773cd6e67">ERROR</a></div><div class="ttdeci">const int ERROR</div><div class="ttdef"><b>Definition:</b> <a href="log__severity_8h_source.html#l00032">log_severity.h:32</a></div></div>
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<div class="ttc" id="amatrix__utils_8cc_html_a95d4078c018ac04247ee3785eab30e7b"><div class="ttname"><a href="matrix__utils_8cc.html#a95d4078c018ac04247ee3785eab30e7b">hash</a></div><div class="ttdeci">int64_t hash</div><div class="ttdef"><b>Definition:</b> <a href="matrix__utils_8cc_source.html#l00061">matrix_utils.cc:61</a></div></div>
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<div class="ttc" id="anamespacefile_html"><div class="ttname"><a href="namespacefile.html">file</a></div><div class="ttdef"><b>Definition:</b> <a href="base_2file_8cc_source.html#l00141">base/file.cc:141</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_1_1glop_html_ac89c7b45754e9a6bdabc08bea586fc4e"><div class="ttname"><a href="namespaceoperations__research_1_1glop.html#ac89c7b45754e9a6bdabc08bea586fc4e">operations_research::glop::Index</a></div><div class="ttdeci">int32_t Index</div><div class="ttdef"><b>Definition:</b> <a href="lp__types_8h_source.html#l00038">lp_types.h:38</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_1_1math__opt_html_a5de89a1f6e3f80a49a0d76136d8044e2"><div class="ttname"><a href="namespaceoperations__research_1_1math__opt.html#a5de89a1f6e3f80a49a0d76136d8044e2">operations_research::math_opt::swap</a></div><div class="ttdeci">void swap(IdMap< K, V > &a, IdMap< K, V > &b)</div><div class="ttdef"><b>Definition:</b> <a href="id__map_8h_source.html#l00262">id_map.h:262</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_a3acd0dba6c4cef0486ae0d2b9d8920a0"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a3acd0dba6c4cef0486ae0d2b9d8920a0">operations_research::sat::PrintClauses</a></div><div class="ttdeci">bool PrintClauses(const std::string &file_path, SatFormat format, const std::vector< std::vector< Literal > > &clauses, int num_variables)</div><div class="ttdef"><b>Definition:</b> <a href="drat__checker_8cc_source.html#l00606">drat_checker.cc:606</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_1_1sat_html_a3e51e1435c6412fc4f2a273b3fbee996"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a3e51e1435c6412fc4f2a273b3fbee996">operations_research::sat::SatFormat</a></div><div class="ttdeci">SatFormat</div><div class="ttdef"><b>Definition:</b> <a href="drat__checker_8h_source.html#l00330">drat_checker.h:330</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_1_1sat_html_a3e51e1435c6412fc4f2a273b3fbee996a7eeb40a554eda8374e34c3734740313d"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a3e51e1435c6412fc4f2a273b3fbee996a7eeb40a554eda8374e34c3734740313d">operations_research::sat::DIMACS</a></div><div class="ttdeci">@ DIMACS</div><div class="ttdef"><b>Definition:</b> <a href="drat__checker_8h_source.html#l00331">drat_checker.h:331</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_1_1sat_html_a5a48aae9891af96b29504592d319cba6"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a5a48aae9891af96b29504592d319cba6">operations_research::sat::Resolve</a></div><div class="ttdeci">bool Resolve(absl::Span< const Literal > clause, absl::Span< const Literal > other_clause, Literal complementary_literal, VariablesAssignment *assignment, std::vector< Literal > *resolvent)</div><div class="ttdef"><b>Definition:</b> <a href="drat__checker_8cc_source.html#l00478">drat_checker.cc:478</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_1_1sat_html_a9736440eb95af5345f44a8bb823b7854"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#a9736440eb95af5345f44a8bb823b7854">operations_research::sat::AddInferedAndDeletedClauses</a></div><div class="ttdeci">bool AddInferedAndDeletedClauses(const std::string &file_path, DratChecker *drat_checker)</div><div class="ttdef"><b>Definition:</b> <a href="drat__checker_8cc_source.html#l00564">drat_checker.cc:564</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_1_1sat_html_add4d19635eabde70c0aa36e1a6847df7"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#add4d19635eabde70c0aa36e1a6847df7">operations_research::sat::ContainsLiteral</a></div><div class="ttdeci">bool ContainsLiteral(absl::Span< const Literal > clause, Literal literal)</div><div class="ttdef"><b>Definition:</b> <a href="drat__checker_8cc_source.html#l00474">drat_checker.cc:474</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_1_1sat_html_afbf73f9bc417ac7511fdd2bc4ab27c22"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#afbf73f9bc417ac7511fdd2bc4ab27c22">operations_research::sat::AddProblemClauses</a></div><div class="ttdeci">bool AddProblemClauses(const std::string &file_path, DratChecker *drat_checker)</div><div class="ttdef"><b>Definition:</b> <a href="drat__checker_8cc_source.html#l00515">drat_checker.cc:515</a></div></div>
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<div class="ttc" id="anamespaceoperations__research_1_1sat_html_affcb42181de5b23ba7b5df37fe1676a3"><div class="ttname"><a href="namespaceoperations__research_1_1sat.html#affcb42181de5b23ba7b5df37fe1676a3">operations_research::sat::kNoClauseIndex</a></div><div class="ttdeci">const ClauseIndex kNoClauseIndex(-1)</div></div>
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<div class="ttc" id="anamespaceoperations__research_html"><div class="ttname"><a href="namespaceoperations__research.html">operations_research</a></div><div class="ttdoc">Collection of objects used to extend the Constraint Solver library.</div><div class="ttdef"><b>Definition:</b> <a href="dense__doubly__linked__list_8h_source.html#l00021">dense_doubly_linked_list.h:21</a></div></div>
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<div class="ttc" id="anamespaceutil__hash_html_a17715af1c1bc575a706eb167371b81e9"><div class="ttname"><a href="namespaceutil__hash.html#a17715af1c1bc575a706eb167371b81e9">util_hash::Hash</a></div><div class="ttdeci">uint64_t Hash(uint64_t num, uint64_t c)</div><div class="ttdef"><b>Definition:</b> <a href="hash_8h_source.html#l00150">hash.h:150</a></div></div>
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<div class="ttc" id="aoptimization_8cc_html_af63dcc00f2023fdf498e0829e6fb8a6b"><div class="ttname"><a href="optimization_8cc.html#af63dcc00f2023fdf498e0829e6fb8a6b">literal</a></div><div class="ttdeci">Literal literal</div><div class="ttdef"><b>Definition:</b> <a href="optimization_8cc_source.html#l00089">optimization.cc:89</a></div></div>
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<div class="ttc" id="asat__base_8h_html"><div class="ttname"><a href="sat__base_8h.html">sat_base.h</a></div></div>
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<div class="ttc" id="asparse__submatrix_8cc_html_a4d53eac2ef2732c28fa9fb663e0c19a7"><div class="ttname"><a href="sparse__submatrix_8cc.html#a4d53eac2ef2732c28fa9fb663e0c19a7">end</a></div><div class="ttdeci">std::optional< int64_t > end</div><div class="ttdef"><b>Definition:</b> <a href="sparse__submatrix_8cc_source.html#l00036">sparse_submatrix.cc:36</a></div></div>
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<div class="ttc" id="astrong__integers_8h_html"><div class="ttname"><a href="strong__integers_8h.html">strong_integers.h</a></div></div>
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<div class="ttc" id="astrong__vector_8h_html"><div class="ttname"><a href="strong__vector_8h.html">strong_vector.h</a></div></div>
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