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/****************************************************************************** |
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* Top contributors (to current version): |
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* Mathias Preiner, Liana Hadarean, Aina Niemetz |
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* |
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* This file is part of the cvc5 project. |
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* |
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* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS |
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* in the top-level source directory and their institutional affiliations. |
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* All rights reserved. See the file COPYING in the top-level source |
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* directory for licensing information. |
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* **************************************************************************** |
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* |
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* Algebraic solver. |
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*/ |
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#include "cvc5_private.h" |
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#ifndef CVC5__THEORY__BV__BV_SUBTHEORY__INEQUALITY_H |
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#define CVC5__THEORY__BV__BV_SUBTHEORY__INEQUALITY_H |
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#include <unordered_set> |
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#include "context/cdhashset.h" |
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#include "expr/attribute.h" |
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#include "theory/bv/bv_inequality_graph.h" |
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#include "theory/bv/bv_subtheory.h" |
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namespace cvc5 { |
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namespace theory { |
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namespace bv { |
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/** Cache for InequalitySolver::isInequalityOnly() */ |
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struct IneqOnlyAttributeId |
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{ |
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}; |
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typedef expr::Attribute<IneqOnlyAttributeId, bool> IneqOnlyAttribute; |
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/** Whether the above has been computed yet or not for an expr */ |
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struct IneqOnlyComputedAttributeId |
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{ |
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}; |
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typedef expr::Attribute<IneqOnlyComputedAttributeId, bool> |
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IneqOnlyComputedAttribute; |
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class InequalitySolver : public SubtheorySolver |
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{ |
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struct Statistics |
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{ |
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IntStat d_numCallstoCheck; |
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TimerStat d_solveTime; |
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Statistics(); |
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}; |
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context::CDHashSet<Node> d_assertionSet; |
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InequalityGraph d_inequalityGraph; |
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context::CDHashMap<Node, TNode> d_explanations; |
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context::CDO<bool> d_isComplete; |
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typedef std::unordered_set<Node> NodeSet; |
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NodeSet d_ineqTerms; |
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bool isInequalityOnly(TNode node); |
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bool addInequality(TNode a, TNode b, bool strict, TNode fact); |
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Statistics d_statistics; |
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public: |
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InequalitySolver(context::Context* c, context::Context* u, BVSolverLazy* bv) |
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: SubtheorySolver(c, bv), |
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d_assertionSet(c), |
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d_inequalityGraph(c, u), |
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d_explanations(c), |
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d_isComplete(c, true), |
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d_ineqTerms(), |
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d_statistics() |
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{ |
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} |
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bool check(Theory::Effort e) override; |
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void propagate(Theory::Effort e) override; |
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void explain(TNode literal, std::vector<TNode>& assumptions) override; |
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bool isComplete() override { return d_isComplete; } |
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bool collectModelValues(TheoryModel* m, |
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const std::set<Node>& termSet) override; |
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Node getModelValue(TNode var) override; |
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EqualityStatus getEqualityStatus(TNode a, TNode b) override; |
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void assertFact(TNode fact) override; |
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void preRegister(TNode node) override; |
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}; |
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} // namespace bv |
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} // namespace theory |
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} // namespace cvc5 |
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#endif /* CVC5__THEORY__BV__BV_SUBTHEORY__INEQUALITY_H */ |