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/****************************************************************************** |
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* Top contributors (to current version): |
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* Kshitij Bansal, Andrew Reynolds, Mathias Preiner |
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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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* Decision strategy. |
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*/ |
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#include "cvc5_private.h" |
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#ifndef CVC5__DECISION__DECISION_STRATEGY_H |
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#define CVC5__DECISION__DECISION_STRATEGY_H |
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#include <vector> |
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#include "expr/node.h" |
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#include "prop/sat_solver_types.h" |
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#include "smt/env_obj.h" |
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#include "smt/term_formula_removal.h" |
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namespace cvc5 { |
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class DecisionEngineOld; |
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namespace decision { |
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class DecisionStrategy : protected EnvObj |
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{ |
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public: |
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DecisionStrategy(Env& env, DecisionEngineOld* de) |
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: EnvObj(env), d_decisionEngine(de) |
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{ |
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} |
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virtual ~DecisionStrategy() { } |
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virtual prop::SatLiteral getNext(bool&) = 0; |
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protected: |
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DecisionEngineOld* d_decisionEngine; |
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};/* class DecisionStrategy */ |
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class ITEDecisionStrategy : public DecisionStrategy { |
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public: |
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ITEDecisionStrategy(Env& env, DecisionEngineOld* de) |
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: DecisionStrategy(env, de) |
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{ |
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} |
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/** |
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* Add that assertion is an (input) assertion, not corresponding to a |
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* skolem definition. |
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*/ |
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virtual void addAssertion(TNode assertion) = 0; |
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/** |
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* Add that lem is the skolem definition for skolem, which is a part of |
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* the current assertions. |
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*/ |
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virtual void addSkolemDefinition(TNode lem, TNode skolem) = 0; |
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};/* class ITEDecisionStrategy */ |
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} // namespace decision |
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} // namespace cvc5 |
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#endif /* CVC5__DECISION__DECISION_STRATEGY_H */ |