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/******************************************************************************
* Top contributors (to current version):
* Kshitij Bansal, Andrew Reynolds, Mathias Preiner
*
* This file is part of the cvc5 project.
*
* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS
* in the top-level source directory and their institutional affiliations.
* All rights reserved. See the file COPYING in the top-level source
* directory for licensing information.
* ****************************************************************************
*
* Decision strategy.
*/
#include "cvc5_private.h"
#ifndef CVC5__DECISION__DECISION_STRATEGY_H
#define CVC5__DECISION__DECISION_STRATEGY_H
#include <vector>
#include "expr/node.h"
#include "prop/sat_solver_types.h"
#include "smt/term_formula_removal.h"
namespace cvc5 {
class DecisionEngineOld;
namespace context {
class Context;
} // namespace context
namespace decision {
class DecisionEngine;
class DecisionStrategy {
protected:
DecisionEngineOld* d_decisionEngine;
public:
DecisionStrategy(DecisionEngineOld* de, context::Context* c)
: d_decisionEngine(de)
{
}
virtual ~DecisionStrategy() { }
virtual prop::SatLiteral getNext(bool&) = 0;
};/* class DecisionStrategy */
class ITEDecisionStrategy : public DecisionStrategy {
public:
ITEDecisionStrategy(DecisionEngineOld* de, context::Context* c)
: DecisionStrategy(de, c)
{
}
/**
* Add that assertion is an (input) assertion, not corresponding to a
* skolem definition.
*/
virtual void addAssertion(TNode assertion) = 0;
/**
* Add that lem is the skolem definition for skolem, which is a part of
* the current assertions.
*/
virtual void addSkolemDefinition(TNode lem, TNode skolem) = 0;
};/* class ITEDecisionStrategy */
} // namespace decision
} // namespace cvc5
#endif /* CVC5__DECISION__DECISION_STRATEGY_H */
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