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/********************* */
/*! \file kissat.h
** \verbatim
** Top contributors (to current version):
** Aina Niemetz
** This file is part of the CVC4 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.\endverbatim
**
** \brief Wrapper for Kissat SAT Solver.
**
** Wrapper for the Kissat SAT solver (for theory of bit-vectors).
**/
#include "cvc4_private.h"
#ifndef CVC5__PROP__KISSAT_H
#define CVC5__PROP__KISSAT_H
#ifdef CVC4_USE_KISSAT
#include "prop/sat_solver.h"
#include "util/stats_timer.h"
extern "C" {
#include <kissat/kissat.h>
}
namespace cvc5 {
namespace prop {
class KissatSolver : public SatSolver
{
friend class SatSolverFactory;
public:
~KissatSolver() override;
ClauseId addClause(SatClause& clause, bool removable) override;
ClauseId addXorClause(SatClause& clause, bool rhs, bool removable) override;
SatVariable newVar(bool isTheoryAtom = false,
bool preRegister = false,
bool canErase = true) override;
SatVariable trueVar() override;
SatVariable falseVar() override;
SatValue solve() override;
SatValue solve(long unsigned int&) override;
SatValue solve(const std::vector<SatLiteral>& assumptions) override;
void interrupt() override;
SatValue value(SatLiteral l) override;
SatValue modelValue(SatLiteral l) override;
unsigned getAssertionLevel() const override;
bool ok() const override;
private:
struct Statistics
{
StatisticsRegistry* d_registry;
IntStat d_numSatCalls;
IntStat d_numVariables;
IntStat d_numClauses;
TimerStat d_solveTime;
Statistics(StatisticsRegistry* registry, const std::string& prefix);
~Statistics();
};
/**
* Private to disallow creation outside of SatSolverFactory.
* Function init() must be called after creation.
*/
KissatSolver(StatisticsRegistry* registry, const std::string& name = "");
/**
* Initialize SAT solver instance.
* Note: Split out to not call virtual functions in constructor.
*/
void init();
kissat* d_solver;
unsigned d_nextVarIdx;
bool d_okay;
SatVariable d_true;
SatVariable d_false;
Statistics d_statistics;
};
} // namespace prop
} // namespace cvc5
#endif // CVC4_USE_KISSAT
#endif // CVC5__PROP__KISSAT_H
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