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/********************* */
/*! \file minisat.h
** \verbatim
** Original author: dejan
** Major contributors:
** Minor contributors (to current version):
** This file is part of the CVC4 prototype.
** Copyright (c) 2009, 2010, 2011 The Analysis of Computer Systems Group (ACSys)
** Courant Institute of Mathematical Sciences
** New York University
** See the file COPYING in the top-level source directory for licensing
** information.\endverbatim
**
** \brief SAT Solver.
**
** Implementation of the minisat for cvc4.
**/
#pragma once
#include "prop/sat_solver.h"
#include "prop/sat_solver_registry.h"
#include "prop/minisat/simp/SimpSolver.h"
namespace CVC4 {
namespace prop {
class MinisatSatSolver : public DPLLSatSolverInterface {
/** The SatSolver used */
Minisat::SimpSolver* d_minisat;
/** The SatSolver uses this to communicate with the theories */
TheoryProxy* d_theoryProxy;
/** Context we will be using to synchronzie the sat solver */
context::Context* d_context;
public:
MinisatSatSolver ();
~MinisatSatSolver();
static SatVariable toSatVariable(Minisat::Var var);
static Minisat::Lit toMinisatLit(SatLiteral lit);
static SatLiteral toSatLiteral(Minisat::Lit lit);
static SatValue toSatLiteralValue(bool res);
static SatValue toSatLiteralValue(Minisat::lbool res);
static Minisat::lbool toMinisatlbool(SatValue val);
//(Commented because not in use) static bool tobool(SatValue val);
static void toMinisatClause(SatClause& clause, Minisat::vec<Minisat::Lit>& minisat_clause);
static void toSatClause (Minisat::vec<Minisat::Lit>& clause, SatClause& sat_clause);
void initialize(context::Context* context, TheoryProxy* theoryProxy);
void addClause(SatClause& clause, bool removable);
SatVariable newVar(bool theoryAtom = false);
SatVariable trueVar() { return d_minisat->trueVar(); }
SatVariable falseVar() { return d_minisat->falseVar(); }
SatValue solve();
SatValue solve(long unsigned int&);
void interrupt();
SatValue value(SatLiteral l);
SatValue modelValue(SatLiteral l);
bool properExplanation(SatLiteral lit, SatLiteral expl) const;
/** Incremental interface */
unsigned getAssertionLevel() const;
void push();
void pop();
void unregisterVar(SatLiteral lit);
void renewVar(SatLiteral lit, int level = -1);
void requirePhase(SatLiteral lit);
bool flipDecision();
bool isDecision(SatVariable decn) const;
class Statistics {
private:
ReferenceStat<uint64_t> d_statStarts, d_statDecisions;
ReferenceStat<uint64_t> d_statRndDecisions, d_statPropagations;
ReferenceStat<uint64_t> d_statConflicts, d_statClausesLiterals;
ReferenceStat<uint64_t> d_statLearntsLiterals, d_statMaxLiterals;
ReferenceStat<uint64_t> d_statTotLiterals;
public:
Statistics();
~Statistics();
void init(Minisat::SimpSolver* d_minisat);
};
Statistics d_statistics;
};
} // prop namespace
} // cvc4 namespace
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