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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) 2009-2014 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 interface for cvc4.
**/
#pragma once
#include "prop/sat_solver.h"
#include "prop/minisat/simp/SimpSolver.h"
#include "util/statistics_registry.h"
namespace CVC4 {
namespace prop {
class MinisatSatSolver : public DPLLSatSolverInterface {
public:
MinisatSatSolver(StatisticsRegistry* registry);
~MinisatSatSolver() throw();
;
static SatVariable toSatVariable(Minisat::Var var);
static Minisat::Lit toMinisatLit(SatLiteral lit);
static SatLiteral toSatLiteral(Minisat::Lit lit);
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 (const Minisat::Clause& clause, SatClause& sat_clause);
void initialize(context::Context* context, TheoryProxy* theoryProxy);
ClauseId addClause(SatClause& clause, bool removable);
ClauseId addXorClause(SatClause& clause, bool rhs, bool removable) {
Unreachable("Minisat does not support native XOR reasoning");
}
SatVariable newVar(bool isTheoryAtom, bool preRegister, bool canErase);
SatVariable trueVar() { return d_minisat->trueVar(); }
SatVariable falseVar() { return d_minisat->falseVar(); }
SatValue solve();
SatValue solve(long unsigned int&);
bool ok() const;
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 requirePhase(SatLiteral lit);
bool flipDecision();
bool isDecision(SatVariable decn) const;
private:
/** The SatSolver used */
Minisat::SimpSolver* d_minisat;
/** Context we will be using to synchronize the sat solver */
context::Context* d_context;
void setupOptions();
class Statistics {
private:
StatisticsRegistry* d_registry;
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(StatisticsRegistry* registry);
~Statistics();
void init(Minisat::SimpSolver* d_minisat);
};/* class MinisatSatSolver::Statistics */
Statistics d_statistics;
};/* class MinisatSatSolver */
}/* CVC4::prop namespace */
}/* CVC4 namespace */
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