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/********************* */
/*! \file bvminisat.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 (bitvectors).
**/
#pragma once
#include "prop/sat_solver.h"
#include "prop/sat_solver_registry.h"
#include "prop/bvminisat/simp/SimpSolver.h"
namespace CVC4 {
namespace prop {
class BVMinisatSatSolver: public BVSatSolverInterface {
BVMinisat::SimpSolver* d_minisat;
public:
BVMinisatSatSolver();
~BVMinisatSatSolver();
void addClause(SatClause& clause, bool removable);
SatVariable newVar(bool theoryAtom = false);
void markUnremovable(SatLiteral lit);
void interrupt();
SatValue solve();
SatValue solve(long unsigned int&);
SatValue solve(const context::CDList<SatLiteral> & assumptions);
void getUnsatCore(SatClause& unsatCore);
SatValue value(SatLiteral l);
SatValue modelValue(SatLiteral l);
void unregisterVar(SatLiteral lit);
void renewVar(SatLiteral lit, int level = -1);
unsigned getAssertionLevel() const;
// helper methods for converting from the internal Minisat representation
static SatVariable toSatVariable(BVMinisat::Var var);
static BVMinisat::Lit toMinisatLit(SatLiteral lit);
static SatLiteral toSatLiteral(BVMinisat::Lit lit);
static SatValue toSatLiteralValue(bool res);
static SatValue toSatLiteralValue(BVMinisat::lbool res);
static void toMinisatClause(SatClause& clause, BVMinisat::vec<BVMinisat::Lit>& minisat_clause);
static void toSatClause (BVMinisat::vec<BVMinisat::Lit>& clause, SatClause& sat_clause);
class Statistics {
public:
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;
ReferenceStat<int> d_statEliminatedVars;
Statistics();
~Statistics();
void init(BVMinisat::SimpSolver* minisat);
};
Statistics d_statistics;
};
template class SatSolverConstructor<BVMinisatSatSolver>;
}
}
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