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/********************* */
/*! \file eager_bitblaster.h
** \verbatim
** Top contributors (to current version):
** Mathias Preiner, Andres Noetzli
** This file is part of the CVC4 project.
** Copyright (c) 2009-2018 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 Bitblaster for eager BV solver.
**
** Bitblaster for the eager BV solver.
**/
#include "cvc4_private.h"
#ifndef __CVC4__THEORY__BV__BITBLAST__EAGER_BITBLASTER_H
#define __CVC4__THEORY__BV__BITBLAST__EAGER_BITBLASTER_H
#include <unordered_set>
#include "theory/bv/bitblast/bitblaster.h"
#include "prop/cnf_stream.h"
#include "prop/sat_solver.h"
namespace CVC4 {
namespace theory {
namespace bv {
class BitblastingRegistrar;
class TheoryBV;
class EagerBitblaster : public TBitblaster<Node>
{
public:
EagerBitblaster(TheoryBV* theory_bv);
~EagerBitblaster();
void addAtom(TNode atom);
void makeVariable(TNode node, Bits& bits) override;
void bbTerm(TNode node, Bits& bits) override;
void bbAtom(TNode node) override;
Node getBBAtom(TNode node) const override;
bool hasBBAtom(TNode atom) const override;
void bbFormula(TNode formula);
void storeBBAtom(TNode atom, Node atom_bb) override;
void storeBBTerm(TNode node, const Bits& bits) override;
bool assertToSat(TNode node, bool propagate = true);
bool solve();
bool collectModelInfo(TheoryModel* m, bool fullModel);
void setProofLog(BitVectorProof* bvp);
private:
std::unique_ptr<context::Context> d_nullContext;
typedef std::unordered_set<TNode, TNodeHashFunction> TNodeSet;
// sat solver used for bitblasting and associated CnfStream
std::unique_ptr<prop::SatSolver> d_satSolver;
std::unique_ptr<BitblastingRegistrar> d_bitblastingRegistrar;
std::unique_ptr<prop::CnfStream> d_cnfStream;
TheoryBV* d_bv;
TNodeSet d_bbAtoms;
TNodeSet d_variables;
// This is either an MinisatEmptyNotify or NULL.
std::unique_ptr<MinisatEmptyNotify> d_notify;
Node getModelFromSatSolver(TNode a, bool fullModel) override;
bool isSharedTerm(TNode node);
};
class BitblastingRegistrar : public prop::Registrar
{
public:
BitblastingRegistrar(EagerBitblaster* bb) : d_bitblaster(bb) {}
void preRegister(Node n) override { d_bitblaster->bbAtom(n); }
private:
EagerBitblaster* d_bitblaster;
};
} // namespace bv
} // namespace theory
} // namespace CVC4
#endif // __CVC4__THEORY__BV__BITBLAST__EAGER_BITBLASTER_H
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