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/********************* */
/*! \file aig_bitblaster.h
** \verbatim
** Top contributors (to current version):
** Liana Hadarean, Mathias Preiner, Andres Noetzli
** This file is part of the CVC4 project.
** Copyright (c) 2009-2019 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 AIG bitblaster.
**
** AIG Bitblaster based on ABC.
**/
#include "cvc4_private.h"
#ifndef CVC4__THEORY__BV__BITBLAST__AIG_BITBLASTER_H
#define CVC4__THEORY__BV__BITBLAST__AIG_BITBLASTER_H
#include "theory/bv/bitblast/bitblaster.h"
#include "prop/sat_solver.h"
class Abc_Obj_t_;
typedef Abc_Obj_t_ Abc_Obj_t;
class Abc_Ntk_t_;
typedef Abc_Ntk_t_ Abc_Ntk_t;
class Abc_Aig_t_;
typedef Abc_Aig_t_ Abc_Aig_t;
class Cnf_Dat_t_;
typedef Cnf_Dat_t_ Cnf_Dat_t;
namespace CVC4 {
namespace theory {
namespace bv {
#ifdef CVC4_USE_ABC
class AigBitblaster : public TBitblaster<Abc_Obj_t*>
{
public:
AigBitblaster(Environment* env);
~AigBitblaster();
void makeVariable(TNode node, Bits& bits) override;
void bbTerm(TNode node, Bits& bits) override;
void bbAtom(TNode node) override;
Abc_Obj_t* bbFormula(TNode formula);
bool solve(TNode query);
static Abc_Aig_t* currentAigM();
static Abc_Ntk_t* currentAigNtk();
private:
typedef std::unordered_map<TNode, Abc_Obj_t*, TNodeHashFunction> TNodeAigMap;
typedef std::unordered_map<Node, Abc_Obj_t*, NodeHashFunction> NodeAigMap;
static thread_local Abc_Ntk_t* s_abcAigNetwork;
std::unique_ptr<context::Context> d_nullContext;
std::unique_ptr<prop::SatSolver> d_satSolver;
TNodeAigMap d_aigCache;
NodeAigMap d_bbAtoms;
NodeAigMap d_nodeToAigInput;
// the thing we are checking for sat
Abc_Obj_t* d_aigOutputNode;
std::unique_ptr<MinisatEmptyNotify> d_notify;
void addAtom(TNode atom);
void simplifyAig();
void storeBBAtom(TNode atom, Abc_Obj_t* atom_bb) override;
Abc_Obj_t* getBBAtom(TNode atom) const override;
bool hasBBAtom(TNode atom) const override;
void cacheAig(TNode node, Abc_Obj_t* aig);
bool hasAig(TNode node);
Abc_Obj_t* getAig(TNode node);
Abc_Obj_t* mkInput(TNode input);
bool hasInput(TNode input);
void convertToCnfAndAssert();
void assertToSatSolver(Cnf_Dat_t* pCnf);
Node getModelFromSatSolver(TNode a, bool fullModel) override
{
Unreachable();
}
prop::SatSolver* getSatSolver() override { return d_satSolver.get(); }
void setProofLog(proof::BitVectorProof* bvp) override
{
// Proofs are currently not supported with ABC
Unimplemented();
}
class Statistics
{
public:
IntStat d_numClauses;
IntStat d_numVariables;
TimerStat d_simplificationTime;
TimerStat d_cnfConversionTime;
TimerStat d_solveTime;
Statistics();
~Statistics();
};
Statistics d_statistics;
};
#else /* CVC4_USE_ABC */
/**
* Dummy version of the AigBitblaster class that cannot be instantiated s.t. we
* can declare `std::unique_ptr<AigBitblaster>` without ABC.
*/
class AigBitblaster : public TBitblaster<Abc_Obj_t*>
{
AigBitblaster() = delete;
};
#endif /* CVC4_USE_ABC */
} // namespace bv
} // namespace theory
} // namespace CVC4
#endif // CVC4__THEORY__BV__BITBLAST__AIG_BITBLASTER_H
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