blob: f198210673d48d5061a7148c3ace870ebf009c93 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
/******************************************************************************
* Top contributors (to current version):
* Mathias Preiner, Liana Hadarean, Aina Niemetz
*
* This file is part of the cvc5 project.
*
* Copyright (c) 2009-2021 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.
* ****************************************************************************
*
* SAT Solver.
*
* Implementation of the cryptominisat sat solver for cvc4 (bit-vectors).
*/
#include "cvc5_private.h"
#ifndef CVC5__PROP__CRYPTOMINISAT_H
#define CVC5__PROP__CRYPTOMINISAT_H
#ifdef CVC5_USE_CRYPTOMINISAT
#include "prop/sat_solver.h"
// Cryptominisat has name clashes with the other Minisat implementations since
// the Minisat implementations export var_Undef, l_True, ... as macro whereas
// Cryptominisat uses static const. In order to avoid these conflicts we
// forward declare CMSat::SATSolver and include the cryptominisat header only
// in cryptominisat.cpp.
namespace CMSat {
class SATSolver;
}
namespace cvc5 {
namespace prop {
class CryptoMinisatSolver : public SatSolver
{
friend class SatSolverFactory;
public:
~CryptoMinisatSolver() override;
ClauseId addClause(SatClause& clause, bool removable) override;
ClauseId addXorClause(SatClause& clause, bool rhs, bool removable) override;
bool nativeXor() override { return true; }
SatVariable newVar(bool isTheoryAtom = false,
bool preRegister = false,
bool canErase = true) override;
SatVariable trueVar() override;
SatVariable falseVar() override;
void markUnremovable(SatLiteral lit);
void interrupt() override;
SatValue solve() override;
SatValue solve(long unsigned int&) override;
SatValue solve(const std::vector<SatLiteral>& assumptions) override;
void getUnsatAssumptions(std::vector<SatLiteral>& assumptions) override;
bool ok() const override;
SatValue value(SatLiteral l) override;
SatValue modelValue(SatLiteral l) override;
unsigned getAssertionLevel() const override;
private:
class Statistics
{
public:
IntStat d_statCallsToSolve;
IntStat d_xorClausesAdded;
IntStat d_clausesAdded;
TimerStat d_solveTime;
Statistics(StatisticsRegistry& registry, const std::string& prefix);
};
/**
* Private to disallow creation outside of SatSolverFactory.
* Function init() must be called after creation.
*/
CryptoMinisatSolver(StatisticsRegistry& registry,
const std::string& name = "");
/**
* Initialize SAT solver instance.
* Note: Split out to not call virtual functions in constructor.
*/
void init();
std::unique_ptr<CMSat::SATSolver> d_solver;
unsigned d_numVariables;
bool d_okay;
SatVariable d_true;
SatVariable d_false;
Statistics d_statistics;
};
} // namespace prop
} // namespace cvc5
#endif // CVC5_USE_CRYPTOMINISAT
#endif // CVC5__PROP__CRYPTOMINISAT_H
|