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