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
110
|
/********************* */
/*! \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"
#include "context/cdo.h"
namespace CVC4 {
namespace prop {
class BVMinisatSatSolver: public BVSatSolverInterface, public context::ContextNotifyObj {
BVMinisat::SimpSolver* d_minisat;
unsigned d_solveCount;
unsigned d_assertionsCount;
context::CDO<unsigned> d_assertionsRealCount;
context::CDO<unsigned> d_lastPropagation;
public:
BVMinisatSatSolver() :
ContextNotifyObj(NULL, false),
d_assertionsRealCount(NULL, (unsigned)0),
d_lastPropagation(NULL, (unsigned)0)
{ Unreachable(); }
BVMinisatSatSolver(context::Context* mainSatContext);
~BVMinisatSatSolver() throw(AssertionException);
void addClause(SatClause& clause, bool removable);
SatVariable newVar(bool theoryAtom = false);
void markUnremovable(SatLiteral lit);
void interrupt();
void notify();
SatValue solve();
SatValue solve(long unsigned int&);
SatValue solve(bool quick_solve);
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);
void addMarkerLiteral(SatLiteral lit);
bool getPropagations(std::vector<SatLiteral>& propagations);
void explainPropagation(SatLiteral lit, std::vector<SatLiteral>& explanation);
SatValue assertAssumption(SatLiteral lit, bool propagate);
void popAssumption();
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;
IntStat d_statCallsToSolve;
BackedStat<double> d_statSolveTime;
Statistics();
~Statistics();
void init(BVMinisat::SimpSolver* minisat);
};
Statistics d_statistics;
};
}
}
|
