blob: 627125a27c6e18b67911cda47d5751c451f074cd (
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
|
/********************* */
/*! \file valuation.cpp
** \verbatim
** Original author: mdeters
** Major contributors: taking
** Minor contributors (to current version): barrett, dejan
** 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 A "valuation" proxy for TheoryEngine
**
** Implementation of Valuation class.
**/
#include "expr/node.h"
#include "theory/valuation.h"
#include "theory/theory_engine.h"
#include "theory/rewriter.h"
namespace CVC4 {
namespace theory {
bool equalityStatusCompatible(EqualityStatus s1, EqualityStatus s2) {
switch (s1) {
case EQUALITY_TRUE:
case EQUALITY_TRUE_IN_MODEL:
case EQUALITY_TRUE_AND_PROPAGATED:
switch (s2) {
case EQUALITY_TRUE:
case EQUALITY_TRUE_IN_MODEL:
case EQUALITY_TRUE_AND_PROPAGATED:
return true;
default:
return false;
}
break;
case EQUALITY_FALSE:
case EQUALITY_FALSE_IN_MODEL:
case EQUALITY_FALSE_AND_PROPAGATED:
switch (s2) {
case EQUALITY_FALSE:
case EQUALITY_FALSE_IN_MODEL:
case EQUALITY_FALSE_AND_PROPAGATED:
return true;
default:
return false;
}
break;
default:
return false;
}
}
Node Valuation::getValue(TNode n) const {
return d_engine->getValue(n);
}
bool Valuation::isSatLiteral(TNode n) const {
return d_engine->getPropEngine()->isSatLiteral(n);
}
Node Valuation::getSatValue(TNode n) const {
if(n.getKind() == kind::NOT) {
Node atomRes = d_engine->getPropEngine()->getValue(n[0]);
if(atomRes.getKind() == kind::CONST_BOOLEAN) {
return NodeManager::currentNM()->mkConst(!atomRes.getConst<bool>());
} else {
Assert(atomRes.isNull());
return atomRes;
}
} else {
return d_engine->getPropEngine()->getValue(n);
}
}
bool Valuation::hasSatValue(TNode n, bool& value) const {
Node normalized = Rewriter::rewrite(n);
if (d_engine->getPropEngine()->isSatLiteral(normalized)) {
return d_engine->getPropEngine()->hasValue(normalized, value);
} else {
return false;
}
}
EqualityStatus Valuation::getEqualityStatus(TNode a, TNode b) {
return d_engine->getEqualityStatus(a, b);
}
Node Valuation::ensureLiteral(TNode n) {
Debug("ensureLiteral") << "rewriting: " << n << std::endl;
Node rewritten = Rewriter::rewrite(n);
Debug("ensureLiteral") << " got: " << rewritten << std::endl;
Node preprocessed = d_engine->preprocess(rewritten);
Debug("ensureLiteral") << "preproced: " << preprocessed << std::endl;
d_engine->getPropEngine()->ensureLiteral(preprocessed);
return preprocessed;
}
}/* CVC4::theory namespace */
}/* CVC4 namespace */
|
