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
111
112
113
114
115
116
|
/********************* */
/*! \file shared_solver.cpp
** \verbatim
** Top contributors (to current version):
** Andrew Reynolds
** This file is part of the CVC4 project.
** Copyright (c) 2009-2020 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 The shared solver base class
**/
#include "theory/shared_solver.h"
#include "expr/node_visitor.h"
#include "theory/theory_engine.h"
namespace CVC4 {
namespace theory {
// Always creates shared terms database. In all cases, shared terms
// database is used as a way of tracking which calls to Theory::addSharedTerm
// we need to make in preNotifySharedFact.
// In distributed equality engine management, shared terms database also
// maintains an equality engine. In central equality engine management,
// it does not.
SharedSolver::SharedSolver(TheoryEngine& te, ProofNodeManager* pnm)
: d_te(te),
d_logicInfo(te.getLogicInfo()),
d_sharedTerms(&d_te, d_te.getSatContext(), d_te.getUserContext(), pnm),
d_sharedTermsVisitor(d_sharedTerms)
{
}
bool SharedSolver::needsEqualityEngine(theory::EeSetupInfo& esi)
{
return false;
}
void SharedSolver::preRegisterShared(TNode t, bool multipleTheories)
{
// register it with the equality engine manager if sharing is enabled
if (d_logicInfo.isSharingEnabled())
{
preRegisterSharedInternal(t);
}
// if multiple theories are present in t
if (multipleTheories)
{
// Collect the shared terms if there are multiple theories
// This calls Theory::addSharedTerm, possibly multiple times
NodeVisitor<SharedTermsVisitor>::run(d_sharedTermsVisitor, t);
}
}
void SharedSolver::preNotifySharedFact(TNode atom)
{
if (d_sharedTerms.hasSharedTerms(atom))
{
// Always notify the theories of the shared terms, which is independent of
// the architecture currently.
SharedTermsDatabase::shared_terms_iterator it = d_sharedTerms.begin(atom);
SharedTermsDatabase::shared_terms_iterator it_end = d_sharedTerms.end(atom);
for (; it != it_end; ++it)
{
TNode term = *it;
TheoryIdSet theories = d_sharedTerms.getTheoriesToNotify(atom, term);
for (TheoryId id = THEORY_FIRST; id != THEORY_LAST; ++id)
{
if (TheoryIdSetUtil::setContains(id, theories))
{
Theory* t = d_te.theoryOf(id);
// call the add shared term method
t->addSharedTerm(term);
}
}
d_sharedTerms.markNotified(term, theories);
}
}
}
EqualityStatus SharedSolver::getEqualityStatus(TNode a, TNode b)
{
return EQUALITY_UNKNOWN;
}
void SharedSolver::sendLemma(TrustNode trn, TheoryId atomsTo)
{
d_te.lemma(trn, LemmaProperty::NONE, atomsTo);
}
bool SharedSolver::propagateSharedEquality(theory::TheoryId theory,
TNode a,
TNode b,
bool value)
{
// Propagate equality between shared terms to the one who asked for it
Node equality = a.eqNode(b);
if (value)
{
d_te.assertToTheory(equality, equality, theory, THEORY_BUILTIN);
}
else
{
d_te.assertToTheory(
equality.notNode(), equality.notNode(), theory, THEORY_BUILTIN);
}
return true;
}
bool SharedSolver::isShared(TNode t) const { return d_sharedTerms.isShared(t); }
} // namespace theory
} // namespace CVC4
|
