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
|
/********************* */
/*! \file shared_solver_distributed.cpp
** \verbatim
** Top contributors (to current version):
** Andrew Reynolds
** This file is part of the CVC4 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.\endverbatim
**
** \brief Shared solver in the distributed architecture
**/
#include "theory/shared_solver_distributed.h"
#include "theory/theory_engine.h"
namespace cvc5 {
namespace theory {
SharedSolverDistributed::SharedSolverDistributed(TheoryEngine& te,
ProofNodeManager* pnm)
: SharedSolver(te, pnm)
{
}
bool SharedSolverDistributed::needsEqualityEngine(theory::EeSetupInfo& esi)
{
return d_sharedTerms.needsEqualityEngine(esi);
}
void SharedSolverDistributed::setEqualityEngine(eq::EqualityEngine* ee)
{
d_sharedTerms.setEqualityEngine(ee);
}
void SharedSolverDistributed::preRegisterSharedInternal(TNode t)
{
if (t.getKind() == kind::EQUAL)
{
// When sharing is enabled, we propagate from the shared terms manager also
d_sharedTerms.addEqualityToPropagate(t);
}
}
EqualityStatus SharedSolverDistributed::getEqualityStatus(TNode a, TNode b)
{
// if we're using a shared terms database, ask its status if a and b are
// shared.
if (d_sharedTerms.isShared(a) && d_sharedTerms.isShared(b))
{
if (d_sharedTerms.areEqual(a, b))
{
return EQUALITY_TRUE_AND_PROPAGATED;
}
else if (d_sharedTerms.areDisequal(a, b))
{
return EQUALITY_FALSE_AND_PROPAGATED;
}
}
// otherwise, ask the theory
return d_te.theoryOf(Theory::theoryOf(a.getType()))->getEqualityStatus(a, b);
}
TrustNode SharedSolverDistributed::explain(TNode literal, TheoryId id)
{
TrustNode texp;
if (id == THEORY_BUILTIN)
{
// explanation using the shared terms database
texp = d_sharedTerms.explain(literal);
Trace("shared-solver")
<< "\tTerm was propagated by THEORY_BUILTIN. Explanation: "
<< texp.getNode() << std::endl;
}
else
{
// By default, we ask the individual theory for the explanation.
// It is possible that a centralized approach could preempt this.
texp = d_te.theoryOf(id)->explain(literal);
Trace("shared-solver") << "\tTerm was propagated by owner theory: " << id
<< ". Explanation: " << texp.getNode() << std::endl;
}
return texp;
}
void SharedSolverDistributed::assertSharedEquality(TNode equality,
bool polarity,
TNode reason)
{
d_sharedTerms.assertEquality(equality, polarity, reason);
}
} // namespace theory
} // namespace cvc5
|
