1 |
|
/****************************************************************************** |
2 |
|
* Top contributors (to current version): |
3 |
|
* Andrew Reynolds, Mathias Preiner |
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 |
|
* A theory state for Theory. |
14 |
|
*/ |
15 |
|
|
16 |
|
#include "theory/theory_state.h" |
17 |
|
|
18 |
|
#include "theory/uf/equality_engine.h" |
19 |
|
|
20 |
|
namespace cvc5 { |
21 |
|
namespace theory { |
22 |
|
|
23 |
119190 |
TheoryState::TheoryState(Env& env, Valuation val) |
24 |
119190 |
: EnvObj(env), d_valuation(val), d_ee(nullptr), d_conflict(context(), false) |
25 |
|
{ |
26 |
119190 |
} |
27 |
|
|
28 |
119148 |
void TheoryState::setEqualityEngine(eq::EqualityEngine* ee) { d_ee = ee; } |
29 |
|
|
30 |
222455 |
context::Context* TheoryState::getSatContext() const { return context(); } |
31 |
|
|
32 |
290817 |
context::UserContext* TheoryState::getUserContext() const |
33 |
|
{ |
34 |
290817 |
return userContext(); |
35 |
|
} |
36 |
|
|
37 |
29050346 |
bool TheoryState::hasTerm(TNode a) const |
38 |
|
{ |
39 |
29050346 |
Assert(d_ee != nullptr); |
40 |
29050346 |
return d_ee->hasTerm(a); |
41 |
|
} |
42 |
|
|
43 |
15025658 |
TNode TheoryState::getRepresentative(TNode t) const |
44 |
|
{ |
45 |
15025658 |
Assert(d_ee != nullptr); |
46 |
15025658 |
if (d_ee->hasTerm(t)) |
47 |
|
{ |
48 |
14867876 |
return d_ee->getRepresentative(t); |
49 |
|
} |
50 |
157782 |
return t; |
51 |
|
} |
52 |
|
|
53 |
9633038 |
bool TheoryState::areEqual(TNode a, TNode b) const |
54 |
|
{ |
55 |
9633038 |
Assert(d_ee != nullptr); |
56 |
9633038 |
if (a == b) |
57 |
|
{ |
58 |
2469150 |
return true; |
59 |
|
} |
60 |
7163888 |
else if (hasTerm(a) && hasTerm(b)) |
61 |
|
{ |
62 |
7123871 |
return d_ee->areEqual(a, b); |
63 |
|
} |
64 |
40017 |
return false; |
65 |
|
} |
66 |
|
|
67 |
555158 |
bool TheoryState::areDisequal(TNode a, TNode b) const |
68 |
|
{ |
69 |
555158 |
Assert(d_ee != nullptr); |
70 |
555158 |
if (a == b) |
71 |
|
{ |
72 |
238012 |
return false; |
73 |
|
} |
74 |
|
|
75 |
317146 |
bool isConst = true; |
76 |
317146 |
bool hasTerms = true; |
77 |
317146 |
if (hasTerm(a)) |
78 |
|
{ |
79 |
316583 |
a = d_ee->getRepresentative(a); |
80 |
316583 |
isConst = a.isConst(); |
81 |
|
} |
82 |
563 |
else if (!a.isConst()) |
83 |
|
{ |
84 |
|
// if not constant and not a term in the ee, it cannot be disequal |
85 |
321 |
return false; |
86 |
|
} |
87 |
|
else |
88 |
|
{ |
89 |
242 |
hasTerms = false; |
90 |
|
} |
91 |
|
|
92 |
316825 |
if (hasTerm(b)) |
93 |
|
{ |
94 |
316433 |
b = d_ee->getRepresentative(b); |
95 |
316433 |
isConst = isConst && b.isConst(); |
96 |
|
} |
97 |
392 |
else if (!b.isConst()) |
98 |
|
{ |
99 |
|
// same as above, it cannot be disequal |
100 |
57 |
return false; |
101 |
|
} |
102 |
|
else |
103 |
|
{ |
104 |
335 |
hasTerms = false; |
105 |
|
} |
106 |
|
|
107 |
316768 |
if (isConst) |
108 |
|
{ |
109 |
|
// distinct constants are disequal |
110 |
60333 |
return a != b; |
111 |
|
} |
112 |
256435 |
else if (!hasTerms) |
113 |
|
{ |
114 |
339 |
return false; |
115 |
|
} |
116 |
|
// otherwise there may be an explicit disequality in the equality engine |
117 |
256096 |
return d_ee->areDisequal(a, b, false); |
118 |
|
} |
119 |
|
|
120 |
8297 |
void TheoryState::getEquivalenceClass(Node a, std::vector<Node>& eqc) const |
121 |
|
{ |
122 |
8297 |
if (d_ee->hasTerm(a)) |
123 |
|
{ |
124 |
15072 |
Node rep = d_ee->getRepresentative(a); |
125 |
7536 |
eq::EqClassIterator eqc_iter(rep, d_ee); |
126 |
121350 |
while (!eqc_iter.isFinished()) |
127 |
|
{ |
128 |
56907 |
eqc.push_back(*eqc_iter); |
129 |
56907 |
eqc_iter++; |
130 |
|
} |
131 |
|
} |
132 |
|
else |
133 |
|
{ |
134 |
761 |
eqc.push_back(a); |
135 |
|
} |
136 |
|
// a should be in its equivalence class |
137 |
8297 |
Assert(std::find(eqc.begin(), eqc.end(), a) != eqc.end()); |
138 |
8297 |
} |
139 |
|
|
140 |
7208499 |
eq::EqualityEngine* TheoryState::getEqualityEngine() const { return d_ee; } |
141 |
|
|
142 |
2469666 |
void TheoryState::notifyInConflict() { d_conflict = true; } |
143 |
|
|
144 |
46937801 |
bool TheoryState::isInConflict() const { return d_conflict; } |
145 |
|
|
146 |
|
bool TheoryState::isSatLiteral(TNode lit) const |
147 |
|
{ |
148 |
|
return d_valuation.isSatLiteral(lit); |
149 |
|
} |
150 |
|
|
151 |
6958413 |
TheoryModel* TheoryState::getModel() { return d_valuation.getModel(); } |
152 |
|
|
153 |
5149 |
SortInference* TheoryState::getSortInference() |
154 |
|
{ |
155 |
5149 |
return d_valuation.getSortInference(); |
156 |
|
} |
157 |
|
|
158 |
42519 |
bool TheoryState::hasSatValue(TNode n, bool& value) const |
159 |
|
{ |
160 |
42519 |
return d_valuation.hasSatValue(n, value); |
161 |
|
} |
162 |
|
|
163 |
7572 |
context::CDList<Assertion>::const_iterator TheoryState::factsBegin(TheoryId tid) |
164 |
|
{ |
165 |
7572 |
return d_valuation.factsBegin(tid); |
166 |
|
} |
167 |
7572 |
context::CDList<Assertion>::const_iterator TheoryState::factsEnd(TheoryId tid) |
168 |
|
{ |
169 |
7572 |
return d_valuation.factsEnd(tid); |
170 |
|
} |
171 |
|
|
172 |
11372 |
bool TheoryState::isFiniteType(TypeNode tn) const |
173 |
|
{ |
174 |
11372 |
return d_valuation.isFiniteType(tn); |
175 |
|
} |
176 |
|
|
177 |
1346589 |
Valuation& TheoryState::getValuation() { return d_valuation; } |
178 |
|
|
179 |
|
} // namespace theory |
180 |
29508 |
} // namespace cvc5 |