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 |
|
* sygus_enumerator |
14 |
|
*/ |
15 |
|
|
16 |
|
#include "theory/quantifiers/sygus/sygus_enumerator_callback.h" |
17 |
|
|
18 |
|
#include "theory/datatypes/sygus_datatype_utils.h" |
19 |
|
#include "theory/quantifiers/sygus/example_eval_cache.h" |
20 |
|
#include "theory/quantifiers/sygus/sygus_stats.h" |
21 |
|
#include "theory/quantifiers/sygus_sampler.h" |
22 |
|
|
23 |
|
namespace cvc5 { |
24 |
|
namespace theory { |
25 |
|
namespace quantifiers { |
26 |
|
|
27 |
166 |
SygusEnumeratorCallback::SygusEnumeratorCallback(Node e, SygusStatistics* s) |
28 |
166 |
: d_enum(e), d_stats(s) |
29 |
|
{ |
30 |
166 |
d_tn = e.getType(); |
31 |
166 |
} |
32 |
|
|
33 |
55281 |
bool SygusEnumeratorCallback::addTerm(Node n, std::unordered_set<Node>& bterms) |
34 |
|
{ |
35 |
110562 |
Node bn = datatypes::utils::sygusToBuiltin(n); |
36 |
110562 |
Node bnr = d_extr.extendedRewrite(bn); |
37 |
55281 |
if (d_stats != nullptr) |
38 |
|
{ |
39 |
55281 |
++(d_stats->d_enumTermsRewrite); |
40 |
|
} |
41 |
|
// call the solver-specific notify term |
42 |
55281 |
notifyTermInternal(n, bn, bnr); |
43 |
|
// check whether we should keep the term, which is based on the callback, |
44 |
|
// and the builtin terms |
45 |
|
// First, must be unique up to rewriting |
46 |
55281 |
if (bterms.find(bnr) != bterms.end()) |
47 |
|
{ |
48 |
22955 |
Trace("sygus-enum-exc") << "Exclude: " << bn << std::endl; |
49 |
22955 |
return false; |
50 |
|
} |
51 |
|
// insert to builtin term cache, regardless of whether it is redundant |
52 |
|
// based on the callback |
53 |
32326 |
bterms.insert(bnr); |
54 |
|
// callback-specific add term |
55 |
32326 |
if (!addTermInternal(n, bn, bnr)) |
56 |
|
{ |
57 |
16956 |
Trace("sygus-enum-exc") |
58 |
8478 |
<< "Exclude: " << bn << " due to callback" << std::endl; |
59 |
8478 |
return false; |
60 |
|
} |
61 |
23848 |
Trace("sygus-enum-terms") << "tc(" << d_tn << "): term " << bn << std::endl; |
62 |
23848 |
return true; |
63 |
|
} |
64 |
|
|
65 |
166 |
SygusEnumeratorCallbackDefault::SygusEnumeratorCallbackDefault( |
66 |
|
Node e, |
67 |
|
SygusStatistics* s, |
68 |
|
ExampleEvalCache* eec, |
69 |
|
SygusSampler* ssrv, |
70 |
166 |
std::ostream* out) |
71 |
166 |
: SygusEnumeratorCallback(e, s), d_eec(eec), d_samplerRrV(ssrv), d_out(out) |
72 |
|
{ |
73 |
166 |
} |
74 |
55281 |
void SygusEnumeratorCallbackDefault::notifyTermInternal(Node n, |
75 |
|
Node bn, |
76 |
|
Node bnr) |
77 |
|
{ |
78 |
55281 |
if (d_samplerRrV != nullptr) |
79 |
|
{ |
80 |
1626 |
Assert(d_out != nullptr); |
81 |
1626 |
d_samplerRrV->checkEquivalent(bn, bnr, *d_out); |
82 |
|
} |
83 |
55281 |
} |
84 |
|
|
85 |
32326 |
bool SygusEnumeratorCallbackDefault::addTermInternal(Node n, Node bn, Node bnr) |
86 |
|
{ |
87 |
|
// if we are doing PBE symmetry breaking |
88 |
32326 |
if (d_eec != nullptr) |
89 |
|
{ |
90 |
14013 |
if (d_stats != nullptr) |
91 |
|
{ |
92 |
14013 |
++(d_stats->d_enumTermsExampleEval); |
93 |
|
} |
94 |
|
// Is it equivalent under examples? |
95 |
19548 |
Node bne = d_eec->addSearchVal(d_tn, bnr); |
96 |
14013 |
if (!bne.isNull()) |
97 |
|
{ |
98 |
14013 |
if (bnr != bne) |
99 |
|
{ |
100 |
16956 |
Trace("sygus-enum-exc") |
101 |
8478 |
<< "Exclude (by examples): " << bn << ", since we already have " |
102 |
8478 |
<< bne << std::endl; |
103 |
8478 |
return false; |
104 |
|
} |
105 |
|
} |
106 |
|
} |
107 |
23848 |
return true; |
108 |
|
} |
109 |
|
|
110 |
|
} // namespace quantifiers |
111 |
|
} // namespace theory |
112 |
29502 |
} // namespace cvc5 |