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
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
/********************* */
/*! \file ouroborous.cpp
** \verbatim
** Top contributors (to current version):
** Morgan Deters, Aina Niemetz, Tim King
** 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 "Ouroborous" test: does CVC4 read its own output?
**
** The "Ouroborous" test, named after the serpent that swallows its
** own tail, ensures that CVC4 can parse some input, output it again
** (in any of its languages) and then parse it again. The result of
** the first parse must be equal to the result of the second parse;
** both strings and expressions are compared for equality.
**
** To add a new test, simply add a call to runTestString() under
** runTest(), below. If you don't specify an input language,
** LANG_SMTLIB_V2 is used. If your example depends on variables,
** you'll need to declare them in the "declarations" global, just
** below, in SMT-LIBv2 form (but they're good for all languages).
**/
#include <iostream>
#include <sstream>
#include <string>
#include "api/cvc4cpp.h"
#include "expr/expr.h"
#include "expr/expr_iomanip.h"
#include "options/set_language.h"
#include "parser/parser.h"
#include "parser/parser_builder.h"
#include "smt/command.h"
using namespace CVC4;
using namespace CVC4::parser;
using namespace CVC4::language;
using namespace std;
const string declarations = "\
(declare-sort U 0)\n\
(declare-fun f (U) U)\n\
(declare-fun x () U)\n\
(declare-fun y () U)\n\
(assert (= (f x) x))\n\
(declare-fun a () (Array U (Array U U)))\n\
";
Parser* psr = NULL;
int runTest();
int main() {
try {
return runTest();
} catch(Exception& e) {
cerr << e << endl;
} catch(...) {
cerr << "non-cvc4 exception thrown." << endl;
}
return 1;
}
string translate(string in, InputLanguage inlang, OutputLanguage outlang) {
cout << "==============================================" << endl
<< "translating from " << inlang << " to " << outlang << " this string:" << endl
<< in << endl;
psr->setInput(Input::newStringInput(inlang, in, "internal-buffer"));
Expr e = psr->nextExpression().getExpr();
stringstream ss;
ss << language::SetLanguage(outlang) << expr::ExprSetDepth(-1) << e;
assert(psr->nextExpression().isNull());// next expr should be null
assert(psr->done());// parser should be done
string s = ss.str();
cout << "got this:" << endl
<< s << endl
<< "reparsing as " << outlang << endl;
psr->setInput(Input::newStringInput(toInputLanguage(outlang), s, "internal-buffer"));
Expr f = psr->nextExpression().getExpr();
assert(e == f);
cout << "got same expressions " << e.getId() << " and " << f.getId() << endl
<< "==============================================" << endl;
return s;
}
void runTestString(std::string instr, InputLanguage instrlang = input::LANG_SMTLIB_V2) {
cout << endl
<< "starting with: " << instr << endl
<< " in language " << instrlang << endl;
string smt2 = translate(instr, instrlang, output::LANG_SMTLIB_V2);
cout << "in SMT2 : " << smt2 << endl;
/* -- SMT-LIBv1 doesn't have a functional printer yet
string smt1 = translate(smt2, input::LANG_SMTLIB_V2, output::LANG_SMTLIB);
cout << "in SMT1 : " << smt1 << endl;
*/
string cvc = translate(smt2, input::LANG_SMTLIB_V2, output::LANG_CVC4);
cout << "in CVC : " << cvc << endl;
string out = translate(cvc, input::LANG_CVC4, output::LANG_SMTLIB_V2);
cout << "back to SMT2 : " << out << endl << endl;
assert(out == smt2);// differences in output
}
int runTest() {
std::unique_ptr<api::Solver> solver =
std::unique_ptr<api::Solver>(new api::Solver());
psr = ParserBuilder(solver.get(), "internal-buffer")
.withStringInput(declarations)
.withInputLanguage(input::LANG_SMTLIB_V2)
.build();
// we don't need to execute them, but we DO need to parse them to
// get the declarations
while(Command* c = psr->nextCommand()) {
delete c;
}
assert(psr->done());// parser should be done
cout << expr::ExprSetDepth(-1);
runTestString("(= (f (f y)) x)");
runTestString("~BVPLUS(3, 0bin00, 0bin11)[2:1] = 0bin10", input::LANG_CVC4);
runTestString("~BVPLUS(3, BVMULT(2, 0bin01, 0bin11), 0bin11)[2:0]", input::LANG_CVC4);
runTestString("a[x][y] = a[y][x]", input::LANG_CVC4);
delete psr;
psr = NULL;
return 0;
}
|
