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/******************************************************************************
* Top contributors (to current version):
* Aina Niemetz, Mathias Preiner, Morgan Deters
*
* This file is part of the cvc5 project.
*
* Copyright (c) 2009-2023 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.
* ****************************************************************************
*
* "Ouroborous" test: does cvc5 read its own output?
*
* The "Ouroborous" test, named after the serpent that swallows its
* own tail, ensures that cvc5 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 <cvc5/cvc5.h>
#include <cvc5/cvc5_parser.h>
#include <cassert>
#include <iostream>
#include <string>
using namespace cvc5;
using namespace cvc5::internal;
using namespace cvc5::parser;
int runTest();
int main()
{
try
{
return runTest();
}
catch (cvc5::CVC5ApiException& e)
{
std::cerr << e.getMessage() << std::endl;
}
catch (...)
{
std::cerr << "non-cvc5 exception thrown" << std::endl;
}
return 1;
}
std::string parse(std::string instr,
std::string input_language,
std::string output_language)
{
assert(input_language == "smt2");
assert(output_language == "smt2");
std::string declarations;
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\
";
cvc5::Solver solver;
modes::InputLanguage ilang = modes::InputLanguage::SMT_LIB_2_6;
solver.setOption("input-language", input_language);
solver.setOption("output-language", output_language);
SymbolManager symman(&solver);
InputParser parser(&solver, &symman);
std::stringstream ss;
ss << declarations;
parser.setStreamInput(ilang, ss, "internal-buffer");
// we don't need to execute the commands, but we DO need to parse them to
// get the declarations
std::stringstream tmp;
Command c;
while (true)
{
c = parser.nextCommand();
if (c.isNull())
{
break;
}
// invoke the command, which may bind symbols
c.invoke(&solver, &symman, tmp);
}
assert(parser.done()); // parser should be done
std::stringstream ssi;
ssi << instr;
parser.setStreamInput(ilang, ss, "internal-buffer");
cvc5::Term e = parser.nextTerm();
std::string s = e.toString();
assert(parser.nextTerm().isNull()); // next expr should be null
return s;
}
std::string translate(std::string instr,
std::string input_language,
std::string output_language)
{
assert(input_language == "smt2");
assert(output_language == "smt2");
std::cout << "==============================================" << std::endl
<< "translating from " << input_language << " to "
<< output_language << " this string:" << std::endl
<< instr << std::endl;
std::string outstr = parse(instr, input_language, output_language);
std::cout << "got this:" << std::endl
<< outstr << std::endl
<< "reparsing as " << output_language << std::endl;
std::string poutstr = parse(outstr, output_language, output_language);
assert(outstr == poutstr);
std::cout << "got same expressions " << outstr << " and " << poutstr
<< std::endl
<< "==============================================" << std::endl;
return outstr;
}
void runTestString(std::string instr, std::string instr_language)
{
std::cout << std::endl
<< "starting with: " << instr << std::endl
<< " in language " << instr_language << std::endl;
std::string smt2str = translate(instr, instr_language, "smt2");
std::cout << "in SMT2 : " << smt2str << std::endl;
std::string outstr = translate(smt2str, "smt2", "smt2");
std::cout << "to SMT2 : " << outstr << std::endl << std::endl;
assert(outstr == smt2str); // differences in output
}
int32_t runTest()
{
runTestString("(= (f (f y)) x)", "smt2");
runTestString("(= ((_ extract 2 1) (bvnot (bvadd #b000 #b011))) #b10)",
"smt2");
runTestString("((_ extract 2 0) (bvnot (bvadd (bvmul #b001 #b011) #b011)))",
"smt2");
return 0;
}
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