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/****************************************************************************** |
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* Top contributors (to current version): |
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* Aina Niemetz, Morgan Deters |
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* |
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* This file is part of the cvc5 project. |
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* |
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* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS |
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* in the top-level source directory and their institutional affiliations. |
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* All rights reserved. See the file COPYING in the top-level source |
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* directory for licensing information. |
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* **************************************************************************** |
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* |
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* "Ouroborous" test: does cvc5 read its own output? |
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* |
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* The "Ouroborous" test, named after the serpent that swallows its |
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* own tail, ensures that cvc5 can parse some input, output it again |
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* (in any of its languages) and then parse it again. The result of |
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* the first parse must be equal to the result of the second parse; |
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* both strings and expressions are compared for equality. |
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* |
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* To add a new test, simply add a call to runTestString() under |
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* runTest(), below. If you don't specify an input language, |
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* LANG_SMTLIB_V2 is used. If your example depends on variables, |
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* you'll need to declare them in the "declarations" global, just |
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* below, in SMT-LIBv2 form (but they're good for all languages). |
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*/ |
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#include <cassert> |
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#include <iostream> |
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#include <string> |
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#include "api/cpp/cvc5.h" |
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#include "options/set_language.h" |
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#include "parser/parser.h" |
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#include "parser/parser_builder.h" |
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#include "smt/command.h" |
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using namespace cvc5; |
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using namespace cvc5::parser; |
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using namespace cvc5::language; |
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int runTest(); |
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int main() |
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{ |
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try |
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{ |
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return runTest(); |
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} |
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catch (api::CVC5ApiException& e) |
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{ |
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std::cerr << e.getMessage() << std::endl; |
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} |
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catch (parser::ParserException& e) |
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{ |
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std::cerr << e.getMessage() << std::endl; |
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} |
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catch (...) |
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{ |
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std::cerr << "non-cvc5 exception thrown" << std::endl; |
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} |
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return 1; |
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} |
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std::string parse(std::string instr, |
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std::string input_language, |
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std::string output_language) |
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{ |
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assert(input_language == "smt2" || input_language == "cvc"); |
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assert(output_language == "smt2" || output_language == "cvc"); |
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std::string declarations; |
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if (input_language == "smt2") |
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{ |
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declarations = |
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"\ |
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(declare-sort U 0)\n\ |
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(declare-fun f (U) U)\n\ |
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(declare-fun x () U)\n\ |
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(declare-fun y () U)\n\ |
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(assert (= (f x) x))\n\ |
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(declare-fun a () (Array U (Array U U)))\n\ |
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"; |
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} |
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else |
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{ |
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declarations = |
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"\ |
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U: TYPE;\n\ |
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f: U -> U;\n\ |
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x,y: U;\n\ |
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a: ARRAY U OF (ARRAY U OF U);\n\ |
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ASSERT f(x) = x;\n\ |
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"; |
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} |
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api::Solver solver; |
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InputLanguage ilang = |
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input_language == "smt2" ? input::LANG_SMTLIB_V2 : input::LANG_CVC; |
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solver.setOption("input-language", input_language); |
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solver.setOption("output-language", output_language); |
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SymbolManager symman(&solver); |
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std::unique_ptr<Parser> parser( |
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ParserBuilder(&solver, &symman).withInputLanguage(ilang).build()); |
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parser->setInput( |
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Input::newStringInput(ilang, declarations, "internal-buffer")); |
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// we don't need to execute the commands, but we DO need to parse them to |
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// get the declarations |
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while (Command* c = parser->nextCommand()) |
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{ |
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delete c; |
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} |
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assert(parser->done()); // parser should be done |
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parser->setInput(Input::newStringInput(ilang, instr, "internal-buffer")); |
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api::Term e = parser->nextExpression(); |
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std::string s = e.toString(); |
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assert(parser->nextExpression().isNull()); // next expr should be null |
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return s; |
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} |
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std::string translate(std::string instr, |
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std::string input_language, |
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std::string output_language) |
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{ |
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assert(input_language == "smt2" || input_language == "cvc"); |
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assert(output_language == "smt2" || output_language == "cvc"); |
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std::cout << "==============================================" << std::endl |
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<< "translating from " |
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<< (input_language == "smt2" ? input::LANG_SMTLIB_V2 |
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: input::LANG_CVC) |
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<< " to " |
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<< (output_language == "smt2" ? output::LANG_SMTLIB_V2 |
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: output::LANG_CVC) |
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<< " this string:" << std::endl |
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<< instr << std::endl; |
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std::string outstr = parse(instr, input_language, output_language); |
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std::cout << "got this:" << std::endl |
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<< outstr << std::endl |
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<< "reparsing as " |
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<< (output_language == "smt2" ? input::LANG_SMTLIB_V2 |
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: input::LANG_CVC) |
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<< std::endl; |
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std::string poutstr = parse(outstr, output_language, output_language); |
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assert(outstr == poutstr); |
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std::cout << "got same expressions " << outstr << " and " << poutstr |
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<< std::endl |
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<< "==============================================" << std::endl; |
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return outstr; |
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} |
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void runTestString(std::string instr, std::string instr_language) |
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{ |
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std::cout << std::endl |
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<< "starting with: " << instr << std::endl |
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<< " in language " << input::LANG_SMTLIB_V2 << std::endl; |
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std::string smt2str = translate(instr, instr_language, "smt2"); |
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std::cout << "in SMT2 : " << smt2str << std::endl; |
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std::string cvcstr = translate(smt2str, "smt2", "cvc"); |
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std::cout << "in CVC : " << cvcstr << std::endl; |
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std::string outstr = translate(cvcstr, "cvc", "smt2"); |
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std::cout << "back to SMT2 : " << outstr << std::endl << std::endl; |
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assert(outstr == smt2str); // differences in output |
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} |
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int32_t runTest() |
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{ |
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runTestString("(= (f (f y)) x)", "smt2"); |
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runTestString("~BVPLUS(3, 0bin00, 0bin11)[2:1] = 0bin10", "cvc"); |
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runTestString("~BVPLUS(3, BVMULT(2, 0bin01, 0bin11), 0bin11)[2:0]", "cvc"); |
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runTestString("a[x][y] = a[y][x]", "cvc"); |
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return 0; |
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} |