mirror of
https://github.com/AdaCore/cvc5.git
synced 2026-02-12 12:32:16 -08:00
96 lines
2.8 KiB
C++
96 lines
2.8 KiB
C++
/******************************************************************************
|
|
* Top contributors (to current version):
|
|
* Tianyi Liang, Aina Niemetz, Mathias Preiner
|
|
*
|
|
* This file is part of the cvc5 project.
|
|
*
|
|
* Copyright (c) 2009-2022 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.
|
|
* ****************************************************************************
|
|
*
|
|
* A simple demonstration of reasoning about strings with cvc5 via C++ API.
|
|
*/
|
|
|
|
#include <cvc5/cvc5.h>
|
|
|
|
#include <iostream>
|
|
|
|
using namespace cvc5;
|
|
|
|
int main()
|
|
{
|
|
Solver slv;
|
|
|
|
// Set the logic
|
|
slv.setLogic("QF_SLIA");
|
|
// Produce models
|
|
slv.setOption("produce-models", "true");
|
|
// The option strings-exp is needed
|
|
slv.setOption("strings-exp", "true");
|
|
// Set output language to SMTLIB2
|
|
slv.setOption("output-language", "smt2");
|
|
|
|
// String type
|
|
Sort string = slv.getStringSort();
|
|
|
|
// std::string
|
|
std::string str_ab("ab");
|
|
// String constants
|
|
Term ab = slv.mkString(str_ab);
|
|
Term abc = slv.mkString("abc");
|
|
// String variables
|
|
Term x = slv.mkConst(string, "x");
|
|
Term y = slv.mkConst(string, "y");
|
|
Term z = slv.mkConst(string, "z");
|
|
|
|
// String concatenation: x.ab.y
|
|
Term lhs = slv.mkTerm(STRING_CONCAT, {x, ab, y});
|
|
// String concatenation: abc.z
|
|
Term rhs = slv.mkTerm(STRING_CONCAT, {abc, z});
|
|
// x.ab.y = abc.z
|
|
Term formula1 = slv.mkTerm(EQUAL, {lhs, rhs});
|
|
|
|
// Length of y: |y|
|
|
Term leny = slv.mkTerm(STRING_LENGTH, {y});
|
|
// |y| >= 0
|
|
Term formula2 = slv.mkTerm(GEQ, {leny, slv.mkInteger(0)});
|
|
|
|
// Regular expression: (ab[c-e]*f)|g|h
|
|
Term r = slv.mkTerm(
|
|
REGEXP_UNION,
|
|
|
|
{slv.mkTerm(
|
|
REGEXP_CONCAT,
|
|
{slv.mkTerm(STRING_TO_REGEXP, {slv.mkString("ab")}),
|
|
slv.mkTerm(REGEXP_STAR,
|
|
{slv.mkTerm(REGEXP_RANGE,
|
|
{slv.mkString("c"), slv.mkString("e")})}),
|
|
slv.mkTerm(STRING_TO_REGEXP, {slv.mkString("f")})}),
|
|
slv.mkTerm(STRING_TO_REGEXP, {slv.mkString("g")}),
|
|
slv.mkTerm(STRING_TO_REGEXP, {slv.mkString("h")})});
|
|
|
|
// String variables
|
|
Term s1 = slv.mkConst(string, "s1");
|
|
Term s2 = slv.mkConst(string, "s2");
|
|
// String concatenation: s1.s2
|
|
Term s = slv.mkTerm(STRING_CONCAT, {s1, s2});
|
|
|
|
// s1.s2 in (ab[c-e]*f)|g|h
|
|
Term formula3 = slv.mkTerm(STRING_IN_REGEXP, {s, r});
|
|
|
|
// Make a query
|
|
Term q = slv.mkTerm(AND, {formula1, formula2, formula3});
|
|
|
|
// check sat
|
|
Result result = slv.checkSatAssuming(q);
|
|
std::cout << "cvc5 reports: " << q << " is " << result << "." << std::endl;
|
|
|
|
if(result.isSat())
|
|
{
|
|
std::cout << " x = " << slv.getValue(x) << std::endl;
|
|
std::cout << " s1.s2 = " << slv.getValue(s) << std::endl;
|
|
}
|
|
}
|