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98e884a740
This PRs updates java examples using the new Java API, by converting C++ examples to Java. Examples CVC4Streams.java and PipedInput.java are removed since they are not longer supported by the API. All examples are not included in the build which would be added in a future PR.
91 lines
2.9 KiB
Java
91 lines
2.9 KiB
Java
/******************************************************************************
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* Top contributors (to current version):
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* Aina Niemetz, Tianyi Liang, Mudathir Mohamed
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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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* A simple demonstration of reasoning about strings with cvc5 via C++ API.
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*/
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import static cvc5.Kind.*;
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import cvc5.*;
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public class Strings
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{
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public static void main(String args[]) throws CVC5ApiException
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{
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Solver slv = new Solver();
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// Set the logic
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slv.setLogic("QF_SLIA");
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// Produce models
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slv.setOption("produce-models", "true");
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// The option strings-exp is needed
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slv.setOption("strings-exp", "true");
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// Set output language to SMTLIB2
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slv.setOption("output-language", "smt2");
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// String type
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Sort string = slv.getStringSort();
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// std::string
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String str_ab = "ab";
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// String constants
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Term ab = slv.mkString(str_ab);
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Term abc = slv.mkString("abc");
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// String variables
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Term x = slv.mkConst(string, "x");
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Term y = slv.mkConst(string, "y");
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Term z = slv.mkConst(string, "z");
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// String concatenation: x.ab.y
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Term lhs = slv.mkTerm(STRING_CONCAT, x, ab, y);
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// String concatenation: abc.z
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Term rhs = slv.mkTerm(STRING_CONCAT, abc, z);
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// x.ab.y = abc.z
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Term formula1 = slv.mkTerm(EQUAL, lhs, rhs);
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// Length of y: |y|
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Term leny = slv.mkTerm(STRING_LENGTH, y);
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// |y| >= 0
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Term formula2 = slv.mkTerm(GEQ, leny, slv.mkInteger(0));
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// Regular expression: (ab[c-e]*f)|g|h
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Term r = slv.mkTerm(REGEXP_UNION,
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slv.mkTerm(REGEXP_CONCAT,
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slv.mkTerm(STRING_TO_REGEXP, slv.mkString("ab")),
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slv.mkTerm(REGEXP_STAR, slv.mkTerm(REGEXP_RANGE, slv.mkString("c"), slv.mkString("e"))),
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slv.mkTerm(STRING_TO_REGEXP, slv.mkString("f"))),
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slv.mkTerm(STRING_TO_REGEXP, slv.mkString("g")),
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slv.mkTerm(STRING_TO_REGEXP, slv.mkString("h")));
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// String variables
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Term s1 = slv.mkConst(string, "s1");
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Term s2 = slv.mkConst(string, "s2");
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// String concatenation: s1.s2
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Term s = slv.mkTerm(STRING_CONCAT, s1, s2);
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// s1.s2 in (ab[c-e]*f)|g|h
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Term formula3 = slv.mkTerm(STRING_IN_REGEXP, s, r);
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// Make a query
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Term q = slv.mkTerm(AND, formula1, formula2, formula3);
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// check sat
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Result result = slv.checkSatAssuming(q);
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System.out.println("cvc5 reports: " + q + " is " + result + ".");
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if (result.isSat())
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{
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System.out.println(" x = " + slv.getValue(x));
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System.out.println(" s1.s2 = " + slv.getValue(s));
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}
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}
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} |