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/******************************************************************************
* Top contributors (to current version):
* Mudathir Mohamed, Andres Noetzli, Daniel Larraz
*
* This file is part of the cvc5 project.
*
* Copyright (c) 2009-2025 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.
* ****************************************************************************
*
* An example of interacting with unsat cores using cvc5's Java API.
*/
import io.github.cvc5.*;
import java.util.Arrays;
public class UnsatCores
{
public static void main(String[] args) throws CVC5ApiException
{
TermManager tm = new TermManager();
Solver solver = new Solver(tm);
{
// Enable the production of unsat cores
solver.setOption("produce-unsat-cores", "true");
Sort boolSort = tm.getBooleanSort();
Term a = tm.mkConst(boolSort, "A");
Term b = tm.mkConst(boolSort, "B");
// A ^ B
solver.assertFormula(tm.mkTerm(Kind.AND, a, b));
// ~(A v B)
solver.assertFormula(tm.mkTerm(Kind.NOT, tm.mkTerm(Kind.OR, a, b)));
Result res = solver.checkSat(); // result is unsat
// Retrieve the unsat core
Term[] unsatCore = solver.getUnsatCore();
// Print the unsat core
System.out.println("Unsat Core: " + Arrays.asList(unsatCore));
// Iterate over expressions in the unsat core.
System.out.println("--- Unsat Core ---");
for (Term e : unsatCore)
{
System.out.println(e);
}
}
Context.deletePointers();
}
}
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