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1   /*******************************************************************************
2    * SAT4J: a SATisfiability library for Java Copyright (C) 2004, 2012 Artois University and CNRS
3    *
4    * All rights reserved. This program and the accompanying materials
5    * are made available under the terms of the Eclipse Public License v1.0
6    * which accompanies this distribution, and is available at
7    *  http://www.eclipse.org/legal/epl-v10.html
8    *
9    * Alternatively, the contents of this file may be used under the terms of
10   * either the GNU Lesser General Public License Version 2.1 or later (the
11   * "LGPL"), in which case the provisions of the LGPL are applicable instead
12   * of those above. If you wish to allow use of your version of this file only
13   * under the terms of the LGPL, and not to allow others to use your version of
14   * this file under the terms of the EPL, indicate your decision by deleting
15   * the provisions above and replace them with the notice and other provisions
16   * required by the LGPL. If you do not delete the provisions above, a recipient
17   * may use your version of this file under the terms of the EPL or the LGPL.
18   *
19   * Based on the original MiniSat specification from:
20   *
21   * An extensible SAT solver. Niklas Een and Niklas Sorensson. Proceedings of the
22   * Sixth International Conference on Theory and Applications of Satisfiability
23   * Testing, LNCS 2919, pp 502-518, 2003.
24   *
25   * See www.minisat.se for the original solver in C++.
26   *
27   * Contributors:
28   *   CRIL - initial API and implementation
29   *******************************************************************************/
30  package org.sat4j;
31  
32  import static org.junit.Assert.assertTrue;
33  
34  import java.io.FileNotFoundException;
35  import java.io.IOException;
36  
37  import org.junit.Before;
38  import org.junit.Test;
39  import org.sat4j.core.VecInt;
40  import org.sat4j.minisat.SolverFactory;
41  import org.sat4j.reader.DimacsReader;
42  import org.sat4j.reader.ParseFormatException;
43  import org.sat4j.reader.Reader;
44  import org.sat4j.specs.ContradictionException;
45  import org.sat4j.specs.IConstr;
46  import org.sat4j.specs.ISolver;
47  import org.sat4j.specs.TimeoutException;
48  import org.sat4j.tools.xplain.Xplain;
49  
50  public class BugSAT26 {
51      private Xplain<ISolver> xplain;
52  
53      @Before
54      public void setUp() throws FileNotFoundException, ParseFormatException,
55              IOException, ContradictionException {
56          this.xplain = new Xplain<ISolver>(SolverFactory.newDefault());
57          this.xplain.setTimeout(3600); // 1 hour timeout
58          Reader reader = new DimacsReader(this.xplain);
59          String dimacs = "src/test/testfiles/eb42.dimacs";
60          reader.parseInstance(dimacs);
61      }
62  
63      @Test
64      public void testConsecutiveCallToSolver() throws ContradictionException,
65              TimeoutException {
66          assertTrue(this.xplain.isSatisfiable());
67          int i = 0;
68          while (i < 5) {
69              VecInt assumption = new VecInt();
70              assumption.push(1187);
71              IConstr constr = this.xplain.addClause(assumption);
72              this.xplain.removeConstr(constr);
73              i++;
74          }
75      }
76  }