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.assertEquals; 33 import static org.junit.Assert.assertNull; 34 35 import org.junit.Test; 36 import org.sat4j.core.VecInt; 37 import org.sat4j.minisat.SolverFactory; 38 import org.sat4j.specs.ContradictionException; 39 import org.sat4j.specs.IConstr; 40 import org.sat4j.specs.ISolver; 41 import org.sat4j.specs.TimeoutException; 42 43 public class BugSAT37 { 44 45 @Test 46 public void testSolver() { 47 ISolver s = SolverFactory.newDefault(); 48 int resVars = s.newVar(6); 49 assertEquals(6, resVars); 50 try { 51 s.addClause(new VecInt(new int[] { -1, -3 })); 52 s.addClause(new VecInt(new int[] { -2, -4 })); 53 s.addClause(new VecInt(new int[] { 1 })); 54 s.addClause(new VecInt(new int[] { 3 })); 55 IConstr r = s.addAtMost(new VecInt(new int[] { 5, 6 }), 1); 56 int[] model = s.findModel(); 57 assertNull(model); 58 s.removeConstr(r); 59 model = s.findModel(); 60 assertNull(model); 61 } catch (ContradictionException e) { 62 return; 63 } catch (TimeoutException e) { 64 return; 65 } 66 } 67 68 }