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.pb; 31 32 import static org.junit.Assert.assertEquals; 33 import static org.junit.Assert.assertFalse; 34 import static org.junit.Assert.assertTrue; 35 36 import java.util.Collection; 37 38 import org.junit.Test; 39 import org.sat4j.AbstractXplainTest; 40 import org.sat4j.core.VecInt; 41 import org.sat4j.specs.ContradictionException; 42 import org.sat4j.specs.IConstr; 43 import org.sat4j.specs.IVecInt; 44 import org.sat4j.specs.TimeoutException; 45 46 public abstract class AbstractPBXplainTest extends 47 AbstractXplainTest<IPBSolver> { 48 49 @Test 50 public void testExactlyConstraint() throws ContradictionException, 51 TimeoutException { 52 this.solver.newVar(4); 53 IVecInt clause = new VecInt(); 54 clause.push(1).push(2).push(3).push(4); 55 IConstr c1 = this.solver.addExactly(clause, 1); 56 clause.clear(); 57 clause.push(-1).push(2); 58 this.solver.addClause(clause); 59 clause.clear(); 60 clause.push(-2).push(3); 61 this.solver.addClause(clause); 62 clause.clear(); 63 clause.push(-3).push(4); 64 this.solver.addClause(clause); 65 clause.clear(); 66 clause.push(-4).push(1); 67 this.solver.addClause(clause); 68 clause.clear(); 69 assertFalse(this.solver.isSatisfiable()); 70 Collection<IConstr> explanation = this.solver.explain(); 71 assertEquals(5, explanation.size()); 72 assertTrue(explanation.contains(c1)); 73 } 74 }