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.tools;
31
32 import java.io.FileNotFoundException;
33 import java.io.FileOutputStream;
34 import java.io.PrintStream;
35
36 import org.sat4j.pb.constraints.pb.PBConstr;
37 import org.sat4j.specs.IConstr;
38 import org.sat4j.specs.ISolverService;
39 import org.sat4j.tools.SearchListenerAdapter;
40
41 public class ConflictTracing extends SearchListenerAdapter<ISolverService> {
42
43 private static final long serialVersionUID = 1L;
44
45 private final String filename;
46 private PrintStream out;
47 private long index = 1;
48
49 public ConflictTracing(String filename) {
50 this.filename = filename;
51 updateWriter();
52 }
53
54 private void updateWriter() {
55 try {
56 this.out = new PrintStream(new FileOutputStream(this.filename
57 + ".dat"));
58 } catch (FileNotFoundException e) {
59 this.out = System.out;
60 }
61 }
62
63 @Override
64 public void learn(IConstr c) {
65 PBConstr myConstr = (PBConstr) c;
66 if (myConstr.size() > 0) {
67 this.out.printf("%d %d %d\n", this.index++, myConstr.getCoef(0),
68 myConstr.size());
69 }
70 }
71 }