1 /*******************************************************************************
2 * SAT4J: a SATisfiability library for Java Copyright (C) 2004-2008 Daniel Le Berre
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 pseudo boolean algorithms described in:
20 * A fast pseudo-Boolean constraint solver Chai, D.; Kuehlmann, A.
21 * Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on
22 * Volume 24, Issue 3, March 2005 Page(s): 305 - 317
23 *
24 * and
25 * Heidi E. Dixon, 2004. Automating Pseudo-Boolean Inference within a DPLL
26 * Framework. Ph.D. Dissertation, University of Oregon.
27 *******************************************************************************/
28 package org.sat4j.pb.core;
29
30 import java.io.PrintWriter;
31
32 import org.sat4j.minisat.core.SolverStats;
33
34 public class PBSolverStats extends SolverStats {
35
36 /**
37 *
38 */
39 private static final long serialVersionUID = 1L;
40
41 public long numberOfReductions;
42
43 public long numberOfLearnedConstraintsReduced;
44
45 public long numberOfResolution;
46
47 public long numberOfCP;
48
49 @Override
50 public void reset() {
51 super.reset();
52 numberOfReductions = 0;
53 numberOfLearnedConstraintsReduced = 0;
54 numberOfResolution = 0;
55 numberOfCP = 0;
56 }
57
58 @Override
59 public void printStat(PrintWriter out, String prefix) {
60 super.printStat(out, prefix);
61 out.println(prefix
62 + "number of reductions to clauses (during analyze)\t: "
63 + numberOfReductions);
64 out.println(prefix
65 + "number of learned constraints concerned by reduction\t: "
66 + numberOfLearnedConstraintsReduced);
67 out.println(prefix + "number of learning phase by resolution\t: "
68 + numberOfResolution);
69 out.println(prefix + "number of learning phase by cutting planes\t: "
70 + numberOfCP);
71 }
72
73 }