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1   /*
2    * SAT4J: a SATisfiability library for Java Copyright (C) 2004-2006 Daniel Le Berre
3    * 
4    * Based on the original minisat specification from:
5    * 
6    * An extensible SAT solver. Niklas E?n and Niklas S?rensson. Proceedings of the
7    * Sixth International Conference on Theory and Applications of Satisfiability
8    * Testing, LNCS 2919, pp 502-518, 2003.
9    * 
10   * This library is free software; you can redistribute it and/or modify it under
11   * the terms of the GNU Lesser General Public License as published by the Free
12   * Software Foundation; either version 2.1 of the License, or (at your option)
13   * any later version.
14   * 
15   * This library is distributed in the hope that it will be useful, but WITHOUT
16   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17   * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
18   * details.
19   * 
20   * You should have received a copy of the GNU Lesser General Public License
21   * along with this library; if not, write to the Free Software Foundation, Inc.,
22   * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23   * 
24   */
25  
26  package org.sat4j.minisat.learning;
27  
28  import org.sat4j.minisat.core.Constr;
29  import org.sat4j.minisat.core.ILits;
30  
31  /**
32   * Allows MiniSAT to do backjumping without learning. The literals appearing in
33   * the reason do not see their activity increased. That solution looks the best
34   * for VLIW-SAT-1.0 benchmarks (1346s vs 1785s).
35   * 
36   * @author leberre
37   */
38  public class NoLearningNoHeuristics<L extends ILits> extends AbstractLearning<L> {
39  
40      private static final long serialVersionUID = 1L;
41  
42      public void learns(Constr reason) {
43      }
44  
45  }