org.sat4j.tools.encoding
Class Binary

java.lang.Object
  org.sat4j.tools.encoding.EncodingStrategyAdapter
      org.sat4j.tools.encoding.Binary

public class Binary
extends EncodingStrategyAdapter

For the case "at most one", we can use the binary encoding (also called birwise encoding) first described in A. M. Frisch, T. J. Peugniez, A. J. Dogget and P. Nightingale, "Solving Non-Boolean Satisfiability Problems With Stochastic Local Search: A Comparison of Encodings" in Journal of Automated Reasoning, vol. 35, n� 1-3, 2005

Since:

2.3.1

Author:

sroussel

Constructor Summary

Binary()

Method Summary

IConstr	addAtMost(ISolver solver, IVecInt literals, int degree)
IConstr	addAtMostOne(ISolver solver, IVecInt literals) p being the smaller integer greater than log_2(n), this encoding adds p variables and n*p clauses.

Methods inherited from class org.sat4j.tools.encoding.EncodingStrategyAdapter

addAtLeast, addAtLeastOne, addExactly, addExactlyOne, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Binary

public Binary()

Method Detail

addAtMostOne

public IConstr addAtMostOne(ISolver solver,
                            IVecInt literals)
                     throws ContradictionException

p being the smaller integer greater than log_2(n), this encoding adds p variables and n*p clauses.

Overrides:

addAtMostOne in class EncodingStrategyAdapter

Throws:

ContradictionException

addAtMost

public IConstr addAtMost(ISolver solver,
                         IVecInt literals,
                         int degree)
                  throws ContradictionException

Overrides:

addAtMost in class EncodingStrategyAdapter

Throws:

ContradictionException