Package net.sf.tweety.logics.pl.sat
Class Sat4jSolver
- java.lang.Object
-
- net.sf.tweety.logics.pl.sat.SatSolver
-
- net.sf.tweety.logics.pl.sat.Sat4jSolver
-
- All Implemented Interfaces:
BeliefSetConsistencyTester<PlFormula>
,ConsistencyTester<BeliefSet<PlFormula,?>>
,ConsistencyWitnessProvider<PlBeliefSet,PlFormula>
public class Sat4jSolver extends SatSolver
Uses the Sat4j library for SAT solving (note that currently only the light version is used).- Author:
- Matthias Thimm
-
-
Constructor Summary
Constructors Constructor Description Sat4jSolver()
Creates a new solver with default parameters (maxvar=1000000, nbclauses=500000).Sat4jSolver(int maxvar, int nbclauses)
Creates a new solver with the given parameters.
-
Method Summary
Modifier and Type Method Description Interpretation<PlBeliefSet,PlFormula>
getWitness(java.util.Collection<PlFormula> formulas)
If the collection of formulas is consistent this method returns some model of it or, if it is inconsistent, null.boolean
isSatisfiable(java.util.Collection<PlFormula> formulas)
Checks whether the given set of formulas is satisfiable.-
Methods inherited from class net.sf.tweety.logics.pl.sat.SatSolver
convertToDimacs, convertToDimacs, getDefaultSolver, getWitness, getWitness, hasDefaultSolver, isConsistent, isConsistent, isConsistent, setDefaultSolver, setTempFolder
-
-
-
-
Constructor Detail
-
Sat4jSolver
public Sat4jSolver(int maxvar, int nbclauses)
Creates a new solver with the given parameters.- Parameters:
maxvar
- Max number of variables for this solver.nbclauses
- Max number of expected clauses for this solver.
-
Sat4jSolver
public Sat4jSolver()
Creates a new solver with default parameters (maxvar=1000000, nbclauses=500000).
-
-
Method Detail
-
isSatisfiable
public boolean isSatisfiable(java.util.Collection<PlFormula> formulas)
Description copied from class:SatSolver
Checks whether the given set of formulas is satisfiable.- Specified by:
isSatisfiable
in classSatSolver
- Parameters:
formulas
- a set of formulas.- Returns:
- "true" if the set is consistent.
-
getWitness
public Interpretation<PlBeliefSet,PlFormula> getWitness(java.util.Collection<PlFormula> formulas)
Description copied from class:SatSolver
If the collection of formulas is consistent this method returns some model of it or, if it is inconsistent, null.- Specified by:
getWitness
in interfaceConsistencyWitnessProvider<PlBeliefSet,PlFormula>
- Specified by:
getWitness
in classSatSolver
- Parameters:
formulas
- a set of formulas- Returns:
- some model of the formulas or null.
-
-