de.learnlib.oracle.equivalence.vpda

Class SimulatorEQOracle<I>

java.lang.Object

de.learnlib.oracle.equivalence.vpda.SimulatorEQOracle<I>

All Implemented Interfaces:

EquivalenceOracle<OneSEVPA<?,I>,I,Boolean>

public class SimulatorEQOracle<I>
extends Object
implements EquivalenceOracle<OneSEVPA<?,I>,I,Boolean>

An equivalence oracle based on the computation of a separating word for a given hypothesis and a previously known target system.

Author:

frohme

Nested Class Summary

Nested classes/interfaces inherited from interface de.learnlib.api.oracle.EquivalenceOracle

EquivalenceOracle.DFAEquivalenceOracle<I>, EquivalenceOracle.MealyEquivalenceOracle<I,O>

Constructor Summary

Constructors

Constructor and Description
SimulatorEQOracle(OneSEVPA<?,I> reference, VPDAlphabet<I> alphabet)

Method Summary

Modifier and Type	Method and Description
@Nullable DefaultQuery<I,Boolean>	findCounterExample(OneSEVPA<?,I> hypothesis, Collection<? extends I> inputs) Searches for a counterexample disproving the subjected hypothesis.

Methods inherited from class java.lang.Object

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

Constructor Detail

SimulatorEQOracle

public SimulatorEQOracle(OneSEVPA<?,I> reference,
                         VPDAlphabet<I> alphabet)

Method Detail

findCounterExample

public @Nullable DefaultQuery<I,Boolean> findCounterExample(OneSEVPA<?,I> hypothesis,
                                                            Collection<? extends I> inputs)

Description copied from interface: EquivalenceOracle

Searches for a counterexample disproving the subjected hypothesis. A counterexample is query which, when performed on the SUL, yields a different output than what was predicted by the hypothesis. If no counterexample could be found (this does not necessarily mean that none exists), null is returned.

Specified by:

findCounterExample in interface EquivalenceOracle<OneSEVPA<?,I>,I,Boolean>

Parameters:

hypothesis - the conjecture

inputs - the set of inputs to consider, this should be a subset of the input alphabet of the provided hypothesis

Returns:

a query exposing different behavior, or null if no counterexample could be found. In case a non-null value is returned, the output field in the DefaultQuery contains the SUL output for the respective query.