de.learnlib.eqtests.basic

Class CompleteExplorationEQOracle<I,D>

java.lang.Object

de.learnlib.eqtests.basic.CompleteExplorationEQOracle<I,D>

Type Parameters:

I - input symbol type

D - output domain type

All Implemented Interfaces:

EquivalenceOracle<DetOutputAutomaton<?,I,?,D>,I,D>

public class CompleteExplorationEQOracle<I,D>
extends Object
implements EquivalenceOracle<DetOutputAutomaton<?,I,?,D>,I,D>

Implements an equivalence check by complete exploration up to a given depth, i.e., by testing all possible sequences of a certain length within a specified range.

Author:

Malte Isberner

Nested Class Summary

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

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

Constructor Summary

Constructors

Constructor and Description
CompleteExplorationEQOracle(MembershipOracle<I,D> sulOracle, int maxDepth) Constructor.
CompleteExplorationEQOracle(MembershipOracle<I,D> sulOracle, int minDepth, int maxDepth) Constructor.

Method Summary

Modifier and Type	Method and Description
DefaultQuery<I,D>	findCounterExample(DetOutputAutomaton<?,I,?,D> hypothesis, Collection<? extends I> alphabet) 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

CompleteExplorationEQOracle

public CompleteExplorationEQOracle(MembershipOracle<I,D> sulOracle,
                                   int maxDepth)

Constructor.

Parameters:

sulOracle - interface to the system under learning

maxDepth - maximum exploration depth

CompleteExplorationEQOracle

public CompleteExplorationEQOracle(MembershipOracle<I,D> sulOracle,
                                   int minDepth,
                                   int maxDepth)

Constructor.

Parameters:

sulOracle - interface to the system under learning

minDepth - minimum exploration depth

maxDepth - maximum exploration depth

Method Detail

findCounterExample

public DefaultQuery<I,D> findCounterExample(DetOutputAutomaton<?,I,?,D> hypothesis,
                                            Collection<? extends I> alphabet)

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<DetOutputAutomaton<?,I,?,D>,I,D>

Parameters:

hypothesis - the conjecture

alphabet - 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.