de.learnlib.cache.dfa

Class DFACacheConsistencyTest<I>

java.lang.Object

de.learnlib.cache.dfa.DFACacheConsistencyTest<I>

Type Parameters:

I - input symbol class

All Implemented Interfaces:

EquivalenceOracle<DFA<?,I>,I,Boolean>, EquivalenceOracle.DFAEquivalenceOracle<I>

public final class DFACacheConsistencyTest<I>
extends Object
implements EquivalenceOracle.DFAEquivalenceOracle<I>

An EquivalenceOracle that tests an hypothesis for consistency with the contents of a DFACacheOracle.

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
DFACacheConsistencyTest(IncrementalDFABuilder<I> incDfa, Lock lock) Constructor.

Method Summary

Modifier and Type	Method and Description
DefaultQuery<I,Boolean>	findCounterExample(DFA<?,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

DFACacheConsistencyTest

public DFACacheConsistencyTest(IncrementalDFABuilder<I> incDfa,
                               Lock lock)

Constructor.

Parameters:

incDfa - the IncrementalDFABuilder data structure of the cache

Method Detail

findCounterExample

public DefaultQuery<I,Boolean> findCounterExample(DFA<?,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<DFA<?,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.