org.sosy_lab.cpachecker.cpa.alwaystop.AlwaysTopStopOperator.java Source code

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Here is the source code for org.sosy_lab.cpachecker.cpa.alwaystop.AlwaysTopStopOperator.java

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/*
 *  CPAchecker is a tool for configurable software verification.
 *  This file is part of CPAchecker.
 *
 *  Copyright (C) 2007-2014  Dirk Beyer
 *  All rights reserved.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *
 *  CPAchecker web page:
 *    http://cpachecker.sosy-lab.org
 */
package org.sosy_lab.cpachecker.cpa.alwaystop;

import java.util.Collection;

import org.sosy_lab.cpachecker.core.interfaces.AbstractState;
import org.sosy_lab.cpachecker.core.interfaces.Precision;
import org.sosy_lab.cpachecker.core.interfaces.StopOperator;

import com.google.common.base.Predicates;
import com.google.common.collect.Iterables;

enum AlwaysTopStopOperator implements StopOperator {

    INSTANCE;

    @Override
    public boolean stop(AbstractState pElement, Collection<AbstractState> pReached, Precision pPrecision) {

        assert pElement == AlwaysTopState.INSTANCE;
        assert pPrecision == AlwaysTopPrecision.INSTANCE;
        assert Iterables.all(pReached, Predicates.<AbstractState>equalTo(AlwaysTopState.INSTANCE));

        return !pReached.isEmpty();
    }
}