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Xsts Analysis subproject in the Theta model checking framework
/*
* Copyright 2024 Budapest University of Technology and Economics
*
* 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.
*/
package hu.bme.mit.theta.xsts.analysis;
import hu.bme.mit.theta.analysis.LTS;
import hu.bme.mit.theta.analysis.expr.ExprState;
import hu.bme.mit.theta.core.stmt.NonDetStmt;
import hu.bme.mit.theta.xsts.XSTS;
import java.util.Collection;
import java.util.stream.Collectors;
public final class XstsLts implements LTS, XstsAction> {
private final NonDetStmt trans;
private final NonDetStmt env;
private final NonDetStmt init;
private final XstsStmtOptimizer stmtOptimizer;
private XstsLts(final XSTS xsts, final XstsStmtOptimizer stmtOptimizer) {
trans = xsts.getTran();
env = xsts.getEnv();
init = xsts.getInit();
this.stmtOptimizer = stmtOptimizer;
}
public static LTS, XstsAction> create(final XSTS xsts,
final XstsStmtOptimizer stmtOptimizer) {
return new XstsLts<>(xsts, stmtOptimizer);
}
@Override
public Collection getEnabledActionsFor(XstsState state) {
NonDetStmt enabledSet;
if (!state.isInitialized()) {
enabledSet = init;
} else if (state.lastActionWasEnv()) {
enabledSet = trans;
} else {
enabledSet = env;
}
return enabledSet.getStmts().stream()
.map(stmt -> stmtOptimizer.optimizeStmt(state, stmt))
.map(XstsAction::create)
.collect(Collectors.toList());
}
}