/** Constructor. */
public PTAModelChecker(Prism prism, ModulesFile modulesFile, PropertiesFile propertiesFile)
throws PrismException {
this.prism = prism;
mainLog = prism.getMainLog();
this.modulesFile = modulesFile;
this.propertiesFile = propertiesFile;
// Get combined constant values from model/properties
constantValues = new Values();
constantValues.addValues(modulesFile.getConstantValues());
if (propertiesFile != null) constantValues.addValues(propertiesFile.getConstantValues());
// Build a combined label list and expand any constants
// (note labels in model are ignored (removed) during PTA translation so need to store here)
labelList = new LabelList();
for (int i = 0; i < modulesFile.getLabelList().size(); i++) {
labelList.addLabel(
modulesFile.getLabelList().getLabelNameIdent(i),
modulesFile.getLabelList().getLabel(i).deepCopy());
}
for (int i = 0; i < propertiesFile.getLabelList().size(); i++) {
labelList.addLabel(
propertiesFile.getLabelList().getLabelNameIdent(i),
propertiesFile.getLabelList().getLabel(i).deepCopy());
}
labelList = (LabelList) labelList.replaceConstants(constantValues);
// Build mapping from all (original model) variables to non-clocks only
int numVars = modulesFile.getNumVars();
nonClockVarMap = new int[numVars];
int count = 0;
for (int i = 0; i < numVars; i++) {
if (modulesFile.getVarType(i) instanceof TypeClock) {
nonClockVarMap[i] = -1;
} else {
nonClockVarMap[i] = count++;
}
}
}
/**
* Determine which locations in the PTA satisfy a (Boolean) expression. Note: This is rather
* inefficiently at the moment. TODO: potentially use explicit.StateMC on dummy model eventually
*/
private BitSet checkLocationExpression(Expression expr) throws PrismException {
int i, n;
BitSet res;
// Labels - expand and recurse
// (note: currently not used - these are expanded earlier)
if (expr instanceof ExpressionLabel) {
ExpressionLabel exprLabel = (ExpressionLabel) expr;
if (exprLabel.getName().equals("deadlock"))
throw new PrismException("The \"deadlock\" label is not yet supported for PTAs");
if (exprLabel.getName().equals("init"))
throw new PrismException("The \"init\" label is not yet supported for PTAs");
i = labelList.getLabelIndex(exprLabel.getName());
if (i == -1)
throw new PrismException("Unknown label \"" + exprLabel.getName() + "\" in property");
// Check recursively
return checkLocationExpression(labelList.getLabel(i));
}
// Other expressions...
else {
List<Object> states;
// Object[] state;
states = pta.getLocationNameList();
n = states.size();
res = new BitSet(n);
for (i = 0; i < n; i++) {
// state = (Object[])states.get(i);
State state = (State) states.get(i);
if (expr.evaluateBoolean(state, nonClockVarMap)) {
res.set(i);
}
}
}
return res;
}