private VariableTrackingPrecision mergeValuePrecisionsForSubgraph(
final ARGState pRefinementRoot, final ARGReachedSet pReached) {
// get all unique precisions from the subtree
Set<VariableTrackingPrecision> uniquePrecisions = Sets.newIdentityHashSet();
for (ARGState descendant : getNonCoveredStatesInSubgraph(pRefinementRoot)) {
uniquePrecisions.add(extractValuePrecision(pReached, descendant));
}
// join all unique precisions into a single precision
VariableTrackingPrecision mergedPrecision = Iterables.getLast(uniquePrecisions);
for (VariableTrackingPrecision precision : uniquePrecisions) {
mergedPrecision = mergedPrecision.join(precision);
}
return mergedPrecision;
}
private VariableTrackingPrecision mergeAllValuePrecisionsFromSubgraph(
ARGState refinementRoot, UnmodifiableReachedSet reached) {
VariableTrackingPrecision rootPrecision =
Precisions.extractPrecisionByType(
reached.getPrecision(refinementRoot), VariableTrackingPrecision.class);
// find all distinct precisions to merge them
Set<Precision> precisions = Sets.newIdentityHashSet();
for (ARGState state : refinementRoot.getSubgraph()) {
if (!state.isCovered()) {
// covered states are not in reached set
precisions.add(reached.getPrecision(state));
}
}
for (Precision prec : precisions) {
rootPrecision =
rootPrecision.join(
Precisions.extractPrecisionByType(prec, VariableTrackingPrecision.class));
}
return rootPrecision;
}