private static Variable ExtractAccessHasOccurredVar(CallCounterexample err)
{
var VFV = new VariableFinderVisitor(
RaceInstrumentationUtil.MakeHasOccurredVariableName(QKeyValue.FindStringAttribute(err.FailingRequires.Attributes, "array"), GetAccessType(err)));
VFV.Visit(err.FailingRequires.Condition);
return(VFV.GetVariable());
}
private IEnumerable <SourceLocationInfo> GetPossibleSourceLocationsForFirstAccessInRace(CallCounterexample CallCex, string ArrayName, AccessType AccessType, string RaceyState)
{
string AccessHasOccurred = RaceInstrumentationUtil.MakeHasOccurredVariableName(ArrayName, AccessType);
string AccessOffset = RaceInstrumentationUtil.MakeOffsetVariableName(ArrayName, AccessType);
AssumeCmd ConflictingAction = DetermineConflictingAction(CallCex, RaceyState, AccessHasOccurred, AccessOffset);
var ConflictingState = QKeyValue.FindStringAttribute(ConflictingAction.Attributes, "captureState");
if (ConflictingState.Contains("loop_head_state"))
{
// The state may have been renamed (for example, if k-induction has been employed),
// so we need to find the original state name. This can be computed as the substring before the first
// occurrence of '$'. This inversion is fragile, and would be a good candidate for making robust
string ConflictingStatePrefix;
if (ConflictingState.Contains('$'))
{
ConflictingStatePrefix = ConflictingState.Substring(0, ConflictingState.IndexOf('$'));
}
else
{
ConflictingStatePrefix = ConflictingState;
}
Program originalProgram = GetOriginalProgram();
var blockGraph = originalProgram.ProcessLoops(GetOriginalImplementation(originalProgram));
Block header = FindLoopHeaderWithStateName(ConflictingStatePrefix, blockGraph);
Debug.Assert(header != null);
HashSet <Block> LoopNodes = new HashSet <Block>(
blockGraph.BackEdgeNodes(header).Select(Item => blockGraph.NaturalLoops(header, Item)).SelectMany(Item => Item)
);
return(GetSourceLocationsFromBlocks("_CHECK_" + AccessType + "_" + ArrayName, LoopNodes));
}
else if (ConflictingState.Contains("call_return_state"))
{
return(GetSourceLocationsFromCall("_CHECK_" + AccessType + "_" + ArrayName,
QKeyValue.FindStringAttribute(ConflictingAction.Attributes, "procedureName")));
}
else
{
Debug.Assert(ConflictingState.Contains("check_state"));
return(new HashSet <SourceLocationInfo> {
new SourceLocationInfo(ConflictingAction.Attributes, GetSourceFileName(), ConflictingAction.tok)
});
}
}
