// Remove declarations of globals that are not tracked
public override Program VisitProgram(Program node)
{
/*
* Log.Write(Log.Debug, "Tracking variables: ");
* foreach (var s in trackedVars)
* {
* Log.Write(Log.Debug, s + " ");
* }
* Log.Write(Log.Debug, "\n");
*/
HashSet <string> declaredGlobals = new HashSet <string>();
// Partition the list into global declarations and others
var globals = node.TopLevelDeclarations.OfType <GlobalVariable>().ToList();
var rest = node.TopLevelDeclarations.Where(decl => !(decl is GlobalVariable)).ToList();
// Gather all declared global variables
foreach (Declaration d in globals)
{
var g = d as GlobalVariable;
if (g == null)
{
continue;
}
// Store declared global
declaredGlobals.Add(g.Name);
}
if (trackedVars.Contains(new VarSet(declaredGlobals, BoogieUtil.GetAllProcNames(node))))
{
return(node);
}
// Make sure all the vars to track are declared
Debug.Assert(declaredGlobals.Contains(trackedVars.Variables));
// Visit declaration other than global variable declarations
for (int i = 0, n = rest.Count; i < n; i++)
{
rest[i] = this.VisitDeclaration(rest[i]);
}
// Remove globals that are not tracked
node.TopLevelDeclarations = globals.Where(x => isTrackedVariable(x as GlobalVariable));
node.AddTopLevelDeclarations(rest);
foreach (var proc in slicedEnsures)
{
if (visitedImplementations.Contains(proc))
{
Log.WriteLine(Log.Warning, "Slicing away (non-free) ensures condition");
}
}
if (slicedRequires.Any())
{
Log.WriteLine(Log.Warning, "Slicing away (non-free) requires condition");
}
// Remove annotations that won't parse because of dropped variables
RemoveVarsFromAttributes.Prune(node);
return(node);
}
