public static void PrintSymbolicTrace(SymbolicTrace st)
{
foreach (SymbolicBlock b in st)
{
b.Emit(new TokenTextWriter(Console.Out, true));
}
}
//traverse down a trace (List<Block>). At each program point:
// -Write the new SymbolicStore at each AssignCmd.
// -Write the guard condition for each AssumeCmd.
//the latter will be overwritten by an ExecUp
public static SymbolicTrace ExecDown(List <Block> bs, List <Variable> args)
{
SymbolicStore
curStore = new SymbolicStore(),
nextStore;
////initialize args with symbolic values
List <Variable> symbolicConstants = new List <Variable>();
for (int i = 0; i < args.Count; i++)
{
var v = args[i];
symbolicConstants.Add(B.Factory.MakeConstant(v.Name, v.TypedIdent.Type));
curStore.Add(new StoreLhs(v), Expr.Ident(symbolicConstants[i]));
}
var newTrace = new SymbolicTrace();
foreach (Block b in bs)
{
var tmp = ExecBlockDown(b, curStore, out nextStore);
newTrace.Add(ExecBlockDown(b, curStore, out nextStore));
curStore = nextStore;
}
return(newTrace);
}
public static Constraint ExecUp(SymbolicTrace trace)
{
var curCons = Constraint.True;
for (int i = trace.Count - 1; i >= 0; i--)
{
curCons = ExecBlockUp(trace[i], curCons);
}
return(curCons);
}
