public DisInterval BoundsFor(Expression v)
{
var result = FirstDisjunct.BoundsFor(v);
for (int i = 1; i < this.disjuncts.Length; i++)
{
result = (DisInterval)result.Join(this.disjuncts[i].BoundsFor(v));
}
return(result);
}
public override INumericalAbstractDomain <BoxedVariable <Variable>, BoxedExpression> Assume(APC pc, string tag, Variable condition, INumericalAbstractDomain <BoxedVariable <Variable>, BoxedExpression> data)
{
bool StateValueIsKnown = false;
Variable varForThisDotState = ThisDotState(pc);
BoxedExpression boxedThisDotState = BoxedExpression.For(this.context.ExpressionContext.Refine(pc, varForThisDotState), this.decoderForExpressions.Outdecoder);
BoxedExpression boxedCondition = BoxedExpression.For(this.context.ExpressionContext.Refine(pc, condition), this.decoderForExpressions.Outdecoder);
var interval = data.BoundsFor(boxedThisDotState);
AbstractDomains.Numerical.Rational rat;
if (interval.TryGetSingletonValue(out rat))
{
long lv;
if (rat.TryInt64(out lv))
{
int state = (int)lv;
StateValueIsKnown = true;
}
}
if (tag == "false")
{
data.TestFalse(boxedCondition);
}
else if (tag == "true")
{
data.TestTrue(boxedCondition);
}
// This assume statement is the beginning of a state slice only if the state value is not known
// prior to the statement.
if (!StateValueIsKnown)
{
interval = data.BoundsFor(boxedThisDotState);
if (interval.TryGetSingletonValue(out rat))
{
long lv;
if (rat.TryInt64(out lv))
{
int state = (int)lv;
if (this.stateSliceEntries.ContainsKey(state))
{
this.stateSliceEntries[state].Add(pc);
}
else
{
this.stateSliceEntries[state] = new Set <APC>(pc);
}
}
}
}
return(base.Assume(pc, tag, condition, data));
}
/// <summary>
/// WB(dest) == size
/// </summary>
public override INumericalAbstractDomain<BoxedVariable<Variable>, BoxedExpression> Localloc(APC pc, Variable dest, Variable size, INumericalAbstractDomain<BoxedVariable<Variable>, BoxedExpression> data)
{
Variable WB_dest;
if (this.Context.ValueContext.TryGetWritableBytes(this.Context.MethodContext.CFG.Post(pc), dest, out WB_dest))
{
var sizeExp = ToBoxedExpression(pc, size);
var tryConst = data.BoundsFor(sizeExp);
if (tryConst.IsSingleton)
{
data.AssumeInDisInterval(new BoxedVariable<Variable>(WB_dest), tryConst);
}
data = data.TestTrueGeqZero(sizeExp);
data = data.TestTrueEqual(ToBoxedExpression(pc, WB_dest), sizeExp);
}
return data;
}
public override INumericalAbstractDomain <BoxedExpression> Assume(APC pc, string tag, Variable condition, INumericalAbstractDomain <BoxedExpression> data)
{
BoxedExpression boxedCondition = BoxedExpression.For(this.context.Refine(pc, condition), this.decoderForExpressions.Outdecoder);
if (tag == "false")
{
data.TestFalse(boxedCondition);
}
else if (tag == "true")
{
data.TestTrue(boxedCondition);
}
Variable varForThisDotState = ThisDotState(pc);
BoxedExpression boxedThisDotState = BoxedExpression.For(this.context.Refine(pc, varForThisDotState), this.decoderForExpressions.Outdecoder);
AbstractDomains.Numerical.Interval interval = data.BoundsFor(boxedThisDotState);
AbstractDomains.Numerical.Rational rat;
if (interval.TryGetSingletonValue(out rat))
{
long lv;
if (rat.TryInt64(out lv))
{
int state = (int)lv;
if (this.stateInfo.ContainsKey(state))
{
this.stateInfo[state].Add(pc);
}
else
{
this.stateInfo[state] = new Set <APC>(pc);
}
}
}
return(base.Assume(pc, tag, condition, data));
}
