public void Assign(Expression x, Expression exp, INumericalAbstractDomainQuery <Variable, Expression> preState)
{
// Infer some x >= 0 invariants which requires the information from the two domains
// The information should be inferred in the pre-state
List <Expression> geqZero;
// if (this.ExpressionManager.Encoder!= null)
{
geqZero = new GreaterEqualThanZeroConstraints <Variable, Expression>(this.ExpressionManager).InferConstraints(x, exp, preState);
Contract.Assert(Contract.ForAll(geqZero, condition => condition != null));
}
/* else
* {
* geqZero = new List<Expression>();
* // F: we do not decompile ForAll in the case below
* Contract.Assume(Contract.ForAll(geqZero, condition => condition != null));
* }
*/
Contract.Assert(Contract.ForAll(geqZero, condition => condition != null));
this.Right.Assign(x, exp, preState);
this.Left.Assign(x, exp, preState);
// The information is assumed in the post-state...
foreach (var condition in geqZero)
{
this.TestTrue(condition);
}
}
public override void Assign(Expression x, Expression exp)
{
// F: I am lazy...
Contract.Assume(x != null);
Contract.Assume(exp != null);
// Infer some x >= 0 invariants which requires the information from the two domains
// The information should be inferred in the pre-state
var geqZero = new GreaterEqualThanZeroConstraints <Variable, Expression>(this.ExpressionManager).InferConstraints(x, exp, this);
this.Left.Assign(x, exp, this);
this.Right.Assign(x, exp);
// The information is assumed in the post-state...
foreach (var condition in geqZero)
{
this.TestTrue(condition);
}
}
