public override Element /*!*/ Widen(Element /*!*/ a, Element /*!*/ b)
{
//Contract.Requires(b != null);
//Contract.Requires(a != null);
Contract.Ensures(Contract.Result <Element>() != null);
widenCount++;
return(lattice.Widen(a, b));
}
public PolyhedraEnvironment <Expression> Widening(PolyhedraEnvironment <Expression> prev)
{
PolyhedraEnvironment <Expression> result;
if (AbstractDomainsHelper.TryTrivialJoin(this, prev, out result))
{
return(result);
}
else
{
// Boogie's polyhedra has it in the other order
return(Factory(UnderlyingPolyhedra.Widen(prev.embedded, embedded), intv.Widening(prev.intv)));
}
}
