public INumericalAbstractDomain <BoxedVariable <Variable>, BoxedExpression> Join(IMethodResult <Variable> mr, INumericalAbstractDomain <BoxedVariable <Variable>, BoxedExpression> astate1, INumericalAbstractDomain <BoxedVariable <Variable>, BoxedExpression> astate2) { ArithmeticAnalysis an = mr as ArithmeticAnalysis; if (an == null) { return(null); } bool bWeaker; return(an.Join(new Pair <APC, APC>(), astate1, astate2, out bWeaker, false)); }