public override Expression Generate(Expression expression, ProofState proofState) { //need to get postconds from unresolved prog var prog = proofState.GetDafnyProgram(); var tld = prog.DefaultModuleDef.TopLevelDecls.FirstOrDefault(x => x.Name == proofState.ActiveClass.Name) as ClassDecl; if (tld != null) { var member = tld.Members.FirstOrDefault(x => x.Name == proofState.TargetMethod.Name) as Method; var posts = new List <Expression>(); if (member != null) { foreach (var post in member.Ens) { posts.Add(post.E); } } return(GenerateEAtomExprAsSeq(posts)); } return(GenerateEAtomExprAsSeq(new List <Expression>())); }