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Proof step 2 from proof gft-not (previous step)

oktype(val, fs .type, st), goodfieldandtype(r, sk, st) ⊦ fs ' = _type, goodfieldandtype(r, sk, st[r0 -- fs ', val])

Heuristic elimination applied rule insert elim lemma

And obtained the following new goals

Proof step 1:
⊦ ¬ goodfieldandtype(r, sk, st[r0 -- mkfs(class0, ty, fieldvar) ', val]) ∧ mkfs(class0, ty, fieldvar) ' ≠ _type ∧ oktype(val, ty, st) → ¬ goodfieldandtype(r, sk, st)

Rule argument

[speclemmaarg: , class = fs .class ∧ ty = fs .type ∧ fieldvar = fs .field ↔ fs = mkfs(class, ty, fieldvar) ,[fs1, class0, ty, fieldvar] → [fs, class, ty, fieldvar] ,T ,fieldspec , ,elim ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPELIM : ⊦ class = fs .class ∧ ty = fs .type ∧ fieldvar = fs .field ↔ fs = mkfs(class, ty, fieldvar)])], [EXTRATERMS : (fs, class, ty, fieldvar)]]