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Proof step 17 from proof validval-putrkvs (previous step)

sk .fs = mkfs(class, ty, fieldvar), is_fskey(sk), validvals(str, rkvs, st), validval(str, val, ty, st) ⊦ sk = _length, ty = void_type, validval(str, val, ty, st[rkvs])

Heuristic elimination applied rule insert elim lemma

And obtained the following new goals

Proof step 16:
sk = fs ', fs = mkfs(class, ty, fieldvar), is_fskey(sk), validvals(str, rkvs, st), validval(str, val, ty, st) ⊦ sk = _length, ty = void_type, validval(str, val, ty, st[rkvs])

Rule argument

[speclemmaarg: ,is_fskey(sk) → (fs = sk .fs ↔ sk = fs ') ,[sk, fs] → [sk, fs] ,T ,storekey , ,elim-03 ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPELIM : ⊦ is_fskey(sk) → (fs = sk .fs ↔ sk = fs ')])], [EXTRATERMS : (sk, fs)]]