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Proof step 14 from proof validref-put-norefval-equiv (previous step)

okval(st[r1 -- fs '], fs .type), r1 -- fs ' ∈ st, okval(val, fs .type), r1 ∈ st ⊦ validref(str, r, ty, st[r1 -- fs ', val]) ↔ validref(str, r, ty, st), fs ' = _length, fs .type = void_type, is_referencevalue(val)

Heuristic elimination applied rule insert elim lemma

And obtained the following new goals

Proof step 13:
fs = mkfs(class, ty0, fieldvar), okval(st[r1 -- fs '], ty0), r1 -- fs ' ∈ st, okval(val, ty0), r1 ∈ st ⊦ validref(str, r, ty, st[r1 -- fs ', val]) ↔ validref(str, r, ty, st), fs ' = _length, ty0 = void_type, is_referencevalue(val)

Rule argument

[speclemmaarg: , class = fs .class ∧ ty = fs .type ∧ fieldvar = fs .field ↔ fs = mkfs(class, ty, fieldvar) ,[fs, class, ty, fieldvar] → [fs, class, ty0, 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, ty0, fieldvar)]]