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Proof step 8 from proof validval-putrkvs (previous step)

validvals(str, rkvs, st), is_reftype(ty), validref(str, r, ty, st) ⊦ mkfs(class, ty, fieldvar) ' = _length, ty = void_type, validref(str, r, ty, st[rkvs])

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 7:
⊦ validvals(str, rkvs, st) ∧ validref(str, r, ty, st) → validref(str, r, ty, st[rkvs])

Rule argument

[crewrite-arg: validref-putrkvs , F , [rkvs, st, ty, r, str] → [rkvs, st, ty, r, str] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (rkvs, st, ty, r, str)]]