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Proof step 12 from proof validval-putrkvs (previous step)

is_referencevalue(val), validvals(str, rkvs, st), is_reftype(ty), validrefval(str, val, ty, st) ⊦ mkfs(class, ty, fieldvar) ' = _length, ty = void_type, validrefval(str, val, ty, st[rkvs])

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 5:
⊦ validrefval(str, val, ty, st) ↔ is_referencevalue(val) ∧ validref(str, val .refval, ty, st)
Proof step 11:
is_referencevalue(val), validvals(str, rkvs, st), is_reftype(ty), validrefval(str, val, ty, st) ⊦ mkfs(class, ty, fieldvar) ' = _length, ty = void_type, is_referencevalue(val) ∧ validref(str, val .refval, ty, st[rkvs])

Rule argument

[crewrite-arg: validrefval-def , F , [st, ty, val, str] → [st[rkvs], ty, val, str] ]

Additional information

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