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Proof step 3 from proof validval-field-norefval (previous step)

⊦ validval(str, val, ty, st) ∧ ty ≠ void_type ↔ okval(val, ty), mkfs(class, ty, fieldvar) ' = _length, is_referencevalue(val)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 2:
⊦ validval(str, val, ty, st) ↔ okval(val, ty) ∧ (is_referencevalue(val) → validrefval(str, val, ty, st))

Rule argument

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

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ okval(val, void_type) ↔ is_referencevalue(val)])], [EXTRATERMS : (st, ty, val, str)]]