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Proof step 4 from proof validval-null (conclusion)

⊦ validval(str, refval(jvmref), mkclasstype(class), st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ validval(str, val, ty, st) ↔ okval(val, ty) ∧ (is_referencevalue(val) → validrefval(str, val, ty, st))
Proof step 2:
⊦ validrefval(str, refval(r), ty, st) ↔ validref(str, r, ty, st)
Proof step 3:
⊦ validref(str, jvmref, ty, st)

Rule argument

[crewrite-arg: validval-def , F , [st, ty, val, str] → [st, mkclasstype(class), refval(jvmref), str] ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ okval(refval(r), ty) ↔ ty = void_type ∨ is_reftype(ty)], [CSIMPSEQ : ⊦ mkclasstype(class) ≠ void_type], [CSIMPSEQ : ⊦ is_reftype(mkclasstype(class))], [CSIMPSEQ : ⊦ is_referencevalue(refval(r))])], [EXTRATERMS : (st, mkclasstype(class), refval(jvmref), str)]]