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Proof step 8 from proof validref-put-norefval (previous step)

validref(str, r, ty, st), okval(val, ty0) ⊦ mkfs(class, ty0, fieldvar) ' = _length, ty0 = void_type, validref(str, r, ty, st[r1 -- mkfs(class, ty0, fieldvar) ', val]), is_referencevalue(val)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ validref(str, r, ty, st) ↔ r = jvmref ∨ st[r -- _type] .type ≤ ty ∧ ¬ junkref(str, r, st)
Proof step 7:
validref(str, r, ty, st), okval(val, ty0) ⊦ mkfs(class, ty0, fieldvar) ' = _length, ty0 = void_type, r = jvmref ∨ (st[r1 -- mkfs(class, ty0, fieldvar) ', val][r -- _type]) .type ≤ ty ∧ ¬ junkref(str, r, st[r1 -- mkfs(class, ty0, fieldvar) ', val]), is_referencevalue(val)

Rule argument

[crewrite-arg: validref-def , F , [st, ty, r, str] → [st[r1 -- mkfs(class, ty0, fieldvar) ', val], ty, r, str] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st[r1 -- mkfs(class, ty0, fieldvar) ', val], ty, r, str)]]