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Proof step 8 from proof validrefnotnull-put-statfield (previous step)

validref(str, r, ty1, st) ⊦ r = jvmref, validref(str, r, ty1, st[jvmref -- sk, val])

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 4:
⊦ validref(str, r, ty, st) ↔ r = jvmref ∨ st[r -- _type] .type ≤ ty ∧ ¬ junkref(str, r, st)
Proof step 7:
validref(str, r, ty1, st) ⊦ r = jvmref, r = jvmref ∨ (st[jvmref -- sk, val][r -- _type]) .type ≤ ty1 ∧ ¬ junkref(str, r, st[jvmref -- sk, val])

Rule argument

[crewrite-arg: validref-def , F , [st, ty, r, str] → [st[jvmref -- sk, val], ty1, r, str] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st[jvmref -- sk, val], ty1, r, str)]]