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Proof step 4 from proof validref-put-statfield (previous step)

st[r -- _type] .type ≤ ty1, junkref(str, r, st) ⊦ r = jvmref, junkref(str, r, st[jvmref -- sk, val])

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 3:
⊦ rk1 .ref = jvmref ∧ r ≠ jvmref → (junkref(str, r, st[rk1, val]) ↔ junkref(str, r, st))

Rule argument

[crewrite-arg: junkref-put-statfield , F , [val, rk1, st, r, str] → [val, jvmref -- sk, st, r, str] ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ (r -- sk) .ref = r])], [EXTRATERMS : (val, jvmref -- sk, st, r, str)]]