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Proof step 8 from proof validref-isarrayref (previous step)

i ≤ st[r -- _length] .intval, validref(str, r, mkarraytype(ty), st) ⊦ r = jvmref, is_arrayref(r, i, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ r ≠ jvmref ∧ (¬ is_valid_ref(str, r, st) ∨ ¬ st[r -- _type] .type ≤ ty) → ¬ validref(str, r, ty, st)
Proof step 7:
¬ (r ≠ jvmref ∧ (¬ is_valid_ref(str, r, st) ∨ ¬ st[r -- _type] .type ≤ mkarraytype(ty))), i ≤ st[r -- _length] .intval, validref(str, r, mkarraytype(ty), st) ⊦ r = jvmref, is_arrayref(r, i, st)

Rule argument

[crewrite-arg: validref-is-junk , F , [st, ty, r, str] → [st, mkarraytype(ty), r, str] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, mkarraytype(ty), r, str)]]