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Proof step 36 from proof validrefs-junkrefs-01 (previous step)

st[r -- i '] = refval(r0), junkrefs(str, r0 ' + refs, st[r -- _type] .type .type, st), i < st[r -- _length] .intval, is_array(str, r, st), 0 < st[r -- _length] .intval, 0 ≤ i, st[r -- _type] .type ≤ ty ⊦ r = jvmref, validrefs(str, r ', ty, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 35:
⊦ validrefs(str, r ', ty, st) ↔ r = jvmref ∨ r ≠ jvmref ∧ is_valid_ref(str, r, st) ∧ st[r -- _type] .type ≤ ty

Rule argument

[crewrite-arg: validrefs-one, F, [st, ty, r, str] → [st, ty, r, str]]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_array(str, r, st) → is_valid_ref(str, r, st)])], [EXTRATERMS : (st, ty, r, str)]]