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Proof step 6 from proof isarray-del (previous step)

⊦ r = r0, is_array(r0, st -- r) ↔ is_array(r0, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ is_array(r, st) ↔ r ≠ jvmref ∧ r -- _type ∈ st ∧ is_typevalue(st[r -- _type]) ∧ is_arraytype(st[r -- _type] .type) ∧ okarray(r, st[r -- _type] .type .type, st)
Proof step 5:
⊦ r = r0, r0 ≠ jvmref ∧ r0 -- _type ∈ st -- r ∧ is_typevalue((st -- r)[r0 -- _type]) ∧ is_arraytype((st -- r)[r0 -- _type] .type) ∧ okarray(r0, (st -- r)[r0 -- _type] .type .type, st -- r) ↔ is_array(r0, st)

Rule argument

[crewrite-arg: is-any-array, F, [st, r] → [st -- r, r0]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st -- r, r0)]]