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Proof step 3 from proof validref-new (previous step)

is_valid_ref(r, st), newref(r, st) ⊦ r = jvmref

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ is_valid_ref(r, st) ↔ is_obj(r, st) ∨ is_array(r, st)
Proof step 2:
⊦ newref(r, st) → ¬ is_obj(r, st)

Rule argument

[crewrite-arg: is-valid-ref, F, [st, r] → [st, r]]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ newref(r, st) → ¬ is_array(r, st)])], [EXTRATERMS : (st, r)]]