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Proof step 9 from proof validrefs-one (previous step)

is_valid_ref(str, r, st), st[r -- _type] .type ≤ ty ⊦ r = jvmref, validrefs(str, r ', ty, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

[speclemmaarg: ,is_valid_ref(str, r, st) ↔ is_obj(str, r, st) ∨ is_array(str, r, st) ,[st, r, str] → [st, r, str] ,F ,addfuns , ,is-valid-ref-stronger-def ]

Additional information

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