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Proof step 7 from proof junkref-not-valid (previous step)

is_obj(str, r, st) ∨ is_array(str, r, st) ⊦ r = jvmref, is_valid_ref(r, st), junkref(str, r, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 3:
⊦ is_valid_ref(r, st) ↔ is_obj(r, st) ∨ is_array(r, st)
Proof step 6:
is_obj(str, r, st) ∨ is_array(str, r, st) ⊦ r = jvmref, is_obj(r, st) ∨ is_array(r, st), junkref(str, r, st)

Rule argument

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

Additional information

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