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Proof step 6 from proof junkref-abstract (previous step)

st[r -- _type] .type = mkarraytype(abstract_type), is_valid_ref(str, r, st) ⊦ r = jvmref, junkref(str, r, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 2:
⊦ is_valid_ref(str, r, st) ↔ is_obj(str, r, st) ∨ is_array(str, r, st)
Proof step 5:
st[r -- _type] .type = mkarraytype(abstract_type), is_obj(str, r, st) ∨ is_array(str, r, st) ⊦ r = jvmref, junkref(str, r, st)

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)]]