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Proof step 17 from proof junkreflist-rec (conclusion)

⊦ junkrefs(str, val ' + vals, st) ↔ is_referencevalue(val) ∧ junkref(str, val .refval, st) ∨ junkrefs(str, vals, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ junkrefs(str, vals, st) ↔ (∃ r. refval(r) ∈ vals ∧ junkref(str, r, st))
Proof step 16:
⊦ (∃ r. refval(r) ∈ val ' + vals ∧ junkref(str, r, st)) ↔ is_referencevalue(val) ∧ junkref(str, val .refval, st) ∨ junkrefs(str, vals, st)

Rule argument

[crewrite-arg: junkreflist-def , F , [st, vals, str] → [st, val ' + vals, str] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, val ' + vals, str)]]