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Proof step 6 from proof cyclic-not-null (previous step)

cyclic(str, jvmref, st) ⊦

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ cyclic(str, r, st) ↔ (∃ refs. dups(refs) ∧ refs .first = r ∧ validrefs(str, refs, st[r -- _type] .type, st))
Proof step 5:
∃ refs. dups(refs) ∧ refs .first = jvmref ∧ validrefs(str, refs, st[jvmref -- _type] .type, st) ⊦

Rule argument

[crewrite-arg: cyclic-def-simple, F, [st, r, str] → [st, jvmref, str]]

Additional information

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