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Proof step 4 from proof newrefs-butlast-01 (previous step)

⊦ newref_list(1, st) .butlast = newref_list(0, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ newref_list(0, st) = []
Proof step 3:
⊦ newref_list(1, st) .butlast = []

Rule argument

[crewrite-arg: newrefs-zero, F, [st] → [st]]

Additional information

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