src/HOL/SMT/Examples/cert/z3_fol_04

canonical insert operation; generalized lemma foldl_apply_inv to foldl_apply

(benchmark Isabelle
:extrasorts ( T1 T2)
:extrafuns (
  (uf_2 T1)
  (uf_3 T1)
 )
:extrapreds (
  (up_1 T1)
 )
:assumption (if_then_else (up_1 uf_2) (not (exists (?x1 T1) (up_1 ?x1))) (forall (?x2 T1) (not (up_1 ?x2))))
:assumption (not (implies (up_1 uf_2) (up_1 uf_3)))
:formula true
)