src/HOL/SMT/Examples/cert/z3_bv_02

removed unused code and unused arguments,
tuned

(benchmark Isabelle
:extrasorts ( T2 T1)
:extrafuns (
  (uf_2 T1)
  (uf_1 BitVec[4] BitVec[4] T1)
  (uf_3 T1 T2)
  (uf_4 BitVec[4])
 )
:assumption (forall (?x1 BitVec[4]) (?x2 BitVec[4]) (iff (= (uf_1 ?x1 ?x2) uf_2) (bvule ?x1 ?x2)))
:assumption (not (= (uf_3 (uf_1 bv0[4] uf_4)) (uf_3 uf_2)))
:formula true
)