src/HOL/SMT/Examples/cert/z3_nlarith_02

code cache without copy; tuned

(benchmark Isabelle
:extrafuns (
  (uf_1 Int)
  (uf_2 Int)
  (uf_3 Int)
 )
:assumption (not (= (* uf_1 (+ (+ uf_2 1) uf_3)) (+ (* uf_1 uf_2) (* uf_1 (+ uf_3 1)))))
:formula true
)