src/HOL/SMT/Examples/cert/z3_prop_06

provide standard isabelle make targets;
slightly more accurate dependencies;

(benchmark Isabelle
:extrasorts ( T1)
:extrapreds (
  (up_1)
  (up_2)
  (up_3)
 )
:assumption (not (implies (or (and up_1 up_2) up_3) (or (implies up_1 (or (and up_3 up_2) (and up_1 up_3))) up_1)))
:formula true
)