(benchmark Isabelle
:extrasorts ( T1)
:extrapreds (
  (up_1)
 )
:assumption (not (iff (iff (iff (iff (iff (iff (iff (iff (iff up_1 up_1) up_1) up_1) up_1) up_1) up_1) up_1) up_1) up_1))
:formula true
)
