1
(benchmark Isabelle
2
:extrasorts ( T1)
3
:extrapreds (
4
(up_1)
5
(up_2)
6
(up_3)
7
)
8
: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)))
9
:formula true
10