added byte_reader, which works without decoding and enables efficient length operation (for scala.util.parsing.input.Reader);
(benchmark Isabelle
:extrasorts ( T1)
:extrapreds (
(up_1)
(up_2)
(up_3)
(up_4)
)
:assumption (or (and up_1 up_2) (and up_3 up_4))
:assumption (not (or (and up_1 up_2) (and up_3 up_4)))
:formula true
)