Goal:
    a : byte  b : byte  e : NoConfusion_byte a b
  ============================
   (noConfusion_byte_obligation_2 a b (noConfusion_byte_obligation_1 a b e) =
    e)


DEBUG:Going to execute:
unfold Tactics.fix_proto in *
Level 1: Backtrace:

No matching clauses for match.
Level 0: Backtrace:

No matching clauses for match.