Goal:
    s : t  s' : t  e : false = false  H : lt s s'  H0 : s = s'
  ============================
   False


DEBUG:Going to execute:
match goal with
           | H:~ _ |- _ => solve [ case H; trivial ]
           end
Level 1: Backtrace:

No such assumption.
Level 0: Backtrace:

No such assumption.
Level 0: Backtrace:

No such assumption.
Level 0: Backtrace:

No such assumption.