Goal:
  
  x : string
  IHx : forall y z : t,
        compare x y = Lt -> compare y z = Lt -> compare x z = Lt
  b0 : Byte.byte
  y : string
  b : Byte.byte
  z : string
  ============================
   (compare x y = Lt -> compare y z = Lt -> compare x z = Lt)


DEBUG:Going to execute:
<coq-core.plugins.ltac::eauto@0> $1 $2 $3