Goal:
    x : t  y : t  z : t  H0 : lt z y  H : compare z x = Lt
  ============================
   (Gt = Gt -> CompOpp Lt = Gt)


DEBUG:Going to execute:
done
DEBUG LTAC Evaluated term: compare_sym
DEBUG LTAC Evaluated term: compare_sym
DEBUG LTAC Evaluated term: H
DEBUG LTAC Evaluated term: H
DEBUG LTAC Evaluated term: Prop
DEBUG LTAC Evaluated term: Prop