Goal:
    A : Type  HA : ReflectEq A  x : option A  y : option A
  ============================
   (reflectProp (x = y) (eq_option eqb x y))


DEBUG:Going to execute:
auto
DEBUG LTAC Evaluated term: (reflectProp (x = y) (eq_option eqb x y))
DEBUG LTAC Evaluated term: Prop
Level 3: type of T
 has value 
Prop