Goal:
    x : t  y : t
  ============================
   (reflectProp (x = y) (eqb x y))


DEBUG:Going to execute:
try typeclasses eauto  10 with program
Level 0: Backtrace:

No head constant to reduce.
Level 0: Backtrace:

No head constant to reduce.
Level 0: Backtrace:

No head constant to reduce.
Level 0: Backtrace:

No head constant to reduce.
Level 0: Backtrace:

No head constant to reduce.
Level 0: Backtrace:

No applicable tactic.