Goal:
    x : t  Heq_anonymous : false = eqb x x
  ============================
   False


DEBUG:Going to execute:
try CoreTactics.solve_wf
Level 2: Backtrace:

No product even after head-reduction.
Level 2: Backtrace:

No product even after head-reduction.
Level 1: Backtrace:

No product even after head-reduction.
Level 0: Backtrace:

No product even after head-reduction.