Goal:
    G : t
  ============================
   (false -> exists z : Z, None = Some z /\ z <= 0)


DEBUG:Going to execute:
intuition congruence
Level 0: Backtrace:

Tactic failure: congruence failed.
Level 0: Backtrace:

Tactic failure: congruence failed.
Level 0: Backtrace:

Tactic failure: congruence failed.
Level 0: Backtrace:

Tactic failure: congruence failed.
Level 0: Backtrace:

Tactic failure: congruence failed.
Level 0: Backtrace:

Tactic failure: congruence failed.
Level 0: Backtrace:

Tactic failure: congruence failed.
Level 1: Backtrace:

Tactic failure: congruence failed.
Level 0: Backtrace:

Tactic failure: congruence failed.
Level 1: Backtrace:

Tactic failure: congruence failed.
Level 1: Backtrace:

Tactic failure: congruence failed.
Level 0: Backtrace:

Tactic failure: congruence failed.
Level 6: Backtrace:

Tactic failure: congruence failed.
Level 5: Backtrace:

Tactic failure: congruence failed.
Level 4: Backtrace:

Tactic failure: congruence failed.
Level 3: Backtrace:

Tactic failure: congruence failed.
Level 3: Backtrace:

Tactic failure: congruence failed.
Level 3: Backtrace:

Tactic failure: congruence failed.
Level 2: Backtrace:

Tactic failure: congruence failed.
Level 2: Backtrace:

Tactic failure: congruence failed.
Level 1: Backtrace:

Tactic failure: congruence failed.
Level 0: Backtrace:

Tactic failure: congruence failed.
Level 2: Backtrace:

Tactic failure: congruence failed.
Level 2: Backtrace:

Tactic failure: congruence failed.
Level 2: Backtrace:

Tactic failure: congruence failed.
Level 1: Backtrace:

Tactic failure: congruence failed.
Level 1: Backtrace:

Tactic failure: congruence failed.
Level 0: Backtrace:

Tactic failure: congruence failed.
Level 0: Backtrace:

Tactic failure: congruence failed.
Level 0: Backtrace:

Tactic failure: congruence failed.