Set: pp::colors
  Set: pp::unicode
  Imported 'tactic'
  Assumed: list
  Assumed: nil
  Assumed: cons
  Assumed: map
  Assumed: map_cons
  Assumed: map_nil
Visit, depth: 1
Visit, depth: 2
Step: 2
Visit, depth: 2
Visit, depth: 3
Step: 3
Visit, depth: 3
Visit, depth: 4
Visit, depth: 5
Visit, depth: 5
Step: 5
Visit, depth: 5
Step: 4
Step: 3
Visit, depth: 3
Visit, depth: 4
Step: 4
Visit, depth: 4
Visit, depth: 4
Visit, depth: 5
Visit, depth: 5
Visit, depth: 6
Step: 6
Step: 5
Step: 4
Step: 3
Rewrite using: map_cons
Visit, depth: 3
Visit, depth: 4
Visit, depth: 5
Visit, depth: 5
Step: 4
Visit, depth: 4
Rewrite using: map_cons
Visit, depth: 5
Visit, depth: 6
Visit, depth: 7
Visit, depth: 7
Step: 6
Visit, depth: 6
Rewrite using: map_nil
Step: 6
Visit, depth: 6
Visit, depth: 7
Step: 6
Step: 5
Step: 4
Visit, depth: 4
Visit, depth: 5
Step: 4
Step: 3
Step: 2
Rewrite using: eq_id
Visit, depth: 2
Step: 2
Step: 1
  Proved: T1