∀ {α : Type u_1} {β : α → Type u_2} (ls size : ℕ) (l r : Std.DTreeMap.Internal.Impl α β),
  (l.Balanced ∧
        r.Balanced ∧ (l.size + r.size ≤ 1 ∨ l.size ≤ 3 * r.size ∧ r.size ≤ 3 * l.size) ∧ size = l.size + 1 + r.size) ∧
      (size + 0 ≤ 1 ∨ size ≤ 3 * 0 ∧ 0 ≤ 3 * size) ∧ ls = size + 1 + 0 →
    0 > 3 * (l.size + 1 + r.size + 1 + 0) → False