{motive : (a : ℕ) → Std.Tactic.BVDecide.BVExpr a → Sort u} →
  {a : ℕ} →
    (t : Std.Tactic.BVDecide.BVExpr a) →
      t.ctorIdx = 7 →
        ({m n : ℕ} →
            (lhs : Std.Tactic.BVDecide.BVExpr m) →
              (rhs : Std.Tactic.BVDecide.BVExpr n) → motive m (lhs.shiftLeft rhs)) →
          motive a t