∀ {w : ℕ} (llhs : Std.Tactic.BVDecide.BVExpr w) (lop : Std.Tactic.BVDecide.BVBinOp)
  (lrhs rlhs : Std.Tactic.BVDecide.BVExpr w) (rop : Std.Tactic.BVDecide.BVBinOp) (rrhs : Std.Tactic.BVDecide.BVExpr w),
  ¬lop = rop → ¬llhs.bin lop lrhs = rlhs.bin rop rrhs