(v0 x) | (v1 x)
(+ x (ite (<= x 0) 0 (+ 1 (+ y y)))) | (+ x (ite (<= x 0) 0 (+ (+ 1 y) y)))
(ite (<= x 0) 0 (+ 1 (+ y y))) | (ite (<= x 0) 0 (+ (+ 1 y) y))
(+ 1 (+ y y)) | (+ (+ 1 y) y)
