(assert (= x9_plus 0))
(assert (= x9_minus 0))
(assert (= x7_plus 1))
(assert (= x7_minus 0))
(assert (= x5_plus 0))
(assert (= x5_minus 0))
(assert (= x4_plus 0))
(assert (= x4_minus 0))
(assert (= x0_plus 0))
(assert (= x0_minus 0))
(assert (= x8_plus 0))
(assert (= x8_minus 0))
(assert (= x2_plus 0))
(assert (= x2_minus 0))