NO Initial ITS Start location: l6 0: l0 -> l1 : retp^0'=retp^post0, xp^0'=xp^post0, rho^0'=rho^post0, x^0'=x^post0, retpp^0'=retpp^post0, rhop^0'=rhop^post0, (-rho^post0+rho^0 == 0 /\ -rhop^post0+rhop^0 == 0 /\ -1-xp^0+xp^post0 == 0 /\ retp^0-retp^post0 == 0 /\ retpp^0-retpp^post0 == 0 /\ -x^post0+x^0 == 0 /\ 1-rhop^0 <= 0), cost: 1 1: l0 -> l1 : retp^0'=retp^post1, xp^0'=xp^post1, rho^0'=rho^post1, x^0'=x^post1, retpp^0'=retpp^post1, rhop^0'=rhop^post1, (retpp^0-retpp^post1 == 0 /\ retp^0-retp^post1 == 0 /\ -rhop^post1+rhop^0 == 0 /\ 1-xp^0+xp^post1 == 0 /\ rhop^0 <= 0 /\ x^0-x^post1 == 0 /\ -rho^post1+rho^0 == 0), cost: 1 5: l1 -> l2 : retp^0'=retp^post5, xp^0'=xp^post5, rho^0'=rho^post5, x^0'=x^post5, retpp^0'=retpp^post5, rhop^0'=rhop^post5, (-rhop^post5+rhop^0 == 0 /\ retpp^post5 == 0 /\ retp^0-retp^post5 == 0 /\ -1+xp^0 <= 0 /\ xp^0-xp^post5 == 0 /\ x^0-x^post5 == 0 /\ rho^0-rho^post5 == 0), cost: 1 6: l1 -> l2 : retp^0'=retp^post6, xp^0'=xp^post6, rho^0'=rho^post6, x^0'=x^post6, retpp^0'=retpp^post6, rhop^0'=rhop^post6, (xp^0-xp^post6 == 0 /\ 2-xp^0 <= 0 /\ retp^0-retp^post6 == 0 /\ x^0-x^post6 == 0 /\ -rho^post6+rho^0 == 0 /\ -rhop^post6+rhop^0 == 0 /\ -1+retpp^post6 == 0), cost: 1 2: l2 -> l3 : retp^0'=retp^post2, xp^0'=xp^post2, rho^0'=rho^post2, x^0'=x^post2, retpp^0'=retpp^post2, rhop^0'=rhop^post2, (-x^post2+x^0 == 0 /\ retp^post2 == 0 /\ rhop^0-rhop^post2 == 0 /\ retpp^0 <= 0 /\ xp^0-xp^post2 == 0 /\ retpp^0-retpp^post2 == 0 /\ rho^0-rho^post2 == 0), cost: 1 3: l2 -> l3 : retp^0'=retp^post3, xp^0'=xp^post3, rho^0'=rho^post3, x^0'=x^post3, retpp^0'=retpp^post3, rhop^0'=rhop^post3, (-1+retp^post3 == 0 /\ -rhop^post3+rhop^0 == 0 /\ xp^0-xp^post3 == 0 /\ -x^post3+x^0 == 0 /\ rho^0-rho^post3 == 0 /\ -retpp^post3+retpp^0 == 0), cost: 1 4: l2 -> l0 : retp^0'=retp^post4, xp^0'=xp^post4, rho^0'=rho^post4, x^0'=x^post4, retpp^0'=retpp^post4, rhop^0'=rhop^post4, (0 == 0 /\ 1-rhop^post4 <= 0 /\ retp^0-retp^post4 == 0 /\ xp^0-xp^post4 == 0 /\ rho^0-rho^post4 == 0 /\ -x^post4+x^0 == 0 /\ -retpp^post4+retpp^0 == 0), cost: 1 8: l3 -> l5 : retp^0'=retp^post8, xp^0'=xp^post8, rho^0'=rho^post8, x^0'=x^post8, retpp^0'=retpp^post8, rhop^0'=rhop^post8, (retp^0 <= 0 /\ rhop^0-rhop^post8 == 0 /\ -x^post8+x^0 == 0 /\ xp^0-xp^post8 == 0 /\ rho^0-rho^post8 == 0 /\ -retpp^post8+retpp^0 == 0 /\ retp^0-retp^post8 == 0), cost: 1 7: l4 -> l1 : retp^0'=retp^post7, xp^0'=xp^post7, rho^0'=rho^post7, x^0'=x^post7, retpp^0'=retpp^post7, rhop^0'=rhop^post7, (retp^0-retp^post7 == 0 /\ -x^post7+xp^post7 == 0 /\ -2+x^post7 == 0 /\ rhop^post7-rho^0 == 0 /\ retpp^0-retpp^post7 == 0 /\ rho^0-rho^post7 == 0), cost: 1 9: l6 -> l4 : retp^0'=retp^post9, xp^0'=xp^post9, rho^0'=rho^post9, x^0'=x^post9, retpp^0'=retpp^post9, rhop^0'=rhop^post9, (xp^0-xp^post9 == 0 /\ -x^post9+x^0 == 0 /\ -retpp^post9+retpp^0 == 0 /\ rho^0-rho^post9 == 0 /\ retp^0-retp^post9 == 0 /\ -rhop^post9+rhop^0 == 0), cost: 1 Removed unreachable rules and leafs Start location: l6 0: l0 -> l1 : retp^0'=retp^post0, xp^0'=xp^post0, rho^0'=rho^post0, x^0'=x^post0, retpp^0'=retpp^post0, rhop^0'=rhop^post0, (-rho^post0+rho^0 == 0 /\ -rhop^post0+rhop^0 == 0 /\ -1-xp^0+xp^post0 == 0 /\ retp^0-retp^post0 == 0 /\ retpp^0-retpp^post0 == 0 /\ -x^post0+x^0 == 0 /\ 1-rhop^0 <= 0), cost: 1 1: l0 -> l1 : retp^0'=retp^post1, xp^0'=xp^post1, rho^0'=rho^post1, x^0'=x^post1, retpp^0'=retpp^post1, rhop^0'=rhop^post1, (retpp^0-retpp^post1 == 0 /\ retp^0-retp^post1 == 0 /\ -rhop^post1+rhop^0 == 0 /\ 1-xp^0+xp^post1 == 0 /\ rhop^0 <= 0 /\ x^0-x^post1 == 0 /\ -rho^post1+rho^0 == 0), cost: 1 5: l1 -> l2 : retp^0'=retp^post5, xp^0'=xp^post5, rho^0'=rho^post5, x^0'=x^post5, retpp^0'=retpp^post5, rhop^0'=rhop^post5, (-rhop^post5+rhop^0 == 0 /\ retpp^post5 == 0 /\ retp^0-retp^post5 == 0 /\ -1+xp^0 <= 0 /\ xp^0-xp^post5 == 0 /\ x^0-x^post5 == 0 /\ rho^0-rho^post5 == 0), cost: 1 6: l1 -> l2 : retp^0'=retp^post6, xp^0'=xp^post6, rho^0'=rho^post6, x^0'=x^post6, retpp^0'=retpp^post6, rhop^0'=rhop^post6, (xp^0-xp^post6 == 0 /\ 2-xp^0 <= 0 /\ retp^0-retp^post6 == 0 /\ x^0-x^post6 == 0 /\ -rho^post6+rho^0 == 0 /\ -rhop^post6+rhop^0 == 0 /\ -1+retpp^post6 == 0), cost: 1 4: l2 -> l0 : retp^0'=retp^post4, xp^0'=xp^post4, rho^0'=rho^post4, x^0'=x^post4, retpp^0'=retpp^post4, rhop^0'=rhop^post4, (0 == 0 /\ 1-rhop^post4 <= 0 /\ retp^0-retp^post4 == 0 /\ xp^0-xp^post4 == 0 /\ rho^0-rho^post4 == 0 /\ -x^post4+x^0 == 0 /\ -retpp^post4+retpp^0 == 0), cost: 1 7: l4 -> l1 : retp^0'=retp^post7, xp^0'=xp^post7, rho^0'=rho^post7, x^0'=x^post7, retpp^0'=retpp^post7, rhop^0'=rhop^post7, (retp^0-retp^post7 == 0 /\ -x^post7+xp^post7 == 0 /\ -2+x^post7 == 0 /\ rhop^post7-rho^0 == 0 /\ retpp^0-retpp^post7 == 0 /\ rho^0-rho^post7 == 0), cost: 1 9: l6 -> l4 : retp^0'=retp^post9, xp^0'=xp^post9, rho^0'=rho^post9, x^0'=x^post9, retpp^0'=retpp^post9, rhop^0'=rhop^post9, (xp^0-xp^post9 == 0 /\ -x^post9+x^0 == 0 /\ -retpp^post9+retpp^0 == 0 /\ rho^0-rho^post9 == 0 /\ retp^0-retp^post9 == 0 /\ -rhop^post9+rhop^0 == 0), cost: 1 Applied preprocessing Original rule: l0 -> l1 : retp^0'=retp^post0, xp^0'=xp^post0, rho^0'=rho^post0, x^0'=x^post0, retpp^0'=retpp^post0, rhop^0'=rhop^post0, (-rho^post0+rho^0 == 0 /\ -rhop^post0+rhop^0 == 0 /\ -1-xp^0+xp^post0 == 0 /\ retp^0-retp^post0 == 0 /\ retpp^0-retpp^post0 == 0 /\ -x^post0+x^0 == 0 /\ 1-rhop^0 <= 0), cost: 1 New rule: l0 -> l1 : xp^0'=1+xp^0, -1+rhop^0 >= 0, cost: 1 Applied preprocessing Original rule: l0 -> l1 : retp^0'=retp^post1, xp^0'=xp^post1, rho^0'=rho^post1, x^0'=x^post1, retpp^0'=retpp^post1, rhop^0'=rhop^post1, (retpp^0-retpp^post1 == 0 /\ retp^0-retp^post1 == 0 /\ -rhop^post1+rhop^0 == 0 /\ 1-xp^0+xp^post1 == 0 /\ rhop^0 <= 0 /\ x^0-x^post1 == 0 /\ -rho^post1+rho^0 == 0), cost: 1 New rule: l0 -> l1 : xp^0'=-1+xp^0, rhop^0 <= 0, cost: 1 Applied preprocessing Original rule: l2 -> l0 : retp^0'=retp^post4, xp^0'=xp^post4, rho^0'=rho^post4, x^0'=x^post4, retpp^0'=retpp^post4, rhop^0'=rhop^post4, (0 == 0 /\ 1-rhop^post4 <= 0 /\ retp^0-retp^post4 == 0 /\ xp^0-xp^post4 == 0 /\ rho^0-rho^post4 == 0 /\ -x^post4+x^0 == 0 /\ -retpp^post4+retpp^0 == 0), cost: 1 New rule: l2 -> l0 : rhop^0'=rhop^post4, -1+rhop^post4 >= 0, cost: 1 Applied preprocessing Original rule: l1 -> l2 : retp^0'=retp^post5, xp^0'=xp^post5, rho^0'=rho^post5, x^0'=x^post5, retpp^0'=retpp^post5, rhop^0'=rhop^post5, (-rhop^post5+rhop^0 == 0 /\ retpp^post5 == 0 /\ retp^0-retp^post5 == 0 /\ -1+xp^0 <= 0 /\ xp^0-xp^post5 == 0 /\ x^0-x^post5 == 0 /\ rho^0-rho^post5 == 0), cost: 1 New rule: l1 -> l2 : retpp^0'=0, -1+xp^0 <= 0, cost: 1 Applied preprocessing Original rule: l1 -> l2 : retp^0'=retp^post6, xp^0'=xp^post6, rho^0'=rho^post6, x^0'=x^post6, retpp^0'=retpp^post6, rhop^0'=rhop^post6, (xp^0-xp^post6 == 0 /\ 2-xp^0 <= 0 /\ retp^0-retp^post6 == 0 /\ x^0-x^post6 == 0 /\ -rho^post6+rho^0 == 0 /\ -rhop^post6+rhop^0 == 0 /\ -1+retpp^post6 == 0), cost: 1 New rule: l1 -> l2 : retpp^0'=1, -2+xp^0 >= 0, cost: 1 Applied preprocessing Original rule: l4 -> l1 : retp^0'=retp^post7, xp^0'=xp^post7, rho^0'=rho^post7, x^0'=x^post7, retpp^0'=retpp^post7, rhop^0'=rhop^post7, (retp^0-retp^post7 == 0 /\ -x^post7+xp^post7 == 0 /\ -2+x^post7 == 0 /\ rhop^post7-rho^0 == 0 /\ retpp^0-retpp^post7 == 0 /\ rho^0-rho^post7 == 0), cost: 1 New rule: l4 -> l1 : xp^0'=2, x^0'=2, rhop^0'=rho^0, TRUE, cost: 1 Applied preprocessing Original rule: l6 -> l4 : retp^0'=retp^post9, xp^0'=xp^post9, rho^0'=rho^post9, x^0'=x^post9, retpp^0'=retpp^post9, rhop^0'=rhop^post9, (xp^0-xp^post9 == 0 /\ -x^post9+x^0 == 0 /\ -retpp^post9+retpp^0 == 0 /\ rho^0-rho^post9 == 0 /\ retp^0-retp^post9 == 0 /\ -rhop^post9+rhop^0 == 0), cost: 1 New rule: l6 -> l4 : TRUE, cost: 1 Simplified rules Start location: l6 10: l0 -> l1 : xp^0'=1+xp^0, -1+rhop^0 >= 0, cost: 1 11: l0 -> l1 : xp^0'=-1+xp^0, rhop^0 <= 0, cost: 1 13: l1 -> l2 : retpp^0'=0, -1+xp^0 <= 0, cost: 1 14: l1 -> l2 : retpp^0'=1, -2+xp^0 >= 0, cost: 1 12: l2 -> l0 : rhop^0'=rhop^post4, -1+rhop^post4 >= 0, cost: 1 15: l4 -> l1 : xp^0'=2, x^0'=2, rhop^0'=rho^0, TRUE, cost: 1 16: l6 -> l4 : TRUE, cost: 1 Eliminating location l4 by chaining: Applied chaining First rule: l6 -> l4 : TRUE, cost: 1 Second rule: l4 -> l1 : xp^0'=2, x^0'=2, rhop^0'=rho^0, TRUE, cost: 1 New rule: l6 -> l1 : xp^0'=2, x^0'=2, rhop^0'=rho^0, TRUE, cost: 2 Applied deletion Removed the following rules: 15 16 Eliminated locations on linear paths Start location: l6 10: l0 -> l1 : xp^0'=1+xp^0, -1+rhop^0 >= 0, cost: 1 11: l0 -> l1 : xp^0'=-1+xp^0, rhop^0 <= 0, cost: 1 13: l1 -> l2 : retpp^0'=0, -1+xp^0 <= 0, cost: 1 14: l1 -> l2 : retpp^0'=1, -2+xp^0 >= 0, cost: 1 12: l2 -> l0 : rhop^0'=rhop^post4, -1+rhop^post4 >= 0, cost: 1 17: l6 -> l1 : xp^0'=2, x^0'=2, rhop^0'=rho^0, TRUE, cost: 2 Eliminating location l2 by chaining: Applied chaining First rule: l1 -> l2 : retpp^0'=0, -1+xp^0 <= 0, cost: 1 Second rule: l2 -> l0 : rhop^0'=rhop^post4, -1+rhop^post4 >= 0, cost: 1 New rule: l1 -> l0 : retpp^0'=0, rhop^0'=rhop^post4, (-1+rhop^post4 >= 0 /\ -1+xp^0 <= 0), cost: 2 Applied chaining First rule: l1 -> l2 : retpp^0'=1, -2+xp^0 >= 0, cost: 1 Second rule: l2 -> l0 : rhop^0'=rhop^post4, -1+rhop^post4 >= 0, cost: 1 New rule: l1 -> l0 : retpp^0'=1, rhop^0'=rhop^post4, (-1+rhop^post4 >= 0 /\ -2+xp^0 >= 0), cost: 2 Applied deletion Removed the following rules: 12 13 14 Eliminated locations on tree-shaped paths Start location: l6 10: l0 -> l1 : xp^0'=1+xp^0, -1+rhop^0 >= 0, cost: 1 11: l0 -> l1 : xp^0'=-1+xp^0, rhop^0 <= 0, cost: 1 18: l1 -> l0 : retpp^0'=0, rhop^0'=rhop^post4, (-1+rhop^post4 >= 0 /\ -1+xp^0 <= 0), cost: 2 19: l1 -> l0 : retpp^0'=1, rhop^0'=rhop^post4, (-1+rhop^post4 >= 0 /\ -2+xp^0 >= 0), cost: 2 17: l6 -> l1 : xp^0'=2, x^0'=2, rhop^0'=rho^0, TRUE, cost: 2 Eliminating location l0 by chaining: Applied chaining First rule: l1 -> l0 : retpp^0'=0, rhop^0'=rhop^post4, (-1+rhop^post4 >= 0 /\ -1+xp^0 <= 0), cost: 2 Second rule: l0 -> l1 : xp^0'=1+xp^0, -1+rhop^0 >= 0, cost: 1 New rule: l1 -> l1 : xp^0'=1+xp^0, retpp^0'=0, rhop^0'=rhop^post4, (-1+rhop^post4 >= 0 /\ -1+xp^0 <= 0), cost: 3 Applied chaining First rule: l1 -> l0 : retpp^0'=1, rhop^0'=rhop^post4, (-1+rhop^post4 >= 0 /\ -2+xp^0 >= 0), cost: 2 Second rule: l0 -> l1 : xp^0'=1+xp^0, -1+rhop^0 >= 0, cost: 1 New rule: l1 -> l1 : xp^0'=1+xp^0, retpp^0'=1, rhop^0'=rhop^post4, (-1+rhop^post4 >= 0 /\ -2+xp^0 >= 0), cost: 3 Applied deletion Removed the following rules: 10 11 18 19 Eliminated locations on tree-shaped paths Start location: l6 20: l1 -> l1 : xp^0'=1+xp^0, retpp^0'=0, rhop^0'=rhop^post4, (-1+rhop^post4 >= 0 /\ -1+xp^0 <= 0), cost: 3 21: l1 -> l1 : xp^0'=1+xp^0, retpp^0'=1, rhop^0'=rhop^post4, (-1+rhop^post4 >= 0 /\ -2+xp^0 >= 0), cost: 3 17: l6 -> l1 : xp^0'=2, x^0'=2, rhop^0'=rho^0, TRUE, cost: 2 Applied acceleration Original rule: l1 -> l1 : xp^0'=1+xp^0, retpp^0'=0, rhop^0'=rhop^post4, (-1+rhop^post4 >= 0 /\ -1+xp^0 <= 0), cost: 3 New rule: l1 -> l1 : xp^0'=xp^0+n1, retpp^0'=0, rhop^0'=rhop^post4, (-1+rhop^post4 >= 0 /\ -1+n1 >= 0 /\ 2-xp^0-n1 >= 0), cost: 3*n1 Applied instantiation Original rule: l1 -> l1 : xp^0'=xp^0+n1, retpp^0'=0, rhop^0'=rhop^post4, (-1+rhop^post4 >= 0 /\ -1+n1 >= 0 /\ 2-xp^0-n1 >= 0), cost: 3*n1 New rule: l1 -> l1 : xp^0'=2, retpp^0'=0, rhop^0'=rhop^post4, (0 >= 0 /\ -1+rhop^post4 >= 0 /\ 1-xp^0 >= 0), cost: 6-3*xp^0 Applied nonterm Original rule: l1 -> l1 : xp^0'=1+xp^0, retpp^0'=1, rhop^0'=rhop^post4, (-1+rhop^post4 >= 0 /\ -2+xp^0 >= 0), cost: 3 New rule: l1 -> [7] : (-1+rhop^post4 >= 0 /\ -2+xp^0 >= 0), cost: NONTERM Applied acceleration Original rule: l1 -> l1 : xp^0'=1+xp^0, retpp^0'=1, rhop^0'=rhop^post4, (-1+rhop^post4 >= 0 /\ -2+xp^0 >= 0), cost: 3 New rule: l1 -> l1 : xp^0'=xp^0+n3, retpp^0'=1, rhop^0'=rhop^post4, (-1+rhop^post4 >= 0 /\ -2+xp^0 >= 0), cost: 3*n3 Applied simplification Original rule: l1 -> l1 : xp^0'=2, retpp^0'=0, rhop^0'=rhop^post4, (0 >= 0 /\ -1+rhop^post4 >= 0 /\ 1-xp^0 >= 0), cost: 6-3*xp^0 New rule: l1 -> l1 : xp^0'=2, retpp^0'=0, rhop^0'=rhop^post4, (-1+rhop^post4 >= 0 /\ -1+xp^0 <= 0), cost: 6-3*xp^0 Applied deletion Removed the following rules: 20 21 Accelerated simple loops Start location: l6 23: l1 -> [7] : (-1+rhop^post4 >= 0 /\ -2+xp^0 >= 0), cost: NONTERM 24: l1 -> l1 : xp^0'=xp^0+n3, retpp^0'=1, rhop^0'=rhop^post4, (-1+rhop^post4 >= 0 /\ -2+xp^0 >= 0), cost: 3*n3 25: l1 -> l1 : xp^0'=2, retpp^0'=0, rhop^0'=rhop^post4, (-1+rhop^post4 >= 0 /\ -1+xp^0 <= 0), cost: 6-3*xp^0 17: l6 -> l1 : xp^0'=2, x^0'=2, rhop^0'=rho^0, TRUE, cost: 2 Applied chaining First rule: l6 -> l1 : xp^0'=2, x^0'=2, rhop^0'=rho^0, TRUE, cost: 2 Second rule: l1 -> [7] : (-1+rhop^post4 >= 0 /\ -2+xp^0 >= 0), cost: NONTERM New rule: l6 -> [7] : 0 >= 0, cost: NONTERM Applied chaining First rule: l6 -> l1 : xp^0'=2, x^0'=2, rhop^0'=rho^0, TRUE, cost: 2 Second rule: l1 -> l1 : xp^0'=xp^0+n3, retpp^0'=1, rhop^0'=rhop^post4, (-1+rhop^post4 >= 0 /\ -2+xp^0 >= 0), cost: 3*n3 New rule: l6 -> l1 : xp^0'=2+n3, x^0'=2, retpp^0'=1, rhop^0'=rhop^post4, -1+rhop^post4 >= 0, cost: 2+3*n3 Applied deletion Removed the following rules: 23 24 25 Chained accelerated rules with incoming rules Start location: l6 17: l6 -> l1 : xp^0'=2, x^0'=2, rhop^0'=rho^0, TRUE, cost: 2 26: l6 -> [7] : 0 >= 0, cost: NONTERM 27: l6 -> l1 : xp^0'=2+n3, x^0'=2, retpp^0'=1, rhop^0'=rhop^post4, -1+rhop^post4 >= 0, cost: 2+3*n3 Removed unreachable locations and irrelevant leafs Start location: l6 26: l6 -> [7] : 0 >= 0, cost: NONTERM Computing asymptotic complexity Proved nontermination of rule 26 via SMT. Proved the following lower bound Complexity: Nonterm Cpx degree: Nonterm Solved cost: NONTERM Rule cost: NONTERM Rule guard: 0 >= 0