WORST_CASE(Omega(0),?) Initial ITS Start location: l4 0: l0 -> l1 : i^0'=i^post0, n^0'=n^post0, j^0'=j^post0, (n^0-n^post0 == 0 /\ -j^post0+j^0 == 0 /\ -1-i^0+i^post0 == 0 /\ i^0-j^0 <= 0), cost: 1 1: l0 -> l2 : i^0'=i^post1, n^0'=n^post1, j^0'=j^post1, (n^0-n^post1 == 0 /\ i^0-i^post1 == 0 /\ 1-i^0+j^0 <= 0 /\ -1-j^0+j^post1 == 0), cost: 1 3: l1 -> l0 : i^0'=i^post3, n^0'=n^post3, j^0'=j^post3, (1+i^0-n^0 <= 0 /\ j^post3 == 0 /\ i^0-i^post3 == 0 /\ n^0-n^post3 == 0), cost: 1 2: l2 -> l0 : i^0'=i^post2, n^0'=n^post2, j^0'=j^post2, (n^0-n^post2 == 0 /\ j^0-j^post2 == 0 /\ i^0-i^post2 == 0), cost: 1 4: l3 -> l1 : i^0'=i^post4, n^0'=n^post4, j^0'=j^post4, (i^post4 == 0 /\ n^0-n^post4 == 0 /\ j^0-j^post4 == 0), cost: 1 5: l4 -> l3 : i^0'=i^post5, n^0'=n^post5, j^0'=j^post5, (i^0-i^post5 == 0 /\ n^0-n^post5 == 0 /\ j^0-j^post5 == 0), cost: 1 Applied preprocessing Original rule: l0 -> l1 : i^0'=i^post0, n^0'=n^post0, j^0'=j^post0, (n^0-n^post0 == 0 /\ -j^post0+j^0 == 0 /\ -1-i^0+i^post0 == 0 /\ i^0-j^0 <= 0), cost: 1 New rule: l0 -> l1 : i^0'=1+i^0, i^0-j^0 <= 0, cost: 1 Applied preprocessing Original rule: l0 -> l2 : i^0'=i^post1, n^0'=n^post1, j^0'=j^post1, (n^0-n^post1 == 0 /\ i^0-i^post1 == 0 /\ 1-i^0+j^0 <= 0 /\ -1-j^0+j^post1 == 0), cost: 1 New rule: l0 -> l2 : j^0'=1+j^0, 1-i^0+j^0 <= 0, cost: 1 Applied preprocessing Original rule: l2 -> l0 : i^0'=i^post2, n^0'=n^post2, j^0'=j^post2, (n^0-n^post2 == 0 /\ j^0-j^post2 == 0 /\ i^0-i^post2 == 0), cost: 1 New rule: l2 -> l0 : TRUE, cost: 1 Applied preprocessing Original rule: l1 -> l0 : i^0'=i^post3, n^0'=n^post3, j^0'=j^post3, (1+i^0-n^0 <= 0 /\ j^post3 == 0 /\ i^0-i^post3 == 0 /\ n^0-n^post3 == 0), cost: 1 New rule: l1 -> l0 : j^0'=0, 1+i^0-n^0 <= 0, cost: 1 Applied preprocessing Original rule: l3 -> l1 : i^0'=i^post4, n^0'=n^post4, j^0'=j^post4, (i^post4 == 0 /\ n^0-n^post4 == 0 /\ j^0-j^post4 == 0), cost: 1 New rule: l3 -> l1 : i^0'=0, TRUE, cost: 1 Applied preprocessing Original rule: l4 -> l3 : i^0'=i^post5, n^0'=n^post5, j^0'=j^post5, (i^0-i^post5 == 0 /\ n^0-n^post5 == 0 /\ j^0-j^post5 == 0), cost: 1 New rule: l4 -> l3 : TRUE, cost: 1 Simplified rules Start location: l4 6: l0 -> l1 : i^0'=1+i^0, i^0-j^0 <= 0, cost: 1 7: l0 -> l2 : j^0'=1+j^0, 1-i^0+j^0 <= 0, cost: 1 9: l1 -> l0 : j^0'=0, 1+i^0-n^0 <= 0, cost: 1 8: l2 -> l0 : TRUE, cost: 1 10: l3 -> l1 : i^0'=0, TRUE, cost: 1 11: l4 -> l3 : TRUE, cost: 1 Eliminating location l3 by chaining: Applied chaining First rule: l4 -> l3 : TRUE, cost: 1 Second rule: l3 -> l1 : i^0'=0, TRUE, cost: 1 New rule: l4 -> l1 : i^0'=0, TRUE, cost: 2 Applied deletion Removed the following rules: 10 11 Eliminating location l2 by chaining: Applied chaining First rule: l0 -> l2 : j^0'=1+j^0, 1-i^0+j^0 <= 0, cost: 1 Second rule: l2 -> l0 : TRUE, cost: 1 New rule: l0 -> l0 : j^0'=1+j^0, 1-i^0+j^0 <= 0, cost: 2 Applied deletion Removed the following rules: 7 8 Eliminated locations on linear paths Start location: l4 6: l0 -> l1 : i^0'=1+i^0, i^0-j^0 <= 0, cost: 1 13: l0 -> l0 : j^0'=1+j^0, 1-i^0+j^0 <= 0, cost: 2 9: l1 -> l0 : j^0'=0, 1+i^0-n^0 <= 0, cost: 1 12: l4 -> l1 : i^0'=0, TRUE, cost: 2 Applied acceleration Original rule: l0 -> l0 : j^0'=1+j^0, 1-i^0+j^0 <= 0, cost: 2 New rule: l0 -> l0 : j^0'=n0+j^0, (n0 >= 0 /\ i^0-n0-j^0 >= 0), cost: 2*n0 Applied instantiation Original rule: l0 -> l0 : j^0'=n0+j^0, (n0 >= 0 /\ i^0-n0-j^0 >= 0), cost: 2*n0 New rule: l0 -> l0 : j^0'=i^0, (0 >= 0 /\ i^0-j^0 >= 0), cost: 2*i^0-2*j^0 Applied simplification Original rule: l0 -> l0 : j^0'=i^0, (0 >= 0 /\ i^0-j^0 >= 0), cost: 2*i^0-2*j^0 New rule: l0 -> l0 : j^0'=i^0, i^0-j^0 >= 0, cost: 2*i^0-2*j^0 Applied deletion Removed the following rules: 13 Accelerated simple loops Start location: l4 6: l0 -> l1 : i^0'=1+i^0, i^0-j^0 <= 0, cost: 1 15: l0 -> l0 : j^0'=i^0, i^0-j^0 >= 0, cost: 2*i^0-2*j^0 9: l1 -> l0 : j^0'=0, 1+i^0-n^0 <= 0, cost: 1 12: l4 -> l1 : i^0'=0, TRUE, cost: 2 Applied chaining First rule: l1 -> l0 : j^0'=0, 1+i^0-n^0 <= 0, cost: 1 Second rule: l0 -> l0 : j^0'=i^0, i^0-j^0 >= 0, cost: 2*i^0-2*j^0 New rule: l1 -> l0 : j^0'=i^0, (i^0 >= 0 /\ 1+i^0-n^0 <= 0), cost: 1+2*i^0 Applied deletion Removed the following rules: 15 Chained accelerated rules with incoming rules Start location: l4 6: l0 -> l1 : i^0'=1+i^0, i^0-j^0 <= 0, cost: 1 9: l1 -> l0 : j^0'=0, 1+i^0-n^0 <= 0, cost: 1 16: l1 -> l0 : j^0'=i^0, (i^0 >= 0 /\ 1+i^0-n^0 <= 0), cost: 1+2*i^0 12: l4 -> l1 : i^0'=0, TRUE, cost: 2 Eliminating location l0 by chaining: Applied chaining First rule: l1 -> l0 : j^0'=0, 1+i^0-n^0 <= 0, cost: 1 Second rule: l0 -> l1 : i^0'=1+i^0, i^0-j^0 <= 0, cost: 1 New rule: l1 -> l1 : i^0'=1+i^0, j^0'=0, (i^0 <= 0 /\ 1+i^0-n^0 <= 0), cost: 2 Applied chaining First rule: l1 -> l0 : j^0'=i^0, (i^0 >= 0 /\ 1+i^0-n^0 <= 0), cost: 1+2*i^0 Second rule: l0 -> l1 : i^0'=1+i^0, i^0-j^0 <= 0, cost: 1 New rule: l1 -> l1 : i^0'=1+i^0, j^0'=i^0, (0 <= 0 /\ i^0 >= 0 /\ 1+i^0-n^0 <= 0), cost: 2+2*i^0 Applied simplification Original rule: l1 -> l1 : i^0'=1+i^0, j^0'=i^0, (0 <= 0 /\ i^0 >= 0 /\ 1+i^0-n^0 <= 0), cost: 2+2*i^0 New rule: l1 -> l1 : i^0'=1+i^0, j^0'=i^0, (i^0 >= 0 /\ 1+i^0-n^0 <= 0), cost: 2+2*i^0 Applied deletion Removed the following rules: 6 9 16 Eliminated locations on tree-shaped paths Start location: l4 17: l1 -> l1 : i^0'=1+i^0, j^0'=0, (i^0 <= 0 /\ 1+i^0-n^0 <= 0), cost: 2 18: l1 -> l1 : i^0'=1+i^0, j^0'=i^0, (i^0 >= 0 /\ 1+i^0-n^0 <= 0), cost: 2+2*i^0 12: l4 -> l1 : i^0'=0, TRUE, cost: 2 Applied acceleration Original rule: l1 -> l1 : i^0'=1+i^0, j^0'=0, (i^0 <= 0 /\ 1+i^0-n^0 <= 0), cost: 2 New rule: l1 -> l1 : i^0'=i^0+n4, j^0'=0, (-1+n4 >= 0 /\ -i^0+n^0-n4 >= 0 /\ 1-i^0-n4 >= 0), cost: 2*n4 Applied instantiation Original rule: l1 -> l1 : i^0'=i^0+n4, j^0'=0, (-1+n4 >= 0 /\ -i^0+n^0-n4 >= 0 /\ 1-i^0-n4 >= 0), cost: 2*n4 New rule: l1 -> l1 : i^0'=1, j^0'=0, (0 >= 0 /\ -1+n^0 >= 0 /\ -i^0 >= 0), cost: 2-2*i^0 Applied instantiation Original rule: l1 -> l1 : i^0'=i^0+n4, j^0'=0, (-1+n4 >= 0 /\ -i^0+n^0-n4 >= 0 /\ 1-i^0-n4 >= 0), cost: 2*n4 New rule: l1 -> l1 : i^0'=n^0, j^0'=0, (0 >= 0 /\ -1-i^0+n^0 >= 0 /\ 1-n^0 >= 0), cost: -2*i^0+2*n^0 Applied acceleration Original rule: l1 -> l1 : i^0'=1+i^0, j^0'=i^0, (i^0 >= 0 /\ 1+i^0-n^0 <= 0), cost: 2+2*i^0 New rule: l1 -> l1 : i^0'=i^0+n7, j^0'=-1+i^0+n7, (i^0 >= 0 /\ -i^0+n^0-n7 >= 0 /\ -1+n7 >= 0), cost: n7+n7^2+2*i^0*n7 Applied instantiation Original rule: l1 -> l1 : i^0'=i^0+n7, j^0'=-1+i^0+n7, (i^0 >= 0 /\ -i^0+n^0-n7 >= 0 /\ -1+n7 >= 0), cost: n7+n7^2+2*i^0*n7 New rule: l1 -> l1 : i^0'=n^0, j^0'=-1+n^0, (0 >= 0 /\ i^0 >= 0 /\ -1-i^0+n^0 >= 0), cost: -i^0-2*i^0*(i^0-n^0)+n^0+(i^0-n^0)^2 Applied simplification Original rule: l1 -> l1 : i^0'=1, j^0'=0, (0 >= 0 /\ -1+n^0 >= 0 /\ -i^0 >= 0), cost: 2-2*i^0 New rule: l1 -> l1 : i^0'=1, j^0'=0, (i^0 <= 0 /\ -1+n^0 >= 0), cost: 2-2*i^0 Applied simplification Original rule: l1 -> l1 : i^0'=n^0, j^0'=0, (0 >= 0 /\ -1-i^0+n^0 >= 0 /\ 1-n^0 >= 0), cost: -2*i^0+2*n^0 New rule: l1 -> l1 : i^0'=n^0, j^0'=0, (-1-i^0+n^0 >= 0 /\ -1+n^0 <= 0), cost: -2*i^0+2*n^0 Applied simplification Original rule: l1 -> l1 : i^0'=n^0, j^0'=-1+n^0, (0 >= 0 /\ i^0 >= 0 /\ -1-i^0+n^0 >= 0), cost: -i^0-2*i^0*(i^0-n^0)+n^0+(i^0-n^0)^2 New rule: l1 -> l1 : i^0'=n^0, j^0'=-1+n^0, (i^0 >= 0 /\ -1-i^0+n^0 >= 0), cost: -i^0-2*i^0*(i^0-n^0)+n^0+(i^0-n^0)^2 Applied deletion Removed the following rules: 17 18 Accelerated simple loops Start location: l4 22: l1 -> l1 : i^0'=1, j^0'=0, (i^0 <= 0 /\ -1+n^0 >= 0), cost: 2-2*i^0 23: l1 -> l1 : i^0'=n^0, j^0'=0, (-1-i^0+n^0 >= 0 /\ -1+n^0 <= 0), cost: -2*i^0+2*n^0 24: l1 -> l1 : i^0'=n^0, j^0'=-1+n^0, (i^0 >= 0 /\ -1-i^0+n^0 >= 0), cost: -i^0-2*i^0*(i^0-n^0)+n^0+(i^0-n^0)^2 12: l4 -> l1 : i^0'=0, TRUE, cost: 2 Applied chaining First rule: l4 -> l1 : i^0'=0, TRUE, cost: 2 Second rule: l1 -> l1 : i^0'=1, j^0'=0, (i^0 <= 0 /\ -1+n^0 >= 0), cost: 2-2*i^0 New rule: l4 -> l1 : i^0'=1, j^0'=0, -1+n^0 >= 0, cost: 4 Applied chaining First rule: l4 -> l1 : i^0'=0, TRUE, cost: 2 Second rule: l1 -> l1 : i^0'=n^0, j^0'=0, (-1-i^0+n^0 >= 0 /\ -1+n^0 <= 0), cost: -2*i^0+2*n^0 New rule: l4 -> l1 : i^0'=n^0, j^0'=0, -1+n^0 == 0, cost: 2+2*n^0 Applied chaining First rule: l4 -> l1 : i^0'=0, TRUE, cost: 2 Second rule: l1 -> l1 : i^0'=n^0, j^0'=-1+n^0, (i^0 >= 0 /\ -1-i^0+n^0 >= 0), cost: -i^0-2*i^0*(i^0-n^0)+n^0+(i^0-n^0)^2 New rule: l4 -> l1 : i^0'=n^0, j^0'=-1+n^0, -1+n^0 >= 0, cost: 2+n^0+n^0^2 Applied deletion Removed the following rules: 22 23 24 Chained accelerated rules with incoming rules Start location: l4 12: l4 -> l1 : i^0'=0, TRUE, cost: 2 25: l4 -> l1 : i^0'=1, j^0'=0, -1+n^0 >= 0, cost: 4 26: l4 -> l1 : i^0'=n^0, j^0'=0, -1+n^0 == 0, cost: 2+2*n^0 27: l4 -> l1 : i^0'=n^0, j^0'=-1+n^0, -1+n^0 >= 0, cost: 2+n^0+n^0^2 Removed unreachable locations and irrelevant leafs Start location: l4 Computing asymptotic complexity Proved the following lower bound Complexity: Unknown Cpx degree: ? Solved cost: 0 Rule cost: 0