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