WORST_CASE(Omega(1),?) ### Pre-processing the ITS problem ### Initial linear ITS problem Start location: __init 0: f1 -> f2 : arg1'=arg1P_1, arg2'=arg2P_1, [ arg2==arg2P_1 ], cost: 1 1: f2 -> f3 : arg1'=arg1P_2, arg2'=arg2P_2, [ arg1==arg1P_2 ], cost: 1 9: f3 -> f4 : arg1'=arg1P_10, arg2'=arg2P_10, [ arg1<5 && arg1==arg1P_10 && arg2==arg2P_10 ], cost: 1 11: f3 -> f10 : arg1'=arg1P_12, arg2'=arg2P_12, [ arg1>=5 && arg1==arg1P_12 && arg2==arg2P_12 ], cost: 1 2: f4 -> f5 : arg1'=arg1P_3, arg2'=arg2P_3, [ arg1==arg1P_3 && 0==arg2P_3 ], cost: 1 4: f5 -> f6 : arg1'=arg1P_5, arg2'=arg2P_5, [ arg1>2 && arg2<=9 && arg1==arg1P_5 && arg2==arg2P_5 ], cost: 1 6: f5 -> f8 : arg1'=arg1P_7, arg2'=arg2P_7, [ arg1<=2 && arg1==arg1P_7 && arg2==arg2P_7 ], cost: 1 7: f5 -> f8 : arg1'=arg1P_8, arg2'=arg2P_8, [ arg2>9 && arg1==arg1P_8 && arg2==arg2P_8 ], cost: 1 3: f6 -> f7 : arg1'=arg1P_4, arg2'=arg2P_4, [ arg2P_4==1+arg2 && arg1==arg1P_4 ], cost: 1 5: f7 -> f5 : arg1'=arg1P_6, arg2'=arg2P_6, [ arg1==arg1P_6 && arg2==arg2P_6 ], cost: 1 8: f8 -> f9 : arg1'=arg1P_9, arg2'=arg2P_9, [ arg1P_9==1+arg1 && arg2==arg2P_9 ], cost: 1 10: f9 -> f3 : arg1'=arg1P_11, arg2'=arg2P_11, [ arg1==arg1P_11 && arg2==arg2P_11 ], cost: 1 12: __init -> f1 : arg1'=arg1P_13, arg2'=arg2P_13, [], cost: 1 Checking for constant complexity: The following rule is satisfiable with cost >= 1, yielding constant complexity: 12: __init -> f1 : arg1'=arg1P_13, arg2'=arg2P_13, [], cost: 1 Removed unreachable and leaf rules: Start location: __init 0: f1 -> f2 : arg1'=arg1P_1, arg2'=arg2P_1, [ arg2==arg2P_1 ], cost: 1 1: f2 -> f3 : arg1'=arg1P_2, arg2'=arg2P_2, [ arg1==arg1P_2 ], cost: 1 9: f3 -> f4 : arg1'=arg1P_10, arg2'=arg2P_10, [ arg1<5 && arg1==arg1P_10 && arg2==arg2P_10 ], cost: 1 2: f4 -> f5 : arg1'=arg1P_3, arg2'=arg2P_3, [ arg1==arg1P_3 && 0==arg2P_3 ], cost: 1 4: f5 -> f6 : arg1'=arg1P_5, arg2'=arg2P_5, [ arg1>2 && arg2<=9 && arg1==arg1P_5 && arg2==arg2P_5 ], cost: 1 6: f5 -> f8 : arg1'=arg1P_7, arg2'=arg2P_7, [ arg1<=2 && arg1==arg1P_7 && arg2==arg2P_7 ], cost: 1 7: f5 -> f8 : arg1'=arg1P_8, arg2'=arg2P_8, [ arg2>9 && arg1==arg1P_8 && arg2==arg2P_8 ], cost: 1 3: f6 -> f7 : arg1'=arg1P_4, arg2'=arg2P_4, [ arg2P_4==1+arg2 && arg1==arg1P_4 ], cost: 1 5: f7 -> f5 : arg1'=arg1P_6, arg2'=arg2P_6, [ arg1==arg1P_6 && arg2==arg2P_6 ], cost: 1 8: f8 -> f9 : arg1'=arg1P_9, arg2'=arg2P_9, [ arg1P_9==1+arg1 && arg2==arg2P_9 ], cost: 1 10: f9 -> f3 : arg1'=arg1P_11, arg2'=arg2P_11, [ arg1==arg1P_11 && arg2==arg2P_11 ], cost: 1 12: __init -> f1 : arg1'=arg1P_13, arg2'=arg2P_13, [], cost: 1 Simplified all rules, resulting in: Start location: __init 0: f1 -> f2 : arg1'=arg1P_1, [], cost: 1 1: f2 -> f3 : arg2'=arg2P_2, [], cost: 1 9: f3 -> f4 : [ arg1<5 ], cost: 1 2: f4 -> f5 : arg2'=0, [], cost: 1 4: f5 -> f6 : [ arg1>2 && arg2<=9 ], cost: 1 6: f5 -> f8 : [ arg1<=2 ], cost: 1 7: f5 -> f8 : [ arg2>9 ], cost: 1 3: f6 -> f7 : arg2'=1+arg2, [], cost: 1 5: f7 -> f5 : [], cost: 1 8: f8 -> f9 : arg1'=1+arg1, [], cost: 1 10: f9 -> f3 : [], cost: 1 12: __init -> f1 : arg1'=arg1P_13, arg2'=arg2P_13, [], cost: 1 ### Simplification by acceleration and chaining ### Eliminated locations (on linear paths): Start location: __init 15: f3 -> f5 : arg2'=0, [ arg1<5 ], cost: 2 6: f5 -> f8 : [ arg1<=2 ], cost: 1 7: f5 -> f8 : [ arg2>9 ], cost: 1 17: f5 -> f5 : arg2'=1+arg2, [ arg1>2 && arg2<=9 ], cost: 3 18: f8 -> f3 : arg1'=1+arg1, [], cost: 2 14: __init -> f3 : arg1'=arg1P_1, arg2'=arg2P_2, [], cost: 3 Accelerating simple loops of location 4. Accelerating the following rules: 17: f5 -> f5 : arg2'=1+arg2, [ arg1>2 && arg2<=9 ], cost: 3 Accelerated rule 17 with backward acceleration, yielding the new rule 19. [accelerate] Nesting with 1 inner and 1 outer candidates Removing the simple loops: 17. Accelerated all simple loops using metering functions (where possible): Start location: __init 15: f3 -> f5 : arg2'=0, [ arg1<5 ], cost: 2 6: f5 -> f8 : [ arg1<=2 ], cost: 1 7: f5 -> f8 : [ arg2>9 ], cost: 1 19: f5 -> f5 : arg2'=10, [ arg1>2 && 10-arg2>=0 ], cost: 30-3*arg2 18: f8 -> f3 : arg1'=1+arg1, [], cost: 2 14: __init -> f3 : arg1'=arg1P_1, arg2'=arg2P_2, [], cost: 3 Chained accelerated rules (with incoming rules): Start location: __init 15: f3 -> f5 : arg2'=0, [ arg1<5 ], cost: 2 20: f3 -> f5 : arg2'=10, [ arg1<5 && arg1>2 ], cost: 32 6: f5 -> f8 : [ arg1<=2 ], cost: 1 7: f5 -> f8 : [ arg2>9 ], cost: 1 18: f8 -> f3 : arg1'=1+arg1, [], cost: 2 14: __init -> f3 : arg1'=arg1P_1, arg2'=arg2P_2, [], cost: 3 Eliminated locations (on tree-shaped paths): Start location: __init 21: f3 -> f8 : arg2'=0, [ arg1<=2 ], cost: 3 22: f3 -> f8 : arg2'=10, [ arg1<5 && arg1>2 ], cost: 33 18: f8 -> f3 : arg1'=1+arg1, [], cost: 2 14: __init -> f3 : arg1'=arg1P_1, arg2'=arg2P_2, [], cost: 3 Eliminated locations (on tree-shaped paths): Start location: __init 23: f3 -> f3 : arg1'=1+arg1, arg2'=0, [ arg1<=2 ], cost: 5 24: f3 -> f3 : arg1'=1+arg1, arg2'=10, [ arg1<5 && arg1>2 ], cost: 35 14: __init -> f3 : arg1'=arg1P_1, arg2'=arg2P_2, [], cost: 3 Accelerating simple loops of location 2. Accelerating the following rules: 23: f3 -> f3 : arg1'=1+arg1, arg2'=0, [ arg1<=2 ], cost: 5 24: f3 -> f3 : arg1'=1+arg1, arg2'=10, [ arg1<5 && arg1>2 ], cost: 35 Accelerated rule 23 with backward acceleration, yielding the new rule 25. Accelerated rule 24 with backward acceleration, yielding the new rule 26. [accelerate] Nesting with 2 inner and 2 outer candidates Removing the simple loops: 23 24. Accelerated all simple loops using metering functions (where possible): Start location: __init 25: f3 -> f3 : arg1'=3, arg2'=0, [ 3-arg1>=1 ], cost: 15-5*arg1 26: f3 -> f3 : arg1'=5, arg2'=10, [ arg1>2 && 5-arg1>=1 ], cost: 175-35*arg1 14: __init -> f3 : arg1'=arg1P_1, arg2'=arg2P_2, [], cost: 3 Chained accelerated rules (with incoming rules): Start location: __init 14: __init -> f3 : arg1'=arg1P_1, arg2'=arg2P_2, [], cost: 3 27: __init -> f3 : arg1'=3, arg2'=0, [ 3-arg1P_1>=1 ], cost: 18-5*arg1P_1 28: __init -> f3 : arg1'=5, arg2'=10, [ arg1P_1>2 && 5-arg1P_1>=1 ], cost: 178-35*arg1P_1 Removed unreachable locations (and leaf rules with constant cost): Start location: __init 27: __init -> f3 : arg1'=3, arg2'=0, [ 3-arg1P_1>=1 ], cost: 18-5*arg1P_1 28: __init -> f3 : arg1'=5, arg2'=10, [ arg1P_1>2 && 5-arg1P_1>=1 ], cost: 178-35*arg1P_1 ### Computing asymptotic complexity ### Fully simplified ITS problem Start location: __init 27: __init -> f3 : arg1'=3, arg2'=0, [ 3-arg1P_1>=1 ], cost: 18-5*arg1P_1 28: __init -> f3 : arg1'=5, arg2'=10, [ arg1P_1>2 && 5-arg1P_1>=1 ], cost: 178-35*arg1P_1 Computing asymptotic complexity for rule 27 Resulting cost 0 has complexity: Unknown Computing asymptotic complexity for rule 28 Resulting cost 0 has complexity: Unknown Obtained the following overall complexity (w.r.t. the length of the input n): Complexity: Constant Cpx degree: 0 Solved cost: 1 Rule cost: 1 Rule guard: [] WORST_CASE(Omega(1),?)