WORST_CASE(Omega(1),?) ### Pre-processing the ITS problem ### Initial linear ITS problem Start location: __init 0: f1_0_main_Load -> f161_0_main_LT : arg1'=arg1P_1, arg2'=arg2P_1, [ arg2>-1 && arg1P_1>-1 && arg1>0 ], cost: 1 1: f161_0_main_LT -> f212_0_main_LE : arg1'=arg1P_2, arg2'=arg2P_2, [ arg1>-1 && arg1==arg1P_2 && 1==arg2P_2 ], cost: 1 2: f212_0_main_LE -> f161_0_main_LT : arg1'=arg1P_3, arg2'=arg2P_3, [ arg2>=arg1 && -1+arg1==arg1P_3 ], cost: 1 3: f212_0_main_LE -> f212_0_main_LE : arg1'=arg1P_4, arg2'=arg2P_4, [ arg2>0 && arg2 f1_0_main_Load : arg1'=arg1P_5, arg2'=arg2P_5, [], cost: 1 Checking for constant complexity: The following rule is satisfiable with cost >= 1, yielding constant complexity: 4: __init -> f1_0_main_Load : arg1'=arg1P_5, arg2'=arg2P_5, [], cost: 1 Simplified all rules, resulting in: Start location: __init 0: f1_0_main_Load -> f161_0_main_LT : arg1'=arg1P_1, arg2'=arg2P_1, [ arg2>-1 && arg1P_1>-1 && arg1>0 ], cost: 1 1: f161_0_main_LT -> f212_0_main_LE : arg2'=1, [ arg1>-1 ], cost: 1 2: f212_0_main_LE -> f161_0_main_LT : arg1'=-1+arg1, arg2'=arg2P_3, [ arg2>=arg1 ], cost: 1 3: f212_0_main_LE -> f212_0_main_LE : arg2'=2*arg2, [ arg2>0 && arg2 f1_0_main_Load : arg1'=arg1P_5, arg2'=arg2P_5, [], cost: 1 ### Simplification by acceleration and chaining ### Accelerating simple loops of location 2. Accelerating the following rules: 3: f212_0_main_LE -> f212_0_main_LE : arg2'=2*arg2, [ arg2>0 && arg2 f161_0_main_LT : arg1'=arg1P_1, arg2'=arg2P_1, [ arg2>-1 && arg1P_1>-1 && arg1>0 ], cost: 1 1: f161_0_main_LT -> f212_0_main_LE : arg2'=1, [ arg1>-1 ], cost: 1 2: f212_0_main_LE -> f161_0_main_LT : arg1'=-1+arg1, arg2'=arg2P_3, [ arg2>=arg1 ], cost: 1 5: f212_0_main_LE -> f212_0_main_LE : arg2'=arg2*2^k, [ arg2>0 && k>=0 && arg2*2^(-1+k) f1_0_main_Load : arg1'=arg1P_5, arg2'=arg2P_5, [], cost: 1 Chained accelerated rules (with incoming rules): Start location: __init 0: f1_0_main_Load -> f161_0_main_LT : arg1'=arg1P_1, arg2'=arg2P_1, [ arg2>-1 && arg1P_1>-1 && arg1>0 ], cost: 1 1: f161_0_main_LT -> f212_0_main_LE : arg2'=1, [ arg1>-1 ], cost: 1 6: f161_0_main_LT -> f212_0_main_LE : arg2'=2^k, [ arg1>-1 && k>=0 && 2^(-1+k) f161_0_main_LT : arg1'=-1+arg1, arg2'=arg2P_3, [ arg2>=arg1 ], cost: 1 4: __init -> f1_0_main_Load : arg1'=arg1P_5, arg2'=arg2P_5, [], cost: 1 Eliminated locations (on linear paths): Start location: __init 1: f161_0_main_LT -> f212_0_main_LE : arg2'=1, [ arg1>-1 ], cost: 1 6: f161_0_main_LT -> f212_0_main_LE : arg2'=2^k, [ arg1>-1 && k>=0 && 2^(-1+k) f161_0_main_LT : arg1'=-1+arg1, arg2'=arg2P_3, [ arg2>=arg1 ], cost: 1 7: __init -> f161_0_main_LT : arg1'=arg1P_1, arg2'=arg2P_1, [ arg2P_5>-1 && arg1P_1>-1 && arg1P_5>0 ], cost: 2 Eliminated locations (on tree-shaped paths): Start location: __init 8: f161_0_main_LT -> f161_0_main_LT : arg1'=-1+arg1, arg2'=arg2P_3, [ arg1>-1 && 1>=arg1 ], cost: 2 9: f161_0_main_LT -> f161_0_main_LT : arg1'=-1+arg1, arg2'=arg2P_3, [ arg1>-1 && k>=0 && 2^(-1+k)=arg1 ], cost: 2+k 7: __init -> f161_0_main_LT : arg1'=arg1P_1, arg2'=arg2P_1, [ arg2P_5>-1 && arg1P_1>-1 && arg1P_5>0 ], cost: 2 Accelerating simple loops of location 1. Accelerating the following rules: 8: f161_0_main_LT -> f161_0_main_LT : arg1'=-1+arg1, arg2'=arg2P_3, [ arg1>-1 && 1>=arg1 ], cost: 2 9: f161_0_main_LT -> f161_0_main_LT : arg1'=-1+arg1, arg2'=arg2P_3, [ arg1>-1 && k>=0 && 2^(-1+k)=arg1 ], cost: 2+k Accelerated rule 8 with backward acceleration, yielding the new rule 10. Failed to prove monotonicity of the guard of rule 9. [accelerate] Nesting with 2 inner and 2 outer candidates Removing the simple loops: 8. Accelerated all simple loops using metering functions (where possible): Start location: __init 9: f161_0_main_LT -> f161_0_main_LT : arg1'=-1+arg1, arg2'=arg2P_3, [ arg1>-1 && k>=0 && 2^(-1+k)=arg1 ], cost: 2+k 10: f161_0_main_LT -> f161_0_main_LT : arg1'=-1, arg2'=arg2P_3, [ 1>=arg1 && 1+arg1>=1 ], cost: 2+2*arg1 7: __init -> f161_0_main_LT : arg1'=arg1P_1, arg2'=arg2P_1, [ arg2P_5>-1 && arg1P_1>-1 && arg1P_5>0 ], cost: 2 Chained accelerated rules (with incoming rules): Start location: __init 7: __init -> f161_0_main_LT : arg1'=arg1P_1, arg2'=arg2P_1, [ arg2P_5>-1 && arg1P_1>-1 && arg1P_5>0 ], cost: 2 11: __init -> f161_0_main_LT : arg1'=-1+arg1P_1, arg2'=arg2P_3, [ arg1P_1>-1 && k>=0 && 2^(-1+k)=arg1P_1 ], cost: 4+k 12: __init -> f161_0_main_LT : arg1'=-1, arg2'=arg2P_3, [ arg1P_1>-1 && 1>=arg1P_1 ], cost: 4+2*arg1P_1 Removed unreachable locations (and leaf rules with constant cost): Start location: __init 11: __init -> f161_0_main_LT : arg1'=-1+arg1P_1, arg2'=arg2P_3, [ arg1P_1>-1 && k>=0 && 2^(-1+k)=arg1P_1 ], cost: 4+k 12: __init -> f161_0_main_LT : arg1'=-1, arg2'=arg2P_3, [ arg1P_1>-1 && 1>=arg1P_1 ], cost: 4+2*arg1P_1 ### Computing asymptotic complexity ### Fully simplified ITS problem Start location: __init 11: __init -> f161_0_main_LT : arg1'=-1+arg1P_1, arg2'=arg2P_3, [ arg1P_1>-1 && k>=0 && 2^(-1+k)=arg1P_1 ], cost: 4+k 12: __init -> f161_0_main_LT : arg1'=-1, arg2'=arg2P_3, [ arg1P_1>-1 && 1>=arg1P_1 ], cost: 4+2*arg1P_1 Computing asymptotic complexity for rule 12 Resulting cost 0 has complexity: Unknown Computing asymptotic complexity for rule 11 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),?)