WORST_CASE(Omega(1),?) ### Pre-processing the ITS problem ### Initial linear ITS problem Start location: __init 0: f1_0_main_Load -> f127_0_eq_LE : arg1'=arg1P_1, arg2'=arg2P_1, [ arg1P_1>-1 && arg2>1 && arg2P_1>-1 && arg1>0 ], cost: 1 1: f127_0_eq_LE -> f127_0_eq_LE : arg1'=arg1P_2, arg2'=arg2P_2, [ arg2>0 && arg1>0 && -1+arg1 f1_0_main_Load : arg1'=arg1P_3, arg2'=arg2P_3, [], cost: 1 Checking for constant complexity: The following rule is satisfiable with cost >= 1, yielding constant complexity: 2: __init -> f1_0_main_Load : arg1'=arg1P_3, arg2'=arg2P_3, [], cost: 1 Simplified all rules, resulting in: Start location: __init 0: f1_0_main_Load -> f127_0_eq_LE : arg1'=arg1P_1, arg2'=arg2P_1, [ arg1P_1>-1 && arg2>1 && arg2P_1>-1 && arg1>0 ], cost: 1 1: f127_0_eq_LE -> f127_0_eq_LE : arg1'=-1+arg1, arg2'=-1+arg2, [ arg2>0 && arg1>0 ], cost: 1 2: __init -> f1_0_main_Load : arg1'=arg1P_3, arg2'=arg2P_3, [], cost: 1 ### Simplification by acceleration and chaining ### Accelerating simple loops of location 1. Accelerating the following rules: 1: f127_0_eq_LE -> f127_0_eq_LE : arg1'=-1+arg1, arg2'=-1+arg2, [ arg2>0 && arg1>0 ], cost: 1 Accelerated rule 1 with backward acceleration, yielding the new rule 3. Accelerated rule 1 with backward acceleration, yielding the new rule 4. [accelerate] Nesting with 2 inner and 1 outer candidates Removing the simple loops: 1. Accelerated all simple loops using metering functions (where possible): Start location: __init 0: f1_0_main_Load -> f127_0_eq_LE : arg1'=arg1P_1, arg2'=arg2P_1, [ arg1P_1>-1 && arg2>1 && arg2P_1>-1 && arg1>0 ], cost: 1 3: f127_0_eq_LE -> f127_0_eq_LE : arg1'=-arg2+arg1, arg2'=0, [ arg2>=0 && 1-arg2+arg1>0 ], cost: arg2 4: f127_0_eq_LE -> f127_0_eq_LE : arg1'=0, arg2'=arg2-arg1, [ arg1>=0 && 1+arg2-arg1>0 ], cost: arg1 2: __init -> f1_0_main_Load : arg1'=arg1P_3, arg2'=arg2P_3, [], cost: 1 Chained accelerated rules (with incoming rules): Start location: __init 0: f1_0_main_Load -> f127_0_eq_LE : arg1'=arg1P_1, arg2'=arg2P_1, [ arg1P_1>-1 && arg2>1 && arg2P_1>-1 && arg1>0 ], cost: 1 5: f1_0_main_Load -> f127_0_eq_LE : arg1'=arg1P_1-arg2P_1, arg2'=0, [ arg1P_1>-1 && arg2>1 && arg2P_1>-1 && arg1>0 && 1+arg1P_1-arg2P_1>0 ], cost: 1+arg2P_1 6: f1_0_main_Load -> f127_0_eq_LE : arg1'=0, arg2'=-arg1P_1+arg2P_1, [ arg1P_1>-1 && arg2>1 && arg2P_1>-1 && arg1>0 && 1-arg1P_1+arg2P_1>0 ], cost: 1+arg1P_1 2: __init -> f1_0_main_Load : arg1'=arg1P_3, arg2'=arg2P_3, [], cost: 1 Removed unreachable locations (and leaf rules with constant cost): Start location: __init 5: f1_0_main_Load -> f127_0_eq_LE : arg1'=arg1P_1-arg2P_1, arg2'=0, [ arg1P_1>-1 && arg2>1 && arg2P_1>-1 && arg1>0 && 1+arg1P_1-arg2P_1>0 ], cost: 1+arg2P_1 6: f1_0_main_Load -> f127_0_eq_LE : arg1'=0, arg2'=-arg1P_1+arg2P_1, [ arg1P_1>-1 && arg2>1 && arg2P_1>-1 && arg1>0 && 1-arg1P_1+arg2P_1>0 ], cost: 1+arg1P_1 2: __init -> f1_0_main_Load : arg1'=arg1P_3, arg2'=arg2P_3, [], cost: 1 Eliminated locations (on tree-shaped paths): Start location: __init 7: __init -> f127_0_eq_LE : arg1'=arg1P_1-arg2P_1, arg2'=0, [ arg1P_1>-1 && arg2P_3>1 && arg2P_1>-1 && arg1P_3>0 && 1+arg1P_1-arg2P_1>0 ], cost: 2+arg2P_1 8: __init -> f127_0_eq_LE : arg1'=0, arg2'=-arg1P_1+arg2P_1, [ arg1P_1>-1 && arg2P_3>1 && arg2P_1>-1 && arg1P_3>0 && 1-arg1P_1+arg2P_1>0 ], cost: 2+arg1P_1 ### Computing asymptotic complexity ### Fully simplified ITS problem Start location: __init 7: __init -> f127_0_eq_LE : arg1'=arg1P_1-arg2P_1, arg2'=0, [ arg1P_1>-1 && arg2P_3>1 && arg2P_1>-1 && arg1P_3>0 && 1+arg1P_1-arg2P_1>0 ], cost: 2+arg2P_1 8: __init -> f127_0_eq_LE : arg1'=0, arg2'=-arg1P_1+arg2P_1, [ arg1P_1>-1 && arg2P_3>1 && arg2P_1>-1 && arg1P_3>0 && 1-arg1P_1+arg2P_1>0 ], cost: 2+arg1P_1 Computing asymptotic complexity for rule 7 Simplified the guard: 7: __init -> f127_0_eq_LE : arg1'=arg1P_1-arg2P_1, arg2'=0, [ arg2P_3>1 && arg2P_1>-1 && arg1P_3>0 && 1+arg1P_1-arg2P_1>0 ], cost: 2+arg2P_1 Resulting cost 0 has complexity: Unknown Computing asymptotic complexity for rule 8 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),?)