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, arg3'=arg3P_1, [ arg2==arg2P_1 && arg3==arg3P_1 ], cost: 1 1: f2 -> f3 : arg1'=arg1P_2, arg2'=arg2P_2, arg3'=arg3P_2, [ arg1==arg1P_2 && arg3==arg3P_2 ], cost: 1 2: f3 -> f4 : arg1'=arg1P_3, arg2'=arg2P_3, arg3'=arg3P_3, [ arg1==arg1P_3 && arg2==arg2P_3 && 0==arg3P_3 ], cost: 1 16: f4 -> f5 : arg1'=arg1P_17, arg2'=arg2P_17, arg3'=arg3P_17, [ arg1>0 && arg2>0 && arg1==arg1P_17 && arg2==arg2P_17 && arg3==arg3P_17 ], cost: 1 18: f4 -> f17 : arg1'=arg1P_19, arg2'=arg2P_19, arg3'=arg3P_19, [ arg1<=0 && arg1==arg1P_19 && arg2==arg2P_19 && arg3==arg3P_19 ], cost: 1 19: f4 -> f17 : arg1'=arg1P_20, arg2'=arg2P_20, arg3'=arg3P_20, [ arg2<=0 && arg1==arg1P_20 && arg2==arg2P_20 && arg3==arg3P_20 ], cost: 1 3: f6 -> f9 : arg1'=arg1P_4, arg2'=arg2P_4, arg3'=arg3P_4, [ arg1==arg1P_4 && arg2==arg2P_4 && arg1==arg3P_4 ], cost: 1 4: f9 -> f10 : arg1'=arg1P_5, arg2'=arg2P_5, arg3'=arg3P_5, [ arg2==arg1P_5 && arg2==arg2P_5 && arg3==arg3P_5 ], cost: 1 5: f10 -> f11 : arg1'=arg1P_6, arg2'=arg2P_6, arg3'=arg3P_6, [ arg1==arg1P_6 && arg3==arg2P_6 && arg3==arg3P_6 ], cost: 1 14: f11 -> f8 : arg1'=arg1P_15, arg2'=arg2P_15, arg3'=arg3P_15, [ arg1==arg1P_15 && arg2==arg2P_15 && arg3==arg3P_15 ], cost: 1 6: f12 -> f15 : arg1'=arg1P_7, arg2'=arg2P_7, arg3'=arg3P_7, [ arg1==arg1P_7 && arg1==arg2P_7 && arg3==arg3P_7 ], cost: 1 10: f15 -> f14 : arg1'=arg1P_11, arg2'=arg2P_11, arg3'=arg3P_11, [ arg1==arg1P_11 && arg2==arg2P_11 && arg3==arg3P_11 ], cost: 1 7: f13 -> f16 : arg1'=arg1P_8, arg2'=arg2P_8, arg3'=arg3P_8, [ arg1P_8==-1+arg1 && arg2==arg2P_8 && arg3==arg3P_8 ], cost: 1 11: f16 -> f14 : arg1'=arg1P_12, arg2'=arg2P_12, arg3'=arg3P_12, [ arg1==arg1P_12 && arg2==arg2P_12 && arg3==arg3P_12 ], cost: 1 8: f7 -> f12 : arg1'=arg1P_9, arg2'=arg2P_9, arg3'=arg3P_9, [ arg1>arg2 && arg1==arg1P_9 && arg2==arg2P_9 && arg3==arg3P_9 ], cost: 1 9: f7 -> f13 : arg1'=arg1P_10, arg2'=arg2P_10, arg3'=arg3P_10, [ arg1<=arg2 && arg1==arg1P_10 && arg2==arg2P_10 && arg3==arg3P_10 ], cost: 1 15: f14 -> f8 : arg1'=arg1P_16, arg2'=arg2P_16, arg3'=arg3P_16, [ arg1==arg1P_16 && arg2==arg2P_16 && arg3==arg3P_16 ], cost: 1 12: f5 -> f6 : arg1'=arg1P_13, arg2'=arg2P_13, arg3'=arg3P_13, [ arg1 f7 : arg1'=arg1P_14, arg2'=arg2P_14, arg3'=arg3P_14, [ arg1>=arg2 && arg1==arg1P_14 && arg2==arg2P_14 && arg3==arg3P_14 ], cost: 1 17: f8 -> f4 : arg1'=arg1P_18, arg2'=arg2P_18, arg3'=arg3P_18, [ arg1==arg1P_18 && arg2==arg2P_18 && arg3==arg3P_18 ], cost: 1 20: __init -> f1 : arg1'=arg1P_21, arg2'=arg2P_21, arg3'=arg3P_21, [], cost: 1 Checking for constant complexity: The following rule is satisfiable with cost >= 1, yielding constant complexity: 20: __init -> f1 : arg1'=arg1P_21, arg2'=arg2P_21, arg3'=arg3P_21, [], cost: 1 Removed unreachable and leaf rules: Start location: __init 0: f1 -> f2 : arg1'=arg1P_1, arg2'=arg2P_1, arg3'=arg3P_1, [ arg2==arg2P_1 && arg3==arg3P_1 ], cost: 1 1: f2 -> f3 : arg1'=arg1P_2, arg2'=arg2P_2, arg3'=arg3P_2, [ arg1==arg1P_2 && arg3==arg3P_2 ], cost: 1 2: f3 -> f4 : arg1'=arg1P_3, arg2'=arg2P_3, arg3'=arg3P_3, [ arg1==arg1P_3 && arg2==arg2P_3 && 0==arg3P_3 ], cost: 1 16: f4 -> f5 : arg1'=arg1P_17, arg2'=arg2P_17, arg3'=arg3P_17, [ arg1>0 && arg2>0 && arg1==arg1P_17 && arg2==arg2P_17 && arg3==arg3P_17 ], cost: 1 3: f6 -> f9 : arg1'=arg1P_4, arg2'=arg2P_4, arg3'=arg3P_4, [ arg1==arg1P_4 && arg2==arg2P_4 && arg1==arg3P_4 ], cost: 1 4: f9 -> f10 : arg1'=arg1P_5, arg2'=arg2P_5, arg3'=arg3P_5, [ arg2==arg1P_5 && arg2==arg2P_5 && arg3==arg3P_5 ], cost: 1 5: f10 -> f11 : arg1'=arg1P_6, arg2'=arg2P_6, arg3'=arg3P_6, [ arg1==arg1P_6 && arg3==arg2P_6 && arg3==arg3P_6 ], cost: 1 14: f11 -> f8 : arg1'=arg1P_15, arg2'=arg2P_15, arg3'=arg3P_15, [ arg1==arg1P_15 && arg2==arg2P_15 && arg3==arg3P_15 ], cost: 1 6: f12 -> f15 : arg1'=arg1P_7, arg2'=arg2P_7, arg3'=arg3P_7, [ arg1==arg1P_7 && arg1==arg2P_7 && arg3==arg3P_7 ], cost: 1 10: f15 -> f14 : arg1'=arg1P_11, arg2'=arg2P_11, arg3'=arg3P_11, [ arg1==arg1P_11 && arg2==arg2P_11 && arg3==arg3P_11 ], cost: 1 7: f13 -> f16 : arg1'=arg1P_8, arg2'=arg2P_8, arg3'=arg3P_8, [ arg1P_8==-1+arg1 && arg2==arg2P_8 && arg3==arg3P_8 ], cost: 1 11: f16 -> f14 : arg1'=arg1P_12, arg2'=arg2P_12, arg3'=arg3P_12, [ arg1==arg1P_12 && arg2==arg2P_12 && arg3==arg3P_12 ], cost: 1 8: f7 -> f12 : arg1'=arg1P_9, arg2'=arg2P_9, arg3'=arg3P_9, [ arg1>arg2 && arg1==arg1P_9 && arg2==arg2P_9 && arg3==arg3P_9 ], cost: 1 9: f7 -> f13 : arg1'=arg1P_10, arg2'=arg2P_10, arg3'=arg3P_10, [ arg1<=arg2 && arg1==arg1P_10 && arg2==arg2P_10 && arg3==arg3P_10 ], cost: 1 15: f14 -> f8 : arg1'=arg1P_16, arg2'=arg2P_16, arg3'=arg3P_16, [ arg1==arg1P_16 && arg2==arg2P_16 && arg3==arg3P_16 ], cost: 1 12: f5 -> f6 : arg1'=arg1P_13, arg2'=arg2P_13, arg3'=arg3P_13, [ arg1 f7 : arg1'=arg1P_14, arg2'=arg2P_14, arg3'=arg3P_14, [ arg1>=arg2 && arg1==arg1P_14 && arg2==arg2P_14 && arg3==arg3P_14 ], cost: 1 17: f8 -> f4 : arg1'=arg1P_18, arg2'=arg2P_18, arg3'=arg3P_18, [ arg1==arg1P_18 && arg2==arg2P_18 && arg3==arg3P_18 ], cost: 1 20: __init -> f1 : arg1'=arg1P_21, arg2'=arg2P_21, arg3'=arg3P_21, [], 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 2: f3 -> f4 : arg3'=0, [], cost: 1 16: f4 -> f5 : [ arg1>0 && arg2>0 ], cost: 1 3: f6 -> f9 : arg3'=arg1, [], cost: 1 4: f9 -> f10 : arg1'=arg2, [], cost: 1 5: f10 -> f11 : arg2'=arg3, [], cost: 1 14: f11 -> f8 : [], cost: 1 6: f12 -> f15 : arg2'=arg1, [], cost: 1 10: f15 -> f14 : [], cost: 1 7: f13 -> f16 : arg1'=-1+arg1, [], cost: 1 11: f16 -> f14 : [], cost: 1 8: f7 -> f12 : [ arg1>arg2 ], cost: 1 9: f7 -> f13 : [ arg1<=arg2 ], cost: 1 15: f14 -> f8 : [], cost: 1 12: f5 -> f6 : [ arg1 f7 : [ arg1>=arg2 ], cost: 1 17: f8 -> f4 : [], cost: 1 20: __init -> f1 : arg1'=arg1P_21, arg2'=arg2P_21, arg3'=arg3P_21, [], cost: 1 ### Simplification by acceleration and chaining ### Eliminated locations (on linear paths): Start location: __init 16: f4 -> f5 : [ arg1>0 && arg2>0 ], cost: 1 30: f7 -> f14 : arg2'=arg1, [ arg1>arg2 ], cost: 3 31: f7 -> f14 : arg1'=-1+arg1, [ arg1<=arg2 ], cost: 3 15: f14 -> f8 : [], cost: 1 13: f5 -> f7 : [ arg1>=arg2 ], cost: 1 27: f5 -> f8 : arg1'=arg2, arg2'=arg1, arg3'=arg1, [ arg1 f4 : [], cost: 1 23: __init -> f4 : arg1'=arg1P_1, arg2'=arg2P_2, arg3'=0, [], cost: 4 Eliminated locations (on tree-shaped paths): Start location: __init 32: f4 -> f7 : [ arg1>0 && arg2>0 && arg1>=arg2 ], cost: 2 33: f4 -> f8 : arg1'=arg2, arg2'=arg1, arg3'=arg1, [ arg1>0 && arg2>0 && arg1 f8 : arg2'=arg1, [ arg1>arg2 ], cost: 4 35: f7 -> f8 : arg1'=-1+arg1, [ arg1<=arg2 ], cost: 4 17: f8 -> f4 : [], cost: 1 23: __init -> f4 : arg1'=arg1P_1, arg2'=arg2P_2, arg3'=0, [], cost: 4 Eliminated locations (on tree-shaped paths): Start location: __init 38: f4 -> f4 : arg1'=arg2, arg2'=arg1, arg3'=arg1, [ arg1>0 && arg2>0 && arg1 f4 : arg2'=arg1, [ arg1>0 && arg2>0 && arg1>arg2 ], cost: 7 40: f4 -> f4 : arg1'=-1+arg1, [ arg1>0 && arg2>0 && arg1>=arg2 && arg1<=arg2 ], cost: 7 23: __init -> f4 : arg1'=arg1P_1, arg2'=arg2P_2, arg3'=0, [], cost: 4 Accelerating simple loops of location 3. Simplified some of the simple loops (and removed duplicate rules). Accelerating the following rules: 38: f4 -> f4 : arg1'=arg2, arg2'=arg1, arg3'=arg1, [ arg1>0 && arg2>0 && arg1 f4 : arg2'=arg1, [ arg1>0 && arg2>0 && arg1>arg2 ], cost: 7 40: f4 -> f4 : arg1'=-1+arg1, [ arg1>0 && arg2>0 && arg2-arg1==0 ], cost: 7 Failed to prove monotonicity of the guard of rule 38. Failed to prove monotonicity of the guard of rule 39. Failed to prove monotonicity of the guard of rule 40. [accelerate] Nesting with 3 inner and 3 outer candidates Accelerated all simple loops using metering functions (where possible): Start location: __init 38: f4 -> f4 : arg1'=arg2, arg2'=arg1, arg3'=arg1, [ arg1>0 && arg2>0 && arg1 f4 : arg2'=arg1, [ arg1>0 && arg2>0 && arg1>arg2 ], cost: 7 40: f4 -> f4 : arg1'=-1+arg1, [ arg1>0 && arg2>0 && arg2-arg1==0 ], cost: 7 23: __init -> f4 : arg1'=arg1P_1, arg2'=arg2P_2, arg3'=0, [], cost: 4 Chained accelerated rules (with incoming rules): Start location: __init 23: __init -> f4 : arg1'=arg1P_1, arg2'=arg2P_2, arg3'=0, [], cost: 4 41: __init -> f4 : arg1'=arg2P_2, arg2'=arg1P_1, arg3'=arg1P_1, [ arg1P_1>0 && arg2P_2>0 && arg1P_1 f4 : arg1'=arg1P_1, arg2'=arg1P_1, arg3'=0, [ 1<=-1+arg1P_1 ], cost: 11 43: __init -> f4 : arg1'=-1+arg2P_2, arg2'=arg2P_2, arg3'=0, [ arg2P_2>0 ], cost: 11 Removed unreachable locations (and leaf rules with constant cost): Start location: __init ### Computing asymptotic complexity ### Fully simplified ITS problem Start location: __init 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),?)