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, [ arg1==arg1P_1 && 0==arg2P_1 && arg3==arg3P_1 ], cost: 1 1: f2 -> f3 : arg1'=arg1P_2, arg2'=arg2P_2, arg3'=arg3P_2, [ arg1==arg1P_2 && arg2==arg2P_2 ], cost: 1 2: f3 -> f4 : arg1'=arg1P_3, arg2'=arg2P_3, arg3'=arg3P_3, [ arg3==arg1P_3 && arg2==arg2P_3 && arg3==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 -> f14 : arg1'=arg1P_19, arg2'=arg2P_19, arg3'=arg3P_19, [ arg1<0 && arg1==arg1P_19 && arg2==arg2P_19 && arg3==arg3P_19 ], cost: 1 19: f4 -> f14 : arg1'=arg1P_20, arg2'=arg2P_20, arg3'=arg3P_20, [ arg2<0 && arg1==arg1P_20 && arg2==arg2P_20 && arg3==arg3P_20 ], cost: 1 3: f9 -> f10 : arg1'=arg1P_4, arg2'=arg2P_4, arg3'=arg3P_4, [ arg2P_4==1+arg2 && arg1==arg1P_4 && arg3==arg3P_4 ], cost: 1 6: f10 -> f6 : arg1'=arg1P_7, arg2'=arg2P_7, arg3'=arg3P_7, [ arg1==arg1P_7 && arg2==arg2P_7 && arg3==arg3P_7 ], cost: 1 4: f6 -> f9 : arg1'=arg1P_5, arg2'=arg2P_5, arg3'=arg3P_5, [ arg2<=arg3 && x14_1<0 && arg1==arg1P_5 && arg2==arg2P_5 && arg3==arg3P_5 ], cost: 1 5: f6 -> f9 : arg1'=arg1P_6, arg2'=arg2P_6, arg3'=arg3P_6, [ arg2<=arg3 && x54_1>0 && arg1==arg1P_6 && arg2==arg2P_6 && arg3==arg3P_6 ], cost: 1 7: f6 -> f11 : arg1'=arg1P_8, arg2'=arg2P_8, arg3'=arg3P_8, [ arg2>arg3 && arg1==arg1P_8 && arg2==arg2P_8 && arg3==arg3P_8 ], cost: 1 8: f6 -> f11 : arg1'=arg1P_9, arg2'=arg2P_9, arg3'=arg3P_9, [ x58_1==0 && arg1==arg1P_9 && arg2==arg2P_9 && arg3==arg3P_9 ], cost: 1 9: f11 -> f12 : arg1'=arg1P_10, arg2'=arg2P_10, arg3'=arg3P_10, [ arg1P_10==-1+arg1 && arg2==arg2P_10 && arg3==arg3P_10 ], cost: 1 13: f12 -> f8 : arg1'=arg1P_14, arg2'=arg2P_14, arg3'=arg3P_14, [ arg1==arg1P_14 && arg2==arg2P_14 && arg3==arg3P_14 ], cost: 1 10: f5 -> f6 : arg1'=arg1P_11, arg2'=arg2P_11, arg3'=arg3P_11, [ x28_1<0 && arg1==arg1P_11 && arg2==arg2P_11 && arg3==arg3P_11 ], cost: 1 11: f5 -> f6 : arg1'=arg1P_12, arg2'=arg2P_12, arg3'=arg3P_12, [ x66_1>0 && arg1==arg1P_12 && arg2==arg2P_12 && arg3==arg3P_12 ], cost: 1 12: f5 -> f7 : arg1'=arg1P_13, arg2'=arg2P_13, arg3'=arg3P_13, [ x32_1==0 && arg1==arg1P_13 && arg2==arg2P_13 && arg3==arg3P_13 ], cost: 1 14: f7 -> f8 : arg1'=arg1P_15, arg2'=arg2P_15, arg3'=arg3P_15, [ arg1==arg1P_15 && arg2==arg2P_15 && arg3==arg3P_15 ], cost: 1 15: f8 -> f13 : arg1'=arg1P_16, arg2'=arg2P_16, arg3'=arg3P_16, [ arg2P_16==-1+arg2 && arg1==arg1P_16 && arg3==arg3P_16 ], cost: 1 17: f13 -> 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, [ arg1==arg1P_1 && 0==arg2P_1 && arg3==arg3P_1 ], cost: 1 1: f2 -> f3 : arg1'=arg1P_2, arg2'=arg2P_2, arg3'=arg3P_2, [ arg1==arg1P_2 && arg2==arg2P_2 ], cost: 1 2: f3 -> f4 : arg1'=arg1P_3, arg2'=arg2P_3, arg3'=arg3P_3, [ arg3==arg1P_3 && arg2==arg2P_3 && arg3==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: f9 -> f10 : arg1'=arg1P_4, arg2'=arg2P_4, arg3'=arg3P_4, [ arg2P_4==1+arg2 && arg1==arg1P_4 && arg3==arg3P_4 ], cost: 1 6: f10 -> f6 : arg1'=arg1P_7, arg2'=arg2P_7, arg3'=arg3P_7, [ arg1==arg1P_7 && arg2==arg2P_7 && arg3==arg3P_7 ], cost: 1 4: f6 -> f9 : arg1'=arg1P_5, arg2'=arg2P_5, arg3'=arg3P_5, [ arg2<=arg3 && x14_1<0 && arg1==arg1P_5 && arg2==arg2P_5 && arg3==arg3P_5 ], cost: 1 5: f6 -> f9 : arg1'=arg1P_6, arg2'=arg2P_6, arg3'=arg3P_6, [ arg2<=arg3 && x54_1>0 && arg1==arg1P_6 && arg2==arg2P_6 && arg3==arg3P_6 ], cost: 1 7: f6 -> f11 : arg1'=arg1P_8, arg2'=arg2P_8, arg3'=arg3P_8, [ arg2>arg3 && arg1==arg1P_8 && arg2==arg2P_8 && arg3==arg3P_8 ], cost: 1 8: f6 -> f11 : arg1'=arg1P_9, arg2'=arg2P_9, arg3'=arg3P_9, [ x58_1==0 && arg1==arg1P_9 && arg2==arg2P_9 && arg3==arg3P_9 ], cost: 1 9: f11 -> f12 : arg1'=arg1P_10, arg2'=arg2P_10, arg3'=arg3P_10, [ arg1P_10==-1+arg1 && arg2==arg2P_10 && arg3==arg3P_10 ], cost: 1 13: f12 -> f8 : arg1'=arg1P_14, arg2'=arg2P_14, arg3'=arg3P_14, [ arg1==arg1P_14 && arg2==arg2P_14 && arg3==arg3P_14 ], cost: 1 10: f5 -> f6 : arg1'=arg1P_11, arg2'=arg2P_11, arg3'=arg3P_11, [ x28_1<0 && arg1==arg1P_11 && arg2==arg2P_11 && arg3==arg3P_11 ], cost: 1 11: f5 -> f6 : arg1'=arg1P_12, arg2'=arg2P_12, arg3'=arg3P_12, [ x66_1>0 && arg1==arg1P_12 && arg2==arg2P_12 && arg3==arg3P_12 ], cost: 1 12: f5 -> f7 : arg1'=arg1P_13, arg2'=arg2P_13, arg3'=arg3P_13, [ x32_1==0 && arg1==arg1P_13 && arg2==arg2P_13 && arg3==arg3P_13 ], cost: 1 14: f7 -> f8 : arg1'=arg1P_15, arg2'=arg2P_15, arg3'=arg3P_15, [ arg1==arg1P_15 && arg2==arg2P_15 && arg3==arg3P_15 ], cost: 1 15: f8 -> f13 : arg1'=arg1P_16, arg2'=arg2P_16, arg3'=arg3P_16, [ arg2P_16==-1+arg2 && arg1==arg1P_16 && arg3==arg3P_16 ], cost: 1 17: f13 -> 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 : arg2'=0, [], cost: 1 1: f2 -> f3 : arg3'=arg3P_2, [], cost: 1 2: f3 -> f4 : arg1'=arg3, [], cost: 1 16: f4 -> f5 : [ arg1>=0 && arg2>=0 ], cost: 1 3: f9 -> f10 : arg2'=1+arg2, [], cost: 1 6: f10 -> f6 : [], cost: 1 5: f6 -> f9 : [ arg2<=arg3 ], cost: 1 7: f6 -> f11 : [ arg2>arg3 ], cost: 1 8: f6 -> f11 : [], cost: 1 9: f11 -> f12 : arg1'=-1+arg1, [], cost: 1 13: f12 -> f8 : [], cost: 1 11: f5 -> f6 : [], cost: 1 12: f5 -> f7 : [], cost: 1 14: f7 -> f8 : [], cost: 1 15: f8 -> f13 : arg2'=-1+arg2, [], cost: 1 17: f13 -> 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 7: f6 -> f11 : [ arg2>arg3 ], cost: 1 8: f6 -> f11 : [], cost: 1 26: f6 -> f6 : arg2'=1+arg2, [ arg2<=arg3 ], cost: 3 27: f11 -> f8 : arg1'=-1+arg1, [], cost: 2 11: f5 -> f6 : [], cost: 1 24: f5 -> f8 : [], cost: 2 28: f8 -> f4 : arg2'=-1+arg2, [], cost: 2 23: __init -> f4 : arg1'=arg3P_2, arg2'=0, arg3'=arg3P_2, [], cost: 4 Accelerating simple loops of location 6. Accelerating the following rules: 26: f6 -> f6 : arg2'=1+arg2, [ arg2<=arg3 ], cost: 3 Accelerated rule 26 with backward acceleration, yielding the new rule 29. [accelerate] Nesting with 1 inner and 1 outer candidates Removing the simple loops: 26. Accelerated all simple loops using metering functions (where possible): Start location: __init 16: f4 -> f5 : [ arg1>=0 && arg2>=0 ], cost: 1 7: f6 -> f11 : [ arg2>arg3 ], cost: 1 8: f6 -> f11 : [], cost: 1 29: f6 -> f6 : arg2'=1+arg3, [ 1-arg2+arg3>=0 ], cost: 3-3*arg2+3*arg3 27: f11 -> f8 : arg1'=-1+arg1, [], cost: 2 11: f5 -> f6 : [], cost: 1 24: f5 -> f8 : [], cost: 2 28: f8 -> f4 : arg2'=-1+arg2, [], cost: 2 23: __init -> f4 : arg1'=arg3P_2, arg2'=0, arg3'=arg3P_2, [], cost: 4 Chained accelerated rules (with incoming rules): Start location: __init 16: f4 -> f5 : [ arg1>=0 && arg2>=0 ], cost: 1 7: f6 -> f11 : [ arg2>arg3 ], cost: 1 8: f6 -> f11 : [], cost: 1 27: f11 -> f8 : arg1'=-1+arg1, [], cost: 2 11: f5 -> f6 : [], cost: 1 24: f5 -> f8 : [], cost: 2 30: f5 -> f6 : arg2'=1+arg3, [ 1-arg2+arg3>=0 ], cost: 4-3*arg2+3*arg3 28: f8 -> f4 : arg2'=-1+arg2, [], cost: 2 23: __init -> f4 : arg1'=arg3P_2, arg2'=0, arg3'=arg3P_2, [], cost: 4 Eliminated locations (on tree-shaped paths): Start location: __init 31: f4 -> f6 : [ arg1>=0 && arg2>=0 ], cost: 2 32: f4 -> f8 : [ arg1>=0 && arg2>=0 ], cost: 3 33: f4 -> f6 : arg2'=1+arg3, [ arg1>=0 && arg2>=0 && 1-arg2+arg3>=0 ], cost: 5-3*arg2+3*arg3 34: f6 -> f8 : arg1'=-1+arg1, [ arg2>arg3 ], cost: 3 35: f6 -> f8 : arg1'=-1+arg1, [], cost: 3 28: f8 -> f4 : arg2'=-1+arg2, [], cost: 2 23: __init -> f4 : arg1'=arg3P_2, arg2'=0, arg3'=arg3P_2, [], cost: 4 Merged rules: Start location: __init 31: f4 -> f6 : [ arg1>=0 && arg2>=0 ], cost: 2 32: f4 -> f8 : [ arg1>=0 && arg2>=0 ], cost: 3 33: f4 -> f6 : arg2'=1+arg3, [ arg1>=0 && arg2>=0 && 1-arg2+arg3>=0 ], cost: 5-3*arg2+3*arg3 36: f6 -> f8 : arg1'=-1+arg1, [], cost: 3 28: f8 -> f4 : arg2'=-1+arg2, [], cost: 2 23: __init -> f4 : arg1'=arg3P_2, arg2'=0, arg3'=arg3P_2, [], cost: 4 Eliminated locations (on tree-shaped paths): Start location: __init 39: f4 -> f4 : arg2'=-1+arg2, [ arg1>=0 && arg2>=0 ], cost: 5 40: f4 -> f4 : arg1'=-1+arg1, arg2'=-1+arg2, [ arg1>=0 && arg2>=0 ], cost: 7 41: f4 -> f4 : arg1'=-1+arg1, arg2'=arg3, [ arg1>=0 && arg2>=0 && 1-arg2+arg3>=0 ], cost: 10-3*arg2+3*arg3 23: __init -> f4 : arg1'=arg3P_2, arg2'=0, arg3'=arg3P_2, [], cost: 4 Accelerating simple loops of location 3. Accelerating the following rules: 39: f4 -> f4 : arg2'=-1+arg2, [ arg1>=0 && arg2>=0 ], cost: 5 40: f4 -> f4 : arg1'=-1+arg1, arg2'=-1+arg2, [ arg1>=0 && arg2>=0 ], cost: 7 41: f4 -> f4 : arg1'=-1+arg1, arg2'=arg3, [ arg1>=0 && arg2>=0 && 1-arg2+arg3>=0 ], cost: 10-3*arg2+3*arg3 Accelerated rule 39 with backward acceleration, yielding the new rule 42. Accelerated rule 40 with backward acceleration, yielding the new rule 43. Accelerated rule 40 with backward acceleration, yielding the new rule 44. [test] deduced pseudo-invariant -arg2+arg3<=0, also trying arg2-arg3<=-1 Accelerated rule 41 with backward acceleration, yielding the new rule 45. [accelerate] Nesting with 4 inner and 3 outer candidates Removing the simple loops: 39 40. Accelerated all simple loops using metering functions (where possible): Start location: __init 41: f4 -> f4 : arg1'=-1+arg1, arg2'=arg3, [ arg1>=0 && arg2>=0 && 1-arg2+arg3>=0 ], cost: 10-3*arg2+3*arg3 42: f4 -> f4 : arg2'=-1, [ arg1>=0 && 1+arg2>=0 ], cost: 5+5*arg2 43: f4 -> f4 : arg1'=-1, arg2'=-1+arg2-arg1, [ 1+arg1>=0 && arg2-arg1>=0 ], cost: 7+7*arg1 44: f4 -> f4 : arg1'=-1-arg2+arg1, arg2'=-1, [ 1+arg2>=0 && -arg2+arg1>=0 ], cost: 7+7*arg2 45: f4 -> f4 : arg1'=-1, arg2'=arg3, [ 1-arg2+arg3>=0 && -arg2+arg3<=0 && 1+arg1>=1 && arg3>=0 ], cost: 10+10*arg1 23: __init -> f4 : arg1'=arg3P_2, arg2'=0, arg3'=arg3P_2, [], cost: 4 Chained accelerated rules (with incoming rules): Start location: __init 23: __init -> f4 : arg1'=arg3P_2, arg2'=0, arg3'=arg3P_2, [], cost: 4 46: __init -> f4 : arg1'=-1+arg3P_2, arg2'=arg3P_2, arg3'=arg3P_2, [ arg3P_2>=0 ], cost: 14+3*arg3P_2 47: __init -> f4 : arg1'=arg3P_2, arg2'=-1, arg3'=arg3P_2, [ arg3P_2>=0 ], cost: 9 48: __init -> f4 : arg1'=-1, arg2'=-1-arg3P_2, arg3'=arg3P_2, [ 1+arg3P_2>=0 && -arg3P_2>=0 ], cost: 11+7*arg3P_2 49: __init -> f4 : arg1'=-1+arg3P_2, arg2'=-1, arg3'=arg3P_2, [ arg3P_2>=0 ], cost: 11 50: __init -> f4 : arg1'=-1, arg2'=0, arg3'=0, [], cost: 14 Removed unreachable locations (and leaf rules with constant cost): Start location: __init 46: __init -> f4 : arg1'=-1+arg3P_2, arg2'=arg3P_2, arg3'=arg3P_2, [ arg3P_2>=0 ], cost: 14+3*arg3P_2 48: __init -> f4 : arg1'=-1, arg2'=-1-arg3P_2, arg3'=arg3P_2, [ 1+arg3P_2>=0 && -arg3P_2>=0 ], cost: 11+7*arg3P_2 ### Computing asymptotic complexity ### Fully simplified ITS problem Start location: __init 46: __init -> f4 : arg1'=-1+arg3P_2, arg2'=arg3P_2, arg3'=arg3P_2, [ arg3P_2>=0 ], cost: 14+3*arg3P_2 48: __init -> f4 : arg1'=-1, arg2'=-1-arg3P_2, arg3'=arg3P_2, [ 1+arg3P_2>=0 && -arg3P_2>=0 ], cost: 11+7*arg3P_2 Computing asymptotic complexity for rule 46 Resulting cost 0 has complexity: Unknown Computing asymptotic complexity for rule 48 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),?)