NO ### Pre-processing the ITS problem ### Initial linear ITS problem Start location: __init 0: f1 -> f2 : arg1'=arg1P_1, [], cost: 1 17: f2 -> f3 : arg1'=arg1P_18, [ arg1<0 && arg1==arg1P_18 ], cost: 1 18: f2 -> f3 : arg1'=arg1P_19, [ arg1>0 && arg1==arg1P_19 ], cost: 1 20: f2 -> f17 : arg1'=arg1P_21, [ arg1==0 && arg1==arg1P_21 ], cost: 1 1: f4 -> f7 : arg1'=arg1P_2, [ arg1P_2==2+arg1 ], cost: 1 3: f7 -> f8 : arg1'=arg1P_4, [ arg1<0 && arg1==arg1P_4 ], cost: 1 4: f7 -> f9 : arg1'=arg1P_5, [ arg1>=0 && arg1==arg1P_5 ], cost: 1 2: f8 -> f11 : arg1'=arg1P_3, [ arg1P_3==-arg1 ], cost: 1 5: f11 -> f10 : arg1'=arg1P_6, [ arg1==arg1P_6 ], cost: 1 6: f9 -> f10 : arg1'=arg1P_7, [ arg1==arg1P_7 ], cost: 1 15: f10 -> f6 : arg1'=arg1P_16, [ arg1==arg1P_16 ], cost: 1 7: f5 -> f12 : arg1'=arg1P_8, [ arg1P_8==-2+arg1 ], cost: 1 9: f12 -> f13 : arg1'=arg1P_10, [ arg1>0 && arg1==arg1P_10 ], cost: 1 10: f12 -> f14 : arg1'=arg1P_11, [ arg1<=0 && arg1==arg1P_11 ], cost: 1 8: f13 -> f16 : arg1'=arg1P_9, [ arg1P_9==-arg1 ], cost: 1 11: f16 -> f15 : arg1'=arg1P_12, [ arg1==arg1P_12 ], cost: 1 12: f14 -> f15 : arg1'=arg1P_13, [ arg1==arg1P_13 ], cost: 1 16: f15 -> f6 : arg1'=arg1P_17, [ arg1==arg1P_17 ], cost: 1 13: f3 -> f4 : arg1'=arg1P_14, [ arg1<0 && arg1==arg1P_14 ], cost: 1 14: f3 -> f5 : arg1'=arg1P_15, [ arg1>=0 && arg1==arg1P_15 ], cost: 1 19: f6 -> f2 : arg1'=arg1P_20, [ arg1==arg1P_20 ], cost: 1 21: __init -> f1 : arg1'=arg1P_22, [], cost: 1 Checking for constant complexity: The following rule is satisfiable with cost >= 1, yielding constant complexity: 21: __init -> f1 : arg1'=arg1P_22, [], cost: 1 Removed unreachable and leaf rules: Start location: __init 0: f1 -> f2 : arg1'=arg1P_1, [], cost: 1 17: f2 -> f3 : arg1'=arg1P_18, [ arg1<0 && arg1==arg1P_18 ], cost: 1 18: f2 -> f3 : arg1'=arg1P_19, [ arg1>0 && arg1==arg1P_19 ], cost: 1 1: f4 -> f7 : arg1'=arg1P_2, [ arg1P_2==2+arg1 ], cost: 1 3: f7 -> f8 : arg1'=arg1P_4, [ arg1<0 && arg1==arg1P_4 ], cost: 1 4: f7 -> f9 : arg1'=arg1P_5, [ arg1>=0 && arg1==arg1P_5 ], cost: 1 2: f8 -> f11 : arg1'=arg1P_3, [ arg1P_3==-arg1 ], cost: 1 5: f11 -> f10 : arg1'=arg1P_6, [ arg1==arg1P_6 ], cost: 1 6: f9 -> f10 : arg1'=arg1P_7, [ arg1==arg1P_7 ], cost: 1 15: f10 -> f6 : arg1'=arg1P_16, [ arg1==arg1P_16 ], cost: 1 7: f5 -> f12 : arg1'=arg1P_8, [ arg1P_8==-2+arg1 ], cost: 1 9: f12 -> f13 : arg1'=arg1P_10, [ arg1>0 && arg1==arg1P_10 ], cost: 1 10: f12 -> f14 : arg1'=arg1P_11, [ arg1<=0 && arg1==arg1P_11 ], cost: 1 8: f13 -> f16 : arg1'=arg1P_9, [ arg1P_9==-arg1 ], cost: 1 11: f16 -> f15 : arg1'=arg1P_12, [ arg1==arg1P_12 ], cost: 1 12: f14 -> f15 : arg1'=arg1P_13, [ arg1==arg1P_13 ], cost: 1 16: f15 -> f6 : arg1'=arg1P_17, [ arg1==arg1P_17 ], cost: 1 13: f3 -> f4 : arg1'=arg1P_14, [ arg1<0 && arg1==arg1P_14 ], cost: 1 14: f3 -> f5 : arg1'=arg1P_15, [ arg1>=0 && arg1==arg1P_15 ], cost: 1 19: f6 -> f2 : arg1'=arg1P_20, [ arg1==arg1P_20 ], cost: 1 21: __init -> f1 : arg1'=arg1P_22, [], cost: 1 Simplified all rules, resulting in: Start location: __init 0: f1 -> f2 : arg1'=arg1P_1, [], cost: 1 17: f2 -> f3 : [ arg1<0 ], cost: 1 18: f2 -> f3 : [ arg1>0 ], cost: 1 1: f4 -> f7 : arg1'=2+arg1, [], cost: 1 3: f7 -> f8 : [ arg1<0 ], cost: 1 4: f7 -> f9 : [ arg1>=0 ], cost: 1 2: f8 -> f11 : arg1'=-arg1, [], cost: 1 5: f11 -> f10 : [], cost: 1 6: f9 -> f10 : [], cost: 1 15: f10 -> f6 : [], cost: 1 7: f5 -> f12 : arg1'=-2+arg1, [], cost: 1 9: f12 -> f13 : [ arg1>0 ], cost: 1 10: f12 -> f14 : [ arg1<=0 ], cost: 1 8: f13 -> f16 : arg1'=-arg1, [], cost: 1 11: f16 -> f15 : [], cost: 1 12: f14 -> f15 : [], cost: 1 16: f15 -> f6 : [], cost: 1 13: f3 -> f4 : [ arg1<0 ], cost: 1 14: f3 -> f5 : [ arg1>=0 ], cost: 1 19: f6 -> f2 : [], cost: 1 21: __init -> f1 : arg1'=arg1P_22, [], cost: 1 ### Simplification by acceleration and chaining ### Eliminated locations (on linear paths): Start location: __init 17: f2 -> f3 : [ arg1<0 ], cost: 1 18: f2 -> f3 : [ arg1>0 ], cost: 1 26: f7 -> f10 : [ arg1>=0 ], cost: 2 27: f7 -> f10 : arg1'=-arg1, [ arg1<0 ], cost: 3 15: f10 -> f6 : [], cost: 1 29: f12 -> f15 : [ arg1<=0 ], cost: 2 30: f12 -> f15 : arg1'=-arg1, [ arg1>0 ], cost: 3 16: f15 -> f6 : [], cost: 1 23: f3 -> f7 : arg1'=2+arg1, [ arg1<0 ], cost: 2 24: f3 -> f12 : arg1'=-2+arg1, [ arg1>=0 ], cost: 2 19: f6 -> f2 : [], cost: 1 22: __init -> f2 : arg1'=arg1P_1, [], cost: 2 Eliminated locations (on tree-shaped paths): Start location: __init 31: f2 -> f7 : arg1'=2+arg1, [ arg1<0 ], cost: 3 32: f2 -> f12 : arg1'=-2+arg1, [ arg1>0 ], cost: 3 33: f7 -> f6 : [ arg1>=0 ], cost: 3 34: f7 -> f6 : arg1'=-arg1, [ arg1<0 ], cost: 4 35: f12 -> f6 : [ arg1<=0 ], cost: 3 36: f12 -> f6 : arg1'=-arg1, [ arg1>0 ], cost: 4 19: f6 -> f2 : [], cost: 1 22: __init -> f2 : arg1'=arg1P_1, [], cost: 2 Eliminated locations (on tree-shaped paths): Start location: __init 37: f2 -> f6 : arg1'=2+arg1, [ arg1<0 && 2+arg1>=0 ], cost: 6 38: f2 -> f6 : arg1'=-2-arg1, [ 2+arg1<0 ], cost: 7 39: f2 -> f6 : arg1'=-2+arg1, [ arg1>0 && -2+arg1<=0 ], cost: 6 40: f2 -> f6 : arg1'=2-arg1, [ -2+arg1>0 ], cost: 7 19: f6 -> f2 : [], cost: 1 22: __init -> f2 : arg1'=arg1P_1, [], cost: 2 Eliminated locations (on tree-shaped paths): Start location: __init 41: f2 -> f2 : arg1'=2+arg1, [ arg1<0 && 2+arg1>=0 ], cost: 7 42: f2 -> f2 : arg1'=-2-arg1, [ 2+arg1<0 ], cost: 8 43: f2 -> f2 : arg1'=-2+arg1, [ arg1>0 && -2+arg1<=0 ], cost: 7 44: f2 -> f2 : arg1'=2-arg1, [ -2+arg1>0 ], cost: 8 22: __init -> f2 : arg1'=arg1P_1, [], cost: 2 Accelerating simple loops of location 1. Accelerating the following rules: 41: f2 -> f2 : arg1'=2+arg1, [ arg1<0 && 2+arg1>=0 ], cost: 7 42: f2 -> f2 : arg1'=-2-arg1, [ 2+arg1<0 ], cost: 8 43: f2 -> f2 : arg1'=-2+arg1, [ arg1>0 && -2+arg1<=0 ], cost: 7 44: f2 -> f2 : arg1'=2-arg1, [ -2+arg1>0 ], cost: 8 Failed to prove monotonicity of the guard of rule 41. Failed to prove monotonicity of the guard of rule 42. Failed to prove monotonicity of the guard of rule 43. Failed to prove monotonicity of the guard of rule 44. [accelerate] Nesting with 4 inner and 4 outer candidates Nested simple loops 43 (outer loop) and 41 (inner loop) with Rule(1 | 1+arg1==0, | NONTERM || 18 | ), resulting in the new rules: 45, 46. Nested simple loops 44 (outer loop) and 42 (inner loop) with Rule(1 | k>=0, -4*k-arg1>0, | 16*k || 1 | 0=4*k+arg1, ), resulting in the new rules: 47, 48. Nested simple loops 41 (outer loop) and 43 (inner loop) with Rule(1 | 1-arg1==0, | NONTERM || 18 | ), resulting in the new rules: 49, 50. Nested simple loops 42 (outer loop) and 44 (inner loop) with Rule(1 | k_1>=0, 4*k_1-arg1<0, | 16*k_1 || 1 | 0=-4*k_1+arg1, ), resulting in the new rules: 51, 52. Removing the simple loops: 41 42 43 44. Accelerated all simple loops using metering functions (where possible): Start location: __init 45: f2 -> [18] : [ 1+arg1==0 ], cost: NONTERM 46: f2 -> [18] : [ -1+arg1==0 ], cost: NONTERM 47: f2 -> f2 : arg1'=4*k+arg1, [ k>=0 && -4*k-arg1>0 ], cost: 16*k 48: f2 -> f2 : arg1'=2+4*k-arg1, [ -2+arg1>0 && k>=0 && -2-4*k+arg1>0 ], cost: 8+16*k 49: f2 -> [18] : [ 1-arg1==0 ], cost: NONTERM 50: f2 -> [18] : [ -1-arg1==0 ], cost: NONTERM 51: f2 -> f2 : arg1'=-4*k_1+arg1, [ k_1>=0 && 4*k_1-arg1<0 ], cost: 16*k_1 52: f2 -> f2 : arg1'=-2-4*k_1-arg1, [ 2+arg1<0 && k_1>=0 && 2+4*k_1+arg1<0 ], cost: 8+16*k_1 22: __init -> f2 : arg1'=arg1P_1, [], cost: 2 Chained accelerated rules (with incoming rules): Start location: __init 22: __init -> f2 : arg1'=arg1P_1, [], cost: 2 53: __init -> [18] : [], cost: NONTERM 54: __init -> [18] : [], cost: NONTERM 55: __init -> f2 : arg1'=arg1P_1+4*k, [ k>=0 && -arg1P_1-4*k>0 ], cost: 2+16*k 56: __init -> f2 : arg1'=2-arg1P_1+4*k, [ -2+arg1P_1>0 && k>=0 && -2+arg1P_1-4*k>0 ], cost: 10+16*k 57: __init -> [18] : [], cost: NONTERM 58: __init -> [18] : [], cost: NONTERM 59: __init -> f2 : arg1'=-4*k_1+arg1P_1, [ k_1>=0 && 4*k_1-arg1P_1<0 ], cost: 2+16*k_1 60: __init -> f2 : arg1'=-2-4*k_1-arg1P_1, [ 2+arg1P_1<0 && k_1>=0 && 2+4*k_1+arg1P_1<0 ], cost: 10+16*k_1 Removed unreachable locations (and leaf rules with constant cost): Start location: __init 53: __init -> [18] : [], cost: NONTERM 54: __init -> [18] : [], cost: NONTERM 55: __init -> f2 : arg1'=arg1P_1+4*k, [ k>=0 && -arg1P_1-4*k>0 ], cost: 2+16*k 56: __init -> f2 : arg1'=2-arg1P_1+4*k, [ -2+arg1P_1>0 && k>=0 && -2+arg1P_1-4*k>0 ], cost: 10+16*k 57: __init -> [18] : [], cost: NONTERM 58: __init -> [18] : [], cost: NONTERM 59: __init -> f2 : arg1'=-4*k_1+arg1P_1, [ k_1>=0 && 4*k_1-arg1P_1<0 ], cost: 2+16*k_1 60: __init -> f2 : arg1'=-2-4*k_1-arg1P_1, [ 2+arg1P_1<0 && k_1>=0 && 2+4*k_1+arg1P_1<0 ], cost: 10+16*k_1 ### Computing asymptotic complexity ### Fully simplified ITS problem Start location: __init 55: __init -> f2 : arg1'=arg1P_1+4*k, [ k>=0 && -arg1P_1-4*k>0 ], cost: 2+16*k 56: __init -> f2 : arg1'=2-arg1P_1+4*k, [ -2+arg1P_1>0 && k>=0 && -2+arg1P_1-4*k>0 ], cost: 10+16*k 58: __init -> [18] : [], cost: NONTERM 59: __init -> f2 : arg1'=-4*k_1+arg1P_1, [ k_1>=0 && 4*k_1-arg1P_1<0 ], cost: 2+16*k_1 60: __init -> f2 : arg1'=-2-4*k_1-arg1P_1, [ 2+arg1P_1<0 && k_1>=0 && 2+4*k_1+arg1P_1<0 ], cost: 10+16*k_1 Computing asymptotic complexity for rule 58 Guard is satisfiable, yielding nontermination Resulting cost NONTERM has complexity: Nonterm Found new complexity Nonterm. Obtained the following overall complexity (w.r.t. the length of the input n): Complexity: Nonterm Cpx degree: Nonterm Solved cost: NONTERM Rule cost: NONTERM Rule guard: [] NO