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, [ arg2==arg2P_1 ], cost: 1
      1: f2 -> f3 : arg1'=arg1P_2, arg2'=arg2P_2, [ arg1==arg1P_2 ], cost: 1
      7: f3 -> f4 : arg1'=arg1P_8, arg2'=arg2P_8, [ arg1==arg2 && arg1>0 && arg1==arg1P_8 && arg2==arg2P_8 ], cost: 1
      9: f3 -> f9 : arg1'=arg1P_10, arg2'=arg2P_10, [ arg1<=0 && arg1==arg1P_10 && arg2==arg2P_10 ], cost: 1
     10: f3 -> f9 : arg1'=arg1P_11, arg2'=arg2P_11, [ arg1<arg2 && arg1==arg1P_11 && arg2==arg2P_11 ], cost: 1
     11: f3 -> f9 : arg1'=arg1P_12, arg2'=arg2P_12, [ arg1>arg2 && arg1==arg1P_12 && arg2==arg2P_12 ], cost: 1
      2: f5 -> f6 : arg1'=arg1P_3, arg2'=arg2P_3, [ arg1P_3==-1+arg1 && arg2==arg2P_3 ], cost: 1
      3: f6 -> f7 : arg1'=arg1P_4, arg2'=arg2P_4, [ arg2P_4==-1+arg2 && arg1==arg1P_4 ], cost: 1
      5: f7 -> f4 : arg1'=arg1P_6, arg2'=arg2P_6, [ arg1==arg1P_6 && arg2==arg2P_6 ], cost: 1
      4: f4 -> f5 : arg1'=arg1P_5, arg2'=arg2P_5, [ arg2>0 && arg1==arg1P_5 && arg2==arg2P_5 ], cost: 1
      6: f4 -> f8 : arg1'=arg1P_7, arg2'=arg2P_7, [ arg2<=0 && arg1==arg1P_7 && arg2==arg2P_7 ], cost: 1
      8: f8 -> f3 : arg1'=arg1P_9, arg2'=arg2P_9, [ arg1==arg1P_9 && arg2==arg2P_9 ], cost: 1
     12: __init -> f1 : arg1'=arg1P_13, arg2'=arg2P_13, [], cost: 1

Checking for constant complexity:
   The following rule is satisfiable with cost >= 1, yielding constant complexity:
     12: __init -> f1 : arg1'=arg1P_13, arg2'=arg2P_13, [], cost: 1

Removed unreachable and leaf rules:
   Start location: __init
      0: f1 -> f2 : arg1'=arg1P_1, arg2'=arg2P_1, [ arg2==arg2P_1 ], cost: 1
      1: f2 -> f3 : arg1'=arg1P_2, arg2'=arg2P_2, [ arg1==arg1P_2 ], cost: 1
      7: f3 -> f4 : arg1'=arg1P_8, arg2'=arg2P_8, [ arg1==arg2 && arg1>0 && arg1==arg1P_8 && arg2==arg2P_8 ], cost: 1
      2: f5 -> f6 : arg1'=arg1P_3, arg2'=arg2P_3, [ arg1P_3==-1+arg1 && arg2==arg2P_3 ], cost: 1
      3: f6 -> f7 : arg1'=arg1P_4, arg2'=arg2P_4, [ arg2P_4==-1+arg2 && arg1==arg1P_4 ], cost: 1
      5: f7 -> f4 : arg1'=arg1P_6, arg2'=arg2P_6, [ arg1==arg1P_6 && arg2==arg2P_6 ], cost: 1
      4: f4 -> f5 : arg1'=arg1P_5, arg2'=arg2P_5, [ arg2>0 && arg1==arg1P_5 && arg2==arg2P_5 ], cost: 1
      6: f4 -> f8 : arg1'=arg1P_7, arg2'=arg2P_7, [ arg2<=0 && arg1==arg1P_7 && arg2==arg2P_7 ], cost: 1
      8: f8 -> f3 : arg1'=arg1P_9, arg2'=arg2P_9, [ arg1==arg1P_9 && arg2==arg2P_9 ], cost: 1
     12: __init -> f1 : arg1'=arg1P_13, arg2'=arg2P_13, [], 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
      7: f3 -> f4 : [ arg1==arg2 && arg1>0 ], cost: 1
      2: f5 -> f6 : arg1'=-1+arg1, [], cost: 1
      3: f6 -> f7 : arg2'=-1+arg2, [], cost: 1
      5: f7 -> f4 : [], cost: 1
      4: f4 -> f5 : [ arg2>0 ], cost: 1
      6: f4 -> f8 : [ arg2<=0 ], cost: 1
      8: f8 -> f3 : [], cost: 1
     12: __init -> f1 : arg1'=arg1P_13, arg2'=arg2P_13, [], cost: 1

### Simplification by acceleration and chaining ###

Eliminated locations (on linear paths):
   Start location: __init
      7: f3 -> f4 : [ arg1==arg2 && arg1>0 ], cost: 1
     16: f4 -> f3 : [ arg2<=0 ], cost: 2
     18: f4 -> f4 : arg1'=-1+arg1, arg2'=-1+arg2, [ arg2>0 ], cost: 4
     14: __init -> f3 : arg1'=arg1P_1, arg2'=arg2P_2, [], cost: 3

Accelerating simple loops of location 6.
   Accelerating the following rules:
     18: f4 -> f4 : arg1'=-1+arg1, arg2'=-1+arg2, [ arg2>0 ], cost: 4

   Accelerated rule 18 with backward acceleration, yielding the new rule 19.
[accelerate] Nesting with 1 inner and 1 outer candidates
   Removing the simple loops: 18.

Accelerated all simple loops using metering functions (where possible):
   Start location: __init
      7: f3 -> f4 : [ arg1==arg2 && arg1>0 ], cost: 1
     16: f4 -> f3 : [ arg2<=0 ], cost: 2
     19: f4 -> f4 : arg1'=-arg2+arg1, arg2'=0, [ arg2>=0 ], cost: 4*arg2
     14: __init -> f3 : arg1'=arg1P_1, arg2'=arg2P_2, [], cost: 3

Chained accelerated rules (with incoming rules):
   Start location: __init
      7: f3 -> f4 : [ arg1==arg2 && arg1>0 ], cost: 1
     20: f3 -> f4 : arg1'=-arg2+arg1, arg2'=0, [ arg1==arg2 && arg1>0 && arg2>=0 ], cost: 1+4*arg2
     16: f4 -> f3 : [ arg2<=0 ], cost: 2
     14: __init -> f3 : arg1'=arg1P_1, arg2'=arg2P_2, [], cost: 3

Eliminated locations (on tree-shaped paths):
   Start location: __init
     21: f3 -> f3 : arg1'=-arg2+arg1, arg2'=0, [ arg1==arg2 && arg1>0 && arg2>=0 ], cost: 3+4*arg2
     14: __init -> f3 : arg1'=arg1P_1, arg2'=arg2P_2, [], cost: 3

Accelerating simple loops of location 2.
   Accelerating the following rules:
     21: f3 -> f3 : arg1'=-arg2+arg1, arg2'=0, [ arg1==arg2 && arg1>0 && arg2>=0 ], cost: 3+4*arg2

   Failed to prove monotonicity of the guard of rule 21.
[accelerate] Nesting with 1 inner and 1 outer candidates

Accelerated all simple loops using metering functions (where possible):
   Start location: __init
     21: f3 -> f3 : arg1'=-arg2+arg1, arg2'=0, [ arg1==arg2 && arg1>0 && arg2>=0 ], cost: 3+4*arg2
     14: __init -> f3 : arg1'=arg1P_1, arg2'=arg2P_2, [], cost: 3

Chained accelerated rules (with incoming rules):
   Start location: __init
     14: __init -> f3 : arg1'=arg1P_1, arg2'=arg2P_2, [], cost: 3
     22: __init -> f3 : arg1'=0, arg2'=0, [ arg1P_1>0 ], cost: 6+4*arg1P_1

Removed unreachable locations (and leaf rules with constant cost):
   Start location: __init
     22: __init -> f3 : arg1'=0, arg2'=0, [ arg1P_1>0 ], cost: 6+4*arg1P_1

### Computing asymptotic complexity ###

Fully simplified ITS problem
   Start location: __init
     22: __init -> f3 : arg1'=0, arg2'=0, [ arg1P_1>0 ], cost: 6+4*arg1P_1

Computing asymptotic complexity for rule 22
   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),?)