Trying to load file: main.koat

Initial Control flow graph problem:
  Start location: evalfstart
      0: evalfstart -> evalfentryin : [], cost: 1
      1: evalfentryin -> evalfbb3in : A'=B, B'=A, [ A>=1 && B>=1+A ], cost: 1
      2: evalfbb3in -> evalfreturnin : [ 0>=A ], cost: 1
      3: evalfbb3in -> evalfbb4in : [ A>=1 ], cost: 1
     11: evalfreturnin -> evalfstop : [], cost: 1
      6: evalfbb4in -> evalfreturnin : [], cost: 1
      4: evalfbb4in -> evalfbbin : [ 0>=1+free ], cost: 1
      5: evalfbb4in -> evalfbbin : [ free_1>=1 ], cost: 1
      7: evalfbbin -> evalfbb1in : [ B>=1+A ], cost: 1
      8: evalfbbin -> evalfbb2in : [ A>=B ], cost: 1
      9: evalfbb1in -> evalfbb3in : A'=1+A, [], cost: 1
     10: evalfbb2in -> evalfbb3in : A'=-B+A, [], cost: 1

Removing duplicate transition: 4.

Simplified the transitions:
  Start location: evalfstart
      0: evalfstart -> evalfentryin : [], cost: 1
      1: evalfentryin -> evalfbb3in : A'=B, B'=A, [ A>=1 && B>=1+A ], cost: 1
      3: evalfbb3in -> evalfbb4in : [ A>=1 ], cost: 1
      5: evalfbb4in -> evalfbbin : [], cost: 1
      7: evalfbbin -> evalfbb1in : [ B>=1+A ], cost: 1
      8: evalfbbin -> evalfbb2in : [ A>=B ], cost: 1
      9: evalfbb1in -> evalfbb3in : A'=1+A, [], cost: 1
     10: evalfbb2in -> evalfbb3in : A'=-B+A, [], cost: 1


Applied simple chaining:
  Start location: evalfstart
      0: evalfstart -> evalfbb3in : A'=B, B'=A, [ A>=1 && B>=1+A ], cost: 2
      3: evalfbb3in -> evalfbbin : [ A>=1 ], cost: 2
      7: evalfbbin -> evalfbb3in : A'=1+A, [ B>=1+A ], cost: 2
      8: evalfbbin -> evalfbb3in : A'=-B+A, [ A>=B ], cost: 2


Applied chaining over branches and pruning:
  Start location: evalfstart
      0: evalfstart -> evalfbb3in : A'=B, B'=A, [ A>=1 && B>=1+A ], cost: 2
     12: evalfbb3in -> evalfbb3in : A'=1+A, [ A>=1 && B>=1+A ], cost: 4
     13: evalfbb3in -> evalfbb3in : A'=-B+A, [ A>=1 && A>=B ], cost: 4

Eliminating 2 self-loops for location evalfbb3in
  Self-Loop 12 has the metering function: B-A, resulting in the new transition 14.
  Removing the self-loops: 12 13.
Adding an epsilon transition (to model nonexecution of the loops): 16.

Removed all Self-loops using metering functions (where possible):
  Start location: evalfstart
      0: evalfstart -> evalfbb3in : A'=B, B'=A, [ A>=1 && B>=1+A ], cost: 2
     14: evalfbb3in -> [9] : A'=B, [ A>=1 && B>=1+A ], cost: 4*B-4*A
     15: evalfbb3in -> [9] : A'=-B+A, [ A>=1 && A>=B ], cost: 4
     16: evalfbb3in -> [9] : [], cost: 0


Applied chaining over branches and pruning:
  Start location: evalfstart
    <empty>


Final control flow graph problem, now checking costs for infinitely many models:
  Start location: evalfstart
    <empty>


Computing complexity for remaining 0 transitions.


The final runtime is determined by this resulting transition:
  Final Guard: 
  Final Cost:  1

Obtained the following complexity w.r.t. the length of the input n:
  Complexity class: const
  Complexity value: 0

WORST_CASE(Omega(1),?)