warning: Ignored call to loop_cont_ack/2 in equation start/2 
Inferred cost of ack(A,B,C,D,E): 
ack(A,B,C,D,E):[10]: 0
  with precondition: [C=1,D=A,E=B] 

ack(A,B,C,D,E):[[8,9],10]: inf
  with precondition: [C=1,A>=1,B>=1,D>=0,A>=D] 

Inferred cost of start(A,B): 
start(A,B):[12]: 1
  with precondition: [] 

start(A,B):[13]: inf
  with precondition: [A>=1,B>=1] 

Solved cost expressions of start(A,B): 
start(A,B):[12]: 1  with precondition: [] 
start(A,B):[13]: inf  with precondition: [A>=1,B>=1] 
Maximum cost of start(A,B): inf 
Asymptotic class: infinity 
Time statistics: 
Partial evaluation computed in 2 ms.
Invariants computed in 9 ms.
----Backward Invariants 4 ms.
----Transitive Invariants 1 ms.
Refinement performed in 8 ms.
Termination proved in 3 ms.
Upper bounds computed in 8 ms.
----Phase cost structures 3 ms.
--------Equation cost structures 2 ms.
--------Inductive compression(1) 0 ms.
--------Inductive compression(2) 0 ms.
--------Black Cost 0 ms.
----Chain cost structures 3 ms.
----Solving cost expressions 0 ms.

Compressed phase information: 0 
Compressed Chains: 0 
Compressed invariants: 0 
Total analysis performed in 37 ms.