==> YES, main.fstb terminates. max_dim = 2

+-----------------------------------------------------------------------------+
|                             Ranking Function                                |
+-----------------------------------------------------------------------------+

state start:
1

state a:
0
A

state ____start:
2


+-----------------------------------------------------------------------------+
|                         Worst Case Execution Time                           |
+-----------------------------------------------------------------------------+

/---
/
| -1*A__o' >= 0
| 1 >= 0
\

1+1

/
| -1+A__o' >= 0
| 1 >= 0
\

(1+(1+A__o'))+1

\---