WARNING: state f400 is unreachable

==> main.fstb MAY NOT TERMINATE. 

Cycle with transition(s):

t11 [A = 0, B = 0, C = 0, D = 0, E = 0, F = 0, G = 0, H = 0, I = 0, J = 0, A__o = 0, B__o = 0, C__o = 0, D__o = 0, E__o = 0, F__o = 0, G__o = 2, H__o = 1, I__o = 0, J__o = 0]
 -> t13 [A = 0, B = 0, C = 0, D = 0, E = 0, F = 0, G = 0, H = 0, I = 0, J = 0, A__o = 0, B__o = 0, C__o = 0, D__o = 0, E__o = 0, F__o = 0, G__o = 2, H__o = 1, I__o = 0, J__o = 0]

is likely to be an infinite loop.