==> main.fstb MAY NOT TERMINATE. 

Cycle with transition(s):

t4 [A = 0, B = 0, C = 0, D = 0, E = 0, F = 0, G = 0, H = 0, I = 0, J = 1, K = 0, L = 0, M = 0, N = 0, O = 0, P = 0, Q = 0, R = 0, S = 0, T = 0, U = 0, V = 0, W = 0, X = 0, Y = 0, Z = 0, A1 = 0, B1 = 0, C1 = 0, D1 = 0, E1 = 0, F1 = 0, G1 = 0, A__o = 0, B__o = 0, C__o = 0, D__o = 0, E__o = 0, F__o = 0, G__o = 0, H__o = 0, I__o = 0, J__o = 1, K__o = 0, L__o = 0, M__o = 0, N__o = 0, O__o = 0, P__o = 0, Q__o = 0, R__o = 0, S__o = 0, T__o = 0, U__o = 0, V__o = 0, W__o = 0, X__o = 0, Y__o = 0, Z__o = 0, A1__o = 0, B1__o = 0, C1__o = 0, D1__o = 0, E1__o = 0, F1__o = 0, G1__o = 0]

is likely to be an infinite loop.