TIME: 3420


SCC: 96
=================================
Global Ranking Function: nat(1*B)

  18_loop(A,B,C) :- 18_loop(D,E,F) [1*B+ -1*E>=1,1*E>=0,1*A>=1,1*C+ -1*F= -1,1*A+ -1*D=0]
=================================