eq(f0(A,B,C),1,[f2(A,B,1)],[A>=1]).
eq(f0(A,B,C),1,[f4(A,B,0,D,E,F,G),loop_cont_f4(E,F,G)],[D=0,0>=A]).
eq(f0(A,B,C),1,[f4(A,B,0,D,E,F,G)],[D=1,0>=A]).
eq(f4(A,B,C,D,E,F,G),1,[f4(A,B-1,C,D,E,F,G)],[B>=1]).
eq(f4(A,B,C,D,A,B,1),1,[],[D=1,0>=A,0>=B]).