eq(f1(A,B,C),1,[f0(A,B,C,D,E,F,G),loop_cont_f0(E,F,G)],[D=0]).
eq(f1(A,B,C),1,[f0(A,B,C,D,E,F,G)],[D=1]).
eq(f0(A,B,C,D,E,F,G),1,[f0(A+C,B,-1+C,D,E,F,G)],[A>=1]).
eq(f0(A,B,C,D,A,E,C),1,[],[D=1,0>=A]).