eq(f3(A,B,C),1,[f1(A,B,C,D,E,F,G),loop_cont_f1(E,F,G)],[D=0,B>=C+1]).
eq(f3(A,B,C),1,[f1(A,B,C,D,E,F,G)],[D=1,B>=C+1]).
eq(f1(A,B,C,D,E,F,G),1,[f1(A,B+1,C,D,E,F,G)],[A>=B+1]).
eq(f1(A,B,C,D,E,F,G),1,[f1(A,B,C+1,D,E,F,G)],[B>=C+2,B>=A]).
eq(f1(A,B,C,D,A,B,C),0,[],[D=1]).