eq(f3(A,B,C),1,[f2(A,B,C,D,E,F,G),loop_cont_f2(E,F,G)],[D=0]).
eq(f3(A,B,C),1,[f2(A,B,C,D,E,F,G)],[D=1]).
eq(f2(A,B,C,D,E,F,G),1,[f2(-1+A,H,C,D,E,F,G)],[H>=1,A>=0]).
eq(f2(A,B,C,D,E,F,G),1,[f2(-1+A,H,C,D,E,F,G)],[0>=H+1,A>=0]).
eq(f2(A,B,C,D,E,F,G),1,[f2(A,0,C,D,E,F,G)],[A>=0]).
eq(f2(A,B,C,D,A,B,E),1,[],[D=1,0>=A+1]).