%Source: Ports of programs found in TPDB/C/AProVE_numeric
%query: test_fun(g,g).
% source: port of http://cl2-informatik.uibk.ac.at/mercurial.cgi/TPDB/file/72cccd64ec42/C/AProVE_numeric/svcomp_a.10.c

test_fun(X, Y) :- loop(X, Y, 0).

loop(X, Y, C) :- X =\= Y, loop_body(X, Y, C).
loop(X, Y, C) :- X =:= Y.

loop_body(X, Y, C) :- X > Y, !, Y1 is Y + 1, C1 is C + 1, loop(X, Y1, C1).
loop_body(X, Y, C) :- X =< Y, !, X1 is X + 1, C1 is C + 1, loop(X1, Y, C1).