&& n != trigger && qnode_get_new_color(qn, n) == col
&& nodes_interfere(chordal_env, irn, n)) {
DBG((dbg, LEVEL_4, "\t %+F\ttroubles\n", n));
&& n != trigger && qnode_get_new_color(qn, n) == col
&& nodes_interfere(chordal_env, irn, n)) {
DBG((dbg, LEVEL_4, "\t %+F\ttroubles\n", n));