while (next_event_date > -1.0) {
XBT_INFO("%g:", next_event_date);
while (fes->pop_leq(next_event_date, &value, &resource)) {
while (next_event_date > -1.0) {
XBT_INFO("%g:", next_event_date);
while (fes->pop_leq(next_event_date, &value, &resource)) {