if ((time_delta < 0.0 || next_event_phy < time_delta) && next_event_phy >= 0.0) {
time_delta = next_event_phy;
}
if (surf_vm_model != nullptr) {
XBT_DEBUG("Looking for next event in virtual models");
if ((time_delta < 0.0 || next_event_phy < time_delta) && next_event_phy >= 0.0) {
time_delta = next_event_phy;
}
if (surf_vm_model != nullptr) {
XBT_DEBUG("Looking for next event in virtual models");