while (SIMIX_solve(actions_done, actions_failed) != -1.0) {
while ((action = xbt_fifo_pop(actions_failed))) {
DEBUG1("** %s failed **", action->name);
while (SIMIX_solve(actions_done, actions_failed) != -1.0) {
while ((action = xbt_fifo_pop(actions_failed))) {
DEBUG1("** %s failed **", action->name);