task = MSG_task_create("finalize", 0, 0, 0);
comm = MSG_task_isend(task, mailbox);
XBT_INFO("Send to receiver-%ld finalize", i % receivers_count);
task = MSG_task_create("finalize", 0, 0, 0);
comm = MSG_task_isend(task, mailbox);
XBT_INFO("Send to receiver-%ld finalize", i % receivers_count);