Comment 10 for bug 1688508

For reference, with @paelzer patch applied ,
the following is the libvirt-guests.sh stop sequence.

root@xenial-base:/usr/lib/libvirt# ./libvirt-guests.sh stop

Running guests on default URI: guest-11, guest-16, guest-9, guest-19, guest-20, guest-23, guest-15, guest-29, guest-7, guest-39, guest-36, guest-27, guest-40, guest-14, guest-10, guest-4, guest-3, guest-28, guest-26, guest-32, guest-2, guest-25, guest-6, guest-38, guest-1, guest-35, guest-31, guest-8, guest-30, guest-12, guest-21, guest-5, guest-18, guest-0, guest-17, guest-34, guest-13, guest-24, guest-33, guest-37, guest-22
Shutting down guests on default URI...
Starting shutdown on guest: guest-11
Starting shutdown on guest: guest-16
Starting shutdown on guest: guest-9
Starting shutdown on guest: guest-19
Starting shutdown on guest: guest-20
Starting shutdown on guest: guest-23
Starting shutdown on guest: guest-15
Starting shutdown on guest: guest-29
Starting shutdown on guest: guest-7
Starting shutdown on guest: guest-39
Waiting for 41 guests to shut down, 120 seconds left
Waiting for 20 guests to shut down, 115 seconds left
Waiting for 20 guests to shut down, 110 seconds left
Waiting for 20 guests to shut down, 105 seconds left
Waiting for 20 guests to shut down, 100 seconds left
Waiting for 20 guests to shut down, 95 seconds left
Waiting for 20 guests to shut down, 90 seconds left
Waiting for 20 guests to shut down, 85 seconds left
Waiting for 20 guests to shut down, 80 seconds left
Waiting for 20 guests to shut down, 75 seconds left
Waiting for 20 guests to shut down, 70 seconds left
Waiting for 20 guests to shut down, 65 seconds left
Waiting for 20 guests to shut down, 60 seconds left
Waiting for 20 guests to shut down, 55 seconds left
Waiting for 20 guests to shut down, 50 seconds left
Waiting for 20 guests to shut down, 45 seconds left
Waiting for 20 guests to shut down, 40 seconds left
Waiting for 20 guests to shut down, 35 seconds left
Waiting for 20 guests to shut down, 30 seconds left
Waiting for 20 guests to shut down, 25 seconds left
Waiting for 20 guests to shut down, 20 seconds left
Waiting for 20 guests to shut down, 15 seconds left

Waiting for 20 guests to shut down, 10 seconds left
Waiting for 20 guests to shut down, 5 seconds left
Timeout expired while shutting down domains