Hit http://archive.ubuntu.com xenial-updates/universe amd64 Packages
Hit http://archive.ubuntu.com xenial-updates/multiverse amd64 Packages
Hit http://archive.ubuntu.com xenial-updates/main i386 Packages
Hit http://archive.ubuntu.com xenial-updates/restricted i386 Packages
Hit http://archive.ubuntu.com xenial-updates/universe i386 Packages
Hit http://archive.ubuntu.com xenial-updates/multiverse i386 Packages
Hit http://archive.ubuntu.com xenial-updates/main Translation-en
Hit http://archive.ubuntu.com xenial-updates/multiverse Translation-en
Hit http://archive.ubuntu.com xenial-updates/restricted Translation-en
Hit http://archive.ubuntu.com xenial-updates/universe Translation-en
Hit http://archive.ubuntu.com xenial-backports/main Sources
Hit http://archive.ubuntu.com xenial-backports/restricted Sources
Hit http://archive.ubuntu.com xenial-backports/universe Sources
Hit http://archive.ubuntu.com xenial-backports/multiverse Sources
Hit http://archive.ubuntu.com xenial-backports/main amd64 Packages
Hit http://archive.ubuntu.com xenial-backports/restricted amd64 Packages
Hit http://archive.ubuntu.com xenial-backports/universe amd64 Packages
Hit http://archive.ubuntu.com xenial-backports/multiverse amd64 Packages
Hit http://archive.ubuntu.com xenial-backports/main i386 Packages
Hit http://archive.ubuntu.com xenial-backports/restricted i386 Packages
Hit http://archive.ubuntu.com xenial-backports/universe i386 Packages
Hit http://archive.ubuntu.com xenial-backports/multiverse i386 Packages
Hit http://archive.ubuntu.com xenial-backports/main Translation-en
Hit http://archive.ubuntu.com xenial-backports/multiverse Translation-en
Hit http://archive.ubuntu.com xenial-backports/restricted Translation-en
Hit http://archive.ubuntu.com xenial-backports/universe Translation-en
Hit http://archive.ubuntu.com xenial/main Sources
Hit http://archive.ubuntu.com xenial/restricted Sources
Hit http://archive.ubuntu.com xenial/universe Sources
Hit http://archive.ubuntu.com xenial/multiverse Sources
Hit http://archive.ubuntu.com xenial/main amd64 Packages
Hit http://archive.ubuntu.com xenial/restricted amd64 Packages
Hit http://archive.ubuntu.com xenial/universe amd64 Packages
Hit http://archive.ubuntu.com xenial/multiverse amd64 Packages
Hit http://archive.ubuntu.com xenial/main i386 Packages
Hit http://archive.ubuntu.com xenial/restricted i386 Packages
Hit http://archive.ubuntu.com xenial/universe i386 Packages
Hit http://archive.ubuntu.com xenial/multiverse i386 Packages
Hit http://archive.ubuntu.com xenial/main Translation-en
Hit http://archive.ubuntu.com xenial/multiverse Translation-en
Hit http://archive.ubuntu.com xenial/restricted Translation-en
Hit http://archive.ubuntu.com xenial/universe Translation-en
Fetched 0 B in 6s (23.1 MB/s)
Checking package manager
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating the changes
Calculating the changes
Could not calculate the upgrade
An unresolvable problem occurred while calculating the upgrade.
This can be caused by:
* Upgrading to a pre-release version of Ubuntu
* Running the current pre-release version of Ubuntu
* Unofficial software packages not provided by Ubuntu
If none of this applies, then please report this bug using the
command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal.
Restoring original system state
Aborting
Reading package lists... Done
Building dependency tree
Reading state information... Done
=== Command detached from window (Thu Apr 21 22:20:00 2016) ===