2018-02-13 19:38:49,689 INFO Using config files '['./DistUpgrade.cfg.xenial']'
2018-02-13 19:38:49,689 INFO uname information: 'Linux rvsouja-Gateway-NE46Rs 4.4.0-112-generic #135-Ubuntu SMP Fri Jan 19 11:48:36 UTC 2018 x86_64'
2018-02-13 19:38:50,181 INFO apt version: '1.2.24'
2018-02-13 19:38:50,182 INFO python version: '3.5.2 (default, Nov 23 2017, 16:37:01) 
[GCC 5.4.0 20160609]'
2018-02-13 19:38:50,188 INFO release-upgrader version '17.10.8' started
2018-02-13 19:38:50,263 INFO locale: 'en_IN' 'ISO8859-1'
2018-02-13 19:38:50,331 INFO screen could not be run
2018-02-13 19:38:52,404 DEBUG Using 'DistUpgradeViewText' view
2018-02-13 19:38:52,514 DEBUG enable dpkg --force-overwrite
2018-02-13 19:38:53,163 DEBUG creating statefile: '/var/log/dist-upgrade/apt-clone_system_state.tar.gz'
2018-02-13 19:39:00,948 DEBUG lsb-release: 'xenial'
2018-02-13 19:39:00,950 DEBUG _pythonSymlinkCheck run
2018-02-13 19:39:00,988 DEBUG openCache()
2018-02-13 19:39:00,988 DEBUG No such plugin directory: ./plugins
2018-02-13 19:39:00,988 DEBUG plugins for condition 'PreCacheOpen' are '[]'
2018-02-13 19:39:00,988 DEBUG plugins for condition 'artfulPreCacheOpen' are '[]'
2018-02-13 19:39:00,988 DEBUG plugins for condition 'from_xenialPreCacheOpen' are '[]'
2018-02-13 19:39:00,988 DEBUG quirks: running PreCacheOpen
2018-02-13 19:39:00,989 DEBUG running Quirks.PreCacheOpen
2018-02-13 19:39:01,858 DEBUG /openCache(), new cache size 89436
2018-02-13 19:39:01,858 DEBUG Have broken pkgs, trying to fix them
2018-02-13 19:39:02,330 ERROR self.prepared() failed