can't upgrade from 14.04 to 16.04 because of ubuntu-minimum problem

[David Faust]

The summary is all that I know.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubuntu-release-upgrader-core 1:0.220.10
ProcVersionSignature: Ubuntu 3.13.0-161.211-generic 3.13.11-ckt39
Uname: Linux 3.13.0-161-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.29
Architecture: amd64
CrashDB: ubuntu
Date: Sun Nov 4 09:11:43 2018
InstallationDate: Installed on 2011-09-17 (2604 days ago)
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to trusty on 2018-11-04 (0 days ago)
VarLogDistupgradeAptlog:
 Log time: 2018-11-04 09:09:52.468914
 Log time: 2018-11-04 09:10:17.315673
 Log time: 2018-11-04 09:10:42.171208
 Log time: 2018-11-04 09:11:49.409085
VarLogDistupgradeTermlog: