Ubuntu fails upgrading 13.10 to 14.04

[Omri Oren]

This is the error from the upgrade command:

"""
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
"""

The main.log ended with:
$ tail /var/log/dist-upgrade/20140427-1203/main.log
2014-04-27 11:51:52,962 DEBUG running doUpdate() (showErrors=True)
2014-04-27 11:52:12,356 DEBUG openCache()
2014-04-27 11:52:12,359 DEBUG failed to SystemUnLock() (E:Not locked)
2014-04-27 11:52:15,164 DEBUG /openCache(), new cache size 70628
2014-04-27 11:52:15,164 DEBUG need_server_mode(): run in 'desktop' mode, (because of pkg 'ubuntu-desktop')
2014-04-27 11:52:16,237 ERROR Dist-upgrade failed: 'E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.'
2014-04-27 11:52:16,238 DEBUG abort called
2014-04-27 11:52:16,240 DEBUG openCache()
2014-04-27 11:52:19,121 DEBUG /openCache(), new cache size 67328
2014-04-27 11:52:19,122 DEBUG enabling apt cron job

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: ubuntu-release-upgrader-core 1:0.205.6
ProcVersionSignature: Ubuntu 3.11.0-20.34-generic 3.11.10.6
Uname: Linux 3.11.0-20-generic x86_64
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
CrashDB: ubuntu
Date: Sun Apr 27 11:56:37 2014
InstallationDate: Installed on 2013-07-18 (282 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to saucy on 2014-04-27 (0 days ago)

[Ubuntu Foundations Team Bug Bot (crichton)]

You seem to have installed the cinnamon package on Ubuntu 13.10. Unfortunately, that package is not available yet for 14.04. To upgrade to Ubuntu 14.04 LTS you'll need to either wait for a fix for cinnamon to be available or uninstall the package and then upgrade.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]