Virtuoso crashes frequently (about every 10 seconds)

Virtuoso crashes and restarts frequently. WHen I look in /var/log/syslog it seems that it crashes about every 5-10 seconds..! (which is really insane)

I have ran apport-retrace using the dump I found in /var/crash. I have put this first part below, the complete retrace file is available in the attachment.

Please let me know if I need to provide other details.

ProblemType: Crash
Architecture: amd64
CrashCounter: 1
Date: Sun Dec 29 19:24:36 2013
Dependencies:
 apt-utils 0.9.9.1~ubuntu3
 debconf 1.5.50ubuntu1
 debconf-i18n 1.5.50ubuntu1
 dpkg 1.16.12ubuntu1
 gcc-4.8-base 4.8.1-10ubuntu9
 libapt-inst1.5 0.9.9.1~ubuntu3
 libapt-pkg4.12 0.9.9.1~ubuntu3
 libasn1-8-heimdal 1.6~git20120403+dfsg1-3ubuntu0.1
 libbz2-1.0 1.0.6-4
 libc6 2.17-93ubuntu4
 libcomerr2 1.42.8-1ubuntu1
 libdb5.1 5.1.29-7
 libgcc1 1:4.8.1-10ubuntu9
 libgcrypt11 1.5.0-3ubuntu3
 libgnutls26 2.12.23-1ubuntu4
 libgpg-error0 1.12-0.2
 libgssapi3-heimdal 1.6~git20120403+dfsg1-3ubuntu0.1
 libhcrypto4-heimdal 1.6~git20120403+dfsg1-3ubuntu0.1
 libheimbase1-heimdal 1.6~git20120403+dfsg1-3ubuntu0.1
 libheimntlm0-heimdal 1.6~git20120403+dfsg1-3ubuntu0.1
 libhx509-5-heimdal 1.6~git20120403+dfsg1-3ubuntu0.1
 libkrb5-26-heimdal 1.6~git20120403+dfsg1-3ubuntu0.1
 libldap-2.4-2 2.4.31-1+nmu2ubuntu3
 liblocale-gettext-perl 1.05-7build2
 liblzma5 5.1.1alpha+20120614-2ubuntu1
 libp11-kit0 0.18.3-2ubuntu1
 libpcre3 1:8.31-2
 libreadline6 6.2-9ubuntu1
 libroken18-heimdal 1.6~git20120403+dfsg1-3ubuntu0.1
 libsasl2-2 2.1.25.dfsg1-17
 libsasl2-modules 2.1.25.dfsg1-17
 libsasl2-modules-db 2.1.25.dfsg1-17
 libselinux1 2.1.13-2
 libsqlite3-0 3.7.17-1ubuntu1
 libssl1.0.0 1.0.1e-3ubuntu1
 libstdc++6 4.8.1-10ubuntu9
 libtasn1-3 2.14-3
 libtext-charwidth-perl 0.04-7build2
 libtext-iconv-perl 1.7-5build1
 libtext-wrapi18n-perl 0.06-7
 libtinfo5 5.9+20130608-1ubuntu1
 libwind0-heimdal 1.6~git20120403+dfsg1-3ubuntu0.1
 multiarch-support 2.17-93ubuntu4
 perl-base 5.14.2-21build1
 readline-common 6.2-9ubuntu1
 tar 1.26+dfsg-8
 zlib1g 1:1.2.8.dfsg-1ubuntu1
Disassembly:
 => 0x939d75: movq $0xffffffffffffffff,(%rax)
    0x939d7c: lea 0x94d9c5(%rip),%rax # 0x1287748
    0x939d83: mov (%rax),%rax
    0x939d86: test %rax,%rax
    0x939d89: jne 0x939d95
    0x939d8b: mov $0x1,%edi
    0x939d90: callq 0x409d70 <exit@plt>
    0x939d95: lea 0x94d9ac(%rip),%rax # 0x1287748
    0x939d9c: mov (%rax),%rax
    0x939d9f: mov $0x1,%edi
    0x939da4: callq *%rax
    0x939da6: mov $0x0,%eax
    0x939dab: leaveq
    0x939dac: retq
    0x939dad: push %rbp
    0x939dae: mov %rsp,%rbp
DistroRelease: Ubuntu 13.10
ExecutablePath: /usr/bin/virtuoso-t
ExecutableTimestamp: 1380028829
Package: virtuoso-opensource-6.1-bin 6.1.6+repack-0ubuntu3
PackageArchitecture: amd64
ProcCmdline: /usr/bin/virtuoso-t +foreground +configfile /tmp/virtuoso_yG2555.ini +wait
ProcCwd: /home/user/.kde/share/apps/nepomuk/repository/main/data/virtuosobackend