I have just installed asterisk 13.18.5 on CentOS7. After logging in as root, I was having the same problem and I just did "SELINUX=disabled" in /var/selinux/config and that was all. My asterisk started in verbose mode by doing asterisk -rvvvvvv. No errors !!!
Another way to get it done is to use "asterisk -&" command first and then wait for a while for an "OK" message from asterisk and then "asterisk -rvvvvv"
