Do you have the last few entries prior to the crash? If you want to keep them out of public feel free to PM them to me.
Some random thoughts on the issue would be that the bot didn't actually crash, but the PHP processes (multiple, as there is one for StartBot.php and one for Main.php) being killed by the system.
Depending on if you have a custom php.ini or not, the errors would likely be logged in php's own error log.