The message "Emergency stop (core dumped)" implies that the process was halted to a core dump file that captures the memory of the application at the moment of the crash. You could use it for debugging.
Given that the difficulty (memory cost parameter) is 93400, the calculation for the memory requirement in bytes would be 93400×1024 bytes or 91.21 MB which isn't a lot, so I am not sure why you're getting an 'out of memory' error.
My recommendation is to check if something else perhaps using your computer's memory and taking it from the mining XenBlocks operation. It's possible that this amount of memory isn't available.
