Found a strange issue running the tool when it encountered a third crash. Error output:
[-] SYSTEM ERROR : Unable to create './out/default/crashes/id:000002,sig:11,src:000515,time:8411754,execs:681687,op:havoc,rep:16' Stop location : save_if_interesting(), src/afl-fuzz-bitmap.c:814 OS message : Invalid argument
It was able to create two other files fine so I am not sure what exactly is going wrong here.