Is this WPA2 Password uncrackable?

[hashbandit]

It means :

Code:

hashcat64.exe -m 2500 -1 ?d?u?l  davehash.hccapx ?1?1?1?1?1?1?1?1?1?1?1?1

Hint: I don't know your graphic card but it will last some months ;-)

But is it possible to crack a 12 character password? What is the issue with this command. What command do I need to use? What am i doing wrong etc 


 can you please help me.
Thanks for the reply