SQL & PL/SQL :: Grant Privilege To Role

I have a stored procedure which when executed creates a user and grants some roles to the user and also makes certain roles DEFAULT using "alter user"

The issue comes when i execute the procedure.

I have a User who has a role and this role has the "alter user" privilege, for example lets say that the user1 has the role ABC, and role ABC has the "alter user" privilege.

SQL> grant alter user to ABC;
Grant succeeded.
SQL> grant ABC to user1;
Grant succeeded.

Now, when i run the stored procedure as the user1, it gives me an error on a line saying "insufficient privileges", when i check the line, its this line:
alter user user1 DEFAULT ROLE "ROLE1", "ROLE2"

But as far as i know the user1 has the "alter user" privilege

I want to make those two roles ROLE1, ROLE2 DEFAULT because i don't want the other roles ROLE3,ROLE4 to be default, as you know if there are many roles and if we alter user with default for certain roles other roles become DEFAULT=NO.

So i get the error at "alter user" statement though the user has the "alter user" privilege, what do you think might be wrong?

OR is there anyway to grant roles to the user with default=NO option?