originally in the IPP domain collection / from the
literature. randomly generated briefcase tasks, with 10 to 20 objects
to be moved, 5 tasks of each size. random generator available by Joerg
Hoffmann on request. directory smaller_tasks contains tasks with 2 to
11 objects, randomly generated by the same program, which we used in
order to compare FF's runtime and solution length with IPP's results
--- IPP can not solve any of the larger tasks in this directory, in
fact no task with more than 6 objects. our results for the smaller
tasks are described in section 8.2
