root:
             product   file:plan.py
             product   step:./plan.py

file:plan.py
               state = CONFIRMED
             creator   root:
                sink   step:./plan.py

step:./plan.py
               state = SUCCEEDED
                need = PLAN
           using_env = STEPUP_PATH_FILTER [dynamic]
             creator   root:
              source   file:plan.py
             product   st:dir_inp/
             product   step:cp ../dir_inp/inp.txt ../dir_out/out.txt; cp ../dir_inp/inp.txt ../dir_vol/vol.txt  # wd=dir_work

st:dir_inp/
             creator   step:./plan.py
             product   file:dir_inp/inp.txt

step:cp ../dir_inp/inp.txt ../dir_out/out.txt; cp ../dir_inp/inp.txt ../dir_vol/vol.txt  # wd=dir_work
               state = SUCCEEDED
                need = DEFAULT
             creator   step:./plan.py
              source   file:dir_inp/inp.txt
             product   file:dir_out/out.txt
             product   file:dir_vol/vol.txt
                sink   file:dir_out/out.txt
                sink   file:dir_vol/vol.txt

file:dir_inp/inp.txt
               state = CONFIRMED
             creator   st:dir_inp/
                sink   step:cp ../dir_inp/inp.txt ../dir_out/out.txt; cp ../dir_inp/inp.txt ../dir_vol/vol.txt  # wd=dir_work

file:dir_out/out.txt
               state = BUILT
             creator   step:cp ../dir_inp/inp.txt ../dir_out/out.txt; cp ../dir_inp/inp.txt ../dir_vol/vol.txt  # wd=dir_work
              source   step:cp ../dir_inp/inp.txt ../dir_out/out.txt; cp ../dir_inp/inp.txt ../dir_vol/vol.txt  # wd=dir_work

file:dir_vol/vol.txt
               state = VOLATILE
             creator   step:cp ../dir_inp/inp.txt ../dir_out/out.txt; cp ../dir_inp/inp.txt ../dir_vol/vol.txt  # wd=dir_work
              source   step:cp ../dir_inp/inp.txt ../dir_out/out.txt; cp ../dir_inp/inp.txt ../dir_vol/vol.txt  # wd=dir_work
