wire_res_per_unit 0.01660  #ohm#
wire_cap_per_unit 0.027000 #fF#

driver 2615.590088 2958.229004 180.000000 # source coordinate x, y, driver_resistance(ohm),
                                           the index of source node is default 0#
number_of_sinks 269                       # number of sinks #
sink 1 3380.000000 270.000000 500.000000 0.000000 # sink index, coordinate x, y, sink cap (fF), required arrival time (ps) # 
sink 2 3020.000000 270.000000 500.000000 0.000000 
...

number_of_candidate_nodes 268    # number of internal nodes #
candidate 20000 5220.000000 5560.000000    # node index, coordinate x and y #
candidate 20001 4880.000000 5560.000000
...

edge 0 20000          #edge start node index, end node index#
edge 20000 1
edge 20000 20001
edge 20001 2