proc rn { net_name } {
puts " "
puts "Net name : $net_name : "
set name_rule [dbget [dbget top.nets.name $net_name -p].rule.name]
set flag_clk [dbget [dbget top.nets.name ￥net_name -p].isClock]
set driver_pins [ dbget [dbget -p1 [dbget -p1 top.nets.name $net_name].instTerms.isOutput 1].name]
set driver_name [dbget [dbget -p1 top.insts.instTerms.name $driver_pins].inst.name]
set driver_ref_name [dbget [dbget top.insts.name $driver_name -p].cell.name]
puts "Nondefual"