# read design 
read_verilog counter.v
hierarchy -check -top counter

show -format pdf -prefix counter_00

# the high-level stuff
proc; opt; memory; opt; fsm; opt

show -format pdf -prefix counter_01

# mapping to internal cell library
techmap; splitnets -ports; opt

show -format pdf -prefix counter_02

# mapping flip-flops to mycells.lib
dfflibmap -liberty mycells.lib

# mapping logic to mycells.lib
abc -liberty mycells.lib

# cleanup
clean

show -lib mycells.v -format pdf -prefix counter_03