yosys/docs/source/code_examples/techmap/mymul_test.ys

read_verilog mymul_test.v
hierarchy -check -top test

techmap -map sym_mul_map.v \
        -map mymul_map.v;;

rename test test_mapped
read_verilog mymul_test.v
miter -equiv test test_mapped miter
flatten miter

sat -verify -prove trigger 0 miter

splitnets -ports test_mapped/A
show -prefix mymul -format dot -notitle test_mapped