yosys/tests/arch/ice40/fsm.ys

read_verilog ../common/fsm.v
hierarchy -top fsm
proc
flatten

equiv_opt -run :prove -map +/ice40/cells_sim.v synth_ice40
miter -equiv -make_assert -flatten gold gate miter
sat -verify -prove-asserts -show-public -set-at 1 in_reset 1 -seq 20 -prove-skip 1 miter

design -load postopt # load the post-opt design (otherwise equiv_opt loads the pre-opt design)
cd fsm # Constrain all select calls below inside the top module

select -assert-count 4 t:SB_DFF
select -assert-count 2 t:SB_DFFESR
select -assert-max 15 t:SB_LUT4
select -assert-none t:SB_DFFESR t:SB_DFF t:SB_LUT4 %% t:* %D