read_verilog -specify boxes.v
clean

# wb = 4w1c, bb = 3w1c, top = 3w1c
select =wb
select -assert-count 5 %
select -add =bb
select -assert-count 9 %
select -del =wb
select -assert-count 4 %

# unions
select -assert-count 8 =bb * %u
select -assert-count 8 * =bb %u
select -assert-count 13 top =* %u
select -assert-count 8 =bb top %u
select -assert-count 8 top =bb %u

# intersections
select -assert-count 3 =w:* =bb %i
select -assert-count 4 =* * %i
select -assert-count 4 * =* %i

# inverses
select -assert-count 8 =wb %n
select -assert-none top %n
select -assert-none * %n
select -assert-none =* %n
select -assert-count 9 =top %n

# differences
select -assert-count 9 =* top %d
select -assert-count 0 top =* %d
select -assert-count 9 =* * %d
select -assert-count 0 * =* %d

# random
select -assert-any =?b %R