# Running csa_tree twice, verify nothing changes on second run

read_verilog add_chain_8.v
hierarchy -auto-top
proc; opt_clean

csa_tree
stat
select -assert-min 1 t:$fa
select -assert-count 1 t:$add

csa_tree
stat

select -assert-min 1 t:$fa
select -assert-count 1 t:$add
select -assert-none t:$sub