init do
    `alter table comments add constraint users_fk foreign key(user_id) references users(id)`
end

process do
    transaction tx1 read_committed do
        latch
        `insert into comments(id, user_id) values (1, 1)`
    end
end

process do
    transaction tx2 read_committed do
        latch
        `insert into users(id) values (1)`
        latch
    end
end

property eventually(`select id from users` = 1 and `select count(*) from comments` = 0)