psql: id SERIAL PRIMARY KEY not starting with 1? This is something I don't understand, can somebody explain?

I create a table

CREATE TABLE cali (id SERIAL PRIMARY KEY,
    ALK_from char,
    ALK_to char,
    AND_from char,
    AND_to char);


Then I simply try to insert some data from a csv file like so

\COPY cali FROM '/home/.../data/output/id_cali.csv' (FORMAT CSV);


Which gives me this Error:

ERROR:  value "4372840000" is out of range for type integer
CONTEXT:  COPY cali, line 1, column id: "4372840000"


I know that 4372840000 results in an integer overflow. That is why I'm trying to insert the values as chars in the first place. 

But my understanding is that id SERIAL PRIMARY KEY is some sort of auto increment why is the value 4372840000 used for the column id?

The file looks like this

4372840012,4372840013,13,14,
4372840014,4372840014,15,15,
The table should be
create table cali (
    id serial primary key,
    alk_from bigint,
    alk_to bigint,
    and_from int,
    and_to int
);

And do
\COPY cali (alk_from, alk_to, and_from, and_to) 
FROM '/home/.../data/output/id_cali.csv' 
(FORMAT CSV);

So that it knows to not insert into the id serial column. The serial type is not a true type. From the manual:

The data types smallserial, serial and bigserial are not true types, but merely a notational convenience for creating unique identifier columns (similar to the AUTO_INCREMENT property supported by some other databases)
Thus, we have created an integer column and arranged for its default values to be assigned from a sequence generator