Do one thing you just print the criteria object like
$dataProvider = new CActiveDataProvider('Pegawai', array(
'criteria' => array(
'select' => array(
'`pen`.*',
'`u`.`nama_univ` AS `nama_univ`',
'`j`.`singkatan` AS `singkatan`'
),
'join' => 'JOIN `Penilaian` AS `pen` ON `pen`.`no_test` = `t`.`no_test`',
'join' => 'JOIN `Universitas` AS `u` ON `u`.`id` = `t`.`no_test`',
'join' => 'JOIN `Jurusan` AS `j` ON `j`.`id` = `t`.`no_test`',
)
));
echo "<pre>";
print_r($dataProvider); //Check the object or try to post it below
exit();