FR 2508 then FR 8394 at Barcelona
Cologne → Barcelona → Budapest
Timetable, Barcelona time
21:45FR 2508 from Cologne at the gate
18:35FR 8394 to Budapest leaves the gate
20 h 50 apart on the timetable, overnight
FR 8394 leaves 20 h 50 after FR 2508 arrives on the timetable: more than half a day, so not a connection we count.