FR 4584 then EC 7656 at Barcelona
Porto → Barcelona → Lisbon
Timetable, Barcelona time
11:05FR 4584 from Porto at the gate
10:50EC 7656 to Lisbon leaves the gate
23 h 45 apart on the timetable, overnight
EC 7656 leaves 23 h 45 after FR 4584 arrives on the timetable: more than half a day, so not a connection we count.