FR 4272 then FR 878 at Barcelona
Poznan → Barcelona → Venezia
Timetable, Barcelona time
17:20FR 4272 from Poznan at the gate
08:30FR 878 to Venezia leaves the gate
15 h 10 apart on the timetable, overnight
FR 878 leaves 15 h 10 after FR 4272 arrives on the timetable: more than half a day, so not a connection we count.