FR 3040 then IB 5376 at Barcelona
Prague → Barcelona → Firenze
Timetable, Barcelona time
21:15FR 3040 from Prague at the gate
21:10IB 5376 to Firenze leaves the gatealso LL 5376, VY 6076
23 h 55 apart on the timetable, overnight
IB 5376 leaves 23 h 55 after FR 3040 arrives on the timetable: more than half a day, so not a connection we count.