FR 574 then LA 5753 at Barcelona
Bologna → Barcelona → Catania
Timetable, Barcelona time
20:15FR 574 from Bologna at the gate
17:15LA 5753 to Catania leaves the gate
21 h apart on the timetable, overnight
LA 5753 leaves 21 h after FR 574 arrives on the timetable: more than half a day, so not a connection we count.