FR 9602 then FR 4856 at Fiumicino
Madrid → Rome → Catania
Timetable, Rome time
16:40FR 9602 from Madrid at the gate
08:25FR 4856 to Catania leaves the gate
15 h 45 apart on the timetable, overnight
FR 4856 leaves 15 h 45 after FR 9602 arrives on the timetable: more than half a day, so not a connection we count.