W4 6012 then FR 4891 at Fiumicino
Madrid → Rome → Catania
Timetable, Rome time
11:55W4 6012 from Madrid at the gate
11:35FR 4891 to Catania leaves the gate
23 h 40 apart on the timetable, overnight
FR 4891 leaves 23 h 40 after W4 6012 arrives on the timetable: more than half a day, so not a connection we count.