IB 5373 then IB 5944 at Barcelona
Firenze → Barcelona → Strasbourg
Timetable, Barcelona time
10:00IB 5373 from Firenze at the gatealso LL 5373, VY 6073
05:50IB 5944 to Strasbourg leaves the gatealso LL 5944, VY 8144
19 h 50 apart on the timetable, overnight
IB 5944 leaves 19 h 50 after IB 5373 arrives on the timetable: more than half a day, so not a connection we count.