FR 3613 then FR 572 at Madrid
Prague → Madrid → Porto
Timetable, Madrid time
18:10FR 3613 from Prague at the gate
16:40FR 572 to Porto leaves the gate
22 h 30 apart on the timetable, overnight
FR 572 leaves 22 h 30 after FR 3613 arrives on the timetable: more than half a day, so not a connection we count.