Path 1: 12 calls (0.86)

→ year 2004 (11) 2001 (1)

→ month 2 (2) 1 (1) 3 (1) 4 (1) 5 (1) 6 (1) 7 (1) 8 (1) 9 (1) 10 (1)

↩ return (2001, 3) (1) (2004, 2) (1) (2004, 3) (1) (2004, 4) (1) (2004, 5) (1) (2004, 6) (1) (2004, 7) (1) (2004, 8) (1) (2004, 9) (1) (2004, 10) (1)

2 run 1 not run

1def _nextmonth(year, month):
2    if month == 12:
3        return year+1, 1
4    else:
5        return year, month+1
            

Path 2: 2 calls (0.14)

→ year 9999 (1) 2004 (1)

→ month 12 (2)

↩ return (10000, 1) (1) (2005, 1) (1)

2 run 1 not run

1def _nextmonth(year, month):
2    if month == 12:
3        return year+1, 1
4    else:
5        return year, month+1