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FA-94496 / Exam timetabling constraints / Open access

Exclusive exam conflicts with itself · case 01

Every exclusive-room constraint is reported even when the exam is alone.

Verified by executionVariant 1 · 8 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

The count of exams in the period includes the exclusive exam itself and allows none.

THE FAILURE

The count of exams in the period includes the exclusive exam itself and allows none.

Unsuccessful approach: Allowing one other exam permits a shared period.

Case contract

timetable maps exam -> period index, exams exam -> duration, periods -> duration. Duration violations (exam longer than its period) are listed first by exam id; then for each constraint in order: after (a must be in a strictly later period than b), exclusion (different periods), coincidence (same period), exclusive (a must be alone in its period). Return violation rows.

Why this case matters

Hard-constraint validation gates every candidate exam timetable.

1 / The failure

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(timetable, exams, periods, cons):
    out = []
    for e in sorted(timetable):
        if exams[e] > periods[timetable[e]]:
            out.append(['duration', e])
    for kind, a, b in cons:
        pa, pb = timetable[a], timetable[b]
        if kind == 'after' and not pa > pb:
            out.append([kind, a, b])
        elif kind == 'exclusion' and pa == pb:
            out.append([kind, a, b])
        elif kind == 'coincidence' and pa != pb:
            out.append([kind, a, b])
        elif kind == 'exclusive' and sum(1 for e in timetable if timetable[e] == pa) >= 1:
            out.append([kind, a, b])
    return out
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('regression: exclusive counts self 1',
   [{'A': 1, 'B': 0}, {'A': 120, 'B': 90}, [90, 120], [['exclusive', 'A', 'B']]], []),
  ('regression variant: exclusive counts self 2',
   [{'MATH101': 3, 'PHYS110': 0, 'MATH101H': 2}, {'MATH101': 120, 'MATH101H': 180, 'PHYS110': 180},
    [180, 90, 180, 180], [['exclusive', 'PHYS110', 'MATH101'], ['coincidence', 'PHYS110', 'MATH101H']]],
   [['coincidence', 'PHYS110', 'MATH101H']]),
  ('partial repair guard 3',
   [{'CHEM120': 2, 'MATH101H': 2, 'PHYS110': 3, 'MATH101': 3},
    {'MATH101': 90, 'MATH101H': 180, 'PHYS110': 180, 'CHEM120': 180}, [180, 90, 180, 180],
    [['exclusive', 'MATH101H', 'PHYS110'], ['coincidence', 'CHEM120', 'PHYS110']]],
   [['exclusive', 'MATH101H', 'PHYS110'], ['coincidence', 'CHEM120', 'PHYS110']]),
  ('normal control 4',
   [{'PHYS110': 2, 'MATH101': 2, 'MATH101H': 1, 'CHEM120': 2},
    {'MATH101': 180, 'MATH101H': 120, 'PHYS110': 180, 'CHEM120': 90}, [180, 120, 90, 90],
    [['exclusive', 'CHEM120', 'MATH101'], ['coincidence', 'MATH101H', 'MATH101'],
     ['exclusion', 'MATH101H', 'MATH101']]],
   [['duration', 'MATH101'], ['duration', 'PHYS110'], ['exclusive', 'CHEM120', 'MATH101'],
    ['coincidence', 'MATH101H', 'MATH101']]),
  ('normal control 5',
   [{'PHYS110': 3, 'MATH101': 0, 'MATH101H': 3}, {'MATH101': 120, 'MATH101H': 120, 'PHYS110': 90},
    [180, 90, 180, 90], [['coincidence', 'MATH101', 'PHYS110'], ['after', 'PHYS110', 'MATH101']]],
   [['duration', 'MATH101H'], ['coincidence', 'MATH101', 'PHYS110']]),
  ('normal control 6',
   [{'CHEM120': 0, 'MATH101': 3, 'MATH101H': 1, 'PHYS110': 1, 'BIO130': 2},
    {'MATH101': 180, 'MATH101H': 180, 'PHYS110': 90, 'CHEM120': 180, 'BIO130': 120}, [90, 180, 90, 90],
    [['coincidence', 'MATH101', 'CHEM120'], ['exclusive', 'CHEM120', 'MATH101'],
     ['coincidence', 'MATH101H', 'MATH101'], ['after', 'PHYS110', 'CHEM120']]],
   [['duration', 'BIO130'], ['duration', 'CHEM120'], ['duration', 'MATH101'],
    ['coincidence', 'MATH101', 'CHEM120'], ['coincidence', 'MATH101H', 'MATH101']]),
  ('normal control 7',
   [{'MATH101': 3, 'MATH101H': 3, 'CHEM120': 1, 'HIST140': 2, 'PHYS110': 1, 'BIO130': 0},
    {'MATH101': 180, 'MATH101H': 120, 'PHYS110': 120, 'CHEM120': 180, 'BIO130': 90, 'HIST140': 180},
    [120, 90, 180, 180], [['after', 'MATH101H', 'PHYS110'], ['coincidence', 'BIO130', 'MATH101']]],
   [['duration', 'CHEM120'], ['duration', 'PHYS110'], ['coincidence', 'BIO130', 'MATH101']]),
  ('normal control 8',
   [{'MATH101H': 1, 'PHYS110': 1, 'MATH101': 3}, {'MATH101': 180, 'MATH101H': 180, 'PHYS110': 120},
    [90, 120, 120, 120],
    [['after', 'PHYS110', 'MATH101H'], ['exclusion', 'MATH101H', 'PHYS110'],
     ['exclusive', 'MATH101H', 'MATH101']]],
   [['duration', 'MATH101'], ['duration', 'MATH101H'], ['after', 'PHYS110', 'MATH101H'],
    ['exclusion', 'MATH101H', 'PHYS110'], ['exclusive', 'MATH101H', 'MATH101']])],
 [('regression: exclusive counts self 1',
   [{'MATH101H': 0, 'PHYS110': 0, 'CHEM120': 1, 'BIO130': 1, 'MATH101': 3},
    {'MATH101': 120, 'MATH101H': 180, 'PHYS110': 90, 'CHEM120': 120, 'BIO130': 90}, [180, 120, 120, 90],
    [['exclusive', 'MATH101', 'PHYS110']]],
   [['duration', 'MATH101']]),
  ('regression variant: exclusive counts self 2',
   [{'MATH101H': 3, 'PHYS110': 3, 'MATH101': 0}, {'MATH101': 120, 'MATH101H': 180, 'PHYS110': 180},
    [120, 180, 180, 120], [['exclusive', 'MATH101', 'MATH101H']]],
   [['duration', 'MATH101H'], ['duration', 'PHYS110']]),
  ('partial repair guard 3',
   [{'CHEM120': 2, 'MATH101H': 3, 'PHYS110': 3, 'MATH101': 1},
    {'MATH101': 180, 'MATH101H': 120, 'PHYS110': 90, 'CHEM120': 180}, [120, 90, 120, 120],
    [['exclusive', 'PHYS110', 'MATH101'], ['exclusive', 'PHYS110', 'CHEM120']]],
   [['duration', 'CHEM120'], ['duration', 'MATH101'], ['exclusive', 'PHYS110', 'MATH101'],
    ['exclusive', 'PHYS110', 'CHEM120']]),
  ('boundary control 4', [{'A': 2, 'B': 1}, {'A': 90, 'B': 90}, [90, 120, 120], [['after', 'A', 'B']]], []),
  ('normal control 5',
   [{'MATH101': 0, 'PHYS110': 2, 'BIO130': 2, 'MATH101H': 3, 'CHEM120': 2},
    {'MATH101': 180, 'MATH101H': 90, 'PHYS110': 120, 'CHEM120': 180, 'BIO130': 180}, [180, 90, 180, 90],
    [['after', 'CHEM120', 'MATH101'], ['coincidence', 'MATH101', 'CHEM120'],
     ['exclusive', 'BIO130', 'MATH101']]],
   [['coincidence', 'MATH101', 'CHEM120'], ['exclusive', 'BIO130', 'MATH101']]),
  ('normal control 6',
   [{'MATH101': 0, 'MATH101H': 3, 'PHYS110': 0}, {'MATH101': 120, 'MATH101H': 90, 'PHYS110': 120},
    [180, 90, 120, 180],
    [['after', 'MATH101H', 'PHYS110'], ['coincidence', 'MATH101', 'MATH101H'],
     ['exclusion', 'PHYS110', 'MATH101']]],
   [['coincidence', 'MATH101', 'MATH101H'], ['exclusion', 'PHYS110', 'MATH101']]),
  ('normal control 7',
   [{'MATH101': 3, 'MATH101H': 3, 'CHEM120': 1, 'HIST140': 2, 'PHYS110': 1, 'BIO130': 0},
    {'MATH101': 180, 'MATH101H': 120, 'PHYS110': 120, 'CHEM120': 180, 'BIO130': 90, 'HIST140': 180},
    [120, 90, 180, 180], [['after', 'MATH101H', 'PHYS110'], ['coincidence', 'BIO130', 'MATH101']]],
   [['duration', 'CHEM120'], ['duration', 'PHYS110'], ['coincidence', 'BIO130', 'MATH101']]),
  ('normal control 8',
   [{'CHEM120': 0, 'MATH101H': 1, 'MATH101': 2, 'HIST140': 3, 'BIO130': 3, 'PHYS110': 1},
    {'MATH101': 90, 'MATH101H': 120, 'PHYS110': 180, 'CHEM120': 90, 'BIO130': 90, 'HIST140': 180},
    [180, 90, 120, 90], [['exclusive', 'HIST140', 'BIO130']]],
   [['duration', 'HIST140'], ['duration', 'MATH101H'], ['duration', 'PHYS110'],
    ['exclusive', 'HIST140', 'BIO130']])],
 [('regression: exclusive counts self 1',
   [{'MATH101H': 3, 'MATH101': 2, 'PHYS110': 3}, {'MATH101': 120, 'MATH101H': 120, 'PHYS110': 90},
    [90, 180, 90, 90],
    [['exclusive', 'MATH101', 'PHYS110'], ['coincidence', 'PHYS110', 'MATH101'],
     ['after', 'MATH101H', 'PHYS110']]],
   [['duration', 'MATH101'], ['duration', 'MATH101H'], ['coincidence', 'PHYS110', 'MATH101'],
    ['after', 'MATH101H', 'PHYS110']]),
  ('regression variant: exclusive counts self 2',
   [{'PHYS110': 3, 'MATH101H': 0, 'CHEM120': 3, 'MATH101': 2},
    {'MATH101': 120, 'MATH101H': 120, 'PHYS110': 180, 'CHEM120': 90}, [120, 180, 120, 180],
    [['coincidence', 'MATH101H', 'PHYS110'], ['exclusive', 'MATH101H', 'MATH101'],
     ['exclusive', 'PHYS110', 'CHEM120']]],
   [['coincidence', 'MATH101H', 'PHYS110'], ['exclusive', 'PHYS110', 'CHEM120']]),
  ('partial repair guard 3',
   [{'PHYS110': 0, 'CHEM120': 3, 'MATH101H': 2, 'MATH101': 0},
    {'MATH101': 120, 'MATH101H': 120, 'PHYS110': 120, 'CHEM120': 120}, [90, 180, 90, 120],
    [['after', 'CHEM120', 'MATH101'], ['exclusive', 'MATH101', 'CHEM120']]],
   [['duration', 'MATH101'], ['duration', 'MATH101H'], ['duration', 'PHYS110'],
    ['exclusive', 'MATH101', 'CHEM120']]),
  ('boundary control 4', [{'B': 0, 'A': 1}, {'A': 180, 'B': 180}, [120, 120], []],
   [['duration', 'A'], ['duration', 'B']]),
  ('normal control 5',
   [{'PHYS110': 2, 'MATH101': 3, 'MATH101H': 3}, {'MATH101': 120, 'MATH101H': 120, 'PHYS110': 180},
    [90, 90, 180, 120], [['coincidence', 'MATH101', 'MATH101H']]],
   []),
  ('normal control 6',
   [{'CHEM120': 0, 'MATH101H': 0, 'PHYS110': 1, 'MATH101': 1},
    {'MATH101': 120, 'MATH101H': 120, 'PHYS110': 90, 'CHEM120': 120}, [120, 180, 180, 90],
    [['exclusion', 'CHEM120', 'MATH101H']]],
   [['exclusion', 'CHEM120', 'MATH101H']]),
  ('normal control 7',
   [{'CHEM120': 2, 'MATH101': 1, 'PHYS110': 3, 'BIO130': 0, 'MATH101H': 3},
    {'MATH101': 180, 'MATH101H': 90, 'PHYS110': 90, 'CHEM120': 120, 'BIO130': 90}, [90, 120, 120, 90],
    [['exclusive', 'MATH101H', 'BIO130'], ['after', 'MATH101', 'BIO130'], ['after', 'MATH101H', 'CHEM120'],
     ['exclusive', 'MATH101H', 'CHEM120']]],
   [['duration', 'MATH101'], ['exclusive', 'MATH101H', 'BIO130'], ['exclusive', 'MATH101H', 'CHEM120']]),
  ('normal control 8',
   [{'CHEM120': 3, 'BIO130': 0, 'MATH101': 0, 'MATH101H': 3, 'PHYS110': 2},
    {'MATH101': 180, 'MATH101H': 90, 'PHYS110': 120, 'CHEM120': 90, 'BIO130': 180}, [90, 120, 180, 90],
    [['after', 'PHYS110', 'CHEM120']]],
   [['duration', 'BIO130'], ['duration', 'MATH101'], ['after', 'PHYS110', 'CHEM120']])],
 [('regression: exclusive counts self 1',
   [{'MATH101': 2, 'MATH101H': 3, 'PHYS110': 1, 'CHEM120': 1},
    {'MATH101': 120, 'MATH101H': 120, 'PHYS110': 180, 'CHEM120': 90}, [120, 180, 90, 120],
    [['coincidence', 'MATH101H', 'PHYS110'], ['exclusive', 'MATH101H', 'MATH101'],
     ['coincidence', 'MATH101H', 'CHEM120']]],
   [['duration', 'MATH101'], ['coincidence', 'MATH101H', 'PHYS110'], ['coincidence', 'MATH101H', 'CHEM120']]),
  ('regression variant: exclusive counts self 2',
   [{'MATH101': 2, 'MATH101H': 1, 'CHEM120': 0, 'PHYS110': 3},
    {'MATH101': 180, 'MATH101H': 120, 'PHYS110': 180, 'CHEM120': 180}, [120, 180, 90, 180],
    [['exclusive', 'MATH101', 'CHEM120'], ['after', 'PHYS110', 'MATH101H'],
     ['exclusive', 'MATH101H', 'PHYS110'], ['exclusive', 'CHEM120', 'MATH101']]],
   [['duration', 'CHEM120'], ['duration', 'MATH101']]),
  ('partial repair guard 3',
   [{'MATH101': 0, 'MATH101H': 3, 'PHYS110': 0}, {'MATH101': 180, 'MATH101H': 90, 'PHYS110': 90},
    [180, 90, 180, 180], [['exclusive', 'PHYS110', 'MATH101'], ['exclusion', 'MATH101H', 'PHYS110']]],
   [['exclusive', 'PHYS110', 'MATH101']]),
  ('boundary control 4', [{'A': 0}, {'A': 120}, [120], []], []),
  ('normal control 5',
   [{'PHYS110': 1, 'MATH101H': 3, 'MATH101': 2, 'CHEM120': 2, 'BIO130': 2},
    {'MATH101': 180, 'MATH101H': 180, 'PHYS110': 180, 'CHEM120': 180, 'BIO130': 90}, [90, 90, 90, 180],
    [['exclusive', 'BIO130', 'CHEM120'], ['exclusive', 'BIO130', 'MATH101'], ['after', 'MATH101H', 'PHYS110'],
     ['coincidence', 'PHYS110', 'CHEM120']]],
   [['duration', 'CHEM120'], ['duration', 'MATH101'], ['duration', 'PHYS110'],
    ['exclusive', 'BIO130', 'CHEM120'], ['exclusive', 'BIO130', 'MATH101'],
    ['coincidence', 'PHYS110', 'CHEM120']]),
  ('normal control 6',
   [{'BIO130': 1, 'MATH101H': 2, 'CHEM120': 2, 'PHYS110': 0, 'MATH101': 3},
    {'MATH101': 180, 'MATH101H': 180, 'PHYS110': 90, 'CHEM120': 180, 'BIO130': 120}, [180, 120, 180, 90],
    [['exclusive', 'CHEM120', 'BIO130']]],
   [['duration', 'MATH101'], ['exclusive', 'CHEM120', 'BIO130']]),
  ('normal control 7',
   [{'CHEM120': 3, 'MATH101H': 3, 'MATH101': 2, 'PHYS110': 0, 'BIO130': 0},
    {'MATH101': 180, 'MATH101H': 90, 'PHYS110': 90, 'CHEM120': 180, 'BIO130': 120}, [180, 120, 90, 120],
    [['exclusion', 'BIO130', 'CHEM120'], ['after', 'CHEM120', 'PHYS110'],
     ['exclusive', 'MATH101H', 'CHEM120']]],
   [['duration', 'CHEM120'], ['duration', 'MATH101'], ['exclusive', 'MATH101H', 'CHEM120']]),
  ('normal control 8',
   [{'MATH101H': 0, 'BIO130': 2, 'CHEM120': 3, 'MATH101': 2, 'PHYS110': 2, 'HIST140': 3},
    {'MATH101': 180, 'MATH101H': 180, 'PHYS110': 90, 'CHEM120': 180, 'BIO130': 90, 'HIST140': 180},
    [90, 120, 90, 180], [['after', 'BIO130', 'CHEM120'], ['exclusion', 'BIO130', 'MATH101']]],
   [['duration', 'MATH101'], ['duration', 'MATH101H'], ['after', 'BIO130', 'CHEM120'],
    ['exclusion', 'BIO130', 'MATH101']])],
 [('regression: exclusive counts self 1',
   [{'MATH101H': 2, 'MATH101': 0, 'PHYS110': 3}, {'MATH101': 180, 'MATH101H': 90, 'PHYS110': 90},
    [90, 120, 120, 180],
    [['after', 'PHYS110', 'MATH101H'], ['exclusive', 'MATH101', 'PHYS110'],
     ['exclusion', 'MATH101H', 'MATH101']]],
   [['duration', 'MATH101']]),
  ('regression variant: exclusive counts self 2',
   [{'MATH101H': 2, 'PHYS110': 0, 'MATH101': 1}, {'MATH101': 180, 'MATH101H': 90, 'PHYS110': 180},
    [120, 90, 180, 180], [['exclusive', 'MATH101H', 'PHYS110'], ['exclusive', 'MATH101', 'PHYS110']]],
   [['duration', 'MATH101'], ['duration', 'PHYS110']]),
  ('partial repair guard 3',
   [{'MATH101H': 1, 'PHYS110': 1, 'MATH101': 2}, {'MATH101': 90, 'MATH101H': 90, 'PHYS110': 120},
    [180, 120, 120, 120],
    [['coincidence', 'PHYS110', 'MATH101'], ['exclusive', 'PHYS110', 'MATH101H'],
     ['after', 'PHYS110', 'MATH101'], ['coincidence', 'MATH101', 'MATH101H']]],
   [['coincidence', 'PHYS110', 'MATH101'], ['exclusive', 'PHYS110', 'MATH101H'],
    ['after', 'PHYS110', 'MATH101'], ['coincidence', 'MATH101', 'MATH101H']]),
  ('boundary control 4', [{'A': 1, 'B': 1}, {'A': 90, 'B': 90}, [90, 120], [['after', 'A', 'B']]],
   [['after', 'A', 'B']]),
  ('normal control 5',
   [{'HIST140': 0, 'BIO130': 1, 'MATH101H': 0, 'CHEM120': 3, 'PHYS110': 0, 'MATH101': 2},
    {'MATH101': 90, 'MATH101H': 180, 'PHYS110': 180, 'CHEM120': 120, 'BIO130': 120, 'HIST140': 120},
    [120, 180, 120, 90], [['coincidence', 'HIST140', 'MATH101H'], ['exclusive', 'BIO130', 'MATH101']]],
   [['duration', 'CHEM120'], ['duration', 'MATH101H'], ['duration', 'PHYS110']]),
  ('normal control 6',
   [{'BIO130': 0, 'MATH101': 2, 'CHEM120': 0, 'PHYS110': 3, 'MATH101H': 1, 'HIST140': 2},
    {'MATH101': 120, 'MATH101H': 120, 'PHYS110': 180, 'CHEM120': 90, 'BIO130': 180, 'HIST140': 120},
    [120, 180, 180, 180],
    [['exclusion', 'PHYS110', 'BIO130'], ['exclusion', 'CHEM120', 'BIO130'], ['after', 'BIO130', 'MATH101'],
     ['after', 'BIO130', 'MATH101H']]],
   [['duration', 'BIO130'], ['exclusion', 'CHEM120', 'BIO130'], ['after', 'BIO130', 'MATH101'],
    ['after', 'BIO130', 'MATH101H']]),
  ('normal control 7',
   [{'CHEM120': 2, 'MATH101H': 2, 'PHYS110': 3, 'MATH101': 3},
    {'MATH101': 90, 'MATH101H': 180, 'PHYS110': 180, 'CHEM120': 180}, [180, 90, 180, 180],
    [['exclusive', 'MATH101H', 'PHYS110'], ['coincidence', 'CHEM120', 'PHYS110']]],
   [['exclusive', 'MATH101H', 'PHYS110'], ['coincidence', 'CHEM120', 'PHYS110']]),
  ('normal control 8',
   [{'PHYS110': 0, 'MATH101H': 3, 'MATH101': 3}, {'MATH101': 180, 'MATH101H': 180, 'PHYS110': 90},
    [90, 180, 90, 180],
    [['exclusive', 'PHYS110', 'MATH101'], ['after', 'PHYS110', 'MATH101'],
     ['exclusion', 'MATH101', 'PHYS110']]],
   [['after', 'PHYS110', 'MATH101']])]]
for label, args, expected in fixtures[N-1]:
    check(label, solve(*args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
regression: exclusive counts self 1[['exclusive', 'A', 'B']][]Failed
regression variant: exclusive counts self 2[['exclusive', 'PHYS110', 'MATH101'], ['coincidence', 'PHYS110', 'MATH101H']][['coincidence', 'PHYS110', 'MATH101H']]Failed
partial repair guard 3[['exclusive', 'MATH101H', 'PHYS110'], ['coincidence', 'CHEM120', 'PHYS110']][['exclusive', 'MATH101H', 'PHYS110'], ['coincidence', 'CHEM120', 'PHYS110']]Passed
normal control 4[['duration', 'MATH101'], ['duration', 'PHYS110'], ['exclusive', 'CHEM120', 'MATH101'], ['coincidence', 'MATH101H', 'MATH101']][['duration', 'MATH101'], ['duration', 'PHYS110'], ['exclusive', 'CHEM120', 'MATH101'], ['coincidence', 'MATH101H', 'MATH101']]Passed
normal control 5[['duration', 'MATH101H'], ['coincidence', 'MATH101', 'PHYS110']][['duration', 'MATH101H'], ['coincidence', 'MATH101', 'PHYS110']]Passed
normal control 6[['duration', 'BIO130'], ['duration', 'CHEM120'], ['duration', 'MATH101'], ['coincidence', 'MATH101', 'CHEM120'], ['exclusive', 'CHEM120', 'MATH101'], ['coincidence', 'MATH101H', 'MATH101']][['duration', 'BIO130'], ['duration', 'CHEM120'], ['duration', 'MATH101'], ['coincidence', 'MATH101', 'CHEM120'], ['coincidence', 'MATH101H', 'MATH101']]Failed
normal control 7[['duration', 'CHEM120'], ['duration', 'PHYS110'], ['coincidence', 'BIO130', 'MATH101']][['duration', 'CHEM120'], ['duration', 'PHYS110'], ['coincidence', 'BIO130', 'MATH101']]Passed
normal control 8[['duration', 'MATH101'], ['duration', 'MATH101H'], ['after', 'PHYS110', 'MATH101H'], ['exclusion', 'MATH101H', 'PHYS110'], ['exclusive', 'MATH101H', 'MATH101']][['duration', 'MATH101'], ['duration', 'MATH101H'], ['after', 'PHYS110', 'MATH101H'], ['exclusion', 'MATH101H', 'PHYS110'], ['exclusive', 'MATH101H', 'MATH101']]Passed

SHA-256 / cc3fb65d835377edbb8c1e57df93bf3fd8401c689d741dc6f8d5f2f0d5c1b9a9

2 / The unsuccessful fix

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(timetable, exams, periods, cons):
    out = []
    for e in sorted(timetable):
        if exams[e] > periods[timetable[e]]:
            out.append(['duration', e])
    for kind, a, b in cons:
        pa, pb = timetable[a], timetable[b]
        if kind == 'after' and not pa > pb:
            out.append([kind, a, b])
        elif kind == 'exclusion' and pa == pb:
            out.append([kind, a, b])
        elif kind == 'coincidence' and pa != pb:
            out.append([kind, a, b])
        elif kind == 'exclusive' and sum(1 for e in timetable if timetable[e] == pa) > 2:
            out.append([kind, a, b])
    return out
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('regression: exclusive counts self 1',
   [{'A': 1, 'B': 0}, {'A': 120, 'B': 90}, [90, 120], [['exclusive', 'A', 'B']]], []),
  ('regression variant: exclusive counts self 2',
   [{'MATH101': 3, 'PHYS110': 0, 'MATH101H': 2}, {'MATH101': 120, 'MATH101H': 180, 'PHYS110': 180},
    [180, 90, 180, 180], [['exclusive', 'PHYS110', 'MATH101'], ['coincidence', 'PHYS110', 'MATH101H']]],
   [['coincidence', 'PHYS110', 'MATH101H']]),
  ('partial repair guard 3',
   [{'CHEM120': 2, 'MATH101H': 2, 'PHYS110': 3, 'MATH101': 3},
    {'MATH101': 90, 'MATH101H': 180, 'PHYS110': 180, 'CHEM120': 180}, [180, 90, 180, 180],
    [['exclusive', 'MATH101H', 'PHYS110'], ['coincidence', 'CHEM120', 'PHYS110']]],
   [['exclusive', 'MATH101H', 'PHYS110'], ['coincidence', 'CHEM120', 'PHYS110']]),
  ('normal control 4',
   [{'PHYS110': 2, 'MATH101': 2, 'MATH101H': 1, 'CHEM120': 2},
    {'MATH101': 180, 'MATH101H': 120, 'PHYS110': 180, 'CHEM120': 90}, [180, 120, 90, 90],
    [['exclusive', 'CHEM120', 'MATH101'], ['coincidence', 'MATH101H', 'MATH101'],
     ['exclusion', 'MATH101H', 'MATH101']]],
   [['duration', 'MATH101'], ['duration', 'PHYS110'], ['exclusive', 'CHEM120', 'MATH101'],
    ['coincidence', 'MATH101H', 'MATH101']]),
  ('normal control 5',
   [{'PHYS110': 3, 'MATH101': 0, 'MATH101H': 3}, {'MATH101': 120, 'MATH101H': 120, 'PHYS110': 90},
    [180, 90, 180, 90], [['coincidence', 'MATH101', 'PHYS110'], ['after', 'PHYS110', 'MATH101']]],
   [['duration', 'MATH101H'], ['coincidence', 'MATH101', 'PHYS110']]),
  ('normal control 6',
   [{'CHEM120': 0, 'MATH101': 3, 'MATH101H': 1, 'PHYS110': 1, 'BIO130': 2},
    {'MATH101': 180, 'MATH101H': 180, 'PHYS110': 90, 'CHEM120': 180, 'BIO130': 120}, [90, 180, 90, 90],
    [['coincidence', 'MATH101', 'CHEM120'], ['exclusive', 'CHEM120', 'MATH101'],
     ['coincidence', 'MATH101H', 'MATH101'], ['after', 'PHYS110', 'CHEM120']]],
   [['duration', 'BIO130'], ['duration', 'CHEM120'], ['duration', 'MATH101'],
    ['coincidence', 'MATH101', 'CHEM120'], ['coincidence', 'MATH101H', 'MATH101']]),
  ('normal control 7',
   [{'MATH101': 3, 'MATH101H': 3, 'CHEM120': 1, 'HIST140': 2, 'PHYS110': 1, 'BIO130': 0},
    {'MATH101': 180, 'MATH101H': 120, 'PHYS110': 120, 'CHEM120': 180, 'BIO130': 90, 'HIST140': 180},
    [120, 90, 180, 180], [['after', 'MATH101H', 'PHYS110'], ['coincidence', 'BIO130', 'MATH101']]],
   [['duration', 'CHEM120'], ['duration', 'PHYS110'], ['coincidence', 'BIO130', 'MATH101']]),
  ('normal control 8',
   [{'MATH101H': 1, 'PHYS110': 1, 'MATH101': 3}, {'MATH101': 180, 'MATH101H': 180, 'PHYS110': 120},
    [90, 120, 120, 120],
    [['after', 'PHYS110', 'MATH101H'], ['exclusion', 'MATH101H', 'PHYS110'],
     ['exclusive', 'MATH101H', 'MATH101']]],
   [['duration', 'MATH101'], ['duration', 'MATH101H'], ['after', 'PHYS110', 'MATH101H'],
    ['exclusion', 'MATH101H', 'PHYS110'], ['exclusive', 'MATH101H', 'MATH101']])],
 [('regression: exclusive counts self 1',
   [{'MATH101H': 0, 'PHYS110': 0, 'CHEM120': 1, 'BIO130': 1, 'MATH101': 3},
    {'MATH101': 120, 'MATH101H': 180, 'PHYS110': 90, 'CHEM120': 120, 'BIO130': 90}, [180, 120, 120, 90],
    [['exclusive', 'MATH101', 'PHYS110']]],
   [['duration', 'MATH101']]),
  ('regression variant: exclusive counts self 2',
   [{'MATH101H': 3, 'PHYS110': 3, 'MATH101': 0}, {'MATH101': 120, 'MATH101H': 180, 'PHYS110': 180},
    [120, 180, 180, 120], [['exclusive', 'MATH101', 'MATH101H']]],
   [['duration', 'MATH101H'], ['duration', 'PHYS110']]),
  ('partial repair guard 3',
   [{'CHEM120': 2, 'MATH101H': 3, 'PHYS110': 3, 'MATH101': 1},
    {'MATH101': 180, 'MATH101H': 120, 'PHYS110': 90, 'CHEM120': 180}, [120, 90, 120, 120],
    [['exclusive', 'PHYS110', 'MATH101'], ['exclusive', 'PHYS110', 'CHEM120']]],
   [['duration', 'CHEM120'], ['duration', 'MATH101'], ['exclusive', 'PHYS110', 'MATH101'],
    ['exclusive', 'PHYS110', 'CHEM120']]),
  ('boundary control 4', [{'A': 2, 'B': 1}, {'A': 90, 'B': 90}, [90, 120, 120], [['after', 'A', 'B']]], []),
  ('normal control 5',
   [{'MATH101': 0, 'PHYS110': 2, 'BIO130': 2, 'MATH101H': 3, 'CHEM120': 2},
    {'MATH101': 180, 'MATH101H': 90, 'PHYS110': 120, 'CHEM120': 180, 'BIO130': 180}, [180, 90, 180, 90],
    [['after', 'CHEM120', 'MATH101'], ['coincidence', 'MATH101', 'CHEM120'],
     ['exclusive', 'BIO130', 'MATH101']]],
   [['coincidence', 'MATH101', 'CHEM120'], ['exclusive', 'BIO130', 'MATH101']]),
  ('normal control 6',
   [{'MATH101': 0, 'MATH101H': 3, 'PHYS110': 0}, {'MATH101': 120, 'MATH101H': 90, 'PHYS110': 120},
    [180, 90, 120, 180],
    [['after', 'MATH101H', 'PHYS110'], ['coincidence', 'MATH101', 'MATH101H'],
     ['exclusion', 'PHYS110', 'MATH101']]],
   [['coincidence', 'MATH101', 'MATH101H'], ['exclusion', 'PHYS110', 'MATH101']]),
  ('normal control 7',
   [{'MATH101': 3, 'MATH101H': 3, 'CHEM120': 1, 'HIST140': 2, 'PHYS110': 1, 'BIO130': 0},
    {'MATH101': 180, 'MATH101H': 120, 'PHYS110': 120, 'CHEM120': 180, 'BIO130': 90, 'HIST140': 180},
    [120, 90, 180, 180], [['after', 'MATH101H', 'PHYS110'], ['coincidence', 'BIO130', 'MATH101']]],
   [['duration', 'CHEM120'], ['duration', 'PHYS110'], ['coincidence', 'BIO130', 'MATH101']]),
  ('normal control 8',
   [{'CHEM120': 0, 'MATH101H': 1, 'MATH101': 2, 'HIST140': 3, 'BIO130': 3, 'PHYS110': 1},
    {'MATH101': 90, 'MATH101H': 120, 'PHYS110': 180, 'CHEM120': 90, 'BIO130': 90, 'HIST140': 180},
    [180, 90, 120, 90], [['exclusive', 'HIST140', 'BIO130']]],
   [['duration', 'HIST140'], ['duration', 'MATH101H'], ['duration', 'PHYS110'],
    ['exclusive', 'HIST140', 'BIO130']])],
 [('regression: exclusive counts self 1',
   [{'MATH101H': 3, 'MATH101': 2, 'PHYS110': 3}, {'MATH101': 120, 'MATH101H': 120, 'PHYS110': 90},
    [90, 180, 90, 90],
    [['exclusive', 'MATH101', 'PHYS110'], ['coincidence', 'PHYS110', 'MATH101'],
     ['after', 'MATH101H', 'PHYS110']]],
   [['duration', 'MATH101'], ['duration', 'MATH101H'], ['coincidence', 'PHYS110', 'MATH101'],
    ['after', 'MATH101H', 'PHYS110']]),
  ('regression variant: exclusive counts self 2',
   [{'PHYS110': 3, 'MATH101H': 0, 'CHEM120': 3, 'MATH101': 2},
    {'MATH101': 120, 'MATH101H': 120, 'PHYS110': 180, 'CHEM120': 90}, [120, 180, 120, 180],
    [['coincidence', 'MATH101H', 'PHYS110'], ['exclusive', 'MATH101H', 'MATH101'],
     ['exclusive', 'PHYS110', 'CHEM120']]],
   [['coincidence', 'MATH101H', 'PHYS110'], ['exclusive', 'PHYS110', 'CHEM120']]),
  ('partial repair guard 3',
   [{'PHYS110': 0, 'CHEM120': 3, 'MATH101H': 2, 'MATH101': 0},
    {'MATH101': 120, 'MATH101H': 120, 'PHYS110': 120, 'CHEM120': 120}, [90, 180, 90, 120],
    [['after', 'CHEM120', 'MATH101'], ['exclusive', 'MATH101', 'CHEM120']]],
   [['duration', 'MATH101'], ['duration', 'MATH101H'], ['duration', 'PHYS110'],
    ['exclusive', 'MATH101', 'CHEM120']]),
  ('boundary control 4', [{'B': 0, 'A': 1}, {'A': 180, 'B': 180}, [120, 120], []],
   [['duration', 'A'], ['duration', 'B']]),
  ('normal control 5',
   [{'PHYS110': 2, 'MATH101': 3, 'MATH101H': 3}, {'MATH101': 120, 'MATH101H': 120, 'PHYS110': 180},
    [90, 90, 180, 120], [['coincidence', 'MATH101', 'MATH101H']]],
   []),
  ('normal control 6',
   [{'CHEM120': 0, 'MATH101H': 0, 'PHYS110': 1, 'MATH101': 1},
    {'MATH101': 120, 'MATH101H': 120, 'PHYS110': 90, 'CHEM120': 120}, [120, 180, 180, 90],
    [['exclusion', 'CHEM120', 'MATH101H']]],
   [['exclusion', 'CHEM120', 'MATH101H']]),
  ('normal control 7',
   [{'CHEM120': 2, 'MATH101': 1, 'PHYS110': 3, 'BIO130': 0, 'MATH101H': 3},
    {'MATH101': 180, 'MATH101H': 90, 'PHYS110': 90, 'CHEM120': 120, 'BIO130': 90}, [90, 120, 120, 90],
    [['exclusive', 'MATH101H', 'BIO130'], ['after', 'MATH101', 'BIO130'], ['after', 'MATH101H', 'CHEM120'],
     ['exclusive', 'MATH101H', 'CHEM120']]],
   [['duration', 'MATH101'], ['exclusive', 'MATH101H', 'BIO130'], ['exclusive', 'MATH101H', 'CHEM120']]),
  ('normal control 8',
   [{'CHEM120': 3, 'BIO130': 0, 'MATH101': 0, 'MATH101H': 3, 'PHYS110': 2},
    {'MATH101': 180, 'MATH101H': 90, 'PHYS110': 120, 'CHEM120': 90, 'BIO130': 180}, [90, 120, 180, 90],
    [['after', 'PHYS110', 'CHEM120']]],
   [['duration', 'BIO130'], ['duration', 'MATH101'], ['after', 'PHYS110', 'CHEM120']])],
 [('regression: exclusive counts self 1',
   [{'MATH101': 2, 'MATH101H': 3, 'PHYS110': 1, 'CHEM120': 1},
    {'MATH101': 120, 'MATH101H': 120, 'PHYS110': 180, 'CHEM120': 90}, [120, 180, 90, 120],
    [['coincidence', 'MATH101H', 'PHYS110'], ['exclusive', 'MATH101H', 'MATH101'],
     ['coincidence', 'MATH101H', 'CHEM120']]],
   [['duration', 'MATH101'], ['coincidence', 'MATH101H', 'PHYS110'], ['coincidence', 'MATH101H', 'CHEM120']]),
  ('regression variant: exclusive counts self 2',
   [{'MATH101': 2, 'MATH101H': 1, 'CHEM120': 0, 'PHYS110': 3},
    {'MATH101': 180, 'MATH101H': 120, 'PHYS110': 180, 'CHEM120': 180}, [120, 180, 90, 180],
    [['exclusive', 'MATH101', 'CHEM120'], ['after', 'PHYS110', 'MATH101H'],
     ['exclusive', 'MATH101H', 'PHYS110'], ['exclusive', 'CHEM120', 'MATH101']]],
   [['duration', 'CHEM120'], ['duration', 'MATH101']]),
  ('partial repair guard 3',
   [{'MATH101': 0, 'MATH101H': 3, 'PHYS110': 0}, {'MATH101': 180, 'MATH101H': 90, 'PHYS110': 90},
    [180, 90, 180, 180], [['exclusive', 'PHYS110', 'MATH101'], ['exclusion', 'MATH101H', 'PHYS110']]],
   [['exclusive', 'PHYS110', 'MATH101']]),
  ('boundary control 4', [{'A': 0}, {'A': 120}, [120], []], []),
  ('normal control 5',
   [{'PHYS110': 1, 'MATH101H': 3, 'MATH101': 2, 'CHEM120': 2, 'BIO130': 2},
    {'MATH101': 180, 'MATH101H': 180, 'PHYS110': 180, 'CHEM120': 180, 'BIO130': 90}, [90, 90, 90, 180],
    [['exclusive', 'BIO130', 'CHEM120'], ['exclusive', 'BIO130', 'MATH101'], ['after', 'MATH101H', 'PHYS110'],
     ['coincidence', 'PHYS110', 'CHEM120']]],
   [['duration', 'CHEM120'], ['duration', 'MATH101'], ['duration', 'PHYS110'],
    ['exclusive', 'BIO130', 'CHEM120'], ['exclusive', 'BIO130', 'MATH101'],
    ['coincidence', 'PHYS110', 'CHEM120']]),
  ('normal control 6',
   [{'BIO130': 1, 'MATH101H': 2, 'CHEM120': 2, 'PHYS110': 0, 'MATH101': 3},
    {'MATH101': 180, 'MATH101H': 180, 'PHYS110': 90, 'CHEM120': 180, 'BIO130': 120}, [180, 120, 180, 90],
    [['exclusive', 'CHEM120', 'BIO130']]],
   [['duration', 'MATH101'], ['exclusive', 'CHEM120', 'BIO130']]),
  ('normal control 7',
   [{'CHEM120': 3, 'MATH101H': 3, 'MATH101': 2, 'PHYS110': 0, 'BIO130': 0},
    {'MATH101': 180, 'MATH101H': 90, 'PHYS110': 90, 'CHEM120': 180, 'BIO130': 120}, [180, 120, 90, 120],
    [['exclusion', 'BIO130', 'CHEM120'], ['after', 'CHEM120', 'PHYS110'],
     ['exclusive', 'MATH101H', 'CHEM120']]],
   [['duration', 'CHEM120'], ['duration', 'MATH101'], ['exclusive', 'MATH101H', 'CHEM120']]),
  ('normal control 8',
   [{'MATH101H': 0, 'BIO130': 2, 'CHEM120': 3, 'MATH101': 2, 'PHYS110': 2, 'HIST140': 3},
    {'MATH101': 180, 'MATH101H': 180, 'PHYS110': 90, 'CHEM120': 180, 'BIO130': 90, 'HIST140': 180},
    [90, 120, 90, 180], [['after', 'BIO130', 'CHEM120'], ['exclusion', 'BIO130', 'MATH101']]],
   [['duration', 'MATH101'], ['duration', 'MATH101H'], ['after', 'BIO130', 'CHEM120'],
    ['exclusion', 'BIO130', 'MATH101']])],
 [('regression: exclusive counts self 1',
   [{'MATH101H': 2, 'MATH101': 0, 'PHYS110': 3}, {'MATH101': 180, 'MATH101H': 90, 'PHYS110': 90},
    [90, 120, 120, 180],
    [['after', 'PHYS110', 'MATH101H'], ['exclusive', 'MATH101', 'PHYS110'],
     ['exclusion', 'MATH101H', 'MATH101']]],
   [['duration', 'MATH101']]),
  ('regression variant: exclusive counts self 2',
   [{'MATH101H': 2, 'PHYS110': 0, 'MATH101': 1}, {'MATH101': 180, 'MATH101H': 90, 'PHYS110': 180},
    [120, 90, 180, 180], [['exclusive', 'MATH101H', 'PHYS110'], ['exclusive', 'MATH101', 'PHYS110']]],
   [['duration', 'MATH101'], ['duration', 'PHYS110']]),
  ('partial repair guard 3',
   [{'MATH101H': 1, 'PHYS110': 1, 'MATH101': 2}, {'MATH101': 90, 'MATH101H': 90, 'PHYS110': 120},
    [180, 120, 120, 120],
    [['coincidence', 'PHYS110', 'MATH101'], ['exclusive', 'PHYS110', 'MATH101H'],
     ['after', 'PHYS110', 'MATH101'], ['coincidence', 'MATH101', 'MATH101H']]],
   [['coincidence', 'PHYS110', 'MATH101'], ['exclusive', 'PHYS110', 'MATH101H'],
    ['after', 'PHYS110', 'MATH101'], ['coincidence', 'MATH101', 'MATH101H']]),
  ('boundary control 4', [{'A': 1, 'B': 1}, {'A': 90, 'B': 90}, [90, 120], [['after', 'A', 'B']]],
   [['after', 'A', 'B']]),
  ('normal control 5',
   [{'HIST140': 0, 'BIO130': 1, 'MATH101H': 0, 'CHEM120': 3, 'PHYS110': 0, 'MATH101': 2},
    {'MATH101': 90, 'MATH101H': 180, 'PHYS110': 180, 'CHEM120': 120, 'BIO130': 120, 'HIST140': 120},
    [120, 180, 120, 90], [['coincidence', 'HIST140', 'MATH101H'], ['exclusive', 'BIO130', 'MATH101']]],
   [['duration', 'CHEM120'], ['duration', 'MATH101H'], ['duration', 'PHYS110']]),
  ('normal control 6',
   [{'BIO130': 0, 'MATH101': 2, 'CHEM120': 0, 'PHYS110': 3, 'MATH101H': 1, 'HIST140': 2},
    {'MATH101': 120, 'MATH101H': 120, 'PHYS110': 180, 'CHEM120': 90, 'BIO130': 180, 'HIST140': 120},
    [120, 180, 180, 180],
    [['exclusion', 'PHYS110', 'BIO130'], ['exclusion', 'CHEM120', 'BIO130'], ['after', 'BIO130', 'MATH101'],
     ['after', 'BIO130', 'MATH101H']]],
   [['duration', 'BIO130'], ['exclusion', 'CHEM120', 'BIO130'], ['after', 'BIO130', 'MATH101'],
    ['after', 'BIO130', 'MATH101H']]),
  ('normal control 7',
   [{'CHEM120': 2, 'MATH101H': 2, 'PHYS110': 3, 'MATH101': 3},
    {'MATH101': 90, 'MATH101H': 180, 'PHYS110': 180, 'CHEM120': 180}, [180, 90, 180, 180],
    [['exclusive', 'MATH101H', 'PHYS110'], ['coincidence', 'CHEM120', 'PHYS110']]],
   [['exclusive', 'MATH101H', 'PHYS110'], ['coincidence', 'CHEM120', 'PHYS110']]),
  ('normal control 8',
   [{'PHYS110': 0, 'MATH101H': 3, 'MATH101': 3}, {'MATH101': 180, 'MATH101H': 180, 'PHYS110': 90},
    [90, 180, 90, 180],
    [['exclusive', 'PHYS110', 'MATH101'], ['after', 'PHYS110', 'MATH101'],
     ['exclusion', 'MATH101', 'PHYS110']]],
   [['after', 'PHYS110', 'MATH101']])]]
for label, args, expected in fixtures[N-1]:
    check(label, solve(*args), expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
regression: exclusive counts self 1[][]Passed
regression variant: exclusive counts self 2[['coincidence', 'PHYS110', 'MATH101H']][['coincidence', 'PHYS110', 'MATH101H']]Passed
partial repair guard 3[['coincidence', 'CHEM120', 'PHYS110']][['exclusive', 'MATH101H', 'PHYS110'], ['coincidence', 'CHEM120', 'PHYS110']]Failed
normal control 4[['duration', 'MATH101'], ['duration', 'PHYS110'], ['exclusive', 'CHEM120', 'MATH101'], ['coincidence', 'MATH101H', 'MATH101']][['duration', 'MATH101'], ['duration', 'PHYS110'], ['exclusive', 'CHEM120', 'MATH101'], ['coincidence', 'MATH101H', 'MATH101']]Passed
normal control 5[['duration', 'MATH101H'], ['coincidence', 'MATH101', 'PHYS110']][['duration', 'MATH101H'], ['coincidence', 'MATH101', 'PHYS110']]Passed
normal control 6[['duration', 'BIO130'], ['duration', 'CHEM120'], ['duration', 'MATH101'], ['coincidence', 'MATH101', 'CHEM120'], ['coincidence', 'MATH101H', 'MATH101']][['duration', 'BIO130'], ['duration', 'CHEM120'], ['duration', 'MATH101'], ['coincidence', 'MATH101', 'CHEM120'], ['coincidence', 'MATH101H', 'MATH101']]Passed
normal control 7[['duration', 'CHEM120'], ['duration', 'PHYS110'], ['coincidence', 'BIO130', 'MATH101']][['duration', 'CHEM120'], ['duration', 'PHYS110'], ['coincidence', 'BIO130', 'MATH101']]Passed
normal control 8[['duration', 'MATH101'], ['duration', 'MATH101H'], ['after', 'PHYS110', 'MATH101H'], ['exclusion', 'MATH101H', 'PHYS110']][['duration', 'MATH101'], ['duration', 'MATH101H'], ['after', 'PHYS110', 'MATH101H'], ['exclusion', 'MATH101H', 'PHYS110'], ['exclusive', 'MATH101H', 'MATH101']]Failed

SHA-256 / f1c6c79535697e3a2f85c04cfb1bd807a88ee6d8b920737b92cea6dc9168b4e3

HELD IN THE MEMBER ARCHIVE

The verified repair and its recorded checks are member-only.

This mechanism has 8 recorded checks per implementation. The open-access tier publishes the failure and the unsuccessful fix; the repaired source that passes every check, and the observations that prove it, are available to members.

Every case sharing this mechanism uses the same contract and the same repair, so this one record is held back for all of them.

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Verification & scope

Stipulated toy exam-timetabling rule set for a bounded model; it does not claim conformance with any institution's regulations or a benchmark specification, and it performs no search or optimisation. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.

Observations recorded using Python 3.12.14 at 2026-09-29T14:52:04.886474+00:00.

Case digest / 3ab6a7daebd0935755bc496c3336fdd471e44c2ecb5507d55ba91f4d5ce92681