FA-67701 / Elevator dispatch scheduling / Open access

Secured floor car call access: secured hours window · case 01

Overnight security windows never apply, or the closing hour is still secured.

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

ROOT CAUSE

The window ignores wrap-around past midnight.

VERIFIED REPAIR

Handle wrapping windows and keep the end hour exclusive.

Unsuccessful approach: Making the end hour inclusive secures an extra hour.

Case contract

Restricted floors are secured during [lo, hi) hours of day (hour = t//3600 mod 24; when lo > hi the window wraps midnight). A car call to a secured floor is accepted only within 10 s of a card read whose card allows that floor; the credential is consumed by the call it authorises. Unsecured calls are accepted without affecting the credential. Log read, accepted or denied.

Why this case matters

Lift group controllers make these decisions many times per minute; a wrong answer strands passengers, wastes trips or overrides a safety rule.

1 / The failure

Exit 1

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

N = 1
observations = []
def solve(x):
    cards = x['cards']
    restricted = set(x['restricted'])
    lo, hi = x['secure_hours']
    card = None
    card_t = None
    out = []
    for t, kind, v in x['events']:
        if kind == 'card':
            card = v
            card_t = t
            out.append('read')
            continue
        hour = (t // 3600) % 24
        in_window = lo <= hour < hi
        if v not in restricted or not in_window:
            out.append('accepted')
        elif card is not None and t - card_t <= 10 and v in cards.get(card, []):
            out.append('accepted')
            card = None
        else:
            out.append('denied')
    return out
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('regression: overnight window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[82800, 'call', 9], [10800, 'call', 9], [43200, 'call', 9]]}, ['denied', 'denied', 'accepted']), ('boundary: end of the secured window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[64800, 'call', 5], [64799, 'call', 5]]}, ['accepted', 'denied']), ('sampled regression 8', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[10, 'call', 5], [3610, 'call', 12], [3670, 'call', 5], [7270, 'card', 'K9'], [7279, 'call', 12], [7339, 'card', 'K2'], [7340, 'card', 'K2']]}, ['denied', 'accepted', 'denied', 'read', 'accepted', 'read', 'read']), ('boundary: call ten seconds after the read', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [110, 'call', 5]]}, ['read', 'accepted']), ('boundary: call eleven seconds after the read', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [111, 'call', 5]]}, ['read', 'denied']), ('control 1', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[9, 'card', 'K1'], [14, 'card', 'K1'], [23, 'call', 2]]}, ['read', 'read', 'accepted']), ('sampled regression 4', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[10, 'call', 7], [3610, 'call', 2], [3615, 'card', 'K9'], [3625, 'call', 2]]}, ['denied', 'accepted', 'read', 'accepted']), ('control 7', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[85810, 'card', 'K1'], [85811, 'call', 7], [85812, 'card', 'K1'], [85821, 'call', 5], [85831, 'card', 'K2']]}, ['read', 'accepted', 'read', 'accepted', 'read'])], [('regression: overnight window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[82800, 'call', 9], [10800, 'call', 9], [43200, 'call', 9]]}, ['denied', 'denied', 'accepted']), ('boundary: end of the secured window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[64800, 'call', 5], [64799, 'call', 5]]}, ['accepted', 'denied']), ('sampled regression 40', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[72011, 'call', 12], [72022, 'call', 9]]}, ['accepted', 'denied']), ('boundary: credential used twice', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [102, 'call', 5], [104, 'call', 7]]}, ['read', 'accepted', 'denied']), ('boundary: unsecured call between read and secured call', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [101, 'call', 2], [103, 'call', 7]]}, ['read', 'accepted', 'accepted']), ('sampled regression 12', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[5, 'card', 'K1'], [3605, 'call', 12], [3615, 'call', 9], [3616, 'call', 7]]}, ['read', 'accepted', 'denied', 'denied']), ('control 15', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[89400, 'call', 9], [93000, 'call', 7]]}, ['denied', 'denied']), ('control 18', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[85810, 'card', 'K1'], [85870, 'call', 2], [85880, 'call', 5], [85889, 'call', 12], [85900, 'card', 'K2']]}, ['read', 'accepted', 'accepted', 'accepted', 'read'])], [('regression: overnight window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[82800, 'call', 9], [10800, 'call', 9], [43200, 'call', 9]]}, ['denied', 'denied', 'accepted']), ('boundary: end of the secured window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[64800, 'call', 5], [64799, 'call', 5]]}, ['accepted', 'denied']), ('sampled regression 62', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[5, 'card', 'K1'], [65, 'call', 7], [3665, 'call', 12], [3675, 'card', 'K1'], [7275, 'card', 'K1']]}, ['read', 'denied', 'accepted', 'read', 'read']), ('boundary: card without the floor', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K2'], [101, 'call', 5]]}, ['read', 'denied']), ('boundary: call ten seconds after the read', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [110, 'call', 5]]}, ['read', 'accepted']), ('control 23', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[72010, 'call', 9], [75610, 'card', 'K1'], [75615, 'call', 12], [75675, 'call', 5], [75686, 'call', 9], [75696, 'call', 5], [75705, 'call', 9]]}, ['denied', 'read', 'accepted', 'denied', 'denied', 'denied', 'denied']), ('control 26', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[85810, 'call', 2], [85819, 'card', 'K1'], [85820, 'card', 'K9'], [85825, 'call', 2]]}, ['accepted', 'read', 'read', 'accepted']), ('control 29', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[85801, 'card', 'K2'], [85812, 'call', 12], [85823, 'call', 9], [85832, 'call', 12], [85892, 'card', 'K2']]}, ['read', 'accepted', 'accepted', 'accepted', 'read'])], [('regression: overnight window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[82800, 'call', 9], [10800, 'call', 9], [43200, 'call', 9]]}, ['denied', 'denied', 'accepted']), ('boundary: end of the secured window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[64800, 'call', 5], [64799, 'call', 5]]}, ['accepted', 'denied']), ('sampled regression 24', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[9, 'call', 9], [14, 'card', 'K1'], [15, 'card', 'K9'], [25, 'card', 'K9']]}, ['denied', 'read', 'read', 'read']), ('boundary: card without the floor', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K2'], [101, 'call', 5]]}, ['read', 'denied']), ('boundary: call ten seconds after the read', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [110, 'call', 5]]}, ['read', 'accepted']), ('control 34', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[3600, 'call', 2], [3611, 'card', 'K2']]}, ['accepted', 'read']), ('control 37', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[3600, 'card', 'K9'], [3609, 'card', 'K1'], [3619, 'card', 'K1'], [7219, 'card', 'K1'], [7224, 'card', 'K1']]}, ['read', 'read', 'read', 'read', 'read']), ('sampled regression 40', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[72011, 'call', 12], [72022, 'call', 9]]}, ['accepted', 'denied'])], [('regression: overnight window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[82800, 'call', 9], [10800, 'call', 9], [43200, 'call', 9]]}, ['denied', 'denied', 'accepted']), ('boundary: end of the secured window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[64800, 'call', 5], [64799, 'call', 5]]}, ['accepted', 'denied']), ('sampled regression 53', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[72001, 'call', 2], [72061, 'call', 7]]}, ['accepted', 'denied']), ('boundary: call eleven seconds after the read', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [111, 'call', 5]]}, ['read', 'denied']), ('boundary: credential used twice', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [102, 'call', 5], [104, 'call', 7]]}, ['read', 'accepted', 'denied']), ('control 45', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[72011, 'call', 2], [72020, 'card', 'K9'], [72021, 'call', 2]]}, ['accepted', 'read', 'accepted']), ('control 48', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[25260, 'call', 5], [25265, 'card', 'K2']]}, ['accepted', 'read']), ('control 51', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[72011, 'card', 'K9'], [75611, 'call', 5], [75620, 'call', 12], [75629, 'card', 'K1']]}, ['read', 'accepted', 'accepted', 'read'])]]
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 fixture	Actual	Expected	Outcome
regression: overnight window	`['accepted', 'accepted', 'accepted']`	`['denied', 'denied', 'accepted']`	Failed
boundary: end of the secured window	`['accepted', 'denied']`	`['accepted', 'denied']`	Passed
sampled regression 8	`['accepted', 'accepted', 'accepted', 'read', 'accepted', 'read', 'read']`	`['denied', 'accepted', 'denied', 'read', 'accepted', 'read', 'read']`	Failed
boundary: call ten seconds after the read	`['read', 'accepted']`	`['read', 'accepted']`	Passed
boundary: call eleven seconds after the read	`['read', 'denied']`	`['read', 'denied']`	Passed
control 1	`['read', 'read', 'accepted']`	`['read', 'read', 'accepted']`	Passed
sampled regression 4	`['accepted', 'accepted', 'read', 'accepted']`	`['denied', 'accepted', 'read', 'accepted']`	Failed
control 7	`['read', 'accepted', 'read', 'accepted', 'read']`	`['read', 'accepted', 'read', 'accepted', 'read']`	Passed

SHA-256 / 829039baca18bf2113c0adae78e5ba13ea7a81ad56d5a2dec21053d4f7a2b56c

2 / The unsuccessful fix

Exit 1

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

N = 1
observations = []
def solve(x):
    cards = x['cards']
    restricted = set(x['restricted'])
    lo, hi = x['secure_hours']
    card = None
    card_t = None
    out = []
    for t, kind, v in x['events']:
        if kind == 'card':
            card = v
            card_t = t
            out.append('read')
            continue
        hour = (t // 3600) % 24
        in_window = (lo <= hour <= hi) if lo <= hi else (hour >= lo or hour <= hi)
        if v not in restricted or not in_window:
            out.append('accepted')
        elif card is not None and t - card_t <= 10 and v in cards.get(card, []):
            out.append('accepted')
            card = None
        else:
            out.append('denied')
    return out
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('regression: overnight window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[82800, 'call', 9], [10800, 'call', 9], [43200, 'call', 9]]}, ['denied', 'denied', 'accepted']), ('boundary: end of the secured window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[64800, 'call', 5], [64799, 'call', 5]]}, ['accepted', 'denied']), ('sampled regression 8', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[10, 'call', 5], [3610, 'call', 12], [3670, 'call', 5], [7270, 'card', 'K9'], [7279, 'call', 12], [7339, 'card', 'K2'], [7340, 'card', 'K2']]}, ['denied', 'accepted', 'denied', 'read', 'accepted', 'read', 'read']), ('boundary: call ten seconds after the read', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [110, 'call', 5]]}, ['read', 'accepted']), ('boundary: call eleven seconds after the read', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [111, 'call', 5]]}, ['read', 'denied']), ('control 1', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[9, 'card', 'K1'], [14, 'card', 'K1'], [23, 'call', 2]]}, ['read', 'read', 'accepted']), ('sampled regression 4', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[10, 'call', 7], [3610, 'call', 2], [3615, 'card', 'K9'], [3625, 'call', 2]]}, ['denied', 'accepted', 'read', 'accepted']), ('control 7', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[85810, 'card', 'K1'], [85811, 'call', 7], [85812, 'card', 'K1'], [85821, 'call', 5], [85831, 'card', 'K2']]}, ['read', 'accepted', 'read', 'accepted', 'read'])], [('regression: overnight window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[82800, 'call', 9], [10800, 'call', 9], [43200, 'call', 9]]}, ['denied', 'denied', 'accepted']), ('boundary: end of the secured window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[64800, 'call', 5], [64799, 'call', 5]]}, ['accepted', 'denied']), ('sampled regression 40', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[72011, 'call', 12], [72022, 'call', 9]]}, ['accepted', 'denied']), ('boundary: credential used twice', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [102, 'call', 5], [104, 'call', 7]]}, ['read', 'accepted', 'denied']), ('boundary: unsecured call between read and secured call', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [101, 'call', 2], [103, 'call', 7]]}, ['read', 'accepted', 'accepted']), ('sampled regression 12', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[5, 'card', 'K1'], [3605, 'call', 12], [3615, 'call', 9], [3616, 'call', 7]]}, ['read', 'accepted', 'denied', 'denied']), ('control 15', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[89400, 'call', 9], [93000, 'call', 7]]}, ['denied', 'denied']), ('control 18', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[85810, 'card', 'K1'], [85870, 'call', 2], [85880, 'call', 5], [85889, 'call', 12], [85900, 'card', 'K2']]}, ['read', 'accepted', 'accepted', 'accepted', 'read'])], [('regression: overnight window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[82800, 'call', 9], [10800, 'call', 9], [43200, 'call', 9]]}, ['denied', 'denied', 'accepted']), ('boundary: end of the secured window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[64800, 'call', 5], [64799, 'call', 5]]}, ['accepted', 'denied']), ('sampled regression 62', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[5, 'card', 'K1'], [65, 'call', 7], [3665, 'call', 12], [3675, 'card', 'K1'], [7275, 'card', 'K1']]}, ['read', 'denied', 'accepted', 'read', 'read']), ('boundary: card without the floor', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K2'], [101, 'call', 5]]}, ['read', 'denied']), ('boundary: call ten seconds after the read', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [110, 'call', 5]]}, ['read', 'accepted']), ('control 23', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[72010, 'call', 9], [75610, 'card', 'K1'], [75615, 'call', 12], [75675, 'call', 5], [75686, 'call', 9], [75696, 'call', 5], [75705, 'call', 9]]}, ['denied', 'read', 'accepted', 'denied', 'denied', 'denied', 'denied']), ('control 26', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[85810, 'call', 2], [85819, 'card', 'K1'], [85820, 'card', 'K9'], [85825, 'call', 2]]}, ['accepted', 'read', 'read', 'accepted']), ('control 29', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[85801, 'card', 'K2'], [85812, 'call', 12], [85823, 'call', 9], [85832, 'call', 12], [85892, 'card', 'K2']]}, ['read', 'accepted', 'accepted', 'accepted', 'read'])], [('regression: overnight window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[82800, 'call', 9], [10800, 'call', 9], [43200, 'call', 9]]}, ['denied', 'denied', 'accepted']), ('boundary: end of the secured window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[64800, 'call', 5], [64799, 'call', 5]]}, ['accepted', 'denied']), ('sampled regression 24', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[9, 'call', 9], [14, 'card', 'K1'], [15, 'card', 'K9'], [25, 'card', 'K9']]}, ['denied', 'read', 'read', 'read']), ('boundary: card without the floor', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K2'], [101, 'call', 5]]}, ['read', 'denied']), ('boundary: call ten seconds after the read', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [110, 'call', 5]]}, ['read', 'accepted']), ('control 34', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[3600, 'call', 2], [3611, 'card', 'K2']]}, ['accepted', 'read']), ('control 37', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[3600, 'card', 'K9'], [3609, 'card', 'K1'], [3619, 'card', 'K1'], [7219, 'card', 'K1'], [7224, 'card', 'K1']]}, ['read', 'read', 'read', 'read', 'read']), ('sampled regression 40', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[72011, 'call', 12], [72022, 'call', 9]]}, ['accepted', 'denied'])], [('regression: overnight window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[82800, 'call', 9], [10800, 'call', 9], [43200, 'call', 9]]}, ['denied', 'denied', 'accepted']), ('boundary: end of the secured window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[64800, 'call', 5], [64799, 'call', 5]]}, ['accepted', 'denied']), ('sampled regression 53', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[72001, 'call', 2], [72061, 'call', 7]]}, ['accepted', 'denied']), ('boundary: call eleven seconds after the read', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [111, 'call', 5]]}, ['read', 'denied']), ('boundary: credential used twice', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [102, 'call', 5], [104, 'call', 7]]}, ['read', 'accepted', 'denied']), ('control 45', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[72011, 'call', 2], [72020, 'card', 'K9'], [72021, 'call', 2]]}, ['accepted', 'read', 'accepted']), ('control 48', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[25260, 'call', 5], [25265, 'card', 'K2']]}, ['accepted', 'read']), ('control 51', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[72011, 'card', 'K9'], [75611, 'call', 5], [75620, 'call', 12], [75629, 'card', 'K1']]}, ['read', 'accepted', 'accepted', 'read'])]]
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 fixture	Actual	Expected	Outcome
regression: overnight window	`['denied', 'denied', 'accepted']`	`['denied', 'denied', 'accepted']`	Passed
boundary: end of the secured window	`['denied', 'denied']`	`['accepted', 'denied']`	Failed
sampled regression 8	`['denied', 'accepted', 'denied', 'read', 'accepted', 'read', 'read']`	`['denied', 'accepted', 'denied', 'read', 'accepted', 'read', 'read']`	Passed
boundary: call ten seconds after the read	`['read', 'accepted']`	`['read', 'accepted']`	Passed
boundary: call eleven seconds after the read	`['read', 'denied']`	`['read', 'denied']`	Passed
control 1	`['read', 'read', 'accepted']`	`['read', 'read', 'accepted']`	Passed
sampled regression 4	`['denied', 'accepted', 'read', 'accepted']`	`['denied', 'accepted', 'read', 'accepted']`	Passed
control 7	`['read', 'accepted', 'read', 'accepted', 'read']`	`['read', 'accepted', 'read', 'accepted', 'read']`	Passed

SHA-256 / c916fb97de66998675d400f57a1c9501e1af9b65512c433396538c23ea3b909d

3 / The verified repair

Exit 0

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

N = 1
observations = []
def solve(x):
    cards = x['cards']
    restricted = set(x['restricted'])
    lo, hi = x['secure_hours']
    card = None
    card_t = None
    out = []
    for t, kind, v in x['events']:
        if kind == 'card':
            card = v
            card_t = t
            out.append('read')
            continue
        hour = (t // 3600) % 24
        in_window = (lo <= hour < hi) if lo <= hi else (hour >= lo or hour < hi)
        if v not in restricted or not in_window:
            out.append('accepted')
        elif card is not None and t - card_t <= 10 and v in cards.get(card, []):
            out.append('accepted')
            card = None
        else:
            out.append('denied')
    return out
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('regression: overnight window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[82800, 'call', 9], [10800, 'call', 9], [43200, 'call', 9]]}, ['denied', 'denied', 'accepted']), ('boundary: end of the secured window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[64800, 'call', 5], [64799, 'call', 5]]}, ['accepted', 'denied']), ('sampled regression 8', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[10, 'call', 5], [3610, 'call', 12], [3670, 'call', 5], [7270, 'card', 'K9'], [7279, 'call', 12], [7339, 'card', 'K2'], [7340, 'card', 'K2']]}, ['denied', 'accepted', 'denied', 'read', 'accepted', 'read', 'read']), ('boundary: call ten seconds after the read', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [110, 'call', 5]]}, ['read', 'accepted']), ('boundary: call eleven seconds after the read', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [111, 'call', 5]]}, ['read', 'denied']), ('control 1', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[9, 'card', 'K1'], [14, 'card', 'K1'], [23, 'call', 2]]}, ['read', 'read', 'accepted']), ('sampled regression 4', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[10, 'call', 7], [3610, 'call', 2], [3615, 'card', 'K9'], [3625, 'call', 2]]}, ['denied', 'accepted', 'read', 'accepted']), ('control 7', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[85810, 'card', 'K1'], [85811, 'call', 7], [85812, 'card', 'K1'], [85821, 'call', 5], [85831, 'card', 'K2']]}, ['read', 'accepted', 'read', 'accepted', 'read'])], [('regression: overnight window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[82800, 'call', 9], [10800, 'call', 9], [43200, 'call', 9]]}, ['denied', 'denied', 'accepted']), ('boundary: end of the secured window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[64800, 'call', 5], [64799, 'call', 5]]}, ['accepted', 'denied']), ('sampled regression 40', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[72011, 'call', 12], [72022, 'call', 9]]}, ['accepted', 'denied']), ('boundary: credential used twice', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [102, 'call', 5], [104, 'call', 7]]}, ['read', 'accepted', 'denied']), ('boundary: unsecured call between read and secured call', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [101, 'call', 2], [103, 'call', 7]]}, ['read', 'accepted', 'accepted']), ('sampled regression 12', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[5, 'card', 'K1'], [3605, 'call', 12], [3615, 'call', 9], [3616, 'call', 7]]}, ['read', 'accepted', 'denied', 'denied']), ('control 15', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[89400, 'call', 9], [93000, 'call', 7]]}, ['denied', 'denied']), ('control 18', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[85810, 'card', 'K1'], [85870, 'call', 2], [85880, 'call', 5], [85889, 'call', 12], [85900, 'card', 'K2']]}, ['read', 'accepted', 'accepted', 'accepted', 'read'])], [('regression: overnight window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[82800, 'call', 9], [10800, 'call', 9], [43200, 'call', 9]]}, ['denied', 'denied', 'accepted']), ('boundary: end of the secured window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[64800, 'call', 5], [64799, 'call', 5]]}, ['accepted', 'denied']), ('sampled regression 62', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[5, 'card', 'K1'], [65, 'call', 7], [3665, 'call', 12], [3675, 'card', 'K1'], [7275, 'card', 'K1']]}, ['read', 'denied', 'accepted', 'read', 'read']), ('boundary: card without the floor', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K2'], [101, 'call', 5]]}, ['read', 'denied']), ('boundary: call ten seconds after the read', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [110, 'call', 5]]}, ['read', 'accepted']), ('control 23', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[72010, 'call', 9], [75610, 'card', 'K1'], [75615, 'call', 12], [75675, 'call', 5], [75686, 'call', 9], [75696, 'call', 5], [75705, 'call', 9]]}, ['denied', 'read', 'accepted', 'denied', 'denied', 'denied', 'denied']), ('control 26', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[85810, 'call', 2], [85819, 'card', 'K1'], [85820, 'card', 'K9'], [85825, 'call', 2]]}, ['accepted', 'read', 'read', 'accepted']), ('control 29', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[85801, 'card', 'K2'], [85812, 'call', 12], [85823, 'call', 9], [85832, 'call', 12], [85892, 'card', 'K2']]}, ['read', 'accepted', 'accepted', 'accepted', 'read'])], [('regression: overnight window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[82800, 'call', 9], [10800, 'call', 9], [43200, 'call', 9]]}, ['denied', 'denied', 'accepted']), ('boundary: end of the secured window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[64800, 'call', 5], [64799, 'call', 5]]}, ['accepted', 'denied']), ('sampled regression 24', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[9, 'call', 9], [14, 'card', 'K1'], [15, 'card', 'K9'], [25, 'card', 'K9']]}, ['denied', 'read', 'read', 'read']), ('boundary: card without the floor', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K2'], [101, 'call', 5]]}, ['read', 'denied']), ('boundary: call ten seconds after the read', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [110, 'call', 5]]}, ['read', 'accepted']), ('control 34', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[3600, 'call', 2], [3611, 'card', 'K2']]}, ['accepted', 'read']), ('control 37', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[3600, 'card', 'K9'], [3609, 'card', 'K1'], [3619, 'card', 'K1'], [7219, 'card', 'K1'], [7224, 'card', 'K1']]}, ['read', 'read', 'read', 'read', 'read']), ('sampled regression 40', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[72011, 'call', 12], [72022, 'call', 9]]}, ['accepted', 'denied'])], [('regression: overnight window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[82800, 'call', 9], [10800, 'call', 9], [43200, 'call', 9]]}, ['denied', 'denied', 'accepted']), ('boundary: end of the secured window', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[64800, 'call', 5], [64799, 'call', 5]]}, ['accepted', 'denied']), ('sampled regression 53', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[72001, 'call', 2], [72061, 'call', 7]]}, ['accepted', 'denied']), ('boundary: call eleven seconds after the read', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [111, 'call', 5]]}, ['read', 'denied']), ('boundary: credential used twice', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [0, 24], 'events': [[100, 'card', 'K1'], [102, 'call', 5], [104, 'call', 7]]}, ['read', 'accepted', 'denied']), ('control 45', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[72011, 'call', 2], [72020, 'card', 'K9'], [72021, 'call', 2]]}, ['accepted', 'read', 'accepted']), ('control 48', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [20, 6], 'events': [[25260, 'call', 5], [25265, 'card', 'K2']]}, ['accepted', 'read']), ('control 51', {'restricted': [5, 7, 9], 'cards': {'K1': [5, 7], 'K2': [9]}, 'secure_hours': [8, 18], 'events': [[72011, 'card', 'K9'], [75611, 'call', 5], [75620, 'call', 12], [75629, 'card', 'K1']]}, ['read', 'accepted', 'accepted', 'read'])]]
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 fixture	Actual	Expected	Outcome
regression: overnight window	`['denied', 'denied', 'accepted']`	`['denied', 'denied', 'accepted']`	Passed
boundary: end of the secured window	`['accepted', 'denied']`	`['accepted', 'denied']`	Passed
sampled regression 8	`['denied', 'accepted', 'denied', 'read', 'accepted', 'read', 'read']`	`['denied', 'accepted', 'denied', 'read', 'accepted', 'read', 'read']`	Passed
boundary: call ten seconds after the read	`['read', 'accepted']`	`['read', 'accepted']`	Passed
boundary: call eleven seconds after the read	`['read', 'denied']`	`['read', 'denied']`	Passed
control 1	`['read', 'read', 'accepted']`	`['read', 'read', 'accepted']`	Passed
sampled regression 4	`['denied', 'accepted', 'read', 'accepted']`	`['denied', 'accepted', 'read', 'accepted']`	Passed
control 7	`['read', 'accepted', 'read', 'accepted', 'read']`	`['read', 'accepted', 'read', 'accepted', 'read']`	Passed

SHA-256 / 008beb4c55b4555b5a6d17c38dc63cd059e8245cc13b26fafd5f6b900242a7e0

Verification & scope

Stipulated toy lift-control contract for a bounded teaching model; it makes no claim of conformance to any lift code or vendor dispatcher and omits real safety cases. 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 2026-09-29T14:47:55.266288+00:00.

Case digest / 3f84f686c6f25a8fd71abb6022f687f912d39557f3dd7e0ebafd3cbfc3e80f82