FAILURE MAP
← Case archive

FA-85576 / Ride-hailing fare and surge pricing / Open access

Quest bonus paid on every trip after the threshold · case 01

After the tenth trip each further trip repeats the 10-trip bonus.

Verified by executionVariant 1 · 7 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

The quest test uses >= instead of detecting the crossing trip.

THE FAILURE

The quest test uses >= instead of detecting the crossing trip.

Unsuccessful approach: Comparing the count before this trip pays one trip late.

Case contract

Driver pay per trip in cents: the surged core fare (core x surge tenths, half up) minus the commission percentage (floored), raised to min_pay if lower; tolls and tips pass through untouched and are outside commission and the minimum; the booking fee is platform revenue. A quest bonus is paid when this trip is exactly the Nth trip for a quest threshold N (trips_before + 1 == N). Return pay and bonus.

Why this case matters

Ride-hailing prices are computed per trip at scale; ordering, unit and boundary slips become systematic over- or under-charging.

1 / The failure

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

N = 1
observations = []
def solve(trip, plan):
    surged = (trip['core'] * trip['surge'] * 2 + 10) // 20
    share = surged * (100 - plan['commission']) // 100
    share = max(share, plan['min_pay'])
    pay = share + trip['tolls'] + trip['tip']
    n = plan['trips_before'] + 1
    bonus = 0
    for need, amount in plan['quests']:
        if n >= need:
            bonus += amount
    return {'pay': pay, 'bonus': bonus}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('regression: quest crossing',
   [{'booking_fee': 0, 'core': 900, 'surge': 15, 'tip': 0, 'tolls': 300},
    {'commission': 25, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 19}],
   {'bonus': 2500, 'pay': 1312}),
  ('partial repair probe: quest crossing',
   [{'booking_fee': 250, 'core': 900, 'surge': 10, 'tip': 200, 'tolls': 0},
    {'commission': 20, 'min_pay': 700, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 9}],
   {'bonus': 1500, 'pay': 920}),
  ('second regression',
   [{'booking_fee': 250, 'core': 2500, 'surge': 20, 'tip': 0, 'tolls': 0},
    {'commission': 25, 'min_pay': 700, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 20}],
   {'bonus': 0, 'pay': 3750}),
  ('normal control 1',
   [{'booking_fee': 250, 'core': 450, 'surge': 12, 'tip': 200, 'tolls': 300},
    {'commission': 25, 'min_pay': 500, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 1000}),
  ('normal control 2',
   [{'booking_fee': 0, 'core': 450, 'surge': 15, 'tip': 200, 'tolls': 0},
    {'commission': 25, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 706}),
  ('normal control 3',
   [{'booking_fee': 0, 'core': 1733, 'surge': 15, 'tip': 500, 'tolls': 0},
    {'commission': 20, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 2580}),
  ('normal control 4',
   [{'booking_fee': 0, 'core': 900, 'surge': 10, 'tip': 500, 'tolls': 300},
    {'commission': 20, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 1520})],
 [('regression: quest crossing',
   [{'booking_fee': 0, 'core': 900, 'surge': 10, 'tip': 0, 'tolls': 300},
    {'commission': 20, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 20}],
   {'bonus': 0, 'pay': 1020}),
  ('partial repair probe: quest crossing',
   [{'booking_fee': 250, 'core': 450, 'surge': 15, 'tip': 200, 'tolls': 0},
    {'commission': 25, 'min_pay': 500, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 24}],
   {'bonus': 1000, 'pay': 706}),
  ('second regression',
   [{'booking_fee': 250, 'core': 2500, 'surge': 12, 'tip': 0, 'tolls': 300},
    {'commission': 25, 'min_pay': 700, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 19}],
   {'bonus': 2500, 'pay': 2550}),
  ('normal control 1',
   [{'booking_fee': 0, 'core': 2500, 'surge': 20, 'tip': 500, 'tolls': 0},
    {'commission': 25, 'min_pay': 700, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 4250}),
  ('normal control 2',
   [{'booking_fee': 0, 'core': 450, 'surge': 10, 'tip': 500, 'tolls': 300},
    {'commission': 20, 'min_pay': 500, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 1300}),
  ('normal control 3',
   [{'booking_fee': 250, 'core': 2500, 'surge': 12, 'tip': 200, 'tolls': 300},
    {'commission': 20, 'min_pay': 700, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 2900}),
  ('normal control 4',
   [{'booking_fee': 250, 'core': 1733, 'surge': 15, 'tip': 0, 'tolls': 0},
    {'commission': 20, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 2080})],
 [('regression: quest crossing',
   [{'booking_fee': 0, 'core': 450, 'surge': 15, 'tip': 0, 'tolls': 0},
    {'commission': 20, 'min_pay': 500, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 24}],
   {'bonus': 1000, 'pay': 540}),
  ('partial repair probe: quest crossing',
   [{'booking_fee': 250, 'core': 1733, 'surge': 12, 'tip': 0, 'tolls': 300},
    {'commission': 20, 'min_pay': 500, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 9}],
   {'bonus': 1500, 'pay': 1964}),
  ('second regression',
   [{'booking_fee': 250, 'core': 450, 'surge': 15, 'tip': 500, 'tolls': 300},
    {'commission': 25, 'min_pay': 700, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 19}],
   {'bonus': 2500, 'pay': 1500}),
  ('normal control 1',
   [{'booking_fee': 0, 'core': 1733, 'surge': 12, 'tip': 500, 'tolls': 0},
    {'commission': 20, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 2164}),
  ('normal control 2',
   [{'booking_fee': 0, 'core': 450, 'surge': 20, 'tip': 0, 'tolls': 300},
    {'commission': 20, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 1020}),
  ('normal control 3',
   [{'booking_fee': 0, 'core': 1733, 'surge': 12, 'tip': 200, 'tolls': 300},
    {'commission': 20, 'min_pay': 700, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 2164}),
  ('normal control 4',
   [{'booking_fee': 250, 'core': 900, 'surge': 12, 'tip': 200, 'tolls': 0},
    {'commission': 25, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 1010})],
 [('regression: quest crossing',
   [{'booking_fee': 250, 'core': 1733, 'surge': 12, 'tip': 0, 'tolls': 0},
    {'commission': 25, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 10}],
   {'bonus': 0, 'pay': 1560}),
  ('partial repair probe: quest crossing',
   [{'booking_fee': 250, 'core': 1733, 'surge': 10, 'tip': 0, 'tolls': 300},
    {'commission': 20, 'min_pay': 500, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 24}],
   {'bonus': 1000, 'pay': 1686}),
  ('second regression',
   [{'booking_fee': 0, 'core': 1733, 'surge': 15, 'tip': 0, 'tolls': 0},
    {'commission': 20, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 9}],
   {'bonus': 1500, 'pay': 2080}),
  ('normal control 1',
   [{'booking_fee': 250, 'core': 1733, 'surge': 15, 'tip': 0, 'tolls': 300},
    {'commission': 25, 'min_pay': 700, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 2250}),
  ('normal control 2',
   [{'booking_fee': 250, 'core': 900, 'surge': 12, 'tip': 200, 'tolls': 300},
    {'commission': 25, 'min_pay': 500, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 1310}),
  ('normal control 3',
   [{'booking_fee': 250, 'core': 2500, 'surge': 12, 'tip': 500, 'tolls': 0},
    {'commission': 20, 'min_pay': 700, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 2900}),
  ('normal control 4',
   [{'booking_fee': 0, 'core': 2500, 'surge': 15, 'tip': 0, 'tolls': 300},
    {'commission': 25, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 3112})],
 [('regression: quest crossing',
   [{'booking_fee': 0, 'core': 450, 'surge': 10, 'tip': 200, 'tolls': 0},
    {'commission': 20, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 19}],
   {'bonus': 2500, 'pay': 600}),
  ('partial repair probe: quest crossing',
   [{'booking_fee': 250, 'core': 450, 'surge': 12, 'tip': 500, 'tolls': 0},
    {'commission': 20, 'min_pay': 500, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 24}],
   {'bonus': 1000, 'pay': 1000}),
  ('second regression',
   [{'booking_fee': 0, 'core': 450, 'surge': 20, 'tip': 0, 'tolls': 300},
    {'commission': 25, 'min_pay': 500, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 20}],
   {'bonus': 0, 'pay': 975}),
  ('normal control 1',
   [{'booking_fee': 250, 'core': 2500, 'surge': 12, 'tip': 500, 'tolls': 300},
    {'commission': 25, 'min_pay': 700, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 3050}),
  ('normal control 2',
   [{'booking_fee': 250, 'core': 1733, 'surge': 15, 'tip': 200, 'tolls': 300},
    {'commission': 20, 'min_pay': 700, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 2580}),
  ('normal control 3',
   [{'booking_fee': 0, 'core': 450, 'surge': 15, 'tip': 500, 'tolls': 300},
    {'commission': 20, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 1340}),
  ('normal control 4',
   [{'booking_fee': 0, 'core': 900, 'surge': 20, 'tip': 500, 'tolls': 300},
    {'commission': 20, 'min_pay': 500, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 2240})]]
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: quest crossing{'bonus': 4000, 'pay': 1312}{'bonus': 2500, 'pay': 1312}Failed
partial repair probe: quest crossing{'bonus': 1500, 'pay': 920}{'bonus': 1500, 'pay': 920}Passed
second regression{'bonus': 4000, 'pay': 3750}{'bonus': 0, 'pay': 3750}Failed
normal control 1{'bonus': 0, 'pay': 1000}{'bonus': 0, 'pay': 1000}Passed
normal control 2{'bonus': 0, 'pay': 706}{'bonus': 0, 'pay': 706}Passed
normal control 3{'bonus': 0, 'pay': 2580}{'bonus': 0, 'pay': 2580}Passed
normal control 4{'bonus': 0, 'pay': 1520}{'bonus': 0, 'pay': 1520}Passed

SHA-256 / 68c86c259a615ee7a0ab60f9d6a4a373158b93d7b1f89725b78c0c66b4a6717c

2 / The unsuccessful fix

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

N = 1
observations = []
def solve(trip, plan):
    surged = (trip['core'] * trip['surge'] * 2 + 10) // 20
    share = surged * (100 - plan['commission']) // 100
    share = max(share, plan['min_pay'])
    pay = share + trip['tolls'] + trip['tip']
    n = plan['trips_before'] + 1
    bonus = 0
    for need, amount in plan['quests']:
        if plan['trips_before'] == need:
            bonus += amount
    return {'pay': pay, 'bonus': bonus}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[('regression: quest crossing',
   [{'booking_fee': 0, 'core': 900, 'surge': 15, 'tip': 0, 'tolls': 300},
    {'commission': 25, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 19}],
   {'bonus': 2500, 'pay': 1312}),
  ('partial repair probe: quest crossing',
   [{'booking_fee': 250, 'core': 900, 'surge': 10, 'tip': 200, 'tolls': 0},
    {'commission': 20, 'min_pay': 700, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 9}],
   {'bonus': 1500, 'pay': 920}),
  ('second regression',
   [{'booking_fee': 250, 'core': 2500, 'surge': 20, 'tip': 0, 'tolls': 0},
    {'commission': 25, 'min_pay': 700, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 20}],
   {'bonus': 0, 'pay': 3750}),
  ('normal control 1',
   [{'booking_fee': 250, 'core': 450, 'surge': 12, 'tip': 200, 'tolls': 300},
    {'commission': 25, 'min_pay': 500, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 1000}),
  ('normal control 2',
   [{'booking_fee': 0, 'core': 450, 'surge': 15, 'tip': 200, 'tolls': 0},
    {'commission': 25, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 706}),
  ('normal control 3',
   [{'booking_fee': 0, 'core': 1733, 'surge': 15, 'tip': 500, 'tolls': 0},
    {'commission': 20, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 2580}),
  ('normal control 4',
   [{'booking_fee': 0, 'core': 900, 'surge': 10, 'tip': 500, 'tolls': 300},
    {'commission': 20, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 1520})],
 [('regression: quest crossing',
   [{'booking_fee': 0, 'core': 900, 'surge': 10, 'tip': 0, 'tolls': 300},
    {'commission': 20, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 20}],
   {'bonus': 0, 'pay': 1020}),
  ('partial repair probe: quest crossing',
   [{'booking_fee': 250, 'core': 450, 'surge': 15, 'tip': 200, 'tolls': 0},
    {'commission': 25, 'min_pay': 500, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 24}],
   {'bonus': 1000, 'pay': 706}),
  ('second regression',
   [{'booking_fee': 250, 'core': 2500, 'surge': 12, 'tip': 0, 'tolls': 300},
    {'commission': 25, 'min_pay': 700, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 19}],
   {'bonus': 2500, 'pay': 2550}),
  ('normal control 1',
   [{'booking_fee': 0, 'core': 2500, 'surge': 20, 'tip': 500, 'tolls': 0},
    {'commission': 25, 'min_pay': 700, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 4250}),
  ('normal control 2',
   [{'booking_fee': 0, 'core': 450, 'surge': 10, 'tip': 500, 'tolls': 300},
    {'commission': 20, 'min_pay': 500, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 1300}),
  ('normal control 3',
   [{'booking_fee': 250, 'core': 2500, 'surge': 12, 'tip': 200, 'tolls': 300},
    {'commission': 20, 'min_pay': 700, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 2900}),
  ('normal control 4',
   [{'booking_fee': 250, 'core': 1733, 'surge': 15, 'tip': 0, 'tolls': 0},
    {'commission': 20, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 2080})],
 [('regression: quest crossing',
   [{'booking_fee': 0, 'core': 450, 'surge': 15, 'tip': 0, 'tolls': 0},
    {'commission': 20, 'min_pay': 500, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 24}],
   {'bonus': 1000, 'pay': 540}),
  ('partial repair probe: quest crossing',
   [{'booking_fee': 250, 'core': 1733, 'surge': 12, 'tip': 0, 'tolls': 300},
    {'commission': 20, 'min_pay': 500, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 9}],
   {'bonus': 1500, 'pay': 1964}),
  ('second regression',
   [{'booking_fee': 250, 'core': 450, 'surge': 15, 'tip': 500, 'tolls': 300},
    {'commission': 25, 'min_pay': 700, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 19}],
   {'bonus': 2500, 'pay': 1500}),
  ('normal control 1',
   [{'booking_fee': 0, 'core': 1733, 'surge': 12, 'tip': 500, 'tolls': 0},
    {'commission': 20, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 2164}),
  ('normal control 2',
   [{'booking_fee': 0, 'core': 450, 'surge': 20, 'tip': 0, 'tolls': 300},
    {'commission': 20, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 1020}),
  ('normal control 3',
   [{'booking_fee': 0, 'core': 1733, 'surge': 12, 'tip': 200, 'tolls': 300},
    {'commission': 20, 'min_pay': 700, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 2164}),
  ('normal control 4',
   [{'booking_fee': 250, 'core': 900, 'surge': 12, 'tip': 200, 'tolls': 0},
    {'commission': 25, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 1010})],
 [('regression: quest crossing',
   [{'booking_fee': 250, 'core': 1733, 'surge': 12, 'tip': 0, 'tolls': 0},
    {'commission': 25, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 10}],
   {'bonus': 0, 'pay': 1560}),
  ('partial repair probe: quest crossing',
   [{'booking_fee': 250, 'core': 1733, 'surge': 10, 'tip': 0, 'tolls': 300},
    {'commission': 20, 'min_pay': 500, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 24}],
   {'bonus': 1000, 'pay': 1686}),
  ('second regression',
   [{'booking_fee': 0, 'core': 1733, 'surge': 15, 'tip': 0, 'tolls': 0},
    {'commission': 20, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 9}],
   {'bonus': 1500, 'pay': 2080}),
  ('normal control 1',
   [{'booking_fee': 250, 'core': 1733, 'surge': 15, 'tip': 0, 'tolls': 300},
    {'commission': 25, 'min_pay': 700, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 2250}),
  ('normal control 2',
   [{'booking_fee': 250, 'core': 900, 'surge': 12, 'tip': 200, 'tolls': 300},
    {'commission': 25, 'min_pay': 500, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 1310}),
  ('normal control 3',
   [{'booking_fee': 250, 'core': 2500, 'surge': 12, 'tip': 500, 'tolls': 0},
    {'commission': 20, 'min_pay': 700, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 2900}),
  ('normal control 4',
   [{'booking_fee': 0, 'core': 2500, 'surge': 15, 'tip': 0, 'tolls': 300},
    {'commission': 25, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 3112})],
 [('regression: quest crossing',
   [{'booking_fee': 0, 'core': 450, 'surge': 10, 'tip': 200, 'tolls': 0},
    {'commission': 20, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 19}],
   {'bonus': 2500, 'pay': 600}),
  ('partial repair probe: quest crossing',
   [{'booking_fee': 250, 'core': 450, 'surge': 12, 'tip': 500, 'tolls': 0},
    {'commission': 20, 'min_pay': 500, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 24}],
   {'bonus': 1000, 'pay': 1000}),
  ('second regression',
   [{'booking_fee': 0, 'core': 450, 'surge': 20, 'tip': 0, 'tolls': 300},
    {'commission': 25, 'min_pay': 500, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 20}],
   {'bonus': 0, 'pay': 975}),
  ('normal control 1',
   [{'booking_fee': 250, 'core': 2500, 'surge': 12, 'tip': 500, 'tolls': 300},
    {'commission': 25, 'min_pay': 700, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 3050}),
  ('normal control 2',
   [{'booking_fee': 250, 'core': 1733, 'surge': 15, 'tip': 200, 'tolls': 300},
    {'commission': 20, 'min_pay': 700, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 2580}),
  ('normal control 3',
   [{'booking_fee': 0, 'core': 450, 'surge': 15, 'tip': 500, 'tolls': 300},
    {'commission': 20, 'min_pay': 400, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 1340}),
  ('normal control 4',
   [{'booking_fee': 0, 'core': 900, 'surge': 20, 'tip': 500, 'tolls': 300},
    {'commission': 20, 'min_pay': 500, 'quests': [[10, 1500], [20, 2500], [25, 1000]], 'trips_before': 3}],
   {'bonus': 0, 'pay': 2240})]]
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: quest crossing{'bonus': 0, 'pay': 1312}{'bonus': 2500, 'pay': 1312}Failed
partial repair probe: quest crossing{'bonus': 0, 'pay': 920}{'bonus': 1500, 'pay': 920}Failed
second regression{'bonus': 2500, 'pay': 3750}{'bonus': 0, 'pay': 3750}Failed
normal control 1{'bonus': 0, 'pay': 1000}{'bonus': 0, 'pay': 1000}Passed
normal control 2{'bonus': 0, 'pay': 706}{'bonus': 0, 'pay': 706}Passed
normal control 3{'bonus': 0, 'pay': 2580}{'bonus': 0, 'pay': 2580}Passed
normal control 4{'bonus': 0, 'pay': 1520}{'bonus': 0, 'pay': 1520}Passed

SHA-256 / 5833ea640f21674a67b9c08effe7bce1936193506c557ed0b92ad2353c88c149

HELD IN THE MEMBER ARCHIVE

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

This mechanism has 7 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.

Member access is invitation-based. Sign in with your invited account to inspect the repair.

Sign in to the archive ↗

Verification & scope

A deterministic toy pricing contract stipulated for this example; it does not reproduce the pricing of any real ride-hailing operator or regulator. 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 2026-09-29T14:50:41.635089+00:00.

Case digest / b1c6174c17d971ab95add46db6604fc09a181dc1e19301035f64b9caf9e46e98