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FA-66696 / Airline fare rule evaluation / Open access

Half fares rounded once on the combined total · case 01

Two odd round-trip fares combine one unit cheaper than their rounded halves.

Verified by executionVariant 1 · 9 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

The components are summed and halved once instead of halving and rounding each component.

VERIFIED REPAIR

Round each half round-trip amount up, then sum.

Unsuccessful approach: Floor-dividing each half undercharges odd fares.

Case contract

Input {'components':[[RT amount, carrier, tariff]],'interline_ok'}. Each component contributes half its RT amount rounded up to a whole unit. All components must share one tariff ('ERR_TARIFF', checked first); multiple carriers require interline_ok ('ERR_CARRIER'). Return the summed halves.

Why this case matters

Open-jaw and end-on-end pricing combines half round-trip fares, subject to combinability conditions and per-component rounding.

1 / The failure

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json
import math
N = 1
observations = []
def solve(x):
    halves = []
    for amt, carrier, tariff in x['components']:
        halves.append(math.ceil(amt / 2))
    tariffs = {c[2] for c in x['components']}
    carriers = {c[1] for c in x['components']}
    if len(tariffs) > 1: return 'ERR_TARIFF'
    if len(carriers) > 1 and not x['interline_ok']: return 'ERR_CARRIER'
    return math.ceil(sum(c[0] for c in x['components']) / 2)
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[['odd RT fares open jaw', {'components': [[801, 'AA', 'PUB'], [659, 'AA', 'PUB']], 'interline_ok': False}, 731], ['interline allowed', {'components': [[900, 'AA', 'PUB'], [1001, 'BA', 'PUB']], 'interline_ok': True}, 951], ['interline forbidden', {'components': [[900, 'AA', 'PUB'], [1001, 'BA', 'PUB']], 'interline_ok': False}, 'ERR_CARRIER'], ['third component other tariff', {'components': [[500, 'AA', 'PUB'], [601, 'AA', 'PUB'], [703, 'AA', 'NEG']], 'interline_ok': True}, 'ERR_TARIFF'], ['tariff and carrier both differ', {'components': [[500, 'AA', 'PUB'], [601, 'LH', 'NEG']], 'interline_ok': False}, 'ERR_TARIFF'], ['single even component', {'components': [[1202, 'LH', 'NEG']], 'interline_ok': False}, 601], ['sampled case 1', {'components': [[1106, 'AA', 'PUB'], [904, 'AA', 'PUB'], [1089, 'AA', 'PUB'], [355, 'LH', 'NEG']], 'interline_ok': True}, 'ERR_TARIFF'], ['sampled case 2', {'components': [[898, 'AA', 'PUB'], [1009, 'AA', 'NEG']], 'interline_ok': True}, 'ERR_TARIFF'], ['sampled case 3', {'components': [[350, 'AA', 'NEG'], [1535, 'BA', 'NEG'], [587, 'BA', 'PUB'], [220, 'AA', 'NEG']], 'interline_ok': False}, 'ERR_TARIFF']], [['odd RT fares open jaw', {'components': [[801, 'AA', 'PUB'], [661, 'AA', 'PUB']], 'interline_ok': False}, 732], ['interline allowed', {'components': [[900, 'AA', 'PUB'], [1001, 'BA', 'PUB']], 'interline_ok': True}, 951], ['interline forbidden', {'components': [[900, 'AA', 'PUB'], [1002, 'BA', 'PUB']], 'interline_ok': False}, 'ERR_CARRIER'], ['third component other tariff', {'components': [[500, 'AA', 'PUB'], [601, 'AA', 'PUB'], [703, 'AA', 'NEG']], 'interline_ok': True}, 'ERR_TARIFF'], ['tariff and carrier both differ', {'components': [[500, 'AA', 'PUB'], [602, 'LH', 'NEG']], 'interline_ok': False}, 'ERR_TARIFF'], ['single even component', {'components': [[1204, 'LH', 'NEG']], 'interline_ok': False}, 602], ['sampled case 1', {'components': [[1455, 'LH', 'NEG'], [1654, 'AA', 'NEG'], [1091, 'BA', 'NEG'], [1846, 'LH', 'NEG']], 'interline_ok': True}, 3024], ['sampled case 2', {'components': [[887, 'LH', 'NEG']], 'interline_ok': False}, 444], ['sampled case 3', {'components': [[600, 'BA', 'PUB']], 'interline_ok': False}, 300]], [['odd RT fares open jaw', {'components': [[801, 'AA', 'PUB'], [663, 'AA', 'PUB']], 'interline_ok': False}, 733], ['interline allowed', {'components': [[900, 'AA', 'PUB'], [1001, 'BA', 'PUB']], 'interline_ok': True}, 951], ['interline forbidden', {'components': [[900, 'AA', 'PUB'], [1003, 'BA', 'PUB']], 'interline_ok': False}, 'ERR_CARRIER'], ['third component other tariff', {'components': [[500, 'AA', 'PUB'], [601, 'AA', 'PUB'], [703, 'AA', 'NEG']], 'interline_ok': True}, 'ERR_TARIFF'], ['tariff and carrier both differ', {'components': [[500, 'AA', 'PUB'], [603, 'LH', 'NEG']], 'interline_ok': False}, 'ERR_TARIFF'], ['single even component', {'components': [[1206, 'LH', 'NEG']], 'interline_ok': False}, 603], ['sampled case 1', {'components': [[1872, 'AA', 'NEG'], [1205, 'AA', 'NEG'], [851, 'AA', 'NEG'], [434, 'LH', 'NEG']], 'interline_ok': True}, 2182], ['sampled case 2', {'components': [[1006, 'AA', 'NEG'], [1939, 'BA', 'PUB'], [850, 'AA', 'PUB'], [1563, 'AA', 'PUB']], 'interline_ok': False}, 'ERR_TARIFF'], ['sampled case 3', {'components': [[305, 'BA', 'PUB']], 'interline_ok': False}, 153]], [['odd RT fares open jaw', {'components': [[801, 'AA', 'PUB'], [665, 'AA', 'PUB']], 'interline_ok': False}, 734], ['interline allowed', {'components': [[900, 'AA', 'PUB'], [1001, 'BA', 'PUB']], 'interline_ok': True}, 951], ['interline forbidden', {'components': [[900, 'AA', 'PUB'], [1004, 'BA', 'PUB']], 'interline_ok': False}, 'ERR_CARRIER'], ['third component other tariff', {'components': [[500, 'AA', 'PUB'], [601, 'AA', 'PUB'], [703, 'AA', 'NEG']], 'interline_ok': True}, 'ERR_TARIFF'], ['tariff and carrier both differ', {'components': [[500, 'AA', 'PUB'], [604, 'LH', 'NEG']], 'interline_ok': False}, 'ERR_TARIFF'], ['single even component', {'components': [[1208, 'LH', 'NEG']], 'interline_ok': False}, 604], ['sampled case 1', {'components': [[873, 'AA', 'PUB'], [230, 'BA', 'PUB']], 'interline_ok': True}, 552], ['sampled case 2', {'components': [[1819, 'AA', 'NEG'], [1744, 'AA', 'NEG'], [1758, 'BA', 'NEG']], 'interline_ok': False}, 'ERR_CARRIER'], ['sampled case 3', {'components': [[818, 'LH', 'NEG'], [1794, 'AA', 'NEG'], [1837, 'AA', 'NEG'], [631, 'AA', 'NEG']], 'interline_ok': True}, 2541]], [['odd RT fares open jaw', {'components': [[801, 'AA', 'PUB'], [667, 'AA', 'PUB']], 'interline_ok': False}, 735], ['interline allowed', {'components': [[900, 'AA', 'PUB'], [1001, 'BA', 'PUB']], 'interline_ok': True}, 951], ['interline forbidden', {'components': [[900, 'AA', 'PUB'], [1005, 'BA', 'PUB']], 'interline_ok': False}, 'ERR_CARRIER'], ['third component other tariff', {'components': [[500, 'AA', 'PUB'], [601, 'AA', 'PUB'], [703, 'AA', 'NEG']], 'interline_ok': True}, 'ERR_TARIFF'], ['tariff and carrier both differ', {'components': [[500, 'AA', 'PUB'], [605, 'LH', 'NEG']], 'interline_ok': False}, 'ERR_TARIFF'], ['single even component', {'components': [[1210, 'LH', 'NEG']], 'interline_ok': False}, 605], ['sampled case 1', {'components': [[1193, 'BA', 'NEG'], [1868, 'AA', 'PUB']], 'interline_ok': False}, 'ERR_TARIFF'], ['sampled case 2', {'components': [[1981, 'AA', 'NEG']], 'interline_ok': True}, 991], ['sampled case 3', {'components': [[1746, 'LH', 'NEG'], [1675, 'LH', 'NEG'], [1321, 'AA', 'PUB']], 'interline_ok': True}, 'ERR_TARIFF']]]
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
odd RT fares open jaw730731Failed
interline allowed951951Passed
interline forbiddenERR_CARRIERERR_CARRIERPassed
third component other tariffERR_TARIFFERR_TARIFFPassed
tariff and carrier both differERR_TARIFFERR_TARIFFPassed
single even component601601Passed
sampled case 1ERR_TARIFFERR_TARIFFPassed
sampled case 2ERR_TARIFFERR_TARIFFPassed
sampled case 3ERR_TARIFFERR_TARIFFPassed

SHA-256 / 5777230db24ebf51266f2e12108b1ed40340bb43f4e1e807fd4c697581b8f48e

2 / The unsuccessful fix

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json
import math
N = 1
observations = []
def solve(x):
    halves = []
    for amt, carrier, tariff in x['components']:
        halves.append(amt // 2)
    tariffs = {c[2] for c in x['components']}
    carriers = {c[1] for c in x['components']}
    if len(tariffs) > 1: return 'ERR_TARIFF'
    if len(carriers) > 1 and not x['interline_ok']: return 'ERR_CARRIER'
    return sum(halves)
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[['odd RT fares open jaw', {'components': [[801, 'AA', 'PUB'], [659, 'AA', 'PUB']], 'interline_ok': False}, 731], ['interline allowed', {'components': [[900, 'AA', 'PUB'], [1001, 'BA', 'PUB']], 'interline_ok': True}, 951], ['interline forbidden', {'components': [[900, 'AA', 'PUB'], [1001, 'BA', 'PUB']], 'interline_ok': False}, 'ERR_CARRIER'], ['third component other tariff', {'components': [[500, 'AA', 'PUB'], [601, 'AA', 'PUB'], [703, 'AA', 'NEG']], 'interline_ok': True}, 'ERR_TARIFF'], ['tariff and carrier both differ', {'components': [[500, 'AA', 'PUB'], [601, 'LH', 'NEG']], 'interline_ok': False}, 'ERR_TARIFF'], ['single even component', {'components': [[1202, 'LH', 'NEG']], 'interline_ok': False}, 601], ['sampled case 1', {'components': [[1106, 'AA', 'PUB'], [904, 'AA', 'PUB'], [1089, 'AA', 'PUB'], [355, 'LH', 'NEG']], 'interline_ok': True}, 'ERR_TARIFF'], ['sampled case 2', {'components': [[898, 'AA', 'PUB'], [1009, 'AA', 'NEG']], 'interline_ok': True}, 'ERR_TARIFF'], ['sampled case 3', {'components': [[350, 'AA', 'NEG'], [1535, 'BA', 'NEG'], [587, 'BA', 'PUB'], [220, 'AA', 'NEG']], 'interline_ok': False}, 'ERR_TARIFF']], [['odd RT fares open jaw', {'components': [[801, 'AA', 'PUB'], [661, 'AA', 'PUB']], 'interline_ok': False}, 732], ['interline allowed', {'components': [[900, 'AA', 'PUB'], [1001, 'BA', 'PUB']], 'interline_ok': True}, 951], ['interline forbidden', {'components': [[900, 'AA', 'PUB'], [1002, 'BA', 'PUB']], 'interline_ok': False}, 'ERR_CARRIER'], ['third component other tariff', {'components': [[500, 'AA', 'PUB'], [601, 'AA', 'PUB'], [703, 'AA', 'NEG']], 'interline_ok': True}, 'ERR_TARIFF'], ['tariff and carrier both differ', {'components': [[500, 'AA', 'PUB'], [602, 'LH', 'NEG']], 'interline_ok': False}, 'ERR_TARIFF'], ['single even component', {'components': [[1204, 'LH', 'NEG']], 'interline_ok': False}, 602], ['sampled case 1', {'components': [[1455, 'LH', 'NEG'], [1654, 'AA', 'NEG'], [1091, 'BA', 'NEG'], [1846, 'LH', 'NEG']], 'interline_ok': True}, 3024], ['sampled case 2', {'components': [[887, 'LH', 'NEG']], 'interline_ok': False}, 444], ['sampled case 3', {'components': [[600, 'BA', 'PUB']], 'interline_ok': False}, 300]], [['odd RT fares open jaw', {'components': [[801, 'AA', 'PUB'], [663, 'AA', 'PUB']], 'interline_ok': False}, 733], ['interline allowed', {'components': [[900, 'AA', 'PUB'], [1001, 'BA', 'PUB']], 'interline_ok': True}, 951], ['interline forbidden', {'components': [[900, 'AA', 'PUB'], [1003, 'BA', 'PUB']], 'interline_ok': False}, 'ERR_CARRIER'], ['third component other tariff', {'components': [[500, 'AA', 'PUB'], [601, 'AA', 'PUB'], [703, 'AA', 'NEG']], 'interline_ok': True}, 'ERR_TARIFF'], ['tariff and carrier both differ', {'components': [[500, 'AA', 'PUB'], [603, 'LH', 'NEG']], 'interline_ok': False}, 'ERR_TARIFF'], ['single even component', {'components': [[1206, 'LH', 'NEG']], 'interline_ok': False}, 603], ['sampled case 1', {'components': [[1872, 'AA', 'NEG'], [1205, 'AA', 'NEG'], [851, 'AA', 'NEG'], [434, 'LH', 'NEG']], 'interline_ok': True}, 2182], ['sampled case 2', {'components': [[1006, 'AA', 'NEG'], [1939, 'BA', 'PUB'], [850, 'AA', 'PUB'], [1563, 'AA', 'PUB']], 'interline_ok': False}, 'ERR_TARIFF'], ['sampled case 3', {'components': [[305, 'BA', 'PUB']], 'interline_ok': False}, 153]], [['odd RT fares open jaw', {'components': [[801, 'AA', 'PUB'], [665, 'AA', 'PUB']], 'interline_ok': False}, 734], ['interline allowed', {'components': [[900, 'AA', 'PUB'], [1001, 'BA', 'PUB']], 'interline_ok': True}, 951], ['interline forbidden', {'components': [[900, 'AA', 'PUB'], [1004, 'BA', 'PUB']], 'interline_ok': False}, 'ERR_CARRIER'], ['third component other tariff', {'components': [[500, 'AA', 'PUB'], [601, 'AA', 'PUB'], [703, 'AA', 'NEG']], 'interline_ok': True}, 'ERR_TARIFF'], ['tariff and carrier both differ', {'components': [[500, 'AA', 'PUB'], [604, 'LH', 'NEG']], 'interline_ok': False}, 'ERR_TARIFF'], ['single even component', {'components': [[1208, 'LH', 'NEG']], 'interline_ok': False}, 604], ['sampled case 1', {'components': [[873, 'AA', 'PUB'], [230, 'BA', 'PUB']], 'interline_ok': True}, 552], ['sampled case 2', {'components': [[1819, 'AA', 'NEG'], [1744, 'AA', 'NEG'], [1758, 'BA', 'NEG']], 'interline_ok': False}, 'ERR_CARRIER'], ['sampled case 3', {'components': [[818, 'LH', 'NEG'], [1794, 'AA', 'NEG'], [1837, 'AA', 'NEG'], [631, 'AA', 'NEG']], 'interline_ok': True}, 2541]], [['odd RT fares open jaw', {'components': [[801, 'AA', 'PUB'], [667, 'AA', 'PUB']], 'interline_ok': False}, 735], ['interline allowed', {'components': [[900, 'AA', 'PUB'], [1001, 'BA', 'PUB']], 'interline_ok': True}, 951], ['interline forbidden', {'components': [[900, 'AA', 'PUB'], [1005, 'BA', 'PUB']], 'interline_ok': False}, 'ERR_CARRIER'], ['third component other tariff', {'components': [[500, 'AA', 'PUB'], [601, 'AA', 'PUB'], [703, 'AA', 'NEG']], 'interline_ok': True}, 'ERR_TARIFF'], ['tariff and carrier both differ', {'components': [[500, 'AA', 'PUB'], [605, 'LH', 'NEG']], 'interline_ok': False}, 'ERR_TARIFF'], ['single even component', {'components': [[1210, 'LH', 'NEG']], 'interline_ok': False}, 605], ['sampled case 1', {'components': [[1193, 'BA', 'NEG'], [1868, 'AA', 'PUB']], 'interline_ok': False}, 'ERR_TARIFF'], ['sampled case 2', {'components': [[1981, 'AA', 'NEG']], 'interline_ok': True}, 991], ['sampled case 3', {'components': [[1746, 'LH', 'NEG'], [1675, 'LH', 'NEG'], [1321, 'AA', 'PUB']], 'interline_ok': True}, 'ERR_TARIFF']]]
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
odd RT fares open jaw729731Failed
interline allowed950951Failed
interline forbiddenERR_CARRIERERR_CARRIERPassed
third component other tariffERR_TARIFFERR_TARIFFPassed
tariff and carrier both differERR_TARIFFERR_TARIFFPassed
single even component601601Passed
sampled case 1ERR_TARIFFERR_TARIFFPassed
sampled case 2ERR_TARIFFERR_TARIFFPassed
sampled case 3ERR_TARIFFERR_TARIFFPassed

SHA-256 / 53300c3c8a0a97f05ceca7299bba98e9f33d83522ee963fe44c1666c0b648cfa

3 / The verified repair

Exit 0
"""Failure Map reference implementation. Python standard library only."""
import json
import math
N = 1
observations = []
def solve(x):
    halves = []
    for amt, carrier, tariff in x['components']:
        halves.append(math.ceil(amt / 2))
    tariffs = {c[2] for c in x['components']}
    carriers = {c[1] for c in x['components']}
    if len(tariffs) > 1: return 'ERR_TARIFF'
    if len(carriers) > 1 and not x['interline_ok']: return 'ERR_CARRIER'
    return sum(halves)
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[['odd RT fares open jaw', {'components': [[801, 'AA', 'PUB'], [659, 'AA', 'PUB']], 'interline_ok': False}, 731], ['interline allowed', {'components': [[900, 'AA', 'PUB'], [1001, 'BA', 'PUB']], 'interline_ok': True}, 951], ['interline forbidden', {'components': [[900, 'AA', 'PUB'], [1001, 'BA', 'PUB']], 'interline_ok': False}, 'ERR_CARRIER'], ['third component other tariff', {'components': [[500, 'AA', 'PUB'], [601, 'AA', 'PUB'], [703, 'AA', 'NEG']], 'interline_ok': True}, 'ERR_TARIFF'], ['tariff and carrier both differ', {'components': [[500, 'AA', 'PUB'], [601, 'LH', 'NEG']], 'interline_ok': False}, 'ERR_TARIFF'], ['single even component', {'components': [[1202, 'LH', 'NEG']], 'interline_ok': False}, 601], ['sampled case 1', {'components': [[1106, 'AA', 'PUB'], [904, 'AA', 'PUB'], [1089, 'AA', 'PUB'], [355, 'LH', 'NEG']], 'interline_ok': True}, 'ERR_TARIFF'], ['sampled case 2', {'components': [[898, 'AA', 'PUB'], [1009, 'AA', 'NEG']], 'interline_ok': True}, 'ERR_TARIFF'], ['sampled case 3', {'components': [[350, 'AA', 'NEG'], [1535, 'BA', 'NEG'], [587, 'BA', 'PUB'], [220, 'AA', 'NEG']], 'interline_ok': False}, 'ERR_TARIFF']], [['odd RT fares open jaw', {'components': [[801, 'AA', 'PUB'], [661, 'AA', 'PUB']], 'interline_ok': False}, 732], ['interline allowed', {'components': [[900, 'AA', 'PUB'], [1001, 'BA', 'PUB']], 'interline_ok': True}, 951], ['interline forbidden', {'components': [[900, 'AA', 'PUB'], [1002, 'BA', 'PUB']], 'interline_ok': False}, 'ERR_CARRIER'], ['third component other tariff', {'components': [[500, 'AA', 'PUB'], [601, 'AA', 'PUB'], [703, 'AA', 'NEG']], 'interline_ok': True}, 'ERR_TARIFF'], ['tariff and carrier both differ', {'components': [[500, 'AA', 'PUB'], [602, 'LH', 'NEG']], 'interline_ok': False}, 'ERR_TARIFF'], ['single even component', {'components': [[1204, 'LH', 'NEG']], 'interline_ok': False}, 602], ['sampled case 1', {'components': [[1455, 'LH', 'NEG'], [1654, 'AA', 'NEG'], [1091, 'BA', 'NEG'], [1846, 'LH', 'NEG']], 'interline_ok': True}, 3024], ['sampled case 2', {'components': [[887, 'LH', 'NEG']], 'interline_ok': False}, 444], ['sampled case 3', {'components': [[600, 'BA', 'PUB']], 'interline_ok': False}, 300]], [['odd RT fares open jaw', {'components': [[801, 'AA', 'PUB'], [663, 'AA', 'PUB']], 'interline_ok': False}, 733], ['interline allowed', {'components': [[900, 'AA', 'PUB'], [1001, 'BA', 'PUB']], 'interline_ok': True}, 951], ['interline forbidden', {'components': [[900, 'AA', 'PUB'], [1003, 'BA', 'PUB']], 'interline_ok': False}, 'ERR_CARRIER'], ['third component other tariff', {'components': [[500, 'AA', 'PUB'], [601, 'AA', 'PUB'], [703, 'AA', 'NEG']], 'interline_ok': True}, 'ERR_TARIFF'], ['tariff and carrier both differ', {'components': [[500, 'AA', 'PUB'], [603, 'LH', 'NEG']], 'interline_ok': False}, 'ERR_TARIFF'], ['single even component', {'components': [[1206, 'LH', 'NEG']], 'interline_ok': False}, 603], ['sampled case 1', {'components': [[1872, 'AA', 'NEG'], [1205, 'AA', 'NEG'], [851, 'AA', 'NEG'], [434, 'LH', 'NEG']], 'interline_ok': True}, 2182], ['sampled case 2', {'components': [[1006, 'AA', 'NEG'], [1939, 'BA', 'PUB'], [850, 'AA', 'PUB'], [1563, 'AA', 'PUB']], 'interline_ok': False}, 'ERR_TARIFF'], ['sampled case 3', {'components': [[305, 'BA', 'PUB']], 'interline_ok': False}, 153]], [['odd RT fares open jaw', {'components': [[801, 'AA', 'PUB'], [665, 'AA', 'PUB']], 'interline_ok': False}, 734], ['interline allowed', {'components': [[900, 'AA', 'PUB'], [1001, 'BA', 'PUB']], 'interline_ok': True}, 951], ['interline forbidden', {'components': [[900, 'AA', 'PUB'], [1004, 'BA', 'PUB']], 'interline_ok': False}, 'ERR_CARRIER'], ['third component other tariff', {'components': [[500, 'AA', 'PUB'], [601, 'AA', 'PUB'], [703, 'AA', 'NEG']], 'interline_ok': True}, 'ERR_TARIFF'], ['tariff and carrier both differ', {'components': [[500, 'AA', 'PUB'], [604, 'LH', 'NEG']], 'interline_ok': False}, 'ERR_TARIFF'], ['single even component', {'components': [[1208, 'LH', 'NEG']], 'interline_ok': False}, 604], ['sampled case 1', {'components': [[873, 'AA', 'PUB'], [230, 'BA', 'PUB']], 'interline_ok': True}, 552], ['sampled case 2', {'components': [[1819, 'AA', 'NEG'], [1744, 'AA', 'NEG'], [1758, 'BA', 'NEG']], 'interline_ok': False}, 'ERR_CARRIER'], ['sampled case 3', {'components': [[818, 'LH', 'NEG'], [1794, 'AA', 'NEG'], [1837, 'AA', 'NEG'], [631, 'AA', 'NEG']], 'interline_ok': True}, 2541]], [['odd RT fares open jaw', {'components': [[801, 'AA', 'PUB'], [667, 'AA', 'PUB']], 'interline_ok': False}, 735], ['interline allowed', {'components': [[900, 'AA', 'PUB'], [1001, 'BA', 'PUB']], 'interline_ok': True}, 951], ['interline forbidden', {'components': [[900, 'AA', 'PUB'], [1005, 'BA', 'PUB']], 'interline_ok': False}, 'ERR_CARRIER'], ['third component other tariff', {'components': [[500, 'AA', 'PUB'], [601, 'AA', 'PUB'], [703, 'AA', 'NEG']], 'interline_ok': True}, 'ERR_TARIFF'], ['tariff and carrier both differ', {'components': [[500, 'AA', 'PUB'], [605, 'LH', 'NEG']], 'interline_ok': False}, 'ERR_TARIFF'], ['single even component', {'components': [[1210, 'LH', 'NEG']], 'interline_ok': False}, 605], ['sampled case 1', {'components': [[1193, 'BA', 'NEG'], [1868, 'AA', 'PUB']], 'interline_ok': False}, 'ERR_TARIFF'], ['sampled case 2', {'components': [[1981, 'AA', 'NEG']], 'interline_ok': True}, 991], ['sampled case 3', {'components': [[1746, 'LH', 'NEG'], [1675, 'LH', 'NEG'], [1321, 'AA', 'PUB']], 'interline_ok': True}, 'ERR_TARIFF']]]
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
odd RT fares open jaw731731Passed
interline allowed951951Passed
interline forbiddenERR_CARRIERERR_CARRIERPassed
third component other tariffERR_TARIFFERR_TARIFFPassed
tariff and carrier both differERR_TARIFFERR_TARIFFPassed
single even component601601Passed
sampled case 1ERR_TARIFFERR_TARIFFPassed
sampled case 2ERR_TARIFFERR_TARIFFPassed
sampled case 3ERR_TARIFFERR_TARIFFPassed

SHA-256 / efbf11e2101c354605ab9730e0ba7b10b941c644c09f4f1cd0d89cd927d1fb75

Verification & scope

A stipulated toy fare-rule contract with invented constants; it is not an ATPCO or carrier tariff implementation and makes no claim of industry-standard conformance. 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 2026-09-29T14:47:46.180455+00:00.

Case digest / cfada992aa8c8393b9ac3bd51e377a18f94ab09c3a7224c4568d8df6ab1fe791