FA-95021 / Warehouse slotting and bin packing / Open access

Hazmat audit: required separation treated as violation · case 01

Products separated by exactly the required number of bays are flagged.

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

ROOT CAUSE

The separation check treats a gap equal to the minimum as insufficient.

VERIFIED REPAIR

Flag only gaps strictly below the minimum separation.

Unsuccessful approach: Counting bays between locations instead of bay difference misses pairs one bay too close.

Case contract

placements [[sku, hazard class, aisle, bay]]; rules [[class_a, class_b, min_bay_gap]] apply in either order within the same aisle. A rule class matches a hazard class equal to it or a division of it ("4" matches "4.1"). A pair violates when |bay difference| < min_gap. Different SKUs only. Return sorted unique [sku_low, sku_high] pairs.

Why this case matters

Dangerous goods storage requires separation between incompatible hazard classes.

1 / The failure

Exit 1

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

N = 1
observations = []
def solve(placements, rules):
    def matches(cls, rule):
        return cls == rule or cls.startswith(rule + '.')
    found = set()
    n = len(placements)
    for i in range(n):
        for j in range(i + 1, n):
            sa, ca, aa, ba = placements[i]
            sb, cb, ab, bb = placements[j]
            if sa == sb or aa != ab:
                continue
            gap = abs(ba - bb)
            for ra, rb, min_gap in rules:
                hit = (matches(ca, ra) and matches(cb, rb)) or (matches(ca, rb) and matches(cb, ra))
                if hit and gap <= min_gap:
                    found.add(tuple(sorted([sa, sb])))
    return [list(p) for p in sorted(found)]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[['gap equal ok', [[['F', '3', 1, 4], ['O', '5.1', 1, 6]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['division match', [[['W', '4.3', 2, 2], ['C', '8', 2, 2]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['C', 'W']]], ['adjacent oxidizer', [[['F', '3', 1, 4], ['O', '5.1', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['F', 'O']]], ['same class rule', [[['P', '5.2', 1, 3], ['Q', '5.2', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['P', 'Q']]], ['reverse order', [[['O', '5.1', 1, 1], ['G', '2.1', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['G', 'O']]], ['other aisle', [[['F', '3', 1, 4], ['O', '5.1', 2, 4]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 6', [[['H0', '2.1', 1, 4], ['H1', '9', 1, 1]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 14', [[['H0', '3', 1, 5], ['H1', '2.1', 2, 4], ['H2', '9', 2, 1], ['H3', '4.3', 1, 6], ['H0', '3', 1, 4]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []]], [['generated mix 66', [[['H0', '9', 1, 1], ['H1', '4.1', 2, 6], ['H2', '2.1', 1, 2], ['H3', '5.2', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 41', [[['H0', '3', 1, 4], ['H1', '3', 2, 2], ['H2', '4.1', 1, 3], ['H3', '9', 1, 2], ['H4', '5.2', 1, 5], ['H5', '5.1', 2, 1], ['H0', '3', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['H1', 'H5']]], ['other aisle', [[['F', '3', 1, 4], ['O', '5.1', 2, 4]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['same sku twice', [[['P', '5.2', 1, 3], ['P', '5.2', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['two pairs', [[['A', '3', 1, 1], ['Z', '5.1', 1, 2], ['B', '3', 1, 5], ['C', '5.1', 1, 6]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['A', 'Z'], ['B', 'C']]], ['gap equal ok', [[['F', '3', 1, 4], ['O', '5.1', 1, 6]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 8', [[['H0', '5.1', 1, 6], ['H1', '3', 1, 1], ['H2', '5.2', 1, 2], ['H3', '2.1', 2, 1], ['H0', '5.1', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 16', [[['H0', '5.2', 1, 6], ['H1', '4.1', 1, 5], ['H2', '2.1', 1, 2], ['H3', '5.1', 1, 1], ['H4', '5.1', 1, 1], ['H5', '8', 2, 5], ['H0', '5.2', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['H0', 'H2'], ['H2', 'H3'], ['H2', 'H4']]]], [['generated mix 18', [[['H0', '8', 1, 4], ['H1', '5.1', 1, 3], ['H2', '4.1', 1, 3], ['H0', '8', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 73', [[['H0', '5.1', 1, 4], ['H1', '9', 1, 6], ['H2', '3', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['H0', 'H2']]], ['reverse order', [[['O', '5.1', 1, 1], ['G', '2.1', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['G', 'O']]], ['adjacent oxidizer', [[['F', '3', 1, 4], ['O', '5.1', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['F', 'O']]], ['division match', [[['W', '4.3', 2, 2], ['C', '8', 2, 2]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['C', 'W']]], ['same class rule', [[['P', '5.2', 1, 3], ['Q', '5.2', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['P', 'Q']]], ['generated mix 20', [[['H0', '8', 1, 5], ['H1', '5.2', 2, 2]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 28', [[['H0', '4.3', 2, 3], ['H1', '5.1', 1, 2]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []]], [['generated mix 4', [[['H0', '8', 2, 3], ['H1', '8', 1, 6], ['H2', '5.1', 2, 3], ['H3', '3', 1, 3], ['H4', '4.3', 2, 4], ['H5', '4.3', 2, 6]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['reverse order', [[['O', '5.1', 1, 1], ['G', '2.1', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['G', 'O']]], ['division match', [[['W', '4.3', 2, 2], ['C', '8', 2, 2]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['C', 'W']]], ['same class rule', [[['P', '5.2', 1, 3], ['Q', '5.2', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['P', 'Q']]], ['two pairs', [[['A', '3', 1, 1], ['Z', '5.1', 1, 2], ['B', '3', 1, 5], ['C', '5.1', 1, 6]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['A', 'Z'], ['B', 'C']]], ['gap equal ok', [[['F', '3', 1, 4], ['O', '5.1', 1, 6]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 32', [[['H0', '9', 1, 1], ['H1', '8', 2, 6], ['H2', '4.3', 2, 4], ['H3', '4.3', 2, 4], ['H4', '4.3', 2, 3], ['H0', '9', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 40', [[['H0', '9', 2, 6], ['H1', '5.1', 1, 6], ['H2', '2.1', 2, 4], ['H3', '5.2', 2, 3], ['H4', '4.1', 1, 1], ['H5', '4.3', 1, 6]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['H2', 'H3']]]], [['generated mix 69', [[['H0', '5.1', 1, 3], ['H1', '9', 2, 4], ['H2', '3', 1, 1], ['H3', '5.2', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 52', [[['H0', '5.2', 1, 1], ['H1', '8', 1, 5], ['H2', '5.2', 1, 1], ['H3', '5.1', 1, 6], ['H0', '5.2', 1, 4]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['H0', 'H2']]], ['same class rule', [[['P', '5.2', 1, 3], ['Q', '5.2', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['P', 'Q']]], ['reverse order', [[['O', '5.1', 1, 1], ['G', '2.1', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['G', 'O']]], ['adjacent oxidizer', [[['F', '3', 1, 4], ['O', '5.1', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['F', 'O']]], ['division match', [[['W', '4.3', 2, 2], ['C', '8', 2, 2]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['C', 'W']]], ['generated mix 41', [[['H0', '3', 1, 4], ['H1', '3', 2, 2], ['H2', '4.1', 1, 3], ['H3', '9', 1, 2], ['H4', '5.2', 1, 5], ['H5', '5.1', 2, 1], ['H0', '3', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['H1', 'H5']]], ['generated mix 49', [[['H0', '8', 1, 6], ['H1', '5.1', 1, 5], ['H2', '5.1', 1, 3], ['H3', '5.2', 1, 4], ['H4', '4.1', 1, 6], ['H5', '4.1', 2, 2]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['H0', 'H4']]]]]
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
gap equal ok	`[['F', 'O']]`	`[]`	Failed
division match	`[['C', 'W']]`	`[['C', 'W']]`	Passed
adjacent oxidizer	`[['F', 'O']]`	`[['F', 'O']]`	Passed
same class rule	`[['P', 'Q']]`	`[['P', 'Q']]`	Passed
reverse order	`[['G', 'O']]`	`[['G', 'O']]`	Passed
other aisle	`[]`	`[]`	Passed
generated mix 6	`[]`	`[]`	Passed
generated mix 14	`[]`	`[]`	Passed

SHA-256 / e378de75a1770e2cad72f18159cb44531f8984e1df553492c7c0a2ae62daa94e

2 / The unsuccessful fix

Exit 1

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

N = 1
observations = []
def solve(placements, rules):
    def matches(cls, rule):
        return cls == rule or cls.startswith(rule + '.')
    found = set()
    n = len(placements)
    for i in range(n):
        for j in range(i + 1, n):
            sa, ca, aa, ba = placements[i]
            sb, cb, ab, bb = placements[j]
            if sa == sb or aa != ab:
                continue
            gap = abs(ba - bb)
            for ra, rb, min_gap in rules:
                hit = (matches(ca, ra) and matches(cb, rb)) or (matches(ca, rb) and matches(cb, ra))
                if hit and gap + 1 < min_gap:
                    found.add(tuple(sorted([sa, sb])))
    return [list(p) for p in sorted(found)]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[['gap equal ok', [[['F', '3', 1, 4], ['O', '5.1', 1, 6]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['division match', [[['W', '4.3', 2, 2], ['C', '8', 2, 2]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['C', 'W']]], ['adjacent oxidizer', [[['F', '3', 1, 4], ['O', '5.1', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['F', 'O']]], ['same class rule', [[['P', '5.2', 1, 3], ['Q', '5.2', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['P', 'Q']]], ['reverse order', [[['O', '5.1', 1, 1], ['G', '2.1', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['G', 'O']]], ['other aisle', [[['F', '3', 1, 4], ['O', '5.1', 2, 4]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 6', [[['H0', '2.1', 1, 4], ['H1', '9', 1, 1]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 14', [[['H0', '3', 1, 5], ['H1', '2.1', 2, 4], ['H2', '9', 2, 1], ['H3', '4.3', 1, 6], ['H0', '3', 1, 4]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []]], [['generated mix 66', [[['H0', '9', 1, 1], ['H1', '4.1', 2, 6], ['H2', '2.1', 1, 2], ['H3', '5.2', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 41', [[['H0', '3', 1, 4], ['H1', '3', 2, 2], ['H2', '4.1', 1, 3], ['H3', '9', 1, 2], ['H4', '5.2', 1, 5], ['H5', '5.1', 2, 1], ['H0', '3', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['H1', 'H5']]], ['other aisle', [[['F', '3', 1, 4], ['O', '5.1', 2, 4]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['same sku twice', [[['P', '5.2', 1, 3], ['P', '5.2', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['two pairs', [[['A', '3', 1, 1], ['Z', '5.1', 1, 2], ['B', '3', 1, 5], ['C', '5.1', 1, 6]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['A', 'Z'], ['B', 'C']]], ['gap equal ok', [[['F', '3', 1, 4], ['O', '5.1', 1, 6]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 8', [[['H0', '5.1', 1, 6], ['H1', '3', 1, 1], ['H2', '5.2', 1, 2], ['H3', '2.1', 2, 1], ['H0', '5.1', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 16', [[['H0', '5.2', 1, 6], ['H1', '4.1', 1, 5], ['H2', '2.1', 1, 2], ['H3', '5.1', 1, 1], ['H4', '5.1', 1, 1], ['H5', '8', 2, 5], ['H0', '5.2', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['H0', 'H2'], ['H2', 'H3'], ['H2', 'H4']]]], [['generated mix 18', [[['H0', '8', 1, 4], ['H1', '5.1', 1, 3], ['H2', '4.1', 1, 3], ['H0', '8', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 73', [[['H0', '5.1', 1, 4], ['H1', '9', 1, 6], ['H2', '3', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['H0', 'H2']]], ['reverse order', [[['O', '5.1', 1, 1], ['G', '2.1', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['G', 'O']]], ['adjacent oxidizer', [[['F', '3', 1, 4], ['O', '5.1', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['F', 'O']]], ['division match', [[['W', '4.3', 2, 2], ['C', '8', 2, 2]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['C', 'W']]], ['same class rule', [[['P', '5.2', 1, 3], ['Q', '5.2', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['P', 'Q']]], ['generated mix 20', [[['H0', '8', 1, 5], ['H1', '5.2', 2, 2]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 28', [[['H0', '4.3', 2, 3], ['H1', '5.1', 1, 2]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []]], [['generated mix 4', [[['H0', '8', 2, 3], ['H1', '8', 1, 6], ['H2', '5.1', 2, 3], ['H3', '3', 1, 3], ['H4', '4.3', 2, 4], ['H5', '4.3', 2, 6]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['reverse order', [[['O', '5.1', 1, 1], ['G', '2.1', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['G', 'O']]], ['division match', [[['W', '4.3', 2, 2], ['C', '8', 2, 2]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['C', 'W']]], ['same class rule', [[['P', '5.2', 1, 3], ['Q', '5.2', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['P', 'Q']]], ['two pairs', [[['A', '3', 1, 1], ['Z', '5.1', 1, 2], ['B', '3', 1, 5], ['C', '5.1', 1, 6]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['A', 'Z'], ['B', 'C']]], ['gap equal ok', [[['F', '3', 1, 4], ['O', '5.1', 1, 6]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 32', [[['H0', '9', 1, 1], ['H1', '8', 2, 6], ['H2', '4.3', 2, 4], ['H3', '4.3', 2, 4], ['H4', '4.3', 2, 3], ['H0', '9', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 40', [[['H0', '9', 2, 6], ['H1', '5.1', 1, 6], ['H2', '2.1', 2, 4], ['H3', '5.2', 2, 3], ['H4', '4.1', 1, 1], ['H5', '4.3', 1, 6]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['H2', 'H3']]]], [['generated mix 69', [[['H0', '5.1', 1, 3], ['H1', '9', 2, 4], ['H2', '3', 1, 1], ['H3', '5.2', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 52', [[['H0', '5.2', 1, 1], ['H1', '8', 1, 5], ['H2', '5.2', 1, 1], ['H3', '5.1', 1, 6], ['H0', '5.2', 1, 4]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['H0', 'H2']]], ['same class rule', [[['P', '5.2', 1, 3], ['Q', '5.2', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['P', 'Q']]], ['reverse order', [[['O', '5.1', 1, 1], ['G', '2.1', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['G', 'O']]], ['adjacent oxidizer', [[['F', '3', 1, 4], ['O', '5.1', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['F', 'O']]], ['division match', [[['W', '4.3', 2, 2], ['C', '8', 2, 2]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['C', 'W']]], ['generated mix 41', [[['H0', '3', 1, 4], ['H1', '3', 2, 2], ['H2', '4.1', 1, 3], ['H3', '9', 1, 2], ['H4', '5.2', 1, 5], ['H5', '5.1', 2, 1], ['H0', '3', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['H1', 'H5']]], ['generated mix 49', [[['H0', '8', 1, 6], ['H1', '5.1', 1, 5], ['H2', '5.1', 1, 3], ['H3', '5.2', 1, 4], ['H4', '4.1', 1, 6], ['H5', '4.1', 2, 2]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['H0', 'H4']]]]]
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
gap equal ok	`[]`	`[]`	Passed
division match	`[]`	`[['C', 'W']]`	Failed
adjacent oxidizer	`[]`	`[['F', 'O']]`	Failed
same class rule	`[]`	`[['P', 'Q']]`	Failed
reverse order	`[]`	`[['G', 'O']]`	Failed
other aisle	`[]`	`[]`	Passed
generated mix 6	`[]`	`[]`	Passed
generated mix 14	`[]`	`[]`	Passed

SHA-256 / 51cd6411512220be9d5b7b99008c8f0dff925ac0e6f3e2aeca9de9d113a466dd

3 / The verified repair

Exit 0

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

N = 1
observations = []
def solve(placements, rules):
    def matches(cls, rule):
        return cls == rule or cls.startswith(rule + '.')
    found = set()
    n = len(placements)
    for i in range(n):
        for j in range(i + 1, n):
            sa, ca, aa, ba = placements[i]
            sb, cb, ab, bb = placements[j]
            if sa == sb or aa != ab:
                continue
            gap = abs(ba - bb)
            for ra, rb, min_gap in rules:
                hit = (matches(ca, ra) and matches(cb, rb)) or (matches(ca, rb) and matches(cb, ra))
                if hit and gap < min_gap:
                    found.add(tuple(sorted([sa, sb])))
    return [list(p) for p in sorted(found)]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [[['gap equal ok', [[['F', '3', 1, 4], ['O', '5.1', 1, 6]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['division match', [[['W', '4.3', 2, 2], ['C', '8', 2, 2]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['C', 'W']]], ['adjacent oxidizer', [[['F', '3', 1, 4], ['O', '5.1', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['F', 'O']]], ['same class rule', [[['P', '5.2', 1, 3], ['Q', '5.2', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['P', 'Q']]], ['reverse order', [[['O', '5.1', 1, 1], ['G', '2.1', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['G', 'O']]], ['other aisle', [[['F', '3', 1, 4], ['O', '5.1', 2, 4]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 6', [[['H0', '2.1', 1, 4], ['H1', '9', 1, 1]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 14', [[['H0', '3', 1, 5], ['H1', '2.1', 2, 4], ['H2', '9', 2, 1], ['H3', '4.3', 1, 6], ['H0', '3', 1, 4]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []]], [['generated mix 66', [[['H0', '9', 1, 1], ['H1', '4.1', 2, 6], ['H2', '2.1', 1, 2], ['H3', '5.2', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 41', [[['H0', '3', 1, 4], ['H1', '3', 2, 2], ['H2', '4.1', 1, 3], ['H3', '9', 1, 2], ['H4', '5.2', 1, 5], ['H5', '5.1', 2, 1], ['H0', '3', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['H1', 'H5']]], ['other aisle', [[['F', '3', 1, 4], ['O', '5.1', 2, 4]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['same sku twice', [[['P', '5.2', 1, 3], ['P', '5.2', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['two pairs', [[['A', '3', 1, 1], ['Z', '5.1', 1, 2], ['B', '3', 1, 5], ['C', '5.1', 1, 6]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['A', 'Z'], ['B', 'C']]], ['gap equal ok', [[['F', '3', 1, 4], ['O', '5.1', 1, 6]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 8', [[['H0', '5.1', 1, 6], ['H1', '3', 1, 1], ['H2', '5.2', 1, 2], ['H3', '2.1', 2, 1], ['H0', '5.1', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 16', [[['H0', '5.2', 1, 6], ['H1', '4.1', 1, 5], ['H2', '2.1', 1, 2], ['H3', '5.1', 1, 1], ['H4', '5.1', 1, 1], ['H5', '8', 2, 5], ['H0', '5.2', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['H0', 'H2'], ['H2', 'H3'], ['H2', 'H4']]]], [['generated mix 18', [[['H0', '8', 1, 4], ['H1', '5.1', 1, 3], ['H2', '4.1', 1, 3], ['H0', '8', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 73', [[['H0', '5.1', 1, 4], ['H1', '9', 1, 6], ['H2', '3', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['H0', 'H2']]], ['reverse order', [[['O', '5.1', 1, 1], ['G', '2.1', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['G', 'O']]], ['adjacent oxidizer', [[['F', '3', 1, 4], ['O', '5.1', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['F', 'O']]], ['division match', [[['W', '4.3', 2, 2], ['C', '8', 2, 2]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['C', 'W']]], ['same class rule', [[['P', '5.2', 1, 3], ['Q', '5.2', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['P', 'Q']]], ['generated mix 20', [[['H0', '8', 1, 5], ['H1', '5.2', 2, 2]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 28', [[['H0', '4.3', 2, 3], ['H1', '5.1', 1, 2]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []]], [['generated mix 4', [[['H0', '8', 2, 3], ['H1', '8', 1, 6], ['H2', '5.1', 2, 3], ['H3', '3', 1, 3], ['H4', '4.3', 2, 4], ['H5', '4.3', 2, 6]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['reverse order', [[['O', '5.1', 1, 1], ['G', '2.1', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['G', 'O']]], ['division match', [[['W', '4.3', 2, 2], ['C', '8', 2, 2]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['C', 'W']]], ['same class rule', [[['P', '5.2', 1, 3], ['Q', '5.2', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['P', 'Q']]], ['two pairs', [[['A', '3', 1, 1], ['Z', '5.1', 1, 2], ['B', '3', 1, 5], ['C', '5.1', 1, 6]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['A', 'Z'], ['B', 'C']]], ['gap equal ok', [[['F', '3', 1, 4], ['O', '5.1', 1, 6]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 32', [[['H0', '9', 1, 1], ['H1', '8', 2, 6], ['H2', '4.3', 2, 4], ['H3', '4.3', 2, 4], ['H4', '4.3', 2, 3], ['H0', '9', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 40', [[['H0', '9', 2, 6], ['H1', '5.1', 1, 6], ['H2', '2.1', 2, 4], ['H3', '5.2', 2, 3], ['H4', '4.1', 1, 1], ['H5', '4.3', 1, 6]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['H2', 'H3']]]], [['generated mix 69', [[['H0', '5.1', 1, 3], ['H1', '9', 2, 4], ['H2', '3', 1, 1], ['H3', '5.2', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], []], ['generated mix 52', [[['H0', '5.2', 1, 1], ['H1', '8', 1, 5], ['H2', '5.2', 1, 1], ['H3', '5.1', 1, 6], ['H0', '5.2', 1, 4]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['H0', 'H2']]], ['same class rule', [[['P', '5.2', 1, 3], ['Q', '5.2', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['P', 'Q']]], ['reverse order', [[['O', '5.1', 1, 1], ['G', '2.1', 1, 3]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['G', 'O']]], ['adjacent oxidizer', [[['F', '3', 1, 4], ['O', '5.1', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['F', 'O']]], ['division match', [[['W', '4.3', 2, 2], ['C', '8', 2, 2]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['C', 'W']]], ['generated mix 41', [[['H0', '3', 1, 4], ['H1', '3', 2, 2], ['H2', '4.1', 1, 3], ['H3', '9', 1, 2], ['H4', '5.2', 1, 5], ['H5', '5.1', 2, 1], ['H0', '3', 1, 5]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['H1', 'H5']]], ['generated mix 49', [[['H0', '8', 1, 6], ['H1', '5.1', 1, 5], ['H2', '5.1', 1, 3], ['H3', '5.2', 1, 4], ['H4', '4.1', 1, 6], ['H5', '4.1', 2, 2]], [['3', '5.1', 2], ['4', '8', 1], ['5.2', '5.2', 1], ['2.1', '5', 3]]], [['H0', 'H4']]]]]
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
gap equal ok	`[]`	`[]`	Passed
division match	`[['C', 'W']]`	`[['C', 'W']]`	Passed
adjacent oxidizer	`[['F', 'O']]`	`[['F', 'O']]`	Passed
same class rule	`[['P', 'Q']]`	`[['P', 'Q']]`	Passed
reverse order	`[['G', 'O']]`	`[['G', 'O']]`	Passed
other aisle	`[]`	`[]`	Passed
generated mix 6	`[]`	`[]`	Passed
generated mix 14	`[]`	`[]`	Passed

SHA-256 / 1c210243f794940b4755ab4250db4ae7a4d255d3f317329d1100c6ae6c3b30fe

Verification & scope

Stipulated bay-gap rule table; not a regulatory segregation chart. 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 2026-09-29T14:52:09.880865+00:00.

Case digest / 7e5b0e1929b23d7e362eab1e6f4c606013356fc539cef74b5c60dc1af0005ce8