FAILURE MAP
← Case archive

FA-52526 / Raster memory layout / Open access

Pixel Interleaved Sample Banks: Sample bank address drops tag or element byte width · case 01

The returned physical layout descriptor disagrees with the declared buffer mapping at address.

Verified by executionVariant 1 · 6 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

Sample bank address drops tag or element byte width The faulty expression is bank_start+sample_slot*p["b"].

THE FAILURE

Sample bank address drops tag or element byte width The faulty expression is bank_start+sample_slot*p["b"].

Unsuccessful approach: The attempted repair uses bank_start+3+sample_slot and still violates the layout contract.

Case contract

A toy 4-sample image stores samples in lane order [2,0,3,1]. Two adjacent pixels share a bank record with a three-byte bank tag; rows contain complete banks even for odd width. Return the named intermediate layout descriptor and final address fields; all quantities are integer byte offsets unless explicitly stated.

Why this case matters

Offline raster resource, upload, readback, and storage-layout regression model.

1 / The failure

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

N = 1
observations = []
def solve(p):
    p = dict(p)
    bank_columns = (p["w"]+1)//2
    lane = [1,3,0,2][p["sample"]]
    pixel_lane = p["x"]%2
    bank_index = p["y"]*bank_columns+p["x"]//2
    bank_pitch = 8*p["b"]+3
    bank_start = p["base"]+bank_index*bank_pitch
    sample_slot = pixel_lane*4+lane
    address = bank_start+sample_slot*p["b"]
    valid_lanes = 4*min(2,p["w"]-2*(p["x"]//2))
    allocation_end = p["base"]+p["h"]*bank_columns*bank_pitch
    return {'bank_columns': bank_columns, 'lane': lane, 'pixel_lane': pixel_lane, 'bank_index': bank_index, 'bank_pitch': bank_pitch, 'bank_start': bank_start, 'sample_slot': sample_slot, 'address': address, 'valid_lanes': valid_lanes, 'allocation_end': allocation_end}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
cases = {1: [({'w': 1, 'h': 1, 'x': 0, 'y': 0, 'b': 2, 'base': 11, 'sample': 0}, {'bank_columns': 1, 'lane': 1, 'pixel_lane': 0, 'bank_index': 0, 'bank_pitch': 19, 'bank_start': 11, 'sample_slot': 1, 'address': 16, 'valid_lanes': 4, 'allocation_end': 30}), ({'w': 6, 'h': 4, 'x': 1, 'y': 2, 'b': 2, 'base': 11, 'sample': 1}, {'bank_columns': 3, 'lane': 3, 'pixel_lane': 1, 'bank_index': 6, 'bank_pitch': 19, 'bank_start': 125, 'sample_slot': 7, 'address': 142, 'valid_lanes': 8, 'allocation_end': 239}), ({'w': 10, 'h': 8, 'x': 8, 'y': 6, 'b': 2, 'base': 11, 'sample': 2}, {'bank_columns': 5, 'lane': 0, 'pixel_lane': 0, 'bank_index': 34, 'bank_pitch': 19, 'bank_start': 657, 'sample_slot': 0, 'address': 660, 'valid_lanes': 8, 'allocation_end': 771}), ({'w': 16, 'h': 8, 'x': 15, 'y': 7, 'b': 2, 'base': 11, 'sample': 3}, {'bank_columns': 8, 'lane': 2, 'pixel_lane': 1, 'bank_index': 63, 'bank_pitch': 19, 'bank_start': 1208, 'sample_slot': 6, 'address': 1223, 'valid_lanes': 8, 'allocation_end': 1227}), ({'w': 18, 'h': 10, 'x': 16, 'y': 8, 'b': 2, 'base': 11, 'sample': 0}, {'bank_columns': 9, 'lane': 1, 'pixel_lane': 0, 'bank_index': 80, 'bank_pitch': 19, 'bank_start': 1531, 'sample_slot': 1, 'address': 1536, 'valid_lanes': 8, 'allocation_end': 1721}), ({'w': 7, 'h': 13, 'x': 3, 'y': 12, 'b': 2, 'base': 11, 'sample': 1}, {'bank_columns': 4, 'lane': 3, 'pixel_lane': 1, 'bank_index': 49, 'bank_pitch': 19, 'bank_start': 942, 'sample_slot': 7, 'address': 959, 'valid_lanes': 8, 'allocation_end': 999})], 2: [({'w': 1, 'h': 1, 'x': 0, 'y': 0, 'b': 3, 'base': 22, 'sample': 0}, {'bank_columns': 1, 'lane': 1, 'pixel_lane': 0, 'bank_index': 0, 'bank_pitch': 27, 'bank_start': 22, 'sample_slot': 1, 'address': 28, 'valid_lanes': 4, 'allocation_end': 49}), ({'w': 7, 'h': 5, 'x': 1, 'y': 2, 'b': 3, 'base': 22, 'sample': 1}, {'bank_columns': 4, 'lane': 3, 'pixel_lane': 1, 'bank_index': 8, 'bank_pitch': 27, 'bank_start': 238, 'sample_slot': 7, 'address': 262, 'valid_lanes': 8, 'allocation_end': 562}), ({'w': 11, 'h': 9, 'x': 8, 'y': 6, 'b': 3, 'base': 22, 'sample': 2}, {'bank_columns': 6, 'lane': 0, 'pixel_lane': 0, 'bank_index': 40, 'bank_pitch': 27, 'bank_start': 1102, 'sample_slot': 0, 'address': 1105, 'valid_lanes': 8, 'allocation_end': 1480}), ({'w': 16, 'h': 8, 'x': 15, 'y': 7, 'b': 3, 'base': 22, 'sample': 3}, {'bank_columns': 8, 'lane': 2, 'pixel_lane': 1, 'bank_index': 63, 'bank_pitch': 27, 'bank_start': 1723, 'sample_slot': 6, 'address': 1744, 'valid_lanes': 8, 'allocation_end': 1750}), ({'w': 19, 'h': 11, 'x': 16, 'y': 8, 'b': 3, 'base': 22, 'sample': 0}, {'bank_columns': 10, 'lane': 1, 'pixel_lane': 0, 'bank_index': 88, 'bank_pitch': 27, 'bank_start': 2398, 'sample_slot': 1, 'address': 2404, 'valid_lanes': 8, 'allocation_end': 2992}), ({'w': 7, 'h': 13, 'x': 3, 'y': 12, 'b': 3, 'base': 22, 'sample': 1}, {'bank_columns': 4, 'lane': 3, 'pixel_lane': 1, 'bank_index': 49, 'bank_pitch': 27, 'bank_start': 1345, 'sample_slot': 7, 'address': 1369, 'valid_lanes': 8, 'allocation_end': 1426})], 3: [({'w': 1, 'h': 1, 'x': 0, 'y': 0, 'b': 4, 'base': 33, 'sample': 0}, {'bank_columns': 1, 'lane': 1, 'pixel_lane': 0, 'bank_index': 0, 'bank_pitch': 35, 'bank_start': 33, 'sample_slot': 1, 'address': 40, 'valid_lanes': 4, 'allocation_end': 68}), ({'w': 8, 'h': 6, 'x': 1, 'y': 2, 'b': 4, 'base': 33, 'sample': 1}, {'bank_columns': 4, 'lane': 3, 'pixel_lane': 1, 'bank_index': 8, 'bank_pitch': 35, 'bank_start': 313, 'sample_slot': 7, 'address': 344, 'valid_lanes': 8, 'allocation_end': 873}), ({'w': 12, 'h': 10, 'x': 8, 'y': 6, 'b': 4, 'base': 33, 'sample': 2}, {'bank_columns': 6, 'lane': 0, 'pixel_lane': 0, 'bank_index': 40, 'bank_pitch': 35, 'bank_start': 1433, 'sample_slot': 0, 'address': 1436, 'valid_lanes': 8, 'allocation_end': 2133}), ({'w': 16, 'h': 8, 'x': 15, 'y': 7, 'b': 4, 'base': 33, 'sample': 3}, {'bank_columns': 8, 'lane': 2, 'pixel_lane': 1, 'bank_index': 63, 'bank_pitch': 35, 'bank_start': 2238, 'sample_slot': 6, 'address': 2265, 'valid_lanes': 8, 'allocation_end': 2273}), ({'w': 20, 'h': 12, 'x': 16, 'y': 8, 'b': 4, 'base': 33, 'sample': 0}, {'bank_columns': 10, 'lane': 1, 'pixel_lane': 0, 'bank_index': 88, 'bank_pitch': 35, 'bank_start': 3113, 'sample_slot': 1, 'address': 3120, 'valid_lanes': 8, 'allocation_end': 4233}), ({'w': 7, 'h': 13, 'x': 3, 'y': 12, 'b': 4, 'base': 33, 'sample': 1}, {'bank_columns': 4, 'lane': 3, 'pixel_lane': 1, 'bank_index': 49, 'bank_pitch': 35, 'bank_start': 1748, 'sample_slot': 7, 'address': 1779, 'valid_lanes': 8, 'allocation_end': 1853})], 4: [({'w': 1, 'h': 1, 'x': 0, 'y': 0, 'b': 5, 'base': 44, 'sample': 0}, {'bank_columns': 1, 'lane': 1, 'pixel_lane': 0, 'bank_index': 0, 'bank_pitch': 43, 'bank_start': 44, 'sample_slot': 1, 'address': 52, 'valid_lanes': 4, 'allocation_end': 87}), ({'w': 9, 'h': 7, 'x': 1, 'y': 2, 'b': 5, 'base': 44, 'sample': 1}, {'bank_columns': 5, 'lane': 3, 'pixel_lane': 1, 'bank_index': 10, 'bank_pitch': 43, 'bank_start': 474, 'sample_slot': 7, 'address': 512, 'valid_lanes': 8, 'allocation_end': 1549}), ({'w': 13, 'h': 11, 'x': 8, 'y': 6, 'b': 5, 'base': 44, 'sample': 2}, {'bank_columns': 7, 'lane': 0, 'pixel_lane': 0, 'bank_index': 46, 'bank_pitch': 43, 'bank_start': 2022, 'sample_slot': 0, 'address': 2025, 'valid_lanes': 8, 'allocation_end': 3355}), ({'w': 16, 'h': 8, 'x': 15, 'y': 7, 'b': 5, 'base': 44, 'sample': 3}, {'bank_columns': 8, 'lane': 2, 'pixel_lane': 1, 'bank_index': 63, 'bank_pitch': 43, 'bank_start': 2753, 'sample_slot': 6, 'address': 2786, 'valid_lanes': 8, 'allocation_end': 2796}), ({'w': 21, 'h': 13, 'x': 16, 'y': 8, 'b': 5, 'base': 44, 'sample': 0}, {'bank_columns': 11, 'lane': 1, 'pixel_lane': 0, 'bank_index': 96, 'bank_pitch': 43, 'bank_start': 4172, 'sample_slot': 1, 'address': 4180, 'valid_lanes': 8, 'allocation_end': 6193}), ({'w': 7, 'h': 13, 'x': 3, 'y': 12, 'b': 5, 'base': 44, 'sample': 1}, {'bank_columns': 4, 'lane': 3, 'pixel_lane': 1, 'bank_index': 49, 'bank_pitch': 43, 'bank_start': 2151, 'sample_slot': 7, 'address': 2189, 'valid_lanes': 8, 'allocation_end': 2280})], 5: [({'w': 1, 'h': 1, 'x': 0, 'y': 0, 'b': 6, 'base': 55, 'sample': 0}, {'bank_columns': 1, 'lane': 1, 'pixel_lane': 0, 'bank_index': 0, 'bank_pitch': 51, 'bank_start': 55, 'sample_slot': 1, 'address': 64, 'valid_lanes': 4, 'allocation_end': 106}), ({'w': 10, 'h': 8, 'x': 1, 'y': 2, 'b': 6, 'base': 55, 'sample': 1}, {'bank_columns': 5, 'lane': 3, 'pixel_lane': 1, 'bank_index': 10, 'bank_pitch': 51, 'bank_start': 565, 'sample_slot': 7, 'address': 610, 'valid_lanes': 8, 'allocation_end': 2095}), ({'w': 14, 'h': 12, 'x': 8, 'y': 6, 'b': 6, 'base': 55, 'sample': 2}, {'bank_columns': 7, 'lane': 0, 'pixel_lane': 0, 'bank_index': 46, 'bank_pitch': 51, 'bank_start': 2401, 'sample_slot': 0, 'address': 2404, 'valid_lanes': 8, 'allocation_end': 4339}), ({'w': 16, 'h': 8, 'x': 15, 'y': 7, 'b': 6, 'base': 55, 'sample': 3}, {'bank_columns': 8, 'lane': 2, 'pixel_lane': 1, 'bank_index': 63, 'bank_pitch': 51, 'bank_start': 3268, 'sample_slot': 6, 'address': 3307, 'valid_lanes': 8, 'allocation_end': 3319}), ({'w': 22, 'h': 14, 'x': 16, 'y': 8, 'b': 6, 'base': 55, 'sample': 0}, {'bank_columns': 11, 'lane': 1, 'pixel_lane': 0, 'bank_index': 96, 'bank_pitch': 51, 'bank_start': 4951, 'sample_slot': 1, 'address': 4960, 'valid_lanes': 8, 'allocation_end': 7909}), ({'w': 7, 'h': 13, 'x': 3, 'y': 12, 'b': 6, 'base': 55, 'sample': 1}, {'bank_columns': 4, 'lane': 3, 'pixel_lane': 1, 'bank_index': 49, 'bank_pitch': 51, 'bank_start': 2554, 'sample_slot': 7, 'address': 2599, 'valid_lanes': 8, 'allocation_end': 2707})]}
for i, (p, expected) in enumerate(cases[N]):
    check("layout fixture " + str(i + 1), solve(p), 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
layout fixture 1{'address': 13, 'allocation_end': 30, 'bank_columns': 1, 'bank_index': 0, 'bank_pitch': 19, 'bank_start': 11, 'lane': 1, 'pixel_lane': 0, 'sample_slot': 1, 'valid_lanes': 4}{'address': 16, 'allocation_end': 30, 'bank_columns': 1, 'bank_index': 0, 'bank_pitch': 19, 'bank_start': 11, 'lane': 1, 'pixel_lane': 0, 'sample_slot': 1, 'valid_lanes': 4}Failed
layout fixture 2{'address': 139, 'allocation_end': 239, 'bank_columns': 3, 'bank_index': 6, 'bank_pitch': 19, 'bank_start': 125, 'lane': 3, 'pixel_lane': 1, 'sample_slot': 7, 'valid_lanes': 8}{'address': 142, 'allocation_end': 239, 'bank_columns': 3, 'bank_index': 6, 'bank_pitch': 19, 'bank_start': 125, 'lane': 3, 'pixel_lane': 1, 'sample_slot': 7, 'valid_lanes': 8}Failed
layout fixture 3{'address': 657, 'allocation_end': 771, 'bank_columns': 5, 'bank_index': 34, 'bank_pitch': 19, 'bank_start': 657, 'lane': 0, 'pixel_lane': 0, 'sample_slot': 0, 'valid_lanes': 8}{'address': 660, 'allocation_end': 771, 'bank_columns': 5, 'bank_index': 34, 'bank_pitch': 19, 'bank_start': 657, 'lane': 0, 'pixel_lane': 0, 'sample_slot': 0, 'valid_lanes': 8}Failed
layout fixture 4{'address': 1220, 'allocation_end': 1227, 'bank_columns': 8, 'bank_index': 63, 'bank_pitch': 19, 'bank_start': 1208, 'lane': 2, 'pixel_lane': 1, 'sample_slot': 6, 'valid_lanes': 8}{'address': 1223, 'allocation_end': 1227, 'bank_columns': 8, 'bank_index': 63, 'bank_pitch': 19, 'bank_start': 1208, 'lane': 2, 'pixel_lane': 1, 'sample_slot': 6, 'valid_lanes': 8}Failed
layout fixture 5{'address': 1533, 'allocation_end': 1721, 'bank_columns': 9, 'bank_index': 80, 'bank_pitch': 19, 'bank_start': 1531, 'lane': 1, 'pixel_lane': 0, 'sample_slot': 1, 'valid_lanes': 8}{'address': 1536, 'allocation_end': 1721, 'bank_columns': 9, 'bank_index': 80, 'bank_pitch': 19, 'bank_start': 1531, 'lane': 1, 'pixel_lane': 0, 'sample_slot': 1, 'valid_lanes': 8}Failed
layout fixture 6{'address': 956, 'allocation_end': 999, 'bank_columns': 4, 'bank_index': 49, 'bank_pitch': 19, 'bank_start': 942, 'lane': 3, 'pixel_lane': 1, 'sample_slot': 7, 'valid_lanes': 8}{'address': 959, 'allocation_end': 999, 'bank_columns': 4, 'bank_index': 49, 'bank_pitch': 19, 'bank_start': 942, 'lane': 3, 'pixel_lane': 1, 'sample_slot': 7, 'valid_lanes': 8}Failed

SHA-256 / c4c793ba52bc59baefc48fe0bec3a8aaf808e886f2fefd302e8f793993db9c65

2 / The unsuccessful fix

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

N = 1
observations = []
def solve(p):
    p = dict(p)
    bank_columns = (p["w"]+1)//2
    lane = [1,3,0,2][p["sample"]]
    pixel_lane = p["x"]%2
    bank_index = p["y"]*bank_columns+p["x"]//2
    bank_pitch = 8*p["b"]+3
    bank_start = p["base"]+bank_index*bank_pitch
    sample_slot = pixel_lane*4+lane
    address = bank_start+3+sample_slot
    valid_lanes = 4*min(2,p["w"]-2*(p["x"]//2))
    allocation_end = p["base"]+p["h"]*bank_columns*bank_pitch
    return {'bank_columns': bank_columns, 'lane': lane, 'pixel_lane': pixel_lane, 'bank_index': bank_index, 'bank_pitch': bank_pitch, 'bank_start': bank_start, 'sample_slot': sample_slot, 'address': address, 'valid_lanes': valid_lanes, 'allocation_end': allocation_end}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
cases = {1: [({'w': 1, 'h': 1, 'x': 0, 'y': 0, 'b': 2, 'base': 11, 'sample': 0}, {'bank_columns': 1, 'lane': 1, 'pixel_lane': 0, 'bank_index': 0, 'bank_pitch': 19, 'bank_start': 11, 'sample_slot': 1, 'address': 16, 'valid_lanes': 4, 'allocation_end': 30}), ({'w': 6, 'h': 4, 'x': 1, 'y': 2, 'b': 2, 'base': 11, 'sample': 1}, {'bank_columns': 3, 'lane': 3, 'pixel_lane': 1, 'bank_index': 6, 'bank_pitch': 19, 'bank_start': 125, 'sample_slot': 7, 'address': 142, 'valid_lanes': 8, 'allocation_end': 239}), ({'w': 10, 'h': 8, 'x': 8, 'y': 6, 'b': 2, 'base': 11, 'sample': 2}, {'bank_columns': 5, 'lane': 0, 'pixel_lane': 0, 'bank_index': 34, 'bank_pitch': 19, 'bank_start': 657, 'sample_slot': 0, 'address': 660, 'valid_lanes': 8, 'allocation_end': 771}), ({'w': 16, 'h': 8, 'x': 15, 'y': 7, 'b': 2, 'base': 11, 'sample': 3}, {'bank_columns': 8, 'lane': 2, 'pixel_lane': 1, 'bank_index': 63, 'bank_pitch': 19, 'bank_start': 1208, 'sample_slot': 6, 'address': 1223, 'valid_lanes': 8, 'allocation_end': 1227}), ({'w': 18, 'h': 10, 'x': 16, 'y': 8, 'b': 2, 'base': 11, 'sample': 0}, {'bank_columns': 9, 'lane': 1, 'pixel_lane': 0, 'bank_index': 80, 'bank_pitch': 19, 'bank_start': 1531, 'sample_slot': 1, 'address': 1536, 'valid_lanes': 8, 'allocation_end': 1721}), ({'w': 7, 'h': 13, 'x': 3, 'y': 12, 'b': 2, 'base': 11, 'sample': 1}, {'bank_columns': 4, 'lane': 3, 'pixel_lane': 1, 'bank_index': 49, 'bank_pitch': 19, 'bank_start': 942, 'sample_slot': 7, 'address': 959, 'valid_lanes': 8, 'allocation_end': 999})], 2: [({'w': 1, 'h': 1, 'x': 0, 'y': 0, 'b': 3, 'base': 22, 'sample': 0}, {'bank_columns': 1, 'lane': 1, 'pixel_lane': 0, 'bank_index': 0, 'bank_pitch': 27, 'bank_start': 22, 'sample_slot': 1, 'address': 28, 'valid_lanes': 4, 'allocation_end': 49}), ({'w': 7, 'h': 5, 'x': 1, 'y': 2, 'b': 3, 'base': 22, 'sample': 1}, {'bank_columns': 4, 'lane': 3, 'pixel_lane': 1, 'bank_index': 8, 'bank_pitch': 27, 'bank_start': 238, 'sample_slot': 7, 'address': 262, 'valid_lanes': 8, 'allocation_end': 562}), ({'w': 11, 'h': 9, 'x': 8, 'y': 6, 'b': 3, 'base': 22, 'sample': 2}, {'bank_columns': 6, 'lane': 0, 'pixel_lane': 0, 'bank_index': 40, 'bank_pitch': 27, 'bank_start': 1102, 'sample_slot': 0, 'address': 1105, 'valid_lanes': 8, 'allocation_end': 1480}), ({'w': 16, 'h': 8, 'x': 15, 'y': 7, 'b': 3, 'base': 22, 'sample': 3}, {'bank_columns': 8, 'lane': 2, 'pixel_lane': 1, 'bank_index': 63, 'bank_pitch': 27, 'bank_start': 1723, 'sample_slot': 6, 'address': 1744, 'valid_lanes': 8, 'allocation_end': 1750}), ({'w': 19, 'h': 11, 'x': 16, 'y': 8, 'b': 3, 'base': 22, 'sample': 0}, {'bank_columns': 10, 'lane': 1, 'pixel_lane': 0, 'bank_index': 88, 'bank_pitch': 27, 'bank_start': 2398, 'sample_slot': 1, 'address': 2404, 'valid_lanes': 8, 'allocation_end': 2992}), ({'w': 7, 'h': 13, 'x': 3, 'y': 12, 'b': 3, 'base': 22, 'sample': 1}, {'bank_columns': 4, 'lane': 3, 'pixel_lane': 1, 'bank_index': 49, 'bank_pitch': 27, 'bank_start': 1345, 'sample_slot': 7, 'address': 1369, 'valid_lanes': 8, 'allocation_end': 1426})], 3: [({'w': 1, 'h': 1, 'x': 0, 'y': 0, 'b': 4, 'base': 33, 'sample': 0}, {'bank_columns': 1, 'lane': 1, 'pixel_lane': 0, 'bank_index': 0, 'bank_pitch': 35, 'bank_start': 33, 'sample_slot': 1, 'address': 40, 'valid_lanes': 4, 'allocation_end': 68}), ({'w': 8, 'h': 6, 'x': 1, 'y': 2, 'b': 4, 'base': 33, 'sample': 1}, {'bank_columns': 4, 'lane': 3, 'pixel_lane': 1, 'bank_index': 8, 'bank_pitch': 35, 'bank_start': 313, 'sample_slot': 7, 'address': 344, 'valid_lanes': 8, 'allocation_end': 873}), ({'w': 12, 'h': 10, 'x': 8, 'y': 6, 'b': 4, 'base': 33, 'sample': 2}, {'bank_columns': 6, 'lane': 0, 'pixel_lane': 0, 'bank_index': 40, 'bank_pitch': 35, 'bank_start': 1433, 'sample_slot': 0, 'address': 1436, 'valid_lanes': 8, 'allocation_end': 2133}), ({'w': 16, 'h': 8, 'x': 15, 'y': 7, 'b': 4, 'base': 33, 'sample': 3}, {'bank_columns': 8, 'lane': 2, 'pixel_lane': 1, 'bank_index': 63, 'bank_pitch': 35, 'bank_start': 2238, 'sample_slot': 6, 'address': 2265, 'valid_lanes': 8, 'allocation_end': 2273}), ({'w': 20, 'h': 12, 'x': 16, 'y': 8, 'b': 4, 'base': 33, 'sample': 0}, {'bank_columns': 10, 'lane': 1, 'pixel_lane': 0, 'bank_index': 88, 'bank_pitch': 35, 'bank_start': 3113, 'sample_slot': 1, 'address': 3120, 'valid_lanes': 8, 'allocation_end': 4233}), ({'w': 7, 'h': 13, 'x': 3, 'y': 12, 'b': 4, 'base': 33, 'sample': 1}, {'bank_columns': 4, 'lane': 3, 'pixel_lane': 1, 'bank_index': 49, 'bank_pitch': 35, 'bank_start': 1748, 'sample_slot': 7, 'address': 1779, 'valid_lanes': 8, 'allocation_end': 1853})], 4: [({'w': 1, 'h': 1, 'x': 0, 'y': 0, 'b': 5, 'base': 44, 'sample': 0}, {'bank_columns': 1, 'lane': 1, 'pixel_lane': 0, 'bank_index': 0, 'bank_pitch': 43, 'bank_start': 44, 'sample_slot': 1, 'address': 52, 'valid_lanes': 4, 'allocation_end': 87}), ({'w': 9, 'h': 7, 'x': 1, 'y': 2, 'b': 5, 'base': 44, 'sample': 1}, {'bank_columns': 5, 'lane': 3, 'pixel_lane': 1, 'bank_index': 10, 'bank_pitch': 43, 'bank_start': 474, 'sample_slot': 7, 'address': 512, 'valid_lanes': 8, 'allocation_end': 1549}), ({'w': 13, 'h': 11, 'x': 8, 'y': 6, 'b': 5, 'base': 44, 'sample': 2}, {'bank_columns': 7, 'lane': 0, 'pixel_lane': 0, 'bank_index': 46, 'bank_pitch': 43, 'bank_start': 2022, 'sample_slot': 0, 'address': 2025, 'valid_lanes': 8, 'allocation_end': 3355}), ({'w': 16, 'h': 8, 'x': 15, 'y': 7, 'b': 5, 'base': 44, 'sample': 3}, {'bank_columns': 8, 'lane': 2, 'pixel_lane': 1, 'bank_index': 63, 'bank_pitch': 43, 'bank_start': 2753, 'sample_slot': 6, 'address': 2786, 'valid_lanes': 8, 'allocation_end': 2796}), ({'w': 21, 'h': 13, 'x': 16, 'y': 8, 'b': 5, 'base': 44, 'sample': 0}, {'bank_columns': 11, 'lane': 1, 'pixel_lane': 0, 'bank_index': 96, 'bank_pitch': 43, 'bank_start': 4172, 'sample_slot': 1, 'address': 4180, 'valid_lanes': 8, 'allocation_end': 6193}), ({'w': 7, 'h': 13, 'x': 3, 'y': 12, 'b': 5, 'base': 44, 'sample': 1}, {'bank_columns': 4, 'lane': 3, 'pixel_lane': 1, 'bank_index': 49, 'bank_pitch': 43, 'bank_start': 2151, 'sample_slot': 7, 'address': 2189, 'valid_lanes': 8, 'allocation_end': 2280})], 5: [({'w': 1, 'h': 1, 'x': 0, 'y': 0, 'b': 6, 'base': 55, 'sample': 0}, {'bank_columns': 1, 'lane': 1, 'pixel_lane': 0, 'bank_index': 0, 'bank_pitch': 51, 'bank_start': 55, 'sample_slot': 1, 'address': 64, 'valid_lanes': 4, 'allocation_end': 106}), ({'w': 10, 'h': 8, 'x': 1, 'y': 2, 'b': 6, 'base': 55, 'sample': 1}, {'bank_columns': 5, 'lane': 3, 'pixel_lane': 1, 'bank_index': 10, 'bank_pitch': 51, 'bank_start': 565, 'sample_slot': 7, 'address': 610, 'valid_lanes': 8, 'allocation_end': 2095}), ({'w': 14, 'h': 12, 'x': 8, 'y': 6, 'b': 6, 'base': 55, 'sample': 2}, {'bank_columns': 7, 'lane': 0, 'pixel_lane': 0, 'bank_index': 46, 'bank_pitch': 51, 'bank_start': 2401, 'sample_slot': 0, 'address': 2404, 'valid_lanes': 8, 'allocation_end': 4339}), ({'w': 16, 'h': 8, 'x': 15, 'y': 7, 'b': 6, 'base': 55, 'sample': 3}, {'bank_columns': 8, 'lane': 2, 'pixel_lane': 1, 'bank_index': 63, 'bank_pitch': 51, 'bank_start': 3268, 'sample_slot': 6, 'address': 3307, 'valid_lanes': 8, 'allocation_end': 3319}), ({'w': 22, 'h': 14, 'x': 16, 'y': 8, 'b': 6, 'base': 55, 'sample': 0}, {'bank_columns': 11, 'lane': 1, 'pixel_lane': 0, 'bank_index': 96, 'bank_pitch': 51, 'bank_start': 4951, 'sample_slot': 1, 'address': 4960, 'valid_lanes': 8, 'allocation_end': 7909}), ({'w': 7, 'h': 13, 'x': 3, 'y': 12, 'b': 6, 'base': 55, 'sample': 1}, {'bank_columns': 4, 'lane': 3, 'pixel_lane': 1, 'bank_index': 49, 'bank_pitch': 51, 'bank_start': 2554, 'sample_slot': 7, 'address': 2599, 'valid_lanes': 8, 'allocation_end': 2707})]}
for i, (p, expected) in enumerate(cases[N]):
    check("layout fixture " + str(i + 1), solve(p), 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
layout fixture 1{'address': 15, 'allocation_end': 30, 'bank_columns': 1, 'bank_index': 0, 'bank_pitch': 19, 'bank_start': 11, 'lane': 1, 'pixel_lane': 0, 'sample_slot': 1, 'valid_lanes': 4}{'address': 16, 'allocation_end': 30, 'bank_columns': 1, 'bank_index': 0, 'bank_pitch': 19, 'bank_start': 11, 'lane': 1, 'pixel_lane': 0, 'sample_slot': 1, 'valid_lanes': 4}Failed
layout fixture 2{'address': 135, 'allocation_end': 239, 'bank_columns': 3, 'bank_index': 6, 'bank_pitch': 19, 'bank_start': 125, 'lane': 3, 'pixel_lane': 1, 'sample_slot': 7, 'valid_lanes': 8}{'address': 142, 'allocation_end': 239, 'bank_columns': 3, 'bank_index': 6, 'bank_pitch': 19, 'bank_start': 125, 'lane': 3, 'pixel_lane': 1, 'sample_slot': 7, 'valid_lanes': 8}Failed
layout fixture 3{'address': 660, 'allocation_end': 771, 'bank_columns': 5, 'bank_index': 34, 'bank_pitch': 19, 'bank_start': 657, 'lane': 0, 'pixel_lane': 0, 'sample_slot': 0, 'valid_lanes': 8}{'address': 660, 'allocation_end': 771, 'bank_columns': 5, 'bank_index': 34, 'bank_pitch': 19, 'bank_start': 657, 'lane': 0, 'pixel_lane': 0, 'sample_slot': 0, 'valid_lanes': 8}Passed
layout fixture 4{'address': 1217, 'allocation_end': 1227, 'bank_columns': 8, 'bank_index': 63, 'bank_pitch': 19, 'bank_start': 1208, 'lane': 2, 'pixel_lane': 1, 'sample_slot': 6, 'valid_lanes': 8}{'address': 1223, 'allocation_end': 1227, 'bank_columns': 8, 'bank_index': 63, 'bank_pitch': 19, 'bank_start': 1208, 'lane': 2, 'pixel_lane': 1, 'sample_slot': 6, 'valid_lanes': 8}Failed
layout fixture 5{'address': 1535, 'allocation_end': 1721, 'bank_columns': 9, 'bank_index': 80, 'bank_pitch': 19, 'bank_start': 1531, 'lane': 1, 'pixel_lane': 0, 'sample_slot': 1, 'valid_lanes': 8}{'address': 1536, 'allocation_end': 1721, 'bank_columns': 9, 'bank_index': 80, 'bank_pitch': 19, 'bank_start': 1531, 'lane': 1, 'pixel_lane': 0, 'sample_slot': 1, 'valid_lanes': 8}Failed
layout fixture 6{'address': 952, 'allocation_end': 999, 'bank_columns': 4, 'bank_index': 49, 'bank_pitch': 19, 'bank_start': 942, 'lane': 3, 'pixel_lane': 1, 'sample_slot': 7, 'valid_lanes': 8}{'address': 959, 'allocation_end': 999, 'bank_columns': 4, 'bank_index': 49, 'bank_pitch': 19, 'bank_start': 942, 'lane': 3, 'pixel_lane': 1, 'sample_slot': 7, 'valid_lanes': 8}Failed

SHA-256 / 49be11b9af29817e498c6cb46e9de633426b41e0653c2380300edd8282a136b0

HELD IN THE MEMBER ARCHIVE

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

This mechanism has 6 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

Stipulated deterministic toy buffer layout; not a graphics API, codec, GPU vendor tiling specification, or hardware-conformance claim. Inputs satisfy the dimensions and bounds stated by the model. 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 2026-09-29T14:45:30.057773+00:00.

Case digest / 767bd3b1ca47669a856125aa22c9cbdf880de57dbc5f01f263631a6cc607c90d