FAILURE MAP
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FA-51506 / Raster clipping / Open access

Ranked alpha clip coverage: rotation period · case 01

Rotation wraps around the covered-sample count rather than physical sample count.

Verified by executionVariant 1 · 11 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

Rotation wraps around the covered-sample count rather than physical sample count.

THE FAILURE

Rotation wraps around the covered-sample count rather than physical sample count.

Unsuccessful approach: Using the final sample index as the period loses the highest physical lane.

Case contract

Each command supplies alpha numerator over denominator, a permutation ranking the physical samples, rotation, geometric sample mask, fixed enable mask and optional shader mask. Alpha selects floor(alpha*size) ranks, clamped to [0,size]; alpha-disabled commands select all ranks. Rotate selected physical sample IDs modulo size, then intersect masks. A missing shader mask passes all samples; an explicit empty mask passes none. Return sorted surviving sample IDs.

Why this case matters

Raster clip state can leak coverage across draws even when every individual region is valid.

1 / The failure

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

N = 1
observations = []
def solve(commands, size):
    out=[]
    full=set(range(size))
    for numerator,denominator,rank,rotation,geometry,enabled,shader,alpha_enabled in commands:
        count=max(0,min(size,(numerator*size)//denominator)) if alpha_enabled else size
        ordering=[x for x in rank if x in full]
        selected={ordering[i] for i in range(min(count,len(ordering)))}
        selected={(x+rotation)%max(1,len(selected)) for x in selected}
        geometric=set(geometry)&full
        fixed=set(enabled)&full
        shader_mask=full if shader is None else set(shader)&full
        out.append(sorted(selected & geometric & fixed & shader_mask))
    return out
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
if N == 1:
    check('explicit sequence 0', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 4), [[0, 1]])
    check('explicit sequence 1', solve([[1, 7, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 4), [[]])
    check('explicit sequence 2', solve([[2, 3, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 4), [[0, 1]])
    check('explicit sequence 3', solve([[1, 3, [9, 8, 7, 6, 5, 4, 3, 2, 1, 0], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 4), [[3]])
    check('explicit sequence 4', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 4), [[1, 2]])
    check('explicit sequence 5', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], -1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 4), [[0, 3]])
    check('explicit sequence 6', solve([[0, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, False]], 4), [[0, 1, 2, 3]])
    check('explicit sequence 7', solve([[1, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [], True]], 4), [[]])
    check('explicit sequence 8', solve([[0, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 4), [[]])
    check('explicit sequence 9', solve([[1, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0], [1], True]], 4), [[]])
    check('explicit sequence 10', solve([[3, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 4), [[0, 1, 2, 3]])
if N == 2:
    check('explicit sequence 0', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 5), [[0, 1]])
    check('explicit sequence 1', solve([[1, 7, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 5), [[]])
    check('explicit sequence 2', solve([[2, 3, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 5), [[0, 1, 2]])
    check('explicit sequence 3', solve([[1, 3, [9, 8, 7, 6, 5, 4, 3, 2, 1, 0], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 5), [[4]])
    check('explicit sequence 4', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 5), [[1, 2]])
    check('explicit sequence 5', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], -1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 5), [[0, 4]])
    check('explicit sequence 6', solve([[0, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, False]], 5), [[0, 1, 2, 3, 4]])
    check('explicit sequence 7', solve([[1, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [], True]], 5), [[]])
    check('explicit sequence 8', solve([[0, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 5), [[]])
    check('explicit sequence 9', solve([[1, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0], [1], True]], 5), [[]])
    check('explicit sequence 10', solve([[3, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 5), [[0, 1, 2, 3, 4]])
if N == 3:
    check('explicit sequence 0', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 6), [[0, 1, 2]])
    check('explicit sequence 1', solve([[1, 7, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 6), [[]])
    check('explicit sequence 2', solve([[2, 3, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 6), [[0, 1, 2, 3]])
    check('explicit sequence 3', solve([[1, 3, [9, 8, 7, 6, 5, 4, 3, 2, 1, 0], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 6), [[4, 5]])
    check('explicit sequence 4', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 6), [[1, 2, 3]])
    check('explicit sequence 5', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], -1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 6), [[0, 1, 5]])
    check('explicit sequence 6', solve([[0, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, False]], 6), [[0, 1, 2, 3, 4, 5]])
    check('explicit sequence 7', solve([[1, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [], True]], 6), [[]])
    check('explicit sequence 8', solve([[0, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 6), [[]])
    check('explicit sequence 9', solve([[1, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0], [1], True]], 6), [[]])
    check('explicit sequence 10', solve([[3, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 6), [[0, 1, 2, 3, 4, 5]])
if N == 4:
    check('explicit sequence 0', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 7), [[0, 1, 2]])
    check('explicit sequence 1', solve([[1, 7, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 7), [[0]])
    check('explicit sequence 2', solve([[2, 3, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 7), [[0, 1, 2, 3]])
    check('explicit sequence 3', solve([[1, 3, [9, 8, 7, 6, 5, 4, 3, 2, 1, 0], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 7), [[5, 6]])
    check('explicit sequence 4', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 7), [[1, 2, 3]])
    check('explicit sequence 5', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], -1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 7), [[0, 1, 6]])
    check('explicit sequence 6', solve([[0, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, False]], 7), [[0, 1, 2, 3, 4, 5, 6]])
    check('explicit sequence 7', solve([[1, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [], True]], 7), [[]])
    check('explicit sequence 8', solve([[0, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 7), [[]])
    check('explicit sequence 9', solve([[1, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0], [1], True]], 7), [[]])
    check('explicit sequence 10', solve([[3, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 7), [[0, 1, 2, 3, 4, 5, 6]])
if N == 5:
    check('explicit sequence 0', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 8), [[0, 1, 2, 3]])
    check('explicit sequence 1', solve([[1, 7, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 8), [[0]])
    check('explicit sequence 2', solve([[2, 3, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 8), [[0, 1, 2, 3, 4]])
    check('explicit sequence 3', solve([[1, 3, [9, 8, 7, 6, 5, 4, 3, 2, 1, 0], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 8), [[6, 7]])
    check('explicit sequence 4', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 8), [[1, 2, 3, 4]])
    check('explicit sequence 5', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], -1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 8), [[0, 1, 2, 7]])
    check('explicit sequence 6', solve([[0, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, False]], 8), [[0, 1, 2, 3, 4, 5, 6, 7]])
    check('explicit sequence 7', solve([[1, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [], True]], 8), [[]])
    check('explicit sequence 8', solve([[0, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 8), [[]])
    check('explicit sequence 9', solve([[1, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0], [1], True]], 8), [[]])
    check('explicit sequence 10', solve([[3, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 8), [[0, 1, 2, 3, 4, 5, 6, 7]])
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
explicit sequence 0[[0, 1]][[0, 1]]Passed
explicit sequence 1[[]][[]]Passed
explicit sequence 2[[0, 1]][[0, 1]]Passed
explicit sequence 3[[0]][[3]]Failed
explicit sequence 4[[0, 1]][[1, 2]]Failed
explicit sequence 5[[0, 1]][[0, 3]]Failed
explicit sequence 6[[0, 1, 2, 3]][[0, 1, 2, 3]]Passed
explicit sequence 7[[]][[]]Passed
explicit sequence 8[[]][[]]Passed
explicit sequence 9[[]][[]]Passed
explicit sequence 10[[0, 1, 2, 3]][[0, 1, 2, 3]]Passed

SHA-256 / ef117f499a2e9377c5c60a6e4e8c6c2963c86edf531e06403f03dcd55b79891e

2 / The unsuccessful fix

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

N = 1
observations = []
def solve(commands, size):
    out=[]
    full=set(range(size))
    for numerator,denominator,rank,rotation,geometry,enabled,shader,alpha_enabled in commands:
        count=max(0,min(size,(numerator*size)//denominator)) if alpha_enabled else size
        ordering=[x for x in rank if x in full]
        selected={ordering[i] for i in range(min(count,len(ordering)))}
        selected={(x+rotation)%max(1,len(ordering)-1) for x in selected}
        geometric=set(geometry)&full
        fixed=set(enabled)&full
        shader_mask=full if shader is None else set(shader)&full
        out.append(sorted(selected & geometric & fixed & shader_mask))
    return out
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
if N == 1:
    check('explicit sequence 0', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 4), [[0, 1]])
    check('explicit sequence 1', solve([[1, 7, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 4), [[]])
    check('explicit sequence 2', solve([[2, 3, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 4), [[0, 1]])
    check('explicit sequence 3', solve([[1, 3, [9, 8, 7, 6, 5, 4, 3, 2, 1, 0], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 4), [[3]])
    check('explicit sequence 4', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 4), [[1, 2]])
    check('explicit sequence 5', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], -1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 4), [[0, 3]])
    check('explicit sequence 6', solve([[0, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, False]], 4), [[0, 1, 2, 3]])
    check('explicit sequence 7', solve([[1, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [], True]], 4), [[]])
    check('explicit sequence 8', solve([[0, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 4), [[]])
    check('explicit sequence 9', solve([[1, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0], [1], True]], 4), [[]])
    check('explicit sequence 10', solve([[3, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 4), [[0, 1, 2, 3]])
if N == 2:
    check('explicit sequence 0', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 5), [[0, 1]])
    check('explicit sequence 1', solve([[1, 7, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 5), [[]])
    check('explicit sequence 2', solve([[2, 3, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 5), [[0, 1, 2]])
    check('explicit sequence 3', solve([[1, 3, [9, 8, 7, 6, 5, 4, 3, 2, 1, 0], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 5), [[4]])
    check('explicit sequence 4', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 5), [[1, 2]])
    check('explicit sequence 5', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], -1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 5), [[0, 4]])
    check('explicit sequence 6', solve([[0, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, False]], 5), [[0, 1, 2, 3, 4]])
    check('explicit sequence 7', solve([[1, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [], True]], 5), [[]])
    check('explicit sequence 8', solve([[0, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 5), [[]])
    check('explicit sequence 9', solve([[1, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0], [1], True]], 5), [[]])
    check('explicit sequence 10', solve([[3, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 5), [[0, 1, 2, 3, 4]])
if N == 3:
    check('explicit sequence 0', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 6), [[0, 1, 2]])
    check('explicit sequence 1', solve([[1, 7, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 6), [[]])
    check('explicit sequence 2', solve([[2, 3, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 6), [[0, 1, 2, 3]])
    check('explicit sequence 3', solve([[1, 3, [9, 8, 7, 6, 5, 4, 3, 2, 1, 0], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 6), [[4, 5]])
    check('explicit sequence 4', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 6), [[1, 2, 3]])
    check('explicit sequence 5', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], -1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 6), [[0, 1, 5]])
    check('explicit sequence 6', solve([[0, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, False]], 6), [[0, 1, 2, 3, 4, 5]])
    check('explicit sequence 7', solve([[1, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [], True]], 6), [[]])
    check('explicit sequence 8', solve([[0, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 6), [[]])
    check('explicit sequence 9', solve([[1, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0], [1], True]], 6), [[]])
    check('explicit sequence 10', solve([[3, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 6), [[0, 1, 2, 3, 4, 5]])
if N == 4:
    check('explicit sequence 0', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 7), [[0, 1, 2]])
    check('explicit sequence 1', solve([[1, 7, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 7), [[0]])
    check('explicit sequence 2', solve([[2, 3, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 7), [[0, 1, 2, 3]])
    check('explicit sequence 3', solve([[1, 3, [9, 8, 7, 6, 5, 4, 3, 2, 1, 0], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 7), [[5, 6]])
    check('explicit sequence 4', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 7), [[1, 2, 3]])
    check('explicit sequence 5', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], -1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 7), [[0, 1, 6]])
    check('explicit sequence 6', solve([[0, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, False]], 7), [[0, 1, 2, 3, 4, 5, 6]])
    check('explicit sequence 7', solve([[1, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [], True]], 7), [[]])
    check('explicit sequence 8', solve([[0, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 7), [[]])
    check('explicit sequence 9', solve([[1, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0], [1], True]], 7), [[]])
    check('explicit sequence 10', solve([[3, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 7), [[0, 1, 2, 3, 4, 5, 6]])
if N == 5:
    check('explicit sequence 0', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 8), [[0, 1, 2, 3]])
    check('explicit sequence 1', solve([[1, 7, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 8), [[0]])
    check('explicit sequence 2', solve([[2, 3, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 8), [[0, 1, 2, 3, 4]])
    check('explicit sequence 3', solve([[1, 3, [9, 8, 7, 6, 5, 4, 3, 2, 1, 0], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 8), [[6, 7]])
    check('explicit sequence 4', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 8), [[1, 2, 3, 4]])
    check('explicit sequence 5', solve([[1, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], -1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 8), [[0, 1, 2, 7]])
    check('explicit sequence 6', solve([[0, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, False]], 8), [[0, 1, 2, 3, 4, 5, 6, 7]])
    check('explicit sequence 7', solve([[1, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [], True]], 8), [[]])
    check('explicit sequence 8', solve([[0, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 8), [[]])
    check('explicit sequence 9', solve([[1, 1, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0], [1], True]], 8), [[]])
    check('explicit sequence 10', solve([[3, 2, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 0, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], None, True]], 8), [[0, 1, 2, 3, 4, 5, 6, 7]])
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
explicit sequence 0[[0, 1]][[0, 1]]Passed
explicit sequence 1[[]][[]]Passed
explicit sequence 2[[0, 1]][[0, 1]]Passed
explicit sequence 3[[0]][[3]]Failed
explicit sequence 4[[1, 2]][[1, 2]]Passed
explicit sequence 5[[0, 2]][[0, 3]]Failed
explicit sequence 6[[0, 1, 2]][[0, 1, 2, 3]]Failed
explicit sequence 7[[]][[]]Passed
explicit sequence 8[[]][[]]Passed
explicit sequence 9[[]][[]]Passed
explicit sequence 10[[0, 1, 2]][[0, 1, 2, 3]]Failed

SHA-256 / 6529c4b14039954d0d4325263d38e6e9d7adafd85af22792fb072effe922d8fe

HELD IN THE MEMBER ARCHIVE

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

This mechanism has 11 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.

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Verification & scope

Finite one-dimensional integer sample sets model coverage state only; no geometric intersection, memory layout, GPU or graphics-standard conformance is claimed. 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 2026-09-29T14:45:19.780828+00:00.

Case digest / 3cbc0df29e82c5b7c21117de9c767c1cd8cd0220ae12bc77b96cbb9fd4d64966