FAILURE MAP
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FA-18826 / Time representation / Open access

Certificate lifetime goes negative or is measured at converted event · case 01

The decoded time state disagrees with the explicit regression oracle for remaining.

Verified by executionVariant 1 · 13 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

Certificate lifetime goes negative or is measured at converted event.

THE FAILURE

Certificate lifetime goes negative or is measured at converted event.

Unsuccessful approach: The partial correction still substitutes max(0,r['expires'] - r['query']) at the same fault site.

Case contract

A timescale offset certificate declares coverage [start,end), publication instant, expiry instant, version and source identity. A query may use offset only inside coverage with a currently valid certificate and minimum accepted version. Query time and validation wall time are independent. Return status precedence identity/version/publication/expiry/coverage, admitted shifted coordinate, remaining validity and coverage margin.

Why this case matters

Clock transfer and timestamp consumers require preserved coordinate, phase, validity and elapsed-time semantics.

1 / The failure

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json
from fractions import Fraction
N = 1
observations = []
def solve(r):
    identity = r['source'] == r['trusted_source']
    version = r['version'] >= r['minimum_version']
    published = r['now'] >= r['published']
    live = r['now'] < r['expires']
    covered = r['start'] <= r['query'] < r['end']
    status = 'identity' if not identity else ('version' if not version else ('future' if not published else ('expired' if not live else ('uncovered' if not covered else 'ok'))))
    shifted = r['query'] + r['offset'] if status == 'ok' else None
    remaining = r['expires'] - r['now']
    left_margin = r['query'] - r['start']
    right_margin = r['end'] - r['query']
    return [status,shifted,remaining,[left_margin,right_margin] if covered else None]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('fixture 1', solve({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 10, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 100, 'offset': 7}), ['ok', 107, 10, [0, 100]])
check('fixture 2', solve({'source': 'clock', 'trusted_source': 'clock', 'version': 3, 'minimum_version': 2, 'now': 15, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 150, 'offset': 7}), ['ok', 157, 5, [50, 50]])
check('fixture 3', solve({'source': 'clock', 'trusted_source': 'clock', 'version': 1, 'minimum_version': 2, 'now': 15, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 150, 'offset': 7}), ['version', None, 5, [50, 50]])
check('fixture 4', solve({'source': 'clock2', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 15, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 150, 'offset': 7}), ['identity', None, 5, [50, 50]])
check('fixture 5', solve({'source': 'other', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 15, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 150, 'offset': 7}), ['identity', None, 5, [50, 50]])
check('fixture 6', solve({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 9, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 150, 'offset': 7}), ['future', None, 11, [50, 50]])
check('fixture 7', solve({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 20, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 150, 'offset': 7}), ['expired', None, 0, [50, 50]])
check('fixture 8', solve({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 21, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 150, 'offset': 7}), ['expired', None, 0, [50, 50]])
check('fixture 9', solve({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 15, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 200, 'offset': 7}), ['uncovered', None, 5, None])
check('fixture 10', solve({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 15, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 99, 'offset': 7}), ['uncovered', None, 5, None])
check('fixture 11', solve({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 15, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 199, 'offset': 7}), ['ok', 206, 5, [99, 1]])
check('fixture 12', solve({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 15, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 100, 'offset': 7}), ['ok', 107, 5, [0, 100]])
variant = [({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 10, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 101, 'offset': 7}, ['ok', 108, 10, [1, 99]]), ({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 10, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 102, 'offset': 7}, ['ok', 109, 10, [2, 98]]), ({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 10, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 103, 'offset': 7}, ['ok', 110, 10, [3, 97]]), ({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 10, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 104, 'offset': 7}, ['ok', 111, 10, [4, 96]]), ({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 10, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 105, 'offset': 7}, ['ok', 112, 10, [5, 95]])]
check("variant capture", solve(variant[N-1][0]), variant[N-1][1])
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
fixture 1['ok', 107, 10, [0, 100]]['ok', 107, 10, [0, 100]]Passed
fixture 2['ok', 157, 5, [50, 50]]['ok', 157, 5, [50, 50]]Passed
fixture 3['version', None, 5, [50, 50]]['version', None, 5, [50, 50]]Passed
fixture 4['identity', None, 5, [50, 50]]['identity', None, 5, [50, 50]]Passed
fixture 5['identity', None, 5, [50, 50]]['identity', None, 5, [50, 50]]Passed
fixture 6['future', None, 11, [50, 50]]['future', None, 11, [50, 50]]Passed
fixture 7['expired', None, 0, [50, 50]]['expired', None, 0, [50, 50]]Passed
fixture 8['expired', None, -1, [50, 50]]['expired', None, 0, [50, 50]]Failed
fixture 9['uncovered', None, 5, None]['uncovered', None, 5, None]Passed
fixture 10['uncovered', None, 5, None]['uncovered', None, 5, None]Passed
fixture 11['ok', 206, 5, [99, 1]]['ok', 206, 5, [99, 1]]Passed
fixture 12['ok', 107, 5, [0, 100]]['ok', 107, 5, [0, 100]]Passed
variant capture['ok', 108, 10, [1, 99]]['ok', 108, 10, [1, 99]]Passed

SHA-256 / b8bd0ba671b19f63e36099dda76e05b0727df213dcd8045dd8fa8300ebc763ee

2 / The unsuccessful fix

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json
from fractions import Fraction
N = 1
observations = []
def solve(r):
    identity = r['source'] == r['trusted_source']
    version = r['version'] >= r['minimum_version']
    published = r['now'] >= r['published']
    live = r['now'] < r['expires']
    covered = r['start'] <= r['query'] < r['end']
    status = 'identity' if not identity else ('version' if not version else ('future' if not published else ('expired' if not live else ('uncovered' if not covered else 'ok'))))
    shifted = r['query'] + r['offset'] if status == 'ok' else None
    remaining = max(0,r['expires'] - r['query'])
    left_margin = r['query'] - r['start']
    right_margin = r['end'] - r['query']
    return [status,shifted,remaining,[left_margin,right_margin] if covered else None]
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
check('fixture 1', solve({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 10, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 100, 'offset': 7}), ['ok', 107, 10, [0, 100]])
check('fixture 2', solve({'source': 'clock', 'trusted_source': 'clock', 'version': 3, 'minimum_version': 2, 'now': 15, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 150, 'offset': 7}), ['ok', 157, 5, [50, 50]])
check('fixture 3', solve({'source': 'clock', 'trusted_source': 'clock', 'version': 1, 'minimum_version': 2, 'now': 15, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 150, 'offset': 7}), ['version', None, 5, [50, 50]])
check('fixture 4', solve({'source': 'clock2', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 15, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 150, 'offset': 7}), ['identity', None, 5, [50, 50]])
check('fixture 5', solve({'source': 'other', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 15, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 150, 'offset': 7}), ['identity', None, 5, [50, 50]])
check('fixture 6', solve({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 9, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 150, 'offset': 7}), ['future', None, 11, [50, 50]])
check('fixture 7', solve({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 20, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 150, 'offset': 7}), ['expired', None, 0, [50, 50]])
check('fixture 8', solve({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 21, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 150, 'offset': 7}), ['expired', None, 0, [50, 50]])
check('fixture 9', solve({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 15, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 200, 'offset': 7}), ['uncovered', None, 5, None])
check('fixture 10', solve({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 15, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 99, 'offset': 7}), ['uncovered', None, 5, None])
check('fixture 11', solve({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 15, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 199, 'offset': 7}), ['ok', 206, 5, [99, 1]])
check('fixture 12', solve({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 15, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 100, 'offset': 7}), ['ok', 107, 5, [0, 100]])
variant = [({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 10, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 101, 'offset': 7}, ['ok', 108, 10, [1, 99]]), ({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 10, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 102, 'offset': 7}, ['ok', 109, 10, [2, 98]]), ({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 10, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 103, 'offset': 7}, ['ok', 110, 10, [3, 97]]), ({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 10, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 104, 'offset': 7}, ['ok', 111, 10, [4, 96]]), ({'source': 'clock', 'trusted_source': 'clock', 'version': 2, 'minimum_version': 2, 'now': 10, 'published': 10, 'expires': 20, 'start': 100, 'end': 200, 'query': 105, 'offset': 7}, ['ok', 112, 10, [5, 95]])]
check("variant capture", solve(variant[N-1][0]), variant[N-1][1])
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
fixture 1['ok', 107, 0, [0, 100]]['ok', 107, 10, [0, 100]]Failed
fixture 2['ok', 157, 0, [50, 50]]['ok', 157, 5, [50, 50]]Failed
fixture 3['version', None, 0, [50, 50]]['version', None, 5, [50, 50]]Failed
fixture 4['identity', None, 0, [50, 50]]['identity', None, 5, [50, 50]]Failed
fixture 5['identity', None, 0, [50, 50]]['identity', None, 5, [50, 50]]Failed
fixture 6['future', None, 0, [50, 50]]['future', None, 11, [50, 50]]Failed
fixture 7['expired', None, 0, [50, 50]]['expired', None, 0, [50, 50]]Passed
fixture 8['expired', None, 0, [50, 50]]['expired', None, 0, [50, 50]]Passed
fixture 9['uncovered', None, 0, None]['uncovered', None, 5, None]Failed
fixture 10['uncovered', None, 0, None]['uncovered', None, 5, None]Failed
fixture 11['ok', 206, 0, [99, 1]]['ok', 206, 5, [99, 1]]Failed
fixture 12['ok', 107, 0, [0, 100]]['ok', 107, 5, [0, 100]]Failed
variant capture['ok', 108, 0, [1, 99]]['ok', 108, 10, [1, 99]]Failed

SHA-256 / f29359c5cdee84ace070b5675ab72a54d79878333e719db8e324ca4aa7b8a261

HELD IN THE MEMBER ARCHIVE

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

This mechanism has 13 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.

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Verification & scope

Deterministic integer reference model with stipulated units and policies; not a complete clock, wire standard or platform implementation. 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 2026-09-29T14:40:01.667778+00:00.

Case digest / 6c9dbdb876a1d2f2c91373ff0885fd3e57765a9914440c8aee582348420b7ff2