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FA-57026 / Auction allocation rules / Open access

Performance bond: guarantee lot coverage · case 01

Bond claims include lots outside the guaranteed award schedule.

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

ROOT CAUSE

Bond claims include lots outside the guaranteed award schedule.

VERIFIED REPAIR

For guarantee lot coverage, apply the stipulated decision set(x["claim_lots"])<=set(x["guaranteed"]).

Unsuccessful approach: The attempted repair uses bool(set(x["claim_lots"])&set(x["guaranteed"])); the explicit regression cases demonstrate that this still violates the stipulated auction rule.

Case contract

A toy winning-bid bond secures post-award performance separately from payment. Bond tranches mature on distinct milestones; surety substitutions require explicit approval; partial calls consume the remaining callable face amount. Bond identifiers are unique strings. Named decision guarantee-lot-coverage: For guarantee lot coverage, apply the stipulated decision set(x["claim_lots"])<=set(x["guaranteed"]).

Why this case matters

Offline administrative auction model for software failure analysis.

1 / The failure

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

N = 1
observations = []
def solve(x):
    v0 = max(0,x["face"]-x["called"])
    v1 = min(x["request"],max(0,x["face"]-x["called"]))
    v2 = 0 if x["expired"] else min(x["request"],max(0,x["face"]-x["called"]))
    v3 = x["retention"] if x["completion"] else x["face"]
    v4 = sum(q for m,q in zip(x["milestones"],x["tranches"]) if m in x["done"])
    v5 = x["proposed"] if x["proposed"] in x["approved"] else x["surety"]
    v6 = x["replaced"] and x["proposed"] in x["approved"]
    v7 = True
    v8 = x["claimant"]==x["beneficiary"] and not x["expired"]
    v9 = [i for i,t in x["presented_claims"] if t<=x["claim_deadline"]]
    return {'callable-face':v0,'claim-call-cap':v1,'expiry-call-block':v2,'retention-after-completion':v3,'milestone-tranche-release':v4,'surety-substitution-approval':v5,'old-bond-discharge':v6,'guarantee-lot-coverage':v7,'beneficiary-claim-authority':v8,'timely-claim-survives-expiry':v9}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [('partly guaranteed claim', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L1', 'L3'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [False, False, False, False, False]), ('unguaranteed lot', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L3'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [False, False, False, False, False]), ('partly guaranteed claim / claim too large', {'face': 30, 'called': 8, 'request': 40, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L1', 'L3'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [False, False, False, False, False]), ('normal contract', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True]), ('claim too large', {'face': 30, 'called': 8, 'request': 40, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True]), ('bond exhausted', {'face': 30, 'called': 30, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True]), ('expired', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': True, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True]), ('completion', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': True, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True]), ('all milestones', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship', 'inspect'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True]), ('substitution approved', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1', 's2'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True]), ('substitution finalized', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': True, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True])]
def vary(value):
 if type(value) is int: return value*N
 if isinstance(value,list): return [vary(v) for v in value]
 if isinstance(value,dict): return {k:(v if k in ['count', 'delivery_index', 'disputed', 'maximum_set', 'minimum_set', 'stage', 'threshold', 'waived'] else vary(v)) for k,v in value.items()}
 return value
for label, request, expected in fixtures:
 check(label, solve(vary(request))['guarantee-lot-coverage'], expected[N-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
partly guaranteed claimTrueFalseFailed
unguaranteed lotTrueFalseFailed
partly guaranteed claim / claim too largeTrueFalseFailed
normal contractTrueTruePassed
claim too largeTrueTruePassed
bond exhaustedTrueTruePassed
expiredTrueTruePassed
completionTrueTruePassed
all milestonesTrueTruePassed
substitution approvedTrueTruePassed
substitution finalizedTrueTruePassed

SHA-256 / 5df46f510f6458b614779fc481d41a272e56f2a7539e5b0c793038229e33b2a9

2 / The unsuccessful fix

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

N = 1
observations = []
def solve(x):
    v0 = max(0,x["face"]-x["called"])
    v1 = min(x["request"],max(0,x["face"]-x["called"]))
    v2 = 0 if x["expired"] else min(x["request"],max(0,x["face"]-x["called"]))
    v3 = x["retention"] if x["completion"] else x["face"]
    v4 = sum(q for m,q in zip(x["milestones"],x["tranches"]) if m in x["done"])
    v5 = x["proposed"] if x["proposed"] in x["approved"] else x["surety"]
    v6 = x["replaced"] and x["proposed"] in x["approved"]
    v7 = bool(set(x["claim_lots"])&set(x["guaranteed"]))
    v8 = x["claimant"]==x["beneficiary"] and not x["expired"]
    v9 = [i for i,t in x["presented_claims"] if t<=x["claim_deadline"]]
    return {'callable-face':v0,'claim-call-cap':v1,'expiry-call-block':v2,'retention-after-completion':v3,'milestone-tranche-release':v4,'surety-substitution-approval':v5,'old-bond-discharge':v6,'guarantee-lot-coverage':v7,'beneficiary-claim-authority':v8,'timely-claim-survives-expiry':v9}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [('partly guaranteed claim', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L1', 'L3'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [False, False, False, False, False]), ('unguaranteed lot', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L3'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [False, False, False, False, False]), ('partly guaranteed claim / claim too large', {'face': 30, 'called': 8, 'request': 40, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L1', 'L3'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [False, False, False, False, False]), ('normal contract', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True]), ('claim too large', {'face': 30, 'called': 8, 'request': 40, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True]), ('bond exhausted', {'face': 30, 'called': 30, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True]), ('expired', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': True, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True]), ('completion', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': True, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True]), ('all milestones', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship', 'inspect'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True]), ('substitution approved', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1', 's2'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True]), ('substitution finalized', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': True, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True])]
def vary(value):
 if type(value) is int: return value*N
 if isinstance(value,list): return [vary(v) for v in value]
 if isinstance(value,dict): return {k:(v if k in ['count', 'delivery_index', 'disputed', 'maximum_set', 'minimum_set', 'stage', 'threshold', 'waived'] else vary(v)) for k,v in value.items()}
 return value
for label, request, expected in fixtures:
 check(label, solve(vary(request))['guarantee-lot-coverage'], expected[N-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
partly guaranteed claimTrueFalseFailed
unguaranteed lotFalseFalsePassed
partly guaranteed claim / claim too largeTrueFalseFailed
normal contractTrueTruePassed
claim too largeTrueTruePassed
bond exhaustedTrueTruePassed
expiredTrueTruePassed
completionTrueTruePassed
all milestonesTrueTruePassed
substitution approvedTrueTruePassed
substitution finalizedTrueTruePassed

SHA-256 / 1422ac28fcb5bedb80529ddeeca333908e460e68c408a9286a50153447c17dea

3 / The verified repair

Exit 0
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(x):
    v0 = max(0,x["face"]-x["called"])
    v1 = min(x["request"],max(0,x["face"]-x["called"]))
    v2 = 0 if x["expired"] else min(x["request"],max(0,x["face"]-x["called"]))
    v3 = x["retention"] if x["completion"] else x["face"]
    v4 = sum(q for m,q in zip(x["milestones"],x["tranches"]) if m in x["done"])
    v5 = x["proposed"] if x["proposed"] in x["approved"] else x["surety"]
    v6 = x["replaced"] and x["proposed"] in x["approved"]
    v7 = set(x["claim_lots"])<=set(x["guaranteed"])
    v8 = x["claimant"]==x["beneficiary"] and not x["expired"]
    v9 = [i for i,t in x["presented_claims"] if t<=x["claim_deadline"]]
    return {'callable-face':v0,'claim-call-cap':v1,'expiry-call-block':v2,'retention-after-completion':v3,'milestone-tranche-release':v4,'surety-substitution-approval':v5,'old-bond-discharge':v6,'guarantee-lot-coverage':v7,'beneficiary-claim-authority':v8,'timely-claim-survives-expiry':v9}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [('partly guaranteed claim', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L1', 'L3'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [False, False, False, False, False]), ('unguaranteed lot', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L3'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [False, False, False, False, False]), ('partly guaranteed claim / claim too large', {'face': 30, 'called': 8, 'request': 40, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L1', 'L3'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [False, False, False, False, False]), ('normal contract', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True]), ('claim too large', {'face': 30, 'called': 8, 'request': 40, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True]), ('bond exhausted', {'face': 30, 'called': 30, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True]), ('expired', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': True, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True]), ('completion', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': True, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True]), ('all milestones', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship', 'inspect'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True]), ('substitution approved', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1', 's2'], 'replaced': False, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True]), ('substitution finalized', {'face': 30, 'called': 8, 'request': 10, 'paid_claims': 5, 'expired': False, 'completion': False, 'retention': 4, 'milestones': ['ship', 'inspect'], 'done': ['ship'], 'tranches': [12, 18], 'surety': 's1', 'proposed': 's2', 'approved': ['s1'], 'replaced': True, 'guaranteed': ['L1', 'L2'], 'claim_lots': ['L2'], 'returned': 3, 'beneficiary': 'seller', 'claimant': 'seller', 'claim_ids': ['c1', 'c2', 'c1'], 'presented_claims': [['c1', 3], ['c2', 7]], 'claim_deadline': 5}, [True, True, True, True, True])]
def vary(value):
 if type(value) is int: return value*N
 if isinstance(value,list): return [vary(v) for v in value]
 if isinstance(value,dict): return {k:(v if k in ['count', 'delivery_index', 'disputed', 'maximum_set', 'minimum_set', 'stage', 'threshold', 'waived'] else vary(v)) for k,v in value.items()}
 return value
for label, request, expected in fixtures:
 check(label, solve(vary(request))['guarantee-lot-coverage'], expected[N-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
partly guaranteed claimFalseFalsePassed
unguaranteed lotFalseFalsePassed
partly guaranteed claim / claim too largeFalseFalsePassed
normal contractTrueTruePassed
claim too largeTrueTruePassed
bond exhaustedTrueTruePassed
expiredTrueTruePassed
completionTrueTruePassed
all milestonesTrueTruePassed
substitution approvedTrueTruePassed
substitution finalizedTrueTruePassed

SHA-256 / 0f762d6e70308ca9c7bd66ef02adee187f5a11fd7c43de7dc08b8703f0089317

Verification & scope

Stipulated toy auction rules, not a venue specification, financial advice, optimization claim, or live trading implementation. Nonnegative integer inputs and internally aligned list fields only. 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 2026-09-29T14:46:12.827703+00:00.

Case digest / 225511057ac1ddcc83f4f87ee5600adc39e66a7abcddcf275badf7d7a8a006db