FA-56556 / Auction allocation rules / Open access

Activity eligibility: waiver consumption · case 01

Waiver accounting can go negative or fail to consume a used waiver.

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ROOT CAUSE

Waiver accounting can go negative or fail to consume a used waiver.

VERIFIED REPAIR

Consume one available waiver exactly when used.

Unsuccessful approach: The attempted repair uses x["waivers"]; the explicit regression cases demonstrate that this still violates the stipulated auction rule.

Case contract

A stipulated ascending multiround auction records eligibility in activity points. Submitted lots contribute fixed points, withdrawn lots contribute none, a waiver preserves previous eligibility once, and frozen eligibility cannot grow. These rules are pedagogical and independent of real spectrum-auction regulations. Named decision waiver-consumption: Consume one available waiver exactly when used.

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    v0 = sum(x["points"][i] for i in set(x["active"])-set(x["withdrawn"]))
    v1 = sum(x["points"][i] for i in set(x["active"])|set(x["standing"]))
    v2 = x["use_waiver"] and x["waivers"]>0
    v3 = x["waivers"]-int(x["use_waiver"])
    v4 = min(x["previous"],sum(x["points"][i] for i in x["active"]))
    v5 = x["previous"] if x["use_waiver"] and x["waivers"]>0 else min(x["previous"],x["required"])
    v6 = x["history"] if x["round"]<=x["last_round"] else x["history"]+[x["previous"]]
    v7 = min(x["previous"],x["stage_limits"][min(x["stage"],len(x["stage_limits"])-1)])
    v8 = min(x["qualification"],x["previous"]+x["transferred"])
    v9 = 0 if x["revoked"] else min(x["previous"],x["qualification"])
    return {'withdrawn-activity':v0,'standing-credit-dedup':v1,'waiver-availability':v2,'waiver-consumption':v3,'eligibility-monotonicity':v4,'waiver-preservation':v5,'round-advance':v6,'stage-ceiling':v7,'transfer-cap':v8,'revocation':v9}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [('no waiver left', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 0, 'use_waiver': True, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [0, 0, 0, 0, 0]), ('waiver round / no waiver left', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 0, 'use_waiver': True, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [0, 0, 0, 0, 0]), ('waiver round', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': True, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [1, 3, 5, 7, 9]), ('waiver round / all withdrawn', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['A', 'B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': True, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [1, 3, 5, 7, 9]), ('normal contract', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': False, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [2, 4, 6, 8, 10]), ('all withdrawn', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['A', 'B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': False, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [2, 4, 6, 8, 10]), ('standing overlaps activity', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['A'], 'previous': 8, 'waivers': 2, 'use_waiver': False, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [2, 4, 6, 8, 10]), ('replayed round', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': False, 'required': 5, 'round': 1, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [2, 4, 6, 8, 10]), ('stage entry', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': False, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 0, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [2, 4, 6, 8, 10]), ('small qualification', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': False, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 2, 'transferred': 2, 'revoked': False}, [2, 4, 6, 8, 10]), ('qualification revoked', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': False, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': True}, [2, 4, 6, 8, 10])]
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))['waiver-consumption'], 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 fixture	Actual	Expected	Outcome
no waiver left	`-1`	`0`	Failed
waiver round / no waiver left	`-1`	`0`	Failed
waiver round	`1`	`1`	Passed
waiver round / all withdrawn	`1`	`1`	Passed
normal contract	`2`	`2`	Passed
all withdrawn	`2`	`2`	Passed
standing overlaps activity	`2`	`2`	Passed
replayed round	`2`	`2`	Passed
stage entry	`2`	`2`	Passed
small qualification	`2`	`2`	Passed
qualification revoked	`2`	`2`	Passed

SHA-256 / 2ca128c1cc63b525c87d1bb771cceadeb0a194a60e3618209ec13298c5ecbcb8

2 / The unsuccessful fix

Exit 1

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

N = 1
observations = []
def solve(x):
    v0 = sum(x["points"][i] for i in set(x["active"])-set(x["withdrawn"]))
    v1 = sum(x["points"][i] for i in set(x["active"])|set(x["standing"]))
    v2 = x["use_waiver"] and x["waivers"]>0
    v3 = x["waivers"]
    v4 = min(x["previous"],sum(x["points"][i] for i in x["active"]))
    v5 = x["previous"] if x["use_waiver"] and x["waivers"]>0 else min(x["previous"],x["required"])
    v6 = x["history"] if x["round"]<=x["last_round"] else x["history"]+[x["previous"]]
    v7 = min(x["previous"],x["stage_limits"][min(x["stage"],len(x["stage_limits"])-1)])
    v8 = min(x["qualification"],x["previous"]+x["transferred"])
    v9 = 0 if x["revoked"] else min(x["previous"],x["qualification"])
    return {'withdrawn-activity':v0,'standing-credit-dedup':v1,'waiver-availability':v2,'waiver-consumption':v3,'eligibility-monotonicity':v4,'waiver-preservation':v5,'round-advance':v6,'stage-ceiling':v7,'transfer-cap':v8,'revocation':v9}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [('no waiver left', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 0, 'use_waiver': True, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [0, 0, 0, 0, 0]), ('waiver round / no waiver left', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 0, 'use_waiver': True, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [0, 0, 0, 0, 0]), ('waiver round', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': True, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [1, 3, 5, 7, 9]), ('waiver round / all withdrawn', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['A', 'B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': True, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [1, 3, 5, 7, 9]), ('normal contract', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': False, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [2, 4, 6, 8, 10]), ('all withdrawn', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['A', 'B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': False, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [2, 4, 6, 8, 10]), ('standing overlaps activity', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['A'], 'previous': 8, 'waivers': 2, 'use_waiver': False, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [2, 4, 6, 8, 10]), ('replayed round', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': False, 'required': 5, 'round': 1, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [2, 4, 6, 8, 10]), ('stage entry', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': False, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 0, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [2, 4, 6, 8, 10]), ('small qualification', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': False, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 2, 'transferred': 2, 'revoked': False}, [2, 4, 6, 8, 10]), ('qualification revoked', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': False, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': True}, [2, 4, 6, 8, 10])]
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))['waiver-consumption'], 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 fixture	Actual	Expected	Outcome
no waiver left	`0`	`0`	Passed
waiver round / no waiver left	`0`	`0`	Passed
waiver round	`2`	`1`	Failed
waiver round / all withdrawn	`2`	`1`	Failed
normal contract	`2`	`2`	Passed
all withdrawn	`2`	`2`	Passed
standing overlaps activity	`2`	`2`	Passed
replayed round	`2`	`2`	Passed
stage entry	`2`	`2`	Passed
small qualification	`2`	`2`	Passed
qualification revoked	`2`	`2`	Passed

SHA-256 / f370af005a14a7a1843e1cb1dde0645040969d4622699eead51d1a26fa6e3c0e

3 / The verified repair

Exit 0

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

N = 1
observations = []
def solve(x):
    v0 = sum(x["points"][i] for i in set(x["active"])-set(x["withdrawn"]))
    v1 = sum(x["points"][i] for i in set(x["active"])|set(x["standing"]))
    v2 = x["use_waiver"] and x["waivers"]>0
    v3 = x["waivers"]-int(x["use_waiver"] and x["waivers"]>0)
    v4 = min(x["previous"],sum(x["points"][i] for i in x["active"]))
    v5 = x["previous"] if x["use_waiver"] and x["waivers"]>0 else min(x["previous"],x["required"])
    v6 = x["history"] if x["round"]<=x["last_round"] else x["history"]+[x["previous"]]
    v7 = min(x["previous"],x["stage_limits"][min(x["stage"],len(x["stage_limits"])-1)])
    v8 = min(x["qualification"],x["previous"]+x["transferred"])
    v9 = 0 if x["revoked"] else min(x["previous"],x["qualification"])
    return {'withdrawn-activity':v0,'standing-credit-dedup':v1,'waiver-availability':v2,'waiver-consumption':v3,'eligibility-monotonicity':v4,'waiver-preservation':v5,'round-advance':v6,'stage-ceiling':v7,'transfer-cap':v8,'revocation':v9}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [('no waiver left', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 0, 'use_waiver': True, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [0, 0, 0, 0, 0]), ('waiver round / no waiver left', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 0, 'use_waiver': True, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [0, 0, 0, 0, 0]), ('waiver round', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': True, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [1, 3, 5, 7, 9]), ('waiver round / all withdrawn', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['A', 'B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': True, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [1, 3, 5, 7, 9]), ('normal contract', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': False, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [2, 4, 6, 8, 10]), ('all withdrawn', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['A', 'B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': False, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [2, 4, 6, 8, 10]), ('standing overlaps activity', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['A'], 'previous': 8, 'waivers': 2, 'use_waiver': False, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [2, 4, 6, 8, 10]), ('replayed round', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': False, 'required': 5, 'round': 1, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [2, 4, 6, 8, 10]), ('stage entry', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': False, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 0, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': False}, [2, 4, 6, 8, 10]), ('small qualification', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': False, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 2, 'transferred': 2, 'revoked': False}, [2, 4, 6, 8, 10]), ('qualification revoked', {'points': {'A': 3, 'B': 2, 'C': 1}, 'active': ['A', 'B'], 'withdrawn': ['B'], 'standing': ['C'], 'previous': 8, 'waivers': 2, 'use_waiver': False, 'required': 5, 'round': 2, 'last_round': 1, 'history': [8, 6, 5], 'stage': 2, 'stage_limits': [10, 7, 4], 'qualification': 9, 'transferred': 2, 'revoked': True}, [2, 4, 6, 8, 10])]
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))['waiver-consumption'], 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 fixture	Actual	Expected	Outcome
no waiver left	`0`	`0`	Passed
waiver round / no waiver left	`0`	`0`	Passed
waiver round	`1`	`1`	Passed
waiver round / all withdrawn	`1`	`1`	Passed
normal contract	`2`	`2`	Passed
all withdrawn	`2`	`2`	Passed
standing overlaps activity	`2`	`2`	Passed
replayed round	`2`	`2`	Passed
stage entry	`2`	`2`	Passed
small qualification	`2`	`2`	Passed
qualification revoked	`2`	`2`	Passed

SHA-256 / 51fa939637d931d8c8b6dd37717f3e0c15fb602b1b01f7f2188677432ac00237

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 2026-09-29T14:46:08.241651+00:00.

Case digest / ee06241f8f3b1bdd65b55c3d1434ada85d1d297a1ec8a5a39339f61f73e4424f