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Seller supply amendment: withdrawal unawarded stock · case 01

Seller withdrawal includes firm reserved auction stock.

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ROOT CAUSE

Seller withdrawal includes firm reserved auction stock.

VERIFIED REPAIR

For withdrawal unawarded stock, apply the stipulated decision {l:max(0,x["old"][l]-x["awarded"].get(l,0)-x["reserved"].get(l,0)) for l in x["withdrawn"]}.

Unsuccessful approach: The attempted repair uses {l:max(0,x["old"][l]-x["awarded"].get(l,0)) for l in x["withdrawn"]}; the explicit regression cases demonstrate that this still violates the stipulated auction rule.

Case contract

An auction seller may amend offered inventory before freeze. Confirmed awards and firm reservations form a floor; rejected amendments retain the previous inventory. Per-lot changes are simultaneous and cannot use removed supply to satisfy prior awards. Named decision withdrawal-unawarded-stock: For withdrawal unawarded stock, apply the stipulated decision {l:max(0,x["old"][l]-x["awarded"].get(l,0)-x["reserved"].get(l,0)) for l in x["withdrawn"]}.

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 = {l:max(q,x["awarded"].get(l,0)) for l,q in x["new"].items()}
    v1 = {l:max(q,x["awarded"].get(l,0)+x["reserved"].get(l,0)) for l,q in x["new"].items()}
    v2 = {l:(min(q,x["old"][l]) if x["frozen"] else q) for l,q in x["new"].items()}
    v3 = x["new"] if x["approved"] else x["old"]
    v4 = {l:x["old"][l] for l in x["withdrawn"]}
    v5 = {l:max(0,q-x["delivered"].get(l,0)) for l,q in x["old"].items()}
    v6 = all(max(0,x["new"][l]-x["old"][l])<=x["certified_additions"].get(l,0) for l in x["added"])
    v7 = [l for l in x["new"] if x["sellers"][l]==x["actor"]]
    v8 = {l:q if l in x["consent"] else x["old"][l] for l,q in x["new"].items()}
    v9 = x["expected"]==x["revision"]
    return {'award-inventory-floor':v0,'reservation-inventory-floor':v1,'freeze-supply-increase':v2,'supply-approval-atomicity':v3,'withdrawal-unawarded-stock':v4,'delivered-stock-accounting':v5,'certified-added-quantity':v6,'seller-amendment-ownership':v7,'consented-supply-change':v8,'inventory-revision-guard':v9}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [('normal contract', {'old': {'A': 8, 'B': 5}, 'new': {'A': 5, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': False, 'approved': False, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 2}, {'A': 4}, {'A': 6}, {'A': 8}, {'A': 10}]), ('amendment approved', {'old': {'A': 8, 'B': 5}, 'new': {'A': 5, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': False, 'approved': True, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 2}, {'A': 4}, {'A': 6}, {'A': 8}, {'A': 10}]), ('supply frozen', {'old': {'A': 8, 'B': 5}, 'new': {'A': 5, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': True, 'approved': False, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 2}, {'A': 4}, {'A': 6}, {'A': 8}, {'A': 10}]), ('below awarded supply', {'old': {'A': 8, 'B': 5}, 'new': {'A': 2, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': False, 'approved': False, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 2}, {'A': 4}, {'A': 6}, {'A': 8}, {'A': 10}]), ('unchanged supply', {'old': {'A': 8, 'B': 5}, 'new': {'A': 8, 'B': 5}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': False, 'approved': False, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 2}, {'A': 4}, {'A': 6}, {'A': 8}, {'A': 10}]), ('all reserves released', {'old': {'A': 8, 'B': 5}, 'new': {'A': 5, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 0, 'B': 0}, 'frozen': False, 'approved': False, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 4}, {'A': 8}, {'A': 12}, {'A': 16}, {'A': 20}]), ('certified increase', {'old': {'A': 8, 'B': 5}, 'new': {'A': 5, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': False, 'approved': False, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 3}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 2}, {'A': 4}, {'A': 6}, {'A': 8}, {'A': 10}]), ('wrong actor', {'old': {'A': 8, 'B': 5}, 'new': {'A': 5, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': False, 'approved': False, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'z', 'revision': 2, 'expected': 2}, [{'A': 2}, {'A': 4}, {'A': 6}, {'A': 8}, {'A': 10}]), ('all withdrawn', {'old': {'A': 8, 'B': 5}, 'new': {'A': 5, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': False, 'approved': False, 'withdrawn': ['A', 'B'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 2, 'B': 2}, {'A': 4, 'B': 4}, {'A': 6, 'B': 6}, {'A': 8, 'B': 8}, {'A': 10, 'B': 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))['withdrawal-unawarded-stock'], 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
normal contract	`{'A': 8}`	`{'A': 2}`	Failed
amendment approved	`{'A': 8}`	`{'A': 2}`	Failed
supply frozen	`{'A': 8}`	`{'A': 2}`	Failed
below awarded supply	`{'A': 8}`	`{'A': 2}`	Failed
unchanged supply	`{'A': 8}`	`{'A': 2}`	Failed
all reserves released	`{'A': 8}`	`{'A': 4}`	Failed
certified increase	`{'A': 8}`	`{'A': 2}`	Failed
wrong actor	`{'A': 8}`	`{'A': 2}`	Failed
all withdrawn	`{'A': 8, 'B': 5}`	`{'A': 2, 'B': 2}`	Failed

SHA-256 / 8b9f4c1def599dc5b47ee8effb05f7b2cda81d0d6391e7621828dc270e386fb8

2 / The unsuccessful fix

Exit 1

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

N = 1
observations = []
def solve(x):
    v0 = {l:max(q,x["awarded"].get(l,0)) for l,q in x["new"].items()}
    v1 = {l:max(q,x["awarded"].get(l,0)+x["reserved"].get(l,0)) for l,q in x["new"].items()}
    v2 = {l:(min(q,x["old"][l]) if x["frozen"] else q) for l,q in x["new"].items()}
    v3 = x["new"] if x["approved"] else x["old"]
    v4 = {l:max(0,x["old"][l]-x["awarded"].get(l,0)) for l in x["withdrawn"]}
    v5 = {l:max(0,q-x["delivered"].get(l,0)) for l,q in x["old"].items()}
    v6 = all(max(0,x["new"][l]-x["old"][l])<=x["certified_additions"].get(l,0) for l in x["added"])
    v7 = [l for l in x["new"] if x["sellers"][l]==x["actor"]]
    v8 = {l:q if l in x["consent"] else x["old"][l] for l,q in x["new"].items()}
    v9 = x["expected"]==x["revision"]
    return {'award-inventory-floor':v0,'reservation-inventory-floor':v1,'freeze-supply-increase':v2,'supply-approval-atomicity':v3,'withdrawal-unawarded-stock':v4,'delivered-stock-accounting':v5,'certified-added-quantity':v6,'seller-amendment-ownership':v7,'consented-supply-change':v8,'inventory-revision-guard':v9}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [('normal contract', {'old': {'A': 8, 'B': 5}, 'new': {'A': 5, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': False, 'approved': False, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 2}, {'A': 4}, {'A': 6}, {'A': 8}, {'A': 10}]), ('amendment approved', {'old': {'A': 8, 'B': 5}, 'new': {'A': 5, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': False, 'approved': True, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 2}, {'A': 4}, {'A': 6}, {'A': 8}, {'A': 10}]), ('supply frozen', {'old': {'A': 8, 'B': 5}, 'new': {'A': 5, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': True, 'approved': False, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 2}, {'A': 4}, {'A': 6}, {'A': 8}, {'A': 10}]), ('below awarded supply', {'old': {'A': 8, 'B': 5}, 'new': {'A': 2, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': False, 'approved': False, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 2}, {'A': 4}, {'A': 6}, {'A': 8}, {'A': 10}]), ('unchanged supply', {'old': {'A': 8, 'B': 5}, 'new': {'A': 8, 'B': 5}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': False, 'approved': False, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 2}, {'A': 4}, {'A': 6}, {'A': 8}, {'A': 10}]), ('all reserves released', {'old': {'A': 8, 'B': 5}, 'new': {'A': 5, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 0, 'B': 0}, 'frozen': False, 'approved': False, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 4}, {'A': 8}, {'A': 12}, {'A': 16}, {'A': 20}]), ('certified increase', {'old': {'A': 8, 'B': 5}, 'new': {'A': 5, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': False, 'approved': False, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 3}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 2}, {'A': 4}, {'A': 6}, {'A': 8}, {'A': 10}]), ('wrong actor', {'old': {'A': 8, 'B': 5}, 'new': {'A': 5, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': False, 'approved': False, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'z', 'revision': 2, 'expected': 2}, [{'A': 2}, {'A': 4}, {'A': 6}, {'A': 8}, {'A': 10}]), ('all withdrawn', {'old': {'A': 8, 'B': 5}, 'new': {'A': 5, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': False, 'approved': False, 'withdrawn': ['A', 'B'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 2, 'B': 2}, {'A': 4, 'B': 4}, {'A': 6, 'B': 6}, {'A': 8, 'B': 8}, {'A': 10, 'B': 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))['withdrawal-unawarded-stock'], 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
normal contract	`{'A': 4}`	`{'A': 2}`	Failed
amendment approved	`{'A': 4}`	`{'A': 2}`	Failed
supply frozen	`{'A': 4}`	`{'A': 2}`	Failed
below awarded supply	`{'A': 4}`	`{'A': 2}`	Failed
unchanged supply	`{'A': 4}`	`{'A': 2}`	Failed
all reserves released	`{'A': 4}`	`{'A': 4}`	Passed
certified increase	`{'A': 4}`	`{'A': 2}`	Failed
wrong actor	`{'A': 4}`	`{'A': 2}`	Failed
all withdrawn	`{'A': 4, 'B': 3}`	`{'A': 2, 'B': 2}`	Failed

SHA-256 / 9a82bf46e7ed5f8edabbbd398b1e4cd895f0de8327f57c209791be6cafc932e5

3 / The verified repair

Exit 0

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

N = 1
observations = []
def solve(x):
    v0 = {l:max(q,x["awarded"].get(l,0)) for l,q in x["new"].items()}
    v1 = {l:max(q,x["awarded"].get(l,0)+x["reserved"].get(l,0)) for l,q in x["new"].items()}
    v2 = {l:(min(q,x["old"][l]) if x["frozen"] else q) for l,q in x["new"].items()}
    v3 = x["new"] if x["approved"] else x["old"]
    v4 = {l:max(0,x["old"][l]-x["awarded"].get(l,0)-x["reserved"].get(l,0)) for l in x["withdrawn"]}
    v5 = {l:max(0,q-x["delivered"].get(l,0)) for l,q in x["old"].items()}
    v6 = all(max(0,x["new"][l]-x["old"][l])<=x["certified_additions"].get(l,0) for l in x["added"])
    v7 = [l for l in x["new"] if x["sellers"][l]==x["actor"]]
    v8 = {l:q if l in x["consent"] else x["old"][l] for l,q in x["new"].items()}
    v9 = x["expected"]==x["revision"]
    return {'award-inventory-floor':v0,'reservation-inventory-floor':v1,'freeze-supply-increase':v2,'supply-approval-atomicity':v3,'withdrawal-unawarded-stock':v4,'delivered-stock-accounting':v5,'certified-added-quantity':v6,'seller-amendment-ownership':v7,'consented-supply-change':v8,'inventory-revision-guard':v9}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [('normal contract', {'old': {'A': 8, 'B': 5}, 'new': {'A': 5, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': False, 'approved': False, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 2}, {'A': 4}, {'A': 6}, {'A': 8}, {'A': 10}]), ('amendment approved', {'old': {'A': 8, 'B': 5}, 'new': {'A': 5, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': False, 'approved': True, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 2}, {'A': 4}, {'A': 6}, {'A': 8}, {'A': 10}]), ('supply frozen', {'old': {'A': 8, 'B': 5}, 'new': {'A': 5, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': True, 'approved': False, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 2}, {'A': 4}, {'A': 6}, {'A': 8}, {'A': 10}]), ('below awarded supply', {'old': {'A': 8, 'B': 5}, 'new': {'A': 2, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': False, 'approved': False, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 2}, {'A': 4}, {'A': 6}, {'A': 8}, {'A': 10}]), ('unchanged supply', {'old': {'A': 8, 'B': 5}, 'new': {'A': 8, 'B': 5}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': False, 'approved': False, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 2}, {'A': 4}, {'A': 6}, {'A': 8}, {'A': 10}]), ('all reserves released', {'old': {'A': 8, 'B': 5}, 'new': {'A': 5, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 0, 'B': 0}, 'frozen': False, 'approved': False, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 4}, {'A': 8}, {'A': 12}, {'A': 16}, {'A': 20}]), ('certified increase', {'old': {'A': 8, 'B': 5}, 'new': {'A': 5, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': False, 'approved': False, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 3}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 2}, {'A': 4}, {'A': 6}, {'A': 8}, {'A': 10}]), ('wrong actor', {'old': {'A': 8, 'B': 5}, 'new': {'A': 5, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': False, 'approved': False, 'withdrawn': ['A'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'z', 'revision': 2, 'expected': 2}, [{'A': 2}, {'A': 4}, {'A': 6}, {'A': 8}, {'A': 10}]), ('all withdrawn', {'old': {'A': 8, 'B': 5}, 'new': {'A': 5, 'B': 7}, 'awarded': {'A': 4, 'B': 2}, 'reserved': {'A': 2, 'B': 1}, 'frozen': False, 'approved': False, 'withdrawn': ['A', 'B'], 'delivered': {'A': 1, 'B': 0}, 'added': ['B'], 'certified_additions': {'B': 1}, 'consent': ['A'], 'sellers': {'A': 'x', 'B': 'y'}, 'actor': 'x', 'revision': 2, 'expected': 2}, [{'A': 2, 'B': 2}, {'A': 4, 'B': 4}, {'A': 6, 'B': 6}, {'A': 8, 'B': 8}, {'A': 10, 'B': 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))['withdrawal-unawarded-stock'], 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
normal contract	`{'A': 2}`	`{'A': 2}`	Passed
amendment approved	`{'A': 2}`	`{'A': 2}`	Passed
supply frozen	`{'A': 2}`	`{'A': 2}`	Passed
below awarded supply	`{'A': 2}`	`{'A': 2}`	Passed
unchanged supply	`{'A': 2}`	`{'A': 2}`	Passed
all reserves released	`{'A': 4}`	`{'A': 4}`	Passed
certified increase	`{'A': 2}`	`{'A': 2}`	Passed
wrong actor	`{'A': 2}`	`{'A': 2}`	Passed
all withdrawn	`{'A': 2, 'B': 2}`	`{'A': 2, 'B': 2}`	Passed

SHA-256 / 6006a7d7032a20c26c379cb7012224ad4ffb979206adab658c67ccdc4565a181

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 2026-09-29T14:46:19.159848+00:00.

Case digest / 8fc8b0d357750b54fa2bca92b760fe91a1db2ff2c2b474b85656b546a01ed3e1