FA-56601 / Auction allocation rules / Open access
Clock demand: posted price lock · case 01
Rejected clock proposals overwrite the bidder binding price.
ROOT CAUSE
Rejected clock proposals overwrite the bidder binding price.
VERIFIED REPAIR
Change a binding price only where that posted proposal was accepted.
Unsuccessful approach: The attempted repair uses x["previous_prices"]; the explicit regression cases demonstrate that this still violates the stipulated auction rule.
Case contract
One bounded clock-auction round maintains per-lot demand at posted prices. Demand reductions become binding only at accepted clock prices; exits cannot be undone; deferred reductions are reconsidered against the new price. Arrays are aligned by lot and values are nonnegative integers. Named decision posted-price-lock: Change a binding price only where that posted proposal was accepted.
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 = [min(o,r) if a else o for o,r,a in zip(x["old"],x["requested"],x["accepted"])]
v1 = [0 if e else q for e,q in zip(x["exited"],x["requested"])]
v2 = x["prices"]
v3 = [min(q,c) for q,c in zip(x["requested"],x["caps"])]
v4 = [max(0,q-s) for q,s in zip(x["old"],x["supply"])]
v5 = [i for i,(q,s) in enumerate(zip(x["old"],x["supply"])) if q>s]
v6 = [d if p>=w else o for d,p,w,o in zip(x["deferred"],x["prices"],x["withdrawal_prices"],x["old"])]
v7 = all(q<=s for q,s in zip(x["old"],x["supply"]))
v8 = [a and p!=o for a,p,o in zip(x["accepted"],x["prices"],x["previous_prices"])]
v9 = x["old"] if x["round"]<=x["last_round"] else x["requested"]
return {'accepted-reduction':v0,'irreversible-exit':v1,'posted-price-lock':v2,'demand-cap':v3,'excess-demand':v4,'clock-step-selection':v5,'deferred-exit-trigger':v6,'round-clearing-quiescence':v7,'price-change-ack':v8,'round-demand-replay':v9}
def check(label, actual, expected):
observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [('exit at trigger', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, False], 'exited': [False, True], 'prices': [9, 25], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [4, 2], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[9, 20], [18, 40], [27, 60], [36, 80], [45, 100]]), ('none accepted', {'old': [5, 3], 'requested': [2, 4], 'accepted': [False, False], 'exited': [False, True], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [4, 2], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[8, 20], [16, 40], [24, 60], [32, 80], [40, 100]]), ('normal contract', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, False], 'exited': [False, True], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [4, 2], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[10, 20], [20, 40], [30, 60], [40, 80], [50, 100]]), ('unequal demand caps', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, False], 'exited': [False, True], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [1, 5], 'supply': [4, 2], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[10, 20], [20, 40], [30, 60], [40, 80], [50, 100]]), ('balanced lots', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, False], 'exited': [False, True], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [5, 3], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[10, 20], [20, 40], [30, 60], [40, 80], [50, 100]]), ('cross lot surplus', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, False], 'exited': [False, True], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [4, 9], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[10, 20], [20, 40], [30, 60], [40, 80], [50, 100]]), ('all accepted', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, True], 'exited': [False, True], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [4, 2], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[10, 20], [20, 40], [30, 60], [40, 80], [50, 100]]), ('no exited lots', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, False], 'exited': [False, False], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [4, 2], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[10, 20], [20, 40], [30, 60], [40, 80], [50, 100]]), ('auction reopened', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, False], 'exited': [False, True], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [4, 2], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': True, 'round': 2, 'last_round': 1}, [[10, 20], [20, 40], [30, 60], [40, 80], [50, 100]])]
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))['posted-price-lock'], 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 |
|---|---|---|---|
| exit at trigger | [9, 25] | [9, 20] | Failed |
| none accepted | [10, 20] | [8, 20] | Failed |
| normal contract | [10, 20] | [10, 20] | Passed |
| unequal demand caps | [10, 20] | [10, 20] | Passed |
| balanced lots | [10, 20] | [10, 20] | Passed |
| cross lot surplus | [10, 20] | [10, 20] | Passed |
| all accepted | [10, 20] | [10, 20] | Passed |
| no exited lots | [10, 20] | [10, 20] | Passed |
| auction reopened | [10, 20] | [10, 20] | Passed |
SHA-256 / b62772ff8d63ab6c92bcf73b8a4d9beee3f84364f7f1826978113cf457f6865c
2 / The unsuccessful fix
Exit 1"""Failure Map reference implementation. Python standard library only."""
import json
N = 1
observations = []
def solve(x):
v0 = [min(o,r) if a else o for o,r,a in zip(x["old"],x["requested"],x["accepted"])]
v1 = [0 if e else q for e,q in zip(x["exited"],x["requested"])]
v2 = x["previous_prices"]
v3 = [min(q,c) for q,c in zip(x["requested"],x["caps"])]
v4 = [max(0,q-s) for q,s in zip(x["old"],x["supply"])]
v5 = [i for i,(q,s) in enumerate(zip(x["old"],x["supply"])) if q>s]
v6 = [d if p>=w else o for d,p,w,o in zip(x["deferred"],x["prices"],x["withdrawal_prices"],x["old"])]
v7 = all(q<=s for q,s in zip(x["old"],x["supply"]))
v8 = [a and p!=o for a,p,o in zip(x["accepted"],x["prices"],x["previous_prices"])]
v9 = x["old"] if x["round"]<=x["last_round"] else x["requested"]
return {'accepted-reduction':v0,'irreversible-exit':v1,'posted-price-lock':v2,'demand-cap':v3,'excess-demand':v4,'clock-step-selection':v5,'deferred-exit-trigger':v6,'round-clearing-quiescence':v7,'price-change-ack':v8,'round-demand-replay':v9}
def check(label, actual, expected):
observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [('exit at trigger', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, False], 'exited': [False, True], 'prices': [9, 25], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [4, 2], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[9, 20], [18, 40], [27, 60], [36, 80], [45, 100]]), ('none accepted', {'old': [5, 3], 'requested': [2, 4], 'accepted': [False, False], 'exited': [False, True], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [4, 2], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[8, 20], [16, 40], [24, 60], [32, 80], [40, 100]]), ('normal contract', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, False], 'exited': [False, True], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [4, 2], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[10, 20], [20, 40], [30, 60], [40, 80], [50, 100]]), ('unequal demand caps', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, False], 'exited': [False, True], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [1, 5], 'supply': [4, 2], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[10, 20], [20, 40], [30, 60], [40, 80], [50, 100]]), ('balanced lots', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, False], 'exited': [False, True], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [5, 3], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[10, 20], [20, 40], [30, 60], [40, 80], [50, 100]]), ('cross lot surplus', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, False], 'exited': [False, True], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [4, 9], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[10, 20], [20, 40], [30, 60], [40, 80], [50, 100]]), ('all accepted', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, True], 'exited': [False, True], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [4, 2], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[10, 20], [20, 40], [30, 60], [40, 80], [50, 100]]), ('no exited lots', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, False], 'exited': [False, False], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [4, 2], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[10, 20], [20, 40], [30, 60], [40, 80], [50, 100]]), ('auction reopened', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, False], 'exited': [False, True], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [4, 2], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': True, 'round': 2, 'last_round': 1}, [[10, 20], [20, 40], [30, 60], [40, 80], [50, 100]])]
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))['posted-price-lock'], 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 |
|---|---|---|---|
| exit at trigger | [8, 20] | [9, 20] | Failed |
| none accepted | [8, 20] | [8, 20] | Passed |
| normal contract | [8, 20] | [10, 20] | Failed |
| unequal demand caps | [8, 20] | [10, 20] | Failed |
| balanced lots | [8, 20] | [10, 20] | Failed |
| cross lot surplus | [8, 20] | [10, 20] | Failed |
| all accepted | [8, 20] | [10, 20] | Failed |
| no exited lots | [8, 20] | [10, 20] | Failed |
| auction reopened | [8, 20] | [10, 20] | Failed |
SHA-256 / 66a343e13e97ffd7b9f82ab6f8e940ca771d452283ac0ed5378e2c97ed963bcb
3 / The verified repair
Exit 0"""Failure Map reference implementation. Python standard library only."""
import json
N = 1
observations = []
def solve(x):
v0 = [min(o,r) if a else o for o,r,a in zip(x["old"],x["requested"],x["accepted"])]
v1 = [0 if e else q for e,q in zip(x["exited"],x["requested"])]
v2 = [p if a else old for p,old,a in zip(x["prices"],x["previous_prices"],x["accepted"])]
v3 = [min(q,c) for q,c in zip(x["requested"],x["caps"])]
v4 = [max(0,q-s) for q,s in zip(x["old"],x["supply"])]
v5 = [i for i,(q,s) in enumerate(zip(x["old"],x["supply"])) if q>s]
v6 = [d if p>=w else o for d,p,w,o in zip(x["deferred"],x["prices"],x["withdrawal_prices"],x["old"])]
v7 = all(q<=s for q,s in zip(x["old"],x["supply"]))
v8 = [a and p!=o for a,p,o in zip(x["accepted"],x["prices"],x["previous_prices"])]
v9 = x["old"] if x["round"]<=x["last_round"] else x["requested"]
return {'accepted-reduction':v0,'irreversible-exit':v1,'posted-price-lock':v2,'demand-cap':v3,'excess-demand':v4,'clock-step-selection':v5,'deferred-exit-trigger':v6,'round-clearing-quiescence':v7,'price-change-ack':v8,'round-demand-replay':v9}
def check(label, actual, expected):
observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
fixtures = [('exit at trigger', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, False], 'exited': [False, True], 'prices': [9, 25], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [4, 2], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[9, 20], [18, 40], [27, 60], [36, 80], [45, 100]]), ('none accepted', {'old': [5, 3], 'requested': [2, 4], 'accepted': [False, False], 'exited': [False, True], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [4, 2], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[8, 20], [16, 40], [24, 60], [32, 80], [40, 100]]), ('normal contract', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, False], 'exited': [False, True], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [4, 2], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[10, 20], [20, 40], [30, 60], [40, 80], [50, 100]]), ('unequal demand caps', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, False], 'exited': [False, True], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [1, 5], 'supply': [4, 2], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[10, 20], [20, 40], [30, 60], [40, 80], [50, 100]]), ('balanced lots', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, False], 'exited': [False, True], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [5, 3], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[10, 20], [20, 40], [30, 60], [40, 80], [50, 100]]), ('cross lot surplus', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, False], 'exited': [False, True], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [4, 9], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[10, 20], [20, 40], [30, 60], [40, 80], [50, 100]]), ('all accepted', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, True], 'exited': [False, True], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [4, 2], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[10, 20], [20, 40], [30, 60], [40, 80], [50, 100]]), ('no exited lots', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, False], 'exited': [False, False], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [4, 2], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': False, 'round': 2, 'last_round': 1}, [[10, 20], [20, 40], [30, 60], [40, 80], [50, 100]]), ('auction reopened', {'old': [5, 3], 'requested': [2, 4], 'accepted': [True, False], 'exited': [False, True], 'prices': [10, 20], 'previous_prices': [8, 20], 'caps': [3, 3], 'supply': [4, 2], 'deferred': [1, 2], 'withdrawal_prices': [9, 25], 'reopened': True, 'round': 2, 'last_round': 1}, [[10, 20], [20, 40], [30, 60], [40, 80], [50, 100]])]
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))['posted-price-lock'], 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 |
|---|---|---|---|
| exit at trigger | [9, 20] | [9, 20] | Passed |
| none accepted | [8, 20] | [8, 20] | Passed |
| normal contract | [10, 20] | [10, 20] | Passed |
| unequal demand caps | [10, 20] | [10, 20] | Passed |
| balanced lots | [10, 20] | [10, 20] | Passed |
| cross lot surplus | [10, 20] | [10, 20] | Passed |
| all accepted | [10, 20] | [10, 20] | Passed |
| no exited lots | [10, 20] | [10, 20] | Passed |
| auction reopened | [10, 20] | [10, 20] | Passed |
SHA-256 / b90b35eabbb72de4ab16e212d2df6aa311cce29e38b62456c8c606350eebc2a1
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 2026-09-29T14:46:08.628589+00:00.
Case digest / 395cfd2500a3479926146cb384c6d2189419ae99884bf7c169cb63fcc78f5a93