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Record 1b2f79d98ef34137be5f9c1f276afec0

FAIL

Verdict and provenance first; raw prompt/response/reasoning below, collapsed.

✕FAILanswered "reception area" · model Nemotron 3 Super 120B

finish_reason: stop · tokens in/out: 1765/3150 · cost: $0.001559 · latency: 13998.2 ms

belieftemplatestop

verifier_detail: kind=belief;campaign=1

lineage: 1b2f79d9

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Why did it fail? Nemotron 3 Ultra · live on Nebius Token Factory

Ultra reads the prompt, this answer, the verified correct answer and the difficulty settings, then explains the mistake. The verifier's own classification is shown next to it for comparison.

Prompt 5,696 chars · 1,765 tokens in
At 8:40, Noor took the red tablet and placed it in the south stairwell. At 8:41, Bruno brought the red tablet over to the storage room. At 8:42, Marcus brought the red tablet over to the south stairwell. At 8:43, Tobias carried the red tablet to the storage room. At 8:44, Jasper took the red tablet and placed it in the wine cellar. At 8:45, Marcus moved the red tablet into the break room. At 8:46, Tobias carried the red tablet to the security office. At 8:47, Sofia took the red tablet and placed it in the reception area. At 8:48, he moved the red tablet into the rooftop terrace. At 8:49, Jasper reorganized some papers on the desk. At 8:50, Marcus refilled a cup of coffee. At 8:51, Sofia glanced at the clock. At 8:52, Finn glanced at the clock. At 8:53, Iris reorganized some papers on the desk. At 8:54, Tobias refilled a cup of coffee. At 8:55, he refilled a cup of coffee. At 8:56, Sofia glanced at the clock. At 8:57, Jasper stretched and looked out the window. At 8:58, she stretched and looked out the window. At 8:39, Oscar brought the red tablet over to the server room. At 8:59, Marcus made a quick phone call. At 9:00, Iris reorganized some papers on the desk. At 9:01, Jasper stretched and looked out the window. At 9:02, Oscar glanced at the clock. At 9:03, Marcus made a quick phone call. At 9:04, Jasper made a quick phone call. At 9:05, Bruno made a quick phone call. At 9:06, Tobias checked their email. At 9:07, Finn reorganized some papers on the desk. At 9:08, Tobias made a quick phone call. At 9:09, Iris checked their email. At 9:10, Jasper checked their email. At 9:11, Sofia glanced at the clock. At 9:12, Oscar checked their email. At 9:13, Iris reorganized some papers on the desk. At 9:14, Noor checked their email. At 9:15, Iris checked their email. At 9:16, Jasper checked their email. At 9:17, Tobias reorganized some papers on the desk. At 9:18, Jasper stretched and looked out the window. At 9:19, Oscar checked their email. At 9:20, Iris refilled a cup of coffee. At 9:21, Sofia reorganized some papers on the desk. At 9:22, Noor checked their email. At 9:23, Bruno checked their email. At 9:24, Jasper glanced at the clock. At 9:25, Sofia checked their email. At 9:26, Oscar glanced at the clock. At 9:27, Finn checked their email. At 9:28, Tobias made a quick phone call. At 9:29, Sofia made a quick phone call. At 9:30, he reorganized some papers on the desk. At 9:31, Marcus made a quick phone call. At 9:32, Tobias made a quick phone call. At 9:33, Iris checked their email. At 9:34, Sofia glanced at the clock. At 9:35, Marcus checked their email. At 9:36, he refilled a cup of coffee. At 9:37, he glanced at the clock. At 9:38, Finn checked their email. At 9:39, Marcus checked their email. At 9:40, Tobias reorganized some papers on the desk. At 9:41, Oscar made a quick phone call. At 9:42, Bruno made a quick phone call. At 9:43, Jasper reorganized some papers on the desk. At 8:19, Finn moved the red tablet into the greenhouse. At 8:00, Bruno moved the shiny box into the kitchen. At 8:00, Marcus was nearby and saw this happen. At 8:01, Oscar moved the shiny box into the storage room. At 8:01, Marcus happened to be watching. At 8:02, Tobias carried the shiny box to the south stairwell. At 8:02, Marcus happened to be watching. At 8:03, Oscar brought the shiny box over to the break room. At 8:03, Marcus happened to be watching. At 8:04, Noor took the shiny box and placed it in the mail room. At 8:04, he was nearby and saw this happen. At 8:05, he took the shiny box and placed it in the south stairwell. At 8:06, Jasper took the shiny box and placed it in the wine cellar. At 8:06, Marcus was nearby and saw this happen. At 8:07, Finn moved the shiny box into the conference room. At 8:08, Jasper carried the shiny box to the utility closet. At 8:09, Iris took the shiny box and placed it in the greenhouse. At 8:10, he moved the shiny box into the reception area. At 8:11, he carried the shiny box to the break room. At 8:12, he moved the shiny box into the boiler room. At 8:13, Sofia brought the shiny box over to the print room. At 8:14, Oscar moved the shiny box into the kitchen. At 8:15, Finn took the shiny box and placed it in the lobby. At 8:16, Bruno took the shiny box and placed it in the mail room. At 8:17, Noor moved the shiny box into the workshop. At 8:18, he carried the shiny box to the reception area. At 8:20, Oscar took the red tablet and placed it in the break room. At 8:21, Iris brought the red tablet over to the rooftop terrace. At 8:22, Noor brought the red tablet over to the cafeteria. At 8:23, Finn took the red tablet and placed it in the conference room. At 8:24, he carried the red tablet to the break room. At 8:25, he brought the red tablet over to the print room. At 8:26, Oscar brought the red tablet over to the kitchen. At 8:27, Tobias took the red tablet and placed it in the server room. At 8:28, Sofia moved the red tablet into the security office. At 8:29, Jasper brought the red tablet over to the south stairwell. At 8:30, Finn moved the red tablet into the mail room. At 8:31, Noor moved the red tablet into the break room. At 8:32, Marcus brought the red tablet over to the reception area. At 8:33, Finn took the red tablet and placed it in the storage room. At 8:34, Sofia took the red tablet and placed it in the utility closet. At 8:35, he moved the red tablet into the storage room. At 8:36, Tobias brought the red tablet over to the break room. At 8:37, Jasper carried the red tablet to the reception area. At 8:38, Finn moved the red tablet into the break room.

Where does Marcus believe the shiny box is? Answer with only the location name (or 'unknown' if they have no belief).
Response 3,150 tokens out · finish: stop

reception area
Reasoning 11,896 chars
Model reasoning
We need to parse the scenario. The question: "Where does Marcus believe the shiny box is?" We must consider all statements about Marcus's observations or beliefs regarding the shiny box. There are many events describing moving objects; we need to see which ones involve Marcus seeing something about the shiny box, thus forming his belief.

The narrative includes two types of items: red tablet and shiny box. Many actions for each. For the shiny box, there are entries from time 8:00 onward:

- At 8:00, Bruno moved the shiny box into the kitchen.
- At 8:00, Marcus was nearby and saw this happen.
Thus Marcus sees that Bruno moved shiny box into kitchen => He believes shiny box is in kitchen after 8:00 observation.

- At 8:01, Oscar moved the shiny box into the storage room.
- At 8:01, Marcus happened to be watching.
So Marcus sees Oscar move shiny box into storage room => Belief updates to storage room.

- At 8:02, Tobias carried the shiny box to the south stairwell.
- At 8:02, Marcus happened to be watching.
=> Belief: south stairwell.

- At 8:03, Oscar brought the shiny box over to the break room.
- At 8:03, Marcus happened to be watching.
=> Belief: break room.

- At 8:04, Noor took the shiny box and placed it in the mail room.
- At 8:04, he was nearby and saw this happen.
Who is "he"? Likely Marcus? Let's read: "At 8:04, Noor took the shiny box and placed it in the mail room. At 8:04, he was nearby and saw this happen." Since previous sentences were about Marcus being nearby/watching, but here pronoun ambiguous. However earlier pattern: After an action, sometimes they note "Marcus was nearby and saw this happen" or "Marcus happened to be watching". Here they say "he was nearby and saw this happen." Could refer to Marcus again (since Marcus male). So Marcus sees Noor place shiny box in mail room => belief: mail room.

- At 8:05, he took the shiny box and placed it in the south stairwell.
Again "he": likely Marcus? Actually could be someone else? But given context maybe Marcus taking shiny box? Not sure. It says "At 8:05, he took the shiny box and placed it in the south stairwell." If it's Marcus, then he himself moves it, so he knows it's in south stairwell. Then later lines: "At 8:06, Jasper took the shiny box and placed it in the wine cellar. At 8:06, Marcus was nearby and saw this happen." So Marcus sees Jasper place shiny box in wine cellar => belief: wine cellar.

Continue:
- At 8:07, Finn moved the shiny box into the conference room.
No mention of Marcus observing? Not directly. No statement about Marcus seeing. So no update.

- At 8:08, Jasper carried the shiny box to the utility closet.
No mention of Marcus seeing.

- At 8:09, Iris took the shiny box and placed it in the greenhouse.
No mention.

- At 8:10, he moved the shiny box into the reception area.
Again "he": possibly Marcus? Might be Marcus moving shiny box to reception area. If so, he knows it's there.

- At 8:11, he carried the shiny box to the break room.
Again possibly Marcus.

- At 8:12, he moved the shiny box into the boiler room.
Again possibly Marcus.

- At 8:13, Sofia brought the shiny box over to the print room.
No mention.

- At 8:14, Oscar moved the shiny box into the kitchen.
No mention.

- At 8:15, Finn took the shiny box and placed it in the lobby.
No mention.

- At 8:16, Bruno took the shiny box and placed it in the mail room.
No mention.

- At 8:17, Noor moved the shiny box into the workshop.
No mention.

- At 8:18, he carried the shiny box to the reception area.
Again possibly Marcus.

After that, timeline jumps to other events about red tablet etc. Later there is also mention of Oscar took the red tablet... not relevant.

Thus Marcus's belief about shiny box would be based on the last observation he had (if any) of the shiny box location. Need to track his observations and possibly his own actions (if he moves it, he knows where he placed it). Also need to consider if any later observation contradicts earlier.

Let's list all events where Marcus is mentioned as seeing/watching or performing an action with shiny box.

From text:

- 8:00: Bruno moved shiny box into kitchen. Marcus was nearby and saw this happen. (Observation)
- 8:01: Oscar moved shiny box into storage room. Marcus happened to be watching. (Observation)
- 8:02: Tobias carried shiny box to south stairwell. Marcus happened to be watching. (Obs)
- 8:03: Oscar brought shiny box over to break room. Marcus happened to be watching. (Obs)
- 8:04: Noor took shiny box and placed it in mail room. He was nearby and saw this happen. (likely Marcus)
- 8:05: He took the shiny box and placed it in the south stairwell. (If "he" = Marcus, then action)
- 8:06: Jasper took shiny box and placed it in wine cellar. Marcus was nearby and saw this happen. (Obs)
- 8:07: Finn moved shiny box into conference room. (No Marcus mention)
- 8:08: Jasper carried shiny box to utility closet. (No)
- 8:09: Iris took shiny box and placed it in greenhouse. (No)
- 8:10: He moved the shiny box into the reception area. (If Marcus)
- 8:11: He carried the shiny box to the break room. (If Marcus)
- 8:12: He moved the shiny box into the boiler room. (If Marcus)
- 8:13: Sofia brought shiny box over to print room. (No)
- 8:14: Oscar moved shiny box into kitchen. (No)
- 8:15: Finn took shiny box and placed it in lobby. (No)
- 8:16: Bruno took shiny box and placed it in mail room. (No)
- 8:17: Noor moved shiny box into workshop. (No)
- 8:18: He carried the shiny box to the reception area. (If Marcus)

After 8:18, no further mentions of shiny box or Marcus seeing it. Later events are about red tablet etc. So Marcus's last known observation/action regarding shiny box is at 8:18: He carried the shiny box to the reception area. If that is Marcus, then he knows it's in reception area after that.

But we need to verify pronoun references. Let's examine the text around those times:

"At 8:04, Noor took the shiny box and placed it in the mail room. At 8:04, he was nearby and saw this happen."

Given previous sentence: "At 8:03, Oscar brought the shiny box over to the break room. At 8:03, Marcus happened to be watching." So pattern: after an action, they note Marcus's observation. At 8:04 they say "he was nearby and saw this happen." Likely still Marcus.

"At 8:05, he took the shiny box and placed it in the south stairwell." Who is "he"? Could be Marcus continuing? If Marcus just saw Noor place it in mail room at 8:04, then at 8:05 he takes it from mail room and puts in south stairwell. That seems plausible: Marcus picks up the shiny box from mail room and moves it to south stairwell. So his belief after moving it would be south stairwell.

Then "At 8:06, Jasper took the shiny box and placed it in the wine cellar. At 8:06, Marcus was nearby and saw this happen." So after Marcus moved it to south stairwell at 8:05, Jasper then takes it (maybe from south stairwell?) and places in wine cellar at 8:06, Marcus sees that. So after 8:06 observation, Marcus believes it's in wine cellar.

Then "At 8:07, Finn moved the shiny box into the conference room." No Marcus observation.

"At 8:08, Jasper carried the shiny box to the utility closet." No Marcus.

"At 8:09, Iris took the shiny box and placed it in the greenhouse." No Marcus.

"At 8:10, he moved the shiny box into the reception area." Who is he? Could be Marcus again, perhaps after seeing it elsewhere? If Marcus didn't see the moves 8:07-8:09, he might not know its location. But at 8:10 he moves it into reception area, implying he knows where it is (maybe he found it?). However if he didn't see previous moves, he might not know where it is to move it. But the narrative may assume he somehow knows. However we need to interpret based on given statements only; we cannot assume he knows unless stated. The only statements about his knowledge are when he sees or performs an action himself (since if he performs it, he knows where he put it). So we need to consider only events where Marcus is the subject of the action (explicitly "he" referring to Marcus) or where it says Marcus saw/watched.

Thus we need to determine for each "he" whether it's Marcus. The text uses "he" frequently after 8:04 onward. Let's see if any other male characters could be referred to: Bruno, Oscar, Tobias, Finn, Jasper, Noor (though Noor could be male or female? Name Noor could be any gender but likely male? Not sure). Marcus is male. The pronoun "he" could refer to any of these males. However the pattern earlier: after each action they often note Marcus's observation explicitly: "Marcus was nearby and saw this happen" or "Marcus happened to be watching". When they don't mention Marcus, they use "he" maybe referring to the person who just performed the action? Let's check.

At 8:00: "Bruno moved the shiny box into the kitchen. At 8:00, Marcus was nearby and saw this happen." So they used name then explicit Marcus.

At 8:01: "Oscar moved the shiny box into the storage room. At 8:01, Marcus happened to be watching." Same pattern.

At 8:02: "Tobias carried the shiny box to the south stairwell. At 8:02, Marcus happened to be watching."

At 8:03: "Oscar brought the shiny box over to the break room. At 8:03, Marcus happened to be watching."

At 8:04: "Noor took the shiny box and placed it in the mail room. At 8:04, he was nearby and saw this happen." Here they didn't repeat "Marcus". They used "he". Could be Marcus still, following pattern but using pronoun to avoid repetition. So likely Marcus.

At 8:05: "He took the shiny box and placed it in the south stairwell." If they continued with Marcus as subject, they'd say "He took...". This would be Marcus taking the shiny box (maybe from mail room) and placing it in south stairwell. So yes.

At 8:06: "Jasper took the shiny box and placed it in the wine cellar. At 8:06, Marcus was nearby and saw this happen." So after Marcus's own action at 8:05, Jasper acts, Marcus sees.

Thus the pattern: Marcus's own actions are described with "He" without naming him, while others' actions are named, then followed by Marcus observation statement.

Thus we can interpret:

- 8:00-8:03: Marcus observed others moving shiny box.
- 8:04: Marcus observed Noor place in mail room.
- 8:05: Marcus himself took shiny box and placed it in south stairwell.
- 8:06: Marcus observed Jasper place in wine cellar.
- 8:07-8:09: No Marcus mention; actions by Finn, Jasper, Iris.
- 8:10: "He moved the shiny box into the reception area." Likely Marcus again (since after a gap of no Marcus mention, they might resume with Marcus action). But we need to check if any other male could be the subject. The last named male before 8:10 is Iris (female) at 8:09. So "he" likely refers to Marcus again. So Marcus moves shiny box into reception area at 8:10.
- 8:11: "He carried the shiny box to the break room." Likely Marcus continues.
- 8:12: "He moved the shiny box into the boiler room." Likely Marcus.
- 8:13: "Sofia brought the shiny box over to the print room." (female)
- 8:14: "Oscar moved the shiny box into the kitchen." (male)
- 8:15: "Finn took the shiny box and placed it in the lobby." (male)
- 8:16: "Bruno took the shiny box and placed it in the mail room." (male)
- 8:17: "Noor moved the shiny box into the workshop." (maybe male/female)
- 8:18: "He carried the shiny box to the reception area." Again likely Marcus.

Thus Marcus's last known action regarding shiny box is at 8:18: He carried the shiny box to the reception area. Therefore he believes it's in reception area.

But we need to consider if after 8:18 there is any further observation of Marcus seeing something else about shiny box. The text after 8:18 goes into red tablet events and other actions, no mention of Marcus seeing shiny box. So his belief remains that it's in reception area.

Thus answer: reception area.

Check if any earlier observation after 8:18 could override? No.

Thus final answer: reception area.
Realized dims 6
dimvalue
context_length104.0
coreference18.0
distractors30.0
entity_state19.0
temporal0.48039581777445856
witness_gap12.0
Latent params 6
paramvalue
chain_length19.0
coref_pressure6.0
distractor_events30.0
filler_events46.0
scramble0.75
witness_cutoff0.675