trace_id string | example_id int64 | rollout_number int64 | task null | prompt list | completion list | answer null | reward float64 | score null | correct null | num_steps null | total_time float64 | latency_ms int64 | created_at string | info dict | exact_match_reward float64 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
hosted-7 | 0 | 1 | null | [
{
"role": "system",
"content": "You are a Python execution tracer specialising in async and concurrent code. Trace through asyncio event loops, threading behaviour, and race conditions carefully. Always wrap your final answer in <answer> tags with the exact output only. Do not include any explanation outsid... | [
{
"role": "assistant",
"content": "\n<answer>True</answer>\n",
"reasoning_content": "\nLet me analyze this code step by step.\n\n1. We have a global counter initialized to 0\n2. We define a function `inc()` that increments the counter 1000 times\n3. We create 5 threads, each running the `inc()` function... | null | 1 | null | null | null | 11.46806 | 11,468 | 2026-06-03T13:41:25.575428Z | {
"id": "thread-race-counter",
"difficulty": "hard",
"category": "threading",
"timing": {
"start_time": 1780494072.2629685,
"setup": {
"start": 0,
"end": 0,
"duration": 0
},
"generation": {
"start": 1780494072.2629685,
"end": 1780494083.7286863,
"duration": 11... | 1 |
hosted-8 | 0 | 2 | null | [
{
"role": "system",
"content": "You are a Python execution tracer specialising in async and concurrent code. Trace through asyncio event loops, threading behaviour, and race conditions carefully. Always wrap your final answer in <answer> tags with the exact output only. Do not include any explanation outsid... | [
{
"role": "assistant",
"content": "\n<answer>True</answer>\n",
"reasoning_content": "\nLet me trace through this code carefully.\n\nThe code creates 5 threads, each running the `inc` function which increments a global counter 1000 times. The expected final value would be 5000 (5 threads × 1000 increment... | null | 1 | null | null | null | 11.467907 | 11,468 | 2026-06-03T13:41:25.575428Z | {
"id": "thread-race-counter",
"difficulty": "hard",
"category": "threading",
"timing": {
"start_time": 1780494072.2631621,
"setup": {
"start": 0,
"end": 0,
"duration": 0
},
"generation": {
"start": 1780494072.2631621,
"end": 1780494075.1061995,
"duration": 2.... | 1 |
hosted-9 | 0 | 3 | null | [
{
"role": "system",
"content": "You are a Python execution tracer specialising in async and concurrent code. Trace through asyncio event loops, threading behaviour, and race conditions carefully. Always wrap your final answer in <answer> tags with the exact output only. Do not include any explanation outsid... | [
{
"role": "assistant",
"content": "\nimport threading\n\ncounter = 0\ndef inc():\n global counter\n for _ in range(1000): counter += 1\n\nthreads = [threading.Thread(target=inc) for _ in range(5)]\nfor t in threads: t.start()\nfor t in threads: t.join()\nprint(counter < 5000)\n",
"reasoning_conten... | null | 0 | null | null | null | 11.467836 | 11,468 | 2026-06-03T13:41:25.575428Z | {
"id": "thread-race-counter",
"difficulty": "hard",
"category": "threading",
"timing": {
"start_time": 1780494072.2632515,
"setup": {
"start": 0,
"end": 0,
"duration": 0
},
"generation": {
"start": 1780494072.2632515,
"end": 1780494076.102774,
"duration": 3.8... | 0 |
hosted-1 | 2 | 1 | null | [
{
"role": "system",
"content": "You are a Python execution tracer specialising in async and concurrent code. Trace through asyncio event loops, threading behaviour, and race conditions carefully. Always wrap your final answer in <answer> tags with the exact output only. Do not include any explanation outsid... | [
{
"role": "assistant",
"content": "\nRuntimeError\n",
"reasoning_content": "\nLet me trace through this code step by step.\n\n1. We have two async functions: `fail()` which raises a RuntimeError with message 'boom', and `ok()` which returns 3.\n\n2. In `main()`, we use `asyncio.gather()` with `return_ex... | null | 1 | null | null | null | 6.786851 | 6,787 | 2026-06-03T13:41:20.541974Z | {
"id": "asyncio-gather-exception-type",
"difficulty": "hard",
"category": "asyncio",
"timing": {
"start_time": 1780494072.297175,
"setup": {
"start": 0,
"end": 0,
"duration": 0
},
"generation": {
"start": 1780494072.297175,
"end": 1780494079.0812874,
"duratio... | 1 |
hosted-2 | 2 | 2 | null | [
{
"role": "system",
"content": "You are a Python execution tracer specialising in async and concurrent code. Trace through asyncio event loops, threading behaviour, and race conditions carefully. Always wrap your final answer in <answer> tags with the exact output only. Do not include any explanation outsid... | [
{
"role": "assistant",
"content": "\n<answer>RuntimeError</answer>\n",
"reasoning_content": "\nLet me trace through this code carefully.\n\n1. We have two async functions: `fail()` which raises a RuntimeError, and `ok()` which returns 3.\n\n2. In `main()`, we use `asyncio.gather()` with `return_exceptio... | null | 1 | null | null | null | 6.78673 | 6,787 | 2026-06-03T13:41:20.541974Z | {
"id": "asyncio-gather-exception-type",
"difficulty": "hard",
"category": "asyncio",
"timing": {
"start_time": 1780494072.2973385,
"setup": {
"start": 0,
"end": 0,
"duration": 0
},
"generation": {
"start": 1780494072.2973385,
"end": 1780494075.456879,
"durati... | 1 |
hosted-3 | 2 | 3 | null | [
{
"role": "system",
"content": "You are a Python execution tracer specialising in async and concurrent code. Trace through asyncio event loops, threading behaviour, and race conditions carefully. Always wrap your final answer in <answer> tags with the exact output only. Do not include any explanation outsid... | [
{
"role": "assistant",
"content": "\n<answer>RuntimeError</answer>\n",
"reasoning_content": "\nLet me trace through this code step by step.\n\n1. We have two async functions: `fail()` which raises a RuntimeError with message 'boom', and `ok()` which returns 3.\n\n2. In `main()`, we use `asyncio.gather()... | null | 1 | null | null | null | 6.786416 | 6,786 | 2026-06-03T13:41:20.541974Z | {
"id": "asyncio-gather-exception-type",
"difficulty": "hard",
"category": "asyncio",
"timing": {
"start_time": 1780494072.297668,
"setup": {
"start": 0,
"end": 0,
"duration": 0
},
"generation": {
"start": 1780494072.297668,
"end": 1780494074.789327,
"duration... | 1 |
hosted-4 | 3 | 1 | null | [
{
"role": "system",
"content": "You are a Python execution tracer specialising in async and concurrent code. Trace through asyncio event loops, threading behaviour, and race conditions carefully. Always wrap your final answer in <answer> tags with the exact output only. Do not include any explanation outsid... | [
{
"role": "assistant",
"content": "\n<answer>cancelled</answer>\n",
"reasoning_content": "\nLet me trace through this code step by step.\n\n1. `asyncio.run(main())` is called, which creates an event loop and runs the `main()` coroutine.\n\n2. Inside `main()`:\n - `asyncio.create_task(asyncio.sleep(10)... | null | 1 | null | null | null | 7.077161 | 7,077 | 2026-06-03T13:41:25.575428Z | {
"id": "asyncio-task-cancelled",
"difficulty": "hard",
"category": "asyncio",
"timing": {
"start_time": 1780494072.3198347,
"setup": {
"start": 0,
"end": 0,
"duration": 0
},
"generation": {
"start": 1780494072.3198347,
"end": 1780494076.3247557,
"duration": 4... | 1 |
hosted-5 | 3 | 2 | null | [
{
"role": "system",
"content": "You are a Python execution tracer specialising in async and concurrent code. Trace through asyncio event loops, threading behaviour, and race conditions carefully. Always wrap your final answer in <answer> tags with the exact output only. Do not include any explanation outsid... | [
{
"role": "assistant",
"content": "\n<answer>cancelled</answer>\n",
"reasoning_content": "\nLet me trace through this code step by step:\n\n1. `asyncio.run(main())` is called, which creates a new event loop and runs the `main()` coroutine\n2. Inside `main()`:\n - `asyncio.create_task(asyncio.sleep(10)... | null | 1 | null | null | null | 7.077072 | 7,077 | 2026-06-03T13:41:25.575428Z | {
"id": "asyncio-task-cancelled",
"difficulty": "hard",
"category": "asyncio",
"timing": {
"start_time": 1780494072.3199437,
"setup": {
"start": 0,
"end": 0,
"duration": 0
},
"generation": {
"start": 1780494072.3199437,
"end": 1780494079.3936288,
"duration": 7... | 1 |
hosted-6 | 3 | 3 | null | [
{
"role": "system",
"content": "You are a Python execution tracer specialising in async and concurrent code. Trace through asyncio event loops, threading behaviour, and race conditions carefully. Always wrap your final answer in <answer> tags with the exact output only. Do not include any explanation outsid... | [
{
"role": "assistant",
"content": "\n<answer>cancelled</answer>\n",
"reasoning_content": "\nLet me trace through this code step by step.\n\n1. `asyncio.run(main())` is called, which creates an event loop and runs the `main()` coroutine.\n\n2. Inside `main()`:\n - `task = asyncio.create_task(asyncio.sl... | null | 1 | null | null | null | 7.077119 | 7,077 | 2026-06-03T13:41:25.575428Z | {
"id": "asyncio-task-cancelled",
"difficulty": "hard",
"category": "asyncio",
"timing": {
"start_time": 1780494072.3200443,
"setup": {
"start": 0,
"end": 0,
"duration": 0
},
"generation": {
"start": 1780494072.3200443,
"end": 1780494074.7970657,
"duration": 2... | 1 |
hosted-10 | 4 | 1 | null | [
{
"role": "system",
"content": "You are a Python execution tracer specialising in async and concurrent code. Trace through asyncio event loops, threading behaviour, and race conditions carefully. Always wrap your final answer in <answer> tags with the exact output only. Do not include any explanation outsid... | [
{
"role": "assistant",
"content": "\n`True`\n",
"reasoning_content": "\nLet me trace through this asyncio code step by step.\n\n1. `asyncio.run(main())` starts the event loop and runs the `main()` coroutine.\n\n2. Inside `main()`:\n - `asyncio.create_task(finish())` schedules the `finish()` coroutine ... | null | 1 | null | null | null | 12.666268 | 12,666 | 2026-06-03T13:41:25.575428Z | {
"id": "asyncio-yield-before-finish",
"difficulty": "hard",
"category": "asyncio",
"timing": {
"start_time": 1780494072.3499634,
"setup": {
"start": 0,
"end": 0,
"duration": 0
},
"generation": {
"start": 1780494072.3499634,
"end": 1780494085.0131023,
"duratio... | 1 |
hosted-11 | 4 | 2 | null | [
{
"role": "system",
"content": "You are a Python execution tracer specialising in async and concurrent code. Trace through asyncio event loops, threading behaviour, and race conditions carefully. Always wrap your final answer in <answer> tags with the exact output only. Do not include any explanation outsid... | [
{
"role": "assistant",
"content": "\nI need to trace through this async code carefully to understand the execution order.\n\nLet me break down what happens:\n\n1. `asyncio.run(main())` starts the event loop\n2. `main()` calls `asyncio.create_task(finish())` - this schedules the `finish()` coroutine as a tas... | null | 1 | null | null | null | 12.666124 | 12,666 | 2026-06-03T13:41:25.575428Z | {
"id": "asyncio-yield-before-finish",
"difficulty": "hard",
"category": "asyncio",
"timing": {
"start_time": 1780494072.3501205,
"setup": {
"start": 0,
"end": 0,
"duration": 0
},
"generation": {
"start": 1780494072.3501205,
"end": 1780494077.976913,
"duration... | 1 |
hosted-12 | 4 | 3 | null | [
{
"role": "system",
"content": "You are a Python execution tracer specialising in async and concurrent code. Trace through asyncio event loops, threading behaviour, and race conditions carefully. Always wrap your final answer in <answer> tags with the exact output only. Do not include any explanation outsid... | [
{
"role": "assistant",
"content": "\n`True`\n",
"reasoning_content": "\nLet me trace through this code step by step.\n\n1. We start with `done = False` as a global variable.\n\n2. We define two async functions:\n - `finish()`: sets `done = True` after awaiting `asyncio.sleep(0)`\n - `main()`: create... | null | 1 | null | null | null | 12.665004 | 12,665 | 2026-06-03T13:41:25.575428Z | {
"id": "asyncio-yield-before-finish",
"difficulty": "hard",
"category": "asyncio",
"timing": {
"start_time": 1780494072.3512504,
"setup": {
"start": 0,
"end": 0,
"duration": 0
},
"generation": {
"start": 1780494072.3512504,
"end": 1780494082.3588498,
"duratio... | 1 |
hosted-13 | 4 | 4 | null | [
{
"role": "system",
"content": "You are a Python execution tracer specialising in async and concurrent code. Trace through asyncio event loops, threading behaviour, and race conditions carefully. Always wrap your final answer in <answer> tags with the exact output only. Do not include any explanation outsid... | [
{
"role": "assistant",
"content": "\n`True`\n",
"reasoning_content": "\nLet me trace through this asyncio code step by step.\n\n1. `asyncio.run(main())` starts the event loop and runs the `main()` coroutine.\n\n2. Inside `main()`:\n - `asyncio.create_task(finish())` schedules the `finish()` coroutine ... | null | 1 | null | null | null | 12.666268 | 12,666 | 2026-06-03T13:41:30.241196Z | {
"id": "asyncio-yield-before-finish",
"difficulty": "hard",
"category": "asyncio",
"timing": {
"start_time": 1780494072.3499634,
"setup": {
"start": 0,
"end": 0,
"duration": 0
},
"generation": {
"start": 1780494072.3499634,
"end": 1780494085.0131023,
"duratio... | 1 |
hosted-14 | 4 | 5 | null | [
{
"role": "system",
"content": "You are a Python execution tracer specialising in async and concurrent code. Trace through asyncio event loops, threading behaviour, and race conditions carefully. Always wrap your final answer in <answer> tags with the exact output only. Do not include any explanation outsid... | [
{
"role": "assistant",
"content": "\nI need to trace through this async code carefully to understand the execution order.\n\nLet me break down what happens:\n\n1. `asyncio.run(main())` starts the event loop\n2. `main()` calls `asyncio.create_task(finish())` - this schedules the `finish()` coroutine as a tas... | null | 1 | null | null | null | 12.666124 | 12,666 | 2026-06-03T13:41:30.241196Z | {
"id": "asyncio-yield-before-finish",
"difficulty": "hard",
"category": "asyncio",
"timing": {
"start_time": 1780494072.3501205,
"setup": {
"start": 0,
"end": 0,
"duration": 0
},
"generation": {
"start": 1780494072.3501205,
"end": 1780494077.976913,
"duration... | 1 |
hosted-15 | 4 | 6 | null | [
{
"role": "system",
"content": "You are a Python execution tracer specialising in async and concurrent code. Trace through asyncio event loops, threading behaviour, and race conditions carefully. Always wrap your final answer in <answer> tags with the exact output only. Do not include any explanation outsid... | [
{
"role": "assistant",
"content": "\n`True`\n",
"reasoning_content": "\nLet me trace through this code step by step.\n\n1. We start with `done = False` as a global variable.\n\n2. We define two async functions:\n - `finish()`: sets `done = True` after awaiting `asyncio.sleep(0)`\n - `main()`: create... | null | 1 | null | null | null | 12.665004 | 12,665 | 2026-06-03T13:41:30.241196Z | {
"id": "asyncio-yield-before-finish",
"difficulty": "hard",
"category": "asyncio",
"timing": {
"start_time": 1780494072.3512504,
"setup": {
"start": 0,
"end": 0,
"duration": 0
},
"generation": {
"start": 1780494072.3512504,
"end": 1780494082.3588498,
"duratio... | 1 |
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