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-4 | 0 | 1 | null | [
{
"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 outside the tags.",
"rol... | [
{
"content": "\n[2, 1]\n</assistant>",
"reasoning_content": "\nLet me trace through this code step by step.\n\n1. We have two async functions:\n - `a()` which returns 1\n - `b()` which returns 2\n\n2. In `main()`, we call `asyncio.gather(b(), a())`. This schedules both coroutines to run concurrently.\n\... | null | 1 | null | null | null | 2.640377 | 2,640 | 2026-05-30T17:15:27.577309Z | {
"category": "asyncio",
"difficulty": "medium",
"id": "asyncio-gather-order",
"is_completed": true,
"is_truncated": false,
"metrics": {
"exact_match_reward": 1,
"num_turns": 1
},
"stop_condition": "no_tools",
"timing": {
"env": {
"duration": 0,
"spans": []
},
"generati... | 1 |
hosted-5 | 0 | 2 | null | [
{
"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 outside the tags.",
"rol... | [
{
"content": "\n[2, 1]\n</assistant>",
"reasoning_content": "\nThe user is asking what the given Python code will print. Let me analyze this step by step.\n\nThe code defines two async functions `a()` and `b()` that return 1 and 2 respectively. Then in `main()`, it uses `asyncio.gather()` to run both functi... | null | 1 | null | null | null | 2.640283 | 2,640 | 2026-05-30T17:15:27.577309Z | {
"category": "asyncio",
"difficulty": "medium",
"id": "asyncio-gather-order",
"is_completed": true,
"is_truncated": false,
"metrics": {
"exact_match_reward": 1,
"num_turns": 1
},
"stop_condition": "no_tools",
"timing": {
"env": {
"duration": 0,
"spans": []
},
"generati... | 1 |
hosted-6 | 0 | 3 | null | [
{
"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 outside the tags.",
"rol... | [
{
"content": "\n<answer>[2, 1]</answer>\n</assistant>",
"reasoning_content": "\nLet me analyze this code step by step.\n\n1. We have two async functions `a()` and `b()` that return 1 and 2 respectively.\n2. In `main()`, we call `asyncio.gather(b(), a())` which schedules both coroutines to run concurrently.\... | null | 1 | null | null | null | 2.640219 | 2,640 | 2026-05-30T17:15:27.577309Z | {
"category": "asyncio",
"difficulty": "medium",
"id": "asyncio-gather-order",
"is_completed": true,
"is_truncated": false,
"metrics": {
"exact_match_reward": 1,
"num_turns": 1
},
"stop_condition": "no_tools",
"timing": {
"env": {
"duration": 0,
"spans": []
},
"generati... | 1 |
hosted-1 | 1 | 1 | null | [
{
"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 outside the tags.",
"rol... | [
{
"content": "\n<answer>coroutine</answer>\n</assistant>",
"reasoning_content": "\nThe user is asking what the code will print. Let me trace through it step by step.\n\n1. The code defines an async function `greet()` that returns the string 'hello'.\n2. Then it calls `greet()` and assigns the result to `res... | null | 1 | null | null | null | 1.988247 | 1,988 | 2026-05-30T17:15:27.577309Z | {
"category": "asyncio",
"difficulty": "medium",
"id": "coroutine-not-awaited",
"is_completed": true,
"is_truncated": false,
"metrics": {
"exact_match_reward": 1,
"num_turns": 1
},
"stop_condition": "no_tools",
"timing": {
"env": {
"duration": 0,
"spans": []
},
"generat... | 1 |
hosted-2 | 1 | 2 | null | [
{
"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 outside the tags.",
"rol... | [
{
"content": "\n<answer>coroutine</answer>\n</assistant>",
"reasoning_content": "\nThe user is asking what the code will print. Let me analyze this step by step.\n\n1. The code defines an async function `greet()` that returns 'hello'\n2. It calls `greet()` without awaiting it, which creates a coroutine obje... | null | 1 | null | null | null | 1.98818 | 1,988 | 2026-05-30T17:15:27.577309Z | {
"category": "asyncio",
"difficulty": "medium",
"id": "coroutine-not-awaited",
"is_completed": true,
"is_truncated": false,
"metrics": {
"exact_match_reward": 1,
"num_turns": 1
},
"stop_condition": "no_tools",
"timing": {
"env": {
"duration": 0,
"spans": []
},
"generat... | 1 |
hosted-3 | 1 | 3 | null | [
{
"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 outside the tags.",
"rol... | [
{
"content": "\n<answer>coroutine</answer>\n</assistant>",
"reasoning_content": "\nThe user wants to know what the code prints. Let me trace through it:\n\n1. They import asyncio\n2. They define an async function `greet()` that returns 'hello'\n3. They call `greet()` without await and assign it to `result`\... | null | 1 | null | null | null | 1.988119 | 1,988 | 2026-05-30T17:15:27.577309Z | {
"category": "asyncio",
"difficulty": "medium",
"id": "coroutine-not-awaited",
"is_completed": true,
"is_truncated": false,
"metrics": {
"exact_match_reward": 1,
"num_turns": 1
},
"stop_condition": "no_tools",
"timing": {
"env": {
"duration": 0,
"spans": []
},
"generat... | 1 |
hosted-7 | 2 | 1 | null | [
{
"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 outside the tags.",
"rol... | [
{
"content": "\nTrue\n</assistant>",
"reasoning_content": "\nI need to determine what this Python code prints. Let me break it down:\n\n1. A global counter is initialized to 0\n2. A function `inc()` increments the counter 1000 times in a loop\n3. 5 threads are created, each running the `inc()` function\n4. ... | null | 1 | null | null | null | 3.546025 | 3,546 | 2026-05-30T17:15:31.797579Z | {
"category": "threading",
"difficulty": "hard",
"id": "thread-race-counter",
"is_completed": true,
"is_truncated": false,
"metrics": {
"exact_match_reward": 1,
"num_turns": 1
},
"stop_condition": "no_tools",
"timing": {
"env": {
"duration": 0,
"spans": []
},
"generatio... | 1 |
hosted-8 | 2 | 2 | null | [
{
"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 outside the tags.",
"rol... | [
{
"content": "\nI'll trace through this code to understand what it prints.\n\nThe code creates 5 threads, each incrementing a global counter 1000 times. The key issue is that `counter += 1` is not an atomic operation - it involves reading, incrementing, and writing back. This creates a race condition.\n\nLet me... | null | 0 | null | null | null | 3.545953 | 3,546 | 2026-05-30T17:15:31.797579Z | {
"category": "threading",
"difficulty": "hard",
"id": "thread-race-counter",
"is_completed": true,
"is_truncated": false,
"metrics": {
"exact_match_reward": 0,
"num_turns": 1
},
"stop_condition": "no_tools",
"timing": {
"env": {
"duration": 0,
"spans": []
},
"generatio... | 0 |
hosted-9 | 2 | 3 | null | [
{
"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 outside the tags.",
"rol... | [
{
"content": "\nTrue\n</assistant>",
"reasoning_content": "\nThis is a Python threading example. Let me trace through the code:\n\n1. A global counter is initialized to 0\n2. A function `inc()` increments the counter 1000 times\n3. 5 threads are created, each running `inc()`\n4. All threads are started and ... | null | 1 | null | null | null | 3.545905 | 3,546 | 2026-05-30T17:15:31.797579Z | {
"category": "threading",
"difficulty": "hard",
"id": "thread-race-counter",
"is_completed": true,
"is_truncated": false,
"metrics": {
"exact_match_reward": 1,
"num_turns": 1
},
"stop_condition": "no_tools",
"timing": {
"env": {
"duration": 0,
"spans": []
},
"generatio... | 1 |
hosted-10 | 3 | 1 | null | [
{
"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 outside the tags.",
"rol... | [
{
"content": "\n<answer>RuntimeError</answer>\n</assistant>",
"reasoning_content": "\nLet me trace through this code step by step.\n\n1. `inner()` is an async function that returns 42.\n2. `outer()` is an async function that calls `asyncio.run(inner())`.\n3. The main code tries to run `asyncio.run(outer())`... | null | 1 | null | null | null | 4.251579 | 4,252 | 2026-05-30T17:15:31.797579Z | {
"category": "asyncio",
"difficulty": "hard",
"id": "asyncio-run-nested",
"is_completed": true,
"is_truncated": false,
"metrics": {
"exact_match_reward": 1,
"num_turns": 1
},
"stop_condition": "no_tools",
"timing": {
"env": {
"duration": 0,
"spans": []
},
"generation":... | 1 |
hosted-11 | 3 | 2 | null | [
{
"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 outside the tags.",
"rol... | [
{
"content": "\nRuntimeError\n</assistant>",
"reasoning_content": "\nLet me trace through this code carefully.\n\n1. We have an `inner()` async function that returns 42\n2. We have an `outer()` async function that calls `asyncio.run(inner())` and returns the result\n3. In the main code, we call `asyncio.run... | null | 1 | null | null | null | 4.251493 | 4,251 | 2026-05-30T17:15:31.797579Z | {
"category": "asyncio",
"difficulty": "hard",
"id": "asyncio-run-nested",
"is_completed": true,
"is_truncated": false,
"metrics": {
"exact_match_reward": 1,
"num_turns": 1
},
"stop_condition": "no_tools",
"timing": {
"env": {
"duration": 0,
"spans": []
},
"generation":... | 1 |
hosted-12 | 3 | 3 | null | [
{
"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 outside the tags.",
"rol... | [
{
"content": "\nRuntimeError\n</assistant>",
"reasoning_content": "\nLet me trace through this code carefully.\n\n1. We have an async function `inner()` that returns 42.\n2. We have an async function `outer()` that calls `asyncio.run(inner())`.\n3. Then we call `asyncio.run(outer())` inside a try-except blo... | null | 1 | null | null | null | 4.251432 | 4,251 | 2026-05-30T17:15:31.797579Z | {
"category": "asyncio",
"difficulty": "hard",
"id": "asyncio-run-nested",
"is_completed": true,
"is_truncated": false,
"metrics": {
"exact_match_reward": 1,
"num_turns": 1
},
"stop_condition": "no_tools",
"timing": {
"env": {
"duration": 0,
"spans": []
},
"generation":... | 1 |
hosted-13 | 4 | 1 | null | [
{
"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 outside the tags.",
"rol... | [
{
"content": "\n'main'\n<answer>'main'</answer>\n</assistant>",
"reasoning_content": "\nThe user is asking what gets printed first when running this Python code. Let me trace through the execution:\n\n1. The code imports `threading`\n2. It defines a function `delayed()` that prints 'timer'\n3. It creates a ... | null | 0 | null | null | null | 6.699064 | 6,699 | 2026-05-30T17:15:31.797579Z | {
"category": "threading",
"difficulty": "medium",
"id": "timer-execution-order",
"is_completed": true,
"is_truncated": false,
"metrics": {
"exact_match_reward": 0,
"num_turns": 1
},
"stop_condition": "no_tools",
"timing": {
"env": {
"duration": 0,
"spans": []
},
"gener... | 0 |
hosted-14 | 4 | 2 | null | [
{
"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 outside the tags.",
"rol... | [
{
"content": "\nmain\ntimer\n</assistant>",
"reasoning_content": "\nLet me trace through this code step by step:\n\n1. We import threading\n2. We define a function `delayed()` that prints 'timer'\n3. We create a Timer object with 0.0 seconds delay that will call `delayed()`\n4. We start the timer with `t.st... | null | 0 | null | null | null | 6.698776 | 6,699 | 2026-05-30T17:15:31.797579Z | {
"category": "threading",
"difficulty": "medium",
"id": "timer-execution-order",
"is_completed": true,
"is_truncated": false,
"metrics": {
"exact_match_reward": 0,
"num_turns": 1
},
"stop_condition": "no_tools",
"timing": {
"env": {
"duration": 0,
"spans": []
},
"gener... | 0 |
hosted-15 | 4 | 3 | null | [
{
"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 outside the tags.",
"rol... | [
{
"content": "\n<answer>main</answer>\n</assistant>",
"reasoning_content": "\nThe user is asking what prints first when this code runs. Let me trace through the Python threading code step by step.\n\n1. `import threading` - imports the threading module\n2. `def delayed(): print('timer')` - defines a functio... | null | 1 | null | null | null | 6.698617 | 6,699 | 2026-05-30T17:15:31.797579Z | {
"category": "threading",
"difficulty": "medium",
"id": "timer-execution-order",
"is_completed": true,
"is_truncated": false,
"metrics": {
"exact_match_reward": 1,
"num_turns": 1
},
"stop_condition": "no_tools",
"timing": {
"env": {
"duration": 0,
"spans": []
},
"gener... | 1 |
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