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Record 4c576fe19eb44c73a985b32a03eb2948

FAIL

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

✕FAILanswered "ANSWER: [5, 7, 1, 7, 10, 11, 13, 3]" · model Gemma 4 31B QAT

finish_reason: stop · tokens in/out: 381/1070 · cost: $0.000359 · latency: 32173.3 ms

code_tracetemplatestop

verifier_detail: kind=code_trace;campaign=1;query=final_value;detail=foil:value_semantics,augassign_rebinds;n_stmts=32;trace_len=37;traps=aliasing_on=0;late_binding_on=0;shadowing_on=0;inclusive_range_trap_on=0;negative_modulo_on=0;mutable_default_on=0;opaque_literal_on=0;dialect_rules=0;chain_depth=2;stack_depth=3;loop_branch=1;while_on=0;sign_chain=0;index_math=1;misleading_comments=0;neutral_comments=0;confusability=0

trap kind(s) this world was seeded for: aliasing_on=0

lineage: 4c576fe1

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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 1,022 chars · 381 tokens in
Here is a short Python program.

```python
def tally(codes, prefix):
    scores = [0, 1, 6, 5]
    word = 'red'
    prefix = prefix[1:]
    if len(codes) >= 5:
        scores[0] = 4
        codes.append(len(scores))
    else:
        codes.append(len(prefix))
    budget = 6
    budget += 2
    marks = [1, 5]
    rows = marks
    rows += [17]
    rows = rows + [21]
    batch = marks[:]
    batch.append(38)
    codes.append(len(marks) + marks[-1])
    nums = [2, 1, 3, 7, 6]
    total = 0
    for entry in nums:
        if entry > 4:
            total += entry
        else:
            total -= 1
    codes.append(total)
    budget = budget * 2 - 3
    items = [4, 8, 5, 7, 1]
    cells = items[1:len(items) - 1]
    codes.append(len(cells) + cells[0])
    codes.append(budget)
    codes.append(len(word))
    return codes

height = tally([5, 7], 'ab')
```

After this program runs, what is the value of `height`? Work through it carefully, then give the final answer on its own last line as `ANSWER: <python literal>`.
Response 1,070 tokens out · finish: stop
To find the value of `height`, we will trace the execution of the `tally` function with the arguments `codes = [5, 7]` and `prefix = 'ab'`.

1.  **Initialization**:
    *   `codes = [5, 7]`
    *   `prefix = 'ab'`
    *   `scores = [0, 1, 6, 5]`
    *   `word = 'red'`
    *   `prefix = prefix[1:]` $\rightarrow$ `prefix` becomes `'b'`

2.  **First Conditional**:
    *   `if len(codes) >= 5:` $\rightarrow$ `len([5, 7])` is 2. $2 \ge 5$ is **False**.
    *   `else:` block executes: `codes.append(len(prefix))` $\rightarrow$ `len('b')` is 1.
    *   `codes` is now `[5, 7, 1]`.

3.  **Budget and Marks**:
    *   `budget = 6`
    *   `budget += 2` $\rightarrow$ `budget` is 8.
    *   `marks = [1, 5]`
    *   `rows = marks` $\rightarrow$ `rows` is `[1, 5]`.
    *   `rows += [17]` $\rightarrow$ `rows` is `[1, 5, 17]`.
    *   `rows = rows + [21]` $\rightarrow$ `rows` is `[1, 5, 17, 21]`.
    *   `batch = marks[:]` $\rightarrow$ `batch` is `[1, 5]`.
    *   `batch.append(38)` $\rightarrow$ `batch` is `[1, 5, 38]`.

4.  **Updating `codes` (First addition)**:
    *   `codes.append(len(marks) + marks[-1])`
    *   `len(marks)` is 2. `marks[-1]` is 5.
    *   $2 + 5 = 7$.
    *   `codes` is now `[5, 7, 1, 7]`.

5.  **Calculating `total`**:
    *   `nums = [2, 1, 3, 7, 6]`
    *   `total = 0`
    *   Loop through `nums`:
        *   `2 > 4` (False): `total = 0 - 1 = -1`
        *   `1 > 4` (False): `total = -1 - 1 = -2`
        *   `3 > 4` (False): `total = -2 - 1 = -3`
        *   `7 > 4` (True): `total = -3 + 7 = 4`
        *   `6 > 4` (True): `total = 4 + 6 = 10`
    *   `codes.append(total)` $\rightarrow$ `codes.append(10)`.
    *   `codes` is now `[5, 7, 1, 7, 10]`.

6.  **Final calculations and `codes` updates**:
    *   `budget = budget * 2 - 3` $\rightarrow$ $8 * 2 - 3 = 16 - 3 = 13$.
    *   `items = [4, 8, 5, 7, 1]`
    *   `cells = items[1:len(items) - 1]` $\rightarrow$ `items[1:4]` $\rightarrow$ `[8, 5, 7]`.
    *   `codes.append(len(cells) + cells[0])` $\rightarrow$ $3 + 8 = 11$.
    *   `codes` is now `[5, 7, 1, 7, 10, 11]`.
    *   `codes.append(budget)` $\rightarrow$ `codes.append(13)`.
    *   `codes` is now `[5, 7, 1, 7, 10, 11, 13]`.
    *   `codes.append(len(word))` $\rightarrow$ `len('red')` is 3.
    *   `codes` is now `[5, 7, 1, 7, 10, 11, 13, 3]`.

ANSWER: [5, 7, 1, 7, 10, 11, 13, 3]
Reasoning not captured

(no reasoning captured)

Realized dims 27
dimvalue
aliasing_on0.0
answer_size28.0
chain_depth2.0
critical_path_depth1.0
distractor_fraction0.0
identifier_confusability0.0
inclusive_range_trap_on0.0
index_math1.0
late_binding_on0.0
loop_branch1.0
max_nesting0.0
misleading_comments0.0
mutable_default_on0.0
n_closures0.0
n_foil_matches2.0
n_live_aliases0.0
n_statements32.0
n_variables0.0
negative_modulo_on0.0
neutral_comments0.0
opaque_literal_on0.0
shadowing_on0.0
sign_chain0.0
stack_depth3.0
trace_length37.0
traps_on0.0
while_on0.0
Latent params 21
paramvalue
aliasing_on0.0
chain_depth2.0
dialect_rules0.0
distractor_fraction0.0
identifier_confusability0.0
inclusive_range_trap_on0.0
index_math1.0
late_binding_on0.0
loop_branch1.0
max_nesting1.0
misleading_comments0.0
mutable_default_on0.0
n_statements18.0
n_variables4.0
negative_modulo_on0.0
neutral_comments0.0
opaque_literal_on0.0
shadowing_on0.0
sign_chain0.0
stack_depth3.0
while_on0.0