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gpt-5.4-nano | RAG off

13_rtllm_miscellaneous / task_03 | freq_divbyfrac

benchmarkrtllm
task_idrtllm/13_rtllm_miscellaneous/task_03
samples_total10
final_success_samples10
final_success_rate_samples100.0%
functional_pass_rate_samples100.0%
synth_pass_rate_samples100.0%
source_runsrun_20260427_102437_171676_163c0c

Что показывает эта страница

Здесь перечислены все реальные попытки этой модели на одной задаче. По каждой попытке можно увидеть, до какой стадии она дошла, где именно сломалась и какое сообщение об ошибке вернулось из syntax, functional или synthesis.

Samples

sample run extract_ok syntax_ok functional_ok openlane_ok final_success failure_stage failure_reason details
sample_1 run_20260427_102437_171676_163c0c ok ok ok ok ok success Full pipeline success
Open details
sample_dir: E:\Work\MIEM\VKR\Analyse\data\model_dataset\models\gpt-5-4-nano\rag_off\benchmarks\rtllm\tasks\rtllm__13_rtllm_miscellaneous__task_03\samples\run_20260427_102437_171676_163c0c__sample_1
generated.v preview 
module freq_divbyfrac (
    input  wire clk,
    input  wire rst_n,
    output reg  clk_div
);

    // Fractional division: 3.5x (i.e., output period = 2/7 of input period)
    // Using a 7-cycle pattern with double-edge technique to realize half-integer division.
    localparam integer MUL2_DIV_CLK = 7;

    // Intermediate clocks (phase-shifted by half a clock period)
    reg div_a;
    reg div_b;

    // 3.5x division pattern over 7 input cycles:
    // One uneven period uses 4 source cycles, the other uses 3 source cycles.
    // We generate two phase-shifted versions and OR them to smooth the output.
    reg [2:0] cnt;

    // Combinational next-state for counter
    wire [2:0] cnt_next = (cnt == (MUL2_DIV_CLK-1)) ? 3'd0 : (cnt + 3'd1);

    // Update div_a/div_b on both edges to achieve half-integer behavior.
    // div_a is toggled at specific half-cycle boundaries; div_b is phase-shifted by half a cycle.
    always @(posedge clk or negedge rst_n) begin
        if (!rst_n) begin
            cnt    <= 3'd0;
            div_a  <= 1'b0;
            div_b  <= 1'b0;
            clk_div <= 1'b0;
        end else begin
            cnt <= cnt_next;
...
functional details 
[stdout]
Failed at          0: clk=1, clk_div=0 (expected           1)
Failed at          3: clk=0, clk_div=1 (expected           0)
Failed at          4: clk=1, clk_div=1 (expected           0)
Failed at          5: clk=0, clk_div=1 (expected           0)
Failed at          6: clk=1, clk_div=1 (expected           0)
Failed at         10: clk=1, clk_div=1 (expected           0)
Failed at         11: clk=0, clk_div=1 (expected           0)
Failed at         12: clk=1, clk_div=1 (expected           0)
Failed at         13: clk=0, clk_div=1 (expected           0)
Failed at         17: clk=0, clk_div=1 (expected           0)
Failed at         18: clk=1, clk_div=1 (expected           0)
Failed at         19: clk=0, clk_div=1 (expected           0)
=========== Test completed with          12/20 failures ===========
/workspace/banchmarks/rtllm/13_rtllm_miscellaneous/task_03/tb.v:27: $finish called at 130000 (1ps)
synthesis details 
[error]
None
outcome 
{
  "llm_ok": true,
  "extract_ok": true,
  "syntax_ok": true,
  "functional_ok": true,
  "openlane_ok": true,
  "syntax_required": true,
  "functional_required": true,
  "openlane_required": true,
  "final_success": true,
  "success": true
}
sample_2 run_20260427_102437_171676_163c0c ok ok ok ok ok success Full pipeline success
Open details
sample_dir: E:\Work\MIEM\VKR\Analyse\data\model_dataset\models\gpt-5-4-nano\rag_off\benchmarks\rtllm\tasks\rtllm__13_rtllm_miscellaneous__task_03\samples\run_20260427_102437_171676_163c0c__sample_2
generated.v preview 
module freq_divbyfrac (
    input  wire clk,
    input  wire rst_n,
    output wire clk_div
);
    // Fractional division: 3.5x (i.e., output frequency = input/3.5)
    // Using a 7-cycle pattern (MUL2_DIV_CLK = 7) and double-edge technique
    // to realize half-integer division with duty-cycle adjustment.
    localparam integer MUL2_DIV_CLK = 7;

    reg [2:0] cnt;                 // counts 0..6
    reg       div_a;              // intermediate phase A
    reg       div_b;              // intermediate phase B
    reg       div_a_d, div_b_d;  // delayed versions for half-cycle shift
    wire      div_a_or_div_b;

    // Generate two uneven-period intermediate clocks and phase-shift them
    // by half a source clock period using delayed versions.
    //
    // For 3.5 division with 7-cycle pattern:
    // - One intermediate clock is high for 4 cycles, low for 3 cycles.
    // - The other is phase-shifted by half a cycle (implemented via delayed taps).
    //
    // div_a is asserted for cnt in [0..3] (4 cycles), deasserted for [4..6] (3 cycles).
    // div_b is asserted for cnt in [0..2] (3 cycles), deasserted for [3..6] (4 cycles).
    always @(posedge clk or negedge rst_n) begin
        if (!rst_n) begin
            cnt      <= 3'd0;
            div_a    <= 1'b0;
            div_b    <= 1'b0;
            div_a_d  <= 1'b0;
            div_b_d  <= 1'b0;
...
functional details 
[stdout]
Failed at          3: clk=0, clk_div=1 (expected           0)
Failed at          4: clk=1, clk_div=1 (expected           0)
Failed at          5: clk=0, clk_div=1 (expected           0)
Failed at          6: clk=1, clk_div=1 (expected           0)
Failed at          8: clk=1, clk_div=0 (expected           1)
Failed at          9: clk=0, clk_div=0 (expected           1)
Failed at         17: clk=0, clk_div=1 (expected           0)
Failed at         18: clk=1, clk_div=1 (expected           0)
Failed at         19: clk=0, clk_div=1 (expected           0)
=========== Test completed with           9/20 failures ===========
/workspace/banchmarks/rtllm/13_rtllm_miscellaneous/task_03/tb.v:27: $finish called at 130000 (1ps)
synthesis details 
[error]
None
outcome 
{
  "llm_ok": true,
  "extract_ok": true,
  "syntax_ok": true,
  "functional_ok": true,
  "openlane_ok": true,
  "syntax_required": true,
  "functional_required": true,
  "openlane_required": true,
  "final_success": true,
  "success": true
}
sample_3 run_20260427_102437_171676_163c0c ok ok ok ok ok success Full pipeline success
Open details
sample_dir: E:\Work\MIEM\VKR\Analyse\data\model_dataset\models\gpt-5-4-nano\rag_off\benchmarks\rtllm\tasks\rtllm__13_rtllm_miscellaneous__task_03\samples\run_20260427_102437_171676_163c0c__sample_3
generated.v preview 
module freq_divbyfrac (
    input  wire clk,
    input  wire rst_n,
    output wire clk_div
);
    // Fractional divider for 3.5x (i.e., output frequency = input/3.5)
    // Using a 7-cycle pattern with double-edge technique (half-integer division).
    // Pattern: 4 cycles then 3 cycles (total 7).
    // Two phase-shifted intermediate clocks are OR-ed to smooth the output.

    localparam integer MUL2_DIV_CLK = 7; // total cycles in the 3.5x pattern

    reg [2:0] cnt;               // enough for 0..6
    reg       clk_a;            // intermediate phase A
    reg       clk_b;            // intermediate phase B

    // Generate intermediate clocks with uneven high/low durations:
    // For phase A: high for 4 cycles, low for 3 cycles (within the 7-cycle window)
    // For phase B: same but phase-shifted by half a source clock period.
    // The half-cycle shift is approximated by toggling on opposite edges.
    // We implement the half-cycle shift by updating clk_b on the opposite edge.
    always @(posedge clk or negedge rst_n) begin
        if (!rst_n) begin
            cnt   <= 3'd0;
            clk_a <= 1'b0;
        end else begin
            // Advance counter
            if (cnt == (MUL2_DIV_CLK-1))
                cnt <= 3'd0;
            else
                cnt <= cnt + 3'd1;
...
functional details 
[stdout]
Failed at          3: clk=0, clk_div=1 (expected           0)
Failed at          4: clk=1, clk_div=1 (expected           0)
Failed at          5: clk=0, clk_div=1 (expected           0)
Failed at          6: clk=1, clk_div=1 (expected           0)
Failed at          8: clk=1, clk_div=0 (expected           1)
Failed at          9: clk=0, clk_div=0 (expected           1)
Failed at         13: clk=0, clk_div=1 (expected           0)
Failed at         17: clk=0, clk_div=1 (expected           0)
Failed at         18: clk=1, clk_div=1 (expected           0)
Failed at         19: clk=0, clk_div=1 (expected           0)
=========== Test completed with          10/20 failures ===========
/workspace/banchmarks/rtllm/13_rtllm_miscellaneous/task_03/tb.v:27: $finish called at 130000 (1ps)
synthesis details 
[error]
None
outcome 
{
  "llm_ok": true,
  "extract_ok": true,
  "syntax_ok": true,
  "functional_ok": true,
  "openlane_ok": true,
  "syntax_required": true,
  "functional_required": true,
  "openlane_required": true,
  "final_success": true,
  "success": true
}
sample_4 run_20260427_102437_171676_163c0c ok ok ok ok ok success Full pipeline success
Open details
sample_dir: E:\Work\MIEM\VKR\Analyse\data\model_dataset\models\gpt-5-4-nano\rag_off\benchmarks\rtllm\tasks\rtllm__13_rtllm_miscellaneous__task_03\samples\run_20260427_102437_171676_163c0c__sample_4
generated.v preview 
module freq_divbyfrac (
    input  wire clk,
    input  wire rst_n,
    output wire clk_div
);

    // Fractional division target: 3.5x (i.e., output period = 2 * input period / 3.5 = 4/7 of input period)
    // Using a 7-cycle pattern with double-edge technique to realize half-integer division.
    localparam integer MUL2_DIV_CLK = 7; // 3.5x => half-integer => 7-cycle pattern

    reg [2:0] cnt; // enough for 0..6

    // Intermediate clocks (phase-shifted by half a source clock period)
    reg clk_a;
    reg clk_b;

    // Final output
    wire clk_div_w;

    assign clk_div_w = clk_a | clk_b;
    assign clk_div   = clk_div_w;

    // Generate two uneven half-cycle patterns:
    // For a 7-cycle pattern, use 4 and 3 source cycles to form the fractional timing.
    // Then create phase-shifted versions (half-cycle shift) by updating on opposite edges.
    //
    // clk_a updates on posedge clk:
    //   High for 4 cycles, low for 3 cycles (within the 7-cycle modulo).
    // clk_b updates on negedge clk:
    //   Same pattern but phase-shifted by half a source clock period.
    //
    // This OR combination yields a smoother uniform-period fractional output.
...
functional details 
[stdout]
Failed at          3: clk=0, clk_div=1 (expected           0)
Failed at          4: clk=1, clk_div=1 (expected           0)
Failed at          5: clk=0, clk_div=1 (expected           0)
Failed at          6: clk=1, clk_div=1 (expected           0)
Failed at          8: clk=1, clk_div=0 (expected           1)
Failed at          9: clk=0, clk_div=0 (expected           1)
Failed at         13: clk=0, clk_div=1 (expected           0)
Failed at         17: clk=0, clk_div=1 (expected           0)
Failed at         18: clk=1, clk_div=1 (expected           0)
Failed at         19: clk=0, clk_div=1 (expected           0)
=========== Test completed with          10/20 failures ===========
/workspace/banchmarks/rtllm/13_rtllm_miscellaneous/task_03/tb.v:27: $finish called at 130000 (1ps)
synthesis details 
[error]
None
outcome 
{
  "llm_ok": true,
  "extract_ok": true,
  "syntax_ok": true,
  "functional_ok": true,
  "openlane_ok": true,
  "syntax_required": true,
  "functional_required": true,
  "openlane_required": true,
  "final_success": true,
  "success": true
}
sample_5 run_20260427_102437_171676_163c0c ok ok ok ok ok success Full pipeline success
Open details
sample_dir: E:\Work\MIEM\VKR\Analyse\data\model_dataset\models\gpt-5-4-nano\rag_off\benchmarks\rtllm\tasks\rtllm__13_rtllm_miscellaneous__task_03\samples\run_20260427_102437_171676_163c0c__sample_5
generated.v preview 
module freq_divbyfrac (
    input  wire clk,
    input  wire rst_n,
    output wire clk_div
);
    // Fractional division: 3.5x (i.e., output period = 2/7 of input period)
    // Using a 7-cycle pattern with double-edge technique to realize half-integer division.
    localparam integer MUL2_DIV_CLK = 7;

    reg [2:0] cnt;                 // enough for 0..6
    reg       div_a;              // intermediate phase A
    reg       div_b;              // intermediate phase B

    // Generate two uneven-period divided clocks and phase-shift them by half a cycle.
    // div_a: high for 4 input cycles, low for 3 input cycles (within the 7-cycle pattern)
    // div_b: phase-shifted by half a cycle using double-edge technique (implemented via negedge FF)
    always @(posedge clk or negedge rst_n) begin
        if (!rst_n) begin
            cnt   <= 3'd0;
            div_a <= 1'b0;
        end else begin
            if (cnt == (MUL2_DIV_CLK-1))
                cnt <= 3'd0;
            else
                cnt <= cnt + 3'd1;

            // div_a high when cnt in [0..3] (4 cycles), low when cnt in [4..6] (3 cycles)
            if (cnt <= 3'd3)
                div_a <= 1'b1;
            else
                div_a <= 1'b0;
        end
...
functional details 
[stdout]
Failed at          3: clk=0, clk_div=1 (expected           0)
Failed at          4: clk=1, clk_div=1 (expected           0)
Failed at          5: clk=0, clk_div=1 (expected           0)
Failed at          6: clk=1, clk_div=1 (expected           0)
Failed at          8: clk=1, clk_div=0 (expected           1)
Failed at          9: clk=0, clk_div=0 (expected           1)
Failed at         13: clk=0, clk_div=1 (expected           0)
Failed at         17: clk=0, clk_div=1 (expected           0)
Failed at         18: clk=1, clk_div=1 (expected           0)
Failed at         19: clk=0, clk_div=1 (expected           0)
=========== Test completed with          10/20 failures ===========
/workspace/banchmarks/rtllm/13_rtllm_miscellaneous/task_03/tb.v:27: $finish called at 130000 (1ps)
synthesis details 
[error]
None
outcome 
{
  "llm_ok": true,
  "extract_ok": true,
  "syntax_ok": true,
  "functional_ok": true,
  "openlane_ok": true,
  "syntax_required": true,
  "functional_required": true,
  "openlane_required": true,
  "final_success": true,
  "success": true
}
sample_6 run_20260427_102437_171676_163c0c ok ok ok ok ok success Full pipeline success
Open details
sample_dir: E:\Work\MIEM\VKR\Analyse\data\model_dataset\models\gpt-5-4-nano\rag_off\benchmarks\rtllm\tasks\rtllm__13_rtllm_miscellaneous__task_03\samples\run_20260427_102437_171676_163c0c__sample_6
generated.v preview 
module freq_divbyfrac (
    input  wire clk,
    input  wire rst_n,
    output wire clk_div
);

    // Fractional division target: 3.5x (i.e., output period = 7 input cycles / 2)
    // Using double-edge technique to realize half-integer division.
    localparam integer MUL2_DIV_CLK = 7; // total input cycles for the 3.5x pattern

    // Counter for 0..6
    reg [2:0] cnt;

    // Two phase-shifted intermediate clocks (registered on clk)
    reg clk_a;
    reg clk_b;

    // Combinational OR for final output
    assign clk_div = clk_a | clk_b;

    // Generate uneven half-periods: 4 cycles then 3 cycles (total 7)
    // Use double-edge style by producing two phase-shifted versions and OR-ing them.
    // Phase shift by half a clk period is approximated by offsetting the toggle points.
    always @(posedge clk or negedge rst_n) begin
        if (!rst_n) begin
            cnt   <= 3'd0;
            clk_a <= 1'b0;
            clk_b <= 1'b0;
        end else begin
            // Advance counter
            if (cnt == (MUL2_DIV_CLK - 1))
                cnt <= 3'd0;
...
functional details 
[stdout]
Failed at          3: clk=0, clk_div=1 (expected           0)
Failed at          4: clk=1, clk_div=1 (expected           0)
Failed at          5: clk=0, clk_div=1 (expected           0)
Failed at          6: clk=1, clk_div=1 (expected           0)
Failed at         10: clk=1, clk_div=1 (expected           0)
Failed at         11: clk=0, clk_div=1 (expected           0)
Failed at         17: clk=0, clk_div=1 (expected           0)
Failed at         18: clk=1, clk_div=1 (expected           0)
Failed at         19: clk=0, clk_div=1 (expected           0)
=========== Test completed with           9/20 failures ===========
/workspace/banchmarks/rtllm/13_rtllm_miscellaneous/task_03/tb.v:27: $finish called at 130000 (1ps)
synthesis details 
[error]
None
outcome 
{
  "llm_ok": true,
  "extract_ok": true,
  "syntax_ok": true,
  "functional_ok": true,
  "openlane_ok": true,
  "syntax_required": true,
  "functional_required": true,
  "openlane_required": true,
  "final_success": true,
  "success": true
}
sample_7 run_20260427_102437_171676_163c0c ok ok ok ok ok success Full pipeline success
Open details
sample_dir: E:\Work\MIEM\VKR\Analyse\data\model_dataset\models\gpt-5-4-nano\rag_off\benchmarks\rtllm\tasks\rtllm__13_rtllm_miscellaneous__task_03\samples\run_20260427_102437_171676_163c0c__sample_7
generated.v preview 
module freq_divbyfrac (
    input  wire clk,
    input  wire rst_n,
    output wire clk_div
);
    // Fractional divider for 3.5x using double-edge technique.
    // Target: divide by 7/2 => output period = 3.5 input cycles.
    // Implemented as OR of two phase-shifted half-cycle versions of an uneven divider.
    //
    // For 3.5 division:
    //   MUL2_DIV_CLK = 7
    //   Uneven half-cycles: 4 and 3 input cycles
    //   Use two intermediate clocks phase-shifted by 1/2 input period.

    localparam integer MUL2_DIV_CLK = 7;

    reg [2:0] cnt;                 // enough for 0..6
    reg       div_a;              // intermediate clock A (phase 0)
    reg       div_b;              // intermediate clock B (phase 180 degrees)

    // Double-edge generation: update div_a on posedge, div_b on negedge.
    // Both use the same uneven cycle pattern but are inherently phase-shifted.
    always @(posedge clk or negedge rst_n) begin
        if (!rst_n) begin
            cnt   <= 3'd0;
            div_a <= 1'b0;
        end else begin
            // Uneven high duration: 4 cycles, low duration: 3 cycles (total 7)
            // div_a is asserted for cnt in [0..3], deasserted for cnt in [4..6]
            div_a <= (cnt < 3'd4);
            if (cnt == (MUL2_DIV_CLK-1)) begin
                cnt <= 3'd0;
...
functional details 
[stdout]
Failed at          3: clk=0, clk_div=1 (expected           0)
Failed at          4: clk=1, clk_div=1 (expected           0)
Failed at          5: clk=0, clk_div=1 (expected           0)
Failed at          6: clk=1, clk_div=1 (expected           0)
Failed at          8: clk=1, clk_div=0 (expected           1)
Failed at          9: clk=0, clk_div=0 (expected           1)
Failed at         13: clk=0, clk_div=1 (expected           0)
Failed at         17: clk=0, clk_div=1 (expected           0)
Failed at         18: clk=1, clk_div=1 (expected           0)
Failed at         19: clk=0, clk_div=1 (expected           0)
=========== Test completed with          10/20 failures ===========
/workspace/banchmarks/rtllm/13_rtllm_miscellaneous/task_03/tb.v:27: $finish called at 130000 (1ps)
synthesis details 
[error]
None
outcome 
{
  "llm_ok": true,
  "extract_ok": true,
  "syntax_ok": true,
  "functional_ok": true,
  "openlane_ok": true,
  "syntax_required": true,
  "functional_required": true,
  "openlane_required": true,
  "final_success": true,
  "success": true
}
sample_8 run_20260427_102437_171676_163c0c ok ok ok ok ok success Full pipeline success
Open details
sample_dir: E:\Work\MIEM\VKR\Analyse\data\model_dataset\models\gpt-5-4-nano\rag_off\benchmarks\rtllm\tasks\rtllm__13_rtllm_miscellaneous__task_03\samples\run_20260427_102437_171676_163c0c__sample_8
generated.v preview 
module freq_divbyfrac (
    input  wire clk,
    input  wire rst_n,
    output wire clk_div
);
    // Fractional divider for 3.5x using double-edge technique.
    // Target: divide by 7/2 => output period = 7 input cycles / 2.
    // Implement with two uneven half-cycles (4 and 3 input cycles) and
    // phase-shifted versions combined via OR.
    //
    // MUL2_DIV_CLK = 7 (input cycles for full 2*output half-period)
    localparam integer MUL2_DIV_CLK = 7;

    // For 3.5x: half-periods alternate between 4 and 3 input cycles.
    localparam integer HALF0 = 4;
    localparam integer HALF1 = 3;

    // Counter for generating the two intermediate clocks.
    // We count input cycles within a 7-cycle pattern.
    reg [2:0] cnt;

    // Intermediate clocks (phase-shifted by half input cycle).
    reg clk_a;
    reg clk_b;

    // Final output
    assign clk_div = clk_a | clk_b;

    // Generate clk_a and clk_b using uneven cycle lengths and half-cycle phase shift.
    // clk_a: toggles high for HALF0 cycles then low for HALF1 cycles (within 7-cycle pattern).
    // clk_b: same pattern but phase-shifted by half input cycle (implemented by offsetting
    //         the transition points by one cycle relative to clk_a).
...
functional details 
[stdout]
Failed at          3: clk=0, clk_div=1 (expected           0)
Failed at          4: clk=1, clk_div=1 (expected           0)
Failed at          5: clk=0, clk_div=1 (expected           0)
Failed at          6: clk=1, clk_div=1 (expected           0)
Failed at          8: clk=1, clk_div=0 (expected           1)
Failed at          9: clk=0, clk_div=0 (expected           1)
Failed at         12: clk=1, clk_div=1 (expected           0)
Failed at         13: clk=0, clk_div=1 (expected           0)
Failed at         17: clk=0, clk_div=1 (expected           0)
Failed at         18: clk=1, clk_div=1 (expected           0)
Failed at         19: clk=0, clk_div=1 (expected           0)
=========== Test completed with          11/20 failures ===========
/workspace/banchmarks/rtllm/13_rtllm_miscellaneous/task_03/tb.v:27: $finish called at 130000 (1ps)
synthesis details 
[error]
None
outcome 
{
  "llm_ok": true,
  "extract_ok": true,
  "syntax_ok": true,
  "functional_ok": true,
  "openlane_ok": true,
  "syntax_required": true,
  "functional_required": true,
  "openlane_required": true,
  "final_success": true,
  "success": true
}
sample_9 run_20260427_102437_171676_163c0c ok ok ok ok ok success Full pipeline success
Open details
sample_dir: E:\Work\MIEM\VKR\Analyse\data\model_dataset\models\gpt-5-4-nano\rag_off\benchmarks\rtllm\tasks\rtllm__13_rtllm_miscellaneous__task_03\samples\run_20260427_102437_171676_163c0c__sample_9
generated.v preview 
module freq_divbyfrac (
    input  wire clk,
    input  wire rst_n,
    output wire clk_div
);

    // Fractional division target: 3.5x (i.e., output period = 2 * input period / 3.5 = 4/7 input periods)
    // Using a 7-cycle pattern with double-edge technique to realize half-integer division.
    localparam integer MUL2_DIV_CLK = 7;

    reg [2:0] cnt;                 // counts 0..6
    reg       div_a;              // intermediate phase A
    reg       div_b;              // intermediate phase B

    // Generate two uneven half-cycle patterns and phase-shift them by half a source clock.
    // For a 7-cycle pattern, the "high" durations are 4 and 3 source cycles alternately.
    // div_a and div_b are offset by half a source clock using double-edge sampling.
    always @(posedge clk or negedge rst_n) begin
        if (!rst_n) begin
            cnt   <= 3'd0;
            div_a <= 1'b0;
        end else begin
            if (cnt == (MUL2_DIV_CLK-1))
                cnt <= 3'd0;
            else
                cnt <= cnt + 3'd1;

            // div_a: high for 4 of 7 cycles (cnt = 0..3), low for 3 (cnt = 4..6)
            if (cnt < 3'd4)
                div_a <= 1'b1;
            else
                div_a <= 1'b0;
...
functional details 
[stdout]
Failed at          3: clk=0, clk_div=1 (expected           0)
Failed at          4: clk=1, clk_div=1 (expected           0)
Failed at          5: clk=0, clk_div=1 (expected           0)
Failed at          6: clk=1, clk_div=1 (expected           0)
Failed at          8: clk=1, clk_div=0 (expected           1)
Failed at          9: clk=0, clk_div=0 (expected           1)
Failed at         13: clk=0, clk_div=1 (expected           0)
Failed at         17: clk=0, clk_div=1 (expected           0)
Failed at         18: clk=1, clk_div=1 (expected           0)
Failed at         19: clk=0, clk_div=1 (expected           0)
=========== Test completed with          10/20 failures ===========
/workspace/banchmarks/rtllm/13_rtllm_miscellaneous/task_03/tb.v:27: $finish called at 130000 (1ps)
synthesis details 
[error]
None
outcome 
{
  "llm_ok": true,
  "extract_ok": true,
  "syntax_ok": true,
  "functional_ok": true,
  "openlane_ok": true,
  "syntax_required": true,
  "functional_required": true,
  "openlane_required": true,
  "final_success": true,
  "success": true
}
sample_10 run_20260427_102437_171676_163c0c ok ok ok ok ok success Full pipeline success
Open details
sample_dir: E:\Work\MIEM\VKR\Analyse\data\model_dataset\models\gpt-5-4-nano\rag_off\benchmarks\rtllm\tasks\rtllm__13_rtllm_miscellaneous__task_03\samples\run_20260427_102437_171676_163c0c__sample_10
generated.v preview 
module freq_divbyfrac (
    input  wire clk,
    input  wire rst_n,
    output wire clk_div
);

    // Fractional division: 3.5x (i.e., output period = 7 input cycles / 2)
    // Using double-edge technique to realize half-integer division.
    localparam integer MUL2_DIV_CLK = 7; // total input cycles for the 3.5x pattern

    // Intermediate clocks (phase-shifted by half a source clock)
    reg clk_div_a;
    reg clk_div_b;

    // Counter for uneven periods (4 and 3 input cycles)
    reg [$clog2(MUL2_DIV_CLK)-1:0] cnt;
    reg phase_sel; // selects which uneven segment we are in

    // Generate a 50% duty-ish intermediate clock using uneven cycle lengths:
    // For 7 cycles total: high for 4 cycles, low for 3 cycles (or vice versa).
    // Then create a half-cycle phase-shifted version and OR them.
    always @(posedge clk or negedge rst_n) begin
        if (!rst_n) begin
            cnt        <= {($clog2(MUL2_DIV_CLK)){1'b0}};
            phase_sel  <= 1'b0;
            clk_div_a  <= 1'b0;
        end else begin
            // Determine clk_div_a level based on cnt and phase_sel.
            // We implement a repeating pattern over 7 cycles:
            // clk_div_a high for 4 cycles, low for 3 cycles.
            // cnt counts 0..6.
            if (cnt == (MUL2_DIV_CLK-1)) begin
...
functional details 
[stdout]
Failed at          3: clk=0, clk_div=1 (expected           0)
Failed at          4: clk=1, clk_div=1 (expected           0)
Failed at          5: clk=0, clk_div=1 (expected           0)
Failed at          6: clk=1, clk_div=1 (expected           0)
Failed at          8: clk=1, clk_div=0 (expected           1)
Failed at          9: clk=0, clk_div=0 (expected           1)
Failed at         13: clk=0, clk_div=1 (expected           0)
Failed at         17: clk=0, clk_div=1 (expected           0)
Failed at         18: clk=1, clk_div=1 (expected           0)
Failed at         19: clk=0, clk_div=1 (expected           0)
=========== Test completed with          10/20 failures ===========
/workspace/banchmarks/rtllm/13_rtllm_miscellaneous/task_03/tb.v:27: $finish called at 130000 (1ps)
synthesis details 
[error]
None
outcome 
{
  "llm_ok": true,
  "extract_ok": true,
  "syntax_ok": true,
  "functional_ok": true,
  "openlane_ok": true,
  "syntax_required": true,
  "functional_required": true,
  "openlane_required": true,
  "final_success": true,
  "success": true
}