tests/test.sh exit code (0 → resolved); the classification below is post-hoc and cannot change it.module TopModule (
input clk,
input rst_n,
input start,
input [127:0] block_in,
input [127:0] round_key0,
input [3:0] num_rounds,
input reseed,
input [3:0] reseed_round,
output reg ready,
output reg result_valid,
output reg [127:0] block_out
);
reg busy;
reg [127:0] state;
reg [127:0] round_key_reg;
reg [3:0] num_rounds_reg;
reg [3:0] round_index;
reg [4:0] slot;
reg [7:0] fb;
integer col, sub, pos;
reg [7:0] oldb, tmpb, newb;
reg [127:0] new_state;
reg [7:0] next_fb;
always @(posedge clk) begin
if (!rst_n) begin
ready <= 1'b1;
result_valid <= 1'b0;
busy <= 1'b0;
block_out <= 128'b0;
end else begin
if (!busy) begin
if (start && ready) begin
busy <= 1'b1;
ready <= 1'b0;
result_valid <= 1'b0;
state <= block_in;
round_key_reg <= round_key0;
num_rounds_reg <= num_rounds;
round_index <= 4'd0;
slot <= 5'd0;
fb <= 8'd0; // round 0 start feedback = {4'b0, round_index=0}
end
end else begin
if (slot < 5'd16) begin
// byte slot
col = slot / 4;
sub = slot % 4;
pos = 32*col + 24 - 8*sub;
oldb = state[pos +: 8];
tmpb = oldb ^ fb;
newb = {tmpb[6:0], tmpb[7]} ^ 8'h63;
state[pos +: 8] <= newb;
fb <= newb;
slot <= slot + 5'd1;
end else begin
// key-mix slot
new_state = state ^ round_key_reg;
if ((round_index + 4'd1) == num_rounds_reg) begin
block_out <= new_state;
result_valid <= 1'b1;
ready <= 1'b1;
busy <= 1'b0;
end else begin
// fix next round's start feedback from reseed sampled here
next_fb = reseed ? {4'b0, reseed_round}
: {4'b0, (round_index + 4'd1)};
state <= new_state;
round_index <= round_index + 4'd1;
fb <= next_fb;
slot <= 5'd0;
end
end
end
end
end
endmodule
Compile-check the Verilog
(iverilog -g2012 -o /tmp/dut_test dut.sv 2>&1 && echo "COMPILE OK") || echo "iverilog not available or error"
COMPILE OK [stdout] COMPILE OK
Run smoke test simulation
cat > /tmp/tb.sv <<'EOF'
module tb;
reg clk=0, rst_n=0, start=0, reseed=0;
reg [127:0] block_in=0, round_key0=0;
reg [3:0] num_rounds=1, reseed_round=0;
wire ready, result_valid; wire [127:0] block_out;
TopModule d(.clk(clk),.rst_n(rst_n),.start(start),.block_in(block_in),
.round_key0(round_key0),.num_rounds(num_rounds),.reseed(reseed),
.reseed_round(reseed_round),.ready(ready),.result_valid(result_valid),.block_out(block_out));
always #5 clk=~clk;
integer cyc=0;
initial begin
@(negedge clk); rst_n=1;
@(negedge clk); start=1; num_rounds=1; block_in=128'h0;
@(negedge clk); start=0;
wait(result_valid);
@(negedge clk);
$display("num_rounds=1 block=0 key=0 -> block_out=%h ready=%b rv=%b",block_out,ready,result_valid);
// expected: each byte: rol1(byte^fb)^0x63. slot0 fb=0: byte0=0 -> rol1(0)^63=63; then chain
$finish;
end
endmodule
EOF
iverilog -g2012 -o /tmp/sim /app/dut.sv /tmp/tb.sv && vvp /tmp/simnum_rounds=1 block=0 key=0 -> block_out=0569b10063a528330569b10063a52833 ready=1 rv=1 /tmp/tb.sv:19: $finish called at 200 (1s) [stdout] num_rounds=1 block=0 key=0 -> block_out=0569b10063a528330569b10063a52833 ready=1 rv=1 /tmp/tb.sv:19: $finish called at 200 (1s)
No file changes, the agent left the workspace untouched.
TEST dut_present: PASS (/app/dut.sv exists)
TEST dut_forbidden: PASS (no forbidden constructs)
TEST dut_elaborates: PASS (DUT elaborates standalone)
TEST dut_compiles: PASS (compiled with held-back reference/testbench)
TEST simulation_completed: PASS (Mismatches: 794 in 16537 samples)
TEST reference_equivalence: FAIL (794 mismatches in 16537 samples)
{"score": 0.000000, "results_file": "/tmp/h2t-grader-home.eeqDNy/runtime/cb_verifier_313-21506-18938-32370_313/results.jsonl"}Reproduce this trial: git checkout 2f94510 && PYTHONPATH=src python3 scripts/build_site.py , then open trial/trial_a93a02f5da084f5a. Re-running the agent live requires EVAL_PLATFORM_ENABLE_OAUTH_SMOKE=1 and is non-deterministic.
Trial trial_a93a02f5da084f5a · verifier authoritative; classifier explanatory.