[log] route {'task_type': 'optimize', 'correctness_stages': ['csim'], 'initial_level': 1, 'budget': 40, 'token_mode': 'full'}
[log] pre_csim_review {'attempt': 1}
[log] kb_search {'query': [], 'hits': 0, 'hit_ids': []}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 40}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 40}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 40}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 40}
[log] mechanical_review {'passed': True, 'issues': []}
[log] heartbeat {'stage': 'llm', 'age_s': 2.5, 'stale': False, 'credit_remaining': 40}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 40}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 40}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 40}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 40}
[log] review {'verdict': 'reject', 'retry': 0, 'issues': 'FAIL\n- **Pragma hazard**: `#pragma HLS PIPELINE` on a loop containing a reduction variable (`result +=`) creates a loop-carried dependency. This prevents achieving II=1, defeats the pipelining intent,'}
[log] heartbeat {'stage': 'llm', 'age_s': 5.9, 'stale': False, 'credit_remaining': 40}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 40}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 40}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 40}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 40}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 40}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 40}
[log] mechanical_review {'passed': True, 'issues': []}
[log] heartbeat {'stage': 'llm', 'age_s': 4.0, 'stale': False, 'credit_remaining': 40}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 40}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 40}
[log] review {'verdict': 'reject', 'retry': 1, 'issues': 'FAIL\n- **Pragma Conflict:** `#pragma HLS PIPELINE` and `#pragma HLS UNROLL` are applied to the same loop. HLS explicitly forbids combining these two pragmas on a single loop; it will cause a synthesis'}
[log] pre_csim_fix_applied {'note': 'LLM found issues before first csim'}
[log] heartbeat {'stage': 'csim', 'age_s': 6.0, 'stale': False, 'credit_remaining': 40}
[log] tool_result {'kind': 'csim', 'phase': 'pass', 'ok': True, 'rc': 0, 'elapsed_s': 10.2, 'credit_spent': 1, 'log': ''}
[log] phase_exit {'phase': 'correctness', 'result': 'ok', 'best_level': 1}
[log] heartbeat {'stage': 'synth', 'age_s': 5.8, 'stale': False, 'credit_remaining': 39}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 39}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 39}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 39}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 39}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 39}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 39}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 39}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 39}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 39}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 39}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 39}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 39}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 39}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 39}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 39}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 39}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 39}
[log] tool_result {'kind': 'synth', 'phase': 'pass', 'ok': True, 'elapsed_s': 185.3, 'credit_spent': 5, 'log': ''}
[log] checkpoint {'old': 1, 'new': 2, 'latency': 513, 'reason': 'synth_ok'}
[log] phase_exit {'phase': 'synth', 'result': 'ok', 'latency': 513}
[log] phase_enter {'phase': 'optimize', 'best_level': 2, 'best_latency': 513}
[log] heartbeat {'stage': 'llm', 'age_s': 0.5, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 35}
[log] llm_call {'purpose': 'extract_brief', 'chars': 1070, 'prompt_tokens': 691, 'completion_tokens': 2736, 'reasoning_tokens': 2513, 'model': 'qwen3.6-27b'}
[log] design_brief {'chars': 1070}
[log] heartbeat {'stage': 'llm', 'age_s': 0.8, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 35}
[log] llm_call {'purpose': 'propose_strategies', 'round': 1, 'count': 3, 'raw_head': '', 'prompt_tokens': 1003, 'completion_tokens': 5273, 'reasoning_tokens': 4731, 'model': 'qwen3.6-27b'}
[log] heartbeat {'stage': 'llm', 'age_s': 3.7, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 0.7, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 35}
[log] llm_call {'purpose': 'select_strategies', 'round': 1, 'prompt_tokens': 1267, 'completion_tokens': 3059, 'reasoning_tokens': 2944, 'model': 'qwen3.6-27b'}
[log] strategy_select {'round': 1, 'indices': [0], 'picked': ['Full Unroll & Register Partitioning'], 'all': ['Full Unroll & Register Partitioning', 'Partial Unroll with Explicit II=1 & Reduction Hints', 'AXI4Master Burst Interface Optimization'], 'reason': 'Full unroll directly synthesizes a parallel reduction tree, eliminating the sequential accumulator bottleneck and achieving near-minimal latency without conflicting pragmas.', 'rejected': [{'id': 2, 'name': 'Partial Unroll with Explicit II=1 & Reduction Hints', 'why': 'Reduction loops have a true dependency on the accumulator; partial unroll cannot achieve II=1, and DEPENDENCE hints are unnecessary and risk synthesis failures.'}], 'fallback': False}
[log] heartbeat {'stage': 'llm', 'age_s': 1.8, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 35}
[log] llm_call {'purpose': 'apply_strategies', 'strategies': 'Full Unroll & Register Partitioning', 'retry': 0, 'prompt_tokens': 1024, 'completion_tokens': 2524, 'reasoning_tokens': 2409, 'model': 'qwen3.6-27b'}
[log] mechanical_review {'passed': True, 'issues': []}
[log] heartbeat {'stage': 'llm', 'age_s': 5.4, 'stale': False, 'credit_remaining': 35}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 35}
[log] review {'verdict': 'pass', 'retry': 0, 'issues': 'PASS'}
[log] heartbeat {'stage': 'csim', 'age_s': 5.2, 'stale': False, 'credit_remaining': 35}
[log] tool_result {'kind': 'csim', 'phase': 'pass', 'ok': True, 'rc': 0, 'elapsed_s': 10.1, 'credit_spent': 6, 'log': ''}
[log] heartbeat {'stage': 'synth', 'age_s': 5.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 34}
[log] tool_result {'kind': 'synth', 'phase': 'pass', 'ok': True, 'elapsed_s': 269.1, 'credit_spent': 10, 'log': ''}
[log] optimize_discard {'round': 1, 'reason': 'no_improvement', 'best_latency': 513, 'cand_latency': 1027}
[log] optimize_stop {'reason': 'no_improvement', 'best_latency': 513}
[log] phase_exit {'phase': 'optimize', 'result': 'ok', 'best_level': 2, 'best_latency': 513}
[log] submit {'final_level': 2, 'final_latency': 513, 'credit_spent': 10}
=== Task dotProduct_optimize [optimize, difficulty 3] ===
    budget: 40 credits | backend: deepseek

qwen3.6-27b 10 calls | prompt=7656 completion=30802 (reasoning=29205) total=38458

--- metered tool transcript ---
  #1  [csim] pass (rc=0, 10.2s)   [spent 1/40]
  #2  [synth] pass (rc=0, 185.3s) | latency(worst)=513 cyc  II=514  clk~3.17ns  LUT=76450 FF=16986 DSP=4 BRAM=0 URAM=0   [spent 5/40]
  #3  [csim] pass (rc=0, 10.1s)   [spent 6/40]
  #4  [synth] pass (rc=0, 269.1s) | latency(worst)=1027 cyc  II=1025  clk~3.17ns  LUT=5542 FF=141 DSP=2 BRAM=0 URAM=0   [spent 10/40]
  budget 10/40 credits spent (csimx2, synthx2)

=== Grading (hidden testbench + PPA, uncharged) ===
=== Scorecard: dotProduct_optimize (difficulty 3) ===
  functional (hidden TB): PASS
  synthesizable         : PASS
  baseline latency      : 1027 cyc
  candidate latency     : 513 cyc
  acceleration          : 2.00x  (opt=True)
  candidate resources   : LUT=76450 FF=16986 DSP=4 BRAM=0
  SCORE                 : 2.325

recent scores (dotProduct_optimize):
  2026-07-25 22:38  SCORE 2.325  lat=513  credits=10  tokens=38458

final kernel -> /home/admin/fpga-agent/runs/qwen3.6-27b/dotProduct_optimize/final_dotProduct.cpp
