[log] route {'task_type': 'optimize', 'correctness_stages': ['csim'], 'initial_level': 1, 'budget': 60, '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': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] mechanical_review {'passed': True, 'issues': []}
[log] heartbeat {'stage': 'llm', 'age_s': 6.7, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] review {'verdict': 'reject', 'retry': 0, 'issues': 'FAIL\n- `#pragma HLS ARRAY_PARTITION variable=B dim=0 complete`: HLS array dimensions are strictly 1-indexed. `dim=0` is invalid and will cause a synthesis error. Should be `dim=1` (rows) to match the '}
[log] heartbeat {'stage': 'llm', 'age_s': 3.2, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] mechanical_review {'passed': True, 'issues': []}
[log] heartbeat {'stage': 'llm', 'age_s': 8.1, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 60}
[log] review {'verdict': 'reject', 'retry': 1, 'issues': 'FAIL\n\n- **Pragma hazard**: `#pragma HLS PIPELINE` on the inner `k` loop is invalid. The loop contains a loop-carried dependency (`acc += ...`), which HLS cannot pipeline. This will trigger synthesis e'}
[log] pre_csim_fix_applied {'note': 'LLM found issues before first csim'}
[log] heartbeat {'stage': 'csim', 'age_s': 6.4, 'stale': False, 'credit_remaining': 60}
[log] tool_result {'kind': 'csim', 'phase': 'pass', 'ok': True, 'rc': 0, 'elapsed_s': 6.9, 'credit_spent': 1, 'log': ''}
[log] phase_exit {'phase': 'correctness', 'result': 'ok', 'best_level': 1}
[log] heartbeat {'stage': 'synth', 'age_s': 9.5, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 59}
[log] tool_result {'kind': 'synth', 'phase': 'pass', 'ok': True, 'elapsed_s': 32.2, 'credit_spent': 5, 'log': ''}
[log] checkpoint {'old': 1, 'new': 2, 'latency': 1071, 'reason': 'synth_ok'}
[log] phase_exit {'phase': 'synth', 'result': 'ok', 'latency': 1071}
[log] phase_enter {'phase': 'optimize', 'best_level': 2, 'best_latency': 1071}
[log] heartbeat {'stage': 'llm', 'age_s': 7.3, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] llm_call {'purpose': 'extract_brief', 'chars': 1027, 'prompt_tokens': 825, 'completion_tokens': 2394, 'reasoning_tokens': 2155, 'model': 'qwen3.6-27b'}
[log] design_brief {'chars': 1027}
[log] heartbeat {'stage': 'llm', 'age_s': 5.8, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] llm_call {'purpose': 'propose_strategies', 'round': 1, 'count': 3, 'raw_head': '', 'prompt_tokens': 1158, 'completion_tokens': 5452, 'reasoning_tokens': 4969, 'model': 'qwen3.6-27b'}
[log] heartbeat {'stage': 'llm', 'age_s': 0.3, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] llm_call {'purpose': 'select_strategies', 'round': 1, 'prompt_tokens': 1237, 'completion_tokens': 2330, 'reasoning_tokens': 2214, 'model': 'qwen3.6-27b'}
[log] strategy_select {'round': 1, 'indices': [0, 1, 2], 'picked': ['Complete k-loop unroll', 'Pipeline j-loop', 'Partition B on dim=2'], 'all': ['Complete k-loop unroll', 'Pipeline j-loop', 'Partition B on dim=2'], 'reason': 'All three are synergistic and non-conflicting: k-unroll minimizes inner-loop latency, j-pipeline enables column concurrency, and B-dim2 partition resolves resulting memory conflicts without violating ', 'rejected': [], 'fallback': False}
[log] heartbeat {'stage': 'llm', 'age_s': 3.1, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] llm_call {'purpose': 'apply_strategies', 'strategies': 'Complete k-loop unroll+Pipeline j-loop+Partition B on dim=2', 'retry': 0, 'prompt_tokens': 1363, 'completion_tokens': 5347, 'reasoning_tokens': 5148, 'model': 'qwen3.6-27b'}
[log] mechanical_review {'passed': True, 'issues': []}
[log] heartbeat {'stage': 'llm', 'age_s': 7.2, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 55}
[log] review {'verdict': 'pass', 'retry': 0, 'issues': 'PASS'}
[log] heartbeat {'stage': 'csim', 'age_s': 6.6, 'stale': False, 'credit_remaining': 55}
[log] tool_result {'kind': 'csim', 'phase': 'pass', 'ok': True, 'rc': 0, 'elapsed_s': 6.9, 'credit_spent': 6, 'log': ''}
[log] heartbeat {'stage': 'synth', 'age_s': 9.6, 'stale': False, 'credit_remaining': 54}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 54}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 54}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 54}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 54}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 54}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 54}
[log] heartbeat {'stage': 'synth', 'age_s': 10.0, 'stale': False, 'credit_remaining': 54}
[log] tool_result {'kind': 'synth', 'phase': 'pass', 'ok': True, 'elapsed_s': 82.9, 'credit_spent': 10, 'log': ''}
[log] checkpoint {'old': 2, 'new': 2, 'old_latency': 1071, 'new_latency': 78, 'reason': 'optimize_improve'}
[log] heartbeat {'stage': 'llm', 'age_s': 6.7, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'llm', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] llm_call {'purpose': 'propose_strategies', 'round': 2, 'count': 0, 'raw_head': '">```json { "', 'prompt_tokens': 1077, 'completion_tokens': 6078, 'reasoning_tokens': 6069, 'model': 'qwen3.6-27b'}
[log] optimize_stop {'reason': 'no_strategy'}
[log] phase_exit {'phase': 'optimize', 'result': 'ok', 'best_level': 2, 'best_latency': 78}
[log] heartbeat {'stage': 'cosim', 'age_s': 8.4, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] heartbeat {'stage': 'cosim', 'age_s': 10.0, 'stale': False, 'credit_remaining': 50}
[log] tool_result {'kind': 'cosim', 'phase': 'pass', 'ok': True, 'elapsed_s': 443.0, 'credit_spent': 30, 'log': ''}
[log] cosim_recheck {'result': 'pass'}
[log] submit {'final_level': 2, 'final_latency': 78, 'credit_spent': 30}
=== Task matmul_optimize [optimize, difficulty 3] ===
    budget: 60 credits | backend: deepseek

qwen3.6-27b 10 calls | prompt=8522 completion=46004 (reasoning=44255) total=54526

--- metered tool transcript ---
  #1  [csim] pass (rc=0, 6.9s)   [spent 1/60]
  #2  [synth] pass (rc=0, 32.2s) | latency(worst)=1071 cyc  II=1072  clk~2.976ns  LUT=19580 FF=77707 DSP=158 BRAM=0 URAM=0   [spent 5/60]
  #3  [csim] pass (rc=0, 6.9s)   [spent 6/60]
  #4  [synth] pass (rc=0, 82.9s) | latency(worst)=78 cyc  II=79  clk~3.363ns  LUT=313401 FF=540407 DSP=5056 BRAM=0 URAM=0   [spent 10/60]
  #5  [cosim] pass (rc=0, 443.0s) | cosim=Pass measured_latency(max)=211   [spent 30/60]
  budget 30/60 credits spent (csimx2, synthx2, cosimx1)

=== Grading (hidden testbench + PPA, uncharged) ===
=== Scorecard: matmul_optimize (difficulty 3) ===
  functional (hidden TB): PASS
  synthesizable         : PASS
  baseline latency      : 16422 cyc
  candidate latency     : 78 cyc
  acceleration          : 210.54x  (opt=True)
  candidate resources   : LUT=313401 FF=540407 DSP=5056 BRAM=0
  SCORE                 : 3.000

recent scores (matmul_optimize):
  2026-07-25 23:18  SCORE 3.000  lat=78  credits=30  tokens=54526

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