{"id":2827,"job_id":5960,"problem_id":6,"lane_id":33,"type":"explore","user_id":76,"model":"auto","provider":"unknown","report_md":"# First look (route 260): compiled H0-abort hill-climb ≈ break-even, not ≥1.2×\n\n**Outcome: blocked.** Median abort/full score≥4 finds per wall-second = **0.998** (preregistered success ≥1.2).\n\n## Experiment\n\nC RFC dest-cycle MD5 (fixture score-12 verified; abort/full agree 0 mismatches / 50k). Equal 20 s wall × 3 seeds on Linux aarch64/gcc-O3:\n\n- **Full:** 2812-style nibble hill-climb; 64 steps every proposal.\n- **Abort:** same neighborhood; reject after step 61 if first digest hex ≠ `cand[0]`; else finish 62–64.\n\n## Results\n\n| Seed | full finds4/s | abort finds4/s | ratio |\n|---:|---:|---:|---:|\n| 0 | 48.60 | 47.25 | **0.972** |\n| 1 | 43.35 | 50.40 | **1.163** |\n| 2 | 46.45 | 46.35 | **0.998** |\n\nMedian ratio **0.998**; all three < 1.2. Abort runs slightly more proposals (~65M vs ~62M / 20 s) but ~94% abort; net wall finds stay ≈ full. Best score **6** both arms.\n\n## Obstacle\n\nScoped obstruction: on this host/runtime, C step-61 H0-abort nibble hill-climb does not deliver ≥1.2× score≥4 finds per wall-second vs full-MD5 C hill-climb (median 0.998). Revisit with a deeper filter (k≥2) only if accompanied by a cheaper partial kernel (SIMD/batch) that changes the reject cost model—not another scalar 61-vs-64 bake-off at k=1.\n\n## OUTCOMES.md entry (proposed)\n\n| Track | Method | Budget and hardware | Best reached | Note |\n| --- | --- | --- | --- | --- |\n| Self match | C H0-abort vs full hill-climb (20s×3) | ~0.1 CPU-h; aarch64 gcc-O3 | score 6; median ratio 0.998 | Route 260 blocked |\n","patch":null,"cpu_hours":0.1,"hashes":{"test.out":"4d26f254332ba3257b04b9986121217c62bb442e61c3eb0faf9fe9c1fdd01318","recipe.md":"6a174be93e0065ccddcf5131d4aeb76d6b2fadefbb0e3b6514abce8fe2233679","report.md":"dd85ccb2b9f62239a4664f09901cfd4366c66ff543217b089725bc4f63b55a7f","bakeoff.out":"fdb7469d54f0028b43f64b797d59c668cdeae338ddc9a2b828846883c904ebed","hill_abort.c":"04b6e530d51257516821be5c74fc1bc1efe954312a435dd0798931f4b7210710","results.json":"689155cb842dc42806d3af29402f41887d0f3f1b7b82323f0faf87ee1e1a38ae","transcript_summary.md":"64f68b9746e33f7c34fe51bec77648ae7d289c715efadf9426accb0420eae0d2","submission_receipts.json":"9613162420f9ec7a5667ad31322e53644dd201940d97e950eb3039805407bf88"},"author_rung":"measured","status":"recorded","final_rung":"recorded","created_at":"2026-10-10T20:15:44.562Z","repo_url":null,"commit":null,"cites":{"files":["689155cb842dc42806d3af29402f41887d0f3f1b7b82323f0faf87ee1e1a38ae","04b6e530d51257516821be5c74fc1bc1efe954312a435dd0798931f4b7210710","dd85ccb2b9f62239a4664f09901cfd4366c66ff543217b089725bc4f63b55a7f","6a174be93e0065ccddcf5131d4aeb76d6b2fadefbb0e3b6514abce8fe2233679","64f68b9746e33f7c34fe51bec77648ae7d289c715efadf9426accb0420eae0d2","4d26f254332ba3257b04b9986121217c62bb442e61c3eb0faf9fe9c1fdd01318","fdb7469d54f0028b43f64b797d59c668cdeae338ddc9a2b828846883c904ebed","9613162420f9ec7a5667ad31322e53644dd201940d97e950eb3039805407bf88"],"handles":[],"returns":[2826,2818,2812,2795],"messages":[]},"tokens":{"log":"summary","input":0,"models":{},"output":0,"source":"none","entries":0,"cache_read":0,"cache_write":0,"observed_models":[]},"paper_slug":null,"revision_path":null,"revision_sha":null,"recipe_md":"# Recipe\n\n```bash\ngcc -O3 -std=c11 hill_abort.c -o hill_abort\n./hill_abort test\n./hill_abort 20 3 0x260A\n# expect SELFTEST mismatches=0; median ratio_abort_over_full ~1.0 (<1.2)\n```","verification":null,"target":null,"finding":null,"human_md":null,"provisional":false,"effects_applied_at":null,"effort":null,"also_fix":null,"transcript_omitted":{"share":0,"omitted":0,"outputs":0},"patch_hash":null,"superseded_by":null,"duplicate_of":null,"transcript_resubmitted_at":null,"file_notes":null,"research":{"outcome":"blocked","obstacle":{"kind":"scoped_obstruction","evidence":"results.json ratios [0.972,1.163,0.998]; test.out mismatches=0; bakeoff.out.","statement":"C-compiled step-61 H0-abort nibble hill-climb does not beat full-MD5 C hill-climb in score>=4 finds per wall-second on Linux aarch64/gcc-O3 (median ratio 0.998; success bar 1.2).","assumptions":"RFC dest-cycle scalar MD5; ASCII32; 2812-style accept/reject; filter on first digest hex only; 20s wall × 3 seeds; single host.","revisit_when":"A SIMD/batch partial-MD5 where reject cost is far below one scalar 61-step pass, or a filter depth/kernel that changes the ~15/16 reject fraction economics—not another scalar k=1 61-vs-64 bake-off on this host."},"route_id":260,"depends_on":[2826,2818,2812],"evidence_md":"results.json: 20s×3-seed C bake-off; median abort/full finds4/s = 0.997847 < 1.2; self-test 0 mismatches. Fixture and abort/full agreement hold."},"research_route_id":260,"verification_plan":null,"verification_fingerprint":null,"review_admitted_at":null,"department_id":"dept_fa6dbf79354b8806abb61eec","run_id":"run_a7419dd35088e539169f2abb","triage_lead":null,"revision_base_sha":null,"integration":null,"resolves":null,"paper_exposition":null,"research_evidence":null,"transcript_mode":"summary","known_work":null,"work_disposition":null,"handle":"aasper03","job_brief":"Search online for existing attempts, results, tables and datasets before testing feasibility. Reuse the recorded search and inspect the closest sources and weakest assumption. Use published numbers with citations; do not reproduce them in a first look. Seek the smallest experiment on the uncovered step. Recommend promising only with specific evidence and a bounded next step; do not claim the route is proved. Map the assumptions of any borrowed method onto this problem.\n\nRead GET <project base>/research-routes/260 and return #2826. Return the ordinary report and transcript plus research: {route_id: 260, outcome: \"promising|progress|blocked|inconclusive|known|result\", evidence_md: \"what the evidence changes, <=4000 chars\", prior_art_md: \"updated online search record, sources and exact remaining gap, <=4000\", next_step: {question, method, success, failure, budget_hours} <only for continued pursuit; what to do, never when or how fast; it must not ask for what a return on this route or a linked route already did, and the route returns it builds on go in depends_on or cites.returns>, obstacle: {kind, statement, assumptions, evidence, revisit_when} <for blocked/inconclusive>, depends_on: [<return ids actually required>]}. A result with a distinct next_step requests review and continues pursuit concurrently; omit next_step when no further experiment is warranted. Use known with prior_art_md and no next_step or obstacle when cited prior work already covers the proposed contribution; it stops automatic investigation without requesting review. The evidence grade is separate. Do not close a broad route because one proof attempt failed.","review_deferred":false,"in_triage":false,"triage":[],"lean_statement_binding":null,"lean_execution_binding":null,"lean_scientific_identity":null,"lean_execution_identity":null,"verification_runs":[],"verification_state":null,"verification_summary":null,"canonical_return":null,"review_history":[],"dependencies":[{"id":"2812","status":"accepted","final_rung":"verified","canonical_return_id":null},{"id":"2818","status":"recorded","final_rung":"recorded","canonical_return_id":null},{"id":"2826","status":"recorded","final_rung":"recorded","canonical_return_id":null}],"cited_by":[{"id":2833,"handle":"aasper03","status":"accepted"},{"id":2834,"handle":"aasper03","status":"recorded"},{"id":2836,"handle":"aasper03","status":"pending"}],"route_dependents":[260,262],"research_url":"/projects/md5/research-routes/260","transcript_url":"/projects/md5/return/2827/transcript","files":[{"sha256":"689155cb842dc42806d3af29402f41887d0f3f1b7b82323f0faf87ee1e1a38ae","name":"results.json","bytes":2143},{"sha256":"04b6e530d51257516821be5c74fc1bc1efe954312a435dd0798931f4b7210710","name":"hill_abort.c","bytes":8763},{"sha256":"dd85ccb2b9f62239a4664f09901cfd4366c66ff543217b089725bc4f63b55a7f","name":"report.md","bytes":1529},{"sha256":"6a174be93e0065ccddcf5131d4aeb76d6b2fadefbb0e3b6514abce8fe2233679","name":"recipe.md","bytes":182},{"sha256":"64f68b9746e33f7c34fe51bec77648ae7d289c715efadf9426accb0420eae0d2","name":"transcript_summary.md","bytes":488},{"sha256":"4d26f254332ba3257b04b9986121217c62bb442e61c3eb0faf9fe9c1fdd01318","name":"test.out","bytes":74},{"sha256":"fdb7469d54f0028b43f64b797d59c668cdeae338ddc9a2b828846883c904ebed","name":"bakeoff.out","bytes":1204},{"sha256":"9613162420f9ec7a5667ad31322e53644dd201940d97e950eb3039805407bf88","name":"submission_receipts.json","bytes":1012}],"decided_by_author_handle":false,"reviews":[],"decisions":[],"decision":null,"report_sha256":"dd85ccb2b9f62239a4664f09901cfd4366c66ff543217b089725bc4f63b55a7f","research_authority":{"witness_status":null,"research_status":"recorded","scopes":[]},"research_links":[],"duplicates":[],"cited_messages":[]}