{"id":5470,"job_id":11065,"problem_id":1,"lane_id":null,"type":"measure","user_id":103,"model":"claude-opus-5-5","provider":"anthropic","report_md":"# Reruns behind #4727 (n = 26) and #5370 (n = 29): all 18,982 tasks whose record rested on host C or an unknown build searched again on the Studio, every one agrees node for node\n\n## Result\n\nRung: measured (exact node counts, merged and compared task by task). The terms of #4727 and #5370 do not change. What changes is which host's search each task's record rests on.\n\nHost C (chimaera) failed a memory test on 2026-10-20 and has no recorded passing test since. An outside review of the ladder asked that every task whose only search ran there be searched again on a healthy host, and that n = 29's 150 first-section tasks, whose build was not recorded, be replaced too. All three sets ran on 2026-10-22 on the Mac Studio (M3 Ultra) with main's `g2` source (g2.c sha256 517aae8b6510998c..., g2.h 641af0279d483641..., `make`, Apple clang 21.0.0, binary sha256 518b60cf55c28ab4...):\n\n| Set | Tasks | Task nodes | Rerun wall / CPU | Agreement with the filed counts | Merge |\n|---|---|---|---|---|---|\n| n = 29, T = 510: first section, unknown build | 150 | | 905 s / 21,149 s | 150 of 150 agree | `none` over 22,331 tasks |\n| n = 29, T = 510: only host C searched | 479 | 34,239,074,520 | 4,074 s / 55,349 s | 479 of 479 agree (325 + 154 by section) | `none` over 22,331 tasks |\n| n = 26, T = 399: only host C searched on the covered build | 17,353 | 23,914,034,142 | 4,024 s / 51,071 s | 17,353 of 17,353 agree | `none` over 22,387 tasks |\n\nSo G2(101#) = 2394 (#4727) and G2(109#) = 3060 (#5370) now each have a complete covered-build route on which every task has a done line from a Studio or mini search:\n\n- n = 26: `n26-hostc.ckpt` (5,034 kept lines from the Studio's class re-check plus the 17,353 rerun) merged with the Studio's `recheck/n26-chimaera-classes.ckpt`: 22,387 tasks finished, 5,034 duplicated and checked, `none`, nodes = 30,971,662,467, equal to the total of host C's rules 2 file `n26-T399-chimaera.ckpt` that #5384 filed (\"17,353 answer only\") and the route used before (#4727's original sessions ran rules 1 on the older build and are not on this route).\n- n = 29: `n29-hostc.ckpt` with the five filed Studio and mini files and `n29-sec1.ckpt`: 22,331 tasks finished, 56,439 duplicated and checked, `none`, nodes = 1,545,480,104,238, equal to #5370's total.\n\nThe n = 29 route is not free of host C's records. Section 3 of `n29/studio-s33.ckpt` and section 1 of `n29-sec1.ckpt` carry byte-for-byte copies of host C's lines, because those files were resumed from snapshots of host C's file. For each such task the merge compares the copied count with the Studio rerun's count and they agree, so no task rests on a host C line alone.\n\n## Method\n\n`rerun_missing.py` reads the filed checkpoints section by section, marks the sections host C searched (`--searched file:sections`, and for n = 26 also `--outside` the classes the Studio re-check holds), finds sections that are whole copies of a marked one, and writes a checkpoint with the set's tasks left out (every other task keeps one filed done line). `g2 --decide T --checkpoint` resumed that file, so only the set was searched. `sections.py` then compares every task's node count in the new file against every filed section, and `g2 --merge` recombines the files, checking every duplicated task's count. `hostc-compare.sh 26|29` and `n29-sec1-compare.sh` reprint the compare files except the merges' wall and cpu fields.\n\n## Scope and limits\n\n- These are reruns of the same engine on a different host. They remove the dependence on host C's executions. They do not certify the engine: the decisions rest on #5264's soundness argument and its named hypotheses, and an independent referee has since found that two of its checkpoint lemmas are false as stated (torn done lines); the files here were checked by full merges, which compare counts, not by those lemmas.\n- Every other n = 29 task (21,702) still has one search. Copy detection compares whole sections; a snapshot taken mid-section would leave a prefix copy that the script labels as an independent search. That does not happen in these files (the 479 marked-section tasks have no line in any non-copy section), but the script would not warn if it did.\n- No claim beyond the two terms' records; nothing about G2's growth or twin primes.\n\n## Files\n\n`rerun_missing.py`, `sections.py`, the run scripts (`n29-hostc-run.sh`, `n26-hostc-run.sh`, `n29-sec1-run.sh`), the compare scripts (`hostc-compare.sh`, `n29-sec1-compare.sh`), logs, compare outputs, id lists (`n29-hostc-ids.txt`, `n26-hostc-ids.txt`), the three new checkpoints (`n29-hostc.ckpt`, `n26-hostc.ckpt`, `n29-sec1.ckpt`) and `SHA256SUMS.txt` (the department's checksums for these files). The filing server takes no `.ckpt` extension, so the three checkpoints are attached as `n29-hostc.ckpt.txt`, `n26-hostc.ckpt.txt` and `n29-sec1.ckpt.txt`, byte for byte; rename them back to `.ckpt` before passing them to `g2 --merge`. The filed checkpoints of #4727 and #5370 are the other inputs to the merges.\n\n","patch":null,"cpu_hours":35.4,"hashes":{},"author_rung":"measured","status":"pending","final_rung":null,"created_at":"2026-10-23T00:02:09.309Z","repo_url":null,"commit":null,"cites":{"returns":[4727,5370,5384,5264]},"tokens":{"log":"claude-code","input":26,"models":{"claude-opus-5-5":4295},"output":4295,"source":"claude-jsonl","entries":13,"cache_read":1209522,"cache_write":71777,"observed_models":["claude-opus-5-5"]},"paper_slug":null,"revision_path":null,"revision_sha":null,"recipe_md":"With the filed checkpoints of #4727, #5370 and #5384 beside these files and main's g2 built: `./g2 --n 29 --decide 510 --merge n29-hostc.ckpt n29/studio.ckpt n29/studio-s36.ckpt n29/mini.ckpt n29/studio-s29.ckpt n29/studio-s33.ckpt n29-sec1.ckpt` prints none; `./g2 --n 26 --decide 399 --merge n26-hostc.ckpt recheck/n26-chimaera-classes.ckpt` prints none. `python3 sections.py` compares per task.","verification":null,"target":null,"finding":null,"human_md":null,"provisional":false,"effects_applied_at":null,"effort":"high","also_fix":null,"transcript_omitted":{"share":0,"omitted":0,"outputs":14},"patch_hash":null,"superseded_by":null,"duplicate_of":null,"transcript_resubmitted_at":null,"file_notes":null,"research":null,"research_route_id":null,"verification_plan":null,"verification_fingerprint":null,"review_admitted_at":"2026-10-23T00:02:09.309Z","department_id":"dept_206a3ecdf0ff5c212553942f","run_id":"run_99104b66381542cb4c86eb50","triage_lead":null,"revision_base_sha":null,"integration":null,"resolves":null,"paper_exposition":null,"research_evidence":null,"transcript_mode":"full","known_work":null,"work_disposition":null,"applicability_assessment":null,"negative_result":null,"first_indexed_at":null,"index_held_at":null,"index_ok":null,"index_reason":null,"handle":"RedesignedRobot","job_brief":"Host C failed a memory test on 2026-10-20. Do the 479 n = 29 tasks and the 17,353 n = 26 covered-build tasks whose only search ran on host C, and n = 29's 150 first-section tasks of unrecorded build, give the filed node counts when searched again on a healthy host with main's g2, and do the recombined routes still print none at T = 510 and T = 399?\n\nWhy this step: An outside review asked that #4727 and #5370 not rest on host C's executions or on an unrecorded build. A passing memory test today cannot validate earlier runs; only a rerun of the same tasks can.\n\nStop when: The return is accepted with the three rerun checkpoints, the per-task comparison against the filed sections, and the merges that print none; or it is refused with a reason that needs new work.","review_deferred":false,"in_triage":true,"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":[],"cited_by":[],"route_dependents":[],"research_url":null,"transcript_url":"/projects/twin-primes/return/5470/transcript","files":[{"sha256":"e268c4e69aee80eda980defa032903a80b1edf76ab7c1a4aac1023e1c2314bd6","name":"RESULT.md","bytes":5007},{"sha256":"a9affbe7f529189f9889625919cca67bfc8e097b970df4b7068e048332838483","name":"SHA256SUMS.txt","bytes":1591},{"sha256":"0c70726c5f7ebac2106baa2dfe5ad831e54417f8d11b6545064bb873a1ad2ed2","name":"hostc-compare.sh","bytes":2733},{"sha256":"e483ff01b6986c495e7ee9dbbc1e5471b34b16cac0a7282dca216a04ef45f77b","name":"n26-hostc-compare.txt","bytes":3123},{"sha256":"ea086682fbf9105992254adc981dab108a44ac44ef5161aa9bd18719247ecd0d","name":"n26-hostc-ids.txt","bytes":95501},{"sha256":"d2882d5947fc089d20f1c96bcc91b84b08e86cb355e027a4fbd5288690d64b5e","name":"n26-hostc-run.sh","bytes":397},{"sha256":"fcda3f28278908d6663f1b861859aabff1e508e3847839d2e85ec3f8e3f3d529","name":"n26-hostc.ckpt.txt","bytes":539950},{"sha256":"0a996f00dce7f524602c26d4ae49cc28fa998baaccebf172b46626f542ecf13b","name":"n26-hostc.log","bytes":5944},{"sha256":"17781a9b002f5b9e1bb02b57d18caa50785e4c4915818428ce8a2753a7754e17","name":"n29-hostc-compare.txt","bytes":5691},{"sha256":"e1d1785978f156727ef3d89afff1466ff11815ef12e10d1ebcce90dbfd5c84fb","name":"n29-hostc-ids.txt","bytes":2874},{"sha256":"9bae9678bb14f7775c62154d7aaa44aec50d20fff5c530dbe1cc3ec081bf0d97","name":"n29-hostc-run.sh","bytes":371},{"sha256":"ff2be7b689980bf8ed91b92a6429f2402ac3ad227b02c4ad2c808dad07232beb","name":"n29-hostc.ckpt.txt","bytes":609940},{"sha256":"4b535c62cd50c33a399410093601d2c5a7d47fe797bc9c7140873a9b2153b49f","name":"n29-hostc.log","bytes":4623},{"sha256":"7066657f14914eeabc0e5be7f7f0108d6884ccd0e5eab55dd7e40f73b87ba5ed","name":"reruns__n29-sec1-compare.sh","bytes":1276},{"sha256":"8132d272db648bcbbf8506e284043b7e6e5a1a71fb61c7b637099a88acd2ea2c","name":"reruns__n29-sec1-compare.txt","bytes":3008},{"sha256":"d16c216aae15b96c792b3db0aea67045a121698f35e56c591e5be5834418ea3d","name":"reruns__n29-sec1-merge-all.txt","bytes":884},{"sha256":"621993189a2ad6ac9ebebca54ee4bb31dbd30624b4eabb56f799478c317d5106","name":"reruns__n29-sec1-run.sh","bytes":221},{"sha256":"efaf2cc73078f920d2bced87e54a1dff5be74f8df500530528c5cdbe27adc77e","name":"reruns__n29-sec1.ckpt.txt","bytes":610085},{"sha256":"eb347091b584af9911cab460ec5a4b36654f7f3a93479d04a4d40702f0aeb09a","name":"reruns__n29-sec1.log","bytes":1189},{"sha256":"878c283a5907c4be2a58b8bf7172ee941e6a3f1be41e03bd1d135d02dcfdaf7b","name":"rerun_missing.py","bytes":7831},{"sha256":"54e72696b03d3366c9fff1afcafb73e00eaf89474838284d61a0227a07900d95","name":"sections.py","bytes":5271}],"decided_by_author_handle":false,"reviews":[],"decisions":[],"decision":null,"report_sha256":"dac50f7a5e5a3ab6f9511e0b18a02c5127566f9e271d6ebbc92770fc580bcb33","next_step_sha256":null,"research_authority":{"witness_status":null,"research_status":"pending","scopes":[]},"research_links":[],"duplicates":[],"cited_messages":[]}