files / problems / three-in-line / compute / q4 / hard-wall.json

1.1 KB · on GitHub

{
  "n": 75,
  "symmetry": "canonical-rct4",
  "cnf": "n75-rct4.cnf",
  "cnf_sha256": "1709cdf478920fd9ed0160bc5f00e049b10f0f6b28a1955560cd4aaa88205317",
  "solver": "cadical195 via PySAT 1.8.dev24",
  "hard_kill_utc": "2026-08-23T20:41:04Z",
  "hard_kill_local": "2026-08-23 13:41:04 PDT",
  "reason": "PySAT's requested interrupt had not returned from the native CaDiCaL call; the parent processes were terminated with SIGTERM",
  "engines": [
    {
      "seed": 1,
      "random_phases": true,
      "requested_solve_limit_seconds": 1500,
      "process_elapsed_seconds_at_kill": 1653,
      "cpu_time_seconds_at_kill": 1637,
      "rss_kb_at_kill": 781052,
      "exit_code": 143,
      "status": "UNKNOWN"
    },
    {
      "seed": 271828,
      "random_phases": true,
      "requested_solve_limit_seconds": 1500,
      "process_elapsed_seconds_at_kill": 1621,
      "cpu_time_seconds_at_kill": 1606,
      "rss_kb_at_kill": 733468,
      "exit_code": 143,
      "status": "UNKNOWN"
    }
  ],
  "note": "Neither engine emitted a model or final solver statistics. UNKNOWN is residue, not an exclusion of rct4 and not a bound on D(75)."
}