Artifact 1abe1089c15a53dedf3521e81e6fab17d7a947f91c10fbec4d0cd0a2bf2e204b:
serve_fuzz already fails a run when its generator stops reaching the dispatch arms it exists to exercise, and merge3 does the same for conflict shapes. Generalize that guard so a generator that has drifted to one outcome can no longer pass every no-crash round while testing nothing on the arm it dropped.
Six targets gain a measured reached-outcomes floor: delta decodeInt and targetSize (a decoded value vs MalformedDelta), artifact predicates (simple-pathname and wiki-name each accepting and rejecting), sync card parsers (push/igot/uvgimme each accepting and rejecting), logstore open (torn-tail recovery vs Corrupt), and transport deframe (a damaged container both decoding and being rejected). Every threshold is counted at a fixed seed, stated in the comment, and set below the arm's measured frequency; each floor gates above a minimum round count so short runs never trip it.
Every other target carries a one-line note on why its outcome space does not partition: round-trips have only a success arm, and several garbage generators reach only their reject arm, the accept arm covered by the round-trip and deterministic tests. by dmestas on 2026-07-20 04:06:34.
C fuzz:\sfloor\soutcome\sreachability\sacross\sthe\sfuzz\stargets\n\nserve_fuzz\salready\sfails\sa\srun\swhen\sits\sgenerator\sstops\sreaching\sthe\ndispatch\sarms\sit\sexists\sto\sexercise,\sand\smerge3\sdoes\sthe\ssame\sfor\nconflict\sshapes.\sGeneralize\sthat\sguard\sso\sa\sgenerator\sthat\shas\sdrifted\sto\none\soutcome\scan\sno\slonger\spass\severy\sno-crash\sround\swhile\stesting\snothing\non\sthe\sarm\sit\sdropped.\n\nSix\stargets\sgain\sa\smeasured\sreached-outcomes\sfloor:\sdelta\sdecodeInt\sand\ntargetSize\s(a\sdecoded\svalue\svs\sMalformedDelta),\sartifact\spredicates\n(simple-pathname\sand\swiki-name\seach\saccepting\sand\srejecting),\ssync\ncard\sparsers\s(push/igot/uvgimme\seach\saccepting\sand\srejecting),\slogstore\nopen\s(torn-tail\srecovery\svs\sCorrupt),\sand\stransport\sdeframe\s(a\sdamaged\ncontainer\sboth\sdecoding\sand\sbeing\srejected).\sEvery\sthreshold\sis\scounted\nat\sa\sfixed\sseed,\sstated\sin\sthe\scomment,\sand\sset\sbelow\sthe\sarm's\smeasured\nfrequency;\seach\sfloor\sgates\sabove\sa\sminimum\sround\scount\sso\sshort\sruns\nnever\strip\sit.\n\nEvery\sother\starget\scarries\sa\sone-line\snote\son\swhy\sits\soutcome\sspace\sdoes\nnot\spartition:\sround-trips\shave\sonly\sa\ssuccess\sarm,\sand\sseveral\sgarbage\ngenerators\sreach\sonly\stheir\sreject\sarm,\sthe\saccept\sarm\scovered\sby\sthe\nround-trip\sand\sdeterministic\stests.\n 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