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feat(verify): expand formal verification to 7 specs, add versioning, CI integration

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Added 3 new TLA+ specs:
- gossip.tla — SWIM gossip membership & failure detection
- deadlock.tla — wait-for graph deadlock detection
- sharding.tla — consistent hashing shard assignment

Improved existing 4 specs:
- raft.tla: added CommittedIndexValid invariant
- twopc.tla: added CoordinatorConsistency, NoDecideWithoutConsensus,
  ParticipantStateValid; increased to MaxTxnId=3
- mvcc.tla: added CommittedMustStart, CommittedVersionsUnique
- replication.tla: added AppliedLteCurrent, SemiSyncQuorum

Infrastructure:
- VERSION file (1.0.0)
- CHANGELOG.md
- ANALYSIS.md (weak spots & improvement plan)
- run_all.sh script for batch TLC verification
- CI verify job in GitHub Actions
- Updated README with new specs and properties

Total: 7 specs, 26 invariants, 11.6M states checked, 0 errors
This commit is contained in:
dimgigov
2026-05-07 18:26:55 +03:00
parent 215df1cdf3
commit 19d0ff7366
20 changed files with 815 additions and 49 deletions
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formal-verification/models/raft.cfg
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@@ -12,4 +12,6 @@ CHECK_DEADLOCK FALSE
INVARIANTS
TypeOk
ElectionSafety
LeaderAppendOnly
StateMachineSafety
CommittedIndexValid