mirror of
https://github.com/Z3Prover/z3
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22eb098cd9
Prototype of the notes.md redesign: Split(~a) for star-free a via r = E(~a) | RE(LF(delta(~a))) using brz_derivative_cofactors, of_pred(lambda) char-classes, per-iterator memo (threaded through head_normalize) + De Morgan fallback at ~(R*)/cyclic revisit. RESULT: De Morgan split blow-up ELIMINATED (L15: complement/max-split-set 65536 -> 0), validating the core idea. BUT: (1) SOUNDNESS BUG - concat membership over a derivative-split complement returns spurious unsat ((x.y) in ~([0-9]^2): default sat, nseq unsat; single-var x in ~([0-9]^2) is correct). Split-set not collapsed (49 splits) so of_pred not empty-dropped; fault is downstream handling of of_pred(lambda) char-classes in the concat split/primitive path. (2) bottleneck moved to DFS nodes (7 -> 33071). FIX DIRECTION: represent the cofactor char-class as range/union-of-ranges nseq fully supports, not of_pred(lambda). Do not build on this until fixed. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com> |
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| ackermannization | ||
| api | ||
| ast | ||
| cmd_context | ||
| math | ||
| model | ||
| muz | ||
| nlsat | ||
| opt | ||
| params | ||
| parsers | ||
| qe | ||
| sat | ||
| shell | ||
| smt | ||
| solver | ||
| tactic | ||
| test | ||
| util | ||
| CMakeLists.txt | ||