CEisenhofer
e384e8f3d4
Added right-to-left rules
2026-03-13 17:25:14 +01:00
copilot-swe-agent[bot]
5003cece9d
Implement Parameter integration for theory_nseq (smt.nseq.max_depth)
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Co-authored-by: CEisenhofer <56730610+CEisenhofer@users.noreply.github.com>
2026-03-04 15:45:55 +00:00
copilot-swe-agent[bot]
0bdec633d7
Implement ZIPT string solver skeleton (theory_nseq)
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Add theory_nseq, a Nielsen-graph-based string solver plugin for Z3.
## New files
- src/smt/nseq_state.h/.cpp: constraint store bridging SMT context to
Nielsen graph with manual push/pop backtracking
- src/smt/nseq_regex.h/.cpp: regex membership handling via Brzozowski
derivatives (stub delegates to sgraph::brzozowski_deriv)
- src/smt/nseq_model.h/.cpp: model generation stub
- src/smt/theory_nseq.h/.cpp: main theory class implementing smt::theory
with its own private egraph/sgraph, returns FC_GIVEUP as skeleton
- src/test/nseq_basic.cpp: unit tests covering instantiation, parameter
validation, trivial-equality SAT, and node simplification
## Extensions to seq_nielsen.h/.cpp
- Add search_result enum and solve() iterative-deepening DFS entry point
- Add search_dfs() recursive DFS driver
- Add simplify_node(), generate_extensions(), collect_conflict_deps()
- Add nielsen_node::simplify_and_init(): trivial removal, empty
propagation, prefix matching, symbol clash detection
- Add nielsen_node::is_satisfied(), is_subsumed_by()
- Implement Det, Const Nielsen, and Eq-split modifiers in
generate_extensions()
## Integration
- smt_params.cpp: accept 'nseq' as valid string_solver value
- smt_params_helper.pyg: document 'nseq' option
- smt_setup.h/.cpp: add setup_nseq(), wire into setup_QF_S() and
setup_seq_str()
- smt/CMakeLists.txt: add new sources and smt_seq dependency
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-03-03 21:50:21 +00:00
Lev Nachmanson
887ecc0c98
throttle grobner method more actively
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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
2025-10-22 21:36:22 -07:00
Lev Nachmanson
58e64ea826
try exponential delay in grobner
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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
2025-10-22 17:00:16 -07:00
Nikolaj Bjorner
866393a842
update defaults for new grobner featuers
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2025-09-05 14:34:03 -07:00
Nikolaj Bjorner
98a9a34f2b
add option to reduce pseudo-linear monomials
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2025-09-04 11:04:12 -07:00
Nikolaj Bjorner
e0c315bc3e
filter pseudo-linear monomials
2025-09-03 17:51:12 -07:00
Nikolaj Bjorner
e2235d81d3
add option for gcd-test to grobner
2025-09-01 16:37:21 -07:00
Nikolaj Bjorner
e91e432496
add option to propagation quotients
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for equations x*y + z = 0,
with x, y, z integer, enforce that x divides z
It is (currently) enabled within Grobner completion
and applied partially to x a variable, z linear, and
only when |z| < |x|.
2025-08-31 14:41:23 -07:00
Nikolaj Bjorner
06de5f422c
remove str parameters
2025-08-29 17:06:13 -07:00
Nikolaj Bjorner
c75b8ec752
add option to control epsilon #7791
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#7791 reports on using model values during lex optimization that break soft constraints.
This is an artifact of using optimization where optimal values can be arbitrarily close to a rational.
In a way it is by design, but we give the user now an option to control the starting point for epsilon when converting infinitesimals into rationals.
2025-08-17 16:51:00 -07:00
Nikolaj Bjorner
e54928679f
add option to selectively disable variable solving for only ground expressions
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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
2025-07-25 19:15:20 -07:00
Lev Nachmanson
d717dae3ac
remove the parameter for throttling nla lemmas
2025-06-26 16:33:16 -07:00
Lev Nachmanson
5bda42e104
rename new_lemma to lemma_builder
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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
2025-06-26 16:33:16 -07:00
Nikolaj Bjorner
c387b20ac6
move smt params to params directory, update release.yml
2025-06-09 10:47:22 -07:00
