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allow for string solver none and empty for #2268

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-05-07 02:32:39 +02:00
parent 689818c8bb
commit cbbb77bf2c
2 changed files with 12 additions and 2 deletions
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2
src/smt/params/smt_params_helper.pyg
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@ -67,7 +67,7 @@ def_module_params(module_name='smt',
('dack.gc_inv_decay', DOUBLE, 0.8, 'Dynamic ackermannization garbage collection decay'),
('dack.threshold', UINT, 10, ' number of times the congruence rule must be used before Leibniz\'s axiom is expanded'),
('theory_case_split', BOOL, False, 'Allow the context to use heuristics involving theory case splits, which are a set of literals of which exactly one can be assigned True. If this option is false, the context will generate extra axioms to enforce this instead.'),
('string_solver', SYMBOL, 'seq', 'solver for string/sequence theories. options are: \'z3str3\' (specialized string solver), \'seq\' (sequence solver), \'auto\' (use static features to choose best solver)'),
('string_solver', SYMBOL, 'seq', 'solver for string/sequence theories. options are: \'z3str3\' (specialized string solver), \'seq\' (sequence solver), \'auto\' (use static features to choose best solver) \'empty\' (a no-op solver that forces an answer unknown if strings were used) \'none\' (no solver)'),
('core.validate', BOOL, False, 'validate unsat core produced by SMT context'),
('seq.split_w_len', BOOL, True, 'enable splitting guided by length constraints'),
('str.strong_arrangements', BOOL, True, 'assert equivalences instead of implications when generating string arrangement axioms'),

12
src/smt/smt_setup.cpp
View file

@ -735,6 +735,13 @@ namespace smt {
else if (m_params.m_string_solver == "auto") {
setup_unknown();
}
else if (m_params.m_string_solver == "empty") {
m_context.register_plugin(alloc(smt::theory_seq_empty, m_manager));
}
else if (m_params.m_string_solver == "none") {
// don't register any solver.
}
else {
throw default_exception("invalid parameter for smt.string_solver, valid options are 'z3str3', 'seq', 'auto'");
}
@ -901,7 +908,10 @@ namespace smt {
setup_seq();
}
else if (m_params.m_string_solver == "empty") {
m_context.register_plugin(alloc(smt::theory_seq_empty, m_manager, m_params));
m_context.register_plugin(alloc(smt::theory_seq_empty, m_manager));
}
else if (m_params.m_string_solver == "none") {
// don't register any solver.
}
else if (m_params.m_string_solver == "auto") {
if (st.m_has_seq_non_str) {