static tactic * mk_quant_preprocessor(ast_manager & m, bool disable_gaussian = false) {
params_ref pull_ite_p;
pull_ite_p.set_bool("pull_cheap_ite", true);
pull_ite_p.set_bool("local_ctx", true);
pull_ite_p.set_uint("local_ctx_limit", 10000000);
params_ref ctx_simp_p;
ctx_simp_p.set_uint("max_depth", 30);
ctx_simp_p.set_uint("max_steps", 5000000);
tactic * solve_eqs;
if (disable_gaussian)
solve_eqs = mk_skip_tactic();
else
solve_eqs = when(mk_not(mk_has_pattern_probe()), mk_solve_eqs_tactic(m));
// remark: investigate if gaussian elimination is useful when patterns are not provided.
return and_then(mk_simplify_tactic(m),
mk_propagate_values_tactic(m),
using_params(mk_ctx_simplify_tactic(m), ctx_simp_p),
using_params(mk_simplify_tactic(m), pull_ite_p),
solve_eqs,
mk_elim_uncnstr_tactic(m),
mk_simplify_tactic(m));
}
tactic * mk_qfnra_nlsat_tactic(ast_manager & m, params_ref const & p) {
params_ref main_p = p;
main_p.set_bool("elim_and", true);
main_p.set_bool("blast_distinct", true);
params_ref purify_p = p;
purify_p.set_bool("complete", false); // temporary hack, solver does not support uninterpreted functions for encoding (div0 x) applications. So, we replace it application of this kind with an uninterpreted function symbol.
tactic * factor;
if (p.get_bool("factor", true))
factor = mk_factor_tactic(m, p);
else
factor = mk_skip_tactic();
return and_then(and_then(using_params(mk_simplify_tactic(m, p),
main_p),
using_params(mk_purify_arith_tactic(m, p),
purify_p),
mk_propagate_values_tactic(m, p),
mk_solve_eqs_tactic(m, p),
mk_elim_uncnstr_tactic(m, p),
mk_elim_term_ite_tactic(m, p)),
and_then(/* mk_degree_shift_tactic(m, p), */ // may affect full dimensionality detection
factor,
mk_solve_eqs_tactic(m, p),
using_params(mk_simplify_tactic(m, p),
main_p),
mk_tseitin_cnf_core_tactic(m, p),
using_params(mk_simplify_tactic(m, p),
main_p),
mk_nlsat_tactic(m, p)));
}
Z3_tactic Z3_API Z3_tactic_skip(Z3_context c) {
Z3_TRY;
LOG_Z3_tactic_skip(c);
RESET_ERROR_CODE();
tactic * new_t = mk_skip_tactic();
RETURN_TACTIC(new_t);
Z3_CATCH_RETURN(0);
}
