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Add a sharp throttle to lia2card tactic to control overhead in default tactic mode

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lia2card was added to qfuflia tactic based on a user scenario, but it overshot: lia2card is by default harmful. It is here tamed to only convert binary variables and throttle on nested ite terms
This commit is contained in:
Nikolaj Bjorner 2025-02-02 13:58:51 -08:00
parent fd2a8a554d
commit 99cbfa715c
3 changed files with 24 additions and 10 deletions
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9
src/tactic/smtlogics/qflia_tactic.cpp
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@ -192,6 +192,11 @@ tactic * mk_preamble_tactic(ast_manager& m) {
ctx_simp_p.set_uint("max_depth", 30);
ctx_simp_p.set_uint("max_steps", 5000000);
// only binary integer variables are converted to PB
params_ref lia2card_p;
lia2card_p.set_uint("lia2card.max_range", 1);
lia2card_p.set_uint("lia2card.max_ite_nesting", 1);
return
and_then(
mk_simplify_tactic(m),
@ -199,7 +204,7 @@ tactic * mk_preamble_tactic(ast_manager& m) {
using_params(mk_ctx_simplify_tactic(m), ctx_simp_p),
using_params(mk_simplify_tactic(m), pull_ite_p),
mk_solve_eqs_tactic(m),
mk_lia2card_tactic(m),
mk_lia2card_tactic(m, lia2card_p),
mk_elim_uncnstr_tactic(m));
}
@ -209,6 +214,8 @@ tactic * mk_qflia_tactic(ast_manager & m, params_ref const & p) {
main_p.set_bool("som", true);
main_p.set_bool("blast_distinct", true);
main_p.set_uint("blast_distinct_threshold", 128);
main_p.set_uint("lia2card.max_range", 1);
main_p.set_uint("lia2card.max_ite_nesting", 1);
// main_p.set_bool("push_ite_arith", true);
params_ref quasi_pb_p;