tactic * mk_qfbv_tactic(ast_manager& m, params_ref const & p, tactic* sat, tactic* smt) { params_ref local_ctx_p = p; local_ctx_p.set_bool("local_ctx", true); params_ref solver_p; solver_p.set_bool("preprocess", false); // preprocessor of smt::context is not needed. params_ref no_flat_p; no_flat_p.set_bool("flat", false); params_ref ctx_simp_p; ctx_simp_p.set_uint("max_depth", 32); ctx_simp_p.set_uint("max_steps", 50000000); params_ref big_aig_p; big_aig_p.set_bool("aig_per_assertion", false); tactic* preamble_st = mk_qfbv_preamble(m, p); tactic * st = main_p(and_then(preamble_st, // If the user sets HI_DIV0=false, then the formula may contain uninterpreted function // symbols. In this case, we should not use the `sat', but instead `smt'. Alternatively, // the UFs can be eliminated by eager ackermannization in the preamble. cond(mk_is_qfbv_eq_probe(), and_then(mk_bv1_blaster_tactic(m), using_params(smt, solver_p)), cond(mk_is_qfbv_probe(), and_then(mk_bit_blaster_tactic(m), when(mk_lt(mk_memory_probe(), mk_const_probe(MEMLIMIT)), and_then(using_params(and_then(mk_simplify_tactic(m), mk_solve_eqs_tactic(m)), local_ctx_p), if_no_proofs(cond(mk_produce_unsat_cores_probe(), mk_aig_tactic(), using_params(mk_aig_tactic(), big_aig_p))))), sat), smt)))); st->updt_params(p); return st; }
tactic * mk_qfbv_tactic(ast_manager & m, params_ref const & p) { params_ref main_p; main_p.set_bool("elim_and", true); main_p.set_bool("push_ite_bv", true); main_p.set_bool("blast_distinct", true); params_ref simp2_p = p; simp2_p.set_bool("som", true); simp2_p.set_bool("pull_cheap_ite", true); simp2_p.set_bool("push_ite_bv", false); simp2_p.set_bool("local_ctx", true); simp2_p.set_uint("local_ctx_limit", 10000000); simp2_p.set_bool("flat", true); // required by som simp2_p.set_bool("hoist_mul", false); // required by som params_ref local_ctx_p = p; local_ctx_p.set_bool("local_ctx", true); params_ref solver_p; solver_p.set_bool("preprocess", false); // preprocessor of smt::context is not needed. params_ref no_flat_p; no_flat_p.set_bool("flat", false); params_ref ctx_simp_p; ctx_simp_p.set_uint("max_depth", 32); ctx_simp_p.set_uint("max_steps", 50000000); params_ref hoist_p; hoist_p.set_bool("hoist_mul", true); hoist_p.set_bool("som", false); params_ref solve_eq_p; // conservative guassian elimination. solve_eq_p.set_uint("solve_eqs_max_occs", 2); params_ref big_aig_p; big_aig_p.set_bool("aig_per_assertion", false); tactic * preamble_st = and_then(and_then(mk_simplify_tactic(m), mk_propagate_values_tactic(m), using_params(mk_solve_eqs_tactic(m), solve_eq_p), mk_elim_uncnstr_tactic(m), if_no_proofs(if_no_unsat_cores(mk_bv_size_reduction_tactic(m))), using_params(mk_simplify_tactic(m), simp2_p)), // Z3 can solve a couple of extra benchmarks by using hoist_mul // but the timeout in SMT-COMP is too small. // Moreover, it impacted negatively some easy benchmarks. // We should decide later, if we keep it or not. using_params(mk_simplify_tactic(m), hoist_p), mk_max_bv_sharing_tactic(m)); #ifdef USE_OLD_SAT_SOLVER tactic * new_sat = and_then(mk_simplify_tactic(m), mk_smt_tactic()); #else tactic * new_sat = cond(mk_or(mk_produce_proofs_probe(), mk_produce_unsat_cores_probe()), and_then(mk_simplify_tactic(m), mk_smt_tactic()), mk_sat_tactic(m)); #endif tactic * st = using_params(and_then(preamble_st, // If the user sets HI_DIV0=false, then the formula may contain uninterpreted function // symbols. In this case, we should not use cond(mk_is_qfbv_probe(), cond(mk_is_qfbv_eq_probe(), and_then(mk_bv1_blaster_tactic(m), using_params(mk_smt_tactic(), solver_p)), and_then(mk_bit_blaster_tactic(m), when(mk_lt(mk_memory_probe(), mk_const_probe(MEMLIMIT)), and_then(using_params(and_then(mk_simplify_tactic(m), mk_solve_eqs_tactic(m)), local_ctx_p), if_no_proofs(cond(mk_produce_unsat_cores_probe(), mk_aig_tactic(), using_params(mk_aig_tactic(), big_aig_p))))), new_sat)), mk_smt_tactic())), main_p); st->updt_params(p); return st; }