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add shortcuts in rewriter, eliminate redundancies in dependent_expr tactic

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This commit is contained in:
Nikolaj Bjorner 2022-11-15 09:13:13 -08:00
parent bfae8b2162
commit 9845c33236
5 changed files with 50 additions and 25 deletions
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57
src/ast/rewriter/th_rewriter.cpp
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@ -183,22 +183,7 @@ struct th_rewriter_cfg : public default_rewriter_cfg {
if (k == OP_EQ) {
// theory dispatch for =
SASSERT(num == 2);
family_id s_fid = args[0]->get_sort()->get_family_id();
if (s_fid == m_a_rw.get_fid())
st = m_a_rw.mk_eq_core(args[0], args[1], result);
else if (s_fid == m_bv_rw.get_fid())
st = m_bv_rw.mk_eq_core(args[0], args[1], result);
else if (s_fid == m_dt_rw.get_fid())
st = m_dt_rw.mk_eq_core(args[0], args[1], result);
else if (s_fid == m_f_rw.get_fid())
st = m_f_rw.mk_eq_core(args[0], args[1], result);
else if (s_fid == m_ar_rw.get_fid())
st = m_ar_rw.mk_eq_core(args[0], args[1], result);
else if (s_fid == m_seq_rw.get_fid())
st = m_seq_rw.mk_eq_core(args[0], args[1], result);
if (st != BR_FAILED)
return st;
st = apply_tamagotchi(args[0], args[1], result);
st = reduce_eq(args[0], args[1], result);
if (st != BR_FAILED)
return st;
}
@ -695,9 +680,35 @@ struct th_rewriter_cfg : public default_rewriter_cfg {
expr_ref mk_app(func_decl* f, unsigned num_args, expr* const* args) {
expr_ref result(m());
proof_ref pr(m());
if (BR_FAILED == reduce_app(f, num_args, args, result, pr)) {
if (BR_FAILED == reduce_app(f, num_args, args, result, pr))
result = m().mk_app(f, num_args, args);
}
return result;
}
br_status reduce_eq(expr* a, expr* b, expr_ref& result) {
family_id s_fid = a->get_sort()->get_family_id();
br_status st = BR_FAILED;
if (s_fid == m_a_rw.get_fid())
st = m_a_rw.mk_eq_core(a, b, result);
else if (s_fid == m_bv_rw.get_fid())
st = m_bv_rw.mk_eq_core(a, b, result);
else if (s_fid == m_dt_rw.get_fid())
st = m_dt_rw.mk_eq_core(a, b, result);
else if (s_fid == m_f_rw.get_fid())
st = m_f_rw.mk_eq_core(a, b, result);
else if (s_fid == m_ar_rw.get_fid())
st = m_ar_rw.mk_eq_core(a, b, result);
else if (s_fid == m_seq_rw.get_fid())
st = m_seq_rw.mk_eq_core(a, b, result);
if (st != BR_FAILED)
return st;
return apply_tamagotchi(a, b, result);
}
expr_ref mk_eq(expr* a, expr* b) {
expr_ref result(m());
if (BR_FAILED == reduce_eq(a, b, result))
result = m().mk_eq(a, b);
return result;
}
@ -897,6 +908,10 @@ struct th_rewriter::imp : public rewriter_tpl<th_rewriter_cfg> {
return m_cfg.mk_app(f, sz, args);
}
expr_ref mk_eq(expr* a, expr* b) {
return m_cfg.mk_eq(a, b);
}
void set_solver(expr_solver* solver) {
m_cfg.m_seq_rw.set_solver(solver);
}
@ -928,7 +943,6 @@ void th_rewriter::set_flat_and_or(bool f) {
m_imp->cfg().m_b_rw.set_flat_and_or(f);
}
th_rewriter::~th_rewriter() {
dealloc(m_imp);
}
@ -941,7 +955,6 @@ unsigned th_rewriter::get_num_steps() const {
return m_imp->get_num_steps();
}
void th_rewriter::cleanup() {
ast_manager & m = m_imp->m();
m_imp->~imp();
@ -991,6 +1004,10 @@ expr_ref th_rewriter::mk_app(func_decl* f, unsigned num_args, expr* const* args)
return m_imp->mk_app(f, num_args, args);
}
expr_ref th_rewriter::mk_eq(expr* a, expr* b) {
return m_imp->mk_eq(a, b);
}
void th_rewriter::set_solver(expr_solver* solver) {
m_imp->set_solver(solver);
}