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debugging nra

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-05-24 21:46:19 -07:00
parent b18dc7d052
commit 1086eaaa1f
7 changed files with 118 additions and 6 deletions
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1
src/ast/ast.cpp
View file

@ -1727,7 +1727,6 @@ ast * ast_manager::register_node_core(ast * n) {
n->m_id = is_decl(n) ? m_decl_id_gen.mk() : m_expr_id_gen.mk();
TRACE("ast", tout << "Object " << n->m_id << " was created.\n";);
TRACE("mk_var_bug", tout << "mk_ast: " << n->m_id << "\n";);
// increment reference counters

45
src/ast/rewriter/arith_rewriter.cpp
View file

@ -738,9 +738,54 @@ br_status arith_rewriter::mk_idiv_core(expr * arg1, expr * arg2, expr_ref & resu
result = m_util.mk_idiv0(arg1);
return BR_REWRITE1;
}
expr_ref quot(m());
if (divides(arg1, arg2, quot)) {
result = m_util.mk_mul(quot, m_util.mk_idiv(arg1, arg1));
return BR_REWRITE2;
}
return BR_FAILED;
}
bool arith_rewriter::divides(expr* d, expr* n, expr_ref& quot) {
if (d == n) {
quot = m_util.mk_numeral(rational(1), m_util.is_int(d));
return true;
}
if (m_util.is_mul(n)) {
expr_ref_vector muls(m());
muls.push_back(n);
expr* n1, *n2;
rational r1, r2;
for (unsigned i = 0; i < muls.size(); ++i) {
if (m_util.is_mul(muls[i].get(), n1, n2)) {
muls[i] = n1;
muls.push_back(n2);
--i;
}
}
if (m_util.is_numeral(d, r1) && !r1.is_zero()) {
for (unsigned i = 0; i < muls.size(); ++i) {
if (m_util.is_numeral(muls[i].get(), r2) && (r2 / r1).is_int()) {
muls[i] = m_util.mk_numeral(r2 / r1, m_util.is_int(d));
quot = m_util.mk_mul(muls.size(), muls.c_ptr());
return true;
}
}
}
else {
for (unsigned i = 0; i < muls.size(); ++i) {
if (d == muls[i].get()) {
muls[i] = muls.back();
muls.pop_back();
quot = m_util.mk_mul(muls.size(), muls.c_ptr());
return true;
}
}
}
}
return false;
}
br_status arith_rewriter::mk_mod_core(expr * arg1, expr * arg2, expr_ref & result) {
set_curr_sort(m().get_sort(arg1));
numeral v1, v2;

1
src/ast/rewriter/arith_rewriter.h
View file

@ -90,6 +90,7 @@ class arith_rewriter : public poly_rewriter<arith_rewriter_core> {
bool is_pi_integer_offset(expr * t, expr * & m);
expr * mk_sin_value(rational const & k);
app * mk_sqrt(rational const & k);
bool divides(expr* d, expr* n, expr_ref& quot);
public:
arith_rewriter(ast_manager & m, params_ref const & p = params_ref()):

45
src/ast/simplifier/arith_simplifier_plugin.cpp
View file

@ -267,10 +267,55 @@ void arith_simplifier_plugin::mk_idiv(expr * arg1, expr * arg2, expr_ref & resul
bool is_int;
if (m_util.is_numeral(arg1, v1, is_int) && m_util.is_numeral(arg2, v2, is_int) && !v2.is_zero())
result = m_util.mk_numeral(div(v1, v2), is_int);
else if (divides(arg2, arg1, result)) {
result = m_util.mk_mul(result, m_util.mk_idiv(arg2, arg2));
}
else
result = m_util.mk_idiv(arg1, arg2);
}
bool arith_simplifier_plugin::divides(expr* d, expr* n, expr_ref& quot) {
ast_manager& m = m_manager;
if (d == n) {
quot = m_util.mk_numeral(rational(1), m_util.is_int(d));
return true;
}
if (m_util.is_mul(n)) {
expr_ref_vector muls(m);
muls.push_back(n);
expr* n1, *n2;
rational r1, r2;
for (unsigned i = 0; i < muls.size(); ++i) {
if (m_util.is_mul(muls[i].get(), n1, n2)) {
muls[i] = n1;
muls.push_back(n2);
--i;
}
}
if (m_util.is_numeral(d, r1) && !r1.is_zero()) {
for (unsigned i = 0; i < muls.size(); ++i) {
if (m_util.is_numeral(muls[i].get(), r2) && (r2 / r1).is_int()) {
muls[i] = m_util.mk_numeral(r2 / r1, m_util.is_int(d));
quot = m_util.mk_mul(muls.size(), muls.c_ptr());
return true;
}
}
}
else {
for (unsigned i = 0; i < muls.size(); ++i) {
if (d == muls[i].get()) {
muls[i] = muls.back();
muls.pop_back();
quot = m_util.mk_mul(muls.size(), muls.c_ptr());
return true;
}
}
}
}
return false;
}
void arith_simplifier_plugin::prop_mod_const(expr * e, unsigned depth, numeral const& k, expr_ref& result) {
SASSERT(m_util.is_int(e));
SASSERT(k.is_int() && k.is_pos());

1
src/ast/simplifier/arith_simplifier_plugin.h
View file

@ -48,6 +48,7 @@ protected:
void div_monomial(expr_ref_vector& monomials, numeral const& g);
void get_monomial_gcd(expr_ref_vector& monomials, numeral& g);
bool divides(expr* d, expr* n, expr_ref& quot);
public:
arith_simplifier_plugin(ast_manager & m, basic_simplifier_plugin & b, arith_simplifier_params & p);

1
src/smt/smt_model_generator.cpp
View file

@ -388,6 +388,7 @@ namespace smt {
enode * n = *it3;
if (is_uninterp_const(n->get_owner()) && m_context->is_relevant(n)) {
func_decl * d = n->get_owner()->get_decl();
TRACE("mg_top_sort", tout << d->get_name() << " " << (m_hidden_ufs.contains(d)?"hidden":"visible") << "\n";);
if (m_hidden_ufs.contains(d)) continue;
expr * val = get_value(n);
m_model->register_decl(d, val);

30
src/smt/theory_lra.cpp
View file

@ -425,8 +425,11 @@ namespace smt {
void internalize_mul(app* t, theory_var& v, rational& r) {
SASSERT(a.is_mul(t));
internalize_args(t);
mk_enode(t);
bool _has_var = has_var(t);
if (!_has_var) {
internalize_args(t);
mk_enode(t);
}
r = rational::one();
rational r1;
v = mk_var(t);
@ -451,7 +454,10 @@ namespace smt {
vars.push_back(get_var_index(mk_var(n)));
}
}
m_solver->add_monomial(get_var_index(v), vars);
TRACE("arith", tout << mk_pp(t, m) << "\n";);
if (!_has_var) {
m_solver->add_monomial(get_var_index(v), vars);
}
}
enode * mk_enode(app * n) {
@ -498,6 +504,14 @@ namespace smt {
return m_arith_params.m_arith_reflect || is_underspecified(n);
}
bool has_var(expr* n) {
if (!ctx().e_internalized(n)) {
return false;
}
enode* e = get_enode(n);
return th.is_attached_to_var(e);
}
theory_var mk_var(expr* n, bool internalize = true) {
if (!ctx().e_internalized(n)) {
ctx().internalize(n, false);
@ -2281,6 +2295,7 @@ namespace smt {
}
void set_conflict() {
m_explanation.clear();
m_solver->get_infeasibility_explanation(m_explanation);
set_conflict1();
}
@ -2289,7 +2304,6 @@ namespace smt {
m_eqs.reset();
m_core.reset();
m_params.reset();
m_explanation.clear();
// m_solver->shrink_explanation_to_minimum(m_explanation); // todo, enable when perf is fixed
/*
static unsigned cn = 0;
@ -2340,7 +2354,10 @@ namespace smt {
model_value_proc * mk_value(enode * n, model_generator & mg) {
theory_var v = n->get_th_var(get_id());
return alloc(expr_wrapper_proc, m_factory->mk_value(get_value(v), m.get_sort(n->get_owner())));
expr* o = n->get_owner();
rational r = get_value(v);
if (a.is_int(o) && !r.is_int()) r = floor(r);
return alloc(expr_wrapper_proc, m_factory->mk_value(r, m.get_sort(o)));
}
bool get_value(enode* n, expr_ref& r) {
@ -2366,6 +2383,7 @@ namespace smt {
if (dump_lemmas()) {
ctx().display_lemma_as_smt_problem(m_core.size(), m_core.c_ptr(), m_eqs.size(), m_eqs.c_ptr(), false_literal);
}
if (m_arith_params.m_arith_mode == AS_LRA) return true;
context nctx(m, ctx().get_fparams(), ctx().get_params());
add_background(nctx);
bool result = l_true != nctx.check();
@ -2378,6 +2396,7 @@ namespace smt {
if (dump_lemmas()) {
ctx().display_lemma_as_smt_problem(m_core.size(), m_core.c_ptr(), m_eqs.size(), m_eqs.c_ptr(), lit);
}
if (m_arith_params.m_arith_mode == AS_LRA) return true;
context nctx(m, ctx().get_fparams(), ctx().get_params());
m_core.push_back(~lit);
add_background(nctx);
@ -2389,6 +2408,7 @@ namespace smt {
}
bool validate_eq(enode* x, enode* y) {
if (m_arith_params.m_arith_mode == AS_LRA) return true;
context nctx(m, ctx().get_fparams(), ctx().get_params());
add_background(nctx);
nctx.assert_expr(m.mk_not(m.mk_eq(x->get_owner(), y->get_owner())));