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#4923 - eq2bv

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-01-08 16:38:07 -08:00
parent 690bc51b7f
commit ffd57bef24
1 changed files with 28 additions and 30 deletions
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58
src/tactic/arith/eq2bv_tactic.cpp
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@ -151,7 +151,7 @@ public:
expr_ref_vector m_trail;
bound_manager m_bounds;
obj_map<expr, expr*> m_fd;
obj_map<expr, unsigned> m_max;
obj_map<expr, rational> m_max;
expr_mark m_nonfd;
expr_mark m_has_eq;
ptr_vector<expr> m_todo;
@ -278,32 +278,34 @@ public:
void cleanup_fd(ref<bvmc>& mc) {
SASSERT(m_fd.empty());
ptr_vector<expr> rm;
for (auto& kv : m_max)
if (m_nonfd.is_marked(kv.m_key))
rm.push_back(kv.m_key);
for (expr* r : rm)
m_max.erase(r);
for (auto& kv : m_max) {
expr* key = kv.m_key;
rational& value = kv.m_value;
if (m_nonfd.is_marked(key)) {
rm.push_back(key);
continue;
}
// ensure there are enough elements.
bool strict;
rational val;
if (m_bounds.has_upper(kv.m_key, val, strict)) {
SASSERT(!strict);
if (val.get_unsigned() > kv.m_value) kv.m_value = val.get_unsigned();
}
else {
++kv.m_value;
}
if (m_bounds.has_lower(kv.m_key, val, strict)) {
SASSERT(!strict);
if (val.get_unsigned() > kv.m_value) kv.m_value = val.get_unsigned();
}
unsigned p = next_power_of_two(kv.m_value);
rational bound;
if (m_bounds.has_upper(key, bound, strict))
value = std::max(value, bound);
else
++value;
if (m_bounds.has_lower(key, bound, strict))
value = std::max(value, bound);
++value;
}
for (expr* r : rm)
m_max.erase(r);
for (auto& kv : m_max) {
unsigned p = kv.m_value.get_num_bits();
if (p <= 1) p = 2;
if (kv.m_value == p) p *= 2;
unsigned n = log2(p);
SASSERT(p >= kv.m_value);
app* z = m.mk_fresh_const("z", bv.mk_sort(n));
app* z = m.mk_fresh_const("z", bv.mk_sort(p));
m_trail.push_back(z);
m_fd.insert(kv.m_key, z);
mc->insert(z->get_decl(), to_app(kv.m_key)->get_decl());
@ -385,20 +387,16 @@ public:
}
bool is_fd(expr* v, expr* c) {
unsigned val;
rational r;
if (is_uninterp_const(v) && a.is_numeral(c, r) && !m_nonfd.is_marked(v) && a.is_int(v) && r.is_unsigned()) {
val = r.get_unsigned();
if (val > UINT_MAX/4)
return false;
add_fd(v, val);
add_fd(v, r);
return true;
}
return false;
}
void add_fd(expr* c, unsigned val) {
unsigned val2;
void add_fd(expr* c, rational val) {
rational val2;
if (!m_max.find(c, val2) || val2 < val) {
m_max.insert(c, val);
}