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#5215

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-04-27 15:26:56 -07:00
parent a71b4fab23
commit e5892e5e97
4 changed files with 25 additions and 3 deletions
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12
src/sat/smt/bv_invariant.cpp
View file

@ -93,8 +93,16 @@ namespace bv {
} while (curr != v);
zero_one_bits const& _bits = m_zero_one_bits[v];
if (_bits.size() != num_bits)
std::cout << v << " " << _bits.size() << " " << num_bits << "\n";
if (_bits.size() != num_bits) {
std::cout << "v" << v << " " << _bits.size() << " " << num_bits << "\n";
std::cout << "true: " << mk_true() << "\n";
do {
std::cout << "v" << curr << ": " << m_bits[curr] << "\n";
curr = m_find.next(curr);
}
while (curr != v);
}
SASSERT(_bits.size() == num_bits);
VERIFY(_bits.size() == num_bits);
bool_vector already_found;
already_found.resize(bv_sz, false);

2
src/sat/smt/bv_solver.cpp
View file

@ -664,7 +664,7 @@ namespace bv {
result->set_solver(&ctx.s());
for (theory_var i = 0; i < static_cast<theory_var>(get_num_vars()); ++i)
if (find(i) != i)
result->m_find.merge(i, find(i));
result->m_find.set_root(i, find(i));
result->m_prop_queue.append(m_prop_queue);
for (unsigned i = 0; i < m_bool_var2atom.size(); ++i) {
atom* a = m_bool_var2atom[i];

6
src/sat/smt/bv_solver.h
View file

@ -102,6 +102,9 @@ namespace bv {
unsigned m_is_true:1;
zero_one_bit(theory_var v = euf::null_theory_var, unsigned idx = UINT_MAX, bool is_true = false):
m_owner(v), m_idx(idx), m_is_true(is_true) {}
std::ostream& display(std::ostream& out) const {
return out << "v" << m_owner << " @ " << m_idx << " " << (m_is_true?"T":"F");
}
};
typedef svector<zero_one_bit> zero_one_bits;
@ -367,9 +370,12 @@ namespace bv {
typedef std::pair<solver const*, theory_var> pp_var;
pp_var pp(theory_var v) const { return pp_var(this, v); }
friend std::ostream& operator<<(std::ostream& out, solver::zero_one_bit const& zo) { return zo.display(out); }
};
inline std::ostream& operator<<(std::ostream& out, solver::pp_var const& p) { return p.first->display(out, p.second); }
}

8
src/util/union_find.h
View file

@ -134,6 +134,14 @@ public:
CASSERT("union_find", check_invariant());
}
void set_root(unsigned v, unsigned root) {
TRACE("union_find", tout << "merging " << v << " " << root << "\n";);
SASSERT(v != root);
m_find[v] = root;
m_size[root] += m_size[v];
std::swap(m_next[root], m_next[v]);
}
// dissolve equivalence class of v
// this method cannot be used with backtracking.
void dissolve(unsigned v) {