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Pobs are always managed

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Removed options to allow unmanaged pobs.
Other minor cleanups.
This commit is contained in:
Arie Gurfinkel 2018-06-26 21:36:18 -04:00
parent 1910b4c87c
commit c00c6b4285
3 changed files with 37 additions and 42 deletions
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26
src/muz/spacer/spacer_context.cpp
View file

@ -137,15 +137,15 @@ void pob::get_skolems(app_ref_vector &v) {
pob* pob_queue::top ()
{
/// nothing in the queue
if (m_obligations.empty()) { return nullptr; }
if (m_data.empty()) { return nullptr; }
/// top queue element is above max level
if (m_obligations.top()->level() > m_max_level) { return nullptr; }
if (m_data.top()->level() > m_max_level) { return nullptr; }
/// top queue element is at the max level, but at a higher than base depth
if (m_obligations.top ()->level () == m_max_level &&
m_obligations.top()->depth() > m_min_depth) { return nullptr; }
if (m_data.top ()->level () == m_max_level &&
m_data.top()->depth() > m_min_depth) { return nullptr; }
/// there is something good in the queue
return m_obligations.top ().get ();
return m_data.top ();
}
void pob_queue::set_root(pob& root)
@ -160,14 +160,14 @@ pob_queue::~pob_queue() {}
void pob_queue::reset()
{
while (!m_obligations.empty()) { m_obligations.pop(); }
if (m_root) { m_obligations.push(m_root); }
while (!m_data.empty()) { m_data.pop(); }
if (m_root) { m_data.push(m_root.get()); }
}
void pob_queue::push(pob &n) {
TRACE("pob_queue",
tout << "pob_queue::push(" << n.post()->get_id() << ")\n";);
m_obligations.push (&n);
m_data.push (&n);
n.get_context().new_pob_eh(&n);
}
@ -2127,13 +2127,6 @@ pob* pred_transformer::pob_manager::mk_pob(pob *parent,
unsigned level, unsigned depth,
expr *post,
app_ref_vector const &b) {
if (!m_pt.ctx.reuse_pobs()) {
pob* n = alloc(pob, parent, m_pt, level, depth);
n->set_post(post, b);
return n;
}
// create a new pob and set its post to normalize it
pob p(parent, m_pt, level, depth, false);
p.set_post(post, b);
@ -2211,7 +2204,6 @@ void context::updt_params() {
m_use_ctp = m_params.spacer_ctp();
m_use_inc_clause = m_params.spacer_use_inc_clause();
m_blast_term_ite = m_params.spacer_blast_term_ite();
m_reuse_pobs = m_params.spacer_reuse_pobs();
m_use_ind_gen = m_params.spacer_use_inductive_generalizer();
m_use_array_eq_gen = m_params.spacer_use_array_eq_generalizer();
m_validate_lemmas = m_params.spacer_validate_lemmas();
@ -3936,7 +3928,7 @@ bool context::is_inductive() {
}
/// pob_lt operator
inline bool pob_lt::operator() (const pob *pn1, const pob *pn2) const
inline bool pob_lt_proc::operator() (const pob *pn1, const pob *pn2) const
{
SASSERT (pn1);
SASSERT (pn2);

52
src/muz/spacer/spacer_context.h
View file

@ -270,14 +270,27 @@ class pred_transformer {
/**
manager of proof-obligations (pob_manager)
Pobs are determined uniquely by their post-condition and a parent pob.
They are managed by pob_manager and remain live through the
life of the manager
*/
class pob_manager {
// a buffer that contains space for one pob and allocates more
// space if needed
typedef ptr_buffer<pob, 1> pob_buffer;
// Type for the map from post-conditions to pobs. The common
// case is that each post-condition corresponds to a single
// pob. Other cases are handled by expanding the buffer
typedef obj_map<expr, pob_buffer > expr2pob_buffer;
// parent predicate transformer
pred_transformer &m_pt;
// map from post-conditions to pobs
expr2pob_buffer m_pobs;
// a store
pob_ref_vector m_pinned;
public:
pob_manager(pred_transformer &pt) : m_pt(pt) {}
@ -673,22 +686,14 @@ public:
};
struct pob_lt :
public std::binary_function<const pob*, const pob*, bool>
{bool operator() (const pob *pn1, const pob *pn2) const;};
struct pob_gt :
public std::binary_function<const pob*, const pob*, bool> {
pob_lt lt;
bool operator() (const pob *n1, const pob *n2) const
{return lt(n2, n1);}
struct pob_lt_proc : public std::binary_function<const pob*, const pob*, bool> {
bool operator() (const pob *pn1, const pob *pn2) const;
};
struct pob_ref_gt :
public std::binary_function<const pob_ref&, const model_ref &, bool> {
pob_gt gt;
bool operator() (const pob_ref &n1, const pob_ref &n2) const
{return gt (n1.get (), n2.get ());}
struct pob_gt_proc : public std::binary_function<const pob*, const pob*, bool> {
bool operator() (const pob *n1, const pob *n2) const {
return pob_lt_proc()(n2, n1);
}
};
/**
@ -767,36 +772,37 @@ public:
class pob_queue {
typedef std::priority_queue<pob*, std::vector<pob*>, pob_gt_proc> pob_queue_ty;
pob_ref m_root;
unsigned m_max_level;
unsigned m_min_depth;
std::priority_queue<pob_ref, std::vector<pob_ref>,
pob_ref_gt> m_obligations;
pob_queue_ty m_data;
public:
pob_queue(): m_root(nullptr), m_max_level(0), m_min_depth(0) {}
~pob_queue();
void reset();
pob * top ();
void pop () {m_obligations.pop ();}
pob* top();
void pop() {m_data.pop ();}
void push (pob &n);
void inc_level () {
SASSERT (!m_obligations.empty () || m_root);
SASSERT (!m_data.empty () || m_root);
m_max_level++;
m_min_depth++;
if (m_root && m_obligations.empty()) { m_obligations.push(m_root); }
if (m_root && m_data.empty()) { m_data.push(m_root.get()); }
}
pob& get_root() const {return *m_root.get ();}
void set_root(pob& n);
bool is_root (pob& n) const {return m_root.get () == &n;}
bool is_root(pob& n) const {return m_root.get () == &n;}
unsigned max_level() const {return m_max_level;}
unsigned min_depth() const {return m_min_depth;}
size_t size() const {return m_obligations.size();}
size_t size() const {return m_data.size();}
};
@ -910,7 +916,6 @@ class context {
bool m_use_ctp;
bool m_use_inc_clause;
bool m_blast_term_ite;
bool m_reuse_pobs;
bool m_use_ind_gen;
bool m_use_array_eq_gen;
bool m_validate_lemmas;
@ -1007,7 +1012,6 @@ public:
bool use_ctp() {return m_use_ctp;}
bool use_inc_clause() {return m_use_inc_clause;}
bool blast_term_ite() {return m_blast_term_ite;}
bool reuse_pobs() {return m_reuse_pobs;}
bool elim_aux() {return m_elim_aux;}
bool reach_dnf() {return m_reach_dnf;}