Z3 sources

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

lib/smt_context_stat.cpp

@@ -0,0 +1,159 @@
+/*++
+Copyright (c) 2006 Microsoft Corporation
+
+Module Name:
+
+    smt_context_stat.cpp
+
+Abstract:
+
+    <abstract>
+
+Author:
+
+    Leonardo de Moura (leonardo) 2008-03-06.
+
+Revision History:
+
+--*/
+#include"smt_context.h"
+#include"ast_pp.h"
+
+namespace smt {
+
+    unsigned context::get_lemma_avg_activity() const {
+        if (m_lemmas.empty())
+            return 0;
+        unsigned long long acc            = 0;
+        clause_vector::const_iterator it  = m_lemmas.begin();
+        clause_vector::const_iterator end = m_lemmas.end();
+        for (; it != end; ++it)
+            acc += (*it)->get_activity();
+        return static_cast<unsigned>(acc / m_lemmas.size());
+    }
+
+    void acc_num_occs(clause * cls, unsigned_vector & lit2num_occs) {
+        unsigned num_lits = cls->get_num_literals();
+        for (unsigned i = 0; i < num_lits; i++) {
+            literal l = cls->get_literal(i);
+            lit2num_occs[l.index()]++;
+        }
+    }
+
+    void acc_num_occs(clause_vector const & v, unsigned_vector & lit2num_occs) {
+        clause_vector::const_iterator it  = v.begin();
+        clause_vector::const_iterator end = v.end();
+        for (; it != end; ++it)
+            acc_num_occs(*it, lit2num_occs);
+    }
+
+    void context::display_literal_num_occs(std::ostream & out) const {
+        unsigned num_lits = m_assignment.size();
+        unsigned_vector lit2num_occs;
+        lit2num_occs.resize(num_lits, 0);
+        acc_num_occs(m_aux_clauses, lit2num_occs);
+        acc_num_occs(m_lemmas, lit2num_occs);
+        for (unsigned lidx = 0; lidx < num_lits; lidx++) {
+            literal l = to_literal(lidx);
+            if (lit2num_occs[lidx] > 0) {
+                out << lit2num_occs[lidx] << " ";
+                // display_literal(out, l);
+                out << l.sign() << " " << mk_pp(bool_var2expr(l.var()), m_manager);
+                out << "\n";
+            }
+        }
+    }
+
+    void context::display_num_assigned_literals_per_lvl(std::ostream & out) const {
+        unsigned n = 0;
+        svector<scope>::const_iterator it  = m_scopes.begin();
+        svector<scope>::const_iterator end = m_scopes.end();
+        out << "[";
+        for (; it != end; ++it) {
+            scope const & s = *it;
+            SASSERT(n <= s.m_assigned_literals_lim);
+            out << (s.m_assigned_literals_lim - n) << " ";
+            n = s.m_assigned_literals_lim;
+        }
+        SASSERT(n <= m_assigned_literals.size());
+        out << (m_assigned_literals.size() - n) << "]";
+    }
+
+    void acc_var_num_occs(clause * cls, unsigned_vector & var2num_occs) {
+        unsigned num_lits = cls->get_num_literals();
+        for (unsigned i = 0; i < num_lits; i++) {
+            literal l = cls->get_literal(i);
+            var2num_occs[l.var()]++;
+        }
+    }
+
+    void acc_var_num_occs(clause_vector const & v, unsigned_vector & var2num_occs) {
+        clause_vector::const_iterator it  = v.begin();
+        clause_vector::const_iterator end = v.end();
+        for (; it != end; ++it)
+            acc_var_num_occs(*it, var2num_occs);
+    }
+
+    void context::display_var_occs_histogram(std::ostream & out) const {
+        unsigned num_vars = get_num_bool_vars();
+        unsigned_vector var2num_occs;
+        var2num_occs.resize(num_vars, 0);
+        acc_var_num_occs(m_aux_clauses, var2num_occs);
+        acc_var_num_occs(m_lemmas, var2num_occs);
+        unsigned_vector histogram;
+        for (unsigned v = 0; v < num_vars; v++) {
+            unsigned num_occs = var2num_occs[v];
+            histogram.reserve(num_occs+1, 0);
+            histogram[num_occs]++;
+        }
+        out << "number of atoms having k occs:\n"; 
+        unsigned sz = histogram.size();
+        for (unsigned i = 1; i < sz; i++)
+            if (histogram[i] > 0)
+                out << i << ":" << histogram[i] << " ";
+        out << "\n";
+    }
+
+    void acc_var_num_min_occs(clause * cls, unsigned_vector & var2num_min_occs) {
+        unsigned num_lits = cls->get_num_literals();
+        bool_var min_var  = cls->get_literal(0).var();
+        for (unsigned i = 1; i < num_lits; i++) {
+            bool_var v = cls->get_literal(i).var();
+            if (v < min_var)
+                min_var = v;
+        }
+        var2num_min_occs[min_var]++;
+    }
+
+    void acc_var_num_min_occs(clause_vector const & v, unsigned_vector & var2num_min_occs) {
+        clause_vector::const_iterator it  = v.begin();
+        clause_vector::const_iterator end = v.end();
+        for (; it != end; ++it)
+            acc_var_num_min_occs(*it, var2num_min_occs);
+    }
+
+    void context::display_num_min_occs(std::ostream & out) const {
+        unsigned num_vars = get_num_bool_vars();
+        unsigned_vector var2num_min_occs;
+        var2num_min_occs.resize(num_vars, 0);
+        acc_var_num_min_occs(m_aux_clauses, var2num_min_occs);
+        acc_var_num_min_occs(m_lemmas, var2num_min_occs);
+        out << "number of min occs:\n";
+        for (unsigned v = 0; v < num_vars; v++) {
+            if (var2num_min_occs[v] > 0)
+                out << v << ":" << var2num_min_occs[v] << " ";
+        }
+        out << "\n";
+    }
+
+    void context::display_profile_res_sub(std::ostream & out) const {
+        display_var_occs_histogram(std::cerr);
+        display_num_min_occs(std::cerr);
+        std::cerr << "\n";
+    }
+
+    void context::display_profile(std::ostream & out) const {
+        if (m_fparams.m_profile_res_sub)
+            display_profile_res_sub(out);
+    }
+};