diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 000000000..b86ed5df7
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1 @@
+src/api/dotnet/Properties/AssemblyInfo.cs text eol=crlf
diff --git a/src/math/realclosure/realclosure.cpp b/src/math/realclosure/realclosure.cpp
index 87b1ef8a4..84ba606fd 100644
--- a/src/math/realclosure/realclosure.cpp
+++ b/src/math/realclosure/realclosure.cpp
@@ -660,8 +660,7 @@ namespace realclosure {
                 return; // interval was already saved.
             to_restore.push_back(v);
             inc_ref(v);
-	    void * mem = allocator().allocate(sizeof(mpbqi));
-            v->m_old_interval = new (mem) mpbqi();
+            v->m_old_interval = new (allocator()) mpbqi();
             set_interval(*(v->m_old_interval), v->m_interval);
         }
         void save_interval(value * v) {
@@ -1237,8 +1236,7 @@ namespace realclosure {
         }
 
         sign_condition * mk_sign_condition(unsigned qidx, int sign, sign_condition * prev_sc) {
-	    void * mem = allocator().allocate(sizeof(sign_condition));
-            return new (mem) sign_condition(qidx, sign, prev_sc);
+            return new (allocator()) sign_condition(qidx, sign, prev_sc);
         }
 
         /**
@@ -1246,7 +1244,7 @@ namespace realclosure {
            This method does not set the interval. It remains (-oo, oo)
         */
         rational_function_value * mk_rational_function_value_core(extension * ext, unsigned num_sz, value * const * num, unsigned den_sz, value * const * den) {
-            rational_function_value * r = alloc(rational_function_value, ext);
+            rational_function_value * r = new (allocator()) rational_function_value(ext);
             inc_ref(ext);
             set_p(r->num(), num_sz, num);
             if (ext->is_algebraic()) {
@@ -1283,7 +1281,7 @@ namespace realclosure {
         */
         void mk_infinitesimal(symbol const & n, symbol const & pp_n, numeral & r) {
             unsigned idx = next_infinitesimal_idx();
-            infinitesimal * eps = alloc(infinitesimal, idx, n, pp_n);
+            infinitesimal * eps = new (allocator()) infinitesimal(idx, n, pp_n);
             m_extensions[extension::INFINITESIMAL].push_back(eps);
 
             set_lower(eps->interval(), mpbq(0));
@@ -1335,7 +1333,7 @@ namespace realclosure {
 
         void mk_transcendental(symbol const & n, symbol const & pp_n, mk_interval & proc, numeral & r) {
             unsigned idx = next_transcendental_idx();
-            transcendental * t = alloc(transcendental, idx, n, pp_n, proc);
+            transcendental * t = new (allocator()) transcendental(idx, n, pp_n, proc);
             m_extensions[extension::TRANSCENDENTAL].push_back(t);
             
             while (contains_zero(t->interval())) {
@@ -1798,8 +1796,7 @@ namespace realclosure {
            M and scs will be empty after this operation.
         */
         sign_det * mk_sign_det(mpz_matrix & M_s, scoped_polynomial_seq const & prs, int_buffer const & taqrs, scoped_polynomial_seq const & qs, scoped_sign_conditions & scs) {
-	    void * mem = allocator().allocate(sizeof(sign_det));
-            sign_det * r = new (mem) sign_det();
+            sign_det * r = new (allocator()) sign_det();
             r->M_s.swap(M_s);
             set_array_p(r->m_prs, prs);
             r->m_taqrs.set(allocator(), taqrs.size(), taqrs.c_ptr());
@@ -1814,8 +1811,7 @@ namespace realclosure {
          */
         algebraic * mk_algebraic(unsigned p_sz, value * const * p, mpbqi const & interval, mpbqi const & iso_interval, sign_det * sd, unsigned sc_idx) {
             unsigned idx = next_algebraic_idx();
-	    void * mem = allocator().allocate(sizeof(algebraic));
-            algebraic * r = new (mem) algebraic(idx);
+            algebraic * r = new (allocator()) algebraic(idx);
             m_extensions[extension::ALGEBRAIC].push_back(r);
             
             set_p(r->m_p, p_sz, p);
@@ -2561,8 +2557,7 @@ namespace realclosure {
         }
 
         rational_value * mk_rational() {
-	    void * mem = allocator().allocate(sizeof(rational_value));
-            return new (mem) rational_value();
+            return new (allocator()) rational_value();
         }
 
         /**
diff --git a/src/muz_qe/dl_mk_interp_tail_simplifier.cpp b/src/muz_qe/dl_mk_interp_tail_simplifier.cpp
index 51bbd52df..d0b94f582 100644
--- a/src/muz_qe/dl_mk_interp_tail_simplifier.cpp
+++ b/src/muz_qe/dl_mk_interp_tail_simplifier.cpp
@@ -583,11 +583,12 @@ namespace datalog {
         }
 
         rule_set * res = alloc(rule_set, m_context);
-        if (!transform_rules(source, *res)) {
+        if (transform_rules(source, *res)) {
+            res->inherit_predicates(source);
+        } else {
             dealloc(res);
             res = 0;
         }
-        res->inherit_predicates(source);
         return res;
     }
   
diff --git a/src/muz_qe/dl_mk_rule_inliner.cpp b/src/muz_qe/dl_mk_rule_inliner.cpp
index c6ffa1378..8428d9049 100644
--- a/src/muz_qe/dl_mk_rule_inliner.cpp
+++ b/src/muz_qe/dl_mk_rule_inliner.cpp
@@ -667,7 +667,7 @@ namespace datalog {
         return et->get_data().m_value;
     }
 
-    void mk_rule_inliner::add_rule(rule* r, unsigned i) {
+    void mk_rule_inliner::add_rule(rule_set const& source, rule* r, unsigned i) {
         svector<bool>& can_remove = m_head_visitor.can_remove();
         svector<bool>& can_expand = m_head_visitor.can_expand();
         app* head = r->get_head();
@@ -676,7 +676,7 @@ namespace datalog {
         m_head_index.insert(head);
         m_pinned.push_back(r);
             
-        if (m_context.get_rules().is_output_predicate(headd) ||
+        if (source.is_output_predicate(headd) ||
             m_preds_with_facts.contains(headd)) {
             can_remove.set(i, false);
             TRACE("dl", output_predicate(m_context, head, tout << "cannot remove: " << i << " "); tout << "\n";);
@@ -692,7 +692,7 @@ namespace datalog {
             tl_sz == 1
             && r->get_positive_tail_size() == 1 
             && !m_preds_with_facts.contains(r->get_decl(0)) 
-            && !m_context.get_rules().is_output_predicate(r->get_decl(0));
+            && !source.is_output_predicate(r->get_decl(0));
         can_expand.set(i, can_exp);
     }
 
@@ -709,7 +709,7 @@ namespace datalog {
 
 #define PRT(_x_) ((_x_)?"T":"F")
 
-    bool mk_rule_inliner::inline_linear(scoped_ptr<rule_set>& rules) {
+    bool mk_rule_inliner::inline_linear(rule_set const& source, scoped_ptr<rule_set>& rules) {
         scoped_ptr<rule_set> res = alloc(rule_set, m_context);
         bool done_something = false;        
         unsigned sz = rules->get_num_rules();
@@ -731,7 +731,7 @@ namespace datalog {
         svector<bool>& can_expand = m_head_visitor.can_expand();
 
         for (unsigned i = 0; i < sz; ++i) {
-            add_rule(acc[i].get(), i);
+            add_rule(source, acc[i].get(), i);
         }
 
         // initialize substitution.
@@ -808,7 +808,7 @@ namespace datalog {
                 TRACE("dl", r->display(m_context, tout); r2->display(m_context, tout); rl_res->display(m_context, tout); );
 
                 del_rule(r, i);
-                add_rule(rl_res.get(), i);
+                add_rule(source, rl_res.get(), i);
                 
 
                 r = rl_res;
@@ -875,7 +875,7 @@ namespace datalog {
             TRACE("dl", res->display(tout << "after eager inlining\n"););
         }
 
-        if (m_context.get_params().inline_linear() && inline_linear(res)) {
+        if (m_context.get_params().inline_linear() && inline_linear(source, res)) {
             something_done = true;
         }
 
diff --git a/src/muz_qe/dl_mk_rule_inliner.h b/src/muz_qe/dl_mk_rule_inliner.h
index bec788ffe..476c6b4b0 100644
--- a/src/muz_qe/dl_mk_rule_inliner.h
+++ b/src/muz_qe/dl_mk_rule_inliner.h
@@ -172,9 +172,9 @@ namespace datalog {
         /**
            Inline predicates that are known to not be join-points.
          */
-        bool inline_linear(scoped_ptr<rule_set>& rules);
+        bool inline_linear(rule_set const& source, scoped_ptr<rule_set>& rules);
 
-        void add_rule(rule* r, unsigned i);
+        void add_rule(rule_set const& rule_set, rule* r, unsigned i);
         void del_rule(rule* r, unsigned i);
 
     public:
diff --git a/src/muz_qe/dl_mk_similarity_compressor.cpp b/src/muz_qe/dl_mk_similarity_compressor.cpp
index 969f1444a..040cbfa78 100644
--- a/src/muz_qe/dl_mk_similarity_compressor.cpp
+++ b/src/muz_qe/dl_mk_similarity_compressor.cpp
@@ -429,7 +429,7 @@ namespace datalog {
         m_modified = true;
     }
 
-    void mk_similarity_compressor::process_class(rule_vector::iterator first, 
+    void mk_similarity_compressor::process_class(rule_set const& source, rule_vector::iterator first, 
             rule_vector::iterator after_last) {
         SASSERT(first!=after_last);
         //remove duplicates
@@ -487,7 +487,7 @@ namespace datalog {
         //TODO: compress also rules with pairs (or tuples) of equal constants
 
 #if 1
-        if (const_cnt>0) {
+        if (const_cnt>0 && !source.is_output_predicate((*first)->get_decl())) {
             unsigned rule_cnt = static_cast<unsigned>(after_last-first);
             if (rule_cnt>m_threshold_count) {
                 merge_class(first, after_last);
@@ -521,7 +521,7 @@ namespace datalog {
             rule_vector::iterator prev = it;
             ++it;
             if (it==end || rough_compare(*prev, *it)!=0) {
-                process_class(cl_begin, it);
+                process_class(source, cl_begin, it);
                 cl_begin = it;
             }
         }
diff --git a/src/muz_qe/dl_mk_similarity_compressor.h b/src/muz_qe/dl_mk_similarity_compressor.h
index 6e0ca9db5..49704b8cd 100644
--- a/src/muz_qe/dl_mk_similarity_compressor.h
+++ b/src/muz_qe/dl_mk_similarity_compressor.h
@@ -63,7 +63,7 @@ namespace datalog {
         ast_ref_vector      m_pinned;
         
         void merge_class(rule_vector::iterator first, rule_vector::iterator after_last);
-        void process_class(rule_vector::iterator first, rule_vector::iterator after_last);
+        void process_class(rule_set const& source, rule_vector::iterator first, rule_vector::iterator after_last);
 
         void reset();
     public:
diff --git a/src/muz_qe/dl_rule_set.cpp b/src/muz_qe/dl_rule_set.cpp
index b0bcdec89..cb129ab37 100644
--- a/src/muz_qe/dl_rule_set.cpp
+++ b/src/muz_qe/dl_rule_set.cpp
@@ -332,15 +332,12 @@ namespace datalog {
 
     void rule_set::inherit_predicates(rule_set const& other) {
         m_refs.append(other.m_refs);
-        SASSERT(m_refs.size() < 1000);
         set_union(m_output_preds, other.m_output_preds);
         {
             obj_map<func_decl, func_decl*>::iterator it = other.m_orig2pred.begin();
             obj_map<func_decl, func_decl*>::iterator end = other.m_orig2pred.end();
             for (; it != end; ++it) {
                 m_orig2pred.insert(it->m_key, it->m_value);
-                m_refs.push_back(it->m_key);
-                m_refs.push_back(it->m_value);
             }
         }
         {
@@ -348,8 +345,6 @@ namespace datalog {
             obj_map<func_decl, func_decl*>::iterator end = other.m_pred2orig.end();
             for (; it != end; ++it) {
                 m_pred2orig.insert(it->m_key, it->m_value);
-                m_refs.push_back(it->m_key);
-                m_refs.push_back(it->m_value);
             }
         }
     }
@@ -515,6 +510,11 @@ namespace datalog {
     void rule_set::display(std::ostream & out) const {
         out << "; rule count: " << get_num_rules() << "\n";
         out << "; predicate count: " << m_head2rules.size() << "\n";
+        func_decl_set::iterator pit = m_output_preds.begin();
+        func_decl_set::iterator pend = m_output_preds.end();
+        for (; pit != pend; ++pit) {
+            out << "; output: " << (*pit)->get_name() << '\n';
+        }
         decl2rules::iterator it  = m_head2rules.begin();
         decl2rules::iterator end = m_head2rules.end();
         for (; it != end; ++it) {
diff --git a/src/muz_qe/rel_context.cpp b/src/muz_qe/rel_context.cpp
index 0e84ce4f6..c5d25e74f 100644
--- a/src/muz_qe/rel_context.cpp
+++ b/src/muz_qe/rel_context.cpp
@@ -255,6 +255,8 @@ namespace datalog {
             m_context.transform_rules(alloc(mk_magic_sets, m_context, query_pred));
         }
 
+        query_pred = m_context.get_rules().get_pred(query_pred);
+
         lbool res = saturate();
         
         if (res != l_undef) {
diff --git a/src/test/rcf.cpp b/src/test/rcf.cpp
index d6cfd8b86..294a7df29 100644
--- a/src/test/rcf.cpp
+++ b/src/test/rcf.cpp
@@ -137,7 +137,6 @@ static void tst_lin_indep(unsigned m, unsigned n, int _A[], unsigned ex_sz, unsi
     r.resize(A.n());
     scoped_mpz_matrix B(mm);
     mm.linear_independent_rows(A, r.c_ptr(), B);
-    SASSERT(r.size() == ex_sz);
     for (unsigned i = 0; i < ex_sz; i++) {
         SASSERT(r[i] == ex_r[i]);
     }
@@ -164,7 +163,6 @@ void tst_rcf() {
     enable_trace("rcf_clean");
     enable_trace("rcf_clean_bug");
     tst_denominators();
-    return;
     tst1();
     tst2();
     { int A[] = {0, 1, 1, 1, 0, 1, 1, 1, -1}; int c[] = {10, 4, -4}; int b[] = {-2, 4, 6}; tst_solve(3, A, b, c, true); }
diff --git a/src/util/array.h b/src/util/array.h
index a3658c354..f983f7dec 100644
--- a/src/util/array.h
+++ b/src/util/array.h
@@ -122,7 +122,7 @@ public:
         if (m_data) {
             if (CallDestructors)
                 destroy_elements();
-            a.deallocate(size(), raw_ptr());
+            a.deallocate(space(size()), raw_ptr());
             m_data = 0;
         }
     }
diff --git a/src/util/small_object_allocator.h b/src/util/small_object_allocator.h
index 538a9e035..957c4f475 100644
--- a/src/util/small_object_allocator.h
+++ b/src/util/small_object_allocator.h
@@ -21,6 +21,7 @@ Revision History:
 #define _SMALL_OBJECT_ALLOCATOR_H_
 
 #include"machine.h"
+#include"debug.h"
 
 class small_object_allocator {
     static const unsigned CHUNK_SIZE     = (8192 - sizeof(void*)*2);
@@ -52,8 +53,8 @@ public:
 
 inline void * operator new(size_t s, small_object_allocator & r) { return r.allocate(s); }
 inline void * operator new[](size_t s, small_object_allocator & r) { return r.allocate(s); }
-inline void operator delete(void * p, size_t s, small_object_allocator & r) { r.deallocate(s,p); }
-inline void operator delete[](void * p, size_t s, small_object_allocator & r) { r.deallocate(s,p); }
+inline void operator delete(void * p, small_object_allocator & r) { UNREACHABLE(); }
+inline void operator delete[](void * p, small_object_allocator & r) { UNREACHABLE(); }
 
 #endif /* _SMALL_OBJECT_ALLOCATOR_H_ */