diff --git a/src/sat/smt/CMakeLists.txt b/src/sat/smt/CMakeLists.txt
index 01681a6b1..dc7f73c93 100644
--- a/src/sat/smt/CMakeLists.txt
+++ b/src/sat/smt/CMakeLists.txt
@@ -40,7 +40,7 @@ z3_add_component(sat_smt
     recfun_solver.cpp
     sat_dual_solver.cpp
     sat_th.cpp
-    smt_relevancy.cpp
+    smt_relevant.cpp
     user_solver.cpp
   COMPONENT_DEPENDENCIES
     sat
diff --git a/src/sat/smt/euf_relevancy.cpp b/src/sat/smt/euf_relevancy.cpp
index e722e6412..64aea0c8c 100644
--- a/src/sat/smt/euf_relevancy.cpp
+++ b/src/sat/smt/euf_relevancy.cpp
@@ -22,16 +22,25 @@ Author:
 
 namespace euf {
 
-    void solver::add_auto_relevant(expr* e) {
+    void solver::add_auto_relevant(sat::literal lit) {
+#if NEW_RELEVANCY
+        m_relevancy.mark_relevant(lit);
+        return;
+#endif
         if (!relevancy_enabled())
             return;
         for (; m_auto_relevant_scopes > 0; --m_auto_relevant_scopes) 
             m_auto_relevant_lim.push_back(m_auto_relevant.size());
         // std::cout << "add-auto " << e->get_id() << " " << mk_bounded_pp(e, m) << "\n";
+        expr* e = bool_var2expr(lit.var());
         m_auto_relevant.push_back(e);
     }
     
     void solver::pop_relevant(unsigned n) {
+#if NEW_RELEVANCY
+        m_relevancy.pop(n);
+        return;
+#endif
         if (m_auto_relevant_scopes >= n) {
             m_auto_relevant_scopes -= n;
             return;
@@ -45,18 +54,31 @@ namespace euf {
     }
     
     void solver::push_relevant() {
+#if NEW_RELEVANCY
+        m_relevancy.push();
+        return;
+#endif
         ++m_auto_relevant_scopes;
     }
 
     bool solver::is_relevant(expr* e) const { 
+#if NEW_RELEVANCY
+        return m_relevancy.is_relevant(e);
+#endif
         return m_relevant_expr_ids.get(e->get_id(), true); 
     }
 
     bool solver::is_relevant(enode* n) const { 
+#if NEW_RELEVANCY
+        return m_relevancy.is_relevant(n);
+#endif
         return m_relevant_expr_ids.get(n->get_expr_id(), true); 
     }
 
     void solver::ensure_dual_solver() {
+#if NEW_RELEVANCY
+        return;
+#endif
         if (m_dual_solver)
             return;
         m_dual_solver = alloc(sat::dual_solver, s(), s().rlimit());
@@ -71,6 +93,10 @@ namespace euf {
      * not tracked.
      */
     void solver::add_root(unsigned n, sat::literal const* lits) {
+#if NEW_RELEVANCY
+        m_relevancy.add_root(n, lits);
+        return;
+#endif
         if (!relevancy_enabled())
             return;
         ensure_dual_solver();
@@ -78,6 +104,10 @@ namespace euf {
     }
 
     void solver::add_aux(unsigned n, sat::literal const* lits) {
+#if NEW_RELEVANCY
+        m_relevancy.add_def(n, lits);
+        return;
+#endif
         if (!relevancy_enabled())
             return;
         ensure_dual_solver();
@@ -85,11 +115,17 @@ namespace euf {
     }
 
     void solver::track_relevancy(sat::bool_var v) {
+#if NEW_RELEVANCY
+        return;
+#endif
         ensure_dual_solver();
         m_dual_solver->track_relevancy(v);
     }
 
     bool solver::init_relevancy() {
+#if NEW_RELEVANCY
+        return true;
+#endif
         m_relevant_expr_ids.reset();
         if (!relevancy_enabled())
             return true;
@@ -108,16 +144,19 @@ namespace euf {
     }
 
     void solver::push_relevant(sat::bool_var v) {
+        SASSERT(!NEW_RELEVANCY);
         expr* e = m_bool_var2expr.get(v, nullptr);
         if (e)
             m_relevant_todo.push_back(e);
     }
 
     bool solver::is_propagated(sat::literal lit) {
+        SASSERT(!NEW_RELEVANCY);
         return s().value(lit) == l_true && !s().get_justification(lit.var()).is_none();
     }
 
     void solver::init_relevant_expr_ids() {
+        SASSERT(!NEW_RELEVANCY);
         unsigned max_id = 0;
         for (enode* n : m_egraph.nodes())
             max_id = std::max(max_id, n->get_expr_id());
@@ -127,6 +166,7 @@ namespace euf {
     }
 
     void solver::relevant_subterms() {
+        SASSERT(!NEW_RELEVANCY);
         ptr_vector<expr>& todo = m_relevant_todo;
         bool_vector& visited = m_relevant_visited;
         for (unsigned i = 0; i < todo.size(); ++i) {
diff --git a/src/sat/smt/euf_solver.cpp b/src/sat/smt/euf_solver.cpp
index bbdd6ce0e..2c602d205 100644
--- a/src/sat/smt/euf_solver.cpp
+++ b/src/sat/smt/euf_solver.cpp
@@ -41,6 +41,7 @@ namespace euf {
         extension(symbol("euf"), m.mk_family_id("euf")),
         m(m),
         si(si),
+        m_relevancy(*this),
         m_egraph(m),
         m_trail(),
         m_rewriter(m),
@@ -183,7 +184,7 @@ namespace euf {
     }
 
     void solver::propagate(literal lit, ext_justification_idx idx) {
-        add_auto_relevant(bool_var2expr(lit.var()));
+        add_auto_relevant(lit);
         s().assign(lit, sat::justification::mk_ext_justification(s().scope_lvl(), idx));
     }
 
@@ -243,10 +244,17 @@ namespace euf {
     bool solver::propagate(enode* a, enode* b, ext_justification_idx idx) {
         if (a->get_root() == b->get_root())
             return false;
-        m_egraph.merge(a, b, to_ptr(idx));
+        merge(a, b, to_ptr(idx));
         return true;
     }
 
+    void solver::merge(enode* a, enode* b, void* r) {
+#if NEW_RELEVANCY
+        m_relevancy.merge(a, b);
+#endif
+        m_egraph.merge(a, b, r);
+    }
+
     void solver::get_antecedents(literal l, constraint& j, literal_vector& r, bool probing) {
         expr* e = nullptr;
         euf::enode* n = nullptr;
@@ -286,6 +294,12 @@ namespace euf {
     }
 
     void solver::asserted(literal l) {
+#if NEW_RELEVANCY
+        if (!m_relevancy.is_relevant(l)) {
+            m_relevancy.asserted(l);
+            return;
+        }
+#endif
         expr* e = m_bool_var2expr.get(l.var(), nullptr);
         TRACE("euf", tout << "asserted: " << l << "@" << s().scope_lvl() << " := " << mk_bounded_pp(e, m) << "\n";);
         if (!e) 
@@ -306,14 +320,14 @@ namespace euf {
             euf::enode* r = n->get_root();
             euf::enode* rb = sign ? mk_true() : mk_false();
             sat::literal rl(r->bool_var(), r->value() == l_false);
-            m_egraph.merge(n, nb, c);
-            m_egraph.merge(r, rb, to_ptr(rl));
+            merge(n, nb, c);
+            merge(r, rb, to_ptr(rl));
             SASSERT(m_egraph.inconsistent());
             return;
 	    }
         if (n->merge_tf()) {
             euf::enode* nb = sign ? mk_false() : mk_true();
-            m_egraph.merge(n, nb, c);
+            merge(n, nb, c);
         }
         if (n->is_equality()) {
             SASSERT(!m.is_iff(e));
@@ -321,7 +335,7 @@ namespace euf {
             if (sign)
                 m_egraph.new_diseq(n);
             else                 
-                m_egraph.merge(n->get_arg(0), n->get_arg(1), c);            
+                merge(n->get_arg(0), n->get_arg(1), c);            
         }    
     }
 
@@ -329,6 +343,9 @@ namespace euf {
     bool solver::unit_propagate() {
         bool propagated = false;
         while (!s().inconsistent()) {
+#if NEW_RELEVANCY
+            m_relevancy.propagate();
+#endif
             if (m_egraph.inconsistent()) {  
                 unsigned lvl = s().scope_lvl();
                 s().set_conflict(sat::justification::mk_ext_justification(lvl, conflict_constraint().to_index()));
diff --git a/src/sat/smt/euf_solver.h b/src/sat/smt/euf_solver.h
index 114cfbd8c..1396e00fb 100644
--- a/src/sat/smt/euf_solver.h
+++ b/src/sat/smt/euf_solver.h
@@ -28,8 +28,11 @@ Author:
 #include "sat/smt/sat_dual_solver.h"
 #include "sat/smt/euf_ackerman.h"
 #include "sat/smt/user_solver.h"
+#include "sat/smt/smt_relevant.h"
 #include "smt/params/smt_params.h"
 
+#define NEW_RELEVANCY 0
+
 namespace euf {
     typedef sat::literal literal;
     typedef sat::ext_constraint_idx ext_constraint_idx;
@@ -91,6 +94,7 @@ namespace euf {
         std::function<::solver*(void)>   m_mk_solver;
         ast_manager&                     m;
         sat::sat_internalizer& si;
+        smt::relevancy         m_relevancy;
         smt_params             m_config;
         euf::egraph            m_egraph;
         trail_stack            m_trail;
@@ -289,6 +293,7 @@ namespace euf {
 
         void propagate(literal lit, ext_justification_idx idx);
         bool propagate(enode* a, enode* b, ext_justification_idx idx);
+        void merge(enode* a, enode* b, void* r);
         void set_conflict(ext_justification_idx idx);
 
         void propagate(literal lit, th_explain* p) { propagate(lit, p->to_index()); }
@@ -367,14 +372,14 @@ namespace euf {
         bool is_shared(euf::enode* n) const;
 
         // relevancy
-        bool m_relevancy = true;
+        bool m_relevancy_enabled = true;
         scoped_ptr<sat::dual_solver>  m_dual_solver;
         ptr_vector<expr>              m_auto_relevant;
         unsigned_vector               m_auto_relevant_lim;
         unsigned                      m_auto_relevant_scopes = 0;
 
-        bool relevancy_enabled() const { return m_relevancy && get_config().m_relevancy_lvl > 0; }
-        void disable_relevancy(expr* e) { IF_VERBOSE(0, verbose_stream() << "disabling relevancy " << mk_pp(e, m) << "\n"); m_relevancy = false;  }
+        bool relevancy_enabled() const { return m_relevancy_enabled && get_config().m_relevancy_lvl > 0; }
+        void disable_relevancy(expr* e) { IF_VERBOSE(0, verbose_stream() << "disabling relevancy " << mk_pp(e, m) << "\n"); m_relevancy_enabled = false;  }
         void add_root(unsigned n, sat::literal const* lits);
         void add_root(sat::literal_vector const& lits) { add_root(lits.size(), lits.data()); }
         void add_root(sat::literal lit) { add_root(1, &lit); }
@@ -387,7 +392,7 @@ namespace euf {
         void track_relevancy(sat::bool_var v);
         bool is_relevant(expr* e) const;
         bool is_relevant(enode* n) const;
-        void add_auto_relevant(expr* e);
+        void add_auto_relevant(sat::literal lit);
         void pop_relevant(unsigned n);
         void push_relevant();
 
diff --git a/src/sat/smt/smt_relevancy.cpp b/src/sat/smt/smt_relevant.cpp
similarity index 88%
rename from src/sat/smt/smt_relevancy.cpp
rename to src/sat/smt/smt_relevant.cpp
index 21d570dd2..d70d37beb 100644
--- a/src/sat/smt/smt_relevancy.cpp
+++ b/src/sat/smt/smt_relevant.cpp
@@ -13,12 +13,10 @@ Author:
 
     Nikolaj Bjorner (nbjorner) 2021-12-27
 
-
-
 --*/
 #include "sat/sat_solver.h"
 #include "sat/smt/euf_solver.h"
-#include "sat/smt/smt_relevancy.h"
+#include "sat/smt/smt_relevant.h"
 
 
 namespace smt {
@@ -28,11 +26,13 @@ namespace smt {
     }
 
     void relevancy::relevant_eh(euf::enode* n) {
-        // callback into ctx.
+        // nothing
     }
 
     void relevancy::relevant_eh(sat::literal lit) {
-        // callback into ctx.
+        SASSERT(ctx.s().value(lit) == l_true);
+        SASSERT(is_relevant(lit));
+        ctx.asserted(lit);
     }
     
     void relevancy::pop(unsigned n) {
@@ -97,12 +97,12 @@ namespace smt {
             return;
         }
 
-        sat::clause cl = *m_alloc.mk_clause(n, lits, false);
+        sat::clause* cl = m_alloc.mk_clause(n, lits, false);
         unsigned sz = m_clauses.size();
-        m_clauses.push_back(&cl);
+        m_clauses.push_back(cl);
         m_roots.push_back(true);
         m_trail.push_back(std::make_pair(update::add_clause, 0));
-        for (sat::literal lit : cl) 
+        for (sat::literal lit : *cl) 
             occurs(lit).push_back(sz);
     }
     
@@ -116,16 +116,16 @@ namespace smt {
                 return;
             }
         }
-        sat::clause cl = *m_alloc.mk_clause(n, lits, false);
+        sat::clause* cl = m_alloc.mk_clause(n, lits, false);
         unsigned sz = m_clauses.size();
-        m_clauses.push_back(&cl);
+        m_clauses.push_back(cl);
         m_roots.push_back(false);
         m_trail.push_back(std::make_pair(update::add_clause, 0));
-        for (sat::literal lit : cl) 
+        for (sat::literal lit : *cl) 
             occurs(lit).push_back(sz);        
     }
 
-    void relevancy::assign(sat::literal lit) {
+    void relevancy::asserted(sat::literal lit) {
         if (!m_enabled)
             return;
         flush();
@@ -163,6 +163,13 @@ namespace smt {
                 propagate_relevant(lit);            
         }
     }
+
+    void relevancy::merge(euf::enode* n1, euf::enode* n2) {
+        if (is_relevant(n1))
+            mark_relevant(n2);
+        else if (is_relevant(n2))
+            mark_relevant(n1);
+    }
     
     void relevancy::mark_relevant(euf::enode* n) {
         if (!m_enabled)
@@ -187,10 +194,13 @@ namespace smt {
             return;
         flush();
         if (is_relevant(lit))
-            return;
+            return;        
         m_relevant_var_ids.setx(lit.var(), true, false);
         m_trail.push_back(std::make_pair(update::relevant_var, lit.var()));
         m_queue.push_back(std::make_pair(lit, nullptr));
+        euf::enode* n = nullptr;
+        if (n)
+            mark_relevant(n);
     }
 
     void relevancy::propagate_relevant(sat::literal lit) {
@@ -221,6 +231,7 @@ namespace smt {
 
     void relevancy::propagate_relevant(euf::enode* n) {
         relevant_eh(n);
+        // if is_bool_op n, return;
         for (euf::enode* arg : euf::enode_args(n))
             mark_relevant(arg);
     }
diff --git a/src/sat/smt/smt_relevancy.h b/src/sat/smt/smt_relevant.h
similarity index 97%
rename from src/sat/smt/smt_relevancy.h
rename to src/sat/smt/smt_relevant.h
index 5532cd5a3..6faa66b0f 100644
--- a/src/sat/smt/smt_relevancy.h
+++ b/src/sat/smt/smt_relevant.h
@@ -129,11 +129,12 @@ namespace smt {
 
         void add_root(unsigned n, sat::literal const* lits);
         void add_def(unsigned n, sat::literal const* lits);
-        void assign(sat::literal lit);
+        void asserted(sat::literal lit);
         void propagate();
 
         void mark_relevant(euf::enode* n);
         void mark_relevant(sat::literal lit);
+        void merge(euf::enode* n1, euf::enode* n2);
 
         bool is_relevant(sat::literal lit) const { return !m_enabled || m_relevant_var_ids.get(lit.var(), false); }
         bool is_relevant(euf::enode* n) const { return !m_enabled || m_relevant_expr_ids.get(n->get_expr_id(), false); }