diff --git a/src/sat/smt/polysat/polysat_core.h b/src/sat/smt/polysat/polysat_core.h
index 5262f2bbe..4e9c02118 100644
--- a/src/sat/smt/polysat/polysat_core.h
+++ b/src/sat/smt/polysat/polysat_core.h
@@ -48,13 +48,13 @@ namespace polysat {
             lbool      value;            // value assigned by solver
         };
         solver_interface& s;
+        mutable scoped_ptr_vector<dd::pdd_manager> m_pdd;
         viable m_viable;
         constraints m_constraints;
         assignment m_assignment;
         unsigned m_qhead = 0, m_vqhead = 0;
         svector<prop_item> m_prop_queue;
         svector<constraint_info> m_constraint_index;  // index of constraints
-        mutable scoped_ptr_vector<dd::pdd_manager> m_pdd;
         dependency_vector m_unsat_core;
 
 
diff --git a/src/sat/smt/polysat_solver.h b/src/sat/smt/polysat_solver.h
index f2c80a6e6..acb8f59a8 100644
--- a/src/sat/smt/polysat_solver.h
+++ b/src/sat/smt/polysat_solver.h
@@ -148,6 +148,7 @@ namespace polysat {
 	       
     public:
         solver(euf::solver& ctx, theory_id id);
+        ~solver() override {}
         void set_lookahead(sat::lookahead* s) override { }
         void init_search() override {}
         double get_reward(literal l, sat::ext_constraint_idx idx, sat::literal_occs_fun& occs) const override { return 0; }
diff --git a/src/solver/simplifier_solver.cpp b/src/solver/simplifier_solver.cpp
index 712c42f45..22c20ae93 100644
--- a/src/solver/simplifier_solver.cpp
+++ b/src/solver/simplifier_solver.cpp
@@ -289,8 +289,19 @@ public:
         return m_cached_mc;
     }
 
-    unsigned get_num_assertions() const override { return s->get_num_assertions(); }
-    expr* get_assertion(unsigned idx) const override { return s->get_assertion(idx); }
+    unsigned get_num_assertions() const override { 
+        unsigned qhead = m_preprocess_state.qhead();
+        unsigned qtail = m_preprocess_state.qtail();
+        return s->get_num_assertions() + qtail - qhead;
+    }
+    expr* get_assertion(unsigned idx) const override { 
+        unsigned qhead = m_preprocess_state.qhead();
+        unsigned qtail = m_preprocess_state.qtail();
+        if (idx < qtail - qhead)
+            return m_fmls.get(idx + qhead).fml();
+        idx -= qtail - qhead;
+        return s->get_assertion(idx); 
+    }
     std::string reason_unknown() const override { return s->reason_unknown(); }
     void set_reason_unknown(char const* msg) override { s->set_reason_unknown(msg); }
     void get_labels(svector<symbol>& r) override { s->get_labels(r); }
@@ -364,9 +375,6 @@ public:
 
     expr* congruence_root(expr* e) override { return s->congruence_root(e); }
     expr* congruence_next(expr* e) override { return s->congruence_next(e); }
-    std::ostream& display(std::ostream& out, unsigned n, expr* const* assumptions) const override {
-        return s->display(out, n, assumptions);
-    }
     void get_units_core(expr_ref_vector& units) override { s->get_units_core(units); }
     expr_ref_vector get_trail(unsigned max_level) override { return s->get_trail(max_level); }
     void get_levels(ptr_vector<expr> const& vars, unsigned_vector& depth) override { s->get_levels(vars, depth); }