diff --git a/src/sat/sat_asymm_branch.cpp b/src/sat/sat_asymm_branch.cpp
index dbb5ea123..3a3184141 100644
--- a/src/sat/sat_asymm_branch.cpp
+++ b/src/sat/sat_asymm_branch.cpp
@@ -134,7 +134,6 @@ namespace sat {
                 s.propagate(false); 
                 if (s.m_inconsistent)
                     break;
-                std::cout << m_elim_literals - elim << "\n";
                 if (m_elim_literals == elim)
                     break;
             }
@@ -232,19 +231,6 @@ namespace sat {
             }
         }
         if (!m_to_delete.empty()) {
-#if 0
-            std::cout << "delete " << m_to_delete << "\n";
-
-            std::cout << "pos\n";
-            for (literal l : m_pos) {
-                std::cout << l << ": " << scc.get_left(l) << " " << scc.get_right(l) << "\n";
-            }
-            std::cout << "neg\n";
-            for (literal l : m_neg) {
-                std::cout << l << ": " << scc.get_left(l) << " " << scc.get_right(l) << "\n";
-            }
-            std::cout << "\n";
-#endif
             unsigned j = 0;
             for (unsigned i = 0; i < c.size(); ++i) {
                 if (!m_to_delete.contains(c[i])) {
diff --git a/src/sat/sat_simplifier.cpp b/src/sat/sat_simplifier.cpp
index 558bfb11e..674ee9121 100644
--- a/src/sat/sat_simplifier.cpp
+++ b/src/sat/sat_simplifier.cpp
@@ -1782,7 +1782,7 @@ namespace sat {
 
         // eliminate variable
         ++s.m_stats.m_elim_var_res;
-        VERIFY(!s.is_external(v));
+        VERIFY(!is_external(v));
         model_converter::entry & mc_entry = s.m_mc.mk(model_converter::ELIM_VAR, v);
         save_clauses(mc_entry, m_pos_cls);
         save_clauses(mc_entry, m_neg_cls);
diff --git a/src/sat/sat_solver/inc_sat_solver.cpp b/src/sat/sat_solver/inc_sat_solver.cpp
index 9e185e6fa..2af846f42 100644
--- a/src/sat/sat_solver/inc_sat_solver.cpp
+++ b/src/sat/sat_solver/inc_sat_solver.cpp
@@ -36,6 +36,7 @@ Notes:
 #include "ast/ast_util.h"
 #include "tactic/core/propagate_values_tactic.h"
 #include "sat/sat_params.hpp"
+#include "sat/sat_simplifier_params.hpp"
 
 // incremental SAT solver.
 class inc_sat_solver : public solver {
@@ -88,7 +89,17 @@ public:
         m_internalized_fmls(m) {
         updt_params(p);
         init_preprocess();
-        m_solver.set_incremental(incremental_mode);
+        m_solver.set_incremental(incremental_mode && !override_incremental());
+    }
+
+    bool override_incremental() const {
+        sat_simplifier_params p(m_params);
+        std::cout << "override: " << p.override_incremental() << "\n";
+        return p.override_incremental();
+    }
+
+    bool is_incremental() const {
+        return m_solver.get_config().m_incremental;
     }
 
     virtual ~inc_sat_solver() {}
@@ -99,7 +110,7 @@ public:
         }
         ast_translation tr(m, dst_m);
         m_solver.pop_to_base_level();
-        inc_sat_solver* result = alloc(inc_sat_solver, dst_m, p, m_solver.get_config().m_incremental);
+        inc_sat_solver* result = alloc(inc_sat_solver, dst_m, p, is_incremental());
         result->m_solver.copy(m_solver);
         result->m_fmls_head = m_fmls_head;
         for (expr* f : m_fmls) result->m_fmls.push_back(tr(f));
@@ -272,6 +283,7 @@ public:
         m_params.set_bool("pb_totalizer", m_solver.get_config().m_pb_solver == sat::PB_TOTALIZER);
         m_params.set_bool("xor_solver", p1.xor_solver());
         m_solver.updt_params(m_params);
+        m_solver.set_incremental(is_incremental() && !override_incremental());
 
     }
     virtual void collect_statistics(statistics & st) const {
@@ -517,7 +529,7 @@ private:
         m_pc = g->pc();
         m_mc = g->mc();
         TRACE("sat", g->display_with_dependencies(tout););
-        m_goal2sat(*g, m_params, m_solver, m_map, dep2asm, m_solver.get_config().m_incremental, is_lemma);
+        m_goal2sat(*g, m_params, m_solver, m_map, dep2asm, is_incremental(), is_lemma);
         m_goal2sat.get_interpreted_atoms(atoms);
         if (!atoms.empty()) {
             std::stringstream strm;