diff --git a/src/ast/simplifiers/extract_eqs.cpp b/src/ast/simplifiers/extract_eqs.cpp
index 99be4268c..1e9b576e1 100644
--- a/src/ast/simplifiers/extract_eqs.cpp
+++ b/src/ast/simplifiers/extract_eqs.cpp
@@ -21,12 +21,14 @@ Author:
 #include "ast/ast_pp.h"
 #include "ast/arith_decl_plugin.h"
 #include "ast/simplifiers/extract_eqs.h"
+#include "params/tactic_params.hpp"
 
 
 namespace euf {
 
     class basic_extract_eq : public extract_eq {
         ast_manager& m;
+        bool m_ite_solver = true;
 
     public:
         basic_extract_eq(ast_manager& m) : m(m) {}
@@ -41,7 +43,7 @@ namespace euf {
                     eqs.push_back(dependent_eq(to_app(y), expr_ref(x, m), d));
             }
             expr* c, * th, * el, * x1, * y1, * x2, * y2;
-            if (m.is_ite(f, c, th, el)) {
+            if (m_ite_solver && m.is_ite(f, c, th, el)) {
                 if (m.is_eq(th, x1, y1) && m.is_eq(el, x2, y2)) {
                     if (x1 == y2 && is_uninterp_const(x1))
                         std::swap(x2, y2);
@@ -58,6 +60,11 @@ namespace euf {
             if (m.is_not(f, x) && is_uninterp_const(x))
                 eqs.push_back(dependent_eq(to_app(x), expr_ref(m.mk_false(), m), d));
         }
+
+        void updt_params(params_ref const& p) {
+            tactic_params tp(p);
+            m_ite_solver = p.get_bool("ite_solver", tp.solve_eqs_ite_solver());
+        }
     };
 
     class arith_extract_eq : public extract_eq {
@@ -65,6 +72,7 @@ namespace euf {
         arith_util         a;
         expr_ref_vector    m_args;
         expr_sparse_mark   m_nonzero;
+        bool               m_enabled = true;
 
 
         // solve u mod r1 = y -> u = r1*mod!1 + y
@@ -215,6 +223,8 @@ namespace euf {
     public:
         arith_extract_eq(ast_manager& m) : m(m), a(m), m_args(m) {}
         void get_eqs(dependent_expr const& e, dep_eq_vector& eqs) override {
+            if (!m_enabled)
+                return;
             auto [f, d] = e();
             expr* x, * y;
             if (m.is_eq(f, x, y) && a.is_int_real(x)) {
@@ -224,12 +234,20 @@ namespace euf {
         }
 
         void pre_process(dependent_expr_state& fmls) override {
+            if (!m_enabled)
+                return;
             m_nonzero.reset();
             for (unsigned i = 0; i < fmls.size(); ++i) {
                 auto [f, d] = fmls[i]();
                 add_pos(f);
             }
         }
+
+
+        void updt_params(params_ref const& p) {
+            tactic_params tp(p);
+            m_enabled = p.get_bool("theory_solver", tp.solve_eqs_ite_solver());
+        }
     };
 
     void register_extract_eqs(ast_manager& m, scoped_ptr_vector<extract_eq>& ex) {
diff --git a/src/ast/simplifiers/extract_eqs.h b/src/ast/simplifiers/extract_eqs.h
index 29c136028..00f96f59b 100644
--- a/src/ast/simplifiers/extract_eqs.h
+++ b/src/ast/simplifiers/extract_eqs.h
@@ -40,6 +40,7 @@ namespace euf {
         virtual ~extract_eq() {}
         virtual void get_eqs(dependent_expr const& e, dep_eq_vector& eqs) = 0;
         virtual void pre_process(dependent_expr_state& fmls) {}
+        virtual void updt_params(params_ref const& p) {}
     };
 
     void register_extract_eqs(ast_manager& m, scoped_ptr_vector<extract_eq>& ex);
diff --git a/src/ast/simplifiers/solve_eqs.cpp b/src/ast/simplifiers/solve_eqs.cpp
index cc3ad5b7b..6b2a27d2d 100644
--- a/src/ast/simplifiers/solve_eqs.cpp
+++ b/src/ast/simplifiers/solve_eqs.cpp
@@ -24,6 +24,7 @@ Author:
 #include "ast/rewriter/expr_replacer.h"
 #include "ast/simplifiers/solve_eqs.h"
 #include "ast/converters/generic_model_converter.h"
+#include "params/tactic_params.hpp"
 
 
 namespace euf {
@@ -46,7 +47,8 @@ namespace euf {
         m_next.resize(m_id2var.size());
 
         for (auto const& eq : eqs)
-            m_next[var2id(eq.var)].push_back(eq);
+            if (can_be_var(eq.var))
+                m_next[var2id(eq.var)].push_back(eq);
     }
 
     /**
@@ -136,10 +138,7 @@ namespace euf {
             tout << "after normalizing variables\n";
         for (unsigned id : m_subst_ids) {
             auto const& eq = m_next[id][0];
-            expr* def = nullptr;
-            proof* pr = nullptr;
-            expr_dependency* dep = nullptr;
-            m_subst->find(eq.var, def, pr, dep);
+            expr* def = m_subst->find(eq.var);
             tout << mk_pp(eq.var, m) << "\n----->\n" << mk_pp(def, m) << "\n\n";
         });
     }
@@ -201,14 +200,11 @@ namespace euf {
     }
 
     void solve_eqs::updt_params(params_ref const& p) {
-        // TODO
-#if 0
-        tactic_params tp(m_params);
-        m_ite_solver = p.get_bool("ite_solver", tp.solve_eqs_ite_solver());
-        m_theory_solver = p.get_bool("theory_solver", tp.solve_eqs_theory_solver());
-        m_max_occs = p.get_uint("solve_eqs_max_occs", tp.solve_eqs_max_occs());
-        m_context_solve = p.get_bool("context_solve", tp.solve_eqs_context_solve());
-#endif
+        tactic_params tp(p);
+        m_config.m_max_occs = p.get_uint("solve_eqs_max_occs", tp.solve_eqs_max_occs());
+        m_config.m_context_solve = p.get_bool("context_solve", tp.solve_eqs_context_solve());
+        for (auto* ex : m_extract_plugins)
+            ex->updt_params(p);
     }
 
     void solve_eqs::collect_statistics(statistics& st) const {
diff --git a/src/ast/simplifiers/solve_eqs.h b/src/ast/simplifiers/solve_eqs.h
index 02d20a50e..49cd90ca2 100644
--- a/src/ast/simplifiers/solve_eqs.h
+++ b/src/ast/simplifiers/solve_eqs.h
@@ -30,6 +30,10 @@ namespace euf {
             unsigned m_num_steps = 0;
             unsigned m_num_elim_vars = 0;
         };
+        struct config {
+            bool m_context_solve = true;
+            unsigned m_max_occs = UINT_MAX;
+        };
 
         th_rewriter                   m_rewriter;
         scoped_ptr_vector<extract_eq> m_extract_plugins;
@@ -40,6 +44,7 @@ namespace euf {
 
         expr_mark                     m_unsafe_vars;   // expressions that cannot be replaced
         stats                         m_stats;
+        config                        m_config;
 
         void add_subst(dependent_eq const& eq);
 
diff --git a/src/params/CMakeLists.txt b/src/params/CMakeLists.txt
index f420ddd6d..cdc21da97 100644
--- a/src/params/CMakeLists.txt
+++ b/src/params/CMakeLists.txt
@@ -16,6 +16,7 @@ z3_add_component(params
     rewriter_params.pyg
     seq_rewriter_params.pyg
     solver_params.pyg
+    tactic_params.pyg
   EXTRA_REGISTER_MODULE_HEADERS
     context_params.h
 )
diff --git a/src/tactic/tactic_params.pyg b/src/params/tactic_params.pyg
similarity index 100%
rename from src/tactic/tactic_params.pyg
rename to src/params/tactic_params.pyg
diff --git a/src/tactic/CMakeLists.txt b/src/tactic/CMakeLists.txt
index f0910fcc2..ab81ebfe2 100644
--- a/src/tactic/CMakeLists.txt
+++ b/src/tactic/CMakeLists.txt
@@ -19,6 +19,4 @@ z3_add_component(tactic
   TACTIC_HEADERS
     probe.h
     tactic.h
-  PYG_FILES
-    tactic_params.pyg
 )
diff --git a/src/tactic/core/blast_term_ite_tactic.cpp b/src/tactic/core/blast_term_ite_tactic.cpp
index 38b4e172e..49e43e633 100644
--- a/src/tactic/core/blast_term_ite_tactic.cpp
+++ b/src/tactic/core/blast_term_ite_tactic.cpp
@@ -20,7 +20,7 @@ Notes:
 #include "ast/rewriter/rewriter_def.h"
 #include "ast/scoped_proof.h"
 #include "tactic/tactical.h"
-#include "tactic/tactic_params.hpp"
+#include "params/tactic_params.hpp"
 
 
 
diff --git a/src/tactic/core/propagate_values_tactic.cpp b/src/tactic/core/propagate_values_tactic.cpp
index 5b7fcbf10..041e4d1c2 100644
--- a/src/tactic/core/propagate_values_tactic.cpp
+++ b/src/tactic/core/propagate_values_tactic.cpp
@@ -24,7 +24,7 @@ Revision History:
 #include "ast/ast_pp.h"
 #include "ast/expr_substitution.h"
 #include "tactic/goal_shared_occs.h"
-#include "tactic/tactic_params.hpp"
+#include "params/tactic_params.hpp"
 
 namespace {
 class propagate_values_tactic : public tactic {
diff --git a/src/tactic/core/solve_eqs_tactic.cpp b/src/tactic/core/solve_eqs_tactic.cpp
index 977a0d614..3e338b57e 100644
--- a/src/tactic/core/solve_eqs_tactic.cpp
+++ b/src/tactic/core/solve_eqs_tactic.cpp
@@ -28,7 +28,7 @@ Revision History:
 #include "tactic/goal_shared_occs.h"
 #include "tactic/tactical.h"
 #include "ast/converters/generic_model_converter.h"
-#include "tactic/tactic_params.hpp"
+#include "params/tactic_params.hpp"
 
 class solve_eqs_tactic : public tactic {
     struct imp {
diff --git a/src/tactic/dependent_expr_state_tactic.h b/src/tactic/dependent_expr_state_tactic.h
index 116baedf7..ae3635c77 100644
--- a/src/tactic/dependent_expr_state_tactic.h
+++ b/src/tactic/dependent_expr_state_tactic.h
@@ -83,7 +83,7 @@ public:
         m_simp->reduce();
         m_goal->inc_depth();
         if (in->models_enabled())
-            in->set(m_simp->get_model_converter());
+            in->set(m_simp->get_model_converter().get());
         result.push_back(in.get());        
     }
 
diff --git a/src/tactic/portfolio/smt_strategic_solver.cpp b/src/tactic/portfolio/smt_strategic_solver.cpp
index 483be4cca..b521095be 100644
--- a/src/tactic/portfolio/smt_strategic_solver.cpp
+++ b/src/tactic/portfolio/smt_strategic_solver.cpp
@@ -44,7 +44,7 @@ Notes:
 #include "solver/solver2tactic.h"
 #include "solver/parallel_tactic.h"
 #include "solver/parallel_params.hpp"
-#include "tactic/tactic_params.hpp"
+#include "params/tactic_params.hpp"
 #include "parsers/smt2/smt2parser.h"