diff --git a/enc_temp_folder/fe6ce1b742e2a086b6bab9a9a6a6456b/smt_tactic_core.cpp b/enc_temp_folder/fe6ce1b742e2a086b6bab9a9a6a6456b/smt_tactic_core.cpp
new file mode 100644
index 000000000..8aae7a197
--- /dev/null
+++ b/enc_temp_folder/fe6ce1b742e2a086b6bab9a9a6a6456b/smt_tactic_core.cpp
@@ -0,0 +1,474 @@
+/*++
+Copyright (c) 2011 Microsoft Corporation
+
+Module Name:
+
+    smt_tactic.h
+
+Abstract:
+
+    smt::context as a tactic.
+
+Author:
+
+    Leonardo (leonardo) 2011-10-18
+
+Notes:
+
+--*/
+#include "util/debug.h"
+#include "ast/rewriter/rewriter_types.h"
+#include "ast/ast_util.h"
+#include "ast/ast_ll_pp.h"
+#include "smt/smt_kernel.h"
+#include "smt/params/smt_params.h"
+#include "smt/params/smt_params_helper.hpp"
+#include "smt/smt_solver.h"
+#include "tactic/tactic.h"
+#include "tactic/tactical.h"
+#include "tactic/generic_model_converter.h"
+#include "solver/solver2tactic.h"
+#include "solver/solver.h"
+#include "solver/mus.h"
+#include "solver/parallel_tactic.h"
+#include "solver/parallel_params.hpp"
+
+typedef obj_map<expr, expr *> expr2expr_map;
+
+
+class smt_tactic : public tactic {
+    ast_manager&                 m;
+    smt_params                   m_params;
+    params_ref                   m_params_ref;
+    statistics                   m_stats;
+    smt::kernel *                m_ctx;
+    symbol                       m_logic;
+    progress_callback *          m_callback;
+    bool                         m_candidate_models;
+    bool                         m_fail_if_inconclusive;
+
+public:
+    smt_tactic(ast_manager& m, params_ref const & p):
+        m(m),
+        m_params_ref(p),
+        m_ctx(nullptr),
+        m_callback(nullptr),
+        m_vars(m) {
+        updt_params_core(p);
+        TRACE("smt_tactic", tout << "p: " << p << "\n";);
+    }
+
+    tactic * translate(ast_manager & m) override {
+        return alloc(smt_tactic, m, m_params_ref);
+    }
+
+    ~smt_tactic() override {
+        SASSERT(m_ctx == nullptr);
+    }
+
+    smt_params & fparams() {
+        return m_params;
+    }
+
+    params_ref & params() {
+        return m_params_ref;
+    }
+
+    void updt_params_core(params_ref const & p) {
+        smt_params_helper _p(p);
+        m_candidate_models     = _p.candidate_models();
+        m_fail_if_inconclusive = p.get_bool("fail_if_inconclusive", true);
+    }
+
+    void updt_params(params_ref const & p) override {
+        TRACE("smt_tactic", tout << "updt_params: " << p << "\n";);
+        updt_params_core(p);
+        fparams().updt_params(p);
+        m_params_ref.copy(p);
+        m_logic = p.get_sym(symbol("logic"), m_logic);
+        if (m_logic != symbol::null && m_ctx) {
+            m_ctx->set_logic(m_logic);
+        }
+        SASSERT(p.get_bool("auto_config", fparams().m_auto_config) == fparams().m_auto_config);
+    }
+
+    void collect_param_descrs(param_descrs & r) override {
+        r.insert("fail_if_inconclusive", CPK_BOOL, "(default: true) fail if found unsat (sat) for under (over) approximated goal.");
+        smt_params_helper::collect_param_descrs(r);
+    }
+
+
+    void collect_statistics(statistics & st) const override {
+        if (m_ctx)
+            m_ctx->collect_statistics(st); // ctx is still running...
+        else
+            st.copy(m_stats);
+    }
+
+    void cleanup() override {
+    }
+
+    void reset_statistics() override {
+        m_stats.reset();
+    }
+
+    void set_logic(symbol const & l) override {
+        m_logic = l;
+    }
+
+    void set_progress_callback(progress_callback * callback) override {
+        m_callback = callback;
+    }
+
+    struct scoped_init_ctx {
+        smt_tactic & m_owner;
+        smt_params   m_params; // smt-setup overwrites parameters depending on the current assertions.
+        params_ref   m_params_ref;
+
+        scoped_init_ctx(smt_tactic & o, ast_manager & m):m_owner(o) {
+            m_params = o.fparams();
+            m_params_ref = o.params();
+            smt::kernel * new_ctx = alloc(smt::kernel, m, m_params, m_params_ref);
+            TRACE("smt_tactic", tout << "logic: " << o.m_logic << "\n";);
+            new_ctx->set_logic(o.m_logic);
+            if (o.m_callback) {
+                new_ctx->set_progress_callback(o.m_callback);
+            }
+            o.m_ctx = new_ctx;
+        }
+
+        ~scoped_init_ctx() {
+            smt::kernel * d = m_owner.m_ctx;
+            m_owner.m_ctx = nullptr;
+            m_owner.m_user_ctx = nullptr;
+
+            if (d)
+                dealloc(d);
+        }
+    };
+
+    void handle_canceled(goal_ref const & in,
+                         goal_ref_buffer & result) {
+    }
+
+    void operator()(goal_ref const & in,
+                    goal_ref_buffer & result) override {
+        try {
+            IF_VERBOSE(10, verbose_stream() << "(smt.tactic start)\n";);
+            tactic_report report("smt", *in);
+            TRACE("smt_tactic", tout << this << "\nAUTO_CONFIG: " << fparams().m_auto_config << " HIDIV0: " << fparams().m_hi_div0 << " "
+                  << " PREPROCESS: " << fparams().m_preprocess << "\n";
+                  tout << "RELEVANCY: " << fparams().m_relevancy_lvl << "\n";
+                  tout << "fail-if-inconclusive: " << m_fail_if_inconclusive << "\n";
+                  tout << "params_ref: " << m_params_ref << "\n";
+                  tout << "nnf: " << fparams().m_nnf_cnf << "\n";);
+            TRACE("smt_tactic_params", m_params.display(tout););
+            TRACE("smt_tactic_detail", in->display(tout););
+            TRACE("smt_tactic_memory", tout << "wasted_size: " << m.get_allocator().get_wasted_size() << "\n";);
+            scoped_init_ctx  init(*this, m);
+            SASSERT(m_ctx);
+
+            expr_ref_vector clauses(m);
+            expr2expr_map               bool2dep;
+            ptr_vector<expr>            assumptions;
+            ref<generic_model_converter> fmc;
+            if (in->unsat_core_enabled()) {
+                extract_clauses_and_dependencies(in, clauses, assumptions, bool2dep, fmc);
+                TRACE("mus", in->display_with_dependencies(tout);
+                      tout << clauses << "\n";);
+                if (in->proofs_enabled() && !assumptions.empty())
+                    throw tactic_exception("smt tactic does not support simultaneous generation of proofs and unsat cores");
+                for (unsigned i = 0; i < clauses.size(); ++i) {
+                    m_ctx->assert_expr(clauses[i].get());
+                }
+            }
+            else if (in->proofs_enabled()) {
+                unsigned sz = in->size();
+                for (unsigned i = 0; i < sz; i++) {
+                    m_ctx->assert_expr(in->form(i), in->pr(i));
+                }
+            }
+            else {
+                unsigned sz = in->size();
+                for (unsigned i = 0; i < sz; i++) {
+                    m_ctx->assert_expr(in->form(i));
+                }
+            }
+            if (m_ctx->canceled()) {                
+                throw tactic_exception(Z3_CANCELED_MSG);
+            }
+            user_propagate_delay_init();
+
+            lbool r;
+            try {
+                if (assumptions.empty() && !m_user_ctx)
+                    r = m_ctx->setup_and_check();
+                else
+                    r = m_ctx->check(assumptions.size(), assumptions.data());
+            }
+            catch(...) {
+                TRACE("smt_tactic", tout << "exception\n";);
+                m_ctx->collect_statistics(m_stats);
+                throw;
+            }
+            SASSERT(m_ctx);
+            m_ctx->collect_statistics(m_stats);
+            proof_ref pr(m_ctx->get_proof(), m);
+            TRACE("smt_tactic", tout << r << " " << pr << "\n";);
+            switch (r) {
+            case l_true: {
+                if (m_fail_if_inconclusive && !in->sat_preserved())
+                    throw tactic_exception("over-approximated goal found to be sat");
+                // the empty assertion set is trivially satifiable.
+                in->reset();
+                result.push_back(in.get());
+                // store the model in a no-op model converter, and filter fresh Booleans
+                if (in->models_enabled()) {
+                    model_ref md;
+                    m_ctx->get_model(md);
+                    buffer<symbol> r;
+                    m_ctx->get_relevant_labels(nullptr, r);
+                    labels_vec rv;
+                    rv.append(r.size(), r.data());
+                    model_converter_ref mc;
+                    mc = model_and_labels2model_converter(md.get(), rv);
+                    mc = concat(fmc.get(), mc.get());
+                    in->add(mc.get());
+                }
+                if (m_ctx->canceled()) 
+                    throw tactic_exception(Z3_CANCELED_MSG);                
+                return;
+            }
+            case l_false: {
+                if (m_fail_if_inconclusive && !in->unsat_preserved()) {
+                    TRACE("smt_tactic", tout << "failed to show to be unsat...\n";);
+                    throw tactic_exception("under-approximated goal found to be unsat");
+                }
+                // formula is unsat, reset the goal, and store false there.
+                in->reset();
+                expr_dependency * lcore = nullptr;
+                if (in->unsat_core_enabled()) {
+                    unsigned sz = m_ctx->get_unsat_core_size();
+                    for (unsigned i = 0; i < sz; i++) {
+                        expr * b = m_ctx->get_unsat_core_expr(i);
+                        SASSERT(is_uninterp_const(b) && m.is_bool(b));
+                        expr * d = bool2dep.find(b);
+                        lcore = m.mk_join(lcore, m.mk_leaf(d));
+                    }
+                }
+
+                if (m.proofs_enabled() && !pr) pr = m.mk_asserted(m.mk_false()); // bail out
+                if (pr && m.get_fact(pr) != m.mk_false()) pr = m.mk_asserted(m.mk_false()); // could happen in clause_proof mode
+                in->assert_expr(m.mk_false(), pr, lcore);
+                
+                result.push_back(in.get());
+                return;
+            }
+            case l_undef:
+
+                if (m_ctx->canceled() && !pr) {
+                    throw tactic_exception(Z3_CANCELED_MSG);
+                }
+
+                if (m_fail_if_inconclusive && !m_candidate_models && !pr) {
+                    std::stringstream strm;
+                    strm << "smt tactic failed to show goal to be sat/unsat " << m_ctx->last_failure_as_string();
+                    throw tactic_exception(strm.str());
+                }
+                result.push_back(in.get());
+                if (pr) {
+                    in->reset();
+                    in->assert_expr(m.get_fact(pr), pr, nullptr);
+                    in->updt_prec(goal::UNDER_OVER);
+                }
+                if (m_candidate_models) {
+                    switch (m_ctx->last_failure()) {
+                    case smt::NUM_CONFLICTS:
+                    case smt::THEORY:
+                    case smt::QUANTIFIERS:
+                        if (in->models_enabled()) {
+                            model_ref md;
+                            m_ctx->get_model(md);
+                            buffer<symbol> r;
+                            m_ctx->get_relevant_labels(nullptr, r);
+                            labels_vec rv;
+                            rv.append(r.size(), r.data());
+                            in->add(model_and_labels2model_converter(md.get(), rv));
+                        }
+                        return;
+                    default:
+                        break;
+                    }
+                }
+                if (pr) {
+                    return;
+                }
+                throw tactic_exception(m_ctx->last_failure_as_string());
+            }
+        }
+        catch (rewriter_exception & ex) {
+            throw tactic_exception(ex.msg());
+        }
+    }
+
+    void* m_user_ctx = nullptr;
+    user_propagator::push_eh_t  m_push_eh;
+    user_propagator::pop_eh_t   m_pop_eh;
+    user_propagator::fresh_eh_t m_fresh_eh;
+    user_propagator::fixed_eh_t m_fixed_eh;
+    user_propagator::final_eh_t m_final_eh;
+    user_propagator::eq_eh_t    m_eq_eh;
+    user_propagator::eq_eh_t    m_diseq_eh;
+    expr_ref_vector             m_vars;
+    unsigned_vector             m_var2internal;
+    unsigned_vector             m_internal2var;
+
+    user_propagator::fixed_eh_t i_fixed_eh;
+    user_propagator::final_eh_t i_final_eh;
+    user_propagator::eq_eh_t    i_eq_eh;
+    user_propagator::eq_eh_t    i_diseq_eh;
+
+
+
+    struct callback : public user_propagator::callback {
+        smt_tactic* t = nullptr;
+        user_propagator::callback* cb = nullptr;
+        unsigned_vector fixed, lhs, rhs;
+        void propagate_cb(unsigned num_fixed, unsigned const* fixed_ids, unsigned num_eqs, unsigned const* eq_lhs, unsigned const* eq_rhs, expr* conseq) override {
+            fixed.reset();
+            lhs.reset();
+            rhs.reset();
+            for (unsigned i = 0; i < num_fixed; ++i)
+                fixed.push_back(t->m_var2internal[i]);
+            for (unsigned i = 0; i < num_eqs; ++i) {
+                lhs.push_back(t->m_var2internal[eq_lhs[i]]);
+                rhs.push_back(t->m_var2internal[eq_rhs[i]]);
+            }
+            cb->propagate_cb(num_fixed, fixed.data(), num_eqs, lhs.data(), rhs.data(), conseq);
+        }
+    };
+
+    callback i_cb;
+
+    void init_i_fixed_eh() {
+        if (!m_fixed_eh)
+            return;
+        i_fixed_eh = [this](void* ctx, user_propagator::callback* cb, unsigned id, expr* value) {
+            i_cb.t = this;
+            i_cb.cb = cb;
+            m_fixed_eh(ctx, &i_cb, m_internal2var[id], value);
+        };
+        m_ctx->user_propagate_register_fixed(i_fixed_eh);
+    }
+
+    void init_i_final_eh() {
+        if (!m_final_eh)
+            return;
+        i_final_eh = [this](void* ctx, user_propagator::callback* cb) {
+            i_cb.t = this;
+            i_cb.cb = cb;
+            m_final_eh(ctx, &i_cb);
+        };
+        m_ctx->user_propagate_register_final(i_final_eh);
+    }
+
+    void init_i_eq_eh() {
+        if (!m_eq_eh)
+            return;
+        i_eq_eh = [this](void* ctx, user_propagator::callback* cb, unsigned u, unsigned v) {
+            i_cb.t = this;
+            i_cb.cb = cb;
+            m_eq_eh(ctx, &i_cb, m_internal2var[u], m_internal2var[v]);
+        };
+        m_ctx->user_propagate_register_eq(i_eq_eh);
+    }
+
+    void init_i_diseq_eh() {
+        if (!m_diseq_eh)
+            return;
+        i_diseq_eh = [this](void* ctx, user_propagator::callback* cb, unsigned u, unsigned v) {
+            i_cb.t = this;
+            i_cb.cb = cb;
+            m_diseq_eh(ctx, &i_cb, m_internal2var[u], m_internal2var[v]);
+        };
+        m_ctx->user_propagate_register_diseq(i_diseq_eh);
+    }
+
+
+    void user_propagate_delay_init() {
+        if (!m_user_ctx)
+            return;
+        m_ctx->user_propagate_init(m_user_ctx, m_push_eh, m_pop_eh, m_fresh_eh);
+        init_i_fixed_eh();
+        init_i_final_eh();
+        init_i_eq_eh();
+        init_i_diseq_eh();
+
+        unsigned i = 0;
+        for (expr* v : m_vars) {
+            unsigned j = m_ctx->user_propagate_register(v);
+            m_var2internal.setx(i, j, 0);
+            m_internal2var.setx(j, i, 0);
+            ++i;
+        }    
+    }
+
+    void user_propagate_init(
+        void* ctx,
+        user_propagator::push_eh_t& push_eh,
+        user_propagator::pop_eh_t& pop_eh,
+        user_propagator::fresh_eh_t& fresh_eh) override {
+        m_vars.reset();
+        m_fixed_eh = nullptr;
+        m_final_eh = nullptr;
+        m_eq_eh = nullptr;
+        m_diseq_eh = nullptr;
+        m_user_ctx = ctx;
+        m_push_eh = push_eh;
+        m_pop_eh = pop_eh;
+        m_fresh_eh = fresh_eh;
+    }
+
+    void user_propagate_register_fixed(user_propagator::fixed_eh_t& fixed_eh) override {
+        m_fixed_eh = fixed_eh;
+    }
+
+    void user_propagate_register_final(user_propagator::final_eh_t& final_eh) override {
+        m_final_eh = final_eh;
+    }
+
+    void user_propagate_register_eq(user_propagator::eq_eh_t& eq_eh) override {
+        m_eq_eh = eq_eh;
+    }
+
+    void user_propagate_register_diseq(user_propagator::eq_eh_t& diseq_eh) override {
+        m_diseq_eh = diseq_eh;
+    }
+
+    unsigned user_propagate_register(expr* e) override {
+        m_vars.push_back(e);
+        return m_vars.size() - 1;
+    }
+};
+
+static tactic * mk_seq_smt_tactic(ast_manager& m, params_ref const & p) {
+    return alloc(smt_tactic, m, p);
+}
+
+
+tactic * mk_parallel_smt_tactic(ast_manager& m, params_ref const& p) {
+    return mk_parallel_tactic(mk_smt_solver(m, p, symbol::null), p);
+}
+
+tactic * mk_smt_tactic_core(ast_manager& m, params_ref const& p, symbol const& logic) {
+    parallel_params pp(p);
+    return pp.enable() ? mk_parallel_tactic(mk_smt_solver(m, p, logic), p) : mk_seq_smt_tactic(m, p);
+}
+
+tactic * mk_smt_tactic_core_using(ast_manager& m, bool auto_config, params_ref const& _p) {
+    parallel_params pp(_p);
+    params_ref p = _p;
+    p.set_bool("auto_config", auto_config);
+    return using_params(pp.enable() ? mk_parallel_smt_tactic(m, p) : mk_seq_smt_tactic(m, p), p);
+}
+
diff --git a/src/smt/tactic/smt_tactic_core.cpp b/src/smt/tactic/smt_tactic_core.cpp
index 8aae7a197..d7ebce617 100644
--- a/src/smt/tactic/smt_tactic_core.cpp
+++ b/src/smt/tactic/smt_tactic_core.cpp
@@ -339,7 +339,7 @@ public:
             lhs.reset();
             rhs.reset();
             for (unsigned i = 0; i < num_fixed; ++i)
-                fixed.push_back(t->m_var2internal[i]);
+                fixed.push_back(t->m_var2internal[fixed_ids[i]]);
             for (unsigned i = 0; i < num_eqs; ++i) {
                 lhs.push_back(t->m_var2internal[eq_lhs[i]]);
                 rhs.push_back(t->m_var2internal[eq_rhs[i]]);