diff --git a/src/api/api_config_params.cpp b/src/api/api_config_params.cpp
index fd7c94f22..1b551bd73 100644
--- a/src/api/api_config_params.cpp
+++ b/src/api/api_config_params.cpp
@@ -47,7 +47,7 @@ extern "C" {
         env_params::updt_params();
     }
     
-    Z3_bool_opt Z3_API Z3_global_param_get(Z3_string param_id, Z3_string_ptr param_value) {
+    Z3_bool Z3_API Z3_global_param_get(Z3_string param_id, Z3_string_ptr param_value) {
         memory::initialize(UINT_MAX);
         LOG_Z3_global_param_get(param_id, param_value);
         *param_value = nullptr;
diff --git a/src/api/z3_api.h b/src/api/z3_api.h
index d5bd1e11c..3f964adc6 100644
--- a/src/api/z3_api.h
+++ b/src/api/z3_api.h
@@ -1516,7 +1516,7 @@ extern "C" {
 
        def_API('Z3_global_param_get', BOOL, (_in(STRING), _out(STRING)))
     */
-    Z3_bool_opt Z3_API Z3_global_param_get(Z3_string param_id, Z3_string_ptr param_value);
+    Z3_bool Z3_API Z3_global_param_get(Z3_string param_id, Z3_string_ptr param_value);
 
     /**@}*/
 
@@ -4325,7 +4325,7 @@ extern "C" {
 
         def_API('Z3_get_finite_domain_sort_size', BOOL, (_in(CONTEXT), _in(SORT), _out(UINT64)))
     */
-    Z3_bool_opt Z3_API Z3_get_finite_domain_sort_size(Z3_context c, Z3_sort s, uint64_t* r);
+    Z3_bool Z3_API Z3_get_finite_domain_sort_size(Z3_context c, Z3_sort s, uint64_t* r);
 
     /**
        \brief Return the domain of the given array sort.
@@ -5264,7 +5264,7 @@ extern "C" {
 
        def_API('Z3_model_eval', BOOL, (_in(CONTEXT), _in(MODEL), _in(AST), _in(BOOL), _out(AST)))
     */
-    Z3_bool_opt Z3_API Z3_model_eval(Z3_context c, Z3_model m, Z3_ast t, bool model_completion, Z3_ast * v);
+    Z3_bool Z3_API Z3_model_eval(Z3_context c, Z3_model m, Z3_ast t, bool model_completion, Z3_ast * v);
 
     /**
        \brief Return the interpretation (i.e., assignment) of constant \c a in the model \c m.
diff --git a/src/api/z3_macros.h b/src/api/z3_macros.h
index d1ac18804..d42eb508a 100644
--- a/src/api/z3_macros.h
+++ b/src/api/z3_macros.h
@@ -4,9 +4,6 @@ Copyright (c) 2015 Microsoft Corporation
 
 --*/
 
-#ifndef Z3_bool_opt
-#define Z3_bool_opt Z3_bool
-#endif
 
 #ifndef Z3_API
 # ifdef __GNUC__
diff --git a/src/ast/rewriter/bool_rewriter.cpp b/src/ast/rewriter/bool_rewriter.cpp
index 4c2ed7e12..1e58db340 100644
--- a/src/ast/rewriter/bool_rewriter.cpp
+++ b/src/ast/rewriter/bool_rewriter.cpp
@@ -722,12 +722,12 @@ br_status bool_rewriter::mk_eq_core(expr * lhs, expr * rhs, expr_ref & result) {
             return BR_DONE;
         }
 
-	    if (m().is_not(rhs))
+        if (m().is_not(rhs))
             std::swap(lhs, rhs);
 	
-	    if (m().is_not(lhs, lhs)) {
-	        result = m().mk_not(m().mk_eq(lhs, rhs));
-	        return BR_REWRITE2;
+        if (m().is_not(lhs, lhs)) {
+            result = m().mk_not(m().mk_eq(lhs, rhs));
+            return BR_REWRITE2;
         }
 	    
         if (unfolded) {
diff --git a/src/sat/smt/q_mam.cpp b/src/sat/smt/q_mam.cpp
index a968314c2..3debc3e47 100644
--- a/src/sat/smt/q_mam.cpp
+++ b/src/sat/smt/q_mam.cpp
@@ -424,15 +424,19 @@ namespace q {
         friend class compiler;
         friend class code_tree_manager;
 
-        void display_seq(std::ostream & out, instruction * head, unsigned indent) const {
-            for (unsigned i = 0; i < indent; i++) {
+        void spaces(std::ostream& out, unsigned indent) const {
+            for (unsigned i = 0; i < indent; i++) 
                 out << "    ";
-            }
+        }
+
+        void display_seq(std::ostream & out, instruction * head, unsigned indent) const {
+            spaces(out, indent);
             instruction * curr = head;
             out << *curr;
             curr = curr->m_next;
             while (curr != nullptr && curr->m_opcode != CHOOSE && curr->m_opcode != NOOP) {
                 out << "\n";
+                spaces(out, indent);
                 out << *curr;
                 curr = curr->m_next;
             }
@@ -598,7 +602,7 @@ namespace q {
                 ast_manager & m = m_egraph->get_manager();
                 out << "patterns:\n";
                 for (auto [q, a] : m_patterns) 
-                    out << mk_pp(q, m) << " " << mk_pp(a, m) << "\n";
+                    out << q->get_id() << ": " << mk_pp(q, m) << " " << mk_pp(a, m) << "\n";
             }
 #endif
             out << "function: " << m_root_lbl->get_name();
@@ -2878,8 +2882,10 @@ namespace q {
                 if (tree->expected_num_args() == p->get_num_args()) 
                     m_compiler.insert(tree, qa, mp, first_idx, false);
             }
-            DEBUG_CODE(m_trees[lbl_id]->get_patterns().push_back(std::make_pair(qa, mp));
-                       ctx.push(push_back_trail<std::pair<quantifier*,app*>, false>(m_trees[lbl_id]->get_patterns())););
+            DEBUG_CODE(if (first_idx == 0) {
+                m_trees[lbl_id]->get_patterns().push_back(std::make_pair(qa, mp));
+                ctx.push(push_back_trail<std::pair<quantifier*, app*>, false>(m_trees[lbl_id]->get_patterns()));
+            });
             TRACE("trigger_bug", tout << "after add_pattern, first_idx: " << first_idx << "\n"; m_trees[lbl_id]->display(tout););
         }
 
diff --git a/src/sat/smt/q_queue.cpp b/src/sat/smt/q_queue.cpp
index d74ee4e39..c30009127 100644
--- a/src/sat/smt/q_queue.cpp
+++ b/src/sat/smt/q_queue.cpp
@@ -149,12 +149,7 @@ namespace q {
         if (false && em.propagate(true, f.nodes(), gen, *f.c, new_propagation))
             return;
 
-#if 0
-        std::cout << mk_pp(q, m) << "\n";
-        std::cout << num_bindings << "\n";
-        for (unsigned i = 0; i < num_bindings; ++i)
-            std::cout << mk_pp(f[i]->get_expr(), m) << " " << mk_pp(f[i]->get_sort(), m) << "\n";
-#endif
+
         auto* ebindings = m_subst(q, num_bindings);
         for (unsigned i = 0; i < num_bindings; ++i)
             ebindings[i] = f[i]->get_expr();
@@ -168,7 +163,14 @@ namespace q {
 
         m_stats.m_num_instances++;
 
-        // f.display(ctx, std::cout << mk_pp(f.q(), m) << "\n" << instance << "\n") <<  "\n";
+        std::cout << "instantiate\n";
+        for (unsigned i = 0; i < num_bindings; ++i)
+            std::cout << ctx.bpp(f[i]) << " ";
+        std::cout << "\n";
+        std::cout << mk_pp(q, m) << "\n";
+
+
+//        f.display(ctx, std::cout << mk_pp(f.q(), m) << "\n" << instance << "\n") <<  "\n";
 
         
         euf::solver::scoped_generation _sg(ctx, gen);
diff --git a/src/smt/qi_queue.cpp b/src/smt/qi_queue.cpp
index f359136af..7c21c1362 100644
--- a/src/smt/qi_queue.cpp
+++ b/src/smt/qi_queue.cpp
@@ -226,6 +226,7 @@ namespace smt {
             ebindings[i] = bindings[i]->get_expr();
         expr_ref instance = m_subst();
 
+
         TRACE("qi_queue", tout << "new instance:\n" << mk_pp(instance, m) << "\n";);
         TRACE("qi_queue_instance", tout << "new instance:\n" << mk_pp(instance, m) << "\n";);
         expr_ref  s_instance(m);
@@ -244,6 +245,13 @@ namespace smt {
 
             return;
         }
+        std::cout << "instantiate\n";
+        enode_vector _bindings(num_bindings, bindings);
+        for (auto * b : _bindings)
+            std::cout << enode_pp(b, m_context) << " ";
+        std::cout << "\n";
+        std::cout << mk_pp(q, m) << "\n";
+        
         TRACE("qi_queue", tout << "simplified instance:\n" << s_instance << "\n";);
         stat->inc_num_instances();
         if (stat->get_num_instances() % m_params.m_qi_profile_freq == 0) {