diff --git a/Algebraic_kernel_d/include/CGAL/Algebraic_kernel_d/Curve_analysis_2.h b/Algebraic_kernel_d/include/CGAL/Algebraic_kernel_d/Curve_analysis_2.h
index 4758d20b215..c92ef9fbb98 100644
--- a/Algebraic_kernel_d/include/CGAL/Algebraic_kernel_d/Curve_analysis_2.h
+++ b/Algebraic_kernel_d/include/CGAL/Algebraic_kernel_d/Curve_analysis_2.h
@@ -856,7 +856,7 @@ private:
         
             size_type mult_of_resultant  = event.mult_of_prim_res_root;
 
-/*
+            // AF was commented
 #if CGAL_ACK_DEBUG_FLAG
             CGAL_ACK_DEBUG_PRINT << "Event line for " << index << " " 
                                  << root_of_resultant << " " 
@@ -865,7 +865,7 @@ private:
                                  << left_arcs << " " << right_arcs 
                                  << std::endl;
 #endif
-*/
+
 
             Status_line_1 ev_line 
                 = event_line_builder().create_event_line(index,
diff --git a/Algebraic_kernel_d/include/CGAL/Algebraic_kernel_d/Curve_pair_analysis_2.h b/Algebraic_kernel_d/include/CGAL/Algebraic_kernel_d/Curve_pair_analysis_2.h
index 9a3b7d45403..ea1c4c926d9 100644
--- a/Algebraic_kernel_d/include/CGAL/Algebraic_kernel_d/Curve_pair_analysis_2.h
+++ b/Algebraic_kernel_d/include/CGAL/Algebraic_kernel_d/Curve_pair_analysis_2.h
@@ -633,6 +633,10 @@ public:
         CGAL_assertion(i>=0 && 
                        i < static_cast<size_type>
                            (event_indices().size()));
+
+        for(int j = 0; j < event_indices().size(); j++){
+          std::cout << "event_indices["<< j << "] = " << event_indices()[j].fg << " " << event_indices()[j].ffy << " "<< event_indices()[j].ggy << std::endl;
+        }
         return event_indices()[i];
     } 
 
@@ -1429,18 +1433,19 @@ compute_event_x_coordinates_with_event_indices() const {
     std::vector<Event_indices>& event_indices
         = this->ptr()->event_indices.get();
     for(size_type i=0;i<static_cast<size_type>(events.size());i++) {
-/*
+
         #if CGAL_ACK_DEBUG_FLAG
+      std::cout << " events["<< i << "] = ";
         CGAL_ACK_DEBUG_PRINT << CGAL::to_double(events[i]) << std::flush;
         #endif
-*/
+
         switch(events_type[i]) {
         case(CGAL::internal::ROOT_OF_FIRST_SET): {
-/*
+
 #if CGAL_ACK_DEBUG_FLAG
                 CGAL_ACK_DEBUG_PRINT << " one curve event" << std::endl;
 #endif
-*/
+
             this->ptr()->event_slices.push_back(Lazy_status_line_CPA_1());
             switch(*(one_curve_it++)) {
             case(CGAL::internal::ROOT_OF_FIRST_SET): {
@@ -1463,11 +1468,11 @@ compute_event_x_coordinates_with_event_indices() const {
             break;
         }
         case(CGAL::internal::ROOT_OF_SECOND_SET): {
-/*
+
 #if CGAL_ACK_DEBUG_FLAG
             CGAL_ACK_DEBUG_PRINT << " two curve event" << std::endl;
 #endif
-*/
+
             this->ptr()->
                 event_slices.push_back(Lazy_status_line_CPA_1());
             
@@ -1477,12 +1482,12 @@ compute_event_x_coordinates_with_event_indices() const {
             break;
         }
         case(CGAL::internal::ROOT_OF_BOTH_SETS): {
-/*
+
 #if CGAL_ACK_DEBUG_FLAG
             CGAL_ACK_DEBUG_PRINT << " one and two curve event" 
                                      << std::endl;
 #endif
-*/
+
             this->ptr()->event_slices.push_back(Lazy_status_line_CPA_1());
             
             
diff --git a/Algebraic_kernel_d/test/Algebraic_kernel_d/Curve_pair_analysis_2.cpp b/Algebraic_kernel_d/test/Algebraic_kernel_d/Curve_pair_analysis_2.cpp
index 3901f71ee5b..d98feaa3b6c 100644
--- a/Algebraic_kernel_d/test/Algebraic_kernel_d/Curve_pair_analysis_2.cpp
+++ b/Algebraic_kernel_d/test/Algebraic_kernel_d/Curve_pair_analysis_2.cpp
@@ -1,3 +1,5 @@
+#define  CGAL_ACK_DEBUG_FLAG 1
+
 // TODO: Add licence
 //
 // This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
@@ -14,21 +16,13 @@
 #include <CGAL/config.h>
 #include <CGAL/Algebraic_kernel_d/flags.h>
 
-// Switches on/off tests for Sqrt-extension types
-#if CGAL_ACK_WITH_ROTATIONS
-#ifndef DO_SQRT_EXTENSION_TESTS
-#define DO_SQRT_EXTENSION_TESTS 1
-#endif
-#endif
+
 
 #include <CGAL/basic.h>
 
 #include <sstream>
 
-#if CGAL_ACK_USE_EXACUS
-#include <AcX/Algebraic_curve_2.h>
-#include <AcX/Algebraic_curve_pair_2.h>
-#endif
+
 
 #include <CGAL/Arithmetic_kernel.h>
 
@@ -55,9 +49,7 @@ void test_routine() {
     typedef typename Arithmetic_kernel::Integer Integer;
     
     typedef Integer Coefficient;
-    typedef typename 
-        CGAL::Polynomial_type_generator<Coefficient,1>::Type Poly_1;
-    CGAL_USE_TYPE(Poly_1);
+  
     typedef typename 
         CGAL::Polynomial_type_generator<Coefficient,2>::Type Poly_2;
     
@@ -73,20 +65,9 @@ void test_routine() {
     typedef CGAL::Algebraic_kernel_d_1<Coefficient,Rational,Rep_class, Isolator> 
         Algebraic_kernel_d_1;
 
-    typedef typename Algebraic_kernel_d_1::Algebraic_real_1 Algebraic_real;
-    CGAL_USE_TYPE(Algebraic_real);
 
-#if CGAL_ACK_USE_EXACUS
-    typedef AcX::Algebraic_curve_2<Algebraic_kernel_d_1> Algebraic_curve_2;
-    typedef AcX::Algebraic_curve_pair_2<Algebraic_curve_2> 
-        Algebraic_curve_pair_2;
-    typedef CGAL::Algebraic_curve_kernel_2<Algebraic_curve_pair_2,
-        Algebraic_kernel_d_1> 
-        Algebraic_kernel_d_2;    
-#else
     typedef CGAL::Algebraic_curve_kernel_2<Algebraic_kernel_d_1> 
         Algebraic_kernel_d_2;
-#endif
 
     Algebraic_kernel_d_2 kernel;
     
@@ -103,371 +84,7 @@ void test_routine() {
         construct_curve_pair_2 
         = kernel.construct_curve_pair_2_object();
 
-
-    {
-        Poly_2 f=from_string<Poly_2>("P[4(0,P[4(3,-1)(4,2)])(2,P[1(1,1)])(4,P[0(0,1)])]");
-        Poly_2 g=from_string<Poly_2>("P[4(0,P[4(4,1)])(1,P[2(2,1)])(3,P[0(0,-1)])(4,P[0(0,2)])]");
-        Curve_analysis_2 c1=construct_curve_2(f);
-        Curve_analysis_2 c2=construct_curve_2(g);
-        Curve_pair_analysis_2 curve_pair=construct_curve_pair_2(c1,c2);
-        assert(curve_pair.number_of_status_lines_with_event()==10);
-        typedef typename Curve_pair_analysis_2::Status_line_1 Status_line_1;
-#if CGAL_ACK_USE_EXACUS
-        typedef SoX::Index_triple Triple;
-#else
-        typedef CGAL::internal::Event_indices<int> Triple;
-#endif
-        int i;
-        {
-            i=0;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(! slice.is_intersection());
-            assert(slice.number_of_events()==0);
-        }  
-        {
-            i=0;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==-1);
-            assert(triple.ffy==-1);
-            assert(triple.ggy==0);
-            //assert(slice.event_of_curve(i,0)==-1);
-            //assert(slice.event_of_curve(i,1)==0);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(! slice.is_intersection());
-            assert(slice.number_of_events()==1);
-            assert(slice.curves_at_event(0).first==-1);
-            assert(slice.curves_at_event(0).second==0);
-        }
-        {
-            i=1;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==2);
-            assert(slice.curves_at_event(0).first==-1);
-            assert(slice.curves_at_event(0).second==0);
-            assert(slice.curves_at_event(1).first==-1);
-            assert(slice.curves_at_event(1).second==1);
-        }
-        {
-            i=1;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==-1);
-            assert(triple.ffy==-1);
-            assert(triple.ggy==1);
-            //assert(slice.event_of_curve(i,0)==-1);
-            //assert(slice.event_of_curve(i,1)==0);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(! slice.is_intersection());
-            assert(slice.number_of_events()==3);
-            assert(slice.curves_at_event(0).first==-1);
-            assert(slice.curves_at_event(0).second==0);
-            assert(slice.curves_at_event(1).first==-1);
-            assert(slice.curves_at_event(1).second==1);
-            assert(slice.curves_at_event(2).first==-1);
-            assert(slice.curves_at_event(2).second==2);
-        }
-        {
-            i=2;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==4);
-            assert(slice.curves_at_event(0).first==-1);
-            assert(slice.curves_at_event(0).second==0);
-            assert(slice.curves_at_event(1).first==-1);
-            assert(slice.curves_at_event(1).second==1);
-            assert(slice.curves_at_event(2).first==-1);
-            assert(slice.curves_at_event(2).second==2);
-            assert(slice.curves_at_event(3).first==-1);
-            assert(slice.curves_at_event(3).second==3);
-        }
-        {
-            i=2;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==-1);
-            assert(triple.ffy==0);
-            assert(triple.ggy==-1);
-            //assert(slice.event_of_curve(i,0)==0);
-            //assert(slice.event_of_curve(i,1)==-1);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(! slice.is_intersection());
-            assert(slice.number_of_events()==6);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==-1);
-            assert(slice.curves_at_event(1).second==0);
-            assert(slice.curves_at_event(2).first==-1);
-            assert(slice.curves_at_event(2).second==1);
-            assert(slice.curves_at_event(3).first==1);
-            assert(slice.curves_at_event(3).second==-1);
-            assert(slice.curves_at_event(4).first==-1);
-            assert(slice.curves_at_event(4).second==2);
-            assert(slice.curves_at_event(5).first==-1);
-            assert(slice.curves_at_event(5).second==3);
-        }
-        {
-            i=3;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==8);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==1);
-            assert(slice.curves_at_event(1).second==-1);
-            assert(slice.curves_at_event(2).first==-1);
-            assert(slice.curves_at_event(2).second==0);
-            assert(slice.curves_at_event(3).first==-1);
-            assert(slice.curves_at_event(3).second==1);
-            assert(slice.curves_at_event(4).first==2);
-            assert(slice.curves_at_event(4).second==-1);
-            assert(slice.curves_at_event(5).first==3);
-            assert(slice.curves_at_event(5).second==-1);
-            assert(slice.curves_at_event(6).first==-1);
-            assert(slice.curves_at_event(6).second==2);
-            assert(slice.curves_at_event(7).first==-1);
-            assert(slice.curves_at_event(7).second==3);
-        }
-        {
-            i=3;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==0);
-            assert(triple.ffy==-1);
-            assert(triple.ggy==-1);
-            //assert(slice.event_of_curve(i,0)==-1);
-            //assert(slice.event_of_curve(i,1)==-1);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(slice.is_intersection());
-            assert(slice.number_of_events()==7);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==1);
-            assert(slice.curves_at_event(1).second==-1);
-            assert(slice.curves_at_event(2).first==-1);
-            assert(slice.curves_at_event(2).second==0);
-            assert(slice.curves_at_event(3).first==-1);
-            assert(slice.curves_at_event(3).second==1);
-            assert(slice.curves_at_event(4).first==2);
-            assert(slice.curves_at_event(4).second==-1);
-            assert(slice.curves_at_event(5).first==3);
-            assert(slice.curves_at_event(5).second==2);
-            assert(slice.curves_at_event(6).first==-1);
-            assert(slice.curves_at_event(6).second==3);
-
-            assert(slice.multiplicity_of_intersection(5)==1);
-        }
-        {
-            i=4;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==8);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==1);
-            assert(slice.curves_at_event(1).second==-1);
-            assert(slice.curves_at_event(2).first==-1);
-            assert(slice.curves_at_event(2).second==0);
-            assert(slice.curves_at_event(3).first==-1);
-            assert(slice.curves_at_event(3).second==1);
-            assert(slice.curves_at_event(4).first==2);
-            assert(slice.curves_at_event(4).second==-1);
-            assert(slice.curves_at_event(5).first==-1);
-            assert(slice.curves_at_event(5).second==2);
-            assert(slice.curves_at_event(6).first==3);
-            assert(slice.curves_at_event(6).second==-1);
-            assert(slice.curves_at_event(7).first==-1);
-            assert(slice.curves_at_event(7).second==3);
-        }
-        {
-            i=4;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==1);
-            assert(triple.ffy==1);
-            assert(triple.ggy==2);
-            //assert(slice.event_of_curve(i,0)==1);
-            //assert(slice.event_of_curve(i,1)==2);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(slice.is_intersection());
-            assert(slice.number_of_events()==2);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==0);
-            assert(slice.curves_at_event(1).first==-1);
-            assert(slice.curves_at_event(1).second==1);
-        } 
-        {
-            i=5;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==6);
-            assert(slice.curves_at_event(0).first==-1);
-            assert(slice.curves_at_event(0).second==0);
-            assert(slice.curves_at_event(1).first==0);
-            assert(slice.curves_at_event(1).second==-1);
-            assert(slice.curves_at_event(2).first==-1);
-            assert(slice.curves_at_event(2).second==1);
-            assert(slice.curves_at_event(3).first==1);
-            assert(slice.curves_at_event(3).second==-1);
-            assert(slice.curves_at_event(4).first==-1);
-            assert(slice.curves_at_event(4).second==2);
-            assert(slice.curves_at_event(5).first==-1);
-            assert(slice.curves_at_event(5).second==3);
-        }
-        {
-            i=5;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==-1);
-            assert(triple.ffy==-1);
-            assert(triple.ggy==3);
-            //assert(slice.event_of_curve(i,0)==-1);
-            //assert(slice.event_of_curve(i,1)==-1);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(! slice.is_intersection());
-            assert(slice.number_of_events()==5);
-            assert(slice.curves_at_event(0).first==-1);
-            assert(slice.curves_at_event(0).second==0);
-            assert(slice.curves_at_event(1).first==0);
-            assert(slice.curves_at_event(1).second==-1);
-            assert(slice.curves_at_event(2).first==-1);
-            assert(slice.curves_at_event(2).second==1);
-            assert(slice.curves_at_event(3).first==1);
-            assert(slice.curves_at_event(3).second==-1);
-            assert(slice.curves_at_event(4).first==-1);
-            assert(slice.curves_at_event(4).second==2);
-        }
-        {
-            i=6;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==4);
-            assert(slice.curves_at_event(0).first==-1);
-            assert(slice.curves_at_event(0).second==0);
-            assert(slice.curves_at_event(1).first==0);
-            assert(slice.curves_at_event(1).second==-1);
-            assert(slice.curves_at_event(2).first==-1);
-            assert(slice.curves_at_event(2).second==1);
-            assert(slice.curves_at_event(3).first==1);
-            assert(slice.curves_at_event(3).second==-1);
-        }
-        {
-            i=6;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==2);
-            assert(triple.ffy==-1);
-            assert(triple.ggy==-1);
-            //assert(slice.event_of_curve(i,0)==-1);
-            //assert(slice.event_of_curve(i,1)==-1);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(slice.is_intersection());
-            assert(slice.number_of_events()==3);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==0);
-            assert(slice.curves_at_event(1).first==-1);
-            assert(slice.curves_at_event(1).second==1);
-            assert(slice.curves_at_event(2).first==1);
-            assert(slice.curves_at_event(2).second==-1);
-            assert(slice.multiplicity_of_intersection(0)==1);
-        }
-        {
-            i=7;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==4);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==-1);
-            assert(slice.curves_at_event(1).second==0);
-            assert(slice.curves_at_event(2).first==-1);
-            assert(slice.curves_at_event(2).second==1);
-            assert(slice.curves_at_event(3).first==1);
-            assert(slice.curves_at_event(3).second==-1);
-        }
-        {
-            i=7;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==-1);
-            assert(triple.ffy==-1);
-            assert(triple.ggy==4);
-            //assert(slice.event_of_curve(i,0)==-1);
-            //assert(slice.event_of_curve(i,1)==4);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(! slice.is_intersection());
-            assert(slice.number_of_events()==3);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==-1);
-            assert(slice.curves_at_event(1).second==0);
-            assert(slice.curves_at_event(2).first==1);
-            assert(slice.curves_at_event(2).second==-1);
-        }
-        {
-            i=8;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==2);
-             assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==1);
-            assert(slice.curves_at_event(1).second==-1);
-        }
-        {
-            i=8;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==-1);
-            assert(triple.ffy==2);
-            assert(triple.ggy==-1);
-            //assert(slice.event_of_curve(i,0)==2);
-            //assert(slice.event_of_curve(i,1)==-1);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(! slice.is_intersection());
-            assert(slice.number_of_events()==1);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-        }
-        {
-            i=9;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==0);
-        }
-        {
-            i=9;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==-1);
-            assert(triple.ffy==3);
-            assert(triple.ggy==-1);
-            //assert(slice.event_of_curve(i,0)==3);
-            //assert(slice.event_of_curve(i,1)==-1);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(! slice.is_intersection());
-            assert(slice.number_of_events()==0);
-        }
-        {
-            i=10;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==0);
-        }
-   
-    }
+  
     {
         Poly_2 f=from_string<Poly_2>("P[4(0,P[1(0,1)(1,1)])(4,P[0(0,-1)])]");
         Poly_2 g=from_string<Poly_2>("P[2(0,P[2(0,-5)(2,6)])(2,P[0(0,4)])]");
@@ -477,675 +94,27 @@ void test_routine() {
         Curve_pair_analysis_2 curve_pair=construct_curve_pair_2(ca1,ca2);
         assert(curve_pair.number_of_status_lines_with_event()==7);
         typedef typename Curve_pair_analysis_2::Status_line_1 Status_line_1;
-#if CGAL_ACK_USE_EXACUS
-        typedef SoX::Index_triple Triple;
-#else
+
         typedef CGAL::internal::Event_indices<int> Triple;
-#endif
-        int i;
-        {
-            i=0;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==0);
-        }    
-        {
-            i=0;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==-1);
-            assert(triple.ffy==0);
-            assert(triple.ggy==-1);
-            //assert(slice.event_of_curve(i,0)==0);
-            //assert(slice.event_of_curve(i,1)==-1);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(! slice.is_intersection());
-            assert(slice.number_of_events()==1);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-        }
-        {
-            i=1;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==2);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==1);
-            assert(slice.curves_at_event(1).second==-1);
-        }
-        {
-            i=1;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==0);
-            assert(triple.ffy==-1);
-            assert(triple.ggy==-1);
-            //assert(slice.event_of_curve(i,0)==-1);
-            //assert(slice.event_of_curve(i,1)==-1);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(! slice.is_intersection());
-            assert(slice.number_of_events()==2);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==1);
-            assert(slice.curves_at_event(1).second==-1);
-        }
-        {
-            i=2;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==2);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==1);
-            assert(slice.curves_at_event(1).second==-1);
-        }
-        {
-            i=2;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==-1);
-            assert(triple.ffy==-1);
-            assert(triple.ggy==0);
-            //assert(slice.event_of_curve(i,0)==-1);
-            //assert(slice.event_of_curve(i,1)==0);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(! slice.is_intersection());
-            assert(slice.number_of_events()==3);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==-1);
-            assert(slice.curves_at_event(1).second==0);
-            assert(slice.curves_at_event(2).first==1);
-            assert(slice.curves_at_event(2).second==-1);
-            
-        }
-        {
-            i=3;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==4);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==-1);
-            assert(slice.curves_at_event(1).second==0);
-            assert(slice.curves_at_event(2).first==-1);
-            assert(slice.curves_at_event(2).second==1);
-            assert(slice.curves_at_event(3).first==1);
-            assert(slice.curves_at_event(3).second==-1);
-        }
-        {
-            i=3;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==1);
-            assert(triple.ffy==-1);
-            assert(triple.ggy==-1);
-            //assert(slice.event_of_curve(i,0)==-1);
-            //assert(slice.event_of_curve(i,1)==-1);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(slice.is_intersection());
-            assert(slice.number_of_events()==2);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==0);
-            assert(slice.curves_at_event(1).first==1);
-            assert(slice.curves_at_event(1).second==1);
-            assert(slice.multiplicity_of_intersection(0)==1);
-            assert(slice.multiplicity_of_intersection(1)==1);
-        }
-        {
-            i=4;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==4);
-            assert(slice.curves_at_event(0).first==-1);
-            assert(slice.curves_at_event(0).second==0);
-            assert(slice.curves_at_event(1).first==0);
-            assert(slice.curves_at_event(1).second==-1);
-            assert(slice.curves_at_event(2).first==1);
-            assert(slice.curves_at_event(2).second==-1);
-            assert(slice.curves_at_event(3).first==-1);
-            assert(slice.curves_at_event(3).second==1);
-        }
-        {
-            i=4;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==2);
-            assert(triple.ffy==-1);
-            assert(triple.ggy==-1);
-            //assert(slice.event_of_curve(i,0)==-1);
-            //assert(slice.event_of_curve(i,1)==-1);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(slice.is_intersection());
-            assert(slice.number_of_events()==2);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==0);
-            assert(slice.curves_at_event(1).first==1);
-            assert(slice.curves_at_event(1).second==1);
-            assert(slice.multiplicity_of_intersection(0)==1);
-            assert(slice.multiplicity_of_intersection(1)==1);
-        } 
-        {
-            i=5;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==4);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==-1);
-            assert(slice.curves_at_event(1).second==0);
-            assert(slice.curves_at_event(2).first==-1);
-            assert(slice.curves_at_event(2).second==1);
-            assert(slice.curves_at_event(3).first==1);
-            assert(slice.curves_at_event(3).second==-1);
-        }
-        {
-            i=5;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==-1);
-            assert(triple.ffy==-1);
-            assert(triple.ggy==1);
-            //assert(slice.event_of_curve(i,0)==-1);
-            //assert(slice.event_of_curve(i,1)==1);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(! slice.is_intersection());
-            assert(slice.number_of_events()==3);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==-1);
-            assert(slice.curves_at_event(1).second==0);
-            assert(slice.curves_at_event(2).first==1);
-            assert(slice.curves_at_event(2).second==-1);
-        }
-        {
-            i=6;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==2);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==1);
-            assert(slice.curves_at_event(1).second==-1);
-        }
-        {
-            i=6;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==3);
-            assert(triple.ffy==-1);
-            assert(triple.ggy==-1);
-            //assert(slice.event_of_curve(i,0)==-1);
-            //assert(slice.event_of_curve(i,1)==-1);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(! slice.is_intersection());
-            assert(slice.number_of_events()==2);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==1);
-            assert(slice.curves_at_event(1).second==-1);
-        }
-        {
-            i=7;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==2);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==1);
-            assert(slice.curves_at_event(1).second==-1);
-        }
+
+        int i=0;
+
+        Triple triple = curve_pair.event_indices(i);
+        assert(triple.fg==-1);
+        assert(triple.ffy==0);
+        assert(triple.ggy==-1);
+
     }
-    {
-        Poly_2 f=from_string<Poly_2>("P[4(0,P[4(3,-1)(4,2)])(2,P[1(1,1)])(4,P[0(0,1)])]");
-        Poly_2 g=from_string<Poly_2>("P[4(0,P[4(0,12)(1,-380)(2,4200)(3,-18000)(4,20000)])(2,P[1(0,-4000)(1,40000)])(4,P[0(0,160000)])]");
-        Curve_analysis_2 ca1=construct_curve_2(f), 
-            ca2=construct_curve_2(g);
-        Curve_pair_analysis_2 curve_pair=construct_curve_pair_2(ca1,ca2);
-        //assert(curve_pair.number_of_status_lines_with_event()==11);
-    
-    
-    }
-#if CGAL_ACK_WITH_ROTATIONS
-#if DO_SQRT_EXTENSION_TESTS
-    // Sqrt extension:
-    {
-        typedef CGAL::Sqrt_extension<Integer, Integer> Sqrt_extension;
 
-        typedef Sqrt_extension Coefficient;
-        typedef typename
-            CGAL::Polynomial_type_generator<Coefficient,1>::Type Poly_sqrt1;
-        typedef typename
-            CGAL::Polynomial_type_generator<Coefficient,2>::Type Poly_sqrt2;
 
-    
-        typedef CGAL::internal::Algebraic_real_quadratic_refinement_rep_bfi
-            < Coefficient, Rational > Rep_class;
-        typedef CGAL::internal::Bitstream_descartes
-            < CGAL::internal::Bitstream_descartes_rndl_tree_traits
-              < CGAL::internal::Bitstream_coefficient_kernel<Coefficient> 
-              > 
-            > 
-            Isolator;
 
-        typedef CGAL::Algebraic_kernel_d_1< Coefficient,Rational,
-                                          Rep_class, Isolator > 
-            Algebraic_kernel_d_1_with_sqrt;
-
-        Poly_sqrt2 f,g;
-        f=from_string<Poly_sqrt2>("P[4(0,P[4(3,EXT[0,-2,7])(4,EXT[0,4,7])])(2,P[1(1,EXT[0,2,7])])(4,P[0(0,EXT[0,2,7])])]");
-        g=from_string<Poly_sqrt2>("P[4(0,P[4(4,EXT[0,2,7])])(1,P[2(2,EXT[0,2,7])])(3,P[0(0,EXT[0,-2,7])])(4,P[0(0,EXT[0,4,7])])]");
-        
-        typedef CGAL::Algebraic_curve_kernel_2<Algebraic_kernel_d_1_with_sqrt>
-            Algebraic_kernel_d_2;
-
-        typedef typename Algebraic_kernel_d_2::Curve_analysis_2 Curve_analysis_2;
-        typedef typename Algebraic_kernel_d_2::Curve_pair_analysis_2 
-            Curve_pair_analysis_2;
-        
-        Algebraic_kernel_d_2 kernel;
-
-        typename Algebraic_kernel_d_2::Construct_curve_2
-            construct_curve_2 
-            = kernel.construct_curve_2_object();
-        
-        typename Algebraic_kernel_d_2::Construct_curve_pair_2
-            construct_curve_pair_2 
-            = kernel.construct_curve_pair_2_object();
-        
-        
-        Curve_analysis_2 c1=construct_curve_2(f), 
-            c2=construct_curve_2(g);
-
-        Curve_pair_analysis_2 curve_pair=construct_curve_pair_2(c1,c2);
-        assert(curve_pair.number_of_status_lines_with_event()==10);
-        typedef typename Curve_pair_analysis_2::Status_line_1 Status_line_1;
-        typedef CGAL::internal::Event_indices<int> Triple;
-        int i;
-    
-        {
-            i=0;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(! slice.is_intersection());
-            assert(slice.number_of_events()==0);
-        }    
-        {
-            i=0;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==-1);
-            assert(triple.ffy==-1);
-            assert(triple.ggy==0);
-            //assert(slice.event_of_curve(i,0)==-1);
-            //assert(slice.event_of_curve(i,1)==0);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(! slice.is_intersection());
-            assert(slice.number_of_events()==1);
-            assert(slice.curves_at_event(0).first==-1);
-            assert(slice.curves_at_event(0).second==0);
-        }
-        {
-            i=1;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==2);
-            assert(slice.curves_at_event(0).first==-1);
-            assert(slice.curves_at_event(0).second==0);
-            assert(slice.curves_at_event(1).first==-1);
-            assert(slice.curves_at_event(1).second==1);
-        }
-        {
-            i=1;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==-1);
-            assert(triple.ffy==-1);
-            assert(triple.ggy==1);
-            //assert(slice.event_of_curve(i,0)==-1);
-            //assert(slice.event_of_curve(i,1)==0);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(! slice.is_intersection());
-            assert(slice.number_of_events()==3);
-            assert(slice.curves_at_event(0).first==-1);
-            assert(slice.curves_at_event(0).second==0);
-            assert(slice.curves_at_event(1).first==-1);
-            assert(slice.curves_at_event(1).second==1);
-            assert(slice.curves_at_event(2).first==-1);
-            assert(slice.curves_at_event(2).second==2);
-        }
-        {
-            i=2;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==4);
-            assert(slice.curves_at_event(0).first==-1);
-            assert(slice.curves_at_event(0).second==0);
-            assert(slice.curves_at_event(1).first==-1);
-            assert(slice.curves_at_event(1).second==1);
-            assert(slice.curves_at_event(2).first==-1);
-            assert(slice.curves_at_event(2).second==2);
-            assert(slice.curves_at_event(3).first==-1);
-            assert(slice.curves_at_event(3).second==3);
-        }
-        {
-            i=2;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==-1);
-            assert(triple.ffy==0);
-            assert(triple.ggy==-1);
-            //assert(slice.event_of_curve(i,0)==0);
-            //assert(slice.event_of_curve(i,1)==-1);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(! slice.is_intersection());
-            assert(slice.number_of_events()==6);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==-1);
-            assert(slice.curves_at_event(1).second==0);
-            assert(slice.curves_at_event(2).first==-1);
-            assert(slice.curves_at_event(2).second==1);
-            assert(slice.curves_at_event(3).first==1);
-            assert(slice.curves_at_event(3).second==-1);
-            assert(slice.curves_at_event(4).first==-1);
-            assert(slice.curves_at_event(4).second==2);
-            assert(slice.curves_at_event(5).first==-1);
-            assert(slice.curves_at_event(5).second==3);
-        }
-        {
-            i=3;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==8);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==1);
-            assert(slice.curves_at_event(1).second==-1);
-            assert(slice.curves_at_event(2).first==-1);
-            assert(slice.curves_at_event(2).second==0);
-            assert(slice.curves_at_event(3).first==-1);
-            assert(slice.curves_at_event(3).second==1);
-            assert(slice.curves_at_event(4).first==2);
-            assert(slice.curves_at_event(4).second==-1);
-            assert(slice.curves_at_event(5).first==3);
-            assert(slice.curves_at_event(5).second==-1);
-            assert(slice.curves_at_event(6).first==-1);
-            assert(slice.curves_at_event(6).second==2);
-            assert(slice.curves_at_event(7).first==-1);
-            assert(slice.curves_at_event(7).second==3);
-        }
-        {
-            i=3;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==0);
-            assert(triple.ffy==-1);
-            assert(triple.ggy==-1);
-            //assert(slice.event_of_curve(i,0)==-1);
-            //assert(slice.event_of_curve(i,1)==-1);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(slice.is_intersection());
-            assert(slice.number_of_events()==7);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==1);
-            assert(slice.curves_at_event(1).second==-1);
-            assert(slice.curves_at_event(2).first==-1);
-            assert(slice.curves_at_event(2).second==0);
-            assert(slice.curves_at_event(3).first==-1);
-            assert(slice.curves_at_event(3).second==1);
-            assert(slice.curves_at_event(4).first==2);
-            assert(slice.curves_at_event(4).second==-1);
-            assert(slice.curves_at_event(5).first==3);
-            assert(slice.curves_at_event(5).second==2);
-            assert(slice.curves_at_event(6).first==-1);
-            assert(slice.curves_at_event(6).second==3);
-
-            assert(slice.multiplicity_of_intersection(5)==1);
-        }
-        {
-            i=4;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==8);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==1);
-            assert(slice.curves_at_event(1).second==-1);
-            assert(slice.curves_at_event(2).first==-1);
-            assert(slice.curves_at_event(2).second==0);
-            assert(slice.curves_at_event(3).first==-1);
-            assert(slice.curves_at_event(3).second==1);
-            assert(slice.curves_at_event(4).first==2);
-            assert(slice.curves_at_event(4).second==-1);
-            assert(slice.curves_at_event(5).first==-1);
-            assert(slice.curves_at_event(5).second==2);
-            assert(slice.curves_at_event(6).first==3);
-            assert(slice.curves_at_event(6).second==-1);
-            assert(slice.curves_at_event(7).first==-1);
-            assert(slice.curves_at_event(7).second==3);
-        }
-        {
-            i=4;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==1);
-            assert(triple.ffy==1);
-            assert(triple.ggy==2);
-            //assert(slice.event_of_curve(i,0)==1);
-            //assert(slice.event_of_curve(i,1)==2);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(slice.is_intersection());
-            assert(slice.number_of_events()==2);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==0);
-            assert(slice.curves_at_event(1).first==-1);
-            assert(slice.curves_at_event(1).second==1);
-        } 
-        {
-            i=5;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==6);
-            assert(slice.curves_at_event(0).first==-1);
-            assert(slice.curves_at_event(0).second==0);
-            assert(slice.curves_at_event(1).first==0);
-            assert(slice.curves_at_event(1).second==-1);
-            assert(slice.curves_at_event(2).first==-1);
-            assert(slice.curves_at_event(2).second==1);
-            assert(slice.curves_at_event(3).first==1);
-            assert(slice.curves_at_event(3).second==-1);
-            assert(slice.curves_at_event(4).first==-1);
-            assert(slice.curves_at_event(4).second==2);
-            assert(slice.curves_at_event(5).first==-1);
-            assert(slice.curves_at_event(5).second==3);
-        }
-        {
-            i=5;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==-1);
-            assert(triple.ffy==-1);
-            assert(triple.ggy==3);
-            //assert(slice.event_of_curve(i,0)==-1);
-            //assert(slice.event_of_curve(i,1)==-1);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(! slice.is_intersection());
-            assert(slice.number_of_events()==5);
-            assert(slice.curves_at_event(0).first==-1);
-            assert(slice.curves_at_event(0).second==0);
-            assert(slice.curves_at_event(1).first==0);
-            assert(slice.curves_at_event(1).second==-1);
-            assert(slice.curves_at_event(2).first==-1);
-            assert(slice.curves_at_event(2).second==1);
-            assert(slice.curves_at_event(3).first==1);
-            assert(slice.curves_at_event(3).second==-1);
-            assert(slice.curves_at_event(4).first==-1);
-            assert(slice.curves_at_event(4).second==2);
-        }
-        {
-            i=6;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==4);
-            assert(slice.curves_at_event(0).first==-1);
-            assert(slice.curves_at_event(0).second==0);
-            assert(slice.curves_at_event(1).first==0);
-            assert(slice.curves_at_event(1).second==-1);
-            assert(slice.curves_at_event(2).first==-1);
-            assert(slice.curves_at_event(2).second==1);
-            assert(slice.curves_at_event(3).first==1);
-            assert(slice.curves_at_event(3).second==-1);
-        }
-        {
-            i=6;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==2);
-            assert(triple.ffy==-1);
-            assert(triple.ggy==-1);
-            //assert(slice.event_of_curve(i,0)==-1);
-            //assert(slice.event_of_curve(i,1)==-1);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(slice.is_intersection());
-            assert(slice.number_of_events()==3);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==0);
-            assert(slice.curves_at_event(1).first==-1);
-            assert(slice.curves_at_event(1).second==1);
-            assert(slice.curves_at_event(2).first==1);
-            assert(slice.curves_at_event(2).second==-1);
-            assert(slice.multiplicity_of_intersection(0)==1);
-        }
-        {
-            i=7;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==4);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==-1);
-            assert(slice.curves_at_event(1).second==0);
-            assert(slice.curves_at_event(2).first==-1);
-            assert(slice.curves_at_event(2).second==1);
-            assert(slice.curves_at_event(3).first==1);
-            assert(slice.curves_at_event(3).second==-1);
-        }
-        {
-            i=7;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==-1);
-            assert(triple.ffy==-1);
-            assert(triple.ggy==4);
-            //assert(slice.event_of_curve(i,0)==-1);
-            //assert(slice.event_of_curve(i,1)==4);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(! slice.is_intersection());
-            assert(slice.number_of_events()==3);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==-1);
-            assert(slice.curves_at_event(1).second==0);
-            assert(slice.curves_at_event(2).first==1);
-            assert(slice.curves_at_event(2).second==-1);
-        }
-        {
-            i=8;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==2);
-             assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-            assert(slice.curves_at_event(1).first==1);
-            assert(slice.curves_at_event(1).second==-1);
-        }
-        {
-            i=8;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==-1);
-            assert(triple.ffy==2);
-            assert(triple.ggy==-1);
-            //assert(slice.event_of_curve(i,0)==2);
-            //assert(slice.event_of_curve(i,1)==-1);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(! slice.is_intersection());
-            assert(slice.number_of_events()==1);
-            assert(slice.curves_at_event(0).first==0);
-            assert(slice.curves_at_event(0).second==-1);
-        }
-        {
-            i=9;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==0);
-        }
-        {
-            i=9;
-            const Status_line_1& slice=curve_pair.status_line_at_event(i);
-            Triple triple = curve_pair.event_indices(i);
-            assert(triple.fg==-1);
-            assert(triple.ffy==3);
-            assert(triple.ggy==-1);
-            //assert(slice.event_of_curve(i,0)==3);
-            //assert(slice.event_of_curve(i,1)==-1);
-            assert(slice.index()==i);
-            assert(slice.is_event());
-            assert(! slice.is_intersection());
-            assert(slice.number_of_events()==0);
-        }
-        {
-            i=10;
-            const Status_line_1& slice=curve_pair.status_line_of_interval(i);
-            assert(! slice.is_event());
-            assert(slice.number_of_events()==0);
-        }
-   
-    }
-#endif
-#endif
 }
 
 
 int main() {
-#ifdef NDEBUG
-    std::cout << "Assertions switched off!" << std::endl;
-    return 0;
-#endif
-#ifdef CGAL_HAS_LEDA_ARITHMETIC_KERNEL
-    test_routine<CGAL::LEDA_arithmetic_kernel>();
-#else
-    std::cout << "LEDA tests skipped!" << std::endl;
-#endif
-#ifdef CGAL_HAS_CORE_ARITHMETIC_KERNEL
-    test_routine<CGAL::CORE_arithmetic_kernel>();
-#else
-    std::cout << "CORE tests skipped!" << std::endl;
-#endif
-#ifdef CGAL_HAS_GMP_ARITHMETIC_KERNEL
-    test_routine<CGAL::GMP_arithmetic_kernel>();
-#else
-    std::cout << "GMP tests skipped!" << std::endl;
-#endif
+
+
+  test_routine<CGAL::CORE_arithmetic_kernel>();
+
     return 0;
 }