diff --git a/ChangeLog b/ChangeLog
index 3d79edc1e..e2273d1f5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2006-07-18  Alexandre Duret-Lutz  <adl@src.lip6.fr>
+
+	* src/misc/memusage.cc, src/misc/memusage.hh: New files.
+	* src/misc/Makefile.am: Add them.
+	* src/tgbaalgos/gtec/gtec.cc,
+	src/tgbaalgos/gtec/gtec.hh: Add a "vmsize" statistic.
+
 2006-07-14  Alexandre Duret-Lutz  <adl@src.lip6.fr>
 
 	* src/tgba/bdddict.cc, src/tgba/bdddict.hh (free_annonymous_list_of):
diff --git a/src/misc/Makefile.am b/src/misc/Makefile.am
index 0e78e6567..41771fd0d 100644
--- a/src/misc/Makefile.am
+++ b/src/misc/Makefile.am
@@ -1,4 +1,4 @@
-## Copyright (C) 2003, 2004, 2005  Laboratoire d'Informatique de Paris 6 (LIP6),
+## Copyright (C) 2003, 2004, 2005, 2006  Laboratoire d'Informatique de Paris 6 (LIP6),
 ## département Systèmes Répartis Coopératifs (SRC), Université Pierre
 ## et Marie Curie.
 ##
@@ -34,6 +34,7 @@ misc_HEADERS = \
   hashfunc.hh \
   ltstr.hh \
   minato.hh \
+  memusage.hh \
   modgray.hh \
   optionmap.hh \
   random.hh \
@@ -46,6 +47,7 @@ libmisc_la_SOURCES = \
   bddalloc.cc \
   escape.cc \
   freelist.cc \
+  memusage.cc \
   minato.cc \
   modgray.cc \
   optionmap.cc \
diff --git a/src/misc/memusage.cc b/src/misc/memusage.cc
new file mode 100644
index 000000000..ce897eb66
--- /dev/null
+++ b/src/misc/memusage.cc
@@ -0,0 +1,44 @@
+// Copyright (C) 2006  Laboratoire d'Informatique de Paris 6 (LIP6),
+// département Systèmes Répartis Coopératifs (SRC), Université Pierre
+// et Marie Curie.
+//
+// This file is part of Spot, a model checking library.
+//
+// Spot is free software; you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// Spot is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+// or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+// License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Spot; see the file COPYING.  If not, write to the Free
+// Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+// 02111-1307, USA.
+
+#include "memusage.hh"
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <cstdio>
+
+namespace spot
+{
+  int
+  memusage()
+  {
+    int size;
+
+    FILE* file = fopen("/proc/self/statm", "r");
+    if (!file)
+      return -1;
+    int res = fscanf(file, "%d", &size);
+    (void) fclose(file);
+    if (res != 1)
+      return -1;
+    return size;
+  }
+
+}
diff --git a/src/misc/memusage.hh b/src/misc/memusage.hh
new file mode 100644
index 000000000..29f3bfe86
--- /dev/null
+++ b/src/misc/memusage.hh
@@ -0,0 +1,35 @@
+// Copyright (C) 2006  Laboratoire d'Informatique de Paris 6 (LIP6),
+// département Systèmes Répartis Coopératifs (SRC), Université Pierre
+// et Marie Curie.
+//
+// This file is part of Spot, a model checking library.
+//
+// Spot is free software; you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// Spot is distributed in the hope that it will be useful, but WITHOUT
+// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+// or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+// License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Spot; see the file COPYING.  If not, write to the Free
+// Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+// 02111-1307, USA.
+
+#ifndef SPOT_MISC_MEMUSAGE_HH
+# define SPOT_MISC_MEMUSAGE_HH
+
+
+namespace spot
+{
+  /// \brief Total number of pages in use by the program.
+  ///
+  /// \return The total number of pages in use by the program if known.
+  /// -1 otherwise.
+  int memusage();
+}
+
+#endif // SPOT_MISC_MEMUSAGE_HH
diff --git a/src/tgbaalgos/gtec/gtec.cc b/src/tgbaalgos/gtec/gtec.cc
index adb1cb030..c71fbb0ae 100644
--- a/src/tgbaalgos/gtec/gtec.cc
+++ b/src/tgbaalgos/gtec/gtec.cc
@@ -21,6 +21,7 @@
 
 #include "gtec.hh"
 #include "ce.hh"
+#include "misc/memusage.hh"
 
 namespace spot
 {
@@ -40,6 +41,9 @@ namespace spot
     stats["removed components"] =
 	static_cast<spot::unsigned_statistics::unsigned_fun>
 	(&couvreur99_check::get_removed_components);
+    stats["vmsize"] =
+	static_cast<spot::unsigned_statistics::unsigned_fun>
+	(&couvreur99_check::get_vmsize);
   }
 
   couvreur99_check::~couvreur99_check()
@@ -53,6 +57,15 @@ namespace spot
     return removed_components;
   }
 
+  unsigned
+  couvreur99_check::get_vmsize() const
+  {
+    int size = memusage();
+    if (size > 0)
+      return size;
+    return 0;
+  }
+
   void
   couvreur99_check::remove_component(const state* from)
   {
diff --git a/src/tgbaalgos/gtec/gtec.hh b/src/tgbaalgos/gtec/gtec.hh
index 85110aff5..de1918081 100644
--- a/src/tgbaalgos/gtec/gtec.hh
+++ b/src/tgbaalgos/gtec/gtec.hh
@@ -183,6 +183,7 @@ namespace spot
     /// Number of dead SCC removed by the algorithm.
     unsigned removed_components;
     unsigned get_removed_components() const;
+    unsigned get_vmsize() const;
   };
 
   /// \brief A version of spot::couvreur99_check that tries to visit