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diff --git a/src/util/congruence_closure.cpp b/src/util/congruence_closure.cpp
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+/*********************                                                        */
+/*! \file congruence_closure.cpp
+ ** \verbatim
+ ** Original author: mdeters
+ ** Major contributors: none
+ ** Minor contributors (to current version): none
+ ** This file is part of the CVC4 prototype.
+ ** Copyright (c) 2009, 2010  The Analysis of Computer Systems Group (ACSys)
+ ** Courant Institute of Mathematical Sciences
+ ** New York University
+ ** See the file COPYING in the top-level source directory for licensing
+ ** information.\endverbatim
+ **
+ ** \brief The congruence closure module implementation
+ **
+ ** The congruence closure module implementation.
+ **/
+
+#include "util/congruence_closure.h"
+#include "util/Assert.h"
+
+#include <string>
+#include <list>
+#include <algorithm>
+#include <utility>
+#include <ext/hash_map>
+
+using namespace std;
+
+namespace CVC4 {
+
+
+}/* CVC4 namespace */