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diff --git a/examples/hashsmt/sha1_collision.cpp b/examples/hashsmt/sha1_collision.cpp
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+++ b/examples/hashsmt/sha1_collision.cpp
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+/*********************                                                        */
+/*! \file sha1smt.cpp
+ ** \verbatim
+ ** Original author: Dejan Jovanovic
+ ** Major contributors: Morgan Deters
+ ** Minor contributors (to current version): none
+ ** This file is part of the CVC4 project.
+ ** Copyright (c) 2009-2013  New York University and The University of Iowa
+ ** See the file COPYING in the top-level source directory for licensing
+ ** information.\endverbatim
+ **
+ ** \brief [[ Add one-line brief description here ]]
+ **
+ ** [[ Add lengthier description here ]]
+ ** \todo document this file
+ **/
+
+/*
+ * sha1smt.cpp
+ *
+ *  Created on: Jul 13, 2012
+ *      Author: dejan
+ */
+
+#include <string>
+#include <fstream>
+#include <iostream>
+#include <sstream>
+
+#include "word.h"
+#include "sha1.hpp"
+#include "expr/command.h"
+
+#include <boost/uuid/sha1.hpp>
+
+using namespace std;
+using namespace CVC4;
+
+hashsmt::cvc4_uchar8 *createInput(unsigned size, std::string prefix, std::ostream& output) {
+  hashsmt::cvc4_uchar8 *input = new hashsmt::cvc4_uchar8[size];
+  for(unsigned i = 0; i < size; ++i) {
+    stringstream ss;
+    ss << prefix << i;
+    input[i] = hashsmt::cvc4_uchar8(ss.str());
+    output << DeclareFunctionCommand(ss.str(), input[i].getExpr(), input[i].getExpr().getType()) << endl;
+  }
+  return input;
+}
+
+int main(int argc, char* argv[]) {
+
+  try {
+
+    // Check the arguments
+    if (argc != 4) {
+      cerr << "usage: sha1smt size rounds (1..80) output-file" << std::endl;
+      return 1;
+    }
+
+    // Get the input size to encode
+    unsigned msgSize;
+    istringstream msgSize_is(argv[1]);
+    msgSize_is >> msgSize;
+
+    // Get the number of rounds to use
+    unsigned rounds;
+    istringstream rounds_is(argv[2]);
+    rounds_is >> rounds;
+
+    // The output
+    ofstream output(argv[3]);
+    output << expr::ExprSetDepth(-1) << expr::ExprSetLanguage(language::output::LANG_SMTLIB_V2);
+    output << SetBenchmarkLogicCommand("QF_BV") << endl;
+    output << SetBenchmarkStatusCommand(SMT_UNSATISFIABLE) << endl;
+
+    // Make the variables the size of the string
+    hashsmt::cvc4_uchar8 *cvc4input1 = createInput(msgSize, "x", output);
+    hashsmt::cvc4_uchar8 *cvc4input2 = createInput(msgSize, "y", output);
+
+    // Do the cvc4 encoding for first message
+    hashsmt::sha1 cvc4encoder1(rounds);
+    cvc4encoder1.process_bytes(cvc4input1, msgSize);
+    hashsmt::cvc4_uint32 cvc4digest1[5];
+    cvc4encoder1.get_digest(cvc4digest1);
+
+    // Do the cvc4 encoding for second message
+    hashsmt::sha1 cvc4encoder2(rounds);
+    cvc4encoder2.process_bytes(cvc4input2, msgSize);
+    hashsmt::cvc4_uint32 cvc4digest2[5];
+    cvc4encoder2.get_digest(cvc4digest2);
+
+    // Create the assertion
+    Expr inputEqual = (hashsmt::Word::concat(cvc4input1, msgSize) == hashsmt::Word::concat(cvc4input2, msgSize));
+    Expr digestEqual = (hashsmt::Word::concat(cvc4digest1, 5) == hashsmt::Word::concat(cvc4digest2, 5));
+    Expr assertion = inputEqual.notExpr().andExpr(digestEqual);
+
+    output << AssertCommand(assertion) << endl;
+
+    // Checksat command
+    output << CheckSatCommand() << endl;
+
+  } catch (CVC4::Exception& e) {
+    cerr << e << endl;
+  }
+}
+
+
+