Revert "output the iteration number in XML"

This reverts commit bacb22f.

Author: tautschnig

src/solvers/refinement/bv_refinement_loop.cpp

@@ -8,10 +8,6 @@ Author: Daniel Kroening, [email protected]
 
 #include "bv_refinement.h"
 
-#include <iostream>
-
-#include <util/xml.h>
-
 bv_refinementt::bv_refinementt(const infot &info):
   bv_pointerst(*info.ns, *info.prop),
   progress(false),
@@ -40,14 +36,6 @@ decision_proceduret::resultt bv_refinementt::dec_solve()
 
     status() << "BV-Refinement: iteration " << iteration << eom;
 
-    // output the very same information in a structured fashion
-    if(config_.ui==ui_message_handlert::uit::XML_UI)
-    {
-      xmlt xml("refinement-iteration");
-      xml.data=std::to_string(iteration);
-      status() << xml << '\n';
-    }
-
     switch(prop_solve())
     {
     case resultt::D_SATISFIABLE:

src/solvers/refinement/string_refinement_util.h

@@ -9,6 +9,8 @@
 #ifndef CPROVER_SOLVERS_REFINEMENT_STRING_REFINEMENT_UTIL_H
 #define CPROVER_SOLVERS_REFINEMENT_STRING_REFINEMENT_UTIL_H
 
+#include <memory>
+
 #include "string_builtin_function.h"
 #include "string_constraint.h"
 #include "string_constraint_generator.h"