added support for array_copy in the full-slice option

Do not slice away array_copy expressions during the implicit call
in the full-slicert class. We do not process array_copy in value_set_fit.

Author: lucasccordeiro

src/goto-instrument/full_slicer.cpp

@@ -337,6 +337,10 @@ static bool implicit(goto_programt::const_targett target)
 {
   // some variables are used during symbolic execution only
 
+  const irep_idt &statement=target->code.get_statement();
+  if(statement==ID_array_copy)
+    return true;
+
   if(!target->is_assign())
     return false;
 

src/pointer-analysis/value_set_fi.cpp

@@ -1729,6 +1729,9 @@ void value_set_fit::apply_code(
   else if(statement==ID_fence)
   {
   }
+  else if(statement==ID_array_copy)
+  {
+  }
   else if(statement==ID_input || statement==ID_output)
   {
     // doesn't do anything