Rename current_count method to latest_index

current_count could sound related to count which has a different meaning
from what this method returns.

Author: romainbrenguier

src/goto-symex/goto_symex_state.cpp

@@ -437,7 +437,7 @@ bool goto_symex_statet::l2_thread_read_encoding(
     if(a_s_read.second.empty())
     {
       increase_generation(l1_identifier, ssa_l1);
-      a_s_read.first=level2.current_count(l1_identifier);
+      a_s_read.first = level2.latest_index(l1_identifier);
     }
     const renamedt<ssa_exprt, L2> l2_false_case = set_indices<L2>(ssa_l1, ns);
 

src/goto-symex/renaming_level.cpp

@@ -112,7 +112,7 @@ operator()(renamedt<ssa_exprt, L1> l1_expr) const
 {
   if(!l1_expr.get().get_level_2().empty())
     return renamedt<ssa_exprt, L2>{std::move(l1_expr.value())};
-  l1_expr.value().set_level_2(current_count(l1_expr.get().get_identifier()));
+  l1_expr.value().set_level_2(latest_index(l1_expr.get().get_identifier()));
   return renamedt<ssa_exprt, L2>{std::move(l1_expr.value())};
 }
 
@@ -137,7 +137,7 @@ void symex_level1t::restore_from(const symex_level1t &other)
   }
 }
 
-unsigned symex_level2t::current_count(const irep_idt &identifier) const
+unsigned symex_level2t::latest_index(const irep_idt &identifier) const
 {
   const auto r_opt = current_names.find(identifier);
   return !r_opt ? 0 : r_opt->get().second;

src/goto-symex/renaming_level.h

@@ -92,7 +92,7 @@ struct symex_level2t
   renamedt<ssa_exprt, L2> operator()(renamedt<ssa_exprt, L1> l1_expr) const;
 
   /// Counter corresponding to an identifier
-  unsigned current_count(const irep_idt &identifier) const;
+  unsigned latest_index(const irep_idt &identifier) const;
 };
 
 /// Undo all levels of renaming

src/goto-symex/symex_atomic_section.cpp

@@ -70,7 +70,7 @@ void goto_symext::symex_atomic_end(statet &state)
   for(const auto &pair : state.written_in_atomic_section)
   {
     ssa_exprt w = pair.first;
-    w.set_level_2(state.get_level2().current_count(w.get_identifier()));
+    w.set_level_2(state.get_level2().latest_index(w.get_identifier()));
 
     // guard is the disjunction over writes
     PRECONDITION(!pair.second.empty());