add constant folding and verification pass for pim host operations

better validation scripts output
big refactors

src/PIM/PimAccelerator.hpp

@@ -18,8 +18,6 @@ public:
   PimAccelerator(PimAccelerator&) = delete;
   void operator=(const PimAccelerator&) = delete;
 
-  ~PimAccelerator();
-
   /// Creates an instance on the first invocation. Subsequent invocations
   /// return the existing instance.
   static PimAccelerator* getInstance();