Terminating test with nested functions

src/main/scala/leon/termination/StructuralSize.scala

@@ -78,8 +78,10 @@ trait StructuralSize {
       }).foldLeft[Expr](InfiniteIntegerLiteral(0))(Plus)
       case IntegerType =>
         FunctionInvocation(typedAbsBigIntFun, Seq(expr)) 
+/*
       case Int32Type =>
         FunctionInvocation(typedAbsIntFun, Seq(expr))
+*/
       case _ => InfiniteIntegerLiteral(0)
     }
   }

src/test/resources/regression/verification/purescala/valid/Nested16.scala

+/* Copyright 2009-2016 EPFL, Lausanne */
+
+object Nested16 {
+
+  def foo(i: BigInt): BigInt = {
+    def rec1(j: BigInt): BigInt = {
+      require(j >= 0)
+      def rec2(k: BigInt): BigInt = {
+        require(j > 0 || j == k)
+        if(k == 0) 0 else rec1(j-1)
+      }
+      rec2(j)
+    }
+    rec1(3)
+  } ensuring(0 == _)
+
+}