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+// RUN: %dafny /compile:0 /print:"%t.print" /dprint:"%t.dprint" "%s" > "%t"
+// RUN: %diff "%s.expect" "%t"
+
+function KeepDoin'It(x: nat): nat
+ decreases x;
+{
+ KeepDoin'It(x + 1)
+}
+
+lemma Test(r: nat)
+{
+ assert KeepDoin'It(20) == r;
+} \ No newline at end of file