- /*@modifies *s1@*/ /*@bufferConstraint MaxSet(s1) >= ( n - 1
-); MaxRead (s2) >= ( n - 1 ); @*/ /*@ensuresConstraint MaxRead (s1) ==
-MaxRead (s2); MaxRead (s1) <= n; @*/;
+ /*@modifies *s1@*/ /*@requires MaxSet(s1) >= ( n - 1) /\ MaxRead (s2) >= ( n - 1 ); @*/ /*@ensures MaxRead (s1) ==
+MaxRead (s2) /\ MaxRead (s1) <= n; @*/;