# output nondeterministic.
resource imp1
	type t = rec(int a,b)
	op f(t x) {call,send}
body imp1(int a, int c, int d, bool b)
	write("imp1 initial",a,b,c,d)

	proc f(x)  {
		write("imp1 f",x.a,x.b)
	}
end