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var a:[int]int;
procedure Allocate() returns ({:linear "tid"} xls: int);
function {:builtin "MapConst"} MapConstBool(bool) : [int]bool;
function {:inline} {:linear "tid"} TidCollector(x: int) : [int]bool
{
MapConstBool(false)[x := true]
}
procedure {:entrypoint} {:yields} main()
{
var {:linear "tid"} i: int;
var {:linear "tid"} j: int;
call i := Allocate();
call j := Allocate();
par i := t(i) | j := Yield(j);
par i := u(i) | j := u(j);
}
procedure {:yields} {:stable} t({:linear "tid"} i': int) returns ({:linear "tid"} i: int)
{
i := i';
a[i] := 42;
call i := Yield(i);
assert a[i] == 42;
}
procedure {:yields} {:stable} u({:linear "tid"} i': int) returns ({:linear "tid"} i: int)
{
i := i';
a[i] := 42;
yield;
assert a[i] == 42;
}
procedure {:yields} {:stable} Yield({:linear "tid"} i': int) returns ({:linear "tid"} i: int)
ensures i == i';
ensures old(a)[i] == a[i];
{
i := i';
yield;
assert old(a)[i] == a[i];
}
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