Test/og/parallel2.bpl


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36

var a:[int]int;

procedure {:entrypoint} main() 
{
    var {:linear "tid"} i: int;
    var {:linear "tid"} j: int;
    call i := t(i) | j := t(j);
    call i := u(i) | j := u(j);
}

procedure t({:linear "tid"} i': int) returns ({:linear "tid"} i: int)
{
    assume i == i';

    a[i] := 42;
    call i := Yield(i);
    assert a[i] == 42;
}

procedure u({:linear "tid"} i': int) returns ({:linear "tid"} i: int) 
{
    assume i == i';

    a[i] := 42;
    yield;
    assert a[i] == 42;
}

procedure Yield({:linear "tid"} i': int) returns ({:linear "tid"} i: int)
ensures i == i';
ensures old(a)[i] == a[i];
{
    assume i == i';
    yield;
    assert old(a)[i] == a[i];
}