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// RUN: %boogie -noinfer %s > %t
// RUN: %diff %s.expect %t
procedure Bar() returns (barresult: ref);
procedure Foo();
implementation Foo()
{
var x: ref;
entry:
call x := Bar();
assume x == null;
call x := Bar();
assert x == null;
return;
}
procedure DifferentFormalNames(x: int, y: int) returns (z: int);
requires x < y;
ensures z == x;
implementation DifferentFormalNames(x: int, y: int) returns (z: int)
{
start:
assert x < y;
z := x;
return;
}
implementation DifferentFormalNames(y: int, x: int) returns (w: int)
{
start:
goto A, B;
A:
assert y < x;
assume false;
return;
B:
w := y;
return;
}
implementation DifferentFormalNames(y: int, x: int) returns (w: int)
{
start:
assert x < y; // error
w := y;
return;
}
implementation DifferentFormalNames(y: int, x: int) returns (w: int)
{
start:
w := x;
return; // error: postcondition violation
}
type ref;
const null : ref;
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