FileItem_false
FileItem, incorrect version
function getFileName(self: Ref) : Ref
function sectorCode(self: Ref) : Int
function industryCode(self: Ref) : Int
define return(x) {
assert !returned
returned := true
res := x
}
function sgn(i: Int) : Int
ensures i > 0 ==> result == 1
ensures i == 0 ==> result == 0
ensures i < 0 ==> result == -1
method FileItem_compare(o1: Ref, o2: Ref) returns (res: Int)
ensures (rel(o1, 0) == rel(o2, 1) && rel(o2, 0) == rel(o1, 1)) ==> (sgn(rel(res, 0)) == -sgn(rel(res, 1))) // P1
method String_compare(o1: Ref, o2: Ref) returns (res: Int)
ensures (rel(o1, 0) == rel(o2, 1) && rel(o2, 0) == rel(o1, 1)) ==> (sgn(rel(res, 0)) == -sgn(rel(res, 1))) // P1
method compare(o1: Ref, o2: Ref) returns (res: Int)
requires rel(o1, 0) == rel(o2, 1) && rel(o2, 0) == rel(o1, 1)
ensures (sgn(rel(res, 0)) == -sgn(rel(res, 1))) // P1
{
var returned : Bool
returned := false
var restmp : Int := 0
if ((o1 != null) && (o2 != null)) {
var n1 : Ref
n1 := getFileName(o1)
var n2 : Ref
n2 := getFileName(o2);
if ((n1 != null) && (n2 != null)) {
restmp := String_compare(n1, n2);
}
}
return(restmp)
assert returned
}