Match_false
Match, incorrect version
function score(self: Ref) : Int
function seq1start(self: Ref) : Int
function seq2start(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 compare(o1: Ref, o2: Ref) returns (res: Int)
requires rel(o1, 0) == rel(o1, 1) && rel(o2, 0) == rel(o1, 2) && rel(o2, 2) == rel(o2, 1)
ensures (rel(res, 0) == 0) ==> (sgn(rel(res, 1)) == sgn(rel(res, 2))) // P3
{
var returned : Bool
returned := false
if(score(o1) > score(o2)) {
return(-1)
}else{
if((score(o1) == score(o2)) && ((seq1start(o1) < seq1start(o2)) && (seq2start(o1) < seq2start(o2)))) {
return(-1)
}else{
if((score(o1) == score(o2)) && !((seq1start(o1) < seq1start(o2)) && (seq2start(o1) < seq2start(o2)))){
return(0)
}else{
return(1)
}
}
}
assert returned
}