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procedure {:checksum "0"} M(x: int);
implementation {:id "M"} {:checksum "1"} M(x: int)
{ assert x < 20 || 10 <= x; // always true
assert x < 10; // error
call Other(x); // error: precondition violation
}
procedure {:checksum "10"} Other(y: int);
requires 0 <= y;
implementation {:id "Other"} {:checksum "11"} Other(y: int)
{
}
procedure {:checksum "20"} Posty() returns (z: int);
ensures 2 <= z; // error: postcondition violation
implementation {:id "Posty"} {:checksum "21"} Posty() returns (z: int)
{
var t: int;
t := 20;
if (t < z) {
} else { // the postcondition violation occurs on this 'else' branch
}
}
procedure {:checksum "30"} NoChangeWhazzoeva(u: int);
implementation {:id "NoChangeWhazzoeva"} {:checksum "3"} NoChangeWhazzoeva(u: int)
{
assert u != 53; // error
}
procedure {:checksum "40"} NoChangeAndCorrect();
implementation {:id "NoChangeAndCorrect"} {:checksum "41"} NoChangeAndCorrect()
{
assert true;
}
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