function {:existential true} {:inline} b1() : bool
{
  false
}
function {:existential true} {:inline} b2() : bool
{
  false
}
function {:existential true} {:inline} b3() : bool
{
  false
}
function {:existential true} {:inline} b4() : bool
{
  false
}

Boogie program verifier finished with 1 verified, 0 errors