*** MODEL
%lbl%@47 -> false
%lbl%+24 -> true
%lbl%+37 -> true
null -> T@ref!val!0
s -> T@ref!val!0
tickleBool -> {
  true -> true
  false -> true
  else -> true
}
*** END_MODEL
NullInModel.bpl(4,3): Error BP5001: This assertion might not hold.
Execution trace:
    NullInModel.bpl(4,3): anon0

Boogie program verifier finished with 0 verified, 1 error