emptyTrigger.dfy(6,9): Warning: Could not find a trigger for this quantifier. Without a trigger, the quantifier may cause brittle verification. To silence this warning, add an explicit trigger using the {:trigger} attribute. For more information, see the section quantifier instantiation rules in the reference manual.
emptyTrigger.dfy(6,9): Error: assertion might not hold
emptyTrigger.dfy(7,9): Error: assertion might not hold

Dafny program verifier finished with 0 verified, 2 errors
emptyTrigger.dfy(6,9): Warning: Could not find a trigger for this quantifier. Without a trigger, the quantifier may cause brittle verification. To silence this warning, add an explicit trigger using the {:trigger} attribute. For more information, see the section quantifier instantiation rules in the reference manual.
emptyTrigger.dfy(6,9): Error: assertion might not hold
emptyTrigger.dfy(7,9): Error: assertion might not hold

Dafny program verifier finished with 0 verified, 2 errors
