revealInExpression.dfy(18,10): Error: assertion might not hold
revealInExpression.dfy(20,20): Error: assertion might not hold
revealInExpression.dfy(22,20): Error: assertion might not hold
revealInExpression.dfy(24,20): Error: assertion might not hold
revealInExpression.dfy(35,14): Error: assertion might not hold
revealInExpression.dfy(37,10): Error: assertion might not hold

Dafny program verifier finished with 12 verified, 6 errors
