DecreasesTo3.dfy(5,32): Error: assertion might not hold
 Asserted expression: 1 decreases to 0 && 0 decreases to 1
DecreasesTo3.dfy(9,9): Error: assertion might not hold
 Asserted expression: 0 decreases to 1

Dafny program verifier finished with 0 verified, 2 errors
