trait-decreases.dfy(11,2): Error: method's (possibly automatically generated) decreases clause must be below or equal to that in the trait
 Asserted expression: x, y nonincreases to y, x
trait-decreases.dfy(13,2): Error: method's (possibly automatically generated) decreases clause must be below or equal to that in the trait
 Asserted expression: y, x nonincreases to y
trait-decreases.dfy(15,2): Error: method's (possibly automatically generated) decreases clause must be below or equal to that in the trait
 Asserted expression: false, x nonincreases to y, x

Dafny program verifier finished with 0 verified, 3 errors
