Processing command (at Snapshots1.v0.dfy(3,4)) assert (forall<alpha> $o: ref, $f: Field alpha :: false ==> $_Frame[$o, $f]);
  >>> DoNothingToAssert
Processing command (at Snapshots1.v0.dfy(4,10)) assert false;
  >>> DoNothingToAssert
Processing command (at Snapshots1.v0.dfy(12,3)) assert true;
  >>> DoNothingToAssert

Dafny program verifier finished with 4 verified, 0 errors
Processing call to procedure IntraModuleCall$$_module.__default.N in implementation Impl$$_module.__default.M (at Snapshots1.v1.dfy(3,4)):
  >>> added after: a##cached##0 := a##cached##0 && false;
Processing command (at Snapshots1.v1.dfy(12,3)) assert true;
  >>> MarkAsFullyVerified
Processing command (at Snapshots1.v1.dfy(3,4)) assert (forall<alpha> $o: ref, $f: Field alpha :: false ==> $_Frame[$o, $f]);
  >>> MarkAsFullyVerified
Processing command (at Snapshots1.v1.dfy(4,10)) assert false;
  >>> DoNothingToAssert
Snapshots1.v1.dfy(4,9): Error: assertion violation
Execution trace:
    (0,0): anon0

Dafny program verifier finished with 3 verified, 1 error