Processing command (at Snapshots8.v0.dfy(2,37)) assert x#0 < 20 || LitInt(10) <= x#0;
  >>> DoNothingToAssert
Processing command (at Snapshots8.v0.dfy(3,12)) assert x#0 < 10;
  >>> DoNothingToAssert
Processing command (at Snapshots8.v0.dfy(4,9)) assert true;
  >>> DoNothingToAssert
Processing command (at Snapshots8.v0.dfy(4,8)) assert (forall<alpha> $o: ref, $f: Field alpha :: false ==> $_Frame[$o, $f]);
  >>> DoNothingToAssert
Processing command (at Snapshots8.v0.dfy(4,8)) assert LitInt(0) <= call0formal#AT#y#0;
  >>> DoNothingToAssert
Snapshots8.v0.dfy(3,11): Error: assertion violation
Snapshots8.v0.dfy(4,7): Error BP5002: A precondition for this call might not hold.
Snapshots8.v0.dfy(8,13): Related location: This is the precondition that might not hold.
Processing command (at Snapshots8.v0.dfy(15,12)) assert true;
  >>> DoNothingToAssert
Processing command (at Snapshots8.v0.dfy(13,13)) assert LitInt(2) <= z#0;
  >>> DoNothingToAssert
Snapshots8.v0.dfy(17,9): Error BP5003: A postcondition might not hold on this return path.
Snapshots8.v0.dfy(13,12): Related location: This is the postcondition that might not hold.
Processing command (at Snapshots8.v0.dfy(23,12)) assert u#0 != 53;
  >>> DoNothingToAssert
Snapshots8.v0.dfy(23,11): Error: assertion violation
Processing command (at Snapshots8.v0.dfy(28,10)) assert true;
  >>> DoNothingToAssert

Dafny program verifier finished with 7 verified, 4 errors
Processing command (at Snapshots8.v1.dfy(30,17)) assert u#0 != 53;
  >>> RecycleError
Snapshots8.v1.dfy(30,16): Error: assertion violation
Processing command (at Snapshots8.v1.dfy(3,15)) assert x#0 < 20 || LitInt(10) <= x#0;
  >>> MarkAsFullyVerified
Processing command (at Snapshots8.v1.dfy(5,17)) assert x#0 < 10;
  >>> RecycleError
Processing command (at Snapshots8.v1.dfy(6,9)) assert true;
  >>> MarkAsFullyVerified
Processing command (at Snapshots8.v1.dfy(6,8)) assert (forall<alpha> $o: ref, $f: Field alpha :: false ==> $_Frame[$o, $f]);
  >>> MarkAsFullyVerified
Processing command (at Snapshots8.v1.dfy(6,8)) assert LitInt(0) <= call0formal#AT#y#0;
  >>> RecycleError
Processing command (at Snapshots8.v1.dfy(7,12)) assert x#0 == LitInt(7);
  >>> DoNothingToAssert
Snapshots8.v1.dfy(5,16): Error: assertion violation
Snapshots8.v1.dfy(6,7): Error BP5002: A precondition for this call might not hold.
Snapshots8.v1.dfy(12,20): Related location: This is the precondition that might not hold.
Snapshots8.v1.dfy(7,11): Error: assertion violation
Processing command (at Snapshots8.v1.dfy(21,12)) assert true;
  >>> MarkAsFullyVerified
Processing command (at Snapshots8.v1.dfy(23,12)) assert true;
  >>> DoNothingToAssert
Processing command (at Snapshots8.v1.dfy(19,13)) assert LitInt(2) <= z#0;
  >>> DoNothingToAssert
Snapshots8.v1.dfy(24,9): Error BP5003: A postcondition might not hold on this return path.
Snapshots8.v1.dfy(19,12): Related location: This is the postcondition that might not hold.

Dafny program verifier finished with 7 verified, 5 errors