Modules1.dfy(79,15): Error: assertion violation Execution trace: (0,0): anon0 (0,0): anon3_Then Modules1.dfy(92,15): Error: assertion violation Execution trace: (0,0): anon0 (0,0): anon3_Then Modules1.dfy(94,17): Error: assertion violation Execution trace: (0,0): anon0 (0,0): anon3_Else Modules1.dfy(56,8): Error: decreases expression must be bounded below by 0 Modules1.dfy(54,12): Related location Execution trace: (0,0): anon0 Modules1.dfy(62,8): Error: failure to decrease termination measure Execution trace: (0,0): anon0 Dafny program verifier finished with 26 verified, 5 errors