Twostate-Verification.dfy(37,26): Error: receiver must be allocated in the state in which its fields are accessed
Execution trace:
    (0,0): anon0
Twostate-Verification.dfy(41,32): Error: receiver argument must be allocated in the state in which the function is invoked
Execution trace:
    (0,0): anon0
Twostate-Verification.dfy(56,26): Error: receiver must be allocated in the state in which its fields are accessed
Execution trace:
    (0,0): anon0
    (0,0): anon3_Then
Twostate-Verification.dfy(58,32): Error: receiver argument must be allocated in the state in which the function is invoked
Execution trace:
    (0,0): anon0
    (0,0): anon3_Else
Twostate-Verification.dfy(74,15): Error: assertion violation
Execution trace:
    (0,0): anon0
Twostate-Verification.dfy(6,4): Error: parameter 0 ('c') must be allocated in the two-state lemma's previous state
Execution trace:
    (0,0): anon0
Twostate-Verification.dfy(12,17): Error: receiver must be allocated in the state in which its fields are accessed
Execution trace:
    (0,0): anon0

Dafny program verifier finished with 31 verified, 7 errors
