UpdateExpr.bpl(16,3): Error BP5001: This assertion might not hold.
Execution trace:
    UpdateExpr.bpl(16,3): anon0
UpdateExpr.bpl(21,3): Error BP5001: This assertion might not hold.
Execution trace:
    UpdateExpr.bpl(21,3): anon0
UpdateExpr.bpl(34,3): Error BP5001: This assertion might not hold.
Execution trace:
    UpdateExpr.bpl(34,3): anon0
UpdateExpr.bpl(40,3): Error BP5001: This assertion might not hold.
Execution trace:
    UpdateExpr.bpl(40,3): anon0
UpdateExpr.bpl(54,3): Error BP5001: This assertion might not hold.
Execution trace:
    UpdateExpr.bpl(53,5): anon0

Boogie program verifier finished with 5 verified, 5 errors