src/HOL/Tools/SMT/smt_failure.ML
author boehmes
Mon, 08 Nov 2010 12:13:44 +0100
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(*  Title:      HOL/Tools/SMT/smt_failure.ML
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    Author:     Sascha Boehme, TU Muenchen
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Failures and exception of SMT.
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*)
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signature SMT_FAILURE =
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sig
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  datatype failure =
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    Counterexample of bool * term list |
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    Time_Out |
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    Out_Of_Memory |
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    Other_Failure of string
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  val string_of_failure: Proof.context -> failure -> string
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  exception SMT of failure
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end
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structure SMT_Failure: SMT_FAILURE =
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struct
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datatype failure =
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  Counterexample of bool * term list |
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  Time_Out |
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  Out_Of_Memory |
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  Other_Failure of string
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fun string_of_failure ctxt (Counterexample (real, ex)) =
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      let
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        val msg = (if real then "C" else "Potential c") ^ "ounterexample found"
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      in
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        if null ex then msg
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        else Pretty.string_of (Pretty.big_list (msg ^ ":")
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          (map (Syntax.pretty_term ctxt) ex))
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      end
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  | string_of_failure _ Time_Out = "Timed out"
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  | string_of_failure _ Out_Of_Memory = "Ran out of memory"
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  | string_of_failure _ (Other_Failure msg) = msg
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exception SMT of failure
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end