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SMT: only set produce-unsat-cores when recording hints #3714

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SMT: only set produce-unsat-cores when recording hints #3714

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8 changes: 7 additions & 1 deletion src/smtencoding/FStarC.SMTEncoding.Z3.fst
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Original file line number Diff line number Diff line change
Expand Up @@ -552,7 +552,6 @@ let z3_options (ver:string) =
"(set-option :global-decls false)";
"(set-option :smt.mbqi false)";
"(set-option :auto_config false)";
"(set-option :produce-unsat-cores true)";
"(set-option :model true)";
"(set-option :smt.case_split 3)";
"(set-option :smt.relevancy 2)";
Expand Down Expand Up @@ -614,6 +613,13 @@ let mk_input (fresh : bool) (theory : list decl) : string & option string & opti
) :: theory
in
let options = z3_options ver in
let options =
(* With --ext fast_hints, we only enable unsat-core generation
if we are actually recording hints. *)
if Options.Ext.enabled "fast_hints" && not (Options.record_hints ())
then options
else options ^ "(set-option :produce-unsat-cores true)\n"
in
let options = options ^ (Options.z3_smtopt() |> String.concat "\n") ^ "\n\n" in
if Options.print_z3_statistics() then context_profile theory;
let r, hash =
Expand Down
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