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simplify how graphml error witnesses are built #2824

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kroening
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This might make the witnesses more robust, and will also enable removing lhs_object and lhs_object_value from our traces.

if(!it->lhs_object_value.is_constant() ||
!it->lhs_object_value.has_operands() ||
!has_prefix(id2string(it->lhs_object_value.op0().get(ID_value)),
"INVALID-"))
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This sanity check is now missing.

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Yes, but we haven't been generating these INVALID-OBJECTS for quite a while.

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I trust this is true, but what change was it that made those go away?

@tautschnig tautschnig assigned kroening and unassigned tautschnig Sep 3, 2018
@kroening kroening closed this Sep 5, 2018
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