Squashed commit of the following:

commit 5f4ee54b
Author: Mathias Preiner <mathias.preiner@gmail.com>
Date:   Tue May 15 19:44:52 2018 -0700

    Update status of unknown check-sat calls.
3 jobs for develop-2019
Status Name Job ID Coverage
  Build
failed build #103

 
  Test
skipped code_quality #105
allowed to fail
skipped test #104
 
Name Stage Failure
failed
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