Check results of (check-sat) in yosys-smtbmc

Signed-off-by: Clifford Wolf <clifford@clifford.at>

diff --git a/backends/smt2/smtio.py b/backends/smt2/smtio.py
index f61f3e77ed6335051e635631eda8aaa67bc10e2a..fed4524ce034fb632d13c60fa12d091ba63fbb06 100644 (file)
--- a/backends/smt2/smtio.py
+++ b/backends/smt2/smtio.py
@@ -646,6 +646,8 @@ class SmtIo:
                     sys.stderr.flush()
 
         result = self.read()
+        assert result in ["sat", "unsat"]
+
         if self.debug_file:
             print("(set-info :status %s)" % result, file=self.debug_file)
             print("(check-sat)", file=self.debug_file)