TBD
+Until I find the time to write this section this links must be sufficient:
+
+ * Yosys: http://www.clifford.at/yosys/
+ * SymbiYosys: https://github.com/cliffordwolf/SymbiYosys
+ * Z3: https://github.com/Z3Prover/z3
+ * Yices2: http://yices.csl.sri.com/
+ * Boolector: http://fmv.jku.at/boolector/
+ * super_prove: http://downloads.bvsrc.org/super_prove/
+
+(Yosys, SymbiYosys, and Z3 are non-optional. The other packages are only
+required for some engine configurations.)
+
First step: A simple BMC example
--------------------------------
such as a copy of the design source, various log files, and trace data in case
the proof fails.
-(Use ``sby -f demo.sby`` to re-run the prove. Without ``-f`` the command will
+(Use ``sby -f demo.sby`` to re-run the proof. Without ``-f`` the command will
fail because the output directory ``demo/`` already exists.)
Time for a simple exercise: Modify the design so that the property is false