Update README.md

Author: norhh

Diff for: README.md

@@ -51,6 +51,7 @@ $ myth analyze -a <contract-address>
 Specify the maximum number of transaction to explore with `-t <number>`. You can also set a timeout with `--execution-timeout <seconds>`. Example ([source code](https://gist.github.com/b-mueller/2b251297ce88aa7628680f50f177a81a#file-killbilly-sol)):
 
 ```
+> myth a killbilly.sol -t 3
 ==== Unprotected Selfdestruct ====
 SWC ID: 106
 Severity: High