SAL is open source, under the GNU General Public License (GPL). Informally, this means you can get the sources, and do whatever you want with them, except distribute them with software that is not available under a GPL-compatible license. SAL uses a dual license model; if you are interested in alternative licensing terms contact us at email@example.com.
There are two sets of SAL binaries, depending on whether Yices is included. Selecting a SAL distribution with Yices includes requires acceptance of the Yices "click-through" license. Alternatively, you can get a SAL distribution that does not include Yices. If you wish so, it is always possible to download Yices separately at http://yices.csl.sri.com and it will work with any of the binaries.
SAL 3.3 includes SALenv 3.0 (symbolic, bounded, and infinite-bounded
model checkers, and related tools), and, optionally, Yices.
See the included README file for build instructions.
NOTE: SAL 3.3 does not compile with the latest version of bigloo. It is known to compile with bigloo3.4a (which can be downloaded here).