initial sls experiment

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
test for SLS

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
test for SLS

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
working on SLS

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
working on SLS

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>