Simba(Synthesis from Inductive specification eMpowered by Bidirectional Abstract interpretation) is an inductive program synthesizer using forward and backward abstract interpretation for pruning search spaces.

Research paper: at ACM DL

Research artifact: Zenodo and Github

• Xcode Command Line Tools and Homebrew

If you want to build and run this tool on macOS, you should install these tools first.

• opam(https://opam.ocaml.org/): for ocaml compiler

$ sudo apt-get install -y opam  # for linux
$ brew install opam  # for mac
$
$ opam init --auto-setup --disable-sandboxing --yes

• libgmp-dev(https://gmplib.org/): for z3 solver

$ sudo apt-get install -y libgmp-dev # for linux
$ brew install gmp # for mac

0. TL;DR, do it in one-line commannd

$ ./first_build.sh

1. Make proper ocaml environment and get dependency packages

opam switch create simba 4.12.0
opam switch simba 
opam install --yes dune merlin ocaml-lsp-server dune-build-info batteries ocamlgraph core_kernel yojson z3

• dune : build system
• dune-build_info : insert version information(commit id) to binary
• merlin : IntelliSense system
• ocaml-lsp-server: for merlin in visual studio code
• batteries : extended standard libraries
• ocamlgraph : ordering grammar rules
• core-kernel : sexp utilities
• yojson : report by json format
• z3 : SMT solver

2. Build by dune

dune build
dune install --prefix=_install

The compiled executable file can be found at _install/bin/simba. Since the executable is self-contained, it can be easily moved or copied to any location for your convenience and executed.

Just run the executable with target sl file.

$ ./simba.exe <options> [a SyGuS input file]

You may find the options available by:

$ ./simba.exe -help

For example, to solve the problem described in testcases/bitvec/hd/hd-17-d5-prog.sl,

$ simba/simba.exe testcases/bitvec/hd/hd-17-d5-prog.sl

You will get the following output:

(define-fun f ( (x (BitVec 64))) (BitVec 64) (bvand (bvneg (bvand (bvnot x) (bvneg x))) x))
****************** statistics *******************
size : 8
time : 1.24 sec
final max component size : 6
final component pool size : 4617
**************************************************

The first line shows a desirable solution (f is the target synthesis function), and the other lines show some useful statistics.

For more detailed progress log and statistics, use option -log as follows:

$ simba/simba.exe -log stdout bench/bitvec/hd/hd-17-d5-prog.sl
$ simba/simba.exe -log solving-hd-17-d5.log bench/bitvec/hd/hd-17-d5-prog.sl