Bitwuzla

Bitwuzla is a Satisfiability Modulo Theories (SMT) solvers for the theories of fixed-size bit-vectors, floating-point arithmetic, arrays, uninterpreted functions and their combinations.

If you are using Bitwuzla in your work, or if you incorporate it into software of your own, we invite you to send us a description and link to your project/software, so that we can link it as third party application on bitwuzla.github.io.

Website

More information about Bitwuzla is available at: https://bitwuzla.github.io

Download

The latest version of Bitwuzla is available on GitHub: https://github.com/bitwuzla/bitwuzla

Required Dependencies

CMake >= 3.7
GMP v6.1 (GNU Multi-Precision arithmetic library)
Btor2Tools
SymFPU
At least one of the supported SAT solvers, see below.

Note: If you don't want to install Btor2Tools or SymFPU system-wide, use scripts setup-btor2tools.sh and setup-symfpu.sh in the contrib directory to build and set up.

Optional Dependencies

Bitwuzla can be built with support for the following SAT solvers:

To build and set up any of these SAT solvers, use scripts setup-{cadical, cms, kissat, lingeling, minisat, picosat}.sh in the contrib directory.

Note: Bitwuzla can be built with support for multiple SAT solvers.

Build

Bitwuzla can be built on Linux, macOS and Windows.

Linux and Unix-like OS

Assume that we build Bitwuzla with CaDiCaL:

# Download and build Bitwuzla
git clone https://github.com/bitwuzla/bitwuzla
cd bitwuzla

# Download and build CaDiCaL
./contrib/setup-cadical.sh

# Download and build BTOR2Tools
./contrib/setup-btor2tools.sh

# Download and build SymFPU
./contrib/setup-symfpu.sh

# Build Bitwuzla
./configure.sh && cd build && make

All binaries (bitwuzla, unit tests) are created in directory bitwuzla/build/bin, and all libraries (libbitwuzla.a, libbitwuzla.so) are created in directory bitwuzla/build/lib.

For more build configuration options of Bitwuzla, see configure.sh -h.

Building Bitwuzla with Python Bindings

To build Bitwuzla with Python bindings you need to install Cython.

Additionally, Btor2Tools and SAT solvers must be compiled with flag -fPIC (see build instructions of these tools for more details on how to build as shared library). The provided contrib/setup-\*.sh scripts automatically compile all dependencies with -fPIC. Then, from Bitwuzla's root directory, configure and build Bitwuzla as follows:

./configure.sh --python
cd build
make

Building the API documentation

To build the API documentation of Bitwuzla, it is required to install

Then build Bitwuzla, configure with option --docs and generate the documentation as follows:

cd build
make docs

The documentation is generated into build/docs/sphinx.

Note: Make sure to build Bitwuzla with Python bindings, else the documentation of its Python API will not be included.

Windows

For instructions on how to build Bitwuzla on Windows, see here.

Linking against Bitwuzla in CMake projects

Bitwuzla's build system provides a CMake package configuration, which can be used by the find_package() command to provide information about Bitwuzla's include directories, libraries and it's dependencies.

After installing Bitwuzla you can issue the following commands in your CMake project to link against Bitwuzla.

find_package(Bitwuzla)
target_link_libraries(<your_target> Bitwuzla::bitwuzla)

Contributing

Bitwuzla is distributed under the MIT license (see COPYING file). By submitting a contribution you automatically accept the conditions described in COPYING. Additionally, we ask you to certify that you have the right to submit such contributions. To manage this process we use a mechanism known as Developer Certificate of Origin, which can be acknowledged by signing-off your commits with git commit -s. We require all pull requests to be squashed into a single commit and signed-off.

Developer Certificate of Origin
Version 1.1

Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
1 Letterman Drive
Suite D4700
San Francisco, CA, 94129

Everyone is permitted to copy and distribute verbatim copies of this
license document, but changing it is not allowed.


Developer's Certificate of Origin 1.1

By making a contribution to this project, I certify that:

(a) The contribution was created in whole or in part by me and I
    have the right to submit it under the open source license
    indicated in the file; or

(b) The contribution is based upon previous work that, to the best
    of my knowledge, is covered under an appropriate open source
    license and I have the right under that license to submit that
    work with modifications, whether created in whole or in part
    by me, under the same open source license (unless I am
    permitted to submit under a different license), as indicated
    in the file; or

(c) The contribution was provided directly to me by some other
    person who certified (a), (b) or (c) and I have not modified
    it.

(d) I understand and agree that this project and the contribution
    are public and that a record of the contribution (including all
    personal information I submit with it, including my sign-off) is
    maintained indefinitely and may be redistributed consistent with
    this project or the open source license(s) involved.

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