About

UCLID5 is an integrated modeling, verification and synthesis tool. UCLID5 is an evolution of the earlier UCLID modeling and verification system. The UCLID project was one of the first to develop satisfiability modulo theories (SMT) solvers and SMT-based verification methods. Here is the original UCLID paper that appeared at CAV 2002:

Randal E. Bryant, Shuvendu K. Lahiri, and Sanjit A. Seshia. Modeling and Verifying Systems using a Logic of Counter Arithmetic with Lambda Expressions and Uninterpreted Functions. [HTML] Proceedings of the 14th International Conference on Computer-Aided Verification (CAV), pp. 78–92, LNCS 2404, July 2002.

If you use UCLID5 in your work, please cite the following papers:

Elizabeth Polgreen, Kevin Cheang, Pranav Gaddamadugu, Adwait Godbole, Kevin Laeufer, Shaokai Lin, Yatin A. Manerkar, Federico Mora, and Sanjit A. Seshia. UCLID5: Multi-Modal Formal Modeling, Verification, and Synthesis. [HTML]34th International Conference on Computer Aided Verification (CAV 2022), Haifa, Israel. July 2022.

Sanjit A. Seshia and Pramod Subramanyan. UCLID5: Integrating Modeling, Verification, Synthesis and Learning. [HTML] Proceedings of the 16th ACM-IEEE International Conference on Formal Methods and Models for System Design (MEMOCODE 2018), Beijing, China. October 2018.

For questions and feeback please contact elizabeth.polgreen [at] ed.ac.uk.

Contact us

For bug reports, first preference is for you to file a GitHub issue. For help using UCLID5 in your work, please email [email protected]

UCLID5 Tutorial/Publication

The tutorial document has a gentle introduction to using UCLID5.

A set of tutorial lectures on UCLID5 can be found here.

Versions

Get the latest release, or get the latest development version git clone https://github.com/uclid-ord/uclid.

Installation

Prerequisites:

To use the prebuilt binaries, UCLID5 requires:

• Z3 version 4.12.2 with the Java bindings
• OpenJDK version 8,9,10 or 11

To compile from source, UCLID5 requires all of the above plus:

• SBT version 1.0 or greater.

The following are optional requirements but several CI tests will fail without them:

• (optional) CVC5 version 0.0.4 is the SyGuS-IF compliant solver used for synthesis tests in the CI.
• (optional) Delphi is used for verification modulo oracles tests in the CI.

Installation of prerequisites on Linux

Java 11

• Install instructions for OpenJDK are available at https://openjdk.java.net/install/

SBT (only required to build from source)

• Install instructions for SBT are available at http://www.scala-sbt.org/1.0/docs/Setup.html

External solvers

• For easy install of prerequisite solvers on Linux, run the following scripts from the root directory of the UCLID5 source repository. These scripts set up Z3/CVC5/Delphi for use with uclid5. This script will download Z3 version 4.12.2./CVC5 1.0.3/Delphi binaries from GitHub.

    $ source get-z3-linux.sh
    $ source get-cvc5-linux.sh #(optional but some CI synthesis tests will fail without CVC5)
    $ source get-delphi-linux.sh #(optional but some CI synthesis tests will fail without Delphi)

• These scripts download the binaries for Z3, CVC5 and Delphi respectively and set up your PATH and LD_LIBRARY_PATH accordingly. You may wish to permanently add the following lines to your bash_profile:

    export PATH=$PATH:/path/to/uclid/z3/bin:/path/to/uclid/cvc5/bin:/path/to/uclid/delphi/bin:/path/to/uclid/oracles
    export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/path/to/uclid/z3/bin

Alternatively, Z3, CVC5, and Delphi can all be built from source, and instructions can be found on their respective git repositories. If you prefer to build Z3 from source, make sure the Z3/Java interface is enabled in your build (currently by passing --java to the mk_make.py script).

Installation of prerequisites on Mac

Java 11

We recommend using openJDK 11 on MacOS, and provide instructions for installing this with homebrew (further instructions are available at https://openjdk.org/install/):

1. brew install openjdk@11

If the above step does not work and you are running an old version of macOS, try:

1. brew update
2. brew tap homebrew/cask-versions
3. brew cask install java11

Make sure Java 11 is the default by adding the following lines to your dotfiles. For bash this is usually .bash_profile and for zsh this is usually .zshrc.

export JAVA_11_HOME=$(/usr/libexec/java_home -v11)
alias java11='export JAVA_HOME=$JAVA_11_HOME'
java11

SBT (only required to build from source)

• brew install sbt

External solvers

• For easy install of prerequisites on macOS, run the following scripts from the root directory of the UCLID5 source repository. These scripts set up Z3/CVC5/Delphi for use with uclid5. This script will download Z3 version 4.12.2./CVC5 1.0.3/Delphi binaries from GitHub.

    $ source get-z3-macos.sh
    $ source get-cvc5-macos.sh #(optional but some CI synthesis tests will fail without CVC5)
    $ source get-delphi-macos.sh #(optional but some CI synthesis tests will fail without Delphi)

• These scripts add the downloaded binaries to your PATH and LD_LIBRARY_PATH accordingly. You may wish to permanently add the following lines to your bash_profile:

    export PATH=$PATH:/path/to/uclid/z3/bin:/path/to/uclid/cvc5/bin:/path/to/uclid/delphi/bin:/path/to/uclid/oracles

• Due to System Integrity Protection, introduced in OS X El Capitan, Java ignores the user set DYLD_LIBRARY_PATH. Depending on the version of MacOS you are using, you may need to fix this issue by copying the JNI dynamic link libraries to Java/Library/Extensions and the non-JNI dynamic link libraries to /usr/local/lib as follows (if you build Z3 from source these files are found in the build directory):

    cp /path/to/uclid/z3/bin/libz3.dylib /usr/local/lib
    cp /path/to/uclid/z3/bin/libz3java.dylib /Library/Java/Extensions

Using the Pre-built binaries

Get the latest release. The uclid binary is located in the bin/ subdirectory

Compiling uclid5 from source

Run the following command in the root directory of the UCLID5 repository (note that it is not necessary to run sbt update if you already have the correct dependencies installed as per https://github.com/uclid-org/uclid/blob/master/build.sbt. However, running it will do no harm.):

$ sbt update clean compile "set fork:=true" test

If compilation and tests pass (or if the only failing tests are due to CVC5 and Delphi not being found), you can build a universal package.

$ sbt universal:packageBin

This will create uclid/target/universal/uclid-0.9.5.zip, which contains the uclid binary in the bin/ subdirectory. Unzip this file, and add it to your path.

$ unzip uclid-0.9.5.zip
$ cd uclid-0.9.5
$ export PATH=$PATH:$PWD/bin

Running UCLID

Now you can run uclid using the 'uclid' command. For example:

$ uclid examples/tutorial/ex1.1-fib-model.ucl

Some useful commands to know:

• To print the SMT files use the -g flag, e.g., uclid examples/tutorial/ex1.1-fib-model.ucl -g "filename" will print the SMT file to SMT files with the prefix filename.
• To run UCLID5 with another solver use the -s flag, e.g., uclid examples/tutorial/ex1.1-fib-model.ucl -s "cvc5 --lang smt2 --produce-models" will use CVC5 as the back-end solver.

Directory Structure

This repository consists of the following sub-directories.

• examples : This contains example uclid5 models. See examples/tutorial for the examples from the tutorial.
• lib: Libraries on which uclid5 depends (Z3).
• project: Build scripts.
• src/main/scala: uclid5 source.
• src/test/scala: uclid5 test suite.
• test: test programs for uclid5.
• tutorial: uclid5 tutorial (with LaTeX source)
• vim: vim syntax highlighting for uclid5.

Related Tools

• chiselucl allows Chisel models to be converted into UCLID5.