KLab

A symbolic execution engine for EVM and explorer for K-framework reachability proofs.

**This is an early alpha version for internal usage. Direct any questions in an issue or at https://dapphub.chat/channel/k-framework .

Requirements

You will need a modified version of evm-semantics, containing a modified version of k:

• https://github.com/dapphub/evm-semantics use the klab branch

Install it with:

make deps
make

SetUp

git clone git@github.com:dapphub/kdebug.git
cd kdebug
make

Export path variables e.g. save them in ~/.profiles

export KLAB_K_PATH=/path/to/k
export KLAB_EVMS_PATH=/path/to/evm-semantics

You also need to set the temporary directory to use, for example:

export TMPDIR=/tmp

Usage

Write a spec.ini file with the property you want to prove and put it in a directory together with the solidity source code file together with the corresponding .sol.json. From the same directory, run:

klab run

to start the klab interactive tool.

Example usage