This project is a fork of the original bfc safety model-checker (a.k.a. breach) hosted at: original. The fork happened at revision 58 and the two repositories have not been synced ever since.

The focus of this fork is to implement additional functionalities to ttstrans. Therefore, code not related to ttstrans was left untouched.

The goal of ttstrans is to translate from and to various formalisms to describe Petri-net like models. Our effort focused on the translation to the input language used by the mist tool.

We implemented additional translations into the input language of mist. The goal was to obtain problem encodings using less variables that the original translation.

Compilation instructions for g++

1. Required:

   • g++ >= 4.8 only (available in Ubuntu 14.10)
   • boost libraries (tested with version 1.46--1.49; 1.49 is available in Ubuntu 14.10)
   • boost_filesystem
   • boost_system
   • boost_thread
   • boost_program_options

   To install these libraries:

$ sudo apt-get install libboost-dev
$ sudo apt-get install libboost-filesystem-dev
$ sudo apt-get install libboost-thread-dev
$ sudo apt-get install libboost-program-options-dev

2. Create the target directory:

$ mkdir ./bin/bfc/release

3. On Ubuntu 14.10, compile ttstrans with:

$ g++-4.8 -O3 -I./src/core ./src/core/trans.cc ./src/core/tstate.cc  ./src/core/antichain.cc ./src/core/bstate.cc ./src/core/cmb_node.cc ./src/bfc/bfc.cc ./src/core/complement.cc ./src/core/ostate.cc ./src/core/vstate.cc ./src/core/types.cc ./src/core/net.cc -o./bfc -lboost_filesystem -lboost_system -std=c++11 -pthread -lboost_thread -lboost_program_options

3. On OS X 10.9.5, compile with

$ clang++ -I./src/core/ -o ./ttstrans/ttstrans ./src/core/net.cc ./src/core/trans.cc ./src/core/tstate.cc ./src/core/antichain.cc ./src/core/bstate.cc ./ttstrans/ttstrans.cc ./src/core/ostate.cc ./src/core/vstate.cc ./src/core/types.cc -lboost_filesystem -lboost_system -std=c++11 -stdlib=libc++  -pthread -lboost_thread-mt -lboost_program_options

Compilation instructions for Visual Studio 2010

1. Required:

   • boost libraries (tested with version 1.46 and 1.47)
   • boost_filesystem
   • boost_system
   • boost_thread
   • boost_program_options Pre-compiled 32-bit library binaries are also available here: http://www.boostpro.com/download/.

2. Open bfc.sln and adjust the project properties:

   • Path "C:\Program Files (x86)\boost\boost_1_47" in the "Additional Include Directories" field under "C/C++".
   • Path "C:\Program Files (x86)\boost\boost_1_47\lib" in the "Additional Library Directories" field under "Linker/General".

3. Build the solution.

Usage

$ ttstrans --input-file <filename> -w MIST -a <target_state> -i <initial_state> -[z|s|l]

Options

Option	Effect of the option
z	Produces N counters where N is the total number of shared states (originally implemented).
s	Produces 2 counters regardless of the number of shared states.
l	Produces 2*log(N) counters where N is the total number of shared states.

• -z implements the original translation. It produces one counter per shared state.
• -s implements the most aggressive translation. It produces two counters, c0 and c1, to represent all the shared states. Say we have N shared states. To represent the state N-5 we use the valuation c0 = 5 and c1 = N-5. Note that we use two counters because we want the output to corresponds to a Petri net (or vector addition system) and thus are limited to guard given by inequalities. In this case the conjunction of inequalities c0 >= 5 and c1 >= N-5 suffices to identify the shared state 5.
• -l implements a less aggressive encoding that uses the binary encoding of N and then uses two counters to represent each bit of the encoding. Overall the produces 2*log(N) counters where N is the total number of shared states.