coco-team / cocosim-deprecated

Automated Analysis Framework for Simulink/Stateflow (deprecated, see cocoSim2)

CoCoSim

CoCoSim is an automated analysis and code generation framework for Simulink and Stateflow models. Specifically, CoCoSim can be used to verify automatically user-supplied safety requirements. Moreover, CoCoSim can be used to generate C and/or Rust code. CoCoSim uses Lustre as its intermediate language. CoCoSim is currently under development. We welcome any feedback and bug report.

CoCoSim ToolBox

The CoCoSim toolbox contains linux and osx binariers for the backend solvers. Download the CoCoSim ToolBox

Installation

CoCoSim can be installed and used as follows:

Dependencies

• MATLAB(c) version R2014b or newer
• Zustre
• (Optional) JKind -- Best for Windows OS users
• (Optional) Kind2
• Python2.7

Configuration

• Place the different solvers (Zustre, Kind2, JKind) under cocosim/tools/verifiers/.
• Set the configuration for the backend solvers in src/config.m:
• ZUSTRE: Path to Zustre binary.
• KIND2: Path to Kind2 binary.
• LUSTREC: Path to LustreC binary.
• Z3: Path to Z3 binary. If you install Zustre, Z3 can be found in ZUSTRE_PATH/build/run/bin/z3.
• JKIND: Path to JKind.

Launching

• Launch Matlab(c)
• Navigate to cocosim/
• Just run the file start_cocosim
• Make sure to have one of the backround solvers installed (e.g. Zustre, Kind2 and or JKind)
• You can now open your Simulink model, e.g. open test/properties/safe_1.mdl

# Example

1. To test a safe property: open test/properties/safe_1.mdl
2. Under the Tools menu choose Verify with ... and then Zustre (or JKind if you are under Windows OS).
3. To test an unsafe property (which also provide a counterexample): open test/properties/unsafe_1.mdl

More information about CoCoSim can be found here

Waffle

Developers

• Lead Developer: Temesghen Kahsai

• Current Contributors: Hamza Bourbouh (SGT - USA), Pierre-Loic Garoche (Onera - France), Claire Pagetti (Onera - France), Eric Noulard (Onera - France), Thomas Loquen (Onera - France), Xavier Thirioux (ENSEEIHT - France)

• Past Contributors: Arnaud Dieumegard (Fabruary - August 2015)

Acknowledgments and Disclaimers

CoCoSim is partially funded by:

• NASA NRA NNX14AI09G
• NSF award 1136008

Any opinions, findings and conclusions or recommendations expressed in this material are those of the author(s) do not necessarily reflect the views of NASA and NSF.

cocosim-deprecated's Issues

add timeout option in verification gui

Add support CoCoSpec in Simulink

add zustre displays to kind2

Fix issue of compilation in the TCM model (i.e. bus issue). The model can be found here: https://github.com/coco-team/benchmarks/blob/master/Simulink/tcm/no_properties/modified/ControlsWithAutopilot.mdl

Better counterexample display

Indicate no properties to verify

In case there are no properties to be verified indicate that only compilation to Lustre is happening.

working on Matlab functions in Stateflow models

CoCoSim property block as a custom library

Include the CoCoSim property block as a custom library. This will allow users to drag the CoCoSim property block to create properties.

Support for SeaHorn

Automated plotting of n-step values in Counter-example

Make Zustre return 0 or else if it fails

support History junctions

Support for stub compilation

Compile the whole model, but allow certain blocks to only have stubs

White list of blocks to be abstracted

Create a list of blocks that we have seen that are not important for verification (e.g. message viewer in Stateflow). Such list will be used in the pre-processor and the blocks will be ignored.

Fix issue with embedded matlab on the OCA Simulink model

Add support for automated Test Generation in CoCoSim

Pre-processing Input generators

We should abstract different input generators (e.g. signal builder, pulse generator) to be 'normal' input block.

Inner transitions actions order

Make the unsupported block consistent

Support for trigonometric functions

Currently, there is a support for trigonometric functions, by statically linking the generated lustre code with a library of trig functions (i.e. generated via interpolation). Fix the choice between open<math> and the one generated via generate_table.py

unify lustre syntax between zustre and kind2

example != <> ..

Unsupported blocks

In case of unsupported blocks the error should be more useful.

Eg when in presence of a contunuous block, I would be great to have an error message suggesting the use of model discretizer.

For the discrte ones, we should cover the simpler variation of the z expressions

Create GUI to show the status of CoCoSim. Instead of the matlab console

Silent error from lustrec

In case of compilation failure, for example when generating C code from Simulink, the error message within Matlab is not useful. Please provide a log of lustrec error as well.

Renaming of variables -- Non alphanumeric characters

When block or subsystems names contains non alphanumeric character the generated lustre file is not usable. Recall that lustrec lexer rule for identifier is ['' 'a'-'z'] [ '' 'a'-'z' 'A'-'Z' '0'-'9']*
In the current version, parenthesis are renamed as lpar rpar, but comma ',', plus '+' are preserved.
They should be encoded as well as strings.

correcte write_discreteintegrator

models in Simulink\unit_test\open_problem should be fixed

Support for Stateflow

Finish the compilation of Simulink to Rust

Improve the interface to create new properties

Improve the current interactive system of creating properties. One idea is to have a pop-up window with the selection of system/sub-system, etc ...

detect algebric loop in the model before running cocoSim

support include C functions in zustre (#open <conv>)