Formal Verification
What is Formal Verification
Formal Verification is a technique to check that systems fulfill selected properties with 100% certainty. For example, for a rail control system, it can be checked that signals cannot display green aspects unless certain switches are in correspondence.
While testing of big systems can never reach full coverage, due to the number of combinations that would have to be tested, formal verification provides full certainty because it uses a mathematical argument without gaps.
Several infrastructure managers now require formal verification to be done as part of the safety assessment. Even when not required, suppliers now choose to do formal verification because of the increased safety and the possibility to decrease testing by finding issues with automated techniques.
What Prover Can Offer You
Prover has performed formal verification for almost 30 years of relay-based interlockings, computer-based interlockings (such as Siemens Westrace, Ansaldo Microlok, Alstom iVPI, GE ElectroLogiXS, SCADE-based designs etc), CBTC systems, ETCS systems, micro processors, embedded systems in cars, and more.
Prover provides products, training and support in order for you to set up your own team and process to do formal verification. We will support you during the introduction as well as be there all along if expert services are needed.
Should you prefer to buy Formal Verification as a service Prover will provide you with that. Our experienced and highly skilled professional services team will then perform formal verification of your system using a set of our products tailored to your needs. Any violations of safety requirements are then reported to you along with what the causes are.
Prover’s Products
Prover’s line of formal verification products is extensive and ever-growing to go above and beyond the industry standards. Check out the following list of our latest products to see what intrigues you:
- Prover iLock: railway interlocking simulator, document & code generator, and verifier
- Prover Certifier: CENELEC SIL-4 certifiable safety evidence generator
- PSL: model checker capable of formally verifying big industrial systems
- Prover Extractor: creates and verifies databases from Microstation drawings
- Prover Trident: complete process and tool suite for interlocking design automation
- SCADE FV: CENELEC SIL-4 formal verification of systems built with SCADE
- LCF: domain specific language tailored for signaling engineering
- PiSPEC: formal language dedicated for signaling engineering
- HLL: formal high level language that includes predicate logic and supports important common programming features such as arrays and numbers
MORE ABOUT FORMAL VERIFICATION
Floating Point Model Checking
We at Prover are very happy to announce the release of version 4.0 of our model checker Prover SL CE (PSL). The most interesting new feature is support for IEEE [...]
CASCO Signal Ltd. licenses Formal Verification solution from Prover Technology
We are happy to announce that CASCO Signal Ltd. (CASCO) and Prover Technology (Prover) have entered into a long-term agreement for the supply of Prover’s Signal Design Automation product suite [...]
Save the date – SDA Forum in Shanghai Nov 6
2017 an idea was born at Prover Technology, we wanted to create a forum for sharing experiences and best practices, and for networking. Our intention was to gather leading signaling [...]
New version of HLL – integrating the best of breed
The Tool providers that support HLL have now agreed on the content of the next published version of HLL. It will be a merge of the different dialects of HLL that exist [...]
A new version of HLL emerging
The HLL Forum meeting we had in December decided to let a subgroup work on a new language definition meeting emerging needs in the market. Some of us in this [...]
Why Formal Verification – The Solution to the Verification Problem
If you have read the first two parts of this series (Read Part 1 here and Part 2 here), then you know that verifying an interlocking that satisfies safety requirements [...]