Electrum is a formal specification framework, inspired by Alloy and TLA+, tailored for the lightweight specification and analysis of dynamic systems with rich configurations, developed by members of HASLab and ONERA. Electrum is supported by two model-checking techniques, one bounded based on the Alloy Analyzer, and the other unbounded built over the nuXmv model checker, to verify systems expressed in such language.
More information available in the paper "Lightweight Specification and Analysis of Dynamic Systems with Rich Configurations" by N. Macedo, J. Brunel, D. Chemouil, A. Cunha and D. Kuperberg at FSE 2016.