Abstract QVT Relations (QVT-R) is the standard language proposed by the OMG to specify
bidirectional model transformations. Unfortunately, in part due to ambiguities and omissions …

The share of formal methods is still marginal in contemporary systems and software
engineering. One of the reasons is the absence of systematic guidelines and evaluation …

DynAlloy is an extension of Alloy to support the definition of actions and the specification of
assertions regarding execution traces. In this article we show how we can extend the Alloy …

Alloy is a specification language based on a relational first-order logic with built-in operators
for transitive closure, set cardinality, and integer arithmetic. The Alloy Analyzer checks Alloy …

This article contains two main contributions. On the theoretical side, it presents a novel
complete proof calculus for Alloy. On the applied side we present Dynamite, a tool that …

Automatic analysis of Alloy models is supported by the Alloy Analyzer, a tool that translates
an Alloy model to a propositional formula that is then analyzed using off-the-shelf SAT …

Refatoramentos são geralmente propostos de maneira ad hoc, porque é difí&# 305; cil
provar formalmente que eles preservam comportamento. Na prática, desenvolvedores …

Refactorings are usually proposed in an ad hoc way because it is difficult to prove that they
are sound with respect to a formal semantics, not guaranteeing the absence of type errors or …

Nowadays, software artifacts are ubiquitous in our lives being an essential part of home
appliances, cars, cell phones, and even in more critical activities like aeronautics and health …

Model transformations are usually difficult to automate as they require to transform graphs
into other graphs while the result must respect a set of predefined constraints. In previous …