Blog
An Insight Into the AdaCore Ecosystem
Announcing Advent of Ada/SPARK 2025: Coding for a Cause!
Claire Dross
Manual Proof with Ghost Code in SPARK 2014
Guiding automatic solvers by adding intermediate assertions is a commonly used technique. We can go further in this direction, by adding complete…
Gem #160 : Developing unit tests with GNATtest
No one likes to spend the time on testing. It's tedious and boring writing the test harness, the tests themselves, and keeping them in sync with your…
Yannick Moy
Short Video Demo of SPARK 2014
New to SPARK? Want to "see" what's new in SPARK 2014? It's all in this 5 mn video demo!
Gem #159 : GPRinstall - Part 2
GPRinstall is a tool recently developed by AdaCore that provides an easy way to install a project, whether it be a standard project, a library…
Yannick Moy
Use of SPARK in a Certification Context
Using SPARK or any other formal method in a certification requires that the applicant agrees with the certification authority on the verification…
Gem #158: GPRinstall - Part 1
GPRinstall is a tool recently developed by AdaCore that provides an easy way to install a project, whether it be a standard project, a library…
Claire Dross
Contracts of Functions in SPARK 2014
In SPARK 2014, we can write a function F and annotate it with a pre and a postcondition. In this post, we explain how the SPARK 2014 proof tool…
Florian Schanda
SPARK 2014 Rationale: Information Flow
In a previous blog post we described how aspect Global can be used to designate the specific global variables that a subprogram has to read and…
Yannick Moy
Contextual Analysis of Subprograms Without Contracts
We have implemented a new feature in GNATprove for analyzing local subprograms in the context of their calls. This makes it possible to benefit from…
Johannes Kanig
Prove in Parallel with SPARK 2014
The article explains how we improved the performance of the SPARK 2014 toolset when multiple CPU cores are available for proof.
Yannick Moy
Studies of Contracts in Practice
Two recent research papers focus on how program contracts are used in practice in open source projects, in three languages that support contracts…
Johannes Kanig
A Little Exercise With Strings
I recently looked at string manipulation functions in a library and tried to prove absence of run-time errors of one of them. Although the function…