{"id":1295,"date":"2014-12-31T10:18:02","date_gmt":"2014-12-31T09:18:02","guid":{"rendered":"http:\/\/www.atelierb.eu\/?p=1295"},"modified":"2015-06-13T11:10:19","modified_gmt":"2015-06-13T10:10:19","slug":"atelier-b-4-2-celebrates-20-years","status":"publish","type":"post","link":"https:\/\/www.atelierb.eu\/en\/2014\/12\/31\/atelier-b-4-2-celebrates-20-years\/","title":{"rendered":"ATELIER B 4.2 CELEBRATES 20 YEARS"},"content":{"rendered":"<p><a href=\"\/wp-content\/uploads\/sites\/3\/2014\/12\/atelierb-20y-small.png\"><img loading=\"lazy\" class=\"alignright size-thumbnail wp-image-1290\" src=\"\/wp-content\/uploads\/sites\/3\/2014\/12\/atelierb-20y-small-150x150.png\" alt=\"atelierb-20y - small\" width=\"150\" height=\"150\" \/><\/a>Atelier B 4.2 Community Edition has been released on\u00a0December 19, \u00a02014. This release brings 151 bug corrections and 47 improvements.\u00a0Among these features, we may\u00a0mention:<\/p>\n<ul>\n<li>A new traceable, generic,\u00a0 proof obligation generator<\/li>\n<li>Addition of a proof server, in order to distribute and speed up proof<\/li>\n<li>A better integration of real and floating point numbers<\/li>\n<li>Full 64-bit support<\/li>\n<li>Boolean and integer translation fine-tuning in C4B code generator<\/li>\n<li>Accessors added to BART in order to solve refinement conflicts<\/li>\n<\/ul>\n<p>More details in the \u00a0<a href=\"\/wp-content\/uploads\/sites\/3\/2014\/12\/release-notes-atelier-b-4.2-en.pdf\">Atelier B 4.2 release notes<\/a>.<\/p>\n<p>Since its commercial birth in 1994 with the release 3.2, Atelier B has evolved continuously thanks to a number of industrial and R&amp;D projects in the railways and the microelectronics. With B for piloting trains and opening\/closing platform screen doors, millions metro passengers are safely transported every day worldwide. In 2014, more than 25% automatic metros embed safety critical software developed with Atelier B.<br \/>\nThe timeline below summarizes the main stages and evolutions that Atelier B went through over this period.<\/p>\n<p><a href=\"\/wp-content\/uploads\/sites\/3\/2014\/12\/timeline.png\"><img loading=\"lazy\" class=\"aligncenter size-large wp-image-1276\" src=\"\/wp-content\/uploads\/sites\/3\/2014\/12\/timeline-1024x543.png\" alt=\"timeline\" width=\"640\" height=\"339\" srcset=\"https:\/\/www.atelierb.eu\/wp-content\/uploads\/sites\/3\/2014\/12\/timeline-1024x543.png 1024w, https:\/\/www.atelierb.eu\/wp-content\/uploads\/sites\/3\/2014\/12\/timeline-300x159.png 300w, https:\/\/www.atelierb.eu\/wp-content\/uploads\/sites\/3\/2014\/12\/timeline.png 1383w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Atelier B 4.2 Community Edition has been released on\u00a0December 19, \u00a02014. This release brings 151 bug corrections and 47 improvements.\u00a0Among these features, we may\u00a0mention: A new traceable, generic,\u00a0 proof obligation generator Addition of a proof server, in order to distribute and speed up proof A better integration of real and floating point numbers Full 64-bit [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1290,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"amp_status":""},"categories":[4],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v14.8 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>ATELIER B 4.2 CELEBRATES 20 YEARS | Atelier B<\/title>\n<meta name=\"description\" content=\"Atelier B 4.2 Community Edition has been released on\u00a0December 19, \u00a02014. This release brings 151 bug corrections and 47 improvements.\u00a0Among these\" \/>\n<meta name=\"robots\" content=\"index, follow\" \/>\n<meta name=\"googlebot\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta name=\"bingbot\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.atelierb.eu\/2014\/12\/31\/atelier-b-4-2-celebrates-20-years\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ATELIER B 4.2 CELEBRATES 20 YEARS | Atelier B\" \/>\n<meta property=\"og:description\" content=\"Atelier B 4.2 Community Edition has been released on\u00a0December 19, \u00a02014. This release brings 151 bug corrections and 47 improvements.\u00a0Among these\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.atelierb.eu\/en\/2014\/12\/31\/atelier-b-4-2-celebrates-20-years\/\" \/>\n<meta property=\"og:site_name\" content=\"Atelier B\" \/>\n<meta property=\"article:published_time\" content=\"2014-12-31T09:18:02+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2015-06-13T10:10:19+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.atelierb.eu\/wp-content\/uploads\/sites\/3\/2014\/12\/atelierb-20y-small.png\" \/>\n\t<meta property=\"og:image:width\" content=\"201\" \/>\n\t<meta property=\"og:image:height\" content=\"192\" \/>\n<meta name=\"twitter:card\" content=\"summary\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.atelierb.eu\/en\/#website\",\"url\":\"https:\/\/www.atelierb.eu\/en\/\",\"name\":\"Atelier B\",\"description\":\"Atelier de G\\u00e9nie Logiciel\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":\"https:\/\/www.atelierb.eu\/en\/?s={search_term_string}\",\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.atelierb.eu\/en\/2014\/12\/31\/atelier-b-4-2-celebrates-20-years\/#primaryimage\",\"inLanguage\":\"fr-FR\",\"url\":\"https:\/\/www.atelierb.eu\/wp-content\/uploads\/sites\/3\/2014\/12\/atelierb-20y-small.png\",\"width\":201,\"height\":192},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.atelierb.eu\/en\/2014\/12\/31\/atelier-b-4-2-celebrates-20-years\/#webpage\",\"url\":\"https:\/\/www.atelierb.eu\/en\/2014\/12\/31\/atelier-b-4-2-celebrates-20-years\/\",\"name\":\"ATELIER B 4.2 CELEBRATES 20 YEARS | Atelier B\",\"isPartOf\":{\"@id\":\"https:\/\/www.atelierb.eu\/en\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.atelierb.eu\/en\/2014\/12\/31\/atelier-b-4-2-celebrates-20-years\/#primaryimage\"},\"datePublished\":\"2014-12-31T09:18:02+00:00\",\"dateModified\":\"2015-06-13T10:10:19+00:00\",\"author\":{\"@id\":\"https:\/\/www.atelierb.eu\/en\/#\/schema\/person\/dc53be91831360ba4c8629b5c79d0385\"},\"description\":\"Atelier B 4.2 Community Edition has been released on\\u00a0December 19, \\u00a02014. 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