This volume contains the proceedings of CHARME 2003, the12th Advanced - search Working Conference on Correct Hardware Design and Veri?cation - thods. CHARME 2003 continues the series of working conferences devoted to the development and use of leading-edge formal techniques and tools for the design and veri?cation of hardware and hardware-like systems. Previous events in the 'CHARME' series were held in Edinburgh (2001), Bad Herrenalb (1999), Montreal (1997), Frankfurt (1995), Arles (1993) and - rin (1991). This series of meetings were organized in cooperation with IFIP WG 10.5and10.2.Priormeetings,stretchingbacktotheearliestdaysofformalha- wareveri?cationwereheldundervariousnamesinMiami(1990),Leuven(1989), Glasgow (1988), Grenoble (1986), Edinburgh (1985) and Darmstadt (1984). We now have a well-established convention whereby the European CHARME con- rence alternates with its biennial counterpart, the International Conference on Formal Methods in Computer-Aided Design(FMCAD),whichisheldinev- numbered years in the USA. CHARME 2003 took place during 21-24 October 2003 at the Computer Science Department of the University of L'Aquila, Italy. It was cosponsored by the IFIP TC10/WG10 Working Group on Design and Engineering of Electronic Systems. The CHARME 2003 scienti?c program was comprised of: - A morning Tutorial by Daniel Geist aimed at industrial and academic - terchange. - Two Invited Lectures by Wolfgang Roesner and Fabio Somenzi. - Regular Sessions, featuring 24 papers selected out of 65 submissions, r- ging from foundational contributions to tool presentations. - Short Presentations, featuring 8 short contributions accompanied by a short presentation. The conference, of course, also included informal tool demonstrations, not announced in the o?cial program.