Automated Technology for Verification and Analysis: 9th by Edmund M. Clarke, Paolo Zuliani (auth.), Tevfik Bultan,

By Edmund M. Clarke, Paolo Zuliani (auth.), Tevfik Bultan, Pao-Ann Hsiung (eds.)

This booklet constitutes the refereed court cases of the ninth overseas Symposium on automatic know-how for Verification and research, ATVA 2011, held in Taipei, Taiwan, in October 2011.
The 23 revised standard papers provided including five invited papers, eleven brief papers, and a pair of software papers, have been conscientiously reviewed and chosen from seventy five submissions. The papers deal with all theoretical and sensible points of computerized research, verification and synthesis; therefore delivering a discussion board for interplay among the neighborhood and the overseas examine groups and within the field.

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Extra info for Automated Technology for Verification and Analysis: 9th International Symposium, ATVA 2011, Taipei, Taiwan, October 11-14, 2011. Proceedings

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2 Expressive Power One could argue that it is not “fair” to compare sum-AWAs with NWA, due to the ability of the first to assign super-linear weights. As we show now, alternation cannot be removed even if we restrict attention to sum-UWAs with linear-bounded language. To see this, consider the “leading a’s” sum-UWA Ala in Fig. 2. One can verify that for all w ∈ {a, b}∗, we have that Max and Sum Semantics for Alternating Weighted Automata LAla (w) = −k 0 23 if w ∈ ak · b · (a + b)∗ for k ≥ 0, otherwise.

Formally, given a word w = σ1 · σ2 · · · σn , a run of A on w is a Q-labeled weighted tree τ = Tr , r, ρ , such that the following hold: Æ Æ Ê Ê – ε ∈ Tr and r(ε) = q0 . – Consider a node x ∈ Tr with r(x) = q and δ(q, σ|x|+1 ) = θ. There is a (possibly empty) set S = {(q1 , c1 ), . . , (qk , ck )} ⊆ 2Q×Ê such that S minimally satisfies θ and for all 1 ≤ d ≤ k, we have that x · d ∈ Tr , r(x · d) = qd , and ρ(x, x · d) = cd . For example, if δ(q0 , σ1 ) = ((q1 , 2) ∨ (q2 , 3)) ∧ ((q3 , 0) ∨ (q4 , −2)), then possible runs of A on σ1 have a root labeled q0 , have one node in level 1 labeled q1 (and the weight of the edge to it is 2) or q2 (with edge weight 3), and have another node in level 1 labeled q3 (with edge weight 0) or q4 (with edge weight −2).

Possible solutions include: – Requesting that implementations target a specific, widely available OS (virtual machine images may be an option as well). – Where this is not possible, or where implementations are proprietary, requiring authors to build a web interface through which reviewers can interact with a tool without actually downloading the tool executable. 36 J. Alglave et al. Also concerned by the problem of experimental repeatability, the databases community has taken exemplary steps to address this at least four years ago [39].

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