LOPSTR

International Symposium on Logic-Based Program Synthesis and Transformation

Editions listed11 Covered2015–2025 Rank nowCORE B ProceedingsPaywalled

Editions

Year	Ed.	Held	Where	Paper deadline	Accepted	Rate
2025	35	9–10 Sep 2025	University of Calabria 🇮🇹	16 May	—	—
2024	34	9–11 Sep 2024	Milan 🇮🇹	19 May +9 days	—	—
2023	33	23–24 Oct 2023	Cascais 🇵🇹	9 Jun +14 days	—	—
2022	32	21–23 Sep 2022	Tbilisi 🇬🇪	9 May	—	—
2021	31	7–9 Sep 2021	Tallinn 🇪🇪	25 Jun +41 days	—	—
2020	30	7–9 Sep 2020	Online	19 Jun +7 days	—	—
2019	29	8–10 Oct 2019	Porto 🇵🇹	30 Jun +6 days	—	—
2018	28	4–6 Oct 2018	Frankfurt 🇩🇪	30 Jun +90 days	—	—
2017	27	10–12 Oct 2017	Namur 🇧🇪	25 Jun +12 days	—	—
2016	26	6–8 Sep 2016	Edinburgh 🏴󠁧󠁢󠁳󠁣󠁴󠁿	27 Jun +13 days	—	—
2015	25	13–15 Jul 2015	Siena 🇮🇹	2 May	—	—

A missing year does not mean the conference did not meet: coverage before 2015 has not been verified.

How it has reviewed and published

Practice	15	16	17	18	19	20	21	22	23	24	25
Proceedings	•	•	•	•	•	•	•	•	•	•	•

Practice

Proceedings

•

A blank cell means nobody has checked that year, not that the answer is no. Licences are read as recorded on the edition, never inherited from the publisher.

Where it has met

Loads tiles from OpenStreetMap, which will see your IP address.

10 cities. 20152025

10 cities, 7 countries, 2 continents. Met online 1 time.

CORE rank over time

B 2015–

Only the current rank is recorded; earlier rounds have not been checked.

Timing

Closes: between 9 May and 25 Jun, over the last 6 editions.
Decision: 31 days after the deadline (21–45 over 11 editions)
Then: 74 days to the conference (34–93)

No call is open. If it runs again and keeps to its habits, expect the next one to close in the same window — but that is this page reading a pattern, not an announcement.

Deadline habits

Extended: 8 of 8 editions
Typical: 6–90 days
Longest: 90 days
Not known: 3 editions

An edition counts as firm only when it was checked; a deadline with no earlier date recorded is counted as not known, not as firm.

Elsewhere

Calendar: Subscribe to LOPSTR
Data: All editions as JSON

Notes carried over

Deadline extension: 12 days (2014), 21 days (2015), 13 days (2016), 12 days (2017), 7+7 days (2018), 6 days (2019), 7 days (2020), 23+18 days (2021), 14 days (2023), 9 days (2024).

Kept verbatim from the old site while it is being turned into structured data.

Spotted something wrong on this page? Tell us, with a source if you have one ↗

Data entirely hand-typed, one call for papers at a time. There is no scraper behind any of this: I read the call for papers and/or the Web sites and type the dates in, in the gaps between other work, and with the hope it is useful to others. Organisers might then move deadlines without telling anyone, which may lead to inconsistencies. So, treat this small page as a well-meaning notebook rather than an authority 🤓