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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head>
<style>
body {margin:0;}
.navbar {
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window.onload = function() {
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<link href="TheStyles.css" rel="stylesheet" type="text/css"><title>Career Award</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
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<meta http-equiv="content-type" content="text/html; charset=utf-8">
<meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="background-color: rgb(255, 255, 255); color: rgb(0, 0, 0);" alink="#ee0000" link="#0000ee" vlink="#551a8b">
<div class="navbar"> <a href="#Home">Home</a> <a href="#Research">Research</a> <a href="#Education">Education</a> <a href="#Outreach">Outreach</a>
</div>
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<div class="TextStyle" style="text-align: center;"><br>
<big><big><big><big><small>Distributed System Synthesis on
Certified Middleware</small></big></big></big></big><br>
<br>
</div>
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<tr style="border: 1px solid black;">
<td class="SubHeaderStyle" colspan="3" rowspan="1" style="vertical-align: top; background-color: white;"><span class="anchor" id="Home"></span> Home<br>
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<td class="TextStyle"><br>
CAREER: Distributed System Synthesis on Certified Middleware<br>
PI: <a href="https://www.cs.ucr.edu/%7Elesani/">Mohsen Lesani</a><br>
03/31/2020 - 03/30/2025<br>
Award Number: 1942711<br>
Managing Division Abbreviation: CCF<br>
Program Manager: Anindya Banerjee<br>
Funding Opportunity: NSF 17-537 Faculty Early Career Development Program<br><br>
<br>
Overview. This project will establish synthesis and verification
principles and tools for distributed systems. Distributed systems are
the backbone of modern computing. However, they are complicated and
prone to bugs due to their combinatorially large state-spaces, and node
and network failures. Recent occurrences of data, currency and service
loss have shown that reliability of distributed systems remains
elusive. The inherent complication is faced by not only protocol and
system designers that provide abstractions and interfaces but even
distributed application programmers that use these interfaces. This
proposal presents an integrated research and education plan to address
programmer productivity and reliability of distributed systems that
spans both the client applications and the supporting distributed
middleware. It includes both novel automatic synthesis techniques for
client applications and novel verification techniques for distributed
middleware.<br>
<br>
The contemporary exposure of distributed application programmers to
complex consistency choices is reminiscent of unstructured programming
that was considered harmful and was later abolished. Distributed stores
provide a spectrum of consistency choices that impose a dilemma for
clients between correctness, responsiveness and availability. The
recent advances in automatic reasoning tools can provide automation for
distributed programming. Given the high-level integrity properties of
the application, this project automatically decides the minimum
required coordination that guarantees integrity and convergence and,
automatically synthesizes protocols for replicated objects. It results
in a synthesis tool that automatically replicates business objects that
can be deployed on Amazon Web Services.<br>
<br>
The reliability of applications is crucially dependent on the
correctness of the underlying middleware of subtle protocols such as
broadcast and consensus. The middleware is classically designed as
stacks of layers, and the correctness of a layer is often stated as
intuitive arguments on temporal precedence of events across layers.
This project builds a development and verification framework in a proof
assistant to build a mechanically verified middleware stack. To foster
adoption, the framework is based on a compositional and temporal
program logic so that the proofs match the intuitive arguments. The
framework will include a compositional programming model, the semantics
of distributed stacks, and a provably sound temporal program logic. The
resulting stacks of fundamental distributed components will be released
as a reusable library.<br>
<br>
Note: This page also includes the results of the preliminary NSF CRII
support with award number 1657204.<br>
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<td class="SubHeaderStyle" colspan="3" rowspan="1" style="vertical-align: top; background-color: white;"><span class="anchor" id="Research"></span> <span><a name="Research"></a>
Research</span> </td>
</tr>
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</td>
<td class="TextStyle" style="vertical-align: top;"><br>
Grafs: Graph Analytics Fusion and Synthesis<br>
Farzin Houshmand, Mohsen Lesani, Keval Vora<br>
Submitted.<br>
<br>
Verified Transactions From Verified Linearizable Objects, Modularly<br>
Mohsen Lesani, Li-yao Xia, Anders Kaseorg, Christian J Bell, Adam
Chlipala, Benjamin C. Pierce, Steve Zdancewic<br>
Submitted.<br>
<br>
Hampa: Solver-aided Recency-Aware Replication<br>
Xiao Li, Farzin Houshmand, Mohsen Lesani<br>
CAV'20 (International Conference on Computer-Aided Verification)<br>
<a href="companion/cav20/">More</a><br>
<br>
TLC: Temporal Logic of Distributed Components<br>
Jeremiah Griffin, Mohsen Lesani, Narges Shadab, Xizhe Yin<br>
ICFP'20 (ACM SIGPLAN International Conference on Functional Programming)<br>
<a href="companion/icfp20/">More</a><br>
<br>
Cross-Chain Transactions<br>
Narges Shadab, Farzin Houshmand, Mohsen Lesani<br>
ICBC'20 (IEEE International Conference on Blockchain and Cryptocurrency)<br>
<a href="companion/icbc20/">More</a><br>
<br>
Learning Quantitative Representation Synthesis<br>
Mayur Patil, Farzin Houshmand, Mohsen Lesani<br>
MAPL'20 (ACM Machine Learning and Programming Languages Workshop)<br>
<a href="companion/mapl20/">More</a><br>
<br>
Hamsaz: Replication
Coordination Analysis and Synthesis<br>
Farzin Hooshmand, Mohsen Lesani<br>
POPL'19 (ACM Principles of
Programming
Languages)<br>
<a href="companion/popl19/">More</a><br>
<br>
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<td class="SubHeaderStyle" colspan="3" rowspan="1" style="vertical-align: top; background-color: white;"><span class="anchor" id="Education"></span><span style="font-weight: bold; color: black;"><a name="Education"></a>
Education</span> </td>
</tr>
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<td style="vertical-align: top;"><br>
</td>
<td class="TextStyle" style="vertical-align: top;"><span style="font-weight: bold; color: black;"> </span><br>
<p>My graduate students Farzin Houshmand, Xiao Li and Eric
Chan are being trained in the area of verification and synthesis, and
distributed computing.</p>
<p><br>
</p>
<p>- The undergraduate student Jeremiah Griffin was
supported and trained under the REU of this grant to effectively use
the Coq proof assistant. He worked on the Coq framework of the TLC
project. He formalized the component description language, the logic,
and the lowering transformation, developed automation tactics and
proved the correctness of two basic distributed system layers. He is
the first author of our ICPF paper. He is now graduated and is a strong
candidate to excel in a phd program.<br>
</p>
<br>
<p>- The undergraduate student Gregory Shar is supported
and being trained under the REU of this grant.</p>
<p><br>
</p>
<p>- Incorporated the synthesis techniques from the POPL'19
and CAV'20 papers to the course graduate course CS247: Principles of
Distributed Computing.</p>
<br>
<p>-
Incorporated the exchange protocols of the ICBC'20 paper to the course
graduate course CS247: Principles of Distributed Computing.</p>
<p><br>
</p>
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<span class="anchor" id="Outreach"></span>
<span style="font-weight: bold; color: black;"> <a name="Outreach"></a></span><span style="font-weight: bold; color: black;"> Outreach</span> </td>
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</td>
<td class="TextStyle" style="vertical-align: top;"><span class="TextStyle"></span><br>
<p>- We are collaborating with Code to Careers to give
tutorial series at the Riverside public libraries. We gave a tutorial
titled “Privacy in the Digital Age” in the Arlington Library on
06/17/19.</p>
<br>
<p>We gave a talk on blockchains on 07/27/18 and a talk on
cryptocurrency exchange on 07/12/19 at CS4All Code Camp.</p>
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