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klee-tools.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<!-- Material used from: HTML 4.01 specs: http://www.w3.org/TR/html401/ -->
<html>
<head>
<META http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>The KLEE Symbolic Virtual Machine</title>
<link type="text/css" rel="stylesheet" href="menu.css">
<link type="text/css" rel="stylesheet" href="content.css">
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<body>
<div id="menu">
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<div id="content">
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<h1>KLEE Tools</h1>
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<h3>
<a href="#ktest-tool"> 1. ktest-tool</a> <br/>
<a href="#klee-stats"> 2. klee-stats</a> <br/>
</h3>
<h2 id="ktest-tool">ktest-tool</h2>
<h2 id="klee-stats">klee-stats</h2>
<b><i>klee-stats</i></b> is a Python script used to extract and present in a
tabular form runtime statistics for a KLEE execution. The runtime statistics include:
<ul>
<li>The number of executed instructions</li>
<li>Instruction coverage in the LLVM bitcode (%)</li>
<li>Branch coverage in the LLVM bitcode (%)</li>
<li>Total static instructions in the LLVM bitcode</li>
<li>The number of currently active states</li>
<li>Megabytes of memory currently used</li>
<li>The number of queries issued to the SMT solver</li>
<li>The average number of query constructs per query</li>
<li>Various time statistics:
<ul>
<li>Total user time</li>
<li>Total wall time</li>
<li>Time spent in the constraint solver</li>
<li>Time spent in the counterexample caching code</li>
<li>Time spent forking</li>
<li>Time spent in object resolution</li>
</ul></li>
</ul>
<i>klee-stats</i> extracts statistics information from the <i>run.stats</i> file
present in the <i>klee-out-*</i> directory created during a KLEE execution.
The exact usage of <i>klee-stats</i> is as follows:
<pre>klee-stats [options] directories</pre>
The <i>directories</i> parameter is a list of <i>klee-out-*</i> directories
created by KLEE. A common scenario is to simply run <i>klee-stats</i> on <i>klee-last</i>.
<p>
In order to limit printed information only to the values of measured times,
the following options can be used:
<ul>
<li><i>--print-rel-times</i>—display time values relative
to measured execution time</li>
<li><i>--print-abs-times</i>—display absolute time values</li>
</ul>
The <i>--precision</i> option can be used to configure the number of fractional
digits displayed in floating point values. By default, 2 fractional digits
are displayed, but in some cases that might be not sufficient—if the value
is very small, e.g. 0.0001, with 2-digits precision it will be printed as 0.00.
</p>
<p> Various other options can be used to specify what values are
displayed and how they are displayed. Options for comparison of
statistics are also provided. More information about available
options can be obtained using the command:
<pre>klee-stats --help</pre>
</p>
<br/>
</div>
</body>
</html>