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<link rel="previous" href="Smt.Formula.html">
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<link title="Index of types" rel=Appendix href="index_types.html">
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<link title="Index of exceptions" rel=Appendix href="index_exceptions.html">
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<link title="Index of values" rel=Appendix href="index_values.html">
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<link title="Index of modules" rel=Appendix href="index_modules.html">
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<link title="Index of module types" rel=Appendix href="index_module_types.html">
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<link title="Smt" rel="Chapter" href="Smt.html">
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<link title="Hstring" rel="Chapter" href="Hstring.html"><link title="Profiling functions" rel="Section" href="#2_Profilingfunctions">
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<link title="Main API of the solver" rel="Section" href="#2_MainAPIofthesolver">
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<title>Smt.Make</title>
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<div class="navbar"><a href="Smt.Formula.html">Previous</a>
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<center><h1>Functor <a href="type_Smt.Make.html">Smt.Make</a></h1></center>
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<br>
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<pre><span class="keyword">module</span> Make: <div class="sig_block"><code class="code">functor (</code><code class="code">Dummy</code><code class="code"> : </code><code class="code">sig</code><div class="sig_block"></div><code class="code">end</code><code class="code">) -> </code><code class="type"><a href="Smt.Solver.html">Solver</a></code><code class="type"> </code></div></pre>Functor to create several instances of the solver<br>
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<table border="0" cellpadding="3" width="100%">
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<tr>
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<td align="left" valign="top" width="1%%"><b>Parameters: </b></td>
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<td>
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<table class="paramstable">
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<tr>
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<td align="center" valign="top" width="15%">
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<code>Dummy</code></td>
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<td align="center" valign="top">:</td>
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<td><code class="type">sig end</code>
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</table>
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</td>
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</tr>
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</table>
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<hr width="100%">
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<br>
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This SMT solver is imperative in the sense that it maintains a global
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context. To create different instances of Alt-Ergo Zero use the
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functor <a href="Smt.Make.html"><code class="code">Smt.Make</code></a>.
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<p>
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A typical use of this solver is to do the following :<pre><code class="code"> clear ();
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assume f_1;
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...
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assume f_n;
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check ();</code></pre><br>
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<pre><span id="TYPEstate"><span class="keyword">type</span> <code class="type"></code>state</span> </pre>
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<div class="info">
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The type of the internal state of the solver (see <a href="Smt.Solver.html#VALsave_state"><code class="code">Smt.Solver.save_state</code></a> and
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<a href="Smt.Solver.html#VALrestore_state"><code class="code">Smt.Solver.restore_state</code></a>).<br>
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</div>
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<br>
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<span id="2_Profilingfunctions"><h2>Profiling functions</h2></span><br>
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<pre><span id="VALget_time"><span class="keyword">val</span> get_time</span> : <code class="type">unit -> float</code></pre><div class="info">
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<code class="code">get_time ()</code> returns the cumulated time spent in the solver in seconds.<br>
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</div>
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<pre><span id="VALget_calls"><span class="keyword">val</span> get_calls</span> : <code class="type">unit -> int</code></pre><div class="info">
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<code class="code">get_calls ()</code> returns the cumulated number of calls to <a href="Smt.Solver.html#VALcheck"><code class="code">Smt.Solver.check</code></a>.<br>
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</div>
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<br>
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<span id="2_MainAPIofthesolver"><h2>Main API of the solver</h2></span><br>
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<pre><span id="VALclear"><span class="keyword">val</span> clear</span> : <code class="type">unit -> unit</code></pre><div class="info">
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<code class="code">clear ()</code> clears the context of the solver. Use this after <a href="Smt.Solver.html#VALcheck"><code class="code">Smt.Solver.check</code></a>
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raised <a href="Smt.html#EXCEPTIONUnsat"><code class="code">Smt.Unsat</code></a> or if you want to restart the solver.<br>
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</div>
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<pre><span id="VALassume"><span class="keyword">val</span> assume</span> : <code class="type">?profiling:bool -> id:int -> <a href="Smt.Formula.html#TYPEt">Smt.Formula.t</a> -> unit</code></pre><div class="info">
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<code class="code">assume ~profiling:b f id</code> adds the formula <code class="code">f</code> to the context of the
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solver with idetifier <code class="code">id</code>.
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This function only performs unit propagation.<br>
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</div>
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<div class="param_info"><code class="code">profiling</code> : if set to <code class="code">true</code> then profiling information (time) will
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be computed (expensive because of system calls).
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<p>
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<b>Raises</b> <a href="Smt.html#EXCEPTIONUnsat"><code class="code">Smt.Unsat</code></a> if the context becomes inconsistent after unit
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propagation.</div>
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<pre><span id="VALcheck"><span class="keyword">val</span> check</span> : <code class="type">?profiling:bool -> unit -> unit</code></pre><div class="info">
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<code class="code">check ()</code> runs Alt-Ergo Zero on its context. If <code class="code">()</code> is
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returned then the context is satifiable.<br>
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</div>
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<div class="param_info"><code class="code">profiling</code> : if set to <code class="code">true</code> then profiling information (time) will
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be computed (expensive because of system calls).
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<p>
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<b>Raises</b> <a href="Smt.html#EXCEPTIONUnsat"><code class="code">Smt.Unsat</code></a> <code class="code">[id_1; ...; id_n]</code> if the context is unsatisfiable.
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<code class="code">id_1, ..., id_n</code> is the unsat core (returned as the identifiers of the
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formulas given to the solver).</div>
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<pre><span id="VALsave_state"><span class="keyword">val</span> save_state</span> : <code class="type">unit -> <a href="Smt.Solver.html#TYPEstate">state</a></code></pre><div class="info">
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<code class="code">save_state ()</code> returns a <b>copy</b> of the current state of the solver.<br>
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</div>
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<pre><span id="VALrestore_state"><span class="keyword">val</span> restore_state</span> : <code class="type"><a href="Smt.Solver.html#TYPEstate">state</a> -> unit</code></pre><div class="info">
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<code class="code">restore_state s</code> restores a previously saved state <code class="code">s</code>.<br>
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</div>
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<pre><span id="VALentails"><span class="keyword">val</span> entails</span> : <code class="type">?profiling:bool -> id:int -> <a href="Smt.Formula.html#TYPEt">Smt.Formula.t</a> -> bool</code></pre><div class="info">
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<code class="code">entails ~id f</code> returns <code class="code">true</code> if the context of the solver entails
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the formula <code class="code">f</code>. It doesn't modify the context of the solver (the state
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is saved when this function is called and restored on exit).<br>
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</div>
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