UniTO/anno3/vpc/consegne/4/uppaallC.xml

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE nta PUBLIC '-//Uppaal Team//DTD Flat System 1.1//EN' 'http://www.it.uu.se/research/group/darts/uppaal/flat-1_2.dtd'>
<nta>
	<declaration>// Place global declarations here.
clock time;

bool ack = 0;
bool frame = 0;
bool expected=0;


urgent chan ML;
urgent chan LM;
urgent chan LR;
urgent chan RL;

int TOUT = 160; // timeout</declaration>
	<template>
		<name x="5" y="5">Sender_2t</name>
		<declaration>clock sc;
clock fc;

clock timer0;
clock timer1;

bool next = 0;</declaration>
		<location id="id0" x="-153" y="0">
			<name x="-213" y="-34">send_pkg1</name>
		</location>
		<location id="id1" x="654" y="-8">
			<name x="671" y="-16">send_pkg</name>
		</location>
		<location id="id2" x="-153" y="187">
			<name x="-163" y="153">wait_ack1</name>
			<label kind="invariant" x="-196" y="204">timer1 &lt;= TOUT</label>
		</location>
		<location id="id3" x="646" y="178">
			<name x="663" y="170">wait_ack</name>
			<label kind="invariant" x="663" y="187">timer0 &lt;= TOUT</label>
		</location>
		<location id="id4" x="476" y="323">
			<name x="451" y="340">recover_loss</name>
			<label kind="invariant" x="459" y="357">sc &lt;= 2</label>
		</location>
		<location id="id5" x="51" y="323">
			<label kind="invariant" x="34" y="340">sc &lt;= 2</label>
		</location>
		<location id="id6" x="399" y="178">
			<name x="348" y="144">received_ack</name>
			<label kind="invariant" x="348" y="187">sc &lt;= 4</label>
		</location>
		<location id="id7" x="170" y="178">
			<name x="160" y="144">received_ack1</name>
			<label kind="invariant" x="178" y="186">sc &lt;= 4</label>
		</location>
		<location id="id8" x="280" y="-8">
			<name x="246" y="-59">wait</name>
			<label kind="invariant" x="263" y="-42">sc&lt;=2</label>
		</location>
		<init ref="id8"/>
		<transition>
			<source ref="id3"/>
			<target ref="id4"/>
			<label kind="guard" x="578" y="238">timer0 == TOUT</label>
			<label kind="assignment" x="552" y="255">sc := 0</label>
		</transition>
		<transition>
			<source ref="id1"/>
			<target ref="id3"/>
			<label kind="synchronisation" x="612" y="68">ML!</label>
			<label kind="assignment" x="586" y="85">timer0 := 0,
fc := 0</label>
		</transition>
		<transition>
			<source ref="id2"/>
			<target ref="id5"/>
			<label kind="guard" x="-76" y="221">timer1 == TOUT</label>
			<label kind="assignment" x="-42" y="238">sc := 0</label>
		</transition>
		<transition>
			<source ref="id0"/>
			<target ref="id2"/>
			<label kind="synchronisation" x="-136" y="76">ML!</label>
			<label kind="assignment" x="-136" y="93">timer1 :=0,
fc := 0</label>
		</transition>
		<transition>
			<source ref="id7"/>
			<target ref="id5"/>
			<label kind="guard" x="119" y="238">ack != next</label>
		</transition>
		<transition>
			<source ref="id6"/>
			<target ref="id4"/>
			<label kind="guard" x="399" y="255">ack != next</label>
		</transition>
		<transition>
			<source ref="id3"/>
			<target ref="id6"/>
			<label kind="synchronisation" x="510" y="161">LM!</label>
			<label kind="assignment" x="502" y="186">sc :=0</label>
		</transition>
		<transition>
			<source ref="id2"/>
			<target ref="id7"/>
			<label kind="synchronisation" x="-17" y="153">LM!</label>
			<label kind="assignment" x="-17" y="170">sc := 0</label>
		</transition>
		<transition>
			<source ref="id8"/>
			<target ref="id1"/>
			<label kind="guard" x="408" y="-25">sc &gt;= 1 &amp;&amp; next == 0</label>
			<label kind="assignment" x="425" y="-41">frame := next</label>
		</transition>
		<transition>
			<source ref="id8"/>
			<target ref="id0"/>
			<label kind="guard" x="-34" y="-26">sc &gt;= 2 &amp;&amp; next == 1</label>
			<label kind="assignment" x="-17" y="-42">frame := next</label>
		</transition>
		<transition>
			<source ref="id5"/>
			<target ref="id0"/>
			<label kind="guard" x="-221" y="314">sc &gt;= 1</label>
			<nail x="-281" y="331"/>
			<nail x="-281" y="186"/>
		</transition>
		<transition>
			<source ref="id4"/>
			<target ref="id1"/>
			<label kind="guard" x="680" y="289">sc &gt;= 1</label>
			<nail x="790" y="306"/>
			<nail x="790" y="153"/>
		</transition>
		<transition>
			<source ref="id6"/>
			<target ref="id8"/>
			<label kind="guard" x="365" y="93">sc &gt;= 2 &amp;&amp; ack == next</label>
			<label kind="assignment" x="348" y="34">sc :=0,
next := !next,
expected := 0</label>
		</transition>
		<transition>
			<source ref="id7"/>
			<target ref="id8"/>
			<label kind="guard" x="0" y="110">sc &gt;= 2 &amp;&amp; ack == next</label>
			<label kind="assignment" x="51" y="51">sc :=0,
next := !next,
expected := 1</label>
		</transition>
	</template>
	<template>
		<name>Receiver</name>
		<declaration>clock rc;
bool r_frame = 0;</declaration>
		<location id="id9" x="-32955" y="-5108">
			<name x="-32929" y="-5125">is_dup</name>
			<label kind="invariant" x="-32920" y="-5100">rc &lt;= 4</label>
		</location>
		<location id="id10" x="-33150" y="-4947">
			<name x="-33201" y="-4930">send_ack</name>
		</location>
		<location id="id11" x="-32751" y="-4956">
			<name x="-32725" y="-4964">done_pkg</name>
			<label kind="invariant" x="-32768" y="-4939">rc&lt;=4</label>
		</location>
		<location id="id12" x="-32742" y="-5278">
			<name x="-32725" y="-5287">recv_pkg</name>
			<label kind="invariant" x="-32759" y="-5261">rc&lt;=4</label>
		</location>
		<location id="id13" x="-33150" y="-5278">
			<name x="-33184" y="-5321">wait</name>
		</location>
		<init ref="id13"/>
		<transition>
			<source ref="id9"/>
			<target ref="id10"/>
			<label kind="guard" x="-33065" y="-5066">rc &gt;= 2</label>
			<label kind="assignment" x="-33073" y="-5015">ack := !r_frame</label>
		</transition>
		<transition>
			<source ref="id12"/>
			<target ref="id9"/>
			<label kind="guard" x="-33090" y="-5219">frame != r_frame &amp;&amp; rc &gt;= 2</label>
			<label kind="assignment" x="-32861" y="-5185">rc := 0</label>
		</transition>
		<transition>
			<source ref="id10"/>
			<target ref="id13"/>
			<label kind="synchronisation" x="-33192" y="-5074">RL!</label>
		</transition>
		<transition>
			<source ref="id11"/>
			<target ref="id10"/>
			<label kind="guard" x="-32963" y="-4981">rc&gt;=2</label>
			<label kind="assignment" x="-33048" y="-4938">ack := r_frame,
r_frame := !r_frame</label>
		</transition>
		<transition>
			<source ref="id13"/>
			<target ref="id12"/>
			<label kind="synchronisation" x="-32903" y="-5338">LR!</label>
			<label kind="assignment" x="-32903" y="-5321">rc:=0</label>
		</transition>
		<transition>
			<source ref="id12"/>
			<target ref="id11"/>
			<label kind="guard" x="-32750" y="-5049">rc&gt;=2 &amp;&amp; frame == r_frame</label>
			<label kind="assignment" x="-32674" y="-5066">rc:=0</label>
		</transition>
	</template>
	<template>
		<name>Link</name>
		<declaration>clock lc;</declaration>
		<location id="id14" x="-34" y="-297">
			<name x="-44" y="-331">loss</name>
		</location>
		<location id="id15" x="-263" y="60">
			<name x="-340" y="51">resend_pkg</name>
		</location>
		<location id="id16" x="-255" y="-187">
			<name x="-417" y="-196">received_pkg</name>
			<label kind="invariant" x="-272" y="-221">lc&lt;4</label>
		</location>
		<location id="id17" x="179" y="60">
			<name x="196" y="51">resend_ack</name>
		</location>
		<location id="id18" x="187" y="-187">
			<name x="204" y="-196">received_ack</name>
			<label kind="invariant" x="170" y="-221">lc&lt;4</label>
		</location>
		<location id="id19" x="-34" y="-93">
			<name x="-25" y="-136">idle</name>
		</location>
		<init ref="id19"/>
		<transition>
			<source ref="id18"/>
			<target ref="id14"/>
		</transition>
		<transition>
			<source ref="id16"/>
			<target ref="id14"/>
		</transition>
		<transition>
			<source ref="id14"/>
			<target ref="id19"/>
		</transition>
		<transition>
			<source ref="id15"/>
			<target ref="id19"/>
			<label kind="synchronisation" x="-110" y="26">LR?</label>
		</transition>
		<transition>
			<source ref="id16"/>
			<target ref="id15"/>
			<label kind="guard" x="-298" y="-119">lc&gt;=2</label>
		</transition>
		<transition>
			<source ref="id19"/>
			<target ref="id16"/>
			<label kind="synchronisation" x="-178" y="-170">ML?</label>
			<label kind="assignment" x="-178" y="-127">lc:=0</label>
		</transition>
		<transition>
			<source ref="id17"/>
			<target ref="id19"/>
			<label kind="synchronisation" x="86" y="17">LM?</label>
		</transition>
		<transition>
			<source ref="id18"/>
			<target ref="id17"/>
			<label kind="guard" x="196" y="-111">lc&gt;=2</label>
		</transition>
		<transition>
			<source ref="id19"/>
			<target ref="id18"/>
			<label kind="synchronisation" x="102" y="-162">RL?</label>
			<label kind="assignment" x="102" y="-128">lc:=0</label>
		</transition>
	</template>
	<template>
		<name>Sender_1t</name>
		<declaration>clock sc;
clock fc;

clock timer0;
clock timer1;

bool next = 0;
</declaration>
		<location id="id20" x="-1598" y="-221">
			<name x="-1581" y="-229">send_pkg</name>
		</location>
		<location id="id21" x="-1606" y="-35">
			<name x="-1589" y="-43">wait_ack</name>
			<label kind="invariant" x="-1589" y="-26">timer0 &lt;= TOUT</label>
		</location>
		<location id="id22" x="-1904" y="111">
			<name x="-1929" y="128">recover_loss</name>
			<label kind="invariant" x="-1921" y="145">sc &lt;= 2</label>
		</location>
		<location id="id23" x="-1972" y="-25">
			<name x="-2023" y="-59">received_ack</name>
			<label kind="invariant" x="-2023" y="-16">sc &lt;= 4</label>
		</location>
		<location id="id24" x="-1972" y="-221">
			<name x="-2006" y="-272">wait</name>
			<label kind="invariant" x="-1989" y="-255">sc&lt;=2</label>
		</location>
		<init ref="id24"/>
		<transition>
			<source ref="id21"/>
			<target ref="id22"/>
			<label kind="guard" x="-1674" y="25">timer0 == TOUT</label>
			<label kind="assignment" x="-1700" y="42">sc := 0</label>
		</transition>
		<transition>
			<source ref="id20"/>
			<target ref="id21"/>
			<label kind="synchronisation" x="-1640" y="-145">ML!</label>
			<label kind="assignment" x="-1666" y="-128">timer0 := 0,
fc := 0</label>
		</transition>
		<transition>
			<source ref="id23"/>
			<target ref="id22"/>
			<label kind="guard" x="-1981" y="43">ack != next</label>
		</transition>
		<transition>
			<source ref="id21"/>
			<target ref="id23"/>
			<label kind="synchronisation" x="-1742" y="-52">LM!</label>
			<label kind="assignment" x="-1750" y="-27">sc :=0</label>
		</transition>
		<transition>
			<source ref="id24"/>
			<target ref="id20"/>
			<label kind="guard" x="-1844" y="-238">sc &gt;= 1</label>
			<label kind="assignment" x="-1827" y="-254">frame := next</label>
		</transition>
		<transition>
			<source ref="id22"/>
			<target ref="id20"/>
			<label kind="guard" x="-1572" y="76">sc &gt;= 1</label>
			<nail x="-1462" y="93"/>
			<nail x="-1462" y="-60"/>
		</transition>
		<transition>
			<source ref="id23"/>
			<target ref="id24"/>
			<label kind="guard" x="-1930" y="-145">sc &gt;= 2 &amp;&amp; ack == next</label>
			<label kind="assignment" x="-1955" y="-178">sc :=0,
next := !next</label>
		</transition>
	</template>
	<system>sender = Sender_2t();
receiver = Receiver();
link = Link();

system sender, receiver, link;</system>
	<queries>
		<query>
			<formula>A[] (not deadlock)
			</formula>
			<comment>
			</comment>
		</query>
		<query>
			<formula>sender.wait_ack || sender.wait_ack1 --&gt; (sender.received_ack || sender.received_ack1)
			</formula>
			<comment>
			</comment>
		</query>
		<query>
			<formula>link.loss --&gt; (sender.send_pkg || receiver.send_ack)
			</formula>
			<comment>
			</comment>
		</query>
		<query>
			<formula>E&lt;&gt; (ack == expected)
			</formula>
			<comment>
			</comment>
		</query>
		<query>
			<formula>link.loss --&gt; (sender.send_pkg || sender.send_pkg1 || receiver.send_ack)
			</formula>
			<comment>
			</comment>
		</query>
	</queries>
</nta>