Import train exercise

ds/trains0.xml

@@ -0,0 +1,170 @@
+<?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>/*
+OR - 2019
+ */
+
+const int NAB = 3;         // # trains
+const int NBA = 3;
+const int N = 6;
+
+typedef int[0,NAB-1] id_tAB;
+typedef int[0,NBA-1] id_tBA;
+
+int ab=0, ba=0;
+
+chan        accesAB[NAB], accesBA[NBA], libAB[NAB], libBA[NBA];
+
+</declaration>
+	<template>
+		<name>TrainBA</name>
+		<parameter>const id_tBA id</parameter>
+		<declaration>clock x;</declaration>
+		<location id="id0" x="-51" y="0">
+			<name x="-59" y="17">A</name>
+		</location>
+		<location id="id1" x="102" y="0">
+			<name x="102" y="17">BA</name>
+			<label kind="invariant" x="119" y="0">x&lt;=10</label>
+		</location>
+		<location id="id2" x="102" y="-127">
+			<name x="92" y="-161">B</name>
+		</location>
+		<location id="id3" x="-51" y="-127">
+			<name x="-61" y="-161">Safe</name>
+		</location>
+		<init ref="id3"/>
+		<transition>
+			<source ref="id0"/>
+			<target ref="id3"/>
+			<label kind="synchronisation" x="-51" y="-80">libBA[id] !</label>
+		</transition>
+		<transition>
+			<source ref="id1"/>
+			<target ref="id0"/>
+		</transition>
+		<transition>
+			<source ref="id2"/>
+			<target ref="id1"/>
+			<label kind="synchronisation" x="102" y="-80">accesBA[id] ?</label>
+			<label kind="assignment" x="102" y="-63">x:=0</label>
+		</transition>
+		<transition>
+			<source ref="id3"/>
+			<target ref="id2"/>
+		</transition>
+	</template>
+	<template>
+		<name x="40" y="16">TrainAB</name>
+		<parameter>const id_tAB id</parameter>
+		<declaration>clock x;</declaration>
+		<location id="id4" x="96" y="96">
+			<name x="48" y="80">Safe</name>
+		</location>
+		<location id="id5" x="256" y="96">
+			<name x="272" y="80">A</name>
+		</location>
+		<location id="id6" x="96" y="232">
+			<name x="32" y="216">B</name>
+		</location>
+		<location id="id7" x="256" y="232">
+			<name x="272" y="216">AB</name>
+			<label kind="invariant" x="246" y="249">x&lt;=10</label>
+		</location>
+		<init ref="id4"/>
+		<transition>
+			<source ref="id6"/>
+			<target ref="id4"/>
+			<label kind="synchronisation" x="96" y="147">libAB[id] !</label>
+		</transition>
+		<transition>
+			<source ref="id7"/>
+			<target ref="id6"/>
+		</transition>
+		<transition>
+			<source ref="id5"/>
+			<target ref="id7"/>
+			<label kind="synchronisation" x="256" y="147">accesAB[id] ?</label>
+			<label kind="assignment" x="256" y="164">x:=0</label>
+		</transition>
+		<transition>
+			<source ref="id4"/>
+			<target ref="id5"/>
+		</transition>
+	</template>
+	<template>
+		<name x="40" y="16">CTRL</name>
+		<declaration>id_tAB list[N+1];
+int[0,N] len;
+
+// Put an element at the end of the queue
+void enqueue(id_tAB element)
+{
+        list[len++] = element;
+}
+
+// Remove the front element of the queue
+void dequeue()
+{
+        int i = 0;
+        len -= 1;
+        while (i &lt; len)
+        {
+                list[i] = list[i + 1];
+                i++;
+        }
+        list[i] = 0;
+}
+
+// Returns the front element of the queue
+id_tAB front()
+{
+   return list[0];
+}
+
+// Returns the last element of the queue
+id_tAB tail()
+{
+   return list[len - 1];
+}</declaration>
+		<location id="id8" x="246" y="127">
+			<name x="229" y="85">Free</name>
+		</location>
+		<init ref="id8"/>
+	</template>
+	<system>system TrainAB, TrainBA, CTRL;
+</system>
+	<queries>
+		<query>
+			<formula>E&lt;&gt; TrainBA(1).BA
+			</formula>
+			<comment>
+			</comment>
+		</query>
+		<query>
+			<formula>A[] forall (i : id_tBA) forall (j : id_tAB) TrainBA(i).BA &amp;&amp; TrainAB(j).AB imply i == j
+			</formula>
+			<comment>
+			</comment>
+		</query>
+		<query>
+			<formula>TrainBA(1).B --&gt; TrainBA(1).BA
+			</formula>
+			<comment>
+			</comment>
+		</query>
+		<query>
+			<formula>A&lt;&gt; TrainBA(1).BA
+			</formula>
+			<comment>
+			</comment>
+		</query>
+		<query>
+			<formula>E&lt;&gt; TrainBA(1).BA &amp; TrainBA(2).BA
+			</formula>
+			<comment>
+			</comment>
+		</query>
+	</queries>
+</nta>