diff --git a/Model/model.xml b/Model/model.xml
index be6308a..bcc5f0e 100644
--- a/Model/model.xml
+++ b/Model/model.xml
@@ -24,7 +24,6 @@ void initialize(TCP_packet& p)
 TCP_packet packet;</declaration><template><name>Network</name><parameter>const int network</parameter><declaration>int target; // the target for the current network packet
 TCP_packet transfer;
 
-
 void set_target() {
     target = target_address;
 }
@@ -36,7 +35,7 @@ void receive_packet(){
 void send_packet(){
 	packet := transfer;
 }
-</declaration><location id="id0" x="-672" y="-736"><name x="-682" y="-766">PacketLost</name><committed/></location><location id="id1" x="-864" y="-864"><name x="-1008" y="-888">PacketInTransit</name></location><location id="id2" x="-864" y="-608"><name x="-912" y="-584">ReadyToReceive</name></location><init ref="id2"/><transition><source ref="id0"/><target ref="id2"/></transition><transition><source ref="id1"/><target ref="id2"/><label kind="synchronisation" x="-976" y="-768">Packet[target]!</label><label kind="assignment" x="-968" y="-752">send_packet()</label></transition><transition><source ref="id2"/><target ref="id1"/><label kind="synchronisation" x="-1120" y="-784">Packet[network]?</label><label kind="assignment" x="-1120" y="-768">set_target(),
+</declaration><location id="id0" x="-672" y="-736"><name x="-682" y="-766">PacketLost</name><committed/></location><location id="id1" x="-864" y="-864"><name x="-1008" y="-888">PacketInTransit</name></location><location id="id2" x="-864" y="-608"><name x="-912" y="-584">ReadyToReceive</name></location><init ref="id2"/><transition><source ref="id1"/><target ref="id0"/></transition><transition><source ref="id0"/><target ref="id2"/></transition><transition><source ref="id1"/><target ref="id2"/><label kind="synchronisation" x="-976" y="-768">Packet[target]!</label><label kind="assignment" x="-968" y="-752">send_packet()</label></transition><transition><source ref="id2"/><target ref="id1"/><label kind="synchronisation" x="-1120" y="-784">Packet[network]?</label><label kind="assignment" x="-1120" y="-768">set_target(),
 receive_packet()</label><nail x="-992" y="-608"/><nail x="-992" y="-864"/><nail x="-992" y="-864"/></transition></template><template><name>Host_Handshake</name><parameter>const int local, const int remote, const int network</parameter><declaration>clock c;
 int last_syn = 0;
 int last_ack = 0;
@@ -66,16 +65,20 @@ void initialize()
 {
 	last_syn := 0;
 	last_ack := 0;
-}</declaration><location id="id3" x="-96" y="0"><committed/></location><location id="id4" x="-384" y="-96"><committed/></location><location id="id5" x="-672" y="-192"><committed/></location><location id="id6" x="-384" y="0"><name x="-416" y="16">Established</name></location><location id="id7" x="-672" y="-96"><name x="-752" y="-104">SynRcvd</name></location><location id="id8" x="-96" y="-96"><name x="-56" y="-136">SynSent</name><label kind="invariant" x="-64" y="-120">c &lt;= UBOUND</label></location><location id="id9" x="-384" y="-192"><name x="-400" y="-232">Listen</name></location><location id="id10" x="-384" y="-384"><name x="-456" y="-384">Closed</name></location><init ref="id10"/><transition><source ref="id6"/><target ref="id6"/><nail x="-432" y="64"/><nail x="-352" y="64"/></transition><transition><source ref="id8"/><target ref="id8"/><label kind="guard" x="40" y="-104">c &gt; LBOUND</label><label kind="synchronisation" x="40" y="-88">Packet[network]!</label><label kind="assignment" x="40" y="-72">set_target(last_syn, 0),
-c := 0</label><nail x="32" y="-64"/><nail x="32" y="-96"/></transition><transition><source ref="id10"/><target ref="id10"/><label kind="synchronisation" x="-480" y="-512">Packet[local]?</label><nail x="-368" y="-496"/><nail x="-400" y="-496"/></transition><transition><source ref="id3"/><target ref="id6"/><label kind="synchronisation" x="-288" y="-40">Packet[network]!</label><label kind="assignment" x="-328" y="-24">set_target(0, update_ack())</label></transition><transition><source ref="id4"/><target ref="id7"/><label kind="synchronisation" x="-520" y="-144">Packet[network]!</label><label kind="assignment" x="-560" y="-128">set_target(0, update_ack()),
-c := 0</label></transition><transition><source ref="id5"/><target ref="id7"/><label kind="synchronisation" x="-808" y="-176">Packet[network]!</label><label kind="assignment" x="-952" y="-160">set_target(update_syn(), update_ack()),
-c := 0</label></transition><transition><source ref="id9"/><target ref="id5"/><label kind="guard" x="-584" y="-240">packet.syn != 0 &amp;&amp;
-packet.ack == 0</label><label kind="synchronisation" x="-584" y="-256">Packet[local]?</label><label kind="assignment" x="-584" y="-216">receive_packet()</label></transition><transition><source ref="id8"/><target ref="id3"/><label kind="guard" x="-88" y="-40">packet.ack == last_syn &amp;&amp;
-packet.syn != 0</label><label kind="synchronisation" x="-88" y="-56">Packet[local]?</label><label kind="assignment" x="-72" y="-8">receive_packet()</label></transition><transition><source ref="id8"/><target ref="id4"/><label kind="guard" x="-288" y="-144">packet.syn != 0 &amp;&amp;
-packet.ack == 0</label><label kind="synchronisation" x="-288" y="-160">Packet[local]?</label><label kind="assignment" x="-288" y="-120">receive_packet()</label></transition><transition><source ref="id9"/><target ref="id8"/><label kind="synchronisation" x="-296" y="-232">Packet[network]!</label><label kind="assignment" x="-320" y="-216">set_target(update_syn(), 0)</label><nail x="-128" y="-192"/><nail x="-128" y="-128"/></transition><transition><source ref="id7"/><target ref="id6"/><label kind="guard" x="-608" y="-56">packet.ack == last_syn &amp;&amp;
-packet.syn == 0</label><label kind="synchronisation" x="-608" y="-72">Packet[local]?</label><label kind="assignment" x="-608" y="-24">receive_packet()</label><nail x="-672" y="0"/></transition><transition><source ref="id8"/><target ref="id10"/><nail x="-64" y="-128"/><nail x="-64" y="-416"/><nail x="-352" y="-416"/></transition><transition><source ref="id10"/><target ref="id8"/><label kind="synchronisation" x="-240" y="-384">Packet[network]!</label><label kind="assignment" x="-240" y="-368">initialize(),
+}</declaration><location id="id3" x="-520" y="-672"><name x="-528" y="-656">SynRcvd1</name><label kind="invariant" x="-536" y="-640">c &lt;= UBOUND</label></location><location id="id4" x="-104" y="-448"><committed/></location><location id="id5" x="-392" y="-544"><committed/></location><location id="id6" x="-880" y="-872"><committed/></location><location id="id7" x="-392" y="-448"><name x="-424" y="-432">Established</name></location><location id="id8" x="-880" y="-544"><name x="-976" y="-576">SynRcvd2</name><label kind="invariant" x="-1000" y="-560">c &lt;= UBOUND</label></location><location id="id9" x="-104" y="-544"><name x="-64" y="-584">SynSent</name><label kind="invariant" x="-72" y="-568">c &lt;= UBOUND</label></location><location id="id10" x="-392" y="-872"><name x="-408" y="-912">Listen</name></location><location id="id11" x="-392" y="-1064"><name x="-464" y="-1064">Closed</name></location><init ref="id11"/><transition><source ref="id7"/><target ref="id7"/><nail x="-400" y="-480"/><nail x="-432" y="-480"/></transition><transition><source ref="id7"/><target ref="id7"/><label kind="synchronisation" x="-328" y="-384">Packet[network]!</label><label kind="assignment" x="-328" y="-368">set_target(0, last_ack)</label><nail x="-328" y="-352"/><nail x="-464" y="-352"/></transition><transition><source ref="id3"/><target ref="id7"/><label kind="guard" x="-632" y="-584">packet.ack == last_syn &amp;&amp;
+packet.syn == 0</label><label kind="synchronisation" x="-632" y="-600">Packet[local]?</label><label kind="assignment" x="-632" y="-552">receive_packet()</label><nail x="-648" y="-672"/><nail x="-648" y="-512"/><nail x="-392" y="-512"/></transition><transition><source ref="id3"/><target ref="id3"/><label kind="guard" x="-552" y="-792">c &gt; LBOUND</label><label kind="synchronisation" x="-552" y="-808">Packet[network]!</label><label kind="assignment" x="-552" y="-776">set_target(0, last_ack),
+c:=0</label><nail x="-484" y="-738"/><nail x="-556" y="-738"/></transition><transition><source ref="id5"/><target ref="id3"/><label kind="synchronisation" x="-384" y="-679">Packet[network]!</label><label kind="assignment" x="-384" y="-664">set_target(0, update_ack()),
+c := 0</label><nail x="-392" y="-672"/></transition><transition><source ref="id8"/><target ref="id8"/><label kind="guard" x="-1216" y="-544">c &gt; LBOUND</label><label kind="synchronisation" x="-1216" y="-560">Packet[network]!</label><label kind="assignment" x="-1216" y="-528">set_target(last_syn, last_ack),
+c:=0</label><nail x="-1008" y="-544"/><nail x="-1008" y="-512"/></transition><transition><source ref="id9"/><target ref="id9"/><label kind="guard" x="32" y="-552">c &gt; LBOUND</label><label kind="synchronisation" x="32" y="-536">Packet[network]!</label><label kind="assignment" x="32" y="-520">set_target(last_syn, 0),
+c := 0</label><nail x="24" y="-512"/><nail x="24" y="-544"/></transition><transition><source ref="id11"/><target ref="id11"/><label kind="synchronisation" x="-488" y="-1192">Packet[local]?</label><nail x="-376" y="-1176"/><nail x="-408" y="-1176"/></transition><transition><source ref="id4"/><target ref="id7"/><label kind="synchronisation" x="-296" y="-488">Packet[network]!</label><label kind="assignment" x="-336" y="-472">set_target(0, update_ack())</label></transition><transition><source ref="id6"/><target ref="id8"/><label kind="synchronisation" x="-1160" y="-824">Packet[network]!</label><label kind="assignment" x="-1160" y="-808">set_target(update_syn(), update_ack()),
+c := 0</label></transition><transition><source ref="id10"/><target ref="id6"/><label kind="guard" x="-592" y="-920">packet.syn != 0 &amp;&amp;
+packet.ack == 0</label><label kind="synchronisation" x="-592" y="-936">Packet[local]?</label><label kind="assignment" x="-592" y="-896">receive_packet()</label></transition><transition><source ref="id9"/><target ref="id4"/><label kind="guard" x="-96" y="-488">packet.ack == last_syn &amp;&amp;
+packet.syn != 0</label><label kind="synchronisation" x="-96" y="-504">Packet[local]?</label><label kind="assignment" x="-80" y="-456">receive_packet()</label></transition><transition><source ref="id9"/><target ref="id5"/><label kind="guard" x="-296" y="-592">packet.syn != 0 &amp;&amp;
+packet.ack == 0</label><label kind="synchronisation" x="-296" y="-608">Packet[local]?</label><label kind="assignment" x="-296" y="-568">receive_packet()</label></transition><transition><source ref="id10"/><target ref="id9"/><label kind="synchronisation" x="-320" y="-920">Packet[network]!</label><label kind="assignment" x="-320" y="-904">set_target(update_syn(), 0),
+c := 0</label><nail x="-136" y="-872"/><nail x="-136" y="-576"/></transition><transition><source ref="id8"/><target ref="id7"/><label kind="guard" x="-872" y="-432">packet.ack == last_syn &amp;&amp;
+packet.syn == 0</label><label kind="synchronisation" x="-872" y="-448">Packet[local]?</label><label kind="assignment" x="-872" y="-400">receive_packet()</label><nail x="-880" y="-448"/></transition><transition><source ref="id9"/><target ref="id11"/><nail x="-72" y="-576"/><nail x="-72" y="-1096"/><nail x="-360" y="-1096"/></transition><transition><source ref="id11"/><target ref="id9"/><label kind="synchronisation" x="-248" y="-1064">Packet[network]!</label><label kind="assignment" x="-248" y="-1048">initialize(),
 set_target(update_syn(), 0),
-c := 0</label><nail x="-96" y="-384"/></transition><transition><source ref="id9"/><target ref="id10"/><nail x="-352" y="-224"/><nail x="-352" y="-352"/></transition><transition><source ref="id10"/><target ref="id9"/><label kind="assignment" x="-488" y="-296">initialize()</label><nail x="-416" y="-352"/><nail x="-416" y="-224"/></transition></template><system>Network1 = Network(0);
+c := 0</label><nail x="-104" y="-1064"/></transition><transition><source ref="id10"/><target ref="id11"/><nail x="-360" y="-904"/><nail x="-360" y="-1032"/></transition><transition><source ref="id11"/><target ref="id10"/><label kind="assignment" x="-496" y="-976">initialize()</label><nail x="-424" y="-1032"/><nail x="-424" y="-904"/></transition></template><system>Network1 = Network(0);
 Network2 = Network(0);
 Network3 = Network(0);
 Network4 = Network(0);