Repair/RepairCompiler/MCC/IR/Termination.java

   1 package MCC.IR;
   2 import java.util.*;
   3 import java.io.*;
   4 import MCC.State;
   5 import MCC.Compiler;
   6
   7 public class Termination {
   8     HashSet conjunctions;
   9     Hashtable conjunctionmap;
  10
  11     HashSet abstractrepair;
  12     HashSet abstractrepairadd;
  13
  14     HashSet updatenodes;
  15     HashSet consequencenodes;
  16
  17     HashSet scopenodes;
  18     Hashtable scopesatisfy;
  19     Hashtable scopefalsify;
  20     Hashtable consequence;
  21     Hashtable abstractadd;
  22     Hashtable abstractremove;
  23     Hashtable conjtonodemap;
  24     Hashtable predtoabstractmap;
  25     Set removedset;
  26     ComputeMaxSize maxsize;
  27     State state;
  28     AbstractInterferes abstractinterferes;
  29     ConcreteInterferes concreteinterferes;
  30     ConstraintDependence constraintdependence;
  31     ExactSize exactsize;
  32     ArrayAnalysis arrayanalysis;
  33     Sources sources;
  34     static String conjoption="style=bold";
  35     static String absrepoption="shape=box,color=blue,style=bold";
  36     static String updateoption="shape=box,color=red,style=bold";
  37     static String scopeoption="color=brown";
  38     static String conseqoption="style=bold,color=green";
  39     static String compoption="shape=box,color=purple,style=bold";
  40
  41     public Termination(State state) {
  42         this.state=state;
  43         conjunctions=new HashSet();
  44         conjunctionmap=new Hashtable();
  45         abstractrepair=new HashSet();
  46         abstractrepairadd=new HashSet();
  47         scopenodes=new HashSet();
  48         scopesatisfy=new Hashtable();
  49         scopefalsify=new Hashtable();
  50         consequence=new Hashtable();
  51         updatenodes=new HashSet();
  52         consequencenodes=new HashSet();
  53         abstractadd=new Hashtable();
  54         abstractremove=new Hashtable();
  55         conjtonodemap=new Hashtable();
  56         predtoabstractmap=new Hashtable();
  57         if (!Compiler.REPAIR)
  58             return;
  59
  60
  61         for(int i=0;i<state.vRules.size();i++)
  62             System.out.println(state.vRules.get(i));
  63         for(int i=0;i<state.vConstraints.size();i++)
  64             System.out.println(state.vConstraints.get(i));
  65
  66         sources=new Sources(state);
  67         maxsize=new ComputeMaxSize(state);
  68         exactsize=new ExactSize(state);
  69         arrayanalysis=new ArrayAnalysis(state,this);
  70
  71         abstractinterferes=new AbstractInterferes(this);
  72         concreteinterferes=new ConcreteInterferes(this);
  73         generateconjunctionnodes();
  74         constraintdependence=new ConstraintDependence(state,this);
  75
  76         debugmsg("*****Generating scope nodes*****");
  77         generatescopenodes();
  78         debugmsg("*****Generating repair nodes*****");
  79         generaterepairnodes();
  80         debugmsg("*****Generating data structure nodes*****");
  81         generatedatastructureupdatenodes();
  82         debugmsg("*****Generating compensation nodes*****");
  83         if (!Compiler.OMITCOMP)
  84             generatecompensationnodes();
  85         debugmsg("*****Generating abstract edges*****");
  86         generateabstractedges();
  87         debugmsg("*****Generating scope edges*****");
  88         generatescopeedges();
  89         debugmsg("*****Generating update edges*****");
  90         generateupdateedges();
  91
  92
  93         HashSet superset=new HashSet();
  94         superset.addAll(conjunctions);
  95         HashSet closureset=new HashSet();
  96         debugmsg("Computing closure");
  97         GraphNode.computeclosure(superset,closureset);
  98         try {
  99             GraphNode.DOTVisitor.visit(new FileOutputStream("graph.dot"),superset);
 100         } catch (Exception e) {
 101             e.printStackTrace();
 102             System.exit(-1);
 103         }
 104
 105         generatedebuggraphs();
 106
 107         for(Iterator it=updatenodes.iterator();it.hasNext();) {
 108             GraphNode gn=(GraphNode)it.next();
 109             TermNode tn=(TermNode)gn.getOwner();
 110             MultUpdateNode mun=tn.getUpdate();
 111             System.out.println(gn.getTextLabel());
 112             System.out.println(mun.toString());
 113         }
 114         GraphAnalysis ga=new GraphAnalysis(this);
 115         removedset=ga.doAnalysis();
 116         if (removedset==null) {
 117             System.out.println("Can't generate terminating repair algorithm!");
 118             System.exit(-1);
 119         }
 120
 121         System.out.println("Removing:");
 122         for(Iterator it=removedset.iterator();it.hasNext();) {
 123             GraphNode gn=(GraphNode)it.next();
 124             System.out.println(gn.getTextLabel());
 125         }
 126
 127         superset=new HashSet();
 128         superset.addAll(conjunctions);
 129         superset.removeAll(removedset);
 130         GraphNode.computeclosure(superset,removedset);
 131         try {
 132             GraphNode.DOTVisitor.visit(new FileOutputStream("graphfinal.dot"),superset);
 133         } catch (Exception e) {
 134             e.printStackTrace();
 135             System.exit(-1);
 136         }
 137         constraintdependence.traversedependences(this);
 138     }
 139
 140     void generatedebuggraphs() {
 141         for (int i=0;i<Compiler.debuggraphs.size();i++) {
 142             DebugItem di=(DebugItem) Compiler.debuggraphs.get(i);
 143             HashSet superset=new HashSet();
 144             Constraint constr=(Constraint)state.vConstraints.get(di.constraintnum);
 145
 146             if (di.conjunctionnum==-1) {
 147                 superset.addAll((Set)conjunctionmap.get(constr));
 148             } else {
 149                 DNFConstraint dnf=constr.dnfconstraint;
 150                 superset.add(conjtonodemap.get(dnf.get(di.conjunctionnum)));
 151             }
 152
 153             GraphNode.boundedcomputeclosure(superset,null,di.depth);
 154             try {
 155                 GraphNode.DOTVisitor.visit(new FileOutputStream("graph"+di.constraintnum+"-"+di.depth+(di.conjunctionnum==-1?"":"-"+di.conjunctionnum)+".dot"),superset);
 156             } catch (Exception e) {
 157                 e.printStackTrace();
 158                 System.exit(-1);
 159             }
 160         }
 161     }
 162
 163
 164     /** This method generates a node for each conjunction in the DNF
 165      * form of each constraint.  It also converts the quantifiers into
 166      * conjunctions also - constraints can be satisfied by removing
 167      * items from the sets and relations they are quantified over */
 168
 169     void generateconjunctionnodes() {
 170         Vector constraints=state.vConstraints;
 171         // Constructs conjunction nodes
 172         for(int i=0;i<constraints.size();i++) {
 173             Constraint c=(Constraint)constraints.get(i);
 174             DNFConstraint dnf=c.dnfconstraint;
 175             for(int j=0;j<dnf.size();j++) {
 176                 TermNode tn=new TermNode(c,dnf.get(j));
 177                 GraphNode gn=new GraphNode("Conj"+i+"A"+j,
 178                                            "Conj ("+i+","+j+") "+dnf.get(j).name()
 179                                            ,tn);
 180                 gn.setOption(conjoption);
 181                 conjunctions.add(gn);
 182                 if (!conjunctionmap.containsKey(c))
 183                     conjunctionmap.put(c,new HashSet());
 184                 ((Set)conjunctionmap.get(c)).add(gn);
 185                 conjtonodemap.put(dnf.get(j),gn);
 186             }
 187             // Construct quantifier "conjunction" nodes
 188             for(int j=0;j<c.numQuantifiers();j++) {
 189                 Quantifier q=c.getQuantifier(j);
 190                 if (q instanceof SetQuantifier) {
 191                     SetQuantifier sq=(SetQuantifier)q;
 192                     VarExpr ve=new VarExpr(sq.getVar());
 193                     InclusionPredicate ip=new InclusionPredicate(ve,new SetExpr(sq.getSet()));
 194                     DNFConstraint dconst=new DNFConstraint(ip);
 195                     dconst=dconst.not();
 196                     TermNode tn=new TermNode(c,dconst.get(0));
 197                     tn.setquantifiernode();
 198                     GraphNode gn=new GraphNode("Conj"+i+"AQ"+j,
 199                                                "Conj ("+i+","+j+") "+dconst.get(0).name()
 200                                                ,tn);
 201                     gn.setOption(conjoption);
 202                     conjunctions.add(gn);
 203                     if (!conjunctionmap.containsKey(c))
 204                         conjunctionmap.put(c,new HashSet());
 205                     ((Set)conjunctionmap.get(c)).add(gn);
 206                     conjtonodemap.put(dconst.get(0),gn);
 207
 208                 } else if (q instanceof RelationQuantifier) {
 209                     RelationQuantifier rq=(RelationQuantifier)q;
 210                     VarExpr ve=new VarExpr(rq.y);
 211                     InclusionPredicate ip=new InclusionPredicate(ve,new ImageSetExpr(rq.x,rq.getRelation()));
 212                     DNFConstraint dconst=new DNFConstraint(ip);
 213                     dconst=dconst.not();
 214                     TermNode tn=new TermNode(c,dconst.get(0));
 215                     tn.setquantifiernode();
 216                     GraphNode gn=new GraphNode("Conj"+i+"AQ"+j,
 217                                                "Conj ("+i+","+j+") "+dconst.get(0).name()
 218                                                ,tn);
 219                     gn.setOption(conjoption);
 220                     conjunctions.add(gn);
 221                     if (!conjunctionmap.containsKey(c))
 222                         conjunctionmap.put(c,new HashSet());
 223                     ((Set)conjunctionmap.get(c)).add(gn);
 224                     conjtonodemap.put(dconst.get(0),gn);
 225                 }
 226             }
 227         }
 228     }
 229
 230     void generateupdateedges() {
 231         for(Iterator updateiterator=updatenodes.iterator();updateiterator.hasNext();) {
 232             GraphNode gn=(GraphNode)updateiterator.next();
 233             TermNode tn=(TermNode)gn.getOwner();
 234             MultUpdateNode mun=tn.getUpdate();
 235             for(int i=0;i<mun.numUpdates();i++) {
 236                 UpdateNode un=mun.getUpdate(i);
 237                 for(int j=0;j<un.numUpdates();j++) {
 238                     Updates u=un.getUpdate(j);
 239                     if (u.getType()==Updates.ABSTRACT) {
 240                         Expr e=u.getLeftExpr();
 241                         boolean negated=u.negate;
 242                         if (e instanceof TupleOfExpr) {
 243                             TupleOfExpr toe=(TupleOfExpr)e;
 244                             if (negated) {
 245                                 GraphNode agn=(GraphNode)abstractremove.get(toe.relation);
 246                                 GraphNode.Edge edge=new GraphNode.Edge("requirestupleremove",agn);
 247                                 gn.addEdge(edge);
 248                             } else {
 249                                 GraphNode agn=(GraphNode)abstractadd.get(toe.relation);
 250                                 GraphNode.Edge edge=new GraphNode.Edge("requirestupleadd",agn);
 251                                 gn.addEdge(edge);
 252                             }
 253                         } else if (e instanceof ElementOfExpr) {
 254                             ElementOfExpr eoe=(ElementOfExpr)e;
 255                             if (negated) {
 256                                 GraphNode agn=(GraphNode)abstractremove.get(eoe.set);
 257                                 GraphNode.Edge edge=new GraphNode.Edge("requireselementremove",agn);
 258                                 gn.addEdge(edge);
 259                             } else {
 260                                 GraphNode agn=(GraphNode)abstractadd.get(eoe.set);
 261                                 GraphNode.Edge edge=new GraphNode.Edge("requireselementadd",agn);
 262                                 gn.addEdge(edge);
 263                             }
 264                         } else throw new Error("Unrecognized Abstract Update");
 265                     }
 266                 }
 267             }
 268             /* Cycle through the rules to look for possible conflicts */
 269             for(int i=0;i<state.vRules.size();i++) {
 270                 Rule r=(Rule) state.vRules.get(i);
 271                 if (Compiler.DEBUGGRAPH) {
 272                     System.out.println(gn.getLabel()+"--->"+((GraphNode)scopesatisfy.get(r)).getLabel());
 273                 }
 274                 if (concreteinterferes.interferes(mun,r,true)) {
 275                     GraphNode scopenode=(GraphNode)scopesatisfy.get(r);
 276                     GraphNode.Edge e=new GraphNode.Edge("satisfyscopeinterferes",scopenode);
 277                     gn.addEdge(e);
 278                 }
 279                 if (Compiler.DEBUGGRAPH) {
 280                     System.out.println(gn.getLabel()+"--->"+((GraphNode)scopefalsify.get(r)).getLabel());
 281                 }
 282                 if (concreteinterferes.interferes(mun,r,false)) {
 283                     GraphNode scopenode=(GraphNode)scopefalsify.get(r);
 284                     GraphNode.Edge e=new GraphNode.Edge("falsifyscopeinterferes",scopenode);
 285                     gn.addEdge(e);
 286                 }
 287             }
 288         }
 289     }
 290
 291     void generateabstractedges() {
 292         for(Iterator absiterator=abstractrepair.iterator();absiterator.hasNext();) {
 293             GraphNode gn=(GraphNode)absiterator.next();
 294             TermNode tn=(TermNode)gn.getOwner();
 295             AbstractRepair ar=(AbstractRepair)tn.getAbstract();
 296
 297             for(Iterator conjiterator=conjunctions.iterator();conjiterator.hasNext();) {
 298                 GraphNode gn2=(GraphNode)conjiterator.next();
 299                 TermNode tn2=(TermNode)gn2.getOwner();
 300                 Conjunction conj=tn2.getConjunction();
 301                 Constraint cons=tn2.getConstraint();
 302                 /* See if this is a relation wellformedness constraint
 303                    that is trivially satisfied. */
 304                 if (abstractinterferes.checkrelationconstraint(ar, cons))
 305                     continue;
 306                 if (AbstractInterferes.interferesquantifier(ar,cons)) {
 307                     GraphNode.Edge e=new GraphNode.Edge("interferesquantifier",gn2);
 308                     gn.addEdge(e);
 309                 } else {
 310                     for(int i=0;i<conj.size();i++) {
 311                         DNFPredicate dp=conj.get(i);
 312
 313                         if (!abstractinterferes.interfereswithpredicate(ar,dp))
 314                             continue;
 315                         if (getConstraint(gn)==null||
 316                             !abstractinterferes.interferemodifies(ar,getConstraint(gn),dp,cons)) {
 317                             GraphNode.Edge e=new GraphNode.Edge("interferesmodify",gn2);
 318                             gn.addEdge(e);
 319                             break;
 320                         }
 321                     }
 322                 }
 323             }
 324             for(Iterator scopeiterator=scopenodes.iterator();scopeiterator.hasNext();) {
 325                 GraphNode gn2=(GraphNode)scopeiterator.next();
 326                 TermNode tn2=(TermNode)gn2.getOwner();
 327                 ScopeNode sn2=tn2.getScope();
 328                 if (AbstractInterferes.interfereswithrule(ar,sn2.getRule(),sn2.getSatisfy())) {
 329                     GraphNode.Edge e=new GraphNode.Edge("interfereswithrule",gn2);
 330                     gn.addEdge(e);
 331                 }
 332             }
 333         }
 334     }
 335
 336     Constraint getConstraint(GraphNode gn) {
 337         for(Iterator it=gn.inedges();it.hasNext();) {
 338             GraphNode.Edge e=(GraphNode.Edge)it.next();
 339             GraphNode gnsource=e.getSource();
 340             TermNode tnsource=(TermNode)gnsource.getOwner();
 341             if (tnsource.getType()==TermNode.CONJUNCTION) {
 342                 return tnsource.getConstraint();
 343             }
 344         }
 345         return null;
 346     }
 347
 348     void generatescopenodes() {
 349         for(int i=0;i<state.vRules.size();i++) {
 350             Rule r=(Rule) state.vRules.get(i);
 351             ScopeNode satisfy=new ScopeNode(r,true);
 352             TermNode tnsatisfy=new TermNode(satisfy);
 353             GraphNode gnsatisfy=new GraphNode("SatisfyRule"+i,tnsatisfy);
 354             gnsatisfy.setOption(scopeoption);
 355             if (Compiler.MERGENODES)
 356                 gnsatisfy.setMerge();
 357             ConsequenceNode cnsatisfy=new ConsequenceNode();
 358             TermNode ctnsatisfy=new TermNode(cnsatisfy);
 359             GraphNode cgnsatisfy=new GraphNode("ConseqSatisfyRule"+i,ctnsatisfy);
 360             cgnsatisfy.setOption(conseqoption);
 361             consequence.put(satisfy,cgnsatisfy);
 362             GraphNode.Edge esat=new GraphNode.Edge("consequencesatisfy"+i,cgnsatisfy);
 363             gnsatisfy.addEdge(esat);
 364             consequencenodes.add(cgnsatisfy);
 365             scopesatisfy.put(r,gnsatisfy);
 366             scopenodes.add(gnsatisfy);
 367
 368             ScopeNode falsify=new ScopeNode(r,false);
 369             TermNode tnfalsify=new TermNode(falsify);
 370             GraphNode gnfalsify=new GraphNode("FalsifyRule"+i,tnfalsify);
 371             gnfalsify.setOption(scopeoption);
 372             if (Compiler.MERGENODES)
 373                 gnfalsify.setMerge();
 374             ConsequenceNode cnfalsify=new ConsequenceNode();
 375             TermNode ctnfalsify=new TermNode(cnfalsify);
 376             GraphNode cgnfalsify=new GraphNode("ConseqFalsifyRule"+i,ctnfalsify);
 377             cgnfalsify.setOption(conseqoption);
 378             consequence.put(falsify,cgnfalsify);
 379             GraphNode.Edge efals=new GraphNode.Edge("consequencefalsify"+i,cgnfalsify);
 380             gnfalsify.addEdge(efals);
 381             consequencenodes.add(cgnfalsify);
 382             scopefalsify.put(r,gnfalsify);
 383             scopenodes.add(gnfalsify);
 384         }
 385     }
 386
 387     void generatescopeedges() {
 388         for(Iterator scopeiterator=scopenodes.iterator();scopeiterator.hasNext();) {
 389             GraphNode gn=(GraphNode)scopeiterator.next();
 390             TermNode tn=(TermNode)gn.getOwner();
 391             ScopeNode sn=tn.getScope();
 392
 393             /* Interference edges with conjunctions */
 394             for(Iterator conjiterator=conjunctions.iterator();conjiterator.hasNext();) {
 395                 GraphNode gn2=(GraphNode)conjiterator.next();
 396                 TermNode tn2=(TermNode)gn2.getOwner();
 397                 Conjunction conj=tn2.getConjunction();
 398                 Constraint constr=tn2.getConstraint();
 399                 for(int i=0;i<conj.size();i++) {
 400                     DNFPredicate dp=conj.get(i);
 401                     if (abstractinterferes.scopeinterfereswithpredicate(sn,dp)||
 402                         AbstractInterferes.interfereswithquantifier(sn.getDescriptor(),sn.getSatisfy(),constr)) {
 403                         GraphNode.Edge e=new GraphNode.Edge("interferesconjunction",gn2);
 404                         GraphNode gnconseq=(GraphNode)consequence.get(sn);
 405                         gnconseq.addEdge(e);
 406                         break;
 407                     }
 408                 }
 409             }
 410
 411             /* Now see if this could effect other model defintion rules */
 412             for(int i=0;i<state.vRules.size();i++) {
 413                 Rule r=(Rule) state.vRules.get(i);
 414                 if (AbstractInterferes.interfereswithrule(sn.getDescriptor(),sn.getSatisfy(),r,true)) {
 415                     GraphNode scopenode=(GraphNode)scopesatisfy.get(r);
 416                     GraphNode.Edge e=new GraphNode.Edge("interferesscopesatisfy2",scopenode);
 417                     GraphNode gnconseq=(GraphNode)consequence.get(sn);
 418                     gnconseq.addEdge(e);
 419                 }
 420                 if (AbstractInterferes.interfereswithrule(sn.getDescriptor(),sn.getSatisfy(),r,false)) {
 421                     GraphNode scopenode=(GraphNode)scopefalsify.get(r);
 422                     GraphNode.Edge e=new GraphNode.Edge("interferesscopefalsify2",scopenode);
 423                     GraphNode gnconseq=(GraphNode)consequence.get(sn);
 424                     gnconseq.addEdge(e);
 425                 }
 426             }
 427         }
 428     }
 429
 430     /** This method generates the abstract repair nodes. */
 431     void generaterepairnodes() {
 432         /* Generate repairs of conjunctions */
 433         for(Iterator conjiterator=conjunctions.iterator();conjiterator.hasNext();) {
 434             GraphNode gn=(GraphNode)conjiterator.next();
 435             TermNode tn=(TermNode)gn.getOwner();
 436             Conjunction conj=tn.getConjunction();
 437         loop:
 438             for(int i=0;i<conj.size();i++) {
 439                 DNFPredicate dp=conj.get(i);
 440                 int[] array=dp.getPredicate().getRepairs(dp.isNegated(),this);
 441                 Descriptor d=dp.getPredicate().getDescriptor();
 442                 if ((dp.getPredicate() instanceof ExprPredicate)&&
 443                     (((ExprPredicate)dp.getPredicate()).getType()==ExprPredicate.SIZE)) {
 444                     boolean neg=dp.isNegated();
 445                     Opcode op=((ExprPredicate)dp.getPredicate()).getOp();
 446                     int size=((ExprPredicate)dp.getPredicate()).rightSize();
 447                     op=Opcode.translateOpcode(neg,op);
 448                     if (((size==1)&&(op==Opcode.EQ))||
 449                         ((size!=1)&&(op==Opcode.NE))||
 450                         ((size<=1)&&(op==Opcode.GE))||
 451                         ((size<1)&&(op==Opcode.GT))||
 452                         ((size>1)&&(op==Opcode.LT))||
 453                         ((size>=1)&&(op==Opcode.LE))) {
 454                         for(int i2=0;i2<conj.size();i2++) {
 455                             DNFPredicate dp2=conj.get(i2);
 456                             if ((dp2.getPredicate() instanceof ExprPredicate)&&
 457                                 (((ExprPredicate)dp2.getPredicate()).getType()==ExprPredicate.COMPARISON)) {
 458                                 if (equivalent(((SizeofExpr)((OpExpr)((ExprPredicate)dp.getPredicate()).expr).left).setexpr,
 459                                                (RelationExpr)((OpExpr)((ExprPredicate)dp2.getPredicate()).expr).left))
 460                                     continue loop; // comparison predicate ensure that size expr is true - no need to generate abstract repairs...
 461                             }
 462                         }
 463                     }
 464                 }
 465
 466                 for(int j=0;j<array.length;j++) {
 467                     if (array[j]==AbstractRepair.ADDTOSET) {
 468
 469                         System.out.println("1");
 470                         if ((dp.getPredicate() instanceof ExprPredicate)&&
 471                             (((ExprPredicate)dp.getPredicate()).getType()==ExprPredicate.SIZE)) {
 472                             System.out.println("2");
 473                             boolean neg=dp.isNegated();
 474                             Opcode op=((ExprPredicate)dp.getPredicate()).getOp();
 475                             int size=((ExprPredicate)dp.getPredicate()).rightSize();
 476                             op=Opcode.translateOpcode(neg,op);
 477                             Descriptor des=((ExprPredicate)dp.getPredicate()).getDescriptor();
 478                             if (des instanceof SetDescriptor) {
 479                                 System.out.println("3");
 480
 481                                 int minsize=exactsize.minSize((SetDescriptor)des);
 482                                 Constraint reqc=exactsize.ensuresMinSize((SetDescriptor)des);
 483                                 if (((size==minsize)&&(op==Opcode.EQ))||
 484                                     ((size<=minsize)&&(op==Opcode.GE))||
 485                                     ((size<minsize)&&(op==Opcode.GT))) {
 486                                     System.out.println("4");
 487                                     constraintdependence.requiresConstraint(gn,reqc);
 488                                     //force good ordering
 489                                     continue; //no repair action needed here...
 490                                 }
 491                             }
 492                         }
 493                     }
 494
 495                     AbstractRepair ar=new AbstractRepair(dp,array[j],d,sources);
 496                     TermNode tn2=new TermNode(ar);
 497                     //              GraphNode gn2=new GraphNode(gn.getLabel()+"A"+i+"B"+ar.type(),gn.getTextLabel()+" #"+i+" "+ar.type(),tn2);
 498                     GraphNode gn2=new GraphNode(gn.getLabel()+"A"+i+"B"+ar.type(),dp.name()+" "+ar.type(),tn2);
 499                     gn2.setOption(absrepoption);
 500                     GraphNode.Edge e=new GraphNode.Edge("abstractedge1",gn2);
 501                     gn.addEdge(e);
 502                     if (!predtoabstractmap.containsKey(dp))
 503                         predtoabstractmap.put(dp,new HashSet());
 504                     ((Set)predtoabstractmap.get(dp)).add(gn2);
 505                     abstractrepair.add(gn2);
 506                 }
 507             }
 508         }
 509         /* Generate additional abstract repairs */
 510         Vector setdescriptors=state.stSets.getAllDescriptors();
 511         for(int i=0;i<setdescriptors.size();i++) {
 512             SetDescriptor sd=(SetDescriptor)setdescriptors.get(i);
 513
 514             VarExpr ve=new VarExpr("DUMMY");
 515             InclusionPredicate ip=new InclusionPredicate(ve,new SetExpr(sd));
 516             DNFPredicate tp=new DNFPredicate(false,ip);
 517             AbstractRepair ar=new AbstractRepair(tp, AbstractRepair.ADDTOSET, sd,sources);
 518             TermNode tn=new TermNode(ar);
 519             GraphNode gn=new GraphNode("AbstractAddSetRule"+i,tn);
 520             gn.setOption(absrepoption);
 521             if (!predtoabstractmap.containsKey(tp))
 522                 predtoabstractmap.put(tp,new HashSet());
 523             ((Set)predtoabstractmap.get(tp)).add(gn);
 524             abstractrepair.add(gn);
 525             abstractrepairadd.add(gn);
 526             abstractadd.put(sd,gn);
 527
 528             DNFPredicate tp2=new DNFPredicate(true,ip);
 529             AbstractRepair ar2=new AbstractRepair(tp2, AbstractRepair.REMOVEFROMSET, sd,sources);
 530             TermNode tn2=new TermNode(ar2);
 531             GraphNode gn2=new GraphNode("AbstractRemSetRule"+i,tn2);
 532             gn2.setOption(absrepoption);
 533             if (!predtoabstractmap.containsKey(tp2))
 534                 predtoabstractmap.put(tp2,new HashSet());
 535             ((Set)predtoabstractmap.get(tp2)).add(gn2);
 536             abstractrepair.add(gn2);
 537             abstractrepairadd.add(gn2);
 538             abstractremove.put(sd,gn2);
 539         }
 540
 541         Vector relationdescriptors=state.stRelations.getAllDescriptors();
 542         for(int i=0;i<relationdescriptors.size();i++) {
 543             RelationDescriptor rd=(RelationDescriptor)relationdescriptors.get(i);
 544             VarDescriptor vd1=new VarDescriptor("DUMMY1");
 545             VarExpr ve2=new VarExpr("DUMMY2");
 546
 547             InclusionPredicate ip=new InclusionPredicate(ve2,new ImageSetExpr(vd1, rd));
 548
 549             DNFPredicate tp=new DNFPredicate(false,ip);
 550             AbstractRepair ar=new AbstractRepair(tp, AbstractRepair.ADDTORELATION, rd,sources);
 551             TermNode tn=new TermNode(ar);
 552             GraphNode gn=new GraphNode("AbstractAddRelRule"+i,tn);
 553             gn.setOption(absrepoption);
 554             if (!predtoabstractmap.containsKey(tp))
 555                 predtoabstractmap.put(tp,new HashSet());
 556             ((Set)predtoabstractmap.get(tp)).add(gn);
 557             abstractrepair.add(gn);
 558             abstractrepairadd.add(gn);
 559             abstractadd.put(rd,gn);
 560
 561             DNFPredicate tp2=new DNFPredicate(true,ip);
 562             AbstractRepair ar2=new AbstractRepair(tp2, AbstractRepair.REMOVEFROMRELATION, rd,sources);
 563             TermNode tn2=new TermNode(ar2);
 564             GraphNode gn2=new GraphNode("AbstractRemRelRule"+i,tn2);
 565             gn2.setOption(absrepoption);
 566             if (!predtoabstractmap.containsKey(tp2))
 567                 predtoabstractmap.put(tp2,new HashSet());
 568             ((Set)predtoabstractmap.get(tp2)).add(gn2);
 569             abstractrepair.add(gn2);
 570             abstractrepairadd.add(gn2);
 571             abstractremove.put(rd,gn2);
 572         }
 573     }
 574
 575     int compensationcount=0;
 576     void generatecompensationnodes() {
 577         for(int i=0;i<state.vRules.size();i++) {
 578             Rule r=(Rule) state.vRules.get(i);
 579             Vector possiblerules=new Vector();
 580
 581             for(int j=0;j<(r.numQuantifiers()+r.getDNFNegGuardExpr().size());j++) {
 582                 GraphNode gn=(GraphNode)scopesatisfy.get(r);
 583                 TermNode tn=(TermNode) gn.getOwner();
 584                 ScopeNode sn=tn.getScope();
 585                 MultUpdateNode mun=new MultUpdateNode(sn);
 586                 TermNode tn2=new TermNode(mun);
 587                 GraphNode gn2=new GraphNode("CompRem"+compensationcount,tn2);
 588                 gn2.setOption(compoption);
 589                 UpdateNode un=new UpdateNode(r);
 590
 591                 if (j<r.numQuantifiers()) {
 592                     /* Remove quantifier */
 593                     Quantifier q=r.getQuantifier(j);
 594                     if (q instanceof RelationQuantifier) {
 595                         RelationQuantifier rq=(RelationQuantifier)q;
 596                         TupleOfExpr toe=new TupleOfExpr(new VarExpr(rq.x),new VarExpr(rq.y),rq.relation);
 597                         toe.td=ReservedTypeDescriptor.INT;
 598                         Updates u=new Updates(toe,true);
 599                         un.addUpdate(u);
 600                         if (abstractremove.containsKey(rq.relation)) {
 601                             GraphNode agn=(GraphNode)abstractremove.get(rq.relation);
 602                             GraphNode.Edge e=new GraphNode.Edge("requiresremove1",agn);
 603                             gn2.addEdge(e);
 604                         } else {
 605                             continue; /* Abstract repair doesn't exist */
 606                         }
 607                     } else if (q instanceof SetQuantifier) {
 608                         SetQuantifier sq=(SetQuantifier)q;
 609                         ElementOfExpr eoe=new ElementOfExpr(new VarExpr(sq.var),sq.set);
 610                         eoe.td=ReservedTypeDescriptor.INT;
 611                         Updates u=new Updates(eoe,true);
 612                         un.addUpdate(u);
 613                         if (abstractremove.containsKey(sq.set)) {
 614                             GraphNode agn=(GraphNode)abstractremove.get(sq.set);
 615                             GraphNode.Edge e=new GraphNode.Edge("requiresremove2",agn);
 616                             gn2.addEdge(e);
 617                         } else {
 618                             continue; /* Abstract repair doesn't exist */
 619                         }
 620                     } else {
 621                         continue;
 622                     }
 623                 } else {
 624                     /* Negate conjunction */
 625                     int c=j-r.numQuantifiers();
 626                     if (!processconjunction(un,r.getDNFNegGuardExpr().get(c),null)) {
 627                         continue;
 628                     }
 629                 }
 630                 if (!un.checkupdates()) /* Make sure we have a good update */
 631                     continue;
 632
 633                 mun.addUpdate(un);
 634                 GraphNode.Edge e=new GraphNode.Edge("abstractcomp"+compensationcount,gn2);
 635                 compensationcount++;
 636                 gn.addEdge(e);
 637                 updatenodes.add(gn2);
 638             }
 639         }
 640     }
 641
 642     void generatedatastructureupdatenodes() {
 643         for(Iterator absiterator=abstractrepair.iterator();absiterator.hasNext();) {
 644             GraphNode gn=(GraphNode)absiterator.next();
 645             System.out.println("Analysing: "+gn.getTextLabel());
 646             TermNode tn=(TermNode) gn.getOwner();
 647             AbstractRepair ar=tn.getAbstract();
 648             if (ar.getType()==AbstractRepair.ADDTOSET) {
 649                 generateaddtosetrelation(gn,ar);
 650             } else if (ar.getType()==AbstractRepair.REMOVEFROMSET) {
 651                 generateremovefromsetrelation(gn,ar);
 652             } else if (ar.getType()==AbstractRepair.ADDTORELATION) {
 653                 generateaddtosetrelation(gn,ar);
 654             } else if (ar.getType()==AbstractRepair.REMOVEFROMRELATION) {
 655                 generateremovefromsetrelation(gn,ar);
 656             } else if (ar.getType()==AbstractRepair.MODIFYRELATION) {
 657                 /* Generate remove/add pairs */
 658                 if (ar.needsRemoves(state))
 659                     generateremovefromsetrelation(gn,ar);
 660                 generateaddtosetrelation(gn,ar);
 661                 /* Generate atomic modify */
 662                 generatemodifyrelation(gn,ar);
 663             }
 664         }
 665     }
 666
 667
 668     /** This method generates concrete data structure updates which
 669      * remove an object (or tuple) from a set (or relation).*/
 670
 671     int removefromcount=0;
 672     void generateremovefromsetrelation(GraphNode gn,AbstractRepair ar) {
 673         /* Construct the set of all rules which could add something to the given set or relation */
 674
 675         Vector possiblerules=new Vector();
 676         for(int i=0;i<state.vRules.size();i++) {
 677             Rule r=(Rule) state.vRules.get(i);
 678             if ((r.getInclusion() instanceof SetInclusion)&&
 679                 (ar.getDescriptor()==((SetInclusion)r.getInclusion()).getSet()))
 680                 possiblerules.add(r);
 681             if ((r.getInclusion() instanceof RelationInclusion)&&
 682                 (ar.getDescriptor()==((RelationInclusion)r.getInclusion()).getRelation()))
 683                 possiblerules.add(r);
 684         }
 685         if (possiblerules.size()==0)
 686             return;
 687
 688         /* Loop through different ways of falsifying each of these rules */
 689         int[] count=new int[possiblerules.size()];
 690         while(remains(count,possiblerules,true)) {
 691             MultUpdateNode mun=new MultUpdateNode(ar,MultUpdateNode.REMOVE);
 692             TermNode tn=new TermNode(mun);
 693             GraphNode gn2=new GraphNode("UpdateRem"+removefromcount,tn);
 694             gn2.setOption(updateoption);
 695
 696             boolean goodflag=true;
 697             for(int i=0;i<possiblerules.size();i++) {
 698                 Rule r=(Rule)possiblerules.get(i);
 699                 UpdateNode un=new UpdateNode(r);
 700
 701                 if (count[i]<r.numQuantifiers()) {
 702                     /* Remove quantifier */
 703                     Quantifier q=r.getQuantifier(count[i]);
 704                     if (q instanceof RelationQuantifier) {
 705                         RelationQuantifier rq=(RelationQuantifier)q;
 706                         TupleOfExpr toe=new TupleOfExpr(new VarExpr(rq.x),new VarExpr(rq.y),rq.relation);
 707                         toe.td=ReservedTypeDescriptor.INT;
 708                         Updates u=new Updates(toe,true);
 709                         un.addUpdate(u);
 710                         if (abstractremove.containsKey(rq.relation)) {
 711                             GraphNode agn=(GraphNode)abstractremove.get(rq.relation);
 712                             GraphNode.Edge e=new GraphNode.Edge("requiresremove3",agn);
 713                             gn2.addEdge(e);
 714                         } else {
 715                             goodflag=false;break; /* Abstract repair doesn't exist */
 716                         }
 717                     } else if (q instanceof SetQuantifier) {
 718                         SetQuantifier sq=(SetQuantifier)q;
 719                         ElementOfExpr eoe=new ElementOfExpr(new VarExpr(sq.var),sq.set);
 720                         eoe.td=ReservedTypeDescriptor.INT;
 721                         Updates u=new Updates(eoe,true);
 722                         un.addUpdate(u);
 723                         if (abstractremove.containsKey(sq.set)) {
 724                             GraphNode agn=(GraphNode)abstractremove.get(sq.set);
 725                             GraphNode.Edge e=new GraphNode.Edge("requiresremove4",agn);
 726                             gn2.addEdge(e);
 727                         } else {
 728                             goodflag=false;break; /* Abstract repair doesn't exist */
 729                         }
 730                     } else {goodflag=false;break;}
 731                 } else {
 732                     int c=count[i]-r.numQuantifiers();
 733                     if (!processconjunction(un,r.getDNFNegGuardExpr().get(c),null)) {
 734                         goodflag=false;break;
 735                     }
 736                 }
 737                 if (!un.checkupdates()) {
 738                     goodflag=false;
 739                     break;
 740                 }
 741                 mun.addUpdate(un);
 742             }
 743             if (goodflag) {
 744                 GraphNode.Edge e=new GraphNode.Edge("abstract3"+(removefromcount++),gn2);
 745                 gn.addEdge(e);
 746                 updatenodes.add(gn2);
 747             }
 748             increment(count,possiblerules,true);
 749         }
 750     }
 751
 752     /** This method increments to the next possibility. */
 753
 754     static private void increment(int count[], Vector rules,boolean isremove) {
 755         count[0]++;
 756         for(int i=0;i<(rules.size()-1);i++) {
 757             int num=isremove?(((Rule)rules.get(i)).numQuantifiers()+(((Rule)rules.get(i)).getDNFNegGuardExpr().size())):((Rule)rules.get(i)).getDNFGuardExpr().size();
 758             if (count[i]>=num) {
 759                 count[i+1]++;
 760                 count[i]=0;
 761             } else break;
 762         }
 763     }
 764
 765
 766     /** This method test if there remain any possibilities to loop
 767      * through. */
 768     static private boolean remains(int count[], Vector rules, boolean isremove) {
 769         for(int i=0;i<rules.size();i++) {
 770             int num=isremove?(((Rule)rules.get(i)).numQuantifiers()+(((Rule)rules.get(i)).getDNFNegGuardExpr().size())):((Rule)rules.get(i)).getDNFGuardExpr().size();
 771             if (count[i]>=num) {
 772                 return false;
 773             }
 774         }
 775         return true;
 776     }
 777
 778     /** This method generates data structure updates to implement the
 779      *  abstract atomic modification specified by ar. */
 780
 781     int modifycount=0;
 782     void generatemodifyrelation(GraphNode gn, AbstractRepair ar) {
 783         RelationDescriptor rd=(RelationDescriptor)ar.getDescriptor();
 784         ExprPredicate exprPredicate=(ExprPredicate)ar.getPredicate().getPredicate();
 785         boolean inverted=exprPredicate.inverted();
 786         int leftindex=0;
 787         int rightindex=1;
 788         if (inverted)
 789             leftindex=2;
 790         else
 791             rightindex=2;
 792
 793         // construct set of possible rules
 794         Vector possiblerules=new Vector();
 795         for(int i=0;i<state.vRules.size();i++) {
 796             Rule r=(Rule) state.vRules.get(i);
 797             if ((r.getInclusion() instanceof RelationInclusion)&&
 798                 (rd==((RelationInclusion)r.getInclusion()).getRelation()))
 799                 possiblerules.add(r);
 800         }
 801         if (possiblerules.size()==0)
 802             return;
 803
 804         // increment through this set
 805         int[] count=new int[possiblerules.size()];
 806         while(remains(count,possiblerules,false)) {
 807             MultUpdateNode mun=new MultUpdateNode(ar,MultUpdateNode.MODIFY);
 808             TermNode tn=new TermNode(mun);
 809             GraphNode gn2=new GraphNode("UpdateMod"+modifycount,tn);
 810             gn2.setOption(updateoption);
 811
 812             boolean goodflag=true;
 813             for(int i=0;i<possiblerules.size();i++) {
 814                 Rule r=(Rule)possiblerules.get(i);
 815                 UpdateNode un=new UpdateNode(r);
 816
 817                 int c=count[i];
 818                 if (!processconjunction(un,r.getDNFGuardExpr().get(c),null)) {
 819                     goodflag=false;break;
 820                 }
 821                 RelationInclusion ri=(RelationInclusion)r.getInclusion();
 822                 if (!(ri.getLeftExpr() instanceof VarExpr)) {
 823                     if (ri.getLeftExpr().isValue(ri.getRelation().getDomain().getType())) {
 824                         Updates up=new Updates(ri.getLeftExpr(),leftindex,ri.getRelation().getDomain().getType());
 825                         un.addUpdate(up);
 826                     } else {
 827                         if (inverted)
 828                             goodflag=false;
 829                         else un.addInvariant(ri.getLeftExpr());
 830                     }
 831                 } else {
 832                     VarDescriptor vd=((VarExpr)ri.getLeftExpr()).getVar();
 833                     if (vd.isGlobal()) {
 834                         Updates up=new Updates(ri.getLeftExpr(),leftindex,null);
 835                         un.addUpdate(up);
 836                     } else if (inverted)
 837                         goodflag=false;
 838                 }
 839                 if (!(ri.getRightExpr() instanceof VarExpr)) {
 840                     if (ri.getRightExpr().isValue(ri.getRelation().getRange().getType())) {
 841                         Updates up=new Updates(ri.getRightExpr(),rightindex,ri.getRelation().getRange().getType());
 842                         un.addUpdate(up);
 843                     } else {
 844                         if (!inverted)
 845                             goodflag=false;
 846                         else
 847                             un.addInvariant(ri.getLeftExpr());
 848                     }
 849                 } else {
 850                     VarDescriptor vd=((VarExpr)ri.getRightExpr()).getVar();
 851                     if (vd.isGlobal()) {
 852                         Updates up=new Updates(ri.getRightExpr(),rightindex,null);
 853                         un.addUpdate(up);
 854                     } else if (!inverted)
 855                         goodflag=false;
 856                 }
 857
 858                 if (!un.checkupdates()) {
 859                     goodflag=false;
 860                     break;
 861                 }
 862                 mun.addUpdate(un);
 863             }
 864             if (goodflag) {
 865                 GraphNode.Edge e=new GraphNode.Edge("abstract4"+modifycount,gn2);
 866                 modifycount++;
 867                 gn.addEdge(e);
 868                 updatenodes.add(gn2);
 869             }
 870             increment(count,possiblerules,false);
 871         }
 872     }
 873
 874     /** Generate concrete data structure update to add an object(or
 875      * tuple) to a set (or relation). */
 876
 877     static int addtocount=0;
 878     void generateaddtosetrelation(GraphNode gn, AbstractRepair ar) {
 879         for(int i=0;i<state.vRules.size();i++) {
 880             Rule r=(Rule) state.vRules.get(i);
 881
 882
 883             /* See if this is a good rule*/
 884             if ((r.getInclusion() instanceof SetInclusion&&
 885                  ar.getDescriptor()==((SetInclusion)r.getInclusion()).getSet())||
 886                 (r.getInclusion() instanceof RelationInclusion&&
 887                  ar.getDescriptor()==((RelationInclusion)r.getInclusion()).getRelation())) {
 888
 889                 /* First solve for quantifiers */
 890                 Vector bindings=new Vector();
 891                 /* Construct bindings */
 892
 893                 Hashtable setmapping=new Hashtable();
 894                 System.out.println("Attempting to construct bindings");
 895
 896                 if (!constructbindings(bindings,r,ar,setmapping,false))
 897                     continue;
 898                 System.out.println("Bindings constructed");
 899                 //Generate add instruction
 900                 DNFRule dnfrule=r.getDNFGuardExpr();
 901                  endloop:
 902                 for(int j=0;j<dnfrule.size();j++) {
 903                     Inclusion inc=r.getInclusion();
 904                     UpdateNode un=new UpdateNode(r);
 905                     un.addBindings(bindings);
 906                     /* Now build update for tuple/set inclusion condition */
 907                     if(inc instanceof SetInclusion) {
 908                         SetInclusion si=(SetInclusion)inc;
 909                         Expr e=si.elementexpr;
 910
 911                         while(e instanceof CastExpr) {
 912                             CastExpr ce=(CastExpr)e;
 913                             if (ce.getType()!=si.getSet().getType())
 914                                 continue endloop;
 915                             e=ce.getExpr();
 916                         }
 917
 918                         if (!(e instanceof VarExpr)) {
 919                             if (e.isValue(si.getSet().getType())) {
 920                                 Updates up=new Updates(e,0,si.getSet().getType());
 921                                 un.addUpdate(up);
 922                             } else {
 923                                 /* We're an add to set*/
 924                                 ArrayAnalysis.AccessPath rap=arrayanalysis.analyzeExpr(r,e);
 925                                 SetDescriptor set=sources.setSource(si.getSet())?
 926                                     sources.getSourceSet(si.getSet()):null;
 927                                 if (set==null)
 928                                     continue;
 929                                 ArrayAnalysis.AccessPath ap=arrayanalysis.getSet(set);
 930                                 if (rap==ArrayAnalysis.AccessPath.NONE)
 931                                     continue;
 932                                 if (!rap.equal(ap))
 933                                     continue;
 934                                 if (!constructarrayupdate(un, e, rap, 0))
 935                                     continue;
 936                             }
 937                         } else {
 938                             VarDescriptor vd=((VarExpr)e).getVar();
 939                             if (vd.isGlobal()) {
 940                                 Updates up=new Updates(e,0,null);
 941                                 un.addUpdate(up);
 942                             }
 943                         }
 944                     } else if (inc instanceof RelationInclusion) {
 945                         RelationInclusion ri=(RelationInclusion)inc;
 946
 947                         Expr e=ri.getLeftExpr();
 948
 949                         while(e instanceof CastExpr) {
 950                             CastExpr ce=(CastExpr)e;
 951                             if (ce.getType()!=ri.getRelation().getDomain().getType())
 952                                 continue endloop;
 953                             e=ce.getExpr();
 954                         }
 955                         if (!(e instanceof VarExpr)) {
 956                             if (e.isValue(ri.getRelation().getDomain().getType())) {
 957                                 Updates up=new Updates(e,0,ri.getRelation().getDomain().getType());
 958                                 if (ar.getDomainSet()!=null)
 959                                     setmapping.put(e,ar.getDomainSet());
 960                                 un.addUpdate(up);
 961                             } else {
 962                                 /* We don't handly relation modifies */
 963                                 if (ar.getType()==AbstractRepair.MODIFYRELATION)
 964                                     continue;
 965                                 /* We're an add to relation*/
 966                                 ArrayAnalysis.AccessPath rap=arrayanalysis.analyzeExpr(r,e);
 967                                 SetDescriptor set=sources.relsetSource(ri.getRelation(),true /* Domain*/)?
 968                                     sources.relgetSourceSet(ri.getRelation(),true):null;
 969                                 if (set==null)
 970                                     continue;
 971                                 ArrayAnalysis.AccessPath ap=arrayanalysis.getSet(set);
 972                                 if (rap==ArrayAnalysis.AccessPath.NONE||
 973                                     !rap.equal(ap)||
 974                                     !constructarrayupdate(un, e, rap, 0))
 975                                     continue;
 976                                 if (ar.getDomainSet()!=null)
 977                                     setmapping.put(e,ar.getDomainSet());
 978
 979                             }
 980                         } else {
 981                             VarDescriptor vd=((VarExpr)e).getVar();
 982                             if (vd.isGlobal()) {
 983                                 Updates up=new Updates(e,0,null);
 984                                 if (ar.getDomainSet()!=null)
 985                                     setmapping.put(e,ar.getDomainSet());
 986                                 un.addUpdate(up);
 987                             }
 988                         }
 989
 990                         e=ri.getRightExpr();
 991
 992                         while(e instanceof CastExpr) {
 993                             CastExpr ce=(CastExpr)e;
 994                             if (ce.getType()!=ri.getRelation().getRange().getType())
 995                                 continue endloop;
 996                             e=ce.getExpr();
 997                         }
 998                         if (!(e instanceof VarExpr)) {
 999                             if (e.isValue(ri.getRelation().getRange().getType())) {
1000                                 Updates up=new Updates(e,1,ri.getRelation().getRange().getType());
1001                                 un.addUpdate(up);
1002                             } else {
1003                                 /* We don't handly relation modifies */
1004                                 if (ar.getType()==AbstractRepair.MODIFYRELATION)
1005                                     continue;
1006                                 /* We're an add to relation*/
1007                                 ArrayAnalysis.AccessPath rap=arrayanalysis.analyzeExpr(r,e);
1008                                 SetDescriptor set=sources.relsetSource(ri.getRelation(),false /* Range*/)?
1009                                     sources.relgetSourceSet(ri.getRelation(),false):null;
1010                                 if (set==null)
1011                                     continue;
1012                                 ArrayAnalysis.AccessPath ap=arrayanalysis.getSet(set);
1013
1014                                 if (rap==ArrayAnalysis.AccessPath.NONE||
1015                                     !rap.equal(ap)||
1016                                     !constructarrayupdate(un, e, rap, 1))
1017                                     continue;
1018                                 if (ar.getRangeSet()!=null)
1019                                     setmapping.put(e,ar.getRangeSet());
1020                             }
1021                         } else {
1022                             VarDescriptor vd=((VarExpr)e).getVar();
1023                             if (vd.isGlobal()) {
1024                                 Updates up=new Updates(e,1,null);
1025                                 if (ar.getRangeSet()!=null)
1026                                     setmapping.put(e,ar.getRangeSet());
1027                                 un.addUpdate(up);
1028                             }
1029                         }
1030                     }
1031                     System.out.println("Built inclusion condition updates.");
1032                     //Finally build necessary updates to satisfy conjunction
1033                     RuleConjunction ruleconj=dnfrule.get(j);
1034
1035                     /* Add in updates for quantifiers */
1036                     MultUpdateNode mun=new MultUpdateNode(ar,MultUpdateNode.ADD);
1037                     TermNode tn=new TermNode(mun);
1038                     GraphNode gn2=new GraphNode("UpdateAdd"+addtocount,tn);
1039                     gn2.setOption(updateoption);
1040
1041                     if (debugmsg("Start processing quantifiers")&&
1042                         processquantifiers(gn2,un, r,setmapping)&&
1043                         debugmsg("Finished processing quantifiers")&&
1044                         processconjunction(un,ruleconj,setmapping)&&
1045                         debugmsg("Finished processing conjunction")&&
1046                         un.checkupdates()&&
1047                         debugmsg("Updates checked")) {
1048                         mun.addUpdate(un);
1049                         GraphNode.Edge e=new GraphNode.Edge("abstract5"+addtocount,gn2);
1050                         addtocount++;
1051                         gn.addEdge(e);
1052                         updatenodes.add(gn2);
1053                     }
1054                 }
1055             }
1056         }
1057     }
1058
1059     boolean debugmsg(String st) {
1060         System.out.println(st);
1061         return true;
1062     }
1063
1064     boolean constructarrayupdate(UpdateNode un, Expr lexpr, ArrayAnalysis.AccessPath ap, int slotnumber) {
1065         System.out.println("Constructing array update");
1066         Expr e=null;
1067         for (int i=ap.numFields()-1;i>=0;i--) {
1068             if (e==null)
1069                 e=lexpr;
1070             else
1071                 e=((DotExpr)e).getExpr();
1072
1073             while (e instanceof CastExpr)
1074                 e=((CastExpr)e).getExpr();
1075
1076             DotExpr de=(DotExpr)e;
1077             FieldDescriptor fd=ap.getField(i);
1078             if (fd instanceof ArrayDescriptor) {
1079                 // We have an ArrayDescriptor!
1080                 Expr index=de.getIndex();
1081                 if (!index.isValue(null)) {/* Not assignable */
1082                     System.out.println("ERROR:Index isn't assignable");
1083                     return false;
1084                 }
1085                 Updates updates=new Updates(index,i,ap,lexpr,slotnumber);
1086                 un.addUpdate(updates);
1087             }
1088         }
1089         return true;
1090     }
1091
1092     /** This method constructs bindings for an update using rule
1093      * r. The boolean flag isremoval indicates that the update
1094      * performs a removal.  The function returns true if it is able to
1095      * generate a valid set of bindings and false otherwise. */
1096
1097     boolean constructbindings(Vector bindings, Rule r, AbstractRepair ar, Hashtable setmapping, boolean isremoval) {
1098         boolean goodupdate=true;
1099         Inclusion inc=r.getInclusion();
1100
1101         for(Iterator iterator=r.quantifiers();iterator.hasNext();) {
1102             Quantifier q=(Quantifier)iterator.next();
1103             if ((q instanceof SetQuantifier)||(q instanceof ForQuantifier)) {
1104                 VarDescriptor vd=null;
1105                 SetDescriptor set=null;
1106                 if (q instanceof SetQuantifier) {
1107                     vd=((SetQuantifier)q).getVar();
1108                     set=((SetQuantifier)q).getSet();
1109                 } else {
1110                     vd=((ForQuantifier)q).getVar();
1111                 }
1112                 if(inc instanceof SetInclusion) {
1113                     SetInclusion si=(SetInclusion)inc;
1114                     Expr tmpe=si.elementexpr;
1115                     Expr e=si.elementexpr;
1116
1117                     while(e instanceof CastExpr) {
1118                         CastExpr ce=(CastExpr)e;
1119                         if (ce.getType()!=si.getSet().getType())
1120                             return false;
1121                         e=ce.getExpr();
1122                     }
1123
1124                     if ((e instanceof VarExpr)&&
1125                         (((VarExpr)e).getVar()==vd)) {
1126                         /* Can solve for v */
1127                         if (set==null||!si.getSet().getType().isSubtypeOf(set.getType()))
1128                             return false;
1129                         Binding binding=new Binding(vd,0);
1130                         bindings.add(binding);
1131                     } else {
1132                         goodupdate=false;
1133                     }
1134                 } else if (inc instanceof RelationInclusion) {
1135                     RelationInclusion ri=(RelationInclusion)inc;
1136                     boolean f1=true;
1137                     boolean f2=true;
1138
1139                     Expr e=ri.getLeftExpr();
1140
1141                     while(e instanceof CastExpr) {
1142                         CastExpr ce=(CastExpr)e;
1143                         if (ce.getType()!=ri.getRelation().getDomain().getType())
1144                             return false;
1145                         e=ce.getExpr();
1146                     }
1147
1148                     if ((e instanceof VarExpr)&&
1149                         (((VarExpr)e).getVar()==vd)) {
1150                                 /* Can solve for v */
1151                         Binding binding=new Binding(vd,0);
1152                         if (!ri.getRelation().getDomain().getType().isSubtypeOf(set.getType()))
1153                             return false;
1154                         if (ar.getDomainSet()!=null)
1155                             setmapping.put(ri.getLeftExpr(),ar.getDomainSet());
1156                         bindings.add(binding);
1157                     } else f1=false;
1158
1159
1160                     e=ri.getRightExpr();
1161
1162                     while(e instanceof CastExpr) {
1163                         CastExpr ce=(CastExpr)e;
1164                         if (ce.getType()!=ri.getRelation().getRange().getType())
1165                             return false;
1166                         e=ce.getExpr();
1167                     }
1168
1169                     if ((e instanceof VarExpr)&&
1170                         (((VarExpr)e).getVar()==vd)) {
1171                                 /* Can solve for v */
1172                         Binding binding=new Binding(vd,1);
1173                         if (!ri.getRelation().getRange().getType().isSubtypeOf(set.getType()))
1174                             return false;
1175                         if (ar.getRangeSet()!=null)
1176                             setmapping.put(ri.getRightExpr(),ar.getRangeSet());
1177                         bindings.add(binding);
1178                     } else f2=false;
1179                     if (!(f1||f2))
1180                         goodupdate=false;
1181                 } else throw new Error("Inclusion not recognized");
1182                 if (!goodupdate)
1183                     if (isremoval) {
1184                         /* Removals don't need bindings anymore
1185                            Binding binding=new Binding(vd);
1186                            bindings.add(binding);*/
1187                         goodupdate=true;
1188                     } else if (q instanceof SetQuantifier) {
1189                         /* Create new element to bind to */
1190                         // search if the set 'set' has a size
1191                         Binding binding=new Binding(vd,set,exactsize.getsize(set)==1);
1192                         bindings.add(binding);
1193                         goodupdate=true;
1194
1195                     } else
1196                         goodupdate=false;
1197             } else if (q instanceof RelationQuantifier) {
1198                 RelationQuantifier rq=(RelationQuantifier)q;
1199                 for(int k=0;k<2;k++) {
1200                     VarDescriptor vd=(k==0)?rq.x:rq.y;
1201                     TypeDescriptor td=(k==0)?rq.getRelation().getDomain().getType():rq.getRelation().getRange().getType();
1202                     if(inc instanceof SetInclusion) {
1203                         SetInclusion si=(SetInclusion)inc;
1204
1205                         Expr e=si.elementexpr;
1206
1207                         while(e instanceof CastExpr) {
1208                             CastExpr ce=(CastExpr)e;
1209                             if (ce.getType()!=td)
1210                                 return false;
1211                             e=ce.getExpr();
1212                         }
1213
1214                         if ((e instanceof VarExpr)&&
1215                             (((VarExpr)e).getVar()==vd)) {
1216                             /* Can solve for v */
1217                             Binding binding=new Binding(vd,0);
1218
1219                             if (!si.getSet().getType().isSubtypeOf(td))
1220                                 return false;
1221                             bindings.add(binding);
1222                         } else
1223                             goodupdate=false;
1224                     } else if (inc instanceof RelationInclusion) {
1225                         RelationInclusion ri=(RelationInclusion)inc;
1226                         boolean f1=true;
1227                         boolean f2=true;
1228
1229
1230                         Expr e=ri.getLeftExpr();
1231
1232                         while(e instanceof CastExpr) {
1233                             CastExpr ce=(CastExpr)e;
1234                             if (ce.getType()!=ri.getRelation().getDomain().getType())
1235                                 return false;
1236                             e=ce.getExpr();
1237                         }
1238                         if ((ri.getLeftExpr() instanceof VarExpr)&&
1239                             (((VarExpr)ri.getLeftExpr()).getVar()==vd)) {
1240                             /* Can solve for v */
1241                             Binding binding=new Binding(vd,0);
1242                             if (!ri.getRelation().getDomain().getType().isSubtypeOf(td))
1243                                 return false;
1244                             if (ar.getDomainSet()!=null)
1245                                 setmapping.put(ri.getLeftExpr(),ar.getDomainSet());
1246                             bindings.add(binding);
1247                         } else f1=false;
1248
1249
1250                         e=ri.getRightExpr();
1251
1252                         while(e instanceof CastExpr) {
1253                             CastExpr ce=(CastExpr)e;
1254                             if (ce.getType()!=ri.getRelation().getRange().getType())
1255                                 return false;
1256                             e=ce.getExpr();
1257                         }
1258                         if ((ri.getRightExpr() instanceof VarExpr)&&
1259                             (((VarExpr)ri.getRightExpr()).getVar()==vd)) {
1260                             /* Can solve for v */
1261                             Binding binding=new Binding(vd,1);
1262                             if (!ri.getRelation().getRange().getType().isSubtypeOf(td))
1263                                 return false;
1264                             if (ar.getRangeSet()!=null)
1265                                 setmapping.put(ri.getRightExpr(),ar.getRangeSet());
1266                             bindings.add(binding);
1267                         } else f2=false;
1268                         if (!(f1||f2))
1269                             goodupdate=false;
1270                     } else throw new Error("Inclusion not recognized");
1271                     if (!goodupdate)
1272                         if (isremoval) {
1273                             /* Removals don't need bindings anymore
1274                                Binding binding=new Binding(vd);
1275                                bindings.add(binding);*/
1276                             goodupdate=true;
1277                         } else
1278                             break;
1279                 }
1280                 if (!goodupdate)
1281                     break;
1282             } else throw new Error("Quantifier not recognized");
1283         }
1284         return goodupdate;
1285     }
1286
1287     /** Adds updates that add an item to the appropriate set or
1288      * relation quantified over by the model definition rule.. */
1289
1290     boolean processquantifiers(GraphNode gn,UpdateNode un, Rule r,Hashtable setmapping) {
1291         Inclusion inc=r.getInclusion();
1292         for(Iterator iterator=r.quantifiers();iterator.hasNext();) {
1293             Quantifier q=(Quantifier)iterator.next();
1294             /* Add quantifier */
1295             if (q instanceof RelationQuantifier) {
1296                 RelationQuantifier rq=(RelationQuantifier)q;
1297                 TupleOfExpr toe=new TupleOfExpr(new VarExpr(rq.x),new VarExpr(rq.y),rq.relation);
1298                 toe.td=ReservedTypeDescriptor.INT;
1299                 Updates u=new Updates(toe,false);
1300                 un.addUpdate(u);
1301                 if (abstractadd.containsKey(rq.relation)) {
1302                     GraphNode agn=(GraphNode)abstractadd.get(rq.relation);
1303                     GraphNode.Edge e=new GraphNode.Edge("requiresadd5",agn);
1304                     gn.addEdge(e);
1305                 } else {
1306                     return false;
1307                 }
1308             } else if (q instanceof SetQuantifier) {
1309                 SetQuantifier sq=(SetQuantifier)q;
1310                 if (un.getBinding(sq.var).getType()==Binding.SEARCH) {
1311                     Binding b=un.getBinding(sq.var);
1312                     Constraint reqc=exactsize.getConstraint(b.getSet());
1313                     constraintdependence.requiresConstraint(gn,reqc);
1314                     continue; /* Don't need to ensure addition for search */
1315                 }
1316                 VarExpr ve=new VarExpr(sq.var);
1317                 SetDescriptor sd=findExpr(setmapping, ve);
1318                 if (sd!=null&&sd.isSubset(sq.set))
1319                     continue; /* this update is trivially true */
1320
1321                 ElementOfExpr eoe=new ElementOfExpr(ve,sq.set);
1322                 eoe.td=ReservedTypeDescriptor.INT;
1323                 Updates u=new Updates(eoe,false);
1324                 un.addUpdate(u);
1325                 if (abstractadd.containsKey(sq.set)) {
1326                     GraphNode agn=(GraphNode)abstractadd.get(sq.set);
1327                     GraphNode.Edge e=new GraphNode.Edge("requiresadd6",agn);
1328                     gn.addEdge(e);
1329                 } else {
1330                     return false;
1331                 }
1332             } else return false;
1333         }
1334         return true;
1335     }
1336
1337     static SetDescriptor findExpr(Hashtable setmapping, Expr e) {
1338         if (setmapping==null)
1339             return null;
1340         Set kset=setmapping.keySet();
1341         for(Iterator it=kset.iterator();it.hasNext();) {
1342             Expr expr=(Expr)it.next();
1343             if (expr.equals(null,e)) {
1344                 return (SetDescriptor)setmapping.get(expr);
1345             }
1346         }
1347         return null;
1348     }
1349
1350     /** This method generates the necessary updates to satisfy the
1351      * conjunction ruleconj. */
1352
1353     boolean  processconjunction(UpdateNode un,RuleConjunction ruleconj,Hashtable setmapping) {
1354         boolean okay=true;
1355         for(int k=0;k<ruleconj.size();k++) {
1356             DNFExpr de=ruleconj.get(k);
1357             Expr e=de.getExpr();
1358             if (e instanceof OpExpr) {
1359                 OpExpr ex=(OpExpr)de.getExpr();
1360                 Opcode op=ex.getOpcode();
1361                 Updates up=new Updates(ex.left,ex.right,op, de.getNegation());
1362                 un.addUpdate(up);
1363             } else if (e instanceof ElementOfExpr) {
1364                 SetDescriptor sd=findExpr(setmapping, ((ElementOfExpr)e).element);
1365                 if (sd!=null&&sd.isSubset(((ElementOfExpr)e).set))
1366                     continue; /* this update is trivially true */
1367                 Updates up=new Updates(e,de.getNegation());
1368                 un.addUpdate(up);
1369             } else if (e instanceof TupleOfExpr) {
1370                 Updates up=new Updates(e,de.getNegation());
1371                 un.addUpdate(up);
1372             } else if (e instanceof BooleanLiteralExpr) {
1373                 boolean truth=((BooleanLiteralExpr)e).getValue();
1374                 if (de.getNegation())
1375                     truth=!truth;
1376                 if (!truth) {
1377                     okay=false;
1378                     break;
1379                 }
1380             } else {
1381                 System.out.println(e.getClass().getName());
1382                 throw new Error("Unrecognized Expr");
1383             }
1384         }
1385         return okay;
1386     }
1387
1388     /** This method sees if when the quantifiers listed in set are
1389      *  fixed, whether there can be more than one unique binding for
1390      *  the constraint or model definition rule qs.*/
1391     public boolean analyzeQuantifiers(Quantifiers qs,Set set) {
1392         for(int i=0;i<qs.numQuantifiers();i++) {
1393             Quantifier q=qs.getQuantifier(i);
1394             if (set.contains(q))
1395                 continue;
1396             if (q instanceof SetQuantifier) {
1397                 SetDescriptor sd=((SetQuantifier)q).getSet();
1398                 if (maxsize.getsize(sd)<=1&&
1399                     maxsize.getsize(sd)>=0)
1400                     continue;
1401             } else if (q instanceof RelationQuantifier) {
1402                 RelationDescriptor rd=((RelationQuantifier)q).getRelation();
1403                 if (maxsize.getsize(rd)<=1&&
1404                     maxsize.getsize(rd)>=0)
1405                     continue;
1406             }
1407             return false;
1408         }
1409         return true;
1410     }
1411
1412     public boolean mutuallyexclusive(SetDescriptor sd1, SetDescriptor sd2) {
1413         if (mutualexclusive(sd1,sd2)||
1414             mutualexclusive(sd2,sd1))
1415             return true;
1416         else
1417             return false;
1418     }
1419
1420     private boolean mutualexclusive(SetDescriptor sd1, SetDescriptor sd2) {
1421         Vector rules=state.vRules;
1422         for(int i=0;i<rules.size();i++) {
1423             Rule r=(Rule)rules.get(i);
1424             if (r.getInclusion().getTargetDescriptors().contains(sd1)) {
1425                 /* Rule may add items to sd1 */
1426                 SetInclusion si=(SetInclusion)r.getInclusion();
1427                 Expr ve=si.getExpr();
1428                 DNFRule drule=r.getDNFGuardExpr();
1429                 for(int j=0;j<drule.size();j++) {
1430                     RuleConjunction rconj=drule.get(j);
1431                     boolean containsexclusion=false;
1432                     for (int k=0;k<rconj.size();k++) {
1433                         DNFExpr dexpr=rconj.get(k);
1434                         if (dexpr.getNegation()&&
1435                             dexpr.getExpr() instanceof ElementOfExpr&&
1436                             ((ElementOfExpr)dexpr.getExpr()).element.equals(null,ve)) {
1437                             SetDescriptor sd=((ElementOfExpr)dexpr.getExpr()).set;
1438                             if (sd.isSubset(sd2))
1439                                 containsexclusion=true;
1440                         }
1441                     }
1442                     if (!containsexclusion)
1443                         return false;
1444                 }
1445             }
1446         }
1447         return true;
1448     }
1449
1450     boolean equivalent(SetExpr se, RelationExpr re) {
1451         if (!(se instanceof ImageSetExpr))
1452             return false;
1453         ImageSetExpr ise=(ImageSetExpr)se;
1454         while(re!=null&&ise!=null) {
1455             if (re.getRelation()!=ise.getRelation())
1456                 return false;
1457             if (re.inverted()!=ise.inverted())
1458                 return false;
1459             if (ise.isimageset) {
1460                 ise=ise.getImageSetExpr();
1461                 if (!(re.getExpr() instanceof RelationExpr))
1462                     return false;
1463                 re=(RelationExpr)re.getExpr();
1464             } else {
1465                 if (!(re.getExpr() instanceof VarExpr))
1466                     return false;
1467                 if (((VarExpr)re.getExpr()).getVar()==ise.getVar())
1468                     return true; //everything matches
1469                 return false;
1470             }
1471         }
1472         return false;
1473     }
1474 }