7 public class Termination {
9 Hashtable conjunctionmap;
11 HashSet abstractrepair;
12 HashSet abstractrepairadd;
15 HashSet consequencenodes;
18 Hashtable scopesatisfy;
19 Hashtable scopefalsify;
20 Hashtable consequence;
21 Hashtable abstractadd;
22 Hashtable abstractremove;
23 Hashtable conjtonodemap;
24 Hashtable predtoabstractmap;
26 ComputeMaxSize maxsize;
28 AbstractInterferes abstractinterferes;
29 ConcreteInterferes concreteinterferes;
30 ConstraintDependence constraintdependence;
32 ArrayAnalysis arrayanalysis;
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";
41 public Termination(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();
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));
66 sources=new Sources(state);
67 maxsize=new ComputeMaxSize(state);
68 exactsize=new ExactSize(state);
69 arrayanalysis=new ArrayAnalysis(state,this);
71 abstractinterferes=new AbstractInterferes(this);
72 concreteinterferes=new ConcreteInterferes(this);
73 generateconjunctionnodes();
74 constraintdependence=new ConstraintDependence(state,this);
76 debugmsg("*****Generating scope nodes*****");
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*****");
89 debugmsg("*****Generating update edges*****");
90 generateupdateedges();
93 HashSet superset=new HashSet();
94 superset.addAll(conjunctions);
95 HashSet closureset=new HashSet();
96 debugmsg("Computing closure");
97 GraphNode.computeclosure(superset,closureset);
99 GraphNode.DOTVisitor.visit(new FileOutputStream("graph.dot"),superset);
100 } catch (Exception e) {
105 generatedebuggraphs();
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());
114 GraphAnalysis ga=new GraphAnalysis(this);
115 removedset=ga.doAnalysis();
116 if (removedset==null) {
117 System.out.println("Can't generate terminating repair algorithm!");
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());
127 superset=new HashSet();
128 superset.addAll(conjunctions);
129 superset.removeAll(removedset);
130 GraphNode.computeclosure(superset,removedset);
132 GraphNode.DOTVisitor.visit(new FileOutputStream("graphfinal.dot"),superset);
133 } catch (Exception e) {
137 constraintdependence.traversedependences(this);
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);
146 if (di.conjunctionnum==-1) {
147 superset.addAll((Set)conjunctionmap.get(constr));
149 DNFConstraint dnf=constr.dnfconstraint;
150 superset.add(conjtonodemap.get(dnf.get(di.conjunctionnum)));
153 GraphNode.boundedcomputeclosure(superset,null,di.depth);
155 GraphNode.DOTVisitor.visit(new FileOutputStream("graph"+di.constraintnum+"-"+di.depth+(di.conjunctionnum==-1?"":"-"+di.conjunctionnum)+".dot"),superset);
156 } catch (Exception e) {
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 */
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()
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);
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);
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()
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);
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);
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()
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);
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;
245 GraphNode agn=(GraphNode)abstractremove.get(toe.relation);
246 GraphNode.Edge edge=new GraphNode.Edge("requirestupleremove",agn);
249 GraphNode agn=(GraphNode)abstractadd.get(toe.relation);
250 GraphNode.Edge edge=new GraphNode.Edge("requirestupleadd",agn);
253 } else if (e instanceof ElementOfExpr) {
254 ElementOfExpr eoe=(ElementOfExpr)e;
256 GraphNode agn=(GraphNode)abstractremove.get(eoe.set);
257 GraphNode.Edge edge=new GraphNode.Edge("requireselementremove",agn);
260 GraphNode agn=(GraphNode)abstractadd.get(eoe.set);
261 GraphNode.Edge edge=new GraphNode.Edge("requireselementadd",agn);
264 } else throw new Error("Unrecognized Abstract Update");
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());
274 if (concreteinterferes.interferes(mun,r,true)) {
275 GraphNode scopenode=(GraphNode)scopesatisfy.get(r);
276 GraphNode.Edge e=new GraphNode.Edge("satisfyscopeinterferes",scopenode);
279 if (Compiler.DEBUGGRAPH) {
280 System.out.println(gn.getLabel()+"--->"+((GraphNode)scopefalsify.get(r)).getLabel());
282 if (concreteinterferes.interferes(mun,r,false)) {
283 GraphNode scopenode=(GraphNode)scopefalsify.get(r);
284 GraphNode.Edge e=new GraphNode.Edge("falsifyscopeinterferes",scopenode);
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();
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))
306 if (AbstractInterferes.interferesquantifier(ar,cons)) {
307 GraphNode.Edge e=new GraphNode.Edge("interferesquantifier",gn2);
310 for(int i=0;i<conj.size();i++) {
311 DNFPredicate dp=conj.get(i);
313 if (!abstractinterferes.interfereswithpredicate(ar,dp))
315 if (getConstraint(gn)==null||
316 !abstractinterferes.interferemodifies(ar,getConstraint(gn),dp,cons)) {
317 GraphNode.Edge e=new GraphNode.Edge("interferesmodify",gn2);
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);
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();
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);
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);
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();
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);
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);
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);
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();
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...
466 for(int j=0;j<array.length;j++) {
467 if (array[j]==AbstractRepair.ADDTOSET) {
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");
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...
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);
502 if (!predtoabstractmap.containsKey(dp))
503 predtoabstractmap.put(dp,new HashSet());
504 ((Set)predtoabstractmap.get(dp)).add(gn2);
505 abstractrepair.add(gn2);
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);
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);
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);
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");
547 InclusionPredicate ip=new InclusionPredicate(ve2,new ImageSetExpr(vd1, rd));
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);
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);
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();
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);
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);
600 if (abstractremove.containsKey(rq.relation)) {
601 GraphNode agn=(GraphNode)abstractremove.get(rq.relation);
602 GraphNode.Edge e=new GraphNode.Edge("requiresremove1",agn);
605 continue; /* Abstract repair doesn't exist */
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);
613 if (abstractremove.containsKey(sq.set)) {
614 GraphNode agn=(GraphNode)abstractremove.get(sq.set);
615 GraphNode.Edge e=new GraphNode.Edge("requiresremove2",agn);
618 continue; /* Abstract repair doesn't exist */
624 /* Negate conjunction */
625 int c=j-r.numQuantifiers();
626 if (!processconjunction(un,r.getDNFNegGuardExpr().get(c),null)) {
630 if (!un.checkupdates()) /* Make sure we have a good update */
634 GraphNode.Edge e=new GraphNode.Edge("abstractcomp"+compensationcount,gn2);
637 updatenodes.add(gn2);
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);
668 /** This method generates concrete data structure updates which
669 * remove an object (or tuple) from a set (or relation).*/
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 */
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);
685 if (possiblerules.size()==0)
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);
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);
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);
710 if (abstractremove.containsKey(rq.relation)) {
711 GraphNode agn=(GraphNode)abstractremove.get(rq.relation);
712 GraphNode.Edge e=new GraphNode.Edge("requiresremove3",agn);
715 goodflag=false;break; /* Abstract repair doesn't exist */
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);
723 if (abstractremove.containsKey(sq.set)) {
724 GraphNode agn=(GraphNode)abstractremove.get(sq.set);
725 GraphNode.Edge e=new GraphNode.Edge("requiresremove4",agn);
728 goodflag=false;break; /* Abstract repair doesn't exist */
730 } else {goodflag=false;break;}
732 int c=count[i]-r.numQuantifiers();
733 if (!processconjunction(un,r.getDNFNegGuardExpr().get(c),null)) {
734 goodflag=false;break;
737 if (!un.checkupdates()) {
744 GraphNode.Edge e=new GraphNode.Edge("abstract3"+(removefromcount++),gn2);
746 updatenodes.add(gn2);
748 increment(count,possiblerules,true);
752 /** This method increments to the next possibility. */
754 static private void increment(int count[], Vector rules,boolean isremove) {
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();
766 /** This method test if there remain any possibilities to loop
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();
778 /** This method generates data structure updates to implement the
779 * abstract atomic modification specified by ar. */
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();
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);
801 if (possiblerules.size()==0)
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);
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);
818 if (!processconjunction(un,r.getDNFGuardExpr().get(c),null)) {
819 goodflag=false;break;
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());
829 else un.addInvariant(ri.getLeftExpr());
832 VarDescriptor vd=((VarExpr)ri.getLeftExpr()).getVar();
834 Updates up=new Updates(ri.getLeftExpr(),leftindex,null);
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());
847 un.addInvariant(ri.getLeftExpr());
850 VarDescriptor vd=((VarExpr)ri.getRightExpr()).getVar();
852 Updates up=new Updates(ri.getRightExpr(),rightindex,null);
854 } else if (!inverted)
858 if (!un.checkupdates()) {
865 GraphNode.Edge e=new GraphNode.Edge("abstract4"+modifycount,gn2);
868 updatenodes.add(gn2);
870 increment(count,possiblerules,false);
874 /** Generate concrete data structure update to add an object(or
875 * tuple) to a set (or relation). */
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);
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())) {
889 /* First solve for quantifiers */
890 Vector bindings=new Vector();
891 /* Construct bindings */
893 Hashtable setmapping=new Hashtable();
894 System.out.println("Attempting to construct bindings");
896 if (!constructbindings(bindings,r,ar,setmapping,false))
898 System.out.println("Bindings constructed");
899 //Generate add instruction
900 DNFRule dnfrule=r.getDNFGuardExpr();
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;
911 while(e instanceof CastExpr) {
912 CastExpr ce=(CastExpr)e;
913 if (ce.getType()!=si.getSet().getType())
918 if (!(e instanceof VarExpr)) {
919 if (e.isValue(si.getSet().getType())) {
920 Updates up=new Updates(e,0,si.getSet().getType());
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;
929 ArrayAnalysis.AccessPath ap=arrayanalysis.getSet(set);
930 if (rap==ArrayAnalysis.AccessPath.NONE)
934 if (!constructarrayupdate(un, e, rap, 0))
938 VarDescriptor vd=((VarExpr)e).getVar();
940 Updates up=new Updates(e,0,null);
944 } else if (inc instanceof RelationInclusion) {
945 RelationInclusion ri=(RelationInclusion)inc;
947 Expr e=ri.getLeftExpr();
949 while(e instanceof CastExpr) {
950 CastExpr ce=(CastExpr)e;
951 if (ce.getType()!=ri.getRelation().getDomain().getType())
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());
962 /* We don't handly relation modifies */
963 if (ar.getType()==AbstractRepair.MODIFYRELATION)
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;
971 ArrayAnalysis.AccessPath ap=arrayanalysis.getSet(set);
972 if (rap==ArrayAnalysis.AccessPath.NONE||
974 !constructarrayupdate(un, e, rap, 0))
976 if (ar.getDomainSet()!=null)
977 setmapping.put(e,ar.getDomainSet());
981 VarDescriptor vd=((VarExpr)e).getVar();
983 Updates up=new Updates(e,0,null);
984 if (ar.getDomainSet()!=null)
985 setmapping.put(e,ar.getDomainSet());
992 while(e instanceof CastExpr) {
993 CastExpr ce=(CastExpr)e;
994 if (ce.getType()!=ri.getRelation().getRange().getType())
998 if (!(e instanceof VarExpr)) {
999 if (e.isValue(ri.getRelation().getRange().getType())) {
1000 Updates up=new Updates(e,1,ri.getRelation().getRange().getType());
1003 /* We don't handly relation modifies */
1004 if (ar.getType()==AbstractRepair.MODIFYRELATION)
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;
1012 ArrayAnalysis.AccessPath ap=arrayanalysis.getSet(set);
1014 if (rap==ArrayAnalysis.AccessPath.NONE||
1016 !constructarrayupdate(un, e, rap, 1))
1018 if (ar.getRangeSet()!=null)
1019 setmapping.put(e,ar.getRangeSet());
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());
1031 System.out.println("Built inclusion condition updates.");
1032 //Finally build necessary updates to satisfy conjunction
1033 RuleConjunction ruleconj=dnfrule.get(j);
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);
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")&&
1047 debugmsg("Updates checked")) {
1049 GraphNode.Edge e=new GraphNode.Edge("abstract5"+addtocount,gn2);
1052 updatenodes.add(gn2);
1059 boolean debugmsg(String st) {
1060 System.out.println(st);
1064 boolean constructarrayupdate(UpdateNode un, Expr lexpr, ArrayAnalysis.AccessPath ap, int slotnumber) {
1065 System.out.println("Constructing array update");
1067 for (int i=ap.numFields()-1;i>=0;i--) {
1071 e=((DotExpr)e).getExpr();
1073 while (e instanceof CastExpr)
1074 e=((CastExpr)e).getExpr();
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");
1085 Updates updates=new Updates(index,i,ap,lexpr,slotnumber);
1086 un.addUpdate(updates);
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. */
1097 boolean constructbindings(Vector bindings, Rule r, AbstractRepair ar, Hashtable setmapping, boolean isremoval) {
1098 boolean goodupdate=true;
1099 Inclusion inc=r.getInclusion();
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();
1110 vd=((ForQuantifier)q).getVar();
1112 if(inc instanceof SetInclusion) {
1113 SetInclusion si=(SetInclusion)inc;
1114 Expr tmpe=si.elementexpr;
1115 Expr e=si.elementexpr;
1117 while(e instanceof CastExpr) {
1118 CastExpr ce=(CastExpr)e;
1119 if (ce.getType()!=si.getSet().getType())
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()))
1129 Binding binding=new Binding(vd,0);
1130 bindings.add(binding);
1134 } else if (inc instanceof RelationInclusion) {
1135 RelationInclusion ri=(RelationInclusion)inc;
1139 Expr e=ri.getLeftExpr();
1141 while(e instanceof CastExpr) {
1142 CastExpr ce=(CastExpr)e;
1143 if (ce.getType()!=ri.getRelation().getDomain().getType())
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()))
1154 if (ar.getDomainSet()!=null)
1155 setmapping.put(ri.getLeftExpr(),ar.getDomainSet());
1156 bindings.add(binding);
1160 e=ri.getRightExpr();
1162 while(e instanceof CastExpr) {
1163 CastExpr ce=(CastExpr)e;
1164 if (ce.getType()!=ri.getRelation().getRange().getType())
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()))
1175 if (ar.getRangeSet()!=null)
1176 setmapping.put(ri.getRightExpr(),ar.getRangeSet());
1177 bindings.add(binding);
1181 } else throw new Error("Inclusion not recognized");
1184 /* Removals don't need bindings anymore
1185 Binding binding=new Binding(vd);
1186 bindings.add(binding);*/
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);
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;
1205 Expr e=si.elementexpr;
1207 while(e instanceof CastExpr) {
1208 CastExpr ce=(CastExpr)e;
1209 if (ce.getType()!=td)
1214 if ((e instanceof VarExpr)&&
1215 (((VarExpr)e).getVar()==vd)) {
1216 /* Can solve for v */
1217 Binding binding=new Binding(vd,0);
1219 if (!si.getSet().getType().isSubtypeOf(td))
1221 bindings.add(binding);
1224 } else if (inc instanceof RelationInclusion) {
1225 RelationInclusion ri=(RelationInclusion)inc;
1230 Expr e=ri.getLeftExpr();
1232 while(e instanceof CastExpr) {
1233 CastExpr ce=(CastExpr)e;
1234 if (ce.getType()!=ri.getRelation().getDomain().getType())
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))
1244 if (ar.getDomainSet()!=null)
1245 setmapping.put(ri.getLeftExpr(),ar.getDomainSet());
1246 bindings.add(binding);
1250 e=ri.getRightExpr();
1252 while(e instanceof CastExpr) {
1253 CastExpr ce=(CastExpr)e;
1254 if (ce.getType()!=ri.getRelation().getRange().getType())
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))
1264 if (ar.getRangeSet()!=null)
1265 setmapping.put(ri.getRightExpr(),ar.getRangeSet());
1266 bindings.add(binding);
1270 } else throw new Error("Inclusion not recognized");
1273 /* Removals don't need bindings anymore
1274 Binding binding=new Binding(vd);
1275 bindings.add(binding);*/
1282 } else throw new Error("Quantifier not recognized");
1287 /** Adds updates that add an item to the appropriate set or
1288 * relation quantified over by the model definition rule.. */
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);
1301 if (abstractadd.containsKey(rq.relation)) {
1302 GraphNode agn=(GraphNode)abstractadd.get(rq.relation);
1303 GraphNode.Edge e=new GraphNode.Edge("requiresadd5",agn);
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 */
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 */
1321 ElementOfExpr eoe=new ElementOfExpr(ve,sq.set);
1322 eoe.td=ReservedTypeDescriptor.INT;
1323 Updates u=new Updates(eoe,false);
1325 if (abstractadd.containsKey(sq.set)) {
1326 GraphNode agn=(GraphNode)abstractadd.get(sq.set);
1327 GraphNode.Edge e=new GraphNode.Edge("requiresadd6",agn);
1332 } else return false;
1337 static SetDescriptor findExpr(Hashtable setmapping, Expr e) {
1338 if (setmapping==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);
1350 /** This method generates the necessary updates to satisfy the
1351 * conjunction ruleconj. */
1353 boolean processconjunction(UpdateNode un,RuleConjunction ruleconj,Hashtable setmapping) {
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());
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());
1369 } else if (e instanceof TupleOfExpr) {
1370 Updates up=new Updates(e,de.getNegation());
1372 } else if (e instanceof BooleanLiteralExpr) {
1373 boolean truth=((BooleanLiteralExpr)e).getValue();
1374 if (de.getNegation())
1381 System.out.println(e.getClass().getName());
1382 throw new Error("Unrecognized Expr");
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))
1396 if (q instanceof SetQuantifier) {
1397 SetDescriptor sd=((SetQuantifier)q).getSet();
1398 if (maxsize.getsize(sd)<=1&&
1399 maxsize.getsize(sd)>=0)
1401 } else if (q instanceof RelationQuantifier) {
1402 RelationDescriptor rd=((RelationQuantifier)q).getRelation();
1403 if (maxsize.getsize(rd)<=1&&
1404 maxsize.getsize(rd)>=0)
1412 public boolean mutuallyexclusive(SetDescriptor sd1, SetDescriptor sd2) {
1413 if (mutualexclusive(sd1,sd2)||
1414 mutualexclusive(sd2,sd1))
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;
1442 if (!containsexclusion)
1450 boolean equivalent(SetExpr se, RelationExpr re) {
1451 if (!(se instanceof ImageSetExpr))
1453 ImageSetExpr ise=(ImageSetExpr)se;
1454 while(re!=null&&ise!=null) {
1455 if (re.getRelation()!=ise.getRelation())
1457 if (re.inverted()!=ise.inverted())
1459 if (ise.isimageset) {
1460 ise=ise.getImageSetExpr();
1461 if (!(re.getExpr() instanceof RelationExpr))
1463 re=(RelationExpr)re.getExpr();
1465 if (!(re.getExpr() instanceof VarExpr))
1467 if (((VarExpr)re.getExpr()).getVar()==ise.getVar())
1468 return true; //everything matches