package MCC.IR;
import java.util.*;
+import java.io.*;
import MCC.State;
+import MCC.Compiler;
public class Termination {
HashSet conjunctions;
Hashtable conjunctionmap;
HashSet abstractrepair;
+ HashSet abstractrepairadd;
+
+ HashSet updatenodes;
+ HashSet consequencenodes;
HashSet scopenodes;
Hashtable scopesatisfy;
Hashtable scopefalsify;
-
+ Hashtable consequence;
+ Hashtable abstractadd;
+ Hashtable abstractremove;
+ Hashtable conjtonodemap;
+ Hashtable predtoabstractmap;
+ Set removedset;
+ ComputeMaxSize maxsize;
State state;
+ AbstractInterferes abstractinterferes;
+ ConcreteInterferes concreteinterferes;
+ ConstraintDependence constraintdependence;
+ ExactSize exactsize;
+ ArrayAnalysis arrayanalysis;
+ Sources sources;
public Termination(State state) {
this.state=state;
conjunctions=new HashSet();
conjunctionmap=new Hashtable();
abstractrepair=new HashSet();
+ abstractrepairadd=new HashSet();
scopenodes=new HashSet();
scopesatisfy=new Hashtable();
scopefalsify=new Hashtable();
+ consequence=new Hashtable();
+ updatenodes=new HashSet();
+ consequencenodes=new HashSet();
+ abstractadd=new Hashtable();
+ abstractremove=new Hashtable();
+ conjtonodemap=new Hashtable();
+ predtoabstractmap=new Hashtable();
+ if (!Compiler.REPAIR)
+ return;
+
+
+ for(int i=0;i<state.vRules.size();i++)
+ System.out.println(state.vRules.get(i));
+ for(int i=0;i<state.vConstraints.size();i++)
+ System.out.println(state.vConstraints.get(i));
+ sources=new Sources(state);
+ maxsize=new ComputeMaxSize(state);
+ exactsize=new ExactSize(state);
+ arrayanalysis=new ArrayAnalysis(state,this);
+
+ abstractinterferes=new AbstractInterferes(this);
+ concreteinterferes=new ConcreteInterferes(this);
generateconjunctionnodes();
+ constraintdependence=new ConstraintDependence(state,this);
+
+ debugmsg("Generating scope nodes");
+ generatescopenodes();
+ debugmsg("Generating repair nodes");
generaterepairnodes();
- generateabstractedges();
+ debugmsg("Generating data structure nodes");
generatedatastructureupdatenodes();
- generatescopenodes();
+ debugmsg("Generating compensation nodes");
+ generatecompensationnodes();
+ debugmsg("Generating abstract edges");
+ generateabstractedges();
+ debugmsg("Generating scope edges");
+ generatescopeedges();
+ debugmsg("Generating update edges");
+ generateupdateedges();
+
+
+ HashSet superset=new HashSet();
+ superset.addAll(conjunctions);
+ HashSet closureset=new HashSet();
+ debugmsg("Computing closure");
+ GraphNode.computeclosure(superset,closureset);
+ try {
+ GraphNode.DOTVisitor.visit(new FileOutputStream("graph.dot"),superset);
+ } catch (Exception e) {
+ e.printStackTrace();
+ System.exit(-1);
+ }
+
+ generatedebuggraphs();
+
+ for(Iterator it=updatenodes.iterator();it.hasNext();) {
+ GraphNode gn=(GraphNode)it.next();
+ TermNode tn=(TermNode)gn.getOwner();
+ MultUpdateNode mun=tn.getUpdate();
+ System.out.println(gn.getTextLabel());
+ System.out.println(mun.toString());
+ }
+ GraphAnalysis ga=new GraphAnalysis(this);
+ removedset=ga.doAnalysis();
+ if (removedset==null) {
+ System.out.println("Can't generate terminating repair algorithm!");
+ System.exit(-1);
+ }
+
+ System.out.println("Removing:");
+ for(Iterator it=removedset.iterator();it.hasNext();) {
+ GraphNode gn=(GraphNode)it.next();
+ System.out.println(gn.getTextLabel());
+ }
+
+ superset=new HashSet();
+ superset.addAll(conjunctions);
+ superset.removeAll(removedset);
+ GraphNode.computeclosure(superset,removedset);
+ try {
+ GraphNode.DOTVisitor.visit(new FileOutputStream("graphfinal.dot"),superset);
+ } catch (Exception e) {
+ e.printStackTrace();
+ System.exit(-1);
+ }
+ constraintdependence.traversedependences(this);
+ }
+
+ void generatedebuggraphs() {
+ for (int i=0;i<Compiler.debuggraphs.size();i++) {
+ DebugItem di=(DebugItem) Compiler.debuggraphs.get(i);
+ HashSet superset=new HashSet();
+ Constraint constr=(Constraint)state.vConstraints.get(di.constraintnum);
+
+ if (di.conjunctionnum==-1) {
+ superset.addAll((Set)conjunctionmap.get(constr));
+ } else {
+ DNFConstraint dnf=constr.dnfconstraint;
+ superset.add(conjtonodemap.get(dnf.get(di.conjunctionnum)));
+ }
+
+ GraphNode.boundedcomputeclosure(superset,null,di.depth);
+ try {
+ GraphNode.DOTVisitor.visit(new FileOutputStream("graph"+di.constraintnum+"-"+di.depth+(di.conjunctionnum==-1?"":"-"+di.conjunctionnum)+".dot"),superset);
+ } catch (Exception e) {
+ e.printStackTrace();
+ System.exit(-1);
+ }
+ }
}
-
+
+
+ /** This method generates a node for each conjunction in the DNF
+ * form of each constraint. It also converts the quantifiers into
+ * conjunctions also - constraints can be satisfied by removing
+ * items from the sets and relations they are quantified over */
+
void generateconjunctionnodes() {
Vector constraints=state.vConstraints;
+ // Constructs conjunction nodes
for(int i=0;i<constraints.size();i++) {
Constraint c=(Constraint)constraints.get(i);
DNFConstraint dnf=c.dnfconstraint;
for(int j=0;j<dnf.size();j++) {
TermNode tn=new TermNode(c,dnf.get(j));
- GraphNode gn=new GraphNode("Conjunction"+i+","+j,tn);
+ GraphNode gn=new GraphNode("Conj"+i+"A"+j,
+ "Conj ("+i+","+j+") "+dnf.get(j).name()
+ ,tn);
conjunctions.add(gn);
- conjunctionmap.put(c,gn);
+ if (!conjunctionmap.containsKey(c))
+ conjunctionmap.put(c,new HashSet());
+ ((Set)conjunctionmap.get(c)).add(gn);
+ conjtonodemap.put(dnf.get(j),gn);
+ }
+ // Construct quantifier "conjunction" nodes
+ for(int j=0;j<c.numQuantifiers();j++) {
+ Quantifier q=c.getQuantifier(j);
+ if (q instanceof SetQuantifier) {
+ SetQuantifier sq=(SetQuantifier)q;
+ VarExpr ve=new VarExpr(sq.getVar());
+ InclusionPredicate ip=new InclusionPredicate(ve,new SetExpr(sq.getSet()));
+ DNFConstraint dconst=new DNFConstraint(ip);
+ dconst=dconst.not();
+ TermNode tn=new TermNode(c,dconst.get(0));
+ tn.setquantifiernode();
+ GraphNode gn=new GraphNode("Conj"+i+"AQ"+j,
+ "Conj ("+i+","+j+") "+dconst.get(0).name()
+ ,tn);
+ conjunctions.add(gn);
+ if (!conjunctionmap.containsKey(c))
+ conjunctionmap.put(c,new HashSet());
+ ((Set)conjunctionmap.get(c)).add(gn);
+ conjtonodemap.put(dconst.get(0),gn);
+
+ } else if (q instanceof RelationQuantifier) {
+ RelationQuantifier rq=(RelationQuantifier)q;
+ VarExpr ve=new VarExpr(rq.y);
+ InclusionPredicate ip=new InclusionPredicate(ve,new ImageSetExpr(rq.x,rq.getRelation()));
+ DNFConstraint dconst=new DNFConstraint(ip);
+ dconst=dconst.not();
+ TermNode tn=new TermNode(c,dconst.get(0));
+ tn.setquantifiernode();
+ GraphNode gn=new GraphNode("Conj"+i+"AQ"+j,
+ "Conj ("+i+","+j+") "+dconst.get(0).name()
+ ,tn);
+ conjunctions.add(gn);
+ if (!conjunctionmap.containsKey(c))
+ conjunctionmap.put(c,new HashSet());
+ ((Set)conjunctionmap.get(c)).add(gn);
+ conjtonodemap.put(dconst.get(0),gn);
+ }
+ }
+ }
+ }
+
+ void generateupdateedges() {
+ for(Iterator updateiterator=updatenodes.iterator();updateiterator.hasNext();) {
+ GraphNode gn=(GraphNode)updateiterator.next();
+ TermNode tn=(TermNode)gn.getOwner();
+ MultUpdateNode mun=tn.getUpdate();
+ for(int i=0;i<mun.numUpdates();i++) {
+ UpdateNode un=mun.getUpdate(i);
+ for(int j=0;j<un.numUpdates();j++) {
+ Updates u=un.getUpdate(j);
+ if (u.getType()==Updates.ABSTRACT) {
+ Expr e=u.getLeftExpr();
+ boolean negated=u.negate;
+ if (e instanceof TupleOfExpr) {
+ TupleOfExpr toe=(TupleOfExpr)e;
+ if (negated) {
+ GraphNode agn=(GraphNode)abstractremove.get(toe.relation);
+ GraphNode.Edge edge=new GraphNode.Edge("requires",agn);
+ gn.addEdge(edge);
+ } else {
+ GraphNode agn=(GraphNode)abstractadd.get(toe.relation);
+ GraphNode.Edge edge=new GraphNode.Edge("requires",agn);
+ gn.addEdge(edge);
+ }
+ } else if (e instanceof ElementOfExpr) {
+ ElementOfExpr eoe=(ElementOfExpr)e;
+ if (negated) {
+ GraphNode agn=(GraphNode)abstractremove.get(eoe.set);
+ GraphNode.Edge edge=new GraphNode.Edge("requires",agn);
+ gn.addEdge(edge);
+ } else {
+ GraphNode agn=(GraphNode)abstractadd.get(eoe.set);
+ GraphNode.Edge edge=new GraphNode.Edge("requires",agn);
+ gn.addEdge(edge);
+ }
+ } else throw new Error("Unrecognized Abstract Update");
+ }
+ }
+ }
+ /* Cycle through the rules to look for possible conflicts */
+ for(int i=0;i<state.vRules.size();i++) {
+ Rule r=(Rule) state.vRules.get(i);
+ if (concreteinterferes.interferes(mun,r,true)) {
+ GraphNode scopenode=(GraphNode)scopesatisfy.get(r);
+ GraphNode.Edge e=new GraphNode.Edge("interferes",scopenode);
+ gn.addEdge(e);
+ }
+ if (concreteinterferes.interferes(mun,r,false)) {
+ GraphNode scopenode=(GraphNode)scopefalsify.get(r);
+ GraphNode.Edge e=new GraphNode.Edge("interferes",scopenode);
+ gn.addEdge(e);
+ }
}
}
}
GraphNode gn=(GraphNode)absiterator.next();
TermNode tn=(TermNode)gn.getOwner();
AbstractRepair ar=(AbstractRepair)tn.getAbstract();
-
+
for(Iterator conjiterator=conjunctions.iterator();conjiterator.hasNext();) {
GraphNode gn2=(GraphNode)conjiterator.next();
TermNode tn2=(TermNode)gn2.getOwner();
Conjunction conj=tn2.getConjunction();
+ Constraint cons=tn2.getConstraint();
+ /* See if this is a relation wellformedness constraint
+ that is trivially satisfied. */
+ if (abstractinterferes.checkrelationconstraint(ar, cons))
+ continue;
+ if (AbstractInterferes.interferesquantifier(ar,cons)) {
+ GraphNode.Edge e=new GraphNode.Edge("interferes",gn2);
+ gn.addEdge(e);
+ } else {
+ for(int i=0;i<conj.size();i++) {
+ DNFPredicate dp=conj.get(i);
+
+ if (!abstractinterferes.interfereswithpredicate(ar,dp))
+ continue;
+ if (getConstraint(gn)==null||
+ !abstractinterferes.interferemodifies(ar,getConstraint(gn),dp,cons)) {
+ GraphNode.Edge e=new GraphNode.Edge("interferes",gn2);
+ gn.addEdge(e);
+ break;
+ }
+ }
+ }
+ }
+ for(Iterator scopeiterator=scopenodes.iterator();scopeiterator.hasNext();) {
+ GraphNode gn2=(GraphNode)scopeiterator.next();
+ TermNode tn2=(TermNode)gn2.getOwner();
+ ScopeNode sn2=tn2.getScope();
+ if (AbstractInterferes.interfereswithrule(ar,sn2.getRule(),sn2.getSatisfy())) {
+ GraphNode.Edge e=new GraphNode.Edge("interferes",gn2);
+ gn.addEdge(e);
+ }
+ }
+ }
+ }
+
+ Constraint getConstraint(GraphNode gn) {
+ for(Iterator it=gn.inedges();it.hasNext();) {
+ GraphNode.Edge e=(GraphNode.Edge)it.next();
+ GraphNode gnsource=e.getSource();
+ TermNode tnsource=(TermNode)gnsource.getOwner();
+ if (tnsource.getType()==TermNode.CONJUNCTION) {
+ return tnsource.getConstraint();
+ }
+ }
+ return null;
+ }
+
+ void generatescopenodes() {
+ for(int i=0;i<state.vRules.size();i++) {
+ Rule r=(Rule) state.vRules.get(i);
+ ScopeNode satisfy=new ScopeNode(r,true);
+ TermNode tnsatisfy=new TermNode(satisfy);
+ GraphNode gnsatisfy=new GraphNode("SatisfyRule"+i,tnsatisfy);
+ ConsequenceNode cnsatisfy=new ConsequenceNode();
+ TermNode ctnsatisfy=new TermNode(cnsatisfy);
+ GraphNode cgnsatisfy=new GraphNode("ConseqSatisfyRule"+i,ctnsatisfy);
+ consequence.put(satisfy,cgnsatisfy);
+ GraphNode.Edge esat=new GraphNode.Edge("consequencesatisfy"+i,cgnsatisfy);
+ gnsatisfy.addEdge(esat);
+ consequencenodes.add(cgnsatisfy);
+ scopesatisfy.put(r,gnsatisfy);
+ scopenodes.add(gnsatisfy);
+
+ ScopeNode falsify=new ScopeNode(r,false);
+ TermNode tnfalsify=new TermNode(falsify);
+ GraphNode gnfalsify=new GraphNode("FalsifyRule"+i,tnfalsify);
+ ConsequenceNode cnfalsify=new ConsequenceNode();
+ TermNode ctnfalsify=new TermNode(cnfalsify);
+ GraphNode cgnfalsify=new GraphNode("ConseqFalsifyRule"+i,ctnfalsify);
+ consequence.put(falsify,cgnfalsify);
+ GraphNode.Edge efals=new GraphNode.Edge("consequencefalsify"+i,cgnfalsify);
+ gnfalsify.addEdge(efals);
+ consequencenodes.add(cgnfalsify);
+ scopefalsify.put(r,gnfalsify);
+ scopenodes.add(gnfalsify);
+ }
+ }
+
+ void generatescopeedges() {
+ for(Iterator scopeiterator=scopenodes.iterator();scopeiterator.hasNext();) {
+ GraphNode gn=(GraphNode)scopeiterator.next();
+ TermNode tn=(TermNode)gn.getOwner();
+ ScopeNode sn=tn.getScope();
+
+ /* Interference edges with conjunctions */
+ for(Iterator conjiterator=conjunctions.iterator();conjiterator.hasNext();) {
+ GraphNode gn2=(GraphNode)conjiterator.next();
+ TermNode tn2=(TermNode)gn2.getOwner();
+ Conjunction conj=tn2.getConjunction();
+ Constraint constr=tn2.getConstraint();
for(int i=0;i<conj.size();i++) {
DNFPredicate dp=conj.get(i);
- if (AbstractInterferes.interferes(ar,dp)) {
+ if (abstractinterferes.scopeinterfereswithpredicate(sn,dp)||
+ AbstractInterferes.interfereswithquantifier(sn.getDescriptor(),sn.getSatisfy(),constr)) {
GraphNode.Edge e=new GraphNode.Edge("interferes",gn2);
- gn.addEdge(e);
+ GraphNode gnconseq=(GraphNode)consequence.get(sn);
+ gnconseq.addEdge(e);
break;
}
}
}
+
+ /* Now see if this could effect other model defintion rules */
+ for(int i=0;i<state.vRules.size();i++) {
+ Rule r=(Rule) state.vRules.get(i);
+ if (AbstractInterferes.interfereswithrule(sn.getDescriptor(),sn.getSatisfy(),r,true)) {
+ GraphNode scopenode=(GraphNode)scopesatisfy.get(r);
+ GraphNode.Edge e=new GraphNode.Edge("interferes",scopenode);
+ GraphNode gnconseq=(GraphNode)consequence.get(sn);
+ gnconseq.addEdge(e);
+ }
+ if (AbstractInterferes.interfereswithrule(sn.getDescriptor(),sn.getSatisfy(),r,false)) {
+ GraphNode scopenode=(GraphNode)scopefalsify.get(r);
+ GraphNode.Edge e=new GraphNode.Edge("interferes",scopenode);
+ GraphNode gnconseq=(GraphNode)consequence.get(sn);
+ gnconseq.addEdge(e);
+ }
+ }
}
}
-
+ /** This method generates the abstract repair nodes. */
void generaterepairnodes() {
+ /* Generate repairs of conjunctions */
for(Iterator conjiterator=conjunctions.iterator();conjiterator.hasNext();) {
GraphNode gn=(GraphNode)conjiterator.next();
TermNode tn=(TermNode)gn.getOwner();
Conjunction conj=tn.getConjunction();
+ loop:
for(int i=0;i<conj.size();i++) {
DNFPredicate dp=conj.get(i);
- int[] array=dp.getPredicate().getRepairs(dp.isNegated());
+ int[] array=dp.getPredicate().getRepairs(dp.isNegated(),this);
Descriptor d=dp.getPredicate().getDescriptor();
+ if ((dp.getPredicate() instanceof ExprPredicate)&&
+ (((ExprPredicate)dp.getPredicate()).getType()==ExprPredicate.SIZE)) {
+ boolean neg=dp.isNegated();
+ Opcode op=((ExprPredicate)dp.getPredicate()).getOp();
+ int size=((ExprPredicate)dp.getPredicate()).rightSize();
+ op=Opcode.translateOpcode(neg,op);
+ if (((size==1)&&(op==Opcode.EQ))||
+ ((size!=1)&&(op==Opcode.NE))||
+ ((size<=1)&&(op==Opcode.GE))||
+ ((size<1)&&(op==Opcode.GT))||
+ ((size>1)&&(op==Opcode.LT))||
+ ((size>=1)&&(op==Opcode.LE))) {
+ for(int i2=0;i2<conj.size();i2++) {
+ DNFPredicate dp2=conj.get(i2);
+ if ((dp2.getPredicate() instanceof ExprPredicate)&&
+ (((ExprPredicate)dp2.getPredicate()).getType()==ExprPredicate.COMPARISON)) {
+ if (equivalent(((SizeofExpr)((OpExpr)((ExprPredicate)dp.getPredicate()).expr).left).setexpr,
+ (RelationExpr)((OpExpr)((ExprPredicate)dp2.getPredicate()).expr).left))
+ continue loop; // comparison predicate ensure that size expr is true - no need to generate abstract repairs...
+ }
+ }
+ }
+ }
+
for(int j=0;j<array.length;j++) {
- AbstractRepair ar=new AbstractRepair(dp,array[j],d);
+ AbstractRepair ar=new AbstractRepair(dp,array[j],d,sources);
TermNode tn2=new TermNode(ar);
- GraphNode gn2=new GraphNode(gn.getLabel()+"-"+i+","+j,tn2);
+ GraphNode gn2=new GraphNode(gn.getLabel()+"A"+i+"B"+ar.type(),gn.getTextLabel()+" #"+i+" "+ar.type(),tn2);
GraphNode.Edge e=new GraphNode.Edge("abstract",gn2);
gn.addEdge(e);
+ if (!predtoabstractmap.containsKey(dp))
+ predtoabstractmap.put(dp,new HashSet());
+ ((Set)predtoabstractmap.get(dp)).add(gn2);
abstractrepair.add(gn2);
}
}
}
+ /* Generate additional abstract repairs */
+ Vector setdescriptors=state.stSets.getAllDescriptors();
+ for(int i=0;i<setdescriptors.size();i++) {
+ SetDescriptor sd=(SetDescriptor)setdescriptors.get(i);
+
+ VarExpr ve=new VarExpr("DUMMY");
+ InclusionPredicate ip=new InclusionPredicate(ve,new SetExpr(sd));
+ DNFPredicate tp=new DNFPredicate(false,ip);
+ AbstractRepair ar=new AbstractRepair(tp, AbstractRepair.ADDTOSET, sd,sources);
+ TermNode tn=new TermNode(ar);
+ GraphNode gn=new GraphNode("AbstractAddSetRule"+i,tn);
+ if (!predtoabstractmap.containsKey(tp))
+ predtoabstractmap.put(tp,new HashSet());
+ ((Set)predtoabstractmap.get(tp)).add(gn);
+ abstractrepair.add(gn);
+ abstractrepairadd.add(gn);
+ abstractadd.put(sd,gn);
+
+ DNFPredicate tp2=new DNFPredicate(true,ip);
+ AbstractRepair ar2=new AbstractRepair(tp2, AbstractRepair.REMOVEFROMSET, sd,sources);
+ TermNode tn2=new TermNode(ar2);
+ GraphNode gn2=new GraphNode("AbstractRemSetRule"+i,tn2);
+ if (!predtoabstractmap.containsKey(tp2))
+ predtoabstractmap.put(tp2,new HashSet());
+ ((Set)predtoabstractmap.get(tp2)).add(gn2);
+ abstractrepair.add(gn2);
+ abstractrepairadd.add(gn2);
+ abstractremove.put(sd,gn2);
+ }
+
+ Vector relationdescriptors=state.stRelations.getAllDescriptors();
+ for(int i=0;i<relationdescriptors.size();i++) {
+ RelationDescriptor rd=(RelationDescriptor)relationdescriptors.get(i);
+ VarDescriptor vd1=new VarDescriptor("DUMMY1");
+ VarExpr ve2=new VarExpr("DUMMY2");
+
+ InclusionPredicate ip=new InclusionPredicate(ve2,new ImageSetExpr(vd1, rd));
+
+ DNFPredicate tp=new DNFPredicate(false,ip);
+ AbstractRepair ar=new AbstractRepair(tp, AbstractRepair.ADDTORELATION, rd,sources);
+ TermNode tn=new TermNode(ar);
+ GraphNode gn=new GraphNode("AbstractAddRelRule"+i,tn);
+ if (!predtoabstractmap.containsKey(tp))
+ predtoabstractmap.put(tp,new HashSet());
+ ((Set)predtoabstractmap.get(tp)).add(gn);
+ abstractrepair.add(gn);
+ abstractrepairadd.add(gn);
+ abstractadd.put(rd,gn);
+
+ DNFPredicate tp2=new DNFPredicate(true,ip);
+ AbstractRepair ar2=new AbstractRepair(tp2, AbstractRepair.REMOVEFROMRELATION, rd,sources);
+ TermNode tn2=new TermNode(ar2);
+ GraphNode gn2=new GraphNode("AbstractRemRelRule"+i,tn2);
+ if (!predtoabstractmap.containsKey(tp2))
+ predtoabstractmap.put(tp2,new HashSet());
+ ((Set)predtoabstractmap.get(tp2)).add(gn2);
+ abstractrepair.add(gn2);
+ abstractrepairadd.add(gn2);
+ abstractremove.put(rd,gn2);
+ }
+ }
+
+ int compensationcount=0;
+ void generatecompensationnodes() {
+ for(int i=0;i<state.vRules.size();i++) {
+ Rule r=(Rule) state.vRules.get(i);
+ Vector possiblerules=new Vector();
+
+ for(int j=0;j<(r.numQuantifiers()+r.getDNFNegGuardExpr().size());j++) {
+ GraphNode gn=(GraphNode)scopesatisfy.get(r);
+ TermNode tn=(TermNode) gn.getOwner();
+ ScopeNode sn=tn.getScope();
+ MultUpdateNode mun=new MultUpdateNode(sn);
+ TermNode tn2=new TermNode(mun);
+ GraphNode gn2=new GraphNode("CompRem"+compensationcount,tn2);
+ UpdateNode un=new UpdateNode(r);
+
+ if (j<r.numQuantifiers()) {
+ /* Remove quantifier */
+ Quantifier q=r.getQuantifier(j);
+ if (q instanceof RelationQuantifier) {
+ RelationQuantifier rq=(RelationQuantifier)q;
+ TupleOfExpr toe=new TupleOfExpr(new VarExpr(rq.x),new VarExpr(rq.y),rq.relation);
+ toe.td=ReservedTypeDescriptor.INT;
+ Updates u=new Updates(toe,true);
+ un.addUpdate(u);
+ if (abstractremove.containsKey(rq.relation)) {
+ GraphNode agn=(GraphNode)abstractremove.get(rq.relation);
+ GraphNode.Edge e=new GraphNode.Edge("requires",agn);
+ gn2.addEdge(e);
+ } else {
+ continue; /* Abstract repair doesn't exist */
+ }
+ } else if (q instanceof SetQuantifier) {
+ SetQuantifier sq=(SetQuantifier)q;
+ ElementOfExpr eoe=new ElementOfExpr(new VarExpr(sq.var),sq.set);
+ eoe.td=ReservedTypeDescriptor.INT;
+ Updates u=new Updates(eoe,true);
+ un.addUpdate(u);
+ if (abstractremove.containsKey(sq.set)) {
+ GraphNode agn=(GraphNode)abstractremove.get(sq.set);
+ GraphNode.Edge e=new GraphNode.Edge("requires",agn);
+ gn2.addEdge(e);
+ } else {
+ continue; /* Abstract repair doesn't exist */
+ }
+ } else {
+ continue;
+ }
+ } else {
+ /* Negate conjunction */
+ int c=j-r.numQuantifiers();
+ if (!processconjunction(un,r.getDNFNegGuardExpr().get(c),null)) {
+ continue;
+ }
+ }
+ if (!un.checkupdates()) /* Make sure we have a good update */
+ continue;
+
+ mun.addUpdate(un);
+ GraphNode.Edge e=new GraphNode.Edge("abstract"+compensationcount,gn2);
+ compensationcount++;
+ gn.addEdge(e);
+ updatenodes.add(gn2);
+ }
+ }
}
void generatedatastructureupdatenodes() {
for(Iterator absiterator=abstractrepair.iterator();absiterator.hasNext();) {
GraphNode gn=(GraphNode)absiterator.next();
+ System.out.println("Analysing: "+gn.getTextLabel());
TermNode tn=(TermNode) gn.getOwner();
AbstractRepair ar=tn.getAbstract();
if (ar.getType()==AbstractRepair.ADDTOSET) {
- generateaddtoset(ar);
+ generateaddtosetrelation(gn,ar);
} else if (ar.getType()==AbstractRepair.REMOVEFROMSET) {
- generateremovefromset(ar);
+ generateremovefromsetrelation(gn,ar);
} else if (ar.getType()==AbstractRepair.ADDTORELATION) {
- generateaddtorelation(ar);
+ generateaddtosetrelation(gn,ar);
} else if (ar.getType()==AbstractRepair.REMOVEFROMRELATION) {
- generateremovefromrelation(ar);
+ generateremovefromsetrelation(gn,ar);
} else if (ar.getType()==AbstractRepair.MODIFYRELATION) {
- generatemodifyrelation(ar);
+ /* Generate remove/add pairs */
+ if (ar.needsRemoves(state))
+ generateremovefromsetrelation(gn,ar);
+ generateaddtosetrelation(gn,ar);
+ /* Generate atomic modify */
+ generatemodifyrelation(gn,ar);
}
}
}
- void generateaddtoset(AbstractRepair ar) {
+
+ /** This method generates concrete data structure updates which
+ * remove an object (or tuple) from a set (or relation).*/
+
+ int removefromcount=0;
+ void generateremovefromsetrelation(GraphNode gn,AbstractRepair ar) {
+ /* Construct the set of all rules which could add something to the given set or relation */
+
+ Vector possiblerules=new Vector();
for(int i=0;i<state.vRules.size();i++) {
Rule r=(Rule) state.vRules.get(i);
- if (r.getInclusion() instanceof SetInclusion) {
- if (ar.getDescriptor()==((SetInclusion)r.getInclusion()).getSet()) {
- //Generate add instruction
-
+ if ((r.getInclusion() instanceof SetInclusion)&&
+ (ar.getDescriptor()==((SetInclusion)r.getInclusion()).getSet()))
+ possiblerules.add(r);
+ if ((r.getInclusion() instanceof RelationInclusion)&&
+ (ar.getDescriptor()==((RelationInclusion)r.getInclusion()).getRelation()))
+ possiblerules.add(r);
+ }
+ if (possiblerules.size()==0)
+ return;
+
+ /* Loop through different ways of falsifying each of these rules */
+ int[] count=new int[possiblerules.size()];
+ while(remains(count,possiblerules,true)) {
+ MultUpdateNode mun=new MultUpdateNode(ar,MultUpdateNode.REMOVE);
+ TermNode tn=new TermNode(mun);
+ GraphNode gn2=new GraphNode("UpdateRem"+removefromcount,tn);
+
+ boolean goodflag=true;
+ for(int i=0;i<possiblerules.size();i++) {
+ Rule r=(Rule)possiblerules.get(i);
+ UpdateNode un=new UpdateNode(r);
+ if (count[i]<r.numQuantifiers()) {
+ /* Remove quantifier */
+ Quantifier q=r.getQuantifier(count[i]);
+ if (q instanceof RelationQuantifier) {
+ RelationQuantifier rq=(RelationQuantifier)q;
+ TupleOfExpr toe=new TupleOfExpr(new VarExpr(rq.x),new VarExpr(rq.y),rq.relation);
+ toe.td=ReservedTypeDescriptor.INT;
+ Updates u=new Updates(toe,true);
+ un.addUpdate(u);
+ if (abstractremove.containsKey(rq.relation)) {
+ GraphNode agn=(GraphNode)abstractremove.get(rq.relation);
+ GraphNode.Edge e=new GraphNode.Edge("requires",agn);
+ gn2.addEdge(e);
+ } else {
+ goodflag=false;break; /* Abstract repair doesn't exist */
+ }
+ } else if (q instanceof SetQuantifier) {
+ SetQuantifier sq=(SetQuantifier)q;
+ ElementOfExpr eoe=new ElementOfExpr(new VarExpr(sq.var),sq.set);
+ eoe.td=ReservedTypeDescriptor.INT;
+ Updates u=new Updates(eoe,true);
+ un.addUpdate(u);
+ if (abstractremove.containsKey(sq.set)) {
+ GraphNode agn=(GraphNode)abstractremove.get(sq.set);
+ GraphNode.Edge e=new GraphNode.Edge("requires",agn);
+ gn2.addEdge(e);
+ } else {
+ goodflag=false;break; /* Abstract repair doesn't exist */
+ }
+ } else {goodflag=false;break;}
+ } else {
+ int c=count[i]-r.numQuantifiers();
+ if (!processconjunction(un,r.getDNFNegGuardExpr().get(c),null)) {
+ goodflag=false;break;
+ }
+ }
+ if (!un.checkupdates()) {
+ goodflag=false;
+ break;
}
+ mun.addUpdate(un);
}
+ if (goodflag) {
+ GraphNode.Edge e=new GraphNode.Edge("abstract"+(removefromcount++),gn2);
+ gn.addEdge(e);
+ updatenodes.add(gn2);
+ }
+ increment(count,possiblerules,true);
}
}
- void generatescopenodes() {
+ /** This method increments to the next possibility. */
+
+ static private void increment(int count[], Vector rules,boolean isremove) {
+ count[0]++;
+ for(int i=0;i<(rules.size()-1);i++) {
+ int num=isremove?(((Rule)rules.get(i)).numQuantifiers()+(((Rule)rules.get(i)).getDNFNegGuardExpr().size())):((Rule)rules.get(i)).getDNFGuardExpr().size();
+ if (count[i]>=num) {
+ count[i+1]++;
+ count[i]=0;
+ } else break;
+ }
+ }
+
+
+ /** This method test if there remain any possibilities to loop
+ * through. */
+ static private boolean remains(int count[], Vector rules, boolean isremove) {
+ for(int i=0;i<rules.size();i++) {
+ int num=isremove?(((Rule)rules.get(i)).numQuantifiers()+(((Rule)rules.get(i)).getDNFNegGuardExpr().size())):((Rule)rules.get(i)).getDNFGuardExpr().size();
+ if (count[i]>=num) {
+ return false;
+ }
+ }
+ return true;
+ }
+
+ /** This method generates data structure updates to implement the
+ * abstract atomic modification specified by ar. */
+
+ int modifycount=0;
+ void generatemodifyrelation(GraphNode gn, AbstractRepair ar) {
+ RelationDescriptor rd=(RelationDescriptor)ar.getDescriptor();
+ ExprPredicate exprPredicate=(ExprPredicate)ar.getPredicate().getPredicate();
+ boolean inverted=exprPredicate.inverted();
+ int leftindex=0;
+ int rightindex=1;
+ if (inverted)
+ leftindex=2;
+ else
+ rightindex=2;
+
+ // construct set of possible rules
+ Vector possiblerules=new Vector();
for(int i=0;i<state.vRules.size();i++) {
Rule r=(Rule) state.vRules.get(i);
- ScopeNode satisfy=new ScopeNode(r,true);
- TermNode tnsatisfy=new TermNode(satisfy);
- GraphNode gnsatisfy=new GraphNode("Satisfy Rule"+i,tnsatisfy);
+ if ((r.getInclusion() instanceof RelationInclusion)&&
+ (rd==((RelationInclusion)r.getInclusion()).getRelation()))
+ possiblerules.add(r);
+ }
+ if (possiblerules.size()==0)
+ return;
- ScopeNode falsify=new ScopeNode(r,false);
- TermNode tnfalsify=new TermNode(falsify);
- GraphNode gnfalsify=new GraphNode("Falsify Rule"+i,tnfalsify);
- scopesatisfy.put(r,gnsatisfy);
- scopefalsify.put(r,gnfalsify);
- scopenodes.add(gnsatisfy);
- scopenodes.add(gnfalsify);
+ // increment through this set
+ int[] count=new int[possiblerules.size()];
+ while(remains(count,possiblerules,false)) {
+ MultUpdateNode mun=new MultUpdateNode(ar,MultUpdateNode.MODIFY);
+ TermNode tn=new TermNode(mun);
+ GraphNode gn2=new GraphNode("UpdateMod"+modifycount,tn);
+
+ boolean goodflag=true;
+ for(int i=0;i<possiblerules.size();i++) {
+ Rule r=(Rule)possiblerules.get(i);
+ UpdateNode un=new UpdateNode(r);
+
+ int c=count[i];
+ if (!processconjunction(un,r.getDNFGuardExpr().get(c),null)) {
+ goodflag=false;break;
+ }
+ RelationInclusion ri=(RelationInclusion)r.getInclusion();
+ if (!(ri.getLeftExpr() instanceof VarExpr)) {
+ if (ri.getLeftExpr().isValue(ri.getRelation().getDomain().getType())) {
+ Updates up=new Updates(ri.getLeftExpr(),leftindex,ri.getRelation().getDomain().getType());
+ un.addUpdate(up);
+ } else {
+ if (inverted)
+ goodflag=false;
+ else un.addInvariant(ri.getLeftExpr());
+ }
+ } else {
+ VarDescriptor vd=((VarExpr)ri.getLeftExpr()).getVar();
+ if (vd.isGlobal()) {
+ Updates up=new Updates(ri.getLeftExpr(),leftindex,null);
+ un.addUpdate(up);
+ } else if (inverted)
+ goodflag=false;
+ }
+ if (!(ri.getRightExpr() instanceof VarExpr)) {
+ if (ri.getRightExpr().isValue(ri.getRelation().getRange().getType())) {
+ Updates up=new Updates(ri.getRightExpr(),rightindex,ri.getRelation().getRange().getType());
+ un.addUpdate(up);
+ } else {
+ if (!inverted)
+ goodflag=false;
+ else
+ un.addInvariant(ri.getLeftExpr());
+ }
+ } else {
+ VarDescriptor vd=((VarExpr)ri.getRightExpr()).getVar();
+ if (vd.isGlobal()) {
+ Updates up=new Updates(ri.getRightExpr(),rightindex,null);
+ un.addUpdate(up);
+ } else if (!inverted)
+ goodflag=false;
+ }
+
+ if (!un.checkupdates()) {
+ goodflag=false;
+ break;
+ }
+ mun.addUpdate(un);
+ }
+ if (goodflag) {
+ GraphNode.Edge e=new GraphNode.Edge("abstract"+modifycount,gn2);
+ modifycount++;
+ gn.addEdge(e);
+ updatenodes.add(gn2);
+ }
+ increment(count,possiblerules,false);
+ }
+ }
+
+ /** Generate concrete data structure update to add an object(or
+ * tuple) to a set (or relation). */
+
+ static int addtocount=0;
+ void generateaddtosetrelation(GraphNode gn, AbstractRepair ar) {
+ for(int i=0;i<state.vRules.size();i++) {
+ Rule r=(Rule) state.vRules.get(i);
+
+
+ /* See if this is a good rule*/
+ if ((r.getInclusion() instanceof SetInclusion&&
+ ar.getDescriptor()==((SetInclusion)r.getInclusion()).getSet())||
+ (r.getInclusion() instanceof RelationInclusion&&
+ ar.getDescriptor()==((RelationInclusion)r.getInclusion()).getRelation())) {
+
+ /* First solve for quantifiers */
+ Vector bindings=new Vector();
+ /* Construct bindings */
+
+ Hashtable setmapping=new Hashtable();
+ System.out.println("Attempting to construct bindings");
+
+ if (!constructbindings(bindings,r,ar,setmapping,false))
+ continue;
+ System.out.println("Bindings constructed");
+ //Generate add instruction
+ DNFRule dnfrule=r.getDNFGuardExpr();
+ endloop:
+ for(int j=0;j<dnfrule.size();j++) {
+ Inclusion inc=r.getInclusion();
+ UpdateNode un=new UpdateNode(r);
+ un.addBindings(bindings);
+ /* Now build update for tuple/set inclusion condition */
+ if(inc instanceof SetInclusion) {
+ SetInclusion si=(SetInclusion)inc;
+ Expr e=si.elementexpr;
+
+ while(e instanceof CastExpr) {
+ CastExpr ce=(CastExpr)e;
+ if (ce.getType()!=si.getSet().getType())
+ continue endloop;
+ e=ce.getExpr();
+ }
+
+ if (!(e instanceof VarExpr)) {
+ if (e.isValue(si.getSet().getType())) {
+ Updates up=new Updates(e,0,si.getSet().getType());
+ un.addUpdate(up);
+ } else {
+ /* We're an add to set*/
+ ArrayAnalysis.AccessPath rap=arrayanalysis.analyzeExpr(r,e);
+ SetDescriptor set=sources.setSource(si.getSet())?
+ sources.getSourceSet(si.getSet()):null;
+ if (set==null)
+ continue;
+ ArrayAnalysis.AccessPath ap=arrayanalysis.getSet(set);
+ if (rap==ArrayAnalysis.AccessPath.NONE)
+ continue;
+ if (!rap.equal(ap))
+ continue;
+ if (!constructarrayupdate(un, e, rap, 0))
+ continue;
+ }
+ } else {
+ VarDescriptor vd=((VarExpr)e).getVar();
+ if (vd.isGlobal()) {
+ Updates up=new Updates(e,0,null);
+ un.addUpdate(up);
+ }
+ }
+ } else if (inc instanceof RelationInclusion) {
+ RelationInclusion ri=(RelationInclusion)inc;
+
+ Expr e=ri.getLeftExpr();
+
+ while(e instanceof CastExpr) {
+ CastExpr ce=(CastExpr)e;
+ if (ce.getType()!=ri.getRelation().getDomain().getType())
+ continue endloop;
+ e=ce.getExpr();
+ }
+ if (!(e instanceof VarExpr)) {
+ if (e.isValue(ri.getRelation().getDomain().getType())) {
+ Updates up=new Updates(e,0,ri.getRelation().getDomain().getType());
+ if (ar.getDomainSet()!=null)
+ setmapping.put(e,ar.getDomainSet());
+ un.addUpdate(up);
+ } else {
+ /* We don't handly relation modifies */
+ if (ar.getType()==AbstractRepair.MODIFYRELATION)
+ continue;
+ /* We're an add to relation*/
+ ArrayAnalysis.AccessPath rap=arrayanalysis.analyzeExpr(r,e);
+ SetDescriptor set=sources.relsetSource(ri.getRelation(),true /* Domain*/)?
+ sources.relgetSourceSet(ri.getRelation(),true):null;
+ if (set==null)
+ continue;
+ ArrayAnalysis.AccessPath ap=arrayanalysis.getSet(set);
+ if (rap==ArrayAnalysis.AccessPath.NONE||
+ !rap.equal(ap)||
+ !constructarrayupdate(un, e, rap, 0))
+ continue;
+ if (ar.getDomainSet()!=null)
+ setmapping.put(e,ar.getDomainSet());
+
+ }
+ } else {
+ VarDescriptor vd=((VarExpr)e).getVar();
+ if (vd.isGlobal()) {
+ Updates up=new Updates(e,0,null);
+ if (ar.getDomainSet()!=null)
+ setmapping.put(e,ar.getDomainSet());
+ un.addUpdate(up);
+ }
+ }
+
+ e=ri.getRightExpr();
+
+ while(e instanceof CastExpr) {
+ CastExpr ce=(CastExpr)e;
+ if (ce.getType()!=ri.getRelation().getRange().getType())
+ continue endloop;
+ e=ce.getExpr();
+ }
+ if (!(e instanceof VarExpr)) {
+ if (e.isValue(ri.getRelation().getRange().getType())) {
+ Updates up=new Updates(e,1,ri.getRelation().getRange().getType());
+ un.addUpdate(up);
+ } else {
+ /* We don't handly relation modifies */
+ if (ar.getType()==AbstractRepair.MODIFYRELATION)
+ continue;
+ /* We're an add to relation*/
+ ArrayAnalysis.AccessPath rap=arrayanalysis.analyzeExpr(r,e);
+ SetDescriptor set=sources.relsetSource(ri.getRelation(),false /* Range*/)?
+ sources.relgetSourceSet(ri.getRelation(),false):null;
+ if (set==null)
+ continue;
+ ArrayAnalysis.AccessPath ap=arrayanalysis.getSet(set);
+
+ if (rap==ArrayAnalysis.AccessPath.NONE||
+ !rap.equal(ap)||
+ !constructarrayupdate(un, e, rap, 1))
+ continue;
+ if (ar.getRangeSet()!=null)
+ setmapping.put(e,ar.getRangeSet());
+ }
+ } else {
+ VarDescriptor vd=((VarExpr)e).getVar();
+ if (vd.isGlobal()) {
+ Updates up=new Updates(e,1,null);
+ if (ar.getRangeSet()!=null)
+ setmapping.put(e,ar.getRangeSet());
+ un.addUpdate(up);
+ }
+ }
+ }
+ System.out.println("Built inclusion condition updates.");
+ //Finally build necessary updates to satisfy conjunction
+ RuleConjunction ruleconj=dnfrule.get(j);
+
+ /* Add in updates for quantifiers */
+ MultUpdateNode mun=new MultUpdateNode(ar,MultUpdateNode.ADD);
+ TermNode tn=new TermNode(mun);
+ GraphNode gn2=new GraphNode("UpdateAdd"+addtocount,tn);
+
+ if (debugmsg("Start processing quantifiers")&&
+ processquantifiers(gn2,un, r,setmapping)&&
+ debugmsg("Finished processing quantifiers")&&
+ processconjunction(un,ruleconj,setmapping)&&
+ debugmsg("Finished processing conjunction")&&
+ un.checkupdates()&&
+ debugmsg("Updates checked")) {
+ mun.addUpdate(un);
+ GraphNode.Edge e=new GraphNode.Edge("abstract"+addtocount,gn2);
+ addtocount++;
+ gn.addEdge(e);
+ updatenodes.add(gn2);
+ }
+ }
+ }
+ }
+ }
+
+ boolean debugmsg(String st) {
+ System.out.println(st);
+ return true;
+ }
+
+ boolean constructarrayupdate(UpdateNode un, Expr lexpr, ArrayAnalysis.AccessPath ap, int slotnumber) {
+ System.out.println("Constructing array update");
+ Expr e=null;
+ for (int i=ap.numFields()-1;i>=0;i--) {
+ if (e==null)
+ e=lexpr;
+ else
+ e=((DotExpr)e).getExpr();
+
+ while (e instanceof CastExpr)
+ e=((CastExpr)e).getExpr();
+
+ DotExpr de=(DotExpr)e;
+ FieldDescriptor fd=ap.getField(i);
+ if (fd instanceof ArrayDescriptor) {
+ // We have an ArrayDescriptor!
+ Expr index=de.getIndex();
+ if (!index.isValue(null)) {/* Not assignable */
+ System.out.println("ERROR:Index isn't assignable");
+ return false;
+ }
+ Updates updates=new Updates(index,i,ap,lexpr,slotnumber);
+ un.addUpdate(updates);
+ }
+ }
+ return true;
+ }
+
+ /** This method constructs bindings for an update using rule
+ * r. The boolean flag isremoval indicates that the update
+ * performs a removal. The function returns true if it is able to
+ * generate a valid set of bindings and false otherwise. */
+
+ boolean constructbindings(Vector bindings, Rule r, AbstractRepair ar, Hashtable setmapping, boolean isremoval) {
+ boolean goodupdate=true;
+ Inclusion inc=r.getInclusion();
+
+ for(Iterator iterator=r.quantifiers();iterator.hasNext();) {
+ Quantifier q=(Quantifier)iterator.next();
+ if ((q instanceof SetQuantifier)||(q instanceof ForQuantifier)) {
+ VarDescriptor vd=null;
+ SetDescriptor set=null;
+ if (q instanceof SetQuantifier) {
+ vd=((SetQuantifier)q).getVar();
+ set=((SetQuantifier)q).getSet();
+ } else {
+ vd=((ForQuantifier)q).getVar();
+ }
+ if(inc instanceof SetInclusion) {
+ SetInclusion si=(SetInclusion)inc;
+ Expr tmpe=si.elementexpr;
+ Expr e=si.elementexpr;
+
+ while(e instanceof CastExpr) {
+ CastExpr ce=(CastExpr)e;
+ if (ce.getType()!=si.getSet().getType())
+ return false;
+ e=ce.getExpr();
+ }
+
+ if ((e instanceof VarExpr)&&
+ (((VarExpr)e).getVar()==vd)) {
+ /* Can solve for v */
+ if (!si.getSet().getType().isSubtypeOf(set.getType()))
+ return false;
+ Binding binding=new Binding(vd,0);
+ bindings.add(binding);
+ } else {
+ goodupdate=false;
+ }
+ } else if (inc instanceof RelationInclusion) {
+ RelationInclusion ri=(RelationInclusion)inc;
+ boolean f1=true;
+ boolean f2=true;
+
+ Expr e=ri.getLeftExpr();
+
+ while(e instanceof CastExpr) {
+ CastExpr ce=(CastExpr)e;
+ if (ce.getType()!=ri.getRelation().getDomain().getType())
+ return false;
+ e=ce.getExpr();
+ }
+
+ if ((e instanceof VarExpr)&&
+ (((VarExpr)e).getVar()==vd)) {
+ /* Can solve for v */
+ Binding binding=new Binding(vd,0);
+ if (!ri.getRelation().getDomain().getType().isSubtypeOf(set.getType()))
+ return false;
+ if (ar.getDomainSet()!=null)
+ setmapping.put(ri.getLeftExpr(),ar.getDomainSet());
+ bindings.add(binding);
+ } else f1=false;
+
+
+ e=ri.getRightExpr();
+
+ while(e instanceof CastExpr) {
+ CastExpr ce=(CastExpr)e;
+ if (ce.getType()!=ri.getRelation().getRange().getType())
+ return false;
+ e=ce.getExpr();
+ }
+
+ if ((e instanceof VarExpr)&&
+ (((VarExpr)e).getVar()==vd)) {
+ /* Can solve for v */
+ Binding binding=new Binding(vd,1);
+ if (!ri.getRelation().getRange().getType().isSubtypeOf(set.getType()))
+ return false;
+ if (ar.getRangeSet()!=null)
+ setmapping.put(ri.getRightExpr(),ar.getRangeSet());
+ bindings.add(binding);
+ } else f2=false;
+ if (!(f1||f2))
+ goodupdate=false;
+ } else throw new Error("Inclusion not recognized");
+ if (!goodupdate)
+ if (isremoval) {
+ /* Removals don't need bindings anymore
+ Binding binding=new Binding(vd);
+ bindings.add(binding);*/
+ goodupdate=true;
+ } else if (q instanceof SetQuantifier) {
+ /* Create new element to bind to */
+ // search if the set 'set' has a size
+ Binding binding=new Binding(vd,set,exactsize.getsize(set)==1);
+ bindings.add(binding);
+ goodupdate=true;
+
+ } else
+ goodupdate=false;
+ } else if (q instanceof RelationQuantifier) {
+ RelationQuantifier rq=(RelationQuantifier)q;
+ for(int k=0;k<2;k++) {
+ VarDescriptor vd=(k==0)?rq.x:rq.y;
+ TypeDescriptor td=(k==0)?rq.getRelation().getDomain().getType():rq.getRelation().getRange().getType();
+ if(inc instanceof SetInclusion) {
+ SetInclusion si=(SetInclusion)inc;
+
+ Expr e=si.elementexpr;
+
+ while(e instanceof CastExpr) {
+ CastExpr ce=(CastExpr)e;
+ if (ce.getType()!=td)
+ return false;
+ e=ce.getExpr();
+ }
+
+ if ((e instanceof VarExpr)&&
+ (((VarExpr)e).getVar()==vd)) {
+ /* Can solve for v */
+ Binding binding=new Binding(vd,0);
+
+ if (!si.getSet().getType().isSubtypeOf(td))
+ return false;
+ bindings.add(binding);
+ } else
+ goodupdate=false;
+ } else if (inc instanceof RelationInclusion) {
+ RelationInclusion ri=(RelationInclusion)inc;
+ boolean f1=true;
+ boolean f2=true;
+
+
+ Expr e=ri.getLeftExpr();
+
+ while(e instanceof CastExpr) {
+ CastExpr ce=(CastExpr)e;
+ if (ce.getType()!=ri.getRelation().getDomain().getType())
+ return false;
+ e=ce.getExpr();
+ }
+ if ((ri.getLeftExpr() instanceof VarExpr)&&
+ (((VarExpr)ri.getLeftExpr()).getVar()==vd)) {
+ /* Can solve for v */
+ Binding binding=new Binding(vd,0);
+ if (!ri.getRelation().getDomain().getType().isSubtypeOf(td))
+ return false;
+ if (ar.getDomainSet()!=null)
+ setmapping.put(ri.getLeftExpr(),ar.getDomainSet());
+ bindings.add(binding);
+ } else f1=false;
+
+
+ e=ri.getRightExpr();
+
+ while(e instanceof CastExpr) {
+ CastExpr ce=(CastExpr)e;
+ if (ce.getType()!=ri.getRelation().getRange().getType())
+ return false;
+ e=ce.getExpr();
+ }
+ if ((ri.getRightExpr() instanceof VarExpr)&&
+ (((VarExpr)ri.getRightExpr()).getVar()==vd)) {
+ /* Can solve for v */
+ Binding binding=new Binding(vd,1);
+ if (!ri.getRelation().getRange().getType().isSubtypeOf(td))
+ return false;
+ if (ar.getRangeSet()!=null)
+ setmapping.put(ri.getRightExpr(),ar.getRangeSet());
+ bindings.add(binding);
+ } else f2=false;
+ if (!(f1||f2))
+ goodupdate=false;
+ } else throw new Error("Inclusion not recognized");
+ if (!goodupdate)
+ if (isremoval) {
+ /* Removals don't need bindings anymore
+ Binding binding=new Binding(vd);
+ bindings.add(binding);*/
+ goodupdate=true;
+ } else
+ break;
+ }
+ if (!goodupdate)
+ break;
+ } else throw new Error("Quantifier not recognized");
+ }
+ return goodupdate;
+ }
+
+ /** Adds updates that add an item to the appropriate set or
+ * relation quantified over by the model definition rule.. */
+
+ boolean processquantifiers(GraphNode gn,UpdateNode un, Rule r,Hashtable setmapping) {
+ Inclusion inc=r.getInclusion();
+ for(Iterator iterator=r.quantifiers();iterator.hasNext();) {
+ Quantifier q=(Quantifier)iterator.next();
+ /* Add quantifier */
+ if (q instanceof RelationQuantifier) {
+ RelationQuantifier rq=(RelationQuantifier)q;
+ TupleOfExpr toe=new TupleOfExpr(new VarExpr(rq.x),new VarExpr(rq.y),rq.relation);
+ toe.td=ReservedTypeDescriptor.INT;
+ Updates u=new Updates(toe,false);
+ un.addUpdate(u);
+ if (abstractadd.containsKey(rq.relation)) {
+ GraphNode agn=(GraphNode)abstractadd.get(rq.relation);
+ GraphNode.Edge e=new GraphNode.Edge("requires",agn);
+ gn.addEdge(e);
+ } else {
+ return false;
+ }
+ } else if (q instanceof SetQuantifier) {
+ SetQuantifier sq=(SetQuantifier)q;
+ if (un.getBinding(sq.var).getType()==Binding.SEARCH) {
+ Binding b=un.getBinding(sq.var);
+ Constraint reqc=exactsize.getConstraint(b.getSet());
+ constraintdependence.requiresConstraint(gn,reqc);
+ continue; /* Don't need to ensure addition for search */
+ }
+ VarExpr ve=new VarExpr(sq.var);
+ SetDescriptor sd=findExpr(setmapping, ve);
+ if (sd!=null&&sd.isSubset(sq.set))
+ continue; /* this update is trivially true */
+
+ ElementOfExpr eoe=new ElementOfExpr(ve,sq.set);
+ eoe.td=ReservedTypeDescriptor.INT;
+ Updates u=new Updates(eoe,false);
+ un.addUpdate(u);
+ if (abstractadd.containsKey(sq.set)) {
+ GraphNode agn=(GraphNode)abstractadd.get(sq.set);
+ GraphNode.Edge e=new GraphNode.Edge("requires",agn);
+ gn.addEdge(e);
+ } else {
+ return false;
+ }
+ } else return false;
+ }
+ return true;
+ }
+
+ static SetDescriptor findExpr(Hashtable setmapping, Expr e) {
+ if (setmapping==null)
+ return null;
+ Set kset=setmapping.keySet();
+ for(Iterator it=kset.iterator();it.hasNext();) {
+ Expr expr=(Expr)it.next();
+ if (expr.equals(null,e)) {
+ return (SetDescriptor)setmapping.get(expr);
+ }
+ }
+ return null;
+ }
+
+ /** This method generates the necessary updates to satisfy the
+ * conjunction ruleconj. */
+
+ boolean processconjunction(UpdateNode un,RuleConjunction ruleconj,Hashtable setmapping) {
+ boolean okay=true;
+ for(int k=0;k<ruleconj.size();k++) {
+ DNFExpr de=ruleconj.get(k);
+ Expr e=de.getExpr();
+ if (e instanceof OpExpr) {
+ OpExpr ex=(OpExpr)de.getExpr();
+ Opcode op=ex.getOpcode();
+ Updates up=new Updates(ex.left,ex.right,op, de.getNegation());
+ un.addUpdate(up);
+ } else if (e instanceof ElementOfExpr) {
+ SetDescriptor sd=findExpr(setmapping, ((ElementOfExpr)e).element);
+ if (sd!=null&&sd.isSubset(((ElementOfExpr)e).set))
+ continue; /* this update is trivially true */
+ Updates up=new Updates(e,de.getNegation());
+ un.addUpdate(up);
+ } else if (e instanceof TupleOfExpr) {
+ Updates up=new Updates(e,de.getNegation());
+ un.addUpdate(up);
+ } else if (e instanceof BooleanLiteralExpr) {
+ boolean truth=((BooleanLiteralExpr)e).getValue();
+ if (de.getNegation())
+ truth=!truth;
+ if (!truth) {
+ okay=false;
+ break;
+ }
+ } else {
+ System.out.println(e.getClass().getName());
+ throw new Error("Unrecognized Expr");
+ }
+ }
+ return okay;
+ }
+
+ /** This method sees if when the quantifiers listed in set are
+ * fixed, whether there can be more than one unique binding for
+ * the constraint or model definition rule qs.*/
+ public boolean analyzeQuantifiers(Quantifiers qs,Set set) {
+ for(int i=0;i<qs.numQuantifiers();i++) {
+ Quantifier q=qs.getQuantifier(i);
+ if (set.contains(q))
+ continue;
+ if (q instanceof SetQuantifier) {
+ SetDescriptor sd=((SetQuantifier)q).getSet();
+ if (maxsize.getsize(sd)<=1&&
+ maxsize.getsize(sd)>=0)
+ continue;
+ } else if (q instanceof RelationQuantifier) {
+ RelationDescriptor rd=((RelationQuantifier)q).getRelation();
+ if (maxsize.getsize(rd)<=1&&
+ maxsize.getsize(rd)>=0)
+ continue;
+ }
+ return false;
+ }
+ return true;
+ }
+
+ public boolean mutuallyexclusive(SetDescriptor sd1, SetDescriptor sd2) {
+ if (mutualexclusive(sd1,sd2)||
+ mutualexclusive(sd2,sd1))
+ return true;
+ else
+ return false;
+ }
+
+ private boolean mutualexclusive(SetDescriptor sd1, SetDescriptor sd2) {
+ Vector rules=state.vRules;
+ for(int i=0;i<rules.size();i++) {
+ Rule r=(Rule)rules.get(i);
+ if (r.getInclusion().getTargetDescriptors().contains(sd1)) {
+ /* Rule may add items to sd1 */
+ SetInclusion si=(SetInclusion)r.getInclusion();
+ Expr ve=si.getExpr();
+ DNFRule drule=r.getDNFGuardExpr();
+ for(int j=0;j<drule.size();j++) {
+ RuleConjunction rconj=drule.get(j);
+ boolean containsexclusion=false;
+ for (int k=0;k<rconj.size();k++) {
+ DNFExpr dexpr=rconj.get(k);
+ if (dexpr.getNegation()&&
+ dexpr.getExpr() instanceof ElementOfExpr&&
+ ((ElementOfExpr)dexpr.getExpr()).element.equals(null,ve)) {
+ SetDescriptor sd=((ElementOfExpr)dexpr.getExpr()).set;
+ if (sd.isSubset(sd2))
+ containsexclusion=true;
+ }
+ }
+ if (!containsexclusion)
+ return false;
+ }
+ }
+ }
+ return true;
+ }
+
+ boolean equivalent(SetExpr se, RelationExpr re) {
+ if (!(se instanceof ImageSetExpr))
+ return false;
+ ImageSetExpr ise=(ImageSetExpr)se;
+ while(re!=null&&ise!=null) {
+ if (re.getRelation()!=ise.getRelation())
+ return false;
+ if (re.inverted()!=ise.inverted())
+ return false;
+ if (ise.isimageset) {
+ ise=ise.getImageSetExpr();
+ if (!(re.getExpr() instanceof RelationExpr))
+ return false;
+ re=(RelationExpr)re.getExpr();
+ } else {
+ if (!(re.getExpr() instanceof VarExpr))
+ return false;
+ if (((VarExpr)re.getExpr()).getVar()==ise.getVar())
+ return true; //everything matches
+ return false;
+ }
}
+ return false;
}
}
projects / repair.git / blobdiff