[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#inScheme -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#hasTopConcept -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#topConceptOf -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#prefLabel -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#altLabel -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#hiddenLabel -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#notation -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#note -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#changeNote -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#definition -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#editorialNote -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#example -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#historyNote -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#scopeNote -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#semanticRelation -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#broader -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#narrower -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#related -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#broaderTransitive -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#narrowerTransitive -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#member -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#memberList -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#mappingRelation -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#broadMatch -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#narrowMatch -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#relatedMatch -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#exactMatch -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.rdf.rdfxml.parser.TripleHandlers - Usage of rdf vocabulary: http://www.w3.org/2004/02/skos/core#closeMatch -> http://www.w3.org/1999/02/22-rdf-syntax-ns#type -> http://www.w3.org/1999/02/22-rdf-syntax-ns#Property
[main] INFO org.semanticweb.owlapi.io.DocumentSources - URL connection input stream is compressed using gzip
[main] INFO org.semanticweb.owlapi.io.DocumentSources - URL connection input stream is compressed using gzip
Exception in thread "main" java.lang.NullPointerException
	at org.semanticweb.owlapi.util.OWLObjectPropertyManager.isLessThan(OWLObjectPropertyManager.java:455)
	at org.semanticweb.owlapi.profiles.OWL2DLProfile$OWL2DLProfileObjectVisitor.checkExtremes(OWL2DLProfile.java:600)
	at org.semanticweb.owlapi.profiles.OWL2DLProfile$OWL2DLProfileObjectVisitor.visit(OWL2DLProfile.java:585)
	at org.semanticweb.owlapi.model.OWLSubPropertyChainOfAxiom.accept(OWLSubPropertyChainOfAxiom.java:81)
	at org.semanticweb.owlapi.util.OWLObjectWalker.passToVisitor(OWLObjectWalker.java:112)
	at org.semanticweb.owlapi.util.StructureWalker.process(StructureWalker.java:145)
	at org.semanticweb.owlapi.util.StructureWalker.visit(StructureWalker.java:352)
	at org.semanticweb.owlapi.model.OWLSubPropertyChainOfAxiom.accept(OWLSubPropertyChainOfAxiom.java:81)
	at org.semanticweb.owlapi.util.StructureWalker.lambda$visit$0(StructureWalker.java:160)
	at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
	at java.util.stream.Streams$StreamBuilderImpl.forEachRemaining(Streams.java:419)
	at java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:742)
	at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:580)
	at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:270)
	at java.util.Iterator.forEachRemaining(Iterator.java:116)
	at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
	at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
	at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
	at org.semanticweb.owlapi.util.StructureWalker.visit(StructureWalker.java:160)
	at org.semanticweb.owlapi.model.OWLOntology.accept(OWLOntology.java:569)
	at uk.ac.manchester.cs.owl.owlapi.concurrent.ConcurrentOWLOntologyImpl.accept(ConcurrentOWLOntologyImpl.java:578)
	at org.semanticweb.owlapi.util.OWLObjectWalker.lambda$walkStructure$1(OWLObjectWalker.java:148)
	at java.util.ArrayList.forEach(ArrayList.java:1257)
	at org.semanticweb.owlapi.util.OWLObjectWalker.walkStructure(OWLObjectWalker.java:148)
	at org.semanticweb.owlapi.profiles.OWL2DLProfile.checkOntology(OWL2DLProfile.java:141)
	at org.semanticweb.owlapi.profiles.Profiles.checkOntology(Profiles.java:93)
	at no.s11.owlapi.ProfileChecker.checkAllProfiles(ProfileChecker.java:105)
	at no.s11.owlapi.ProfileChecker.checkOntology(ProfileChecker.java:87)
	at no.s11.owlapi.ProfileChecker.check(ProfileChecker.java:76)
	at no.s11.owlapi.ProfileChecker.main(ProfileChecker.java:177)

OWL2_DL: