Problem using Inspections

When I use "Analyze > Inspect code", if I select whole project, or even a single (big, around 90k lines) module, the process that analyzes the code dies before showing any result.

IDEA is using 3.6GB, but in "idea/bin/idea64.vm" I assigned -Xmx7000m.

Total RAM: 16GB, used RAM: about 8GB

I am using the latest EAP build, but it happened as well with stable versions at least since 2017.1 (I do not remember it happened with 2016.1/.2)

In the log:

2017-09-21 18:57:31,080 [1170123] INFO - ex.GlobalInspectionContextImpl - Code inspection started
2017-09-21 18:57:31,970 [1171013] INFO - l.schema.ComplexTypeDescriptor - annotation (http://www.w3.org/2001/XMLSchema) is replaced by annotation (http://www.w3.org/2001/XMLSchema)
2017-09-21 18:57:31,988 [1171031] INFO - l.schema.ComplexTypeDescriptor - annotation (http://www.w3.org/2001/XMLSchema) is replaced by annotation (http://www.w3.org/2001/XMLSchema)
2017-09-21 18:57:31,992 [1171035] INFO - l.schema.ComplexTypeDescriptor - annotation (http://www.w3.org/2001/XMLSchema) is replaced by annotation (http://www.w3.org/2001/XMLSchema)
2017-09-21 18:57:31,992 [1171035] INFO - l.schema.ComplexTypeDescriptor - simpleType (http://www.w3.org/2001/XMLSchema) is replaced by simpleType (http://www.w3.org/2001/XMLSchema)
2017-09-21 18:57:31,992 [1171035] INFO - l.schema.ComplexTypeDescriptor - complexType (http://www.w3.org/2001/XMLSchema) is replaced by complexType (http://www.w3.org/2001/XMLSchema)
2017-09-21 18:57:31,993 [1171036] INFO - l.schema.ComplexTypeDescriptor - annotation (http://www.w3.org/2001/XMLSchema) is replaced by annotation (http://www.w3.org/2001/XMLSchema)
2017-09-21 18:58:16,703 [1215746] INFO - l.schema.ComplexTypeDescriptor - annotation (http://www.w3.org/2001/XMLSchema) is replaced by annotation (http://www.w3.org/2001/XMLSchema)
2017-09-21 18:58:21,305 [1220348] INFO - nspection.reference.RefManager - Total duration of processing project usages:49964

Any idea where to look for the error, and how to solve it?