/usr/share/doc/libjcsp-java/jcsp-demos/alting/ is in libjcsp-java-doc 1.1-rc4-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/libjcsp-java/jcsp-demos/alting/FairPlex.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/FairPlexTime.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/FairPlexTimeTest.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/Polling.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/PollingTest.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/PriPlex.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/PriPlexTime.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/PriPlexTimeTest.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/Regular.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/Regulate.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/RegulateTest.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/StressedAlt.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/StressedPacket.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/StressedReader.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/StressedWriter.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/Variate.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/ints/
/usr/share/doc/libjcsp-java/jcsp-demos/alting/ints/FairPlexInt.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/ints/FairPlexTimeInt.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/ints/FairPlexTimeIntTest.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/ints/PollingInt.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/ints/PollingIntTest.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/ints/PriPlexInt.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/ints/PriPlexTimeInt.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/ints/PriPlexTimeIntTest.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/ints/RegularInt.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/ints/RegulateInt.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/ints/RegulateIntTest.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/ints/StressedAltInt.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/ints/StressedReaderInt.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/ints/StressedWriterInt.java
/usr/share/doc/libjcsp-java/jcsp-demos/alting/ints/VariateInt.java
/usr/share/doc/libjcsp-java/jcsp-demos/altingBarriers/AltingBarrierGadget0.java
/usr/share/doc/libjcsp-java/jcsp-demos/altingBarriers/AltingBarrierGadget0Demo0.java
/usr/share/doc/libjcsp-java/jcsp-demos/altingBarriers/AltingBarrierGadget1.java
/usr/share/doc/libjcsp-java/jcsp-demos/altingBarriers/AltingBarrierGadget1Demo0.java
/usr/share/doc/libjcsp-java/jcsp-demos/altingBarriers/AltingBarrierGadget1Demo1.java
/usr/share/doc/libjcsp-java/jcsp-demos/altingBarriers/AltingBarrierGadget2.java
/usr/share/doc/libjcsp-java/jcsp-demos/altingBarriers/AltingBarrierGadget2Demo0.java
/usr/share/doc/libjcsp-java/jcsp-demos/altingBarriers/AltingBarrierGadget2Demo1.java
/usr/share/doc/libjcsp-java/jcsp-demos/altingBarriers/AltingBarrierGadget3.java
/usr/share/doc/libjcsp-java/jcsp-demos/altingBarriers/AltingBarrierGadget3Demo0.java
/usr/share/doc/libjcsp-java/jcsp-demos/altingBarriers/AltingBarrierGadget4.java
/usr/share/doc/libjcsp-java/jcsp-demos/altingBarriers/AltingBarrierGadget4Demo0.java
/usr/share/doc/libjcsp-java/jcsp-demos/altingBarriers/AltingBarrierGadget5.java
/usr/share/doc/libjcsp-java/jcsp-demos/altingBarriers/AltingBarrierGadget5Demo0.java
/usr/share/doc/libjcsp-java/jcsp-demos/altingBarriers/AltingBarrierGadget6.java
/usr/share/doc/libjcsp-java/jcsp-demos/altingBarriers/AltingBarrierGadget6Demo0.java
/usr/share/doc/libjcsp-java/jcsp-demos/altingBarriers/Parcel.java
/usr/share/doc/libjcsp-java/jcsp-demos/altingBarriers/Shared.java
/usr/share/doc/libjcsp-java/jcsp-demos/altingBarriers/Util.java