./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 18:20:19,200 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 18:20:19,282 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-23 18:20:19,294 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 18:20:19,295 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 18:20:19,340 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 18:20:19,341 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 18:20:19,341 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 18:20:19,343 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 18:20:19,344 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 18:20:19,345 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 18:20:19,345 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 18:20:19,346 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 18:20:19,346 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 18:20:19,346 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 18:20:19,347 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 18:20:19,347 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 18:20:19,347 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 18:20:19,347 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 18:20:19,347 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 18:20:19,347 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-23 18:20:19,347 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-23 18:20:19,347 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-23 18:20:19,347 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 18:20:19,348 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 18:20:19,348 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 18:20:19,348 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 18:20:19,348 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 18:20:19,348 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 18:20:19,348 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 18:20:19,348 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:20:19,348 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:20:19,348 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:20:19,348 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:20:19,349 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 18:20:19,349 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:20:19,349 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:20:19,349 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:20:19,349 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:20:19,349 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 18:20:19,349 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 18:20:19,349 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 18:20:19,349 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 18:20:19,349 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 18:20:19,350 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 18:20:19,350 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 18:20:19,350 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 18:20:19,350 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 [2024-11-23 18:20:19,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 18:20:19,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 18:20:19,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 18:20:19,782 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 18:20:19,782 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 18:20:19,784 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2024-11-23 18:20:22,939 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/data/bdd627221/74871c70c0e24a80b4e277b079ae69e5/FLAG78afd6779 [2024-11-23 18:20:23,393 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 18:20:23,394 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2024-11-23 18:20:23,425 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/data/bdd627221/74871c70c0e24a80b4e277b079ae69e5/FLAG78afd6779 [2024-11-23 18:20:23,451 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/data/bdd627221/74871c70c0e24a80b4e277b079ae69e5 [2024-11-23 18:20:23,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 18:20:23,456 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 18:20:23,459 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 18:20:23,460 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 18:20:23,467 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 18:20:23,468 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:20:23" (1/1) ... [2024-11-23 18:20:23,469 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c0a7f97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:20:23, skipping insertion in model container [2024-11-23 18:20:23,472 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:20:23" (1/1) ... [2024-11-23 18:20:23,527 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 18:20:24,056 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-23 18:20:24,056 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-23 18:20:24,057 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-23 18:20:24,057 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-23 18:20:24,091 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:20:24,140 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2024-11-23 18:20:24,141 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3e1e6889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:20:24, skipping insertion in model container [2024-11-23 18:20:24,141 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 18:20:24,142 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-11-23 18:20:24,143 INFO L158 Benchmark]: Toolchain (without parser) took 687.45ms. Allocated memory is still 142.6MB. Free memory was 117.4MB in the beginning and 99.9MB in the end (delta: 17.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-23 18:20:24,144 INFO L158 Benchmark]: CDTParser took 0.72ms. Allocated memory is still 142.6MB. Free memory is still 80.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-23 18:20:24,144 INFO L158 Benchmark]: CACSL2BoogieTranslator took 682.75ms. Allocated memory is still 142.6MB. Free memory was 117.1MB in the beginning and 99.9MB in the end (delta: 17.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-23 18:20:24,146 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.72ms. Allocated memory is still 142.6MB. Free memory is still 80.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 682.75ms. Allocated memory is still 142.6MB. Free memory was 117.1MB in the beginning and 99.9MB in the end (delta: 17.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1051]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 18:20:26,773 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 18:20:26,912 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-23 18:20:26,922 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 18:20:26,927 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 18:20:26,973 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 18:20:26,975 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 18:20:26,975 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 18:20:26,976 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 18:20:26,976 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 18:20:26,977 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 18:20:26,977 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 18:20:26,978 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 18:20:26,978 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 18:20:26,978 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 18:20:26,978 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 18:20:26,979 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 18:20:26,979 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 18:20:26,979 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 18:20:26,979 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 18:20:26,980 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-23 18:20:26,980 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-23 18:20:26,980 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-23 18:20:26,980 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 18:20:26,980 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 18:20:26,980 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-23 18:20:26,980 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-23 18:20:26,981 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 18:20:26,981 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 18:20:26,981 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 18:20:26,981 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 18:20:26,982 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 18:20:26,982 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:20:26,982 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:20:26,982 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:20:26,982 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:20:26,983 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 18:20:26,983 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 18:20:26,983 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 18:20:26,983 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 18:20:26,983 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:20:26,983 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 18:20:26,983 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 18:20:26,983 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-23 18:20:26,983 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-23 18:20:26,983 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 18:20:26,983 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 18:20:26,983 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 18:20:26,983 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 18:20:26,984 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda5467f7679a243042daf02aae11f74f39b907c2525dfc042cb8ad8b69dcfc9 [2024-11-23 18:20:27,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 18:20:27,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 18:20:27,338 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 18:20:27,339 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 18:20:27,339 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 18:20:27,341 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2024-11-23 18:20:30,337 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/data/ec0a8dcde/5740bb2d796c4759b62aa9c7aaa5bf46/FLAGcac6aa62b [2024-11-23 18:20:30,720 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 18:20:30,721 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2024-11-23 18:20:30,751 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/data/ec0a8dcde/5740bb2d796c4759b62aa9c7aaa5bf46/FLAGcac6aa62b [2024-11-23 18:20:30,774 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/data/ec0a8dcde/5740bb2d796c4759b62aa9c7aaa5bf46 [2024-11-23 18:20:30,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 18:20:30,778 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 18:20:30,781 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 18:20:30,782 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 18:20:30,786 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 18:20:30,787 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:20:30" (1/1) ... [2024-11-23 18:20:30,788 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@439ce7d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:20:30, skipping insertion in model container [2024-11-23 18:20:30,789 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 06:20:30" (1/1) ... [2024-11-23 18:20:30,845 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 18:20:31,336 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-23 18:20:31,337 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-23 18:20:31,337 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-23 18:20:31,338 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-23 18:20:31,380 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:20:31,457 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-11-23 18:20:31,477 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 18:20:31,537 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-23 18:20:31,538 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-23 18:20:31,538 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-23 18:20:31,539 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-23 18:20:31,554 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:20:31,595 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 18:20:31,647 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-23 18:20:31,648 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-23 18:20:31,648 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-23 18:20:31,648 WARN L1675 CHandler]: Possible shadowing of function new [2024-11-23 18:20:31,662 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 18:20:31,776 INFO L204 MainTranslator]: Completed translation [2024-11-23 18:20:31,777 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:20:31 WrapperNode [2024-11-23 18:20:31,777 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 18:20:31,778 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 18:20:31,778 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 18:20:31,778 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 18:20:31,787 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:20:31" (1/1) ... [2024-11-23 18:20:31,814 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:20:31" (1/1) ... [2024-11-23 18:20:31,854 INFO L138 Inliner]: procedures = 284, calls = 126, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 292 [2024-11-23 18:20:31,855 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 18:20:31,856 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 18:20:31,856 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 18:20:31,856 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 18:20:31,866 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:20:31" (1/1) ... [2024-11-23 18:20:31,866 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:20:31" (1/1) ... [2024-11-23 18:20:31,872 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:20:31" (1/1) ... [2024-11-23 18:20:31,911 INFO L175 MemorySlicer]: Split 100 memory accesses to 4 slices as follows [2, 5, 91, 2]. 91 percent of accesses are in the largest equivalence class. The 77 initializations are split as follows [2, 5, 70, 0]. The 13 writes are split as follows [0, 0, 12, 1]. [2024-11-23 18:20:31,911 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:20:31" (1/1) ... [2024-11-23 18:20:31,911 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:20:31" (1/1) ... [2024-11-23 18:20:31,949 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:20:31" (1/1) ... [2024-11-23 18:20:31,950 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:20:31" (1/1) ... [2024-11-23 18:20:31,959 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:20:31" (1/1) ... [2024-11-23 18:20:31,962 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:20:31" (1/1) ... [2024-11-23 18:20:31,968 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:20:31" (1/1) ... [2024-11-23 18:20:31,977 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 18:20:31,979 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 18:20:31,980 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 18:20:31,980 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 18:20:31,981 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:20:31" (1/1) ... [2024-11-23 18:20:31,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 18:20:32,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:20:32,026 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 18:20:32,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 18:20:32,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-23 18:20:32,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-23 18:20:32,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2024-11-23 18:20:32,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2024-11-23 18:20:32,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-23 18:20:32,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-23 18:20:32,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-23 18:20:32,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-23 18:20:32,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-23 18:20:32,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-23 18:20:32,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-23 18:20:32,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-23 18:20:32,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2024-11-23 18:20:32,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2024-11-23 18:20:32,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-23 18:20:32,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-23 18:20:32,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-23 18:20:32,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-23 18:20:32,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-23 18:20:32,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-23 18:20:32,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-23 18:20:32,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2024-11-23 18:20:32,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2024-11-23 18:20:32,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2024-11-23 18:20:32,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2024-11-23 18:20:32,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2024-11-23 18:20:32,060 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-23 18:20:32,061 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-23 18:20:32,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 18:20:32,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 18:20:32,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-23 18:20:32,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-23 18:20:32,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-23 18:20:32,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-23 18:20:32,061 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-23 18:20:32,062 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-23 18:20:32,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 18:20:32,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 18:20:32,064 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 18:20:32,317 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 18:20:32,321 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 18:20:33,506 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 18:20:33,507 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 18:20:35,601 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 18:20:35,601 INFO L312 CfgBuilder]: Removed 11 assume(true) statements. [2024-11-23 18:20:35,601 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:20:35 BoogieIcfgContainer [2024-11-23 18:20:35,601 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 18:20:35,608 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 18:20:35,608 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 18:20:35,614 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 18:20:35,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 06:20:30" (1/3) ... [2024-11-23 18:20:35,615 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5724a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:20:35, skipping insertion in model container [2024-11-23 18:20:35,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 06:20:31" (2/3) ... [2024-11-23 18:20:35,616 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5724a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 06:20:35, skipping insertion in model container [2024-11-23 18:20:35,617 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 06:20:35" (3/3) ... [2024-11-23 18:20:35,619 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_92-evilcollapse_racing-deref.i [2024-11-23 18:20:35,639 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 18:20:35,641 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_92-evilcollapse_racing-deref.i that has 2 procedures, 115 locations, 1 initial locations, 11 loop locations, and 48 error locations. [2024-11-23 18:20:35,642 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 18:20:35,798 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-23 18:20:35,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 133 transitions, 273 flow [2024-11-23 18:20:35,952 INFO L124 PetriNetUnfolderBase]: 18/145 cut-off events. [2024-11-23 18:20:35,955 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-23 18:20:35,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 145 events. 18/145 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 536 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 82. Up to 4 conditions per place. [2024-11-23 18:20:35,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 133 transitions, 273 flow [2024-11-23 18:20:35,969 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 133 transitions, 273 flow [2024-11-23 18:20:35,985 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 18:20:36,000 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@25147073, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 18:20:36,000 INFO L334 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2024-11-23 18:20:36,019 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 18:20:36,019 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-23 18:20:36,019 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 18:20:36,019 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:20:36,020 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 18:20:36,020 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-23 18:20:36,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:20:36,027 INFO L85 PathProgramCache]: Analyzing trace with hash 839012, now seen corresponding path program 1 times [2024-11-23 18:20:36,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:20:36,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237528225] [2024-11-23 18:20:36,041 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:20:36,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:36,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:20:36,044 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:20:36,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 18:20:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:20:36,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 18:20:36,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:20:36,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:20:36,566 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:20:36,567 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:20:36,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237528225] [2024-11-23 18:20:36,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237528225] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:20:36,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:20:36,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:20:36,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950470413] [2024-11-23 18:20:36,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:20:36,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:20:36,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:20:36,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:20:36,622 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:20:36,957 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 133 [2024-11-23 18:20:36,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 133 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:36,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:20:36,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 133 [2024-11-23 18:20:36,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:20:37,598 INFO L124 PetriNetUnfolderBase]: 125/490 cut-off events. [2024-11-23 18:20:37,598 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2024-11-23 18:20:37,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769 conditions, 490 events. 125/490 cut-off events. For 5/6 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2693 event pairs, 64 based on Foata normal form. 52/431 useless extension candidates. Maximal degree in co-relation 675. Up to 177 conditions per place. [2024-11-23 18:20:37,605 INFO L140 encePairwiseOnDemand]: 112/133 looper letters, 66 selfloop transitions, 4 changer transitions 0/139 dead transitions. [2024-11-23 18:20:37,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 139 transitions, 425 flow [2024-11-23 18:20:37,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:20:37,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:20:37,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 375 transitions. [2024-11-23 18:20:37,623 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7048872180451128 [2024-11-23 18:20:37,625 INFO L175 Difference]: Start difference. First operand has 118 places, 133 transitions, 273 flow. Second operand 4 states and 375 transitions. [2024-11-23 18:20:37,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 139 transitions, 425 flow [2024-11-23 18:20:37,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 139 transitions, 425 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-23 18:20:37,637 INFO L231 Difference]: Finished difference. Result has 117 places, 116 transitions, 253 flow [2024-11-23 18:20:37,640 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=253, PETRI_PLACES=117, PETRI_TRANSITIONS=116} [2024-11-23 18:20:37,646 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2024-11-23 18:20:37,646 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 116 transitions, 253 flow [2024-11-23 18:20:37,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 4 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:37,646 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:20:37,646 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 18:20:37,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-23 18:20:37,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:37,847 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-23 18:20:37,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:20:37,848 INFO L85 PathProgramCache]: Analyzing trace with hash 838963, now seen corresponding path program 1 times [2024-11-23 18:20:37,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:20:37,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192874857] [2024-11-23 18:20:37,849 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:20:37,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:37,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:20:37,854 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:20:37,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 18:20:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:20:38,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-23 18:20:38,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:20:38,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:20:38,225 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:20:38,225 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:20:38,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192874857] [2024-11-23 18:20:38,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192874857] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:20:38,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:20:38,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:20:38,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142852891] [2024-11-23 18:20:38,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:20:38,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:20:38,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:20:38,229 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:20:38,230 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:20:38,230 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2024-11-23 18:20:38,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 116 transitions, 253 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:38,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:20:38,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2024-11-23 18:20:38,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:20:38,733 INFO L124 PetriNetUnfolderBase]: 127/547 cut-off events. [2024-11-23 18:20:38,733 INFO L125 PetriNetUnfolderBase]: For 25/26 co-relation queries the response was YES. [2024-11-23 18:20:38,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 885 conditions, 547 events. 127/547 cut-off events. For 25/26 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2985 event pairs, 105 based on Foata normal form. 1/419 useless extension candidates. Maximal degree in co-relation 743. Up to 269 conditions per place. [2024-11-23 18:20:38,741 INFO L140 encePairwiseOnDemand]: 130/133 looper letters, 50 selfloop transitions, 2 changer transitions 0/124 dead transitions. [2024-11-23 18:20:38,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 124 transitions, 379 flow [2024-11-23 18:20:38,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:20:38,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:20:38,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2024-11-23 18:20:38,751 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7042606516290727 [2024-11-23 18:20:38,751 INFO L175 Difference]: Start difference. First operand has 117 places, 116 transitions, 253 flow. Second operand 3 states and 281 transitions. [2024-11-23 18:20:38,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 124 transitions, 379 flow [2024-11-23 18:20:38,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 124 transitions, 367 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 18:20:38,759 INFO L231 Difference]: Finished difference. Result has 117 places, 117 transitions, 257 flow [2024-11-23 18:20:38,759 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=257, PETRI_PLACES=117, PETRI_TRANSITIONS=117} [2024-11-23 18:20:38,760 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2024-11-23 18:20:38,760 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 117 transitions, 257 flow [2024-11-23 18:20:38,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:38,760 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:20:38,761 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 18:20:38,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-23 18:20:38,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:38,961 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-23 18:20:38,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:20:38,962 INFO L85 PathProgramCache]: Analyzing trace with hash 839013, now seen corresponding path program 1 times [2024-11-23 18:20:38,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:20:38,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419431478] [2024-11-23 18:20:38,963 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:20:38,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:38,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:20:38,966 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:20:38,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 18:20:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:20:39,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 18:20:39,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:20:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:20:39,413 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:20:39,413 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:20:39,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419431478] [2024-11-23 18:20:39,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419431478] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:20:39,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:20:39,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:20:39,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321081552] [2024-11-23 18:20:39,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:20:39,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:20:39,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:20:39,415 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:20:39,415 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:20:39,815 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 133 [2024-11-23 18:20:39,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 117 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:39,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:20:39,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 133 [2024-11-23 18:20:39,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:20:40,348 INFO L124 PetriNetUnfolderBase]: 128/547 cut-off events. [2024-11-23 18:20:40,348 INFO L125 PetriNetUnfolderBase]: For 7/8 co-relation queries the response was YES. [2024-11-23 18:20:40,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 547 events. 128/547 cut-off events. For 7/8 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2988 event pairs, 105 based on Foata normal form. 2/426 useless extension candidates. Maximal degree in co-relation 816. Up to 282 conditions per place. [2024-11-23 18:20:40,355 INFO L140 encePairwiseOnDemand]: 126/133 looper letters, 48 selfloop transitions, 5 changer transitions 0/121 dead transitions. [2024-11-23 18:20:40,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 121 transitions, 376 flow [2024-11-23 18:20:40,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:20:40,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:20:40,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 342 transitions. [2024-11-23 18:20:40,360 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-11-23 18:20:40,360 INFO L175 Difference]: Start difference. First operand has 117 places, 117 transitions, 257 flow. Second operand 4 states and 342 transitions. [2024-11-23 18:20:40,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 121 transitions, 376 flow [2024-11-23 18:20:40,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 121 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:20:40,366 INFO L231 Difference]: Finished difference. Result has 121 places, 121 transitions, 296 flow [2024-11-23 18:20:40,367 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=296, PETRI_PLACES=121, PETRI_TRANSITIONS=121} [2024-11-23 18:20:40,368 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 3 predicate places. [2024-11-23 18:20:40,368 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 121 transitions, 296 flow [2024-11-23 18:20:40,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:40,369 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:20:40,369 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-23 18:20:40,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-23 18:20:40,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:40,574 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-23 18:20:40,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:20:40,575 INFO L85 PathProgramCache]: Analyzing trace with hash -773991819, now seen corresponding path program 1 times [2024-11-23 18:20:40,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:20:40,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265981795] [2024-11-23 18:20:40,576 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:20:40,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:40,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:20:40,579 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:20:40,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 18:20:40,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:20:40,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 18:20:40,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:20:40,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-23 18:20:41,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:20:41,006 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:20:41,006 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:20:41,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265981795] [2024-11-23 18:20:41,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265981795] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:20:41,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:20:41,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:20:41,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963989047] [2024-11-23 18:20:41,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:20:41,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:20:41,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:20:41,009 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:20:41,009 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:20:41,186 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 133 [2024-11-23 18:20:41,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 121 transitions, 296 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:41,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:20:41,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 133 [2024-11-23 18:20:41,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:20:41,610 INFO L124 PetriNetUnfolderBase]: 128/545 cut-off events. [2024-11-23 18:20:41,611 INFO L125 PetriNetUnfolderBase]: For 15/16 co-relation queries the response was YES. [2024-11-23 18:20:41,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 881 conditions, 545 events. 128/545 cut-off events. For 15/16 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2972 event pairs, 105 based on Foata normal form. 0/422 useless extension candidates. Maximal degree in co-relation 819. Up to 274 conditions per place. [2024-11-23 18:20:41,615 INFO L140 encePairwiseOnDemand]: 130/133 looper letters, 46 selfloop transitions, 3 changer transitions 0/120 dead transitions. [2024-11-23 18:20:41,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 120 transitions, 392 flow [2024-11-23 18:20:41,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:20:41,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:20:41,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2024-11-23 18:20:41,617 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6766917293233082 [2024-11-23 18:20:41,618 INFO L175 Difference]: Start difference. First operand has 121 places, 121 transitions, 296 flow. Second operand 3 states and 270 transitions. [2024-11-23 18:20:41,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 120 transitions, 392 flow [2024-11-23 18:20:41,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 120 transitions, 389 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:20:41,622 INFO L231 Difference]: Finished difference. Result has 121 places, 120 transitions, 297 flow [2024-11-23 18:20:41,623 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=297, PETRI_PLACES=121, PETRI_TRANSITIONS=120} [2024-11-23 18:20:41,623 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 3 predicate places. [2024-11-23 18:20:41,624 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 120 transitions, 297 flow [2024-11-23 18:20:41,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:41,624 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:20:41,624 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-23 18:20:41,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-23 18:20:41,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:41,829 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-23 18:20:41,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:20:41,829 INFO L85 PathProgramCache]: Analyzing trace with hash -773991818, now seen corresponding path program 1 times [2024-11-23 18:20:41,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:20:41,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844612663] [2024-11-23 18:20:41,830 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:20:41,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:41,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:20:41,835 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:20:41,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 18:20:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:20:42,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 18:20:42,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:20:42,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-23 18:20:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:20:42,218 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:20:42,218 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:20:42,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844612663] [2024-11-23 18:20:42,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844612663] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:20:42,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:20:42,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:20:42,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274175572] [2024-11-23 18:20:42,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:20:42,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:20:42,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:20:42,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:20:42,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:20:42,484 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 133 [2024-11-23 18:20:42,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 120 transitions, 297 flow. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:42,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:20:42,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 133 [2024-11-23 18:20:42,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:20:42,920 INFO L124 PetriNetUnfolderBase]: 128/543 cut-off events. [2024-11-23 18:20:42,920 INFO L125 PetriNetUnfolderBase]: For 19/20 co-relation queries the response was YES. [2024-11-23 18:20:42,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 543 events. 128/543 cut-off events. For 19/20 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2962 event pairs, 105 based on Foata normal form. 0/420 useless extension candidates. Maximal degree in co-relation 819. Up to 274 conditions per place. [2024-11-23 18:20:42,925 INFO L140 encePairwiseOnDemand]: 130/133 looper letters, 46 selfloop transitions, 3 changer transitions 0/119 dead transitions. [2024-11-23 18:20:42,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 119 transitions, 393 flow [2024-11-23 18:20:42,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:20:42,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:20:42,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2024-11-23 18:20:42,927 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6766917293233082 [2024-11-23 18:20:42,928 INFO L175 Difference]: Start difference. First operand has 121 places, 120 transitions, 297 flow. Second operand 3 states and 270 transitions. [2024-11-23 18:20:42,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 119 transitions, 393 flow [2024-11-23 18:20:42,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 119 transitions, 387 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:20:42,932 INFO L231 Difference]: Finished difference. Result has 120 places, 119 transitions, 295 flow [2024-11-23 18:20:42,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=295, PETRI_PLACES=120, PETRI_TRANSITIONS=119} [2024-11-23 18:20:42,933 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 2 predicate places. [2024-11-23 18:20:42,933 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 119 transitions, 295 flow [2024-11-23 18:20:42,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:42,934 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:20:42,934 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:20:42,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-23 18:20:43,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:43,138 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-23 18:20:43,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:20:43,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1776058254, now seen corresponding path program 1 times [2024-11-23 18:20:43,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:20:43,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62940831] [2024-11-23 18:20:43,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:20:43,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:43,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:20:43,141 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:20:43,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 18:20:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:20:43,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 18:20:43,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:20:43,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-23 18:20:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:20:43,538 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:20:43,538 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:20:43,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62940831] [2024-11-23 18:20:43,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62940831] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:20:43,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:20:43,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:20:43,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629486114] [2024-11-23 18:20:43,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:20:43,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:20:43,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:20:43,539 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:20:43,539 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:20:43,909 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 133 [2024-11-23 18:20:43,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 119 transitions, 295 flow. Second operand has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:43,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:20:43,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 133 [2024-11-23 18:20:43,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:20:44,351 INFO L124 PetriNetUnfolderBase]: 128/539 cut-off events. [2024-11-23 18:20:44,351 INFO L125 PetriNetUnfolderBase]: For 20/21 co-relation queries the response was YES. [2024-11-23 18:20:44,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 539 events. 128/539 cut-off events. For 20/21 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2935 event pairs, 105 based on Foata normal form. 4/424 useless extension candidates. Maximal degree in co-relation 817. Up to 276 conditions per place. [2024-11-23 18:20:44,355 INFO L140 encePairwiseOnDemand]: 128/133 looper letters, 47 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2024-11-23 18:20:44,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 117 transitions, 393 flow [2024-11-23 18:20:44,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:20:44,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:20:44,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 332 transitions. [2024-11-23 18:20:44,357 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6240601503759399 [2024-11-23 18:20:44,357 INFO L175 Difference]: Start difference. First operand has 120 places, 119 transitions, 295 flow. Second operand 4 states and 332 transitions. [2024-11-23 18:20:44,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 117 transitions, 393 flow [2024-11-23 18:20:44,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 117 transitions, 387 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:20:44,361 INFO L231 Difference]: Finished difference. Result has 119 places, 117 transitions, 293 flow [2024-11-23 18:20:44,361 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=293, PETRI_PLACES=119, PETRI_TRANSITIONS=117} [2024-11-23 18:20:44,362 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2024-11-23 18:20:44,362 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 117 transitions, 293 flow [2024-11-23 18:20:44,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:44,362 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:20:44,362 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:20:44,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-23 18:20:44,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:44,563 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-23 18:20:44,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:20:44,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1776058253, now seen corresponding path program 1 times [2024-11-23 18:20:44,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:20:44,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630211961] [2024-11-23 18:20:44,564 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:20:44,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:44,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:20:44,566 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:20:44,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 18:20:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:20:44,893 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 18:20:44,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:20:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:20:44,908 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:20:44,909 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:20:44,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630211961] [2024-11-23 18:20:44,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630211961] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:20:44,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:20:44,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 18:20:44,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58357795] [2024-11-23 18:20:44,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:20:44,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:20:44,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:20:44,910 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:20:44,910 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:20:45,061 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 133 [2024-11-23 18:20:45,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 117 transitions, 293 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:45,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:20:45,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 133 [2024-11-23 18:20:45,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:20:45,418 INFO L124 PetriNetUnfolderBase]: 128/535 cut-off events. [2024-11-23 18:20:45,418 INFO L125 PetriNetUnfolderBase]: For 12/13 co-relation queries the response was YES. [2024-11-23 18:20:45,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 535 events. 128/535 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2928 event pairs, 105 based on Foata normal form. 2/420 useless extension candidates. Maximal degree in co-relation 818. Up to 277 conditions per place. [2024-11-23 18:20:45,421 INFO L140 encePairwiseOnDemand]: 127/133 looper letters, 46 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2024-11-23 18:20:45,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 115 transitions, 391 flow [2024-11-23 18:20:45,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:20:45,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:20:45,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2024-11-23 18:20:45,424 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6466165413533834 [2024-11-23 18:20:45,424 INFO L175 Difference]: Start difference. First operand has 119 places, 117 transitions, 293 flow. Second operand 3 states and 258 transitions. [2024-11-23 18:20:45,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 115 transitions, 391 flow [2024-11-23 18:20:45,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 115 transitions, 383 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 18:20:45,427 INFO L231 Difference]: Finished difference. Result has 116 places, 115 transitions, 291 flow [2024-11-23 18:20:45,427 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=291, PETRI_PLACES=116, PETRI_TRANSITIONS=115} [2024-11-23 18:20:45,428 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, -2 predicate places. [2024-11-23 18:20:45,428 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 115 transitions, 291 flow [2024-11-23 18:20:45,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:45,429 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:20:45,429 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:20:45,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-23 18:20:45,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:45,634 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-23 18:20:45,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:20:45,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1776062450, now seen corresponding path program 1 times [2024-11-23 18:20:45,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:20:45,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552010388] [2024-11-23 18:20:45,635 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:20:45,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:45,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:20:45,638 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:20:45,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 18:20:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:20:45,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-23 18:20:45,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:20:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:20:45,960 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:20:45,960 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:20:45,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552010388] [2024-11-23 18:20:45,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552010388] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:20:45,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:20:45,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:20:45,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107859988] [2024-11-23 18:20:45,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:20:45,961 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 18:20:45,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:20:45,961 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 18:20:45,961 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 18:20:45,961 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2024-11-23 18:20:45,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 115 transitions, 291 flow. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:45,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:20:45,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2024-11-23 18:20:45,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:20:46,272 INFO L124 PetriNetUnfolderBase]: 127/571 cut-off events. [2024-11-23 18:20:46,272 INFO L125 PetriNetUnfolderBase]: For 19/20 co-relation queries the response was YES. [2024-11-23 18:20:46,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 924 conditions, 571 events. 127/571 cut-off events. For 19/20 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3115 event pairs, 105 based on Foata normal form. 2/440 useless extension candidates. Maximal degree in co-relation 835. Up to 277 conditions per place. [2024-11-23 18:20:46,275 INFO L140 encePairwiseOnDemand]: 130/133 looper letters, 50 selfloop transitions, 3 changer transitions 0/119 dead transitions. [2024-11-23 18:20:46,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 119 transitions, 407 flow [2024-11-23 18:20:46,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 18:20:46,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 18:20:46,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2024-11-23 18:20:46,278 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6967418546365914 [2024-11-23 18:20:46,278 INFO L175 Difference]: Start difference. First operand has 116 places, 115 transitions, 291 flow. Second operand 3 states and 278 transitions. [2024-11-23 18:20:46,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 119 transitions, 407 flow [2024-11-23 18:20:46,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 119 transitions, 393 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:20:46,281 INFO L231 Difference]: Finished difference. Result has 117 places, 115 transitions, 290 flow [2024-11-23 18:20:46,281 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=117, PETRI_TRANSITIONS=115} [2024-11-23 18:20:46,282 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2024-11-23 18:20:46,282 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 115 transitions, 290 flow [2024-11-23 18:20:46,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:46,283 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:20:46,283 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:20:46,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-23 18:20:46,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:46,483 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-23 18:20:46,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:20:46,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1689992218, now seen corresponding path program 1 times [2024-11-23 18:20:46,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:20:46,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308500758] [2024-11-23 18:20:46,484 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:20:46,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:46,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:20:46,486 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:20:46,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 18:20:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:20:46,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 18:20:46,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:20:46,921 INFO L349 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2024-11-23 18:20:46,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2024-11-23 18:20:47,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:20:47,027 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:20:47,028 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:20:47,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308500758] [2024-11-23 18:20:47,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308500758] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:20:47,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:20:47,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 18:20:47,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932621090] [2024-11-23 18:20:47,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:20:47,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 18:20:47,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:20:47,029 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 18:20:47,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 18:20:47,563 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 133 [2024-11-23 18:20:47,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 115 transitions, 290 flow. Second operand has 6 states, 6 states have (on average 70.5) internal successors, (423), 6 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:47,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:20:47,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 133 [2024-11-23 18:20:47,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:20:48,028 INFO L124 PetriNetUnfolderBase]: 126/537 cut-off events. [2024-11-23 18:20:48,028 INFO L125 PetriNetUnfolderBase]: For 27/28 co-relation queries the response was YES. [2024-11-23 18:20:48,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 898 conditions, 537 events. 126/537 cut-off events. For 27/28 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2920 event pairs, 64 based on Foata normal form. 4/422 useless extension candidates. Maximal degree in co-relation 810. Up to 192 conditions per place. [2024-11-23 18:20:48,031 INFO L140 encePairwiseOnDemand]: 127/133 looper letters, 70 selfloop transitions, 5 changer transitions 0/136 dead transitions. [2024-11-23 18:20:48,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 136 transitions, 482 flow [2024-11-23 18:20:48,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:20:48,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:20:48,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 348 transitions. [2024-11-23 18:20:48,033 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6541353383458647 [2024-11-23 18:20:48,034 INFO L175 Difference]: Start difference. First operand has 117 places, 115 transitions, 290 flow. Second operand 4 states and 348 transitions. [2024-11-23 18:20:48,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 136 transitions, 482 flow [2024-11-23 18:20:48,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 136 transitions, 479 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 18:20:48,037 INFO L231 Difference]: Finished difference. Result has 117 places, 113 transitions, 293 flow [2024-11-23 18:20:48,037 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=293, PETRI_PLACES=117, PETRI_TRANSITIONS=113} [2024-11-23 18:20:48,039 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2024-11-23 18:20:48,040 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 113 transitions, 293 flow [2024-11-23 18:20:48,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.5) internal successors, (423), 6 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:48,041 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:20:48,041 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:20:48,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-23 18:20:48,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:48,242 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-23 18:20:48,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:20:48,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1689992219, now seen corresponding path program 1 times [2024-11-23 18:20:48,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:20:48,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1866485156] [2024-11-23 18:20:48,243 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:20:48,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:48,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:20:48,247 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:20:48,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-23 18:20:48,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:20:48,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-23 18:20:48,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:20:48,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 18:20:48,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-23 18:20:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:20:48,792 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:20:48,793 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:20:48,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866485156] [2024-11-23 18:20:48,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866485156] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:20:48,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:20:48,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:20:48,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594040419] [2024-11-23 18:20:48,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:20:48,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:20:48,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:20:48,794 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:20:48,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:20:49,297 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 133 [2024-11-23 18:20:49,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 113 transitions, 293 flow. Second operand has 5 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:49,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:20:49,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 133 [2024-11-23 18:20:49,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:20:49,875 INFO L124 PetriNetUnfolderBase]: 128/561 cut-off events. [2024-11-23 18:20:49,875 INFO L125 PetriNetUnfolderBase]: For 53/54 co-relation queries the response was YES. [2024-11-23 18:20:49,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 950 conditions, 561 events. 128/561 cut-off events. For 53/54 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3044 event pairs, 106 based on Foata normal form. 2/436 useless extension candidates. Maximal degree in co-relation 857. Up to 281 conditions per place. [2024-11-23 18:20:49,878 INFO L140 encePairwiseOnDemand]: 127/133 looper letters, 53 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2024-11-23 18:20:49,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 119 transitions, 433 flow [2024-11-23 18:20:49,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:20:49,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:20:49,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 341 transitions. [2024-11-23 18:20:49,881 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6409774436090225 [2024-11-23 18:20:49,881 INFO L175 Difference]: Start difference. First operand has 117 places, 113 transitions, 293 flow. Second operand 4 states and 341 transitions. [2024-11-23 18:20:49,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 119 transitions, 433 flow [2024-11-23 18:20:49,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 119 transitions, 417 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 18:20:49,886 INFO L231 Difference]: Finished difference. Result has 119 places, 116 transitions, 321 flow [2024-11-23 18:20:49,887 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=321, PETRI_PLACES=119, PETRI_TRANSITIONS=116} [2024-11-23 18:20:49,888 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2024-11-23 18:20:49,889 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 116 transitions, 321 flow [2024-11-23 18:20:49,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 72.4) internal successors, (362), 5 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:49,890 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:20:49,890 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:20:49,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-23 18:20:50,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:50,091 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-23 18:20:50,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:20:50,091 INFO L85 PathProgramCache]: Analyzing trace with hash 850152137, now seen corresponding path program 1 times [2024-11-23 18:20:50,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:20:50,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241498135] [2024-11-23 18:20:50,092 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:20:50,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:50,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:20:50,126 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:20:50,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-23 18:20:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:20:50,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-23 18:20:50,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:20:50,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-23 18:20:50,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-23 18:20:50,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-23 18:20:50,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-23 18:20:50,857 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 18:20:50,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-23 18:20:50,901 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-23 18:20:50,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-23 18:20:50,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-11-23 18:20:50,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-23 18:20:51,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-11-23 18:20:51,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-23 18:20:51,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-11-23 18:20:51,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-23 18:20:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:20:51,256 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:20:51,256 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:20:51,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241498135] [2024-11-23 18:20:51,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241498135] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:20:51,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:20:51,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-23 18:20:51,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402163040] [2024-11-23 18:20:51,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:20:51,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-23 18:20:51,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:20:51,257 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-23 18:20:51,257 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-23 18:20:54,151 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 133 [2024-11-23 18:20:54,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 116 transitions, 321 flow. Second operand has 10 states, 10 states have (on average 57.0) internal successors, (570), 10 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:54,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:20:54,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 133 [2024-11-23 18:20:54,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:20:55,351 INFO L124 PetriNetUnfolderBase]: 128/560 cut-off events. [2024-11-23 18:20:55,351 INFO L125 PetriNetUnfolderBase]: For 26/27 co-relation queries the response was YES. [2024-11-23 18:20:55,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 961 conditions, 560 events. 128/560 cut-off events. For 26/27 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3034 event pairs, 106 based on Foata normal form. 0/448 useless extension candidates. Maximal degree in co-relation 867. Up to 294 conditions per place. [2024-11-23 18:20:55,354 INFO L140 encePairwiseOnDemand]: 121/133 looper letters, 68 selfloop transitions, 11 changer transitions 0/132 dead transitions. [2024-11-23 18:20:55,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 132 transitions, 517 flow [2024-11-23 18:20:55,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-23 18:20:55,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-23 18:20:55,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 695 transitions. [2024-11-23 18:20:55,358 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4750512645249487 [2024-11-23 18:20:55,358 INFO L175 Difference]: Start difference. First operand has 119 places, 116 transitions, 321 flow. Second operand 11 states and 695 transitions. [2024-11-23 18:20:55,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 132 transitions, 517 flow [2024-11-23 18:20:55,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 132 transitions, 513 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:20:55,361 INFO L231 Difference]: Finished difference. Result has 132 places, 121 transitions, 375 flow [2024-11-23 18:20:55,362 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=375, PETRI_PLACES=132, PETRI_TRANSITIONS=121} [2024-11-23 18:20:55,362 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 14 predicate places. [2024-11-23 18:20:55,363 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 121 transitions, 375 flow [2024-11-23 18:20:55,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 57.0) internal successors, (570), 10 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:55,363 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:20:55,363 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:20:55,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-23 18:20:55,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:55,564 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-23 18:20:55,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:20:55,565 INFO L85 PathProgramCache]: Analyzing trace with hash 850152136, now seen corresponding path program 1 times [2024-11-23 18:20:55,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:20:55,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544672564] [2024-11-23 18:20:55,565 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:20:55,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:55,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:20:55,569 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:20:55,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-23 18:20:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:20:55,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-23 18:20:55,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:20:56,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-23 18:20:56,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-23 18:20:56,130 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-23 18:20:56,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-23 18:20:56,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-23 18:20:56,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-23 18:20:56,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-23 18:20:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:20:56,373 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:20:56,373 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:20:56,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544672564] [2024-11-23 18:20:56,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544672564] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:20:56,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:20:56,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-23 18:20:56,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137362002] [2024-11-23 18:20:56,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:20:56,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-23 18:20:56,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:20:56,375 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-23 18:20:56,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-23 18:20:58,198 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 133 [2024-11-23 18:20:58,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 121 transitions, 375 flow. Second operand has 10 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:58,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:20:58,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 133 [2024-11-23 18:20:58,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:20:59,394 INFO L124 PetriNetUnfolderBase]: 128/559 cut-off events. [2024-11-23 18:20:59,394 INFO L125 PetriNetUnfolderBase]: For 36/37 co-relation queries the response was YES. [2024-11-23 18:20:59,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 989 conditions, 559 events. 128/559 cut-off events. For 36/37 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3016 event pairs, 106 based on Foata normal form. 1/451 useless extension candidates. Maximal degree in co-relation 908. Up to 290 conditions per place. [2024-11-23 18:20:59,398 INFO L140 encePairwiseOnDemand]: 121/133 looper letters, 66 selfloop transitions, 11 changer transitions 0/132 dead transitions. [2024-11-23 18:20:59,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 132 transitions, 559 flow [2024-11-23 18:20:59,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-23 18:20:59,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-23 18:20:59,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 715 transitions. [2024-11-23 18:20:59,402 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48872180451127817 [2024-11-23 18:20:59,402 INFO L175 Difference]: Start difference. First operand has 132 places, 121 transitions, 375 flow. Second operand 11 states and 715 transitions. [2024-11-23 18:20:59,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 132 transitions, 559 flow [2024-11-23 18:20:59,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 132 transitions, 555 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 18:20:59,407 INFO L231 Difference]: Finished difference. Result has 141 places, 121 transitions, 397 flow [2024-11-23 18:20:59,408 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=397, PETRI_PLACES=141, PETRI_TRANSITIONS=121} [2024-11-23 18:20:59,410 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 23 predicate places. [2024-11-23 18:20:59,411 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 121 transitions, 397 flow [2024-11-23 18:20:59,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:20:59,412 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:20:59,412 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:20:59,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-23 18:20:59,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:59,613 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-23 18:20:59,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:20:59,613 INFO L85 PathProgramCache]: Analyzing trace with hash 584913268, now seen corresponding path program 1 times [2024-11-23 18:20:59,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:20:59,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918828689] [2024-11-23 18:20:59,614 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:20:59,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:20:59,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:20:59,616 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:20:59,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-23 18:20:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:20:59,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 18:20:59,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:20:59,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-23 18:21:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:21:00,020 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:21:00,021 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:21:00,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918828689] [2024-11-23 18:21:00,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918828689] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:21:00,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:21:00,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 18:21:00,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664521736] [2024-11-23 18:21:00,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:21:00,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 18:21:00,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:21:00,022 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 18:21:00,022 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 18:21:00,210 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 133 [2024-11-23 18:21:00,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 121 transitions, 397 flow. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:00,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:21:00,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 133 [2024-11-23 18:21:00,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:21:00,579 INFO L124 PetriNetUnfolderBase]: 127/549 cut-off events. [2024-11-23 18:21:00,579 INFO L125 PetriNetUnfolderBase]: For 69/70 co-relation queries the response was YES. [2024-11-23 18:21:00,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 549 events. 127/549 cut-off events. For 69/70 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2953 event pairs, 105 based on Foata normal form. 8/445 useless extension candidates. Maximal degree in co-relation 892. Up to 271 conditions per place. [2024-11-23 18:21:00,583 INFO L140 encePairwiseOnDemand]: 128/133 looper letters, 46 selfloop transitions, 9 changer transitions 0/119 dead transitions. [2024-11-23 18:21:00,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 119 transitions, 503 flow [2024-11-23 18:21:00,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 18:21:00,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 18:21:00,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 338 transitions. [2024-11-23 18:21:00,585 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6353383458646616 [2024-11-23 18:21:00,585 INFO L175 Difference]: Start difference. First operand has 141 places, 121 transitions, 397 flow. Second operand 4 states and 338 transitions. [2024-11-23 18:21:00,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 119 transitions, 503 flow [2024-11-23 18:21:00,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 119 transitions, 481 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-11-23 18:21:00,589 INFO L231 Difference]: Finished difference. Result has 132 places, 119 transitions, 389 flow [2024-11-23 18:21:00,589 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=389, PETRI_PLACES=132, PETRI_TRANSITIONS=119} [2024-11-23 18:21:00,590 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 14 predicate places. [2024-11-23 18:21:00,590 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 119 transitions, 389 flow [2024-11-23 18:21:00,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:00,590 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:21:00,590 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:21:00,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-23 18:21:00,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:00,791 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-23 18:21:00,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:21:00,792 INFO L85 PathProgramCache]: Analyzing trace with hash 584913267, now seen corresponding path program 1 times [2024-11-23 18:21:00,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:21:00,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952436663] [2024-11-23 18:21:00,792 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:21:00,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:00,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:21:00,794 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:21:00,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-23 18:21:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:21:01,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 18:21:01,073 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:21:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:21:01,101 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 18:21:01,101 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:21:01,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952436663] [2024-11-23 18:21:01,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952436663] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 18:21:01,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 18:21:01,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 18:21:01,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886250689] [2024-11-23 18:21:01,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 18:21:01,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 18:21:01,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:21:01,102 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 18:21:01,102 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 18:21:01,383 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 133 [2024-11-23 18:21:01,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 119 transitions, 389 flow. Second operand has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:01,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:21:01,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 133 [2024-11-23 18:21:01,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:21:01,896 INFO L124 PetriNetUnfolderBase]: 127/541 cut-off events. [2024-11-23 18:21:01,896 INFO L125 PetriNetUnfolderBase]: For 55/56 co-relation queries the response was YES. [2024-11-23 18:21:01,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 973 conditions, 541 events. 127/541 cut-off events. For 55/56 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2911 event pairs, 105 based on Foata normal form. 0/437 useless extension candidates. Maximal degree in co-relation 904. Up to 273 conditions per place. [2024-11-23 18:21:01,900 INFO L140 encePairwiseOnDemand]: 127/133 looper letters, 49 selfloop transitions, 11 changer transitions 0/117 dead transitions. [2024-11-23 18:21:01,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 117 transitions, 505 flow [2024-11-23 18:21:01,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 18:21:01,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 18:21:01,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 395 transitions. [2024-11-23 18:21:01,902 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5939849624060151 [2024-11-23 18:21:01,902 INFO L175 Difference]: Start difference. First operand has 132 places, 119 transitions, 389 flow. Second operand 5 states and 395 transitions. [2024-11-23 18:21:01,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 117 transitions, 505 flow [2024-11-23 18:21:01,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 117 transitions, 487 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 18:21:01,906 INFO L231 Difference]: Finished difference. Result has 131 places, 117 transitions, 389 flow [2024-11-23 18:21:01,906 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=389, PETRI_PLACES=131, PETRI_TRANSITIONS=117} [2024-11-23 18:21:01,906 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 13 predicate places. [2024-11-23 18:21:01,907 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 117 transitions, 389 flow [2024-11-23 18:21:01,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:01,907 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:21:01,907 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:21:01,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-23 18:21:02,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:02,108 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-23 18:21:02,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:21:02,108 INFO L85 PathProgramCache]: Analyzing trace with hash 368126698, now seen corresponding path program 1 times [2024-11-23 18:21:02,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:21:02,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166698824] [2024-11-23 18:21:02,109 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:21:02,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:02,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:21:02,110 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:21:02,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-23 18:21:02,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:21:02,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 18:21:02,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:21:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:21:02,465 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:21:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:21:02,512 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:21:02,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166698824] [2024-11-23 18:21:02,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166698824] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:21:02,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:21:02,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-11-23 18:21:02,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935995131] [2024-11-23 18:21:02,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:21:02,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 18:21:02,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:21:02,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 18:21:02,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-23 18:21:02,513 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2024-11-23 18:21:02,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 117 transitions, 389 flow. Second operand has 6 states, 6 states have (on average 78.83333333333333) internal successors, (473), 6 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:02,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:21:02,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2024-11-23 18:21:02,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:21:03,105 INFO L124 PetriNetUnfolderBase]: 127/591 cut-off events. [2024-11-23 18:21:03,106 INFO L125 PetriNetUnfolderBase]: For 150/151 co-relation queries the response was YES. [2024-11-23 18:21:03,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1101 conditions, 591 events. 127/591 cut-off events. For 150/151 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3044 event pairs, 105 based on Foata normal form. 6/489 useless extension candidates. Maximal degree in co-relation 1025. Up to 267 conditions per place. [2024-11-23 18:21:03,111 INFO L140 encePairwiseOnDemand]: 129/133 looper letters, 63 selfloop transitions, 11 changer transitions 0/136 dead transitions. [2024-11-23 18:21:03,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 136 transitions, 665 flow [2024-11-23 18:21:03,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 18:21:03,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 18:21:03,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 519 transitions. [2024-11-23 18:21:03,114 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.650375939849624 [2024-11-23 18:21:03,114 INFO L175 Difference]: Start difference. First operand has 131 places, 117 transitions, 389 flow. Second operand 6 states and 519 transitions. [2024-11-23 18:21:03,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 136 transitions, 665 flow [2024-11-23 18:21:03,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 136 transitions, 611 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 18:21:03,127 INFO L231 Difference]: Finished difference. Result has 136 places, 122 transitions, 453 flow [2024-11-23 18:21:03,128 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=453, PETRI_PLACES=136, PETRI_TRANSITIONS=122} [2024-11-23 18:21:03,129 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 18 predicate places. [2024-11-23 18:21:03,129 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 122 transitions, 453 flow [2024-11-23 18:21:03,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.83333333333333) internal successors, (473), 6 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:03,130 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:21:03,130 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:21:03,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-23 18:21:03,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:03,331 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-23 18:21:03,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:21:03,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1686777041, now seen corresponding path program 1 times [2024-11-23 18:21:03,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:21:03,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901491281] [2024-11-23 18:21:03,332 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:21:03,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:03,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:21:03,333 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:21:03,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-23 18:21:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:21:03,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-23 18:21:03,752 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:21:03,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-23 18:21:04,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-23 18:21:04,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-23 18:21:04,166 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2024-11-23 18:21:04,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2024-11-23 18:21:04,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2024-11-23 18:21:04,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-23 18:21:04,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2024-11-23 18:21:04,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-23 18:21:04,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2024-11-23 18:21:04,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 19 [2024-11-23 18:21:04,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-23 18:21:04,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-23 18:21:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:21:04,515 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:21:04,744 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_575 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_575) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_574 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_575 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_575) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_574) |c_~#c~0.base|) .cse1)))))) is different from false [2024-11-23 18:21:04,825 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_575 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_575) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_574 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_575 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_575) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_574) |c_~#c~0.base|) .cse1)))))) is different from false [2024-11-23 18:21:05,221 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:21:05,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 49 [2024-11-23 18:21:05,236 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:21:05,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 41 [2024-11-23 18:21:05,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:21:05,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 77 [2024-11-23 18:21:05,336 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:21:05,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 113 [2024-11-23 18:21:05,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2024-11-23 18:21:05,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2024-11-23 18:21:06,304 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:21:06,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 38 [2024-11-23 18:21:06,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:21:06,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 55 [2024-11-23 18:21:06,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-23 18:21:11,278 INFO L349 Elim1Store]: treesize reduction 10, result has 90.1 percent of original size [2024-11-23 18:21:11,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 156 [2024-11-23 18:21:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-11-23 18:21:14,667 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:21:14,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901491281] [2024-11-23 18:21:14,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901491281] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:21:14,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:21:14,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2024-11-23 18:21:14,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645458208] [2024-11-23 18:21:14,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:21:14,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-23 18:21:14,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:21:14,670 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-23 18:21:14,671 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=326, Unknown=5, NotChecked=74, Total=462 [2024-11-23 18:21:16,940 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 133 [2024-11-23 18:21:16,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 122 transitions, 453 flow. Second operand has 22 states, 22 states have (on average 21.545454545454547) internal successors, (474), 22 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:16,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:21:16,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 133 [2024-11-23 18:21:16,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:21:24,427 INFO L124 PetriNetUnfolderBase]: 465/1265 cut-off events. [2024-11-23 18:21:24,427 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-11-23 18:21:24,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2525 conditions, 1265 events. 465/1265 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7524 event pairs, 422 based on Foata normal form. 0/838 useless extension candidates. Maximal degree in co-relation 2437. Up to 955 conditions per place. [2024-11-23 18:21:24,434 INFO L140 encePairwiseOnDemand]: 123/133 looper letters, 85 selfloop transitions, 28 changer transitions 0/133 dead transitions. [2024-11-23 18:21:24,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 133 transitions, 719 flow [2024-11-23 18:21:24,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-23 18:21:24,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-23 18:21:24,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 377 transitions. [2024-11-23 18:21:24,437 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.20247046186895812 [2024-11-23 18:21:24,438 INFO L175 Difference]: Start difference. First operand has 136 places, 122 transitions, 453 flow. Second operand 14 states and 377 transitions. [2024-11-23 18:21:24,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 133 transitions, 719 flow [2024-11-23 18:21:24,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 133 transitions, 703 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-23 18:21:24,443 INFO L231 Difference]: Finished difference. Result has 151 places, 129 transitions, 535 flow [2024-11-23 18:21:24,443 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=535, PETRI_PLACES=151, PETRI_TRANSITIONS=129} [2024-11-23 18:21:24,443 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 33 predicate places. [2024-11-23 18:21:24,444 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 129 transitions, 535 flow [2024-11-23 18:21:24,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 21.545454545454547) internal successors, (474), 22 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:24,444 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:21:24,444 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:21:24,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-23 18:21:24,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:24,645 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-23 18:21:24,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:21:24,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1686777040, now seen corresponding path program 1 times [2024-11-23 18:21:24,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:21:24,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321582124] [2024-11-23 18:21:24,646 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:21:24,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:24,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:21:24,648 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:21:24,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-23 18:21:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:21:25,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-23 18:21:25,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:21:25,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-23 18:21:25,502 INFO L349 Elim1Store]: treesize reduction 90, result has 30.2 percent of original size [2024-11-23 18:21:25,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 52 [2024-11-23 18:21:25,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2024-11-23 18:21:25,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2024-11-23 18:21:25,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2024-11-23 18:21:25,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-23 18:21:25,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:21:25,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:21:26,078 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_676 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_676) |c_~#c~0.base|) (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|))))))) is different from false [2024-11-23 18:21:26,429 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:21:26,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2024-11-23 18:21:26,463 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 18:21:26,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 55 [2024-11-23 18:21:26,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2024-11-23 18:21:37,841 INFO L349 Elim1Store]: treesize reduction 7, result has 96.7 percent of original size [2024-11-23 18:21:37,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 103 treesize of output 290 [2024-11-23 18:21:38,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-23 18:21:38,421 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:21:38,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321582124] [2024-11-23 18:21:38,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321582124] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:21:38,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:21:38,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2024-11-23 18:21:38,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685971114] [2024-11-23 18:21:38,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:21:38,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-23 18:21:38,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:21:38,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-23 18:21:38,425 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=246, Unknown=14, NotChecked=32, Total=342 [2024-11-23 18:21:39,082 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 133 [2024-11-23 18:21:39,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 129 transitions, 535 flow. Second operand has 19 states, 19 states have (on average 31.68421052631579) internal successors, (602), 19 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:39,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:21:39,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 133 [2024-11-23 18:21:39,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:21:43,288 INFO L124 PetriNetUnfolderBase]: 329/1031 cut-off events. [2024-11-23 18:21:43,288 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2024-11-23 18:21:43,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2076 conditions, 1031 events. 329/1031 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6067 event pairs, 292 based on Foata normal form. 6/807 useless extension candidates. Maximal degree in co-relation 1997. Up to 679 conditions per place. [2024-11-23 18:21:43,295 INFO L140 encePairwiseOnDemand]: 125/133 looper letters, 76 selfloop transitions, 26 changer transitions 0/132 dead transitions. [2024-11-23 18:21:43,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 132 transitions, 749 flow [2024-11-23 18:21:43,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 18:21:43,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-23 18:21:43,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 446 transitions. [2024-11-23 18:21:43,298 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2794486215538847 [2024-11-23 18:21:43,298 INFO L175 Difference]: Start difference. First operand has 151 places, 129 transitions, 535 flow. Second operand 12 states and 446 transitions. [2024-11-23 18:21:43,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 132 transitions, 749 flow [2024-11-23 18:21:43,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 132 transitions, 716 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-23 18:21:43,303 INFO L231 Difference]: Finished difference. Result has 159 places, 129 transitions, 563 flow [2024-11-23 18:21:43,303 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=563, PETRI_PLACES=159, PETRI_TRANSITIONS=129} [2024-11-23 18:21:43,304 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 41 predicate places. [2024-11-23 18:21:43,304 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 129 transitions, 563 flow [2024-11-23 18:21:43,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 31.68421052631579) internal successors, (602), 19 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:43,304 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:21:43,304 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 18:21:43,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-23 18:21:43,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:43,505 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-23 18:21:43,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:21:43,506 INFO L85 PathProgramCache]: Analyzing trace with hash 282754546, now seen corresponding path program 2 times [2024-11-23 18:21:43,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:21:43,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228131199] [2024-11-23 18:21:43,506 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:21:43,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:43,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:21:43,508 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:21:43,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-23 18:21:43,983 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:21:43,984 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:21:44,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-23 18:21:44,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:21:44,194 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-23 18:21:44,194 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:21:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-23 18:21:44,403 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:21:44,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228131199] [2024-11-23 18:21:44,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228131199] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:21:44,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:21:44,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2024-11-23 18:21:44,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302475103] [2024-11-23 18:21:44,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:21:44,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 18:21:44,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:21:44,404 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 18:21:44,404 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-23 18:21:44,405 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2024-11-23 18:21:44,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 129 transitions, 563 flow. Second operand has 6 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:44,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:21:44,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2024-11-23 18:21:44,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:21:45,320 INFO L124 PetriNetUnfolderBase]: 129/686 cut-off events. [2024-11-23 18:21:45,320 INFO L125 PetriNetUnfolderBase]: For 399/400 co-relation queries the response was YES. [2024-11-23 18:21:45,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1545 conditions, 686 events. 129/686 cut-off events. For 399/400 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2675 event pairs, 105 based on Foata normal form. 3/588 useless extension candidates. Maximal degree in co-relation 1461. Up to 261 conditions per place. [2024-11-23 18:21:45,325 INFO L140 encePairwiseOnDemand]: 129/133 looper letters, 95 selfloop transitions, 6 changer transitions 0/166 dead transitions. [2024-11-23 18:21:45,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 166 transitions, 1089 flow [2024-11-23 18:21:45,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 18:21:45,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 18:21:45,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 528 transitions. [2024-11-23 18:21:45,328 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6616541353383458 [2024-11-23 18:21:45,329 INFO L175 Difference]: Start difference. First operand has 159 places, 129 transitions, 563 flow. Second operand 6 states and 528 transitions. [2024-11-23 18:21:45,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 166 transitions, 1089 flow [2024-11-23 18:21:45,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 166 transitions, 973 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-11-23 18:21:45,336 INFO L231 Difference]: Finished difference. Result has 157 places, 132 transitions, 570 flow [2024-11-23 18:21:45,338 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=570, PETRI_PLACES=157, PETRI_TRANSITIONS=132} [2024-11-23 18:21:45,338 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 39 predicate places. [2024-11-23 18:21:45,338 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 132 transitions, 570 flow [2024-11-23 18:21:45,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:45,339 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:21:45,339 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2024-11-23 18:21:45,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-23 18:21:45,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:45,540 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-23 18:21:45,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:21:45,541 INFO L85 PathProgramCache]: Analyzing trace with hash 282754596, now seen corresponding path program 1 times [2024-11-23 18:21:45,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:21:45,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446526375] [2024-11-23 18:21:45,541 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 18:21:45,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:45,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:21:45,544 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:21:45,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-23 18:21:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 18:21:46,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 18:21:46,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:21:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:21:46,316 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:21:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:21:46,632 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:21:46,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446526375] [2024-11-23 18:21:46,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446526375] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:21:46,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:21:46,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-11-23 18:21:46,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298096484] [2024-11-23 18:21:46,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:21:46,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-23 18:21:46,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:21:46,634 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-23 18:21:46,634 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-11-23 18:21:46,635 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2024-11-23 18:21:46,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 132 transitions, 570 flow. Second operand has 12 states, 12 states have (on average 79.91666666666667) internal successors, (959), 12 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:46,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:21:46,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2024-11-23 18:21:46,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:21:48,656 INFO L124 PetriNetUnfolderBase]: 129/938 cut-off events. [2024-11-23 18:21:48,657 INFO L125 PetriNetUnfolderBase]: For 846/847 co-relation queries the response was YES. [2024-11-23 18:21:48,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2277 conditions, 938 events. 129/938 cut-off events. For 846/847 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2733 event pairs, 105 based on Foata normal form. 24/861 useless extension candidates. Maximal degree in co-relation 2193. Up to 274 conditions per place. [2024-11-23 18:21:48,660 INFO L140 encePairwiseOnDemand]: 129/133 looper letters, 96 selfloop transitions, 23 changer transitions 0/184 dead transitions. [2024-11-23 18:21:48,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 184 transitions, 1188 flow [2024-11-23 18:21:48,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 18:21:48,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-23 18:21:48,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1008 transitions. [2024-11-23 18:21:48,664 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.631578947368421 [2024-11-23 18:21:48,664 INFO L175 Difference]: Start difference. First operand has 157 places, 132 transitions, 570 flow. Second operand 12 states and 1008 transitions. [2024-11-23 18:21:48,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 184 transitions, 1188 flow [2024-11-23 18:21:48,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 184 transitions, 1178 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-23 18:21:48,674 INFO L231 Difference]: Finished difference. Result has 174 places, 145 transitions, 837 flow [2024-11-23 18:21:48,674 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=837, PETRI_PLACES=174, PETRI_TRANSITIONS=145} [2024-11-23 18:21:48,675 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 56 predicate places. [2024-11-23 18:21:48,675 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 145 transitions, 837 flow [2024-11-23 18:21:48,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 79.91666666666667) internal successors, (959), 12 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:48,676 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:21:48,676 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2024-11-23 18:21:48,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-23 18:21:48,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:48,877 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-23 18:21:48,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:21:48,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1934802140, now seen corresponding path program 2 times [2024-11-23 18:21:48,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:21:48,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296454489] [2024-11-23 18:21:48,878 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 18:21:48,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:48,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:21:48,881 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:21:48,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-23 18:21:49,752 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 18:21:49,752 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 18:21:49,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-23 18:21:49,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 18:21:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 2 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:21:50,444 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 18:21:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 2 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 18:21:51,482 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-23 18:21:51,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296454489] [2024-11-23 18:21:51,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296454489] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 18:21:51,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-23 18:21:51,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-11-23 18:21:51,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212984189] [2024-11-23 18:21:51,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-23 18:21:51,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-23 18:21:51,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-23 18:21:51,485 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-23 18:21:51,486 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2024-11-23 18:21:51,487 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2024-11-23 18:21:51,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 145 transitions, 837 flow. Second operand has 24 states, 24 states have (on average 80.45833333333333) internal successors, (1931), 24 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:51,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 18:21:51,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2024-11-23 18:21:51,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 18:21:57,473 INFO L124 PetriNetUnfolderBase]: 129/1442 cut-off events. [2024-11-23 18:21:57,473 INFO L125 PetriNetUnfolderBase]: For 3842/3843 co-relation queries the response was YES. [2024-11-23 18:21:57,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4207 conditions, 1442 events. 129/1442 cut-off events. For 3842/3843 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2824 event pairs, 105 based on Foata normal form. 48/1389 useless extension candidates. Maximal degree in co-relation 4115. Up to 274 conditions per place. [2024-11-23 18:21:57,480 INFO L140 encePairwiseOnDemand]: 129/133 looper letters, 156 selfloop transitions, 47 changer transitions 0/268 dead transitions. [2024-11-23 18:21:57,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 268 transitions, 2274 flow [2024-11-23 18:21:57,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-23 18:21:57,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-23 18:21:57,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1986 transitions. [2024-11-23 18:21:57,484 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6221804511278195 [2024-11-23 18:21:57,484 INFO L175 Difference]: Start difference. First operand has 174 places, 145 transitions, 837 flow. Second operand 24 states and 1986 transitions. [2024-11-23 18:21:57,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 268 transitions, 2274 flow [2024-11-23 18:21:57,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 268 transitions, 2262 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 18:21:57,501 INFO L231 Difference]: Finished difference. Result has 207 places, 170 transitions, 1466 flow [2024-11-23 18:21:57,501 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=133, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1466, PETRI_PLACES=207, PETRI_TRANSITIONS=170} [2024-11-23 18:21:57,502 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 89 predicate places. [2024-11-23 18:21:57,502 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 170 transitions, 1466 flow [2024-11-23 18:21:57,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 80.45833333333333) internal successors, (1931), 24 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 18:21:57,503 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 18:21:57,503 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 2, 1, 1, 1, 1, 1] [2024-11-23 18:21:57,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-23 18:21:57,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:57,704 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2024-11-23 18:21:57,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 18:21:57,705 INFO L85 PathProgramCache]: Analyzing trace with hash -26112732, now seen corresponding path program 3 times [2024-11-23 18:21:57,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-23 18:21:57,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2125375313] [2024-11-23 18:21:57,707 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 18:21:57,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 18:21:57,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 18:21:57,711 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 18:21:57,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe7cd434-318b-489a-b99f-8ad61cc17c98/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process