./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 d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/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_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1 --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-d790fec [2024-12-02 11:55:05,276 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 11:55:05,335 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 11:55:05,340 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 11:55:05,340 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 11:55:05,363 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 11:55:05,364 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 11:55:05,364 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 11:55:05,364 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 11:55:05,365 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 11:55:05,365 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 11:55:05,365 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 11:55:05,365 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 11:55:05,365 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 11:55:05,365 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 11:55:05,366 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 11:55:05,366 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 11:55:05,366 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 11:55:05,366 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 11:55:05,366 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 11:55:05,366 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 11:55:05,366 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 11:55:05,366 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 11:55:05,366 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 11:55:05,366 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 11:55:05,366 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 11:55:05,366 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 11:55:05,367 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 11:55:05,367 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 11:55:05,367 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 11:55:05,367 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 11:55:05,367 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 11:55:05,367 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 11:55:05,367 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 11:55:05,367 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 11:55:05,367 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 11:55:05,367 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 11:55:05,368 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 11:55:05,368 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 11:55:05,368 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 11:55:05,368 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 11:55:05,368 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 11:55:05,368 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 11:55:05,368 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 11:55:05,368 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 11:55:05,368 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 11:55:05,368 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 11:55:05,369 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_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1 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 [2024-12-02 11:55:05,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 11:55:05,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 11:55:05,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 11:55:05,621 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 11:55:05,621 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 11:55:05,622 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2024-12-02 11:55:08,306 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/data/a0a0fd18c/42d46a86027d4a1c9c63125ca368d970/FLAGbd3197a51 [2024-12-02 11:55:08,528 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 11:55:08,528 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2024-12-02 11:55:08,544 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/data/a0a0fd18c/42d46a86027d4a1c9c63125ca368d970/FLAGbd3197a51 [2024-12-02 11:55:08,559 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/data/a0a0fd18c/42d46a86027d4a1c9c63125ca368d970 [2024-12-02 11:55:08,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 11:55:08,563 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 11:55:08,564 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 11:55:08,564 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 11:55:08,567 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 11:55:08,568 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 11:55:08" (1/1) ... [2024-12-02 11:55:08,568 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@634c0527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:55:08, skipping insertion in model container [2024-12-02 11:55:08,569 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 11:55:08" (1/1) ... [2024-12-02 11:55:08,603 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 11:55:08,981 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 11:55:08,981 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 11:55:08,982 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 11:55:08,982 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 11:55:09,008 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 11:55:09,043 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) [2024-12-02 11:55:09,044 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@606eea5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:55:09, skipping insertion in model container [2024-12-02 11:55:09,044 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 11:55:09,044 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-12-02 11:55:09,046 INFO L158 Benchmark]: Toolchain (without parser) took 482.57ms. Allocated memory is still 117.4MB. Free memory was 90.6MB in the beginning and 73.6MB in the end (delta: 17.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-12-02 11:55:09,046 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 117.4MB. Free memory was 72.3MB in the beginning and 72.2MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 11:55:09,047 INFO L158 Benchmark]: CACSL2BoogieTranslator took 480.56ms. Allocated memory is still 117.4MB. Free memory was 90.6MB in the beginning and 73.6MB in the end (delta: 17.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-12-02 11:55:09,048 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 117.4MB. Free memory was 72.3MB in the beginning and 72.2MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 480.56ms. Allocated memory is still 117.4MB. Free memory was 90.6MB in the beginning and 73.6MB in the end (delta: 17.0MB). 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_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/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_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1 --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-d790fec [2024-12-02 11:55:10,876 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 11:55:10,963 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-12-02 11:55:10,969 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 11:55:10,969 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 11:55:10,992 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 11:55:10,993 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 11:55:10,993 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 11:55:10,994 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 11:55:10,994 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 11:55:10,994 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 11:55:10,994 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 11:55:10,994 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 11:55:10,995 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 11:55:10,995 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 11:55:10,995 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 11:55:10,995 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 11:55:10,995 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 11:55:10,995 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 11:55:10,995 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 11:55:10,995 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 11:55:10,995 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 11:55:10,996 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 11:55:10,996 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 11:55:10,996 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 11:55:10,996 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-12-02 11:55:10,996 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-12-02 11:55:10,996 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 11:55:10,996 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 11:55:10,996 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 11:55:10,996 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 11:55:10,996 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 11:55:10,996 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 11:55:10,997 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 11:55:10,997 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 11:55:10,997 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 11:55:10,997 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 11:55:10,997 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 11:55:10,997 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 11:55:10,997 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 11:55:10,997 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 11:55:10,997 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 11:55:10,998 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 11:55:10,998 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-12-02 11:55:10,998 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-12-02 11:55:10,998 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 11:55:10,998 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 11:55:10,998 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 11:55:10,998 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 11:55:10,998 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_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1 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 [2024-12-02 11:55:11,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 11:55:11,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 11:55:11,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 11:55:11,266 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 11:55:11,266 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 11:55:11,268 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2024-12-02 11:55:14,002 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/data/70153d815/13fab1e5af564b2f8290692372e7bca9/FLAGed6047c08 [2024-12-02 11:55:14,260 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 11:55:14,261 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/sv-benchmarks/c/goblint-regression/28-race_reach_92-evilcollapse_racing-deref.i [2024-12-02 11:55:14,277 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/data/70153d815/13fab1e5af564b2f8290692372e7bca9/FLAGed6047c08 [2024-12-02 11:55:14,292 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/data/70153d815/13fab1e5af564b2f8290692372e7bca9 [2024-12-02 11:55:14,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 11:55:14,296 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 11:55:14,298 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 11:55:14,298 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 11:55:14,302 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 11:55:14,302 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 11:55:14" (1/1) ... [2024-12-02 11:55:14,303 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e256797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:55:14, skipping insertion in model container [2024-12-02 11:55:14,303 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 11:55:14" (1/1) ... [2024-12-02 11:55:14,337 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 11:55:14,707 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 11:55:14,708 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 11:55:14,708 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 11:55:14,708 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 11:55:14,736 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 11:55:14,778 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-12-02 11:55:14,787 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 11:55:14,825 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 11:55:14,826 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 11:55:14,826 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 11:55:14,826 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 11:55:14,840 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 11:55:14,860 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 11:55:14,909 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 11:55:14,909 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 11:55:14,909 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 11:55:14,910 WARN L1675 CHandler]: Possible shadowing of function new [2024-12-02 11:55:14,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 11:55:14,994 INFO L204 MainTranslator]: Completed translation [2024-12-02 11:55:14,995 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:55:14 WrapperNode [2024-12-02 11:55:14,995 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 11:55:14,996 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 11:55:14,996 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 11:55:14,996 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 11:55:15,003 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:55:14" (1/1) ... [2024-12-02 11:55:15,024 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:55:14" (1/1) ... [2024-12-02 11:55:15,057 INFO L138 Inliner]: procedures = 284, calls = 126, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 292 [2024-12-02 11:55:15,057 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 11:55:15,058 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 11:55:15,058 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 11:55:15,058 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 11:55:15,069 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:55:14" (1/1) ... [2024-12-02 11:55:15,069 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:55:14" (1/1) ... [2024-12-02 11:55:15,075 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:55:14" (1/1) ... [2024-12-02 11:55:15,099 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]. [2024-12-02 11:55:15,099 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:55:14" (1/1) ... [2024-12-02 11:55:15,099 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:55:14" (1/1) ... [2024-12-02 11:55:15,122 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:55:14" (1/1) ... [2024-12-02 11:55:15,123 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:55:14" (1/1) ... [2024-12-02 11:55:15,128 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:55:14" (1/1) ... [2024-12-02 11:55:15,132 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:55:14" (1/1) ... [2024-12-02 11:55:15,134 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:55:14" (1/1) ... [2024-12-02 11:55:15,140 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 11:55:15,141 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 11:55:15,141 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 11:55:15,141 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 11:55:15,142 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:55:14" (1/1) ... [2024-12-02 11:55:15,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 11:55:15,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:55:15,176 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 11:55:15,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 11:55:15,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-12-02 11:55:15,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-12-02 11:55:15,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2024-12-02 11:55:15,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2024-12-02 11:55:15,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-12-02 11:55:15,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-12-02 11:55:15,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-12-02 11:55:15,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-12-02 11:55:15,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-12-02 11:55:15,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-12-02 11:55:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-12-02 11:55:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-12-02 11:55:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2024-12-02 11:55:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2024-12-02 11:55:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-12-02 11:55:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-12-02 11:55:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-12-02 11:55:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-12-02 11:55:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-12-02 11:55:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-12-02 11:55:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-12-02 11:55:15,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2024-12-02 11:55:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2024-12-02 11:55:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2024-12-02 11:55:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2024-12-02 11:55:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2024-12-02 11:55:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-12-02 11:55:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-12-02 11:55:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 11:55:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 11:55:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-12-02 11:55:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-12-02 11:55:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-12-02 11:55:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-12-02 11:55:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-12-02 11:55:15,202 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-12-02 11:55:15,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 11:55:15,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 11:55:15,203 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-12-02 11:55:15,362 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 11:55:15,364 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 11:55:16,323 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 11:55:16,324 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 11:55:17,772 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 11:55:17,772 INFO L312 CfgBuilder]: Removed 11 assume(true) statements. [2024-12-02 11:55:17,773 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 11:55:17 BoogieIcfgContainer [2024-12-02 11:55:17,773 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 11:55:17,776 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 11:55:17,776 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 11:55:17,781 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 11:55:17,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 11:55:14" (1/3) ... [2024-12-02 11:55:17,782 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5d169b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 11:55:17, skipping insertion in model container [2024-12-02 11:55:17,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:55:14" (2/3) ... [2024-12-02 11:55:17,782 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c5d169b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 11:55:17, skipping insertion in model container [2024-12-02 11:55:17,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 11:55:17" (3/3) ... [2024-12-02 11:55:17,784 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_92-evilcollapse_racing-deref.i [2024-12-02 11:55:17,802 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 11:55:17,803 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. [2024-12-02 11:55:17,803 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 11:55:17,911 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-12-02 11:55:17,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 133 transitions, 273 flow [2024-12-02 11:55:18,017 INFO L124 PetriNetUnfolderBase]: 18/145 cut-off events. [2024-12-02 11:55:18,020 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-12-02 11:55:18,024 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. [2024-12-02 11:55:18,024 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 133 transitions, 273 flow [2024-12-02 11:55:18,029 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 133 transitions, 273 flow [2024-12-02 11:55:18,038 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 11:55:18,051 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;@690467a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 11:55:18,051 INFO L334 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2024-12-02 11:55:18,067 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 11:55:18,067 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-12-02 11:55:18,067 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 11:55:18,068 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:55:18,068 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 11:55:18,069 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)] === [2024-12-02 11:55:18,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:55:18,075 INFO L85 PathProgramCache]: Analyzing trace with hash 839012, now seen corresponding path program 1 times [2024-12-02 11:55:18,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 11:55:18,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341474768] [2024-12-02 11:55:18,089 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:55:18,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:18,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:55:18,092 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:55:18,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 11:55:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:55:18,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 11:55:18,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:55:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:55:18,574 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 11:55:18,574 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 11:55:18,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341474768] [2024-12-02 11:55:18,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341474768] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:55:18,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:55:18,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 11:55:18,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376201180] [2024-12-02 11:55:18,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:55:18,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 11:55:18,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 11:55:18,616 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 11:55:18,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 11:55:18,868 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 133 [2024-12-02 11:55:18,871 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) [2024-12-02 11:55:18,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:55:18,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 133 [2024-12-02 11:55:18,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:55:19,443 INFO L124 PetriNetUnfolderBase]: 125/490 cut-off events. [2024-12-02 11:55:19,443 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2024-12-02 11:55:19,445 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. [2024-12-02 11:55:19,450 INFO L140 encePairwiseOnDemand]: 112/133 looper letters, 66 selfloop transitions, 4 changer transitions 0/139 dead transitions. [2024-12-02 11:55:19,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 139 transitions, 425 flow [2024-12-02 11:55:19,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 11:55:19,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 11:55:19,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 375 transitions. [2024-12-02 11:55:19,467 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7048872180451128 [2024-12-02 11:55:19,469 INFO L175 Difference]: Start difference. First operand has 118 places, 133 transitions, 273 flow. Second operand 4 states and 375 transitions. [2024-12-02 11:55:19,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 139 transitions, 425 flow [2024-12-02 11:55:19,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 139 transitions, 425 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-12-02 11:55:19,482 INFO L231 Difference]: Finished difference. Result has 117 places, 116 transitions, 253 flow [2024-12-02 11:55:19,485 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} [2024-12-02 11:55:19,489 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2024-12-02 11:55:19,489 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 116 transitions, 253 flow [2024-12-02 11:55:19,490 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) [2024-12-02 11:55:19,490 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:55:19,490 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 11:55:19,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 11:55:19,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:19,691 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)] === [2024-12-02 11:55:19,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:55:19,691 INFO L85 PathProgramCache]: Analyzing trace with hash 838963, now seen corresponding path program 1 times [2024-12-02 11:55:19,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 11:55:19,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414597246] [2024-12-02 11:55:19,692 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:55:19,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:19,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:55:19,694 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:55:19,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 11:55:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:55:19,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-12-02 11:55:19,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:55:20,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:55:20,001 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 11:55:20,001 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 11:55:20,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414597246] [2024-12-02 11:55:20,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414597246] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:55:20,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:55:20,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 11:55:20,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593085595] [2024-12-02 11:55:20,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:55:20,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 11:55:20,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 11:55:20,003 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 11:55:20,003 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 11:55:20,005 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2024-12-02 11:55:20,005 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) [2024-12-02 11:55:20,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:55:20,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2024-12-02 11:55:20,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:55:20,393 INFO L124 PetriNetUnfolderBase]: 127/547 cut-off events. [2024-12-02 11:55:20,393 INFO L125 PetriNetUnfolderBase]: For 25/26 co-relation queries the response was YES. [2024-12-02 11:55:20,395 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. [2024-12-02 11:55:20,398 INFO L140 encePairwiseOnDemand]: 130/133 looper letters, 50 selfloop transitions, 2 changer transitions 0/124 dead transitions. [2024-12-02 11:55:20,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 124 transitions, 379 flow [2024-12-02 11:55:20,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 11:55:20,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 11:55:20,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2024-12-02 11:55:20,401 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7042606516290727 [2024-12-02 11:55:20,401 INFO L175 Difference]: Start difference. First operand has 117 places, 116 transitions, 253 flow. Second operand 3 states and 281 transitions. [2024-12-02 11:55:20,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 124 transitions, 379 flow [2024-12-02 11:55:20,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 124 transitions, 367 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 11:55:20,406 INFO L231 Difference]: Finished difference. Result has 117 places, 117 transitions, 257 flow [2024-12-02 11:55:20,407 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} [2024-12-02 11:55:20,408 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2024-12-02 11:55:20,408 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 117 transitions, 257 flow [2024-12-02 11:55:20,408 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) [2024-12-02 11:55:20,408 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:55:20,408 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 11:55:20,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 11:55:20,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:20,609 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)] === [2024-12-02 11:55:20,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:55:20,609 INFO L85 PathProgramCache]: Analyzing trace with hash 839013, now seen corresponding path program 1 times [2024-12-02 11:55:20,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 11:55:20,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051277628] [2024-12-02 11:55:20,610 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:55:20,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:20,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:55:20,612 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:55:20,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 11:55:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:55:20,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 11:55:20,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:55:21,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:55:21,000 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 11:55:21,000 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 11:55:21,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051277628] [2024-12-02 11:55:21,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051277628] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:55:21,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:55:21,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 11:55:21,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029170949] [2024-12-02 11:55:21,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:55:21,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 11:55:21,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 11:55:21,001 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 11:55:21,001 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 11:55:21,238 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 133 [2024-12-02 11:55:21,238 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) [2024-12-02 11:55:21,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:55:21,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 133 [2024-12-02 11:55:21,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:55:21,572 INFO L124 PetriNetUnfolderBase]: 128/547 cut-off events. [2024-12-02 11:55:21,573 INFO L125 PetriNetUnfolderBase]: For 7/8 co-relation queries the response was YES. [2024-12-02 11:55:21,574 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. [2024-12-02 11:55:21,576 INFO L140 encePairwiseOnDemand]: 126/133 looper letters, 48 selfloop transitions, 5 changer transitions 0/121 dead transitions. [2024-12-02 11:55:21,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 121 transitions, 376 flow [2024-12-02 11:55:21,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 11:55:21,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 11:55:21,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 342 transitions. [2024-12-02 11:55:21,578 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-12-02 11:55:21,578 INFO L175 Difference]: Start difference. First operand has 117 places, 117 transitions, 257 flow. Second operand 4 states and 342 transitions. [2024-12-02 11:55:21,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 121 transitions, 376 flow [2024-12-02 11:55:21,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 121 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 11:55:21,581 INFO L231 Difference]: Finished difference. Result has 121 places, 121 transitions, 296 flow [2024-12-02 11:55:21,582 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} [2024-12-02 11:55:21,583 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 3 predicate places. [2024-12-02 11:55:21,583 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 121 transitions, 296 flow [2024-12-02 11:55:21,583 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) [2024-12-02 11:55:21,583 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:55:21,583 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-12-02 11:55:21,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 11:55:21,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:21,784 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)] === [2024-12-02 11:55:21,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:55:21,784 INFO L85 PathProgramCache]: Analyzing trace with hash -773991819, now seen corresponding path program 1 times [2024-12-02 11:55:21,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 11:55:21,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896501685] [2024-12-02 11:55:21,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:55:21,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:21,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:55:21,787 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:55:21,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 11:55:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:55:22,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 11:55:22,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:55:22,041 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 [2024-12-02 11:55:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:55:22,048 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 11:55:22,048 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 11:55:22,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896501685] [2024-12-02 11:55:22,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896501685] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:55:22,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:55:22,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 11:55:22,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312123689] [2024-12-02 11:55:22,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:55:22,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 11:55:22,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 11:55:22,049 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 11:55:22,049 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 11:55:22,183 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 133 [2024-12-02 11:55:22,184 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) [2024-12-02 11:55:22,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:55:22,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 133 [2024-12-02 11:55:22,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:55:22,462 INFO L124 PetriNetUnfolderBase]: 128/545 cut-off events. [2024-12-02 11:55:22,462 INFO L125 PetriNetUnfolderBase]: For 15/16 co-relation queries the response was YES. [2024-12-02 11:55:22,463 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. [2024-12-02 11:55:22,466 INFO L140 encePairwiseOnDemand]: 130/133 looper letters, 46 selfloop transitions, 3 changer transitions 0/120 dead transitions. [2024-12-02 11:55:22,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 120 transitions, 392 flow [2024-12-02 11:55:22,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 11:55:22,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 11:55:22,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2024-12-02 11:55:22,468 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6766917293233082 [2024-12-02 11:55:22,468 INFO L175 Difference]: Start difference. First operand has 121 places, 121 transitions, 296 flow. Second operand 3 states and 270 transitions. [2024-12-02 11:55:22,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 120 transitions, 392 flow [2024-12-02 11:55:22,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 120 transitions, 389 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 11:55:22,472 INFO L231 Difference]: Finished difference. Result has 121 places, 120 transitions, 297 flow [2024-12-02 11:55:22,472 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} [2024-12-02 11:55:22,473 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 3 predicate places. [2024-12-02 11:55:22,473 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 120 transitions, 297 flow [2024-12-02 11:55:22,473 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) [2024-12-02 11:55:22,473 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:55:22,473 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-12-02 11:55:22,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 11:55:22,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:22,674 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)] === [2024-12-02 11:55:22,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:55:22,674 INFO L85 PathProgramCache]: Analyzing trace with hash -773991818, now seen corresponding path program 1 times [2024-12-02 11:55:22,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 11:55:22,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555038813] [2024-12-02 11:55:22,675 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:55:22,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:22,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:55:22,677 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:55:22,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 11:55:22,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:55:22,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 11:55:22,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:55:22,931 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 [2024-12-02 11:55:22,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:55:22,943 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 11:55:22,943 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 11:55:22,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555038813] [2024-12-02 11:55:22,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555038813] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:55:22,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:55:22,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 11:55:22,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961889310] [2024-12-02 11:55:22,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:55:22,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 11:55:22,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 11:55:22,944 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 11:55:22,944 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 11:55:23,095 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 133 [2024-12-02 11:55:23,095 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) [2024-12-02 11:55:23,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:55:23,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 133 [2024-12-02 11:55:23,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:55:23,358 INFO L124 PetriNetUnfolderBase]: 128/543 cut-off events. [2024-12-02 11:55:23,358 INFO L125 PetriNetUnfolderBase]: For 19/20 co-relation queries the response was YES. [2024-12-02 11:55:23,359 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. [2024-12-02 11:55:23,361 INFO L140 encePairwiseOnDemand]: 130/133 looper letters, 46 selfloop transitions, 3 changer transitions 0/119 dead transitions. [2024-12-02 11:55:23,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 119 transitions, 393 flow [2024-12-02 11:55:23,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 11:55:23,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 11:55:23,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2024-12-02 11:55:23,362 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6766917293233082 [2024-12-02 11:55:23,363 INFO L175 Difference]: Start difference. First operand has 121 places, 120 transitions, 297 flow. Second operand 3 states and 270 transitions. [2024-12-02 11:55:23,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 119 transitions, 393 flow [2024-12-02 11:55:23,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 119 transitions, 387 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 11:55:23,365 INFO L231 Difference]: Finished difference. Result has 120 places, 119 transitions, 295 flow [2024-12-02 11:55:23,365 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} [2024-12-02 11:55:23,366 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 2 predicate places. [2024-12-02 11:55:23,366 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 119 transitions, 295 flow [2024-12-02 11:55:23,366 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) [2024-12-02 11:55:23,366 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:55:23,366 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:55:23,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 11:55:23,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:23,567 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)] === [2024-12-02 11:55:23,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:55:23,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1776058254, now seen corresponding path program 1 times [2024-12-02 11:55:23,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 11:55:23,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301551498] [2024-12-02 11:55:23,568 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:55:23,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:23,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:55:23,570 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:55:23,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 11:55:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:55:23,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 11:55:23,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:55:23,824 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 [2024-12-02 11:55:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:55:23,851 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 11:55:23,851 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 11:55:23,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301551498] [2024-12-02 11:55:23,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301551498] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:55:23,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:55:23,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 11:55:23,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94528441] [2024-12-02 11:55:23,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:55:23,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 11:55:23,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 11:55:23,852 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 11:55:23,852 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 11:55:24,071 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 133 [2024-12-02 11:55:24,071 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) [2024-12-02 11:55:24,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:55:24,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 133 [2024-12-02 11:55:24,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:55:24,387 INFO L124 PetriNetUnfolderBase]: 128/539 cut-off events. [2024-12-02 11:55:24,387 INFO L125 PetriNetUnfolderBase]: For 20/21 co-relation queries the response was YES. [2024-12-02 11:55:24,388 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. [2024-12-02 11:55:24,389 INFO L140 encePairwiseOnDemand]: 128/133 looper letters, 47 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2024-12-02 11:55:24,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 117 transitions, 393 flow [2024-12-02 11:55:24,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 11:55:24,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 11:55:24,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 332 transitions. [2024-12-02 11:55:24,390 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6240601503759399 [2024-12-02 11:55:24,390 INFO L175 Difference]: Start difference. First operand has 120 places, 119 transitions, 295 flow. Second operand 4 states and 332 transitions. [2024-12-02 11:55:24,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 117 transitions, 393 flow [2024-12-02 11:55:24,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 117 transitions, 387 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 11:55:24,392 INFO L231 Difference]: Finished difference. Result has 119 places, 117 transitions, 293 flow [2024-12-02 11:55:24,392 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} [2024-12-02 11:55:24,393 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2024-12-02 11:55:24,393 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 117 transitions, 293 flow [2024-12-02 11:55:24,394 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) [2024-12-02 11:55:24,394 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:55:24,394 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:55:24,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 11:55:24,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:24,594 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)] === [2024-12-02 11:55:24,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:55:24,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1776058253, now seen corresponding path program 1 times [2024-12-02 11:55:24,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 11:55:24,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909857773] [2024-12-02 11:55:24,595 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:55:24,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:24,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:55:24,597 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:55:24,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 11:55:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:55:24,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 11:55:24,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:55:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:55:24,831 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 11:55:24,831 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 11:55:24,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909857773] [2024-12-02 11:55:24,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909857773] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:55:24,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:55:24,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 11:55:24,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607640580] [2024-12-02 11:55:24,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:55:24,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 11:55:24,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 11:55:24,832 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 11:55:24,832 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 11:55:24,926 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 133 [2024-12-02 11:55:24,926 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) [2024-12-02 11:55:24,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:55:24,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 133 [2024-12-02 11:55:24,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:55:25,189 INFO L124 PetriNetUnfolderBase]: 128/535 cut-off events. [2024-12-02 11:55:25,189 INFO L125 PetriNetUnfolderBase]: For 12/13 co-relation queries the response was YES. [2024-12-02 11:55:25,190 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. [2024-12-02 11:55:25,191 INFO L140 encePairwiseOnDemand]: 127/133 looper letters, 46 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2024-12-02 11:55:25,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 115 transitions, 391 flow [2024-12-02 11:55:25,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 11:55:25,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 11:55:25,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2024-12-02 11:55:25,192 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6466165413533834 [2024-12-02 11:55:25,193 INFO L175 Difference]: Start difference. First operand has 119 places, 117 transitions, 293 flow. Second operand 3 states and 258 transitions. [2024-12-02 11:55:25,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 115 transitions, 391 flow [2024-12-02 11:55:25,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 115 transitions, 383 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 11:55:25,196 INFO L231 Difference]: Finished difference. Result has 116 places, 115 transitions, 291 flow [2024-12-02 11:55:25,196 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} [2024-12-02 11:55:25,196 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, -2 predicate places. [2024-12-02 11:55:25,197 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 115 transitions, 291 flow [2024-12-02 11:55:25,197 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) [2024-12-02 11:55:25,197 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:55:25,197 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:55:25,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 11:55:25,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:25,398 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)] === [2024-12-02 11:55:25,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:55:25,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1776062450, now seen corresponding path program 1 times [2024-12-02 11:55:25,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 11:55:25,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232845292] [2024-12-02 11:55:25,398 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:55:25,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:25,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:55:25,400 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:55:25,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 11:55:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:55:25,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-12-02 11:55:25,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:55:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:55:25,624 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 11:55:25,624 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 11:55:25,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232845292] [2024-12-02 11:55:25,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232845292] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:55:25,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:55:25,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 11:55:25,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714370192] [2024-12-02 11:55:25,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:55:25,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 11:55:25,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 11:55:25,625 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 11:55:25,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 11:55:25,625 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2024-12-02 11:55:25,625 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) [2024-12-02 11:55:25,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:55:25,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2024-12-02 11:55:25,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:55:25,871 INFO L124 PetriNetUnfolderBase]: 127/571 cut-off events. [2024-12-02 11:55:25,871 INFO L125 PetriNetUnfolderBase]: For 19/20 co-relation queries the response was YES. [2024-12-02 11:55:25,872 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. [2024-12-02 11:55:25,873 INFO L140 encePairwiseOnDemand]: 130/133 looper letters, 50 selfloop transitions, 3 changer transitions 0/119 dead transitions. [2024-12-02 11:55:25,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 119 transitions, 407 flow [2024-12-02 11:55:25,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 11:55:25,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 11:55:25,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2024-12-02 11:55:25,875 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6967418546365914 [2024-12-02 11:55:25,875 INFO L175 Difference]: Start difference. First operand has 116 places, 115 transitions, 291 flow. Second operand 3 states and 278 transitions. [2024-12-02 11:55:25,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 119 transitions, 407 flow [2024-12-02 11:55:25,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 119 transitions, 393 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 11:55:25,879 INFO L231 Difference]: Finished difference. Result has 117 places, 115 transitions, 290 flow [2024-12-02 11:55:25,879 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} [2024-12-02 11:55:25,879 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2024-12-02 11:55:25,880 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 115 transitions, 290 flow [2024-12-02 11:55:25,880 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) [2024-12-02 11:55:25,880 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:55:25,880 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:55:25,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 11:55:26,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:26,081 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)] === [2024-12-02 11:55:26,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:55:26,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1689992218, now seen corresponding path program 1 times [2024-12-02 11:55:26,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 11:55:26,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738680535] [2024-12-02 11:55:26,082 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:55:26,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:26,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:55:26,084 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:55:26,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 11:55:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:55:26,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 11:55:26,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:55:26,380 INFO L349 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2024-12-02 11:55:26,380 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 [2024-12-02 11:55:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:55:26,474 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 11:55:26,474 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 11:55:26,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738680535] [2024-12-02 11:55:26,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738680535] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:55:26,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:55:26,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 11:55:26,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914646966] [2024-12-02 11:55:26,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:55:26,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 11:55:26,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 11:55:26,475 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 11:55:26,475 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 11:55:26,876 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 133 [2024-12-02 11:55:26,877 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) [2024-12-02 11:55:26,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:55:26,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 133 [2024-12-02 11:55:26,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:55:27,262 INFO L124 PetriNetUnfolderBase]: 126/537 cut-off events. [2024-12-02 11:55:27,262 INFO L125 PetriNetUnfolderBase]: For 27/28 co-relation queries the response was YES. [2024-12-02 11:55:27,263 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. [2024-12-02 11:55:27,264 INFO L140 encePairwiseOnDemand]: 127/133 looper letters, 70 selfloop transitions, 5 changer transitions 0/136 dead transitions. [2024-12-02 11:55:27,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 136 transitions, 482 flow [2024-12-02 11:55:27,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 11:55:27,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 11:55:27,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 348 transitions. [2024-12-02 11:55:27,266 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6541353383458647 [2024-12-02 11:55:27,266 INFO L175 Difference]: Start difference. First operand has 117 places, 115 transitions, 290 flow. Second operand 4 states and 348 transitions. [2024-12-02 11:55:27,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 136 transitions, 482 flow [2024-12-02 11:55:27,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 136 transitions, 479 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 11:55:27,268 INFO L231 Difference]: Finished difference. Result has 117 places, 113 transitions, 293 flow [2024-12-02 11:55:27,268 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} [2024-12-02 11:55:27,268 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, -1 predicate places. [2024-12-02 11:55:27,268 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 113 transitions, 293 flow [2024-12-02 11:55:27,269 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) [2024-12-02 11:55:27,269 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:55:27,269 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:55:27,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 11:55:27,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:27,469 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)] === [2024-12-02 11:55:27,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:55:27,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1689992219, now seen corresponding path program 1 times [2024-12-02 11:55:27,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 11:55:27,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559901215] [2024-12-02 11:55:27,470 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:55:27,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:27,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:55:27,472 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:55:27,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 11:55:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:55:27,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 11:55:27,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:55:27,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 11:55:27,831 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 [2024-12-02 11:55:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:55:27,899 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 11:55:27,899 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 11:55:27,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559901215] [2024-12-02 11:55:27,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559901215] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:55:27,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:55:27,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 11:55:27,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333499962] [2024-12-02 11:55:27,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:55:27,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 11:55:27,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 11:55:27,900 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 11:55:27,900 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 11:55:28,226 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 133 [2024-12-02 11:55:28,226 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) [2024-12-02 11:55:28,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:55:28,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 133 [2024-12-02 11:55:28,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:55:28,621 INFO L124 PetriNetUnfolderBase]: 128/561 cut-off events. [2024-12-02 11:55:28,621 INFO L125 PetriNetUnfolderBase]: For 53/54 co-relation queries the response was YES. [2024-12-02 11:55:28,622 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. [2024-12-02 11:55:28,623 INFO L140 encePairwiseOnDemand]: 127/133 looper letters, 53 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2024-12-02 11:55:28,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 119 transitions, 433 flow [2024-12-02 11:55:28,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 11:55:28,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 11:55:28,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 341 transitions. [2024-12-02 11:55:28,625 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6409774436090225 [2024-12-02 11:55:28,625 INFO L175 Difference]: Start difference. First operand has 117 places, 113 transitions, 293 flow. Second operand 4 states and 341 transitions. [2024-12-02 11:55:28,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 119 transitions, 433 flow [2024-12-02 11:55:28,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 119 transitions, 417 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 11:55:28,627 INFO L231 Difference]: Finished difference. Result has 119 places, 116 transitions, 321 flow [2024-12-02 11:55:28,627 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} [2024-12-02 11:55:28,628 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2024-12-02 11:55:28,628 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 116 transitions, 321 flow [2024-12-02 11:55:28,628 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) [2024-12-02 11:55:28,628 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:55:28,628 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:55:28,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 11:55:28,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:28,829 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)] === [2024-12-02 11:55:28,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:55:28,829 INFO L85 PathProgramCache]: Analyzing trace with hash 850152137, now seen corresponding path program 1 times [2024-12-02 11:55:28,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 11:55:28,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158681836] [2024-12-02 11:55:28,830 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:55:28,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:28,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:55:28,831 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:55:28,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 11:55:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:55:29,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-12-02 11:55:29,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:55:29,232 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 [2024-12-02 11:55:29,241 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 [2024-12-02 11:55:29,317 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 [2024-12-02 11:55:29,328 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 [2024-12-02 11:55:29,409 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-02 11:55:29,410 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 [2024-12-02 11:55:29,447 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-12-02 11:55:29,448 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 [2024-12-02 11:55:29,523 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 [2024-12-02 11:55:29,538 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 [2024-12-02 11:55:29,603 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 [2024-12-02 11:55:29,621 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 [2024-12-02 11:55:29,664 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 [2024-12-02 11:55:29,670 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 [2024-12-02 11:55:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:55:29,741 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 11:55:29,742 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 11:55:29,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158681836] [2024-12-02 11:55:29,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158681836] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:55:29,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:55:29,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-12-02 11:55:29,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518161390] [2024-12-02 11:55:29,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:55:29,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 11:55:29,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 11:55:29,743 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 11:55:29,743 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-12-02 11:55:31,563 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 133 [2024-12-02 11:55:31,563 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) [2024-12-02 11:55:31,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:55:31,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 133 [2024-12-02 11:55:31,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:55:32,415 INFO L124 PetriNetUnfolderBase]: 128/560 cut-off events. [2024-12-02 11:55:32,415 INFO L125 PetriNetUnfolderBase]: For 26/27 co-relation queries the response was YES. [2024-12-02 11:55:32,416 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. [2024-12-02 11:55:32,417 INFO L140 encePairwiseOnDemand]: 121/133 looper letters, 68 selfloop transitions, 11 changer transitions 0/132 dead transitions. [2024-12-02 11:55:32,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 132 transitions, 517 flow [2024-12-02 11:55:32,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 11:55:32,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 11:55:32,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 695 transitions. [2024-12-02 11:55:32,419 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4750512645249487 [2024-12-02 11:55:32,419 INFO L175 Difference]: Start difference. First operand has 119 places, 116 transitions, 321 flow. Second operand 11 states and 695 transitions. [2024-12-02 11:55:32,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 132 transitions, 517 flow [2024-12-02 11:55:32,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 132 transitions, 513 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 11:55:32,421 INFO L231 Difference]: Finished difference. Result has 132 places, 121 transitions, 375 flow [2024-12-02 11:55:32,421 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} [2024-12-02 11:55:32,422 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 14 predicate places. [2024-12-02 11:55:32,422 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 121 transitions, 375 flow [2024-12-02 11:55:32,422 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) [2024-12-02 11:55:32,422 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:55:32,422 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:55:32,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 11:55:32,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:32,623 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)] === [2024-12-02 11:55:32,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:55:32,623 INFO L85 PathProgramCache]: Analyzing trace with hash 850152136, now seen corresponding path program 1 times [2024-12-02 11:55:32,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 11:55:32,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665284127] [2024-12-02 11:55:32,623 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:55:32,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:32,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:55:32,625 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:55:32,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 11:55:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:55:32,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-12-02 11:55:32,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:55:32,978 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 [2024-12-02 11:55:33,027 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 [2024-12-02 11:55:33,068 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-12-02 11:55:33,068 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 [2024-12-02 11:55:33,110 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 [2024-12-02 11:55:33,147 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 [2024-12-02 11:55:33,168 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 [2024-12-02 11:55:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:55:33,213 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 11:55:33,213 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 11:55:33,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665284127] [2024-12-02 11:55:33,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665284127] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:55:33,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:55:33,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-12-02 11:55:33,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518420445] [2024-12-02 11:55:33,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:55:33,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 11:55:33,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 11:55:33,214 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 11:55:33,214 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-12-02 11:55:34,531 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 133 [2024-12-02 11:55:34,532 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) [2024-12-02 11:55:34,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:55:34,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 133 [2024-12-02 11:55:34,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:55:35,467 INFO L124 PetriNetUnfolderBase]: 128/559 cut-off events. [2024-12-02 11:55:35,467 INFO L125 PetriNetUnfolderBase]: For 36/37 co-relation queries the response was YES. [2024-12-02 11:55:35,468 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. [2024-12-02 11:55:35,469 INFO L140 encePairwiseOnDemand]: 121/133 looper letters, 66 selfloop transitions, 11 changer transitions 0/132 dead transitions. [2024-12-02 11:55:35,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 132 transitions, 559 flow [2024-12-02 11:55:35,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 11:55:35,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 11:55:35,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 715 transitions. [2024-12-02 11:55:35,471 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48872180451127817 [2024-12-02 11:55:35,472 INFO L175 Difference]: Start difference. First operand has 132 places, 121 transitions, 375 flow. Second operand 11 states and 715 transitions. [2024-12-02 11:55:35,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 132 transitions, 559 flow [2024-12-02 11:55:35,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 132 transitions, 555 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 11:55:35,474 INFO L231 Difference]: Finished difference. Result has 141 places, 121 transitions, 397 flow [2024-12-02 11:55:35,474 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} [2024-12-02 11:55:35,475 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 23 predicate places. [2024-12-02 11:55:35,475 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 121 transitions, 397 flow [2024-12-02 11:55:35,475 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) [2024-12-02 11:55:35,475 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:55:35,475 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:55:35,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 11:55:35,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:35,676 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)] === [2024-12-02 11:55:35,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:55:35,676 INFO L85 PathProgramCache]: Analyzing trace with hash 584913268, now seen corresponding path program 1 times [2024-12-02 11:55:35,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 11:55:35,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789097310] [2024-12-02 11:55:35,677 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:55:35,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:35,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:55:35,678 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:55:35,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 11:55:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:55:35,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 11:55:35,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:55:35,945 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 [2024-12-02 11:55:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:55:35,987 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 11:55:35,987 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 11:55:35,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789097310] [2024-12-02 11:55:35,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789097310] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:55:35,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:55:35,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 11:55:35,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199844116] [2024-12-02 11:55:35,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:55:35,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 11:55:35,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 11:55:35,988 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 11:55:35,988 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 11:55:36,134 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 133 [2024-12-02 11:55:36,134 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) [2024-12-02 11:55:36,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:55:36,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 133 [2024-12-02 11:55:36,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:55:36,414 INFO L124 PetriNetUnfolderBase]: 127/549 cut-off events. [2024-12-02 11:55:36,414 INFO L125 PetriNetUnfolderBase]: For 69/70 co-relation queries the response was YES. [2024-12-02 11:55:36,415 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. [2024-12-02 11:55:36,416 INFO L140 encePairwiseOnDemand]: 128/133 looper letters, 46 selfloop transitions, 9 changer transitions 0/119 dead transitions. [2024-12-02 11:55:36,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 119 transitions, 503 flow [2024-12-02 11:55:36,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 11:55:36,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 11:55:36,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 338 transitions. [2024-12-02 11:55:36,417 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6353383458646616 [2024-12-02 11:55:36,417 INFO L175 Difference]: Start difference. First operand has 141 places, 121 transitions, 397 flow. Second operand 4 states and 338 transitions. [2024-12-02 11:55:36,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 119 transitions, 503 flow [2024-12-02 11:55:36,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 119 transitions, 481 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-12-02 11:55:36,419 INFO L231 Difference]: Finished difference. Result has 132 places, 119 transitions, 389 flow [2024-12-02 11:55:36,419 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} [2024-12-02 11:55:36,420 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 14 predicate places. [2024-12-02 11:55:36,420 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 119 transitions, 389 flow [2024-12-02 11:55:36,420 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) [2024-12-02 11:55:36,420 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:55:36,420 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:55:36,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 11:55:36,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:36,621 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)] === [2024-12-02 11:55:36,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:55:36,621 INFO L85 PathProgramCache]: Analyzing trace with hash 584913267, now seen corresponding path program 1 times [2024-12-02 11:55:36,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 11:55:36,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400229776] [2024-12-02 11:55:36,621 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:55:36,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:36,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:55:36,623 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:55:36,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 11:55:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:55:36,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 11:55:36,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:55:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:55:36,886 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 11:55:36,886 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 11:55:36,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400229776] [2024-12-02 11:55:36,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400229776] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:55:36,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:55:36,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 11:55:36,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730613283] [2024-12-02 11:55:36,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:55:36,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 11:55:36,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 11:55:36,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 11:55:36,887 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 11:55:37,091 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 133 [2024-12-02 11:55:37,092 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) [2024-12-02 11:55:37,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:55:37,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 133 [2024-12-02 11:55:37,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:55:37,513 INFO L124 PetriNetUnfolderBase]: 127/541 cut-off events. [2024-12-02 11:55:37,513 INFO L125 PetriNetUnfolderBase]: For 55/56 co-relation queries the response was YES. [2024-12-02 11:55:37,514 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. [2024-12-02 11:55:37,515 INFO L140 encePairwiseOnDemand]: 127/133 looper letters, 49 selfloop transitions, 11 changer transitions 0/117 dead transitions. [2024-12-02 11:55:37,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 117 transitions, 505 flow [2024-12-02 11:55:37,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 11:55:37,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 11:55:37,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 395 transitions. [2024-12-02 11:55:37,517 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5939849624060151 [2024-12-02 11:55:37,517 INFO L175 Difference]: Start difference. First operand has 132 places, 119 transitions, 389 flow. Second operand 5 states and 395 transitions. [2024-12-02 11:55:37,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 117 transitions, 505 flow [2024-12-02 11:55:37,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 117 transitions, 487 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 11:55:37,519 INFO L231 Difference]: Finished difference. Result has 131 places, 117 transitions, 389 flow [2024-12-02 11:55:37,519 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} [2024-12-02 11:55:37,519 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 13 predicate places. [2024-12-02 11:55:37,519 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 117 transitions, 389 flow [2024-12-02 11:55:37,519 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) [2024-12-02 11:55:37,519 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:55:37,519 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:55:37,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 11:55:37,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:37,720 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)] === [2024-12-02 11:55:37,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:55:37,720 INFO L85 PathProgramCache]: Analyzing trace with hash 368126698, now seen corresponding path program 1 times [2024-12-02 11:55:37,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 11:55:37,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27085656] [2024-12-02 11:55:37,721 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:55:37,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:37,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:55:37,722 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:55:37,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 11:55:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:55:38,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 11:55:38,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:55:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:55:38,075 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:55:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:55:38,108 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 11:55:38,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27085656] [2024-12-02 11:55:38,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27085656] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:55:38,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 11:55:38,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-12-02 11:55:38,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101173953] [2024-12-02 11:55:38,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 11:55:38,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 11:55:38,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 11:55:38,109 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 11:55:38,109 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 11:55:38,110 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2024-12-02 11:55:38,110 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) [2024-12-02 11:55:38,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:55:38,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2024-12-02 11:55:38,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:55:38,567 INFO L124 PetriNetUnfolderBase]: 127/591 cut-off events. [2024-12-02 11:55:38,567 INFO L125 PetriNetUnfolderBase]: For 150/151 co-relation queries the response was YES. [2024-12-02 11:55:38,568 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. [2024-12-02 11:55:38,569 INFO L140 encePairwiseOnDemand]: 129/133 looper letters, 63 selfloop transitions, 11 changer transitions 0/136 dead transitions. [2024-12-02 11:55:38,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 136 transitions, 665 flow [2024-12-02 11:55:38,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 11:55:38,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 11:55:38,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 519 transitions. [2024-12-02 11:55:38,570 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.650375939849624 [2024-12-02 11:55:38,571 INFO L175 Difference]: Start difference. First operand has 131 places, 117 transitions, 389 flow. Second operand 6 states and 519 transitions. [2024-12-02 11:55:38,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 136 transitions, 665 flow [2024-12-02 11:55:38,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 136 transitions, 611 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-02 11:55:38,573 INFO L231 Difference]: Finished difference. Result has 136 places, 122 transitions, 453 flow [2024-12-02 11:55:38,573 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} [2024-12-02 11:55:38,574 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 18 predicate places. [2024-12-02 11:55:38,574 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 122 transitions, 453 flow [2024-12-02 11:55:38,574 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) [2024-12-02 11:55:38,574 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:55:38,574 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:55:38,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 11:55:38,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:38,775 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)] === [2024-12-02 11:55:38,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:55:38,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1686777041, now seen corresponding path program 1 times [2024-12-02 11:55:38,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 11:55:38,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872592015] [2024-12-02 11:55:38,776 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:55:38,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:38,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:55:38,777 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:55:38,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 11:55:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:55:39,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-12-02 11:55:39,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:55:39,114 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 [2024-12-02 11:55:39,387 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 [2024-12-02 11:55:39,398 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 [2024-12-02 11:55:39,478 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2024-12-02 11:55:39,479 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 [2024-12-02 11:55:39,497 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 [2024-12-02 11:55:39,544 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 [2024-12-02 11:55:39,557 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 [2024-12-02 11:55:39,603 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 [2024-12-02 11:55:39,613 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 [2024-12-02 11:55:39,638 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 [2024-12-02 11:55:39,646 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 [2024-12-02 11:55:39,694 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 [2024-12-02 11:55:39,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:55:39,732 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:55:39,898 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 [2024-12-02 11:55:39,953 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 [2024-12-02 11:55:40,302 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:55:40,302 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 [2024-12-02 11:55:40,314 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:55:40,314 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 [2024-12-02 11:55:40,340 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:55:40,340 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 [2024-12-02 11:55:40,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:55:40,382 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 [2024-12-02 11:55:40,393 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 [2024-12-02 11:55:40,404 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 [2024-12-02 11:55:41,132 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:55:41,132 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 [2024-12-02 11:55:41,153 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:55:41,154 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 [2024-12-02 11:55:41,170 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 [2024-12-02 11:55:44,738 INFO L349 Elim1Store]: treesize reduction 10, result has 90.1 percent of original size [2024-12-02 11:55:44,739 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 [2024-12-02 11:55:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-12-02 11:55:47,549 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 11:55:47,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872592015] [2024-12-02 11:55:47,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872592015] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:55:47,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 11:55:47,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2024-12-02 11:55:47,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997956600] [2024-12-02 11:55:47,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 11:55:47,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-12-02 11:55:47,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 11:55:47,549 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-12-02 11:55:47,550 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=326, Unknown=5, NotChecked=74, Total=462 [2024-12-02 11:55:49,650 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 133 [2024-12-02 11:55:49,651 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) [2024-12-02 11:55:49,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:55:49,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 133 [2024-12-02 11:55:49,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:55:56,104 INFO L124 PetriNetUnfolderBase]: 465/1265 cut-off events. [2024-12-02 11:55:56,104 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-12-02 11:55:56,106 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. [2024-12-02 11:55:56,110 INFO L140 encePairwiseOnDemand]: 123/133 looper letters, 85 selfloop transitions, 28 changer transitions 0/133 dead transitions. [2024-12-02 11:55:56,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 133 transitions, 719 flow [2024-12-02 11:55:56,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 11:55:56,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-12-02 11:55:56,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 377 transitions. [2024-12-02 11:55:56,112 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.20247046186895812 [2024-12-02 11:55:56,112 INFO L175 Difference]: Start difference. First operand has 136 places, 122 transitions, 453 flow. Second operand 14 states and 377 transitions. [2024-12-02 11:55:56,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 133 transitions, 719 flow [2024-12-02 11:55:56,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 133 transitions, 703 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-12-02 11:55:56,115 INFO L231 Difference]: Finished difference. Result has 151 places, 129 transitions, 535 flow [2024-12-02 11:55:56,116 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} [2024-12-02 11:55:56,116 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 33 predicate places. [2024-12-02 11:55:56,116 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 129 transitions, 535 flow [2024-12-02 11:55:56,116 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) [2024-12-02 11:55:56,116 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:55:56,116 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:55:56,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-02 11:55:56,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:56,317 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)] === [2024-12-02 11:55:56,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:55:56,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1686777040, now seen corresponding path program 1 times [2024-12-02 11:55:56,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 11:55:56,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966656188] [2024-12-02 11:55:56,318 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:55:56,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:56,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:55:56,320 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:55:56,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 11:55:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:55:56,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-12-02 11:55:56,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:55:56,904 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 [2024-12-02 11:55:57,040 INFO L349 Elim1Store]: treesize reduction 90, result has 30.2 percent of original size [2024-12-02 11:55:57,040 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 [2024-12-02 11:55:57,128 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 [2024-12-02 11:55:57,207 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 [2024-12-02 11:55:57,246 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 [2024-12-02 11:55:57,307 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 [2024-12-02 11:55:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:55:57,378 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:55:57,477 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 [2024-12-02 11:55:57,798 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:55:57,799 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 [2024-12-02 11:55:57,826 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:55:57,827 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 [2024-12-02 11:55:57,837 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 [2024-12-02 11:56:08,630 INFO L349 Elim1Store]: treesize reduction 7, result has 96.7 percent of original size [2024-12-02 11:56:08,630 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 [2024-12-02 11:56:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-12-02 11:56:09,181 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 11:56:09,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966656188] [2024-12-02 11:56:09,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966656188] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:56:09,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 11:56:09,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2024-12-02 11:56:09,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194008671] [2024-12-02 11:56:09,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 11:56:09,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-12-02 11:56:09,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 11:56:09,183 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-12-02 11:56:09,183 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=246, Unknown=14, NotChecked=32, Total=342 [2024-12-02 11:56:09,785 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 133 [2024-12-02 11:56:09,785 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) [2024-12-02 11:56:09,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:56:09,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 133 [2024-12-02 11:56:09,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:56:13,464 INFO L124 PetriNetUnfolderBase]: 329/1031 cut-off events. [2024-12-02 11:56:13,464 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2024-12-02 11:56:13,468 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. [2024-12-02 11:56:13,471 INFO L140 encePairwiseOnDemand]: 125/133 looper letters, 76 selfloop transitions, 26 changer transitions 0/132 dead transitions. [2024-12-02 11:56:13,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 132 transitions, 749 flow [2024-12-02 11:56:13,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 11:56:13,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-12-02 11:56:13,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 446 transitions. [2024-12-02 11:56:13,474 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2794486215538847 [2024-12-02 11:56:13,474 INFO L175 Difference]: Start difference. First operand has 151 places, 129 transitions, 535 flow. Second operand 12 states and 446 transitions. [2024-12-02 11:56:13,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 132 transitions, 749 flow [2024-12-02 11:56:13,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 132 transitions, 716 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-12-02 11:56:13,479 INFO L231 Difference]: Finished difference. Result has 159 places, 129 transitions, 563 flow [2024-12-02 11:56:13,480 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} [2024-12-02 11:56:13,480 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 41 predicate places. [2024-12-02 11:56:13,480 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 129 transitions, 563 flow [2024-12-02 11:56:13,481 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) [2024-12-02 11:56:13,481 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:56:13,481 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:56:13,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-02 11:56:13,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:56:13,681 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)] === [2024-12-02 11:56:13,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:56:13,682 INFO L85 PathProgramCache]: Analyzing trace with hash 282754546, now seen corresponding path program 2 times [2024-12-02 11:56:13,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 11:56:13,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [64398567] [2024-12-02 11:56:13,682 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 11:56:13,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:56:13,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:56:13,684 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:56:13,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-02 11:56:14,104 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 11:56:14,104 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:56:14,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 11:56:14,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:56:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-12-02 11:56:14,296 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:56:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-12-02 11:56:14,494 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 11:56:14,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64398567] [2024-12-02 11:56:14,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64398567] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:56:14,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 11:56:14,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2024-12-02 11:56:14,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000793559] [2024-12-02 11:56:14,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 11:56:14,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 11:56:14,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 11:56:14,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 11:56:14,495 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 11:56:14,496 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2024-12-02 11:56:14,496 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) [2024-12-02 11:56:14,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:56:14,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2024-12-02 11:56:14,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:56:15,218 INFO L124 PetriNetUnfolderBase]: 129/686 cut-off events. [2024-12-02 11:56:15,218 INFO L125 PetriNetUnfolderBase]: For 399/400 co-relation queries the response was YES. [2024-12-02 11:56:15,219 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. [2024-12-02 11:56:15,221 INFO L140 encePairwiseOnDemand]: 129/133 looper letters, 95 selfloop transitions, 6 changer transitions 0/166 dead transitions. [2024-12-02 11:56:15,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 166 transitions, 1089 flow [2024-12-02 11:56:15,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 11:56:15,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 11:56:15,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 528 transitions. [2024-12-02 11:56:15,223 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6616541353383458 [2024-12-02 11:56:15,223 INFO L175 Difference]: Start difference. First operand has 159 places, 129 transitions, 563 flow. Second operand 6 states and 528 transitions. [2024-12-02 11:56:15,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 166 transitions, 1089 flow [2024-12-02 11:56:15,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 166 transitions, 973 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-12-02 11:56:15,227 INFO L231 Difference]: Finished difference. Result has 157 places, 132 transitions, 570 flow [2024-12-02 11:56:15,228 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} [2024-12-02 11:56:15,228 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 39 predicate places. [2024-12-02 11:56:15,228 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 132 transitions, 570 flow [2024-12-02 11:56:15,228 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) [2024-12-02 11:56:15,228 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:56:15,228 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2024-12-02 11:56:15,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-12-02 11:56:15,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:56:15,429 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)] === [2024-12-02 11:56:15,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:56:15,429 INFO L85 PathProgramCache]: Analyzing trace with hash 282754596, now seen corresponding path program 1 times [2024-12-02 11:56:15,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 11:56:15,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090968644] [2024-12-02 11:56:15,430 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:56:15,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:56:15,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:56:15,432 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:56:15,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-02 11:56:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:56:15,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 11:56:15,835 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:56:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:56:16,026 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:56:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:56:16,314 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 11:56:16,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090968644] [2024-12-02 11:56:16,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090968644] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:56:16,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 11:56:16,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-12-02 11:56:16,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834465093] [2024-12-02 11:56:16,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 11:56:16,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 11:56:16,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 11:56:16,316 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 11:56:16,316 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-12-02 11:56:16,316 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2024-12-02 11:56:16,317 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) [2024-12-02 11:56:16,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:56:16,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2024-12-02 11:56:16,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:56:18,061 INFO L124 PetriNetUnfolderBase]: 129/938 cut-off events. [2024-12-02 11:56:18,061 INFO L125 PetriNetUnfolderBase]: For 846/847 co-relation queries the response was YES. [2024-12-02 11:56:18,062 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. [2024-12-02 11:56:18,064 INFO L140 encePairwiseOnDemand]: 129/133 looper letters, 96 selfloop transitions, 23 changer transitions 0/184 dead transitions. [2024-12-02 11:56:18,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 184 transitions, 1188 flow [2024-12-02 11:56:18,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 11:56:18,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-12-02 11:56:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1008 transitions. [2024-12-02 11:56:18,067 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.631578947368421 [2024-12-02 11:56:18,067 INFO L175 Difference]: Start difference. First operand has 157 places, 132 transitions, 570 flow. Second operand 12 states and 1008 transitions. [2024-12-02 11:56:18,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 184 transitions, 1188 flow [2024-12-02 11:56:18,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 184 transitions, 1178 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-12-02 11:56:18,072 INFO L231 Difference]: Finished difference. Result has 174 places, 145 transitions, 837 flow [2024-12-02 11:56:18,072 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} [2024-12-02 11:56:18,072 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 56 predicate places. [2024-12-02 11:56:18,072 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 145 transitions, 837 flow [2024-12-02 11:56:18,073 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) [2024-12-02 11:56:18,073 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:56:18,073 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2024-12-02 11:56:18,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-02 11:56:18,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:56:18,274 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)] === [2024-12-02 11:56:18,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:56:18,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1934802140, now seen corresponding path program 2 times [2024-12-02 11:56:18,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 11:56:18,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395477551] [2024-12-02 11:56:18,275 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 11:56:18,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:56:18,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:56:18,277 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:56:18,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-02 11:56:19,052 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 11:56:19,052 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:56:19,099 INFO L256 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 11:56:19,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:56:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 2 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:56:19,640 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:56:20,626 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 2 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:56:20,626 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 11:56:20,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395477551] [2024-12-02 11:56:20,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395477551] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:56:20,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 11:56:20,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-12-02 11:56:20,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495782638] [2024-12-02 11:56:20,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 11:56:20,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-12-02 11:56:20,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 11:56:20,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-12-02 11:56:20,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2024-12-02 11:56:20,640 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 133 [2024-12-02 11:56:20,642 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) [2024-12-02 11:56:20,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 11:56:20,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 133 [2024-12-02 11:56:20,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 11:56:25,869 INFO L124 PetriNetUnfolderBase]: 129/1442 cut-off events. [2024-12-02 11:56:25,869 INFO L125 PetriNetUnfolderBase]: For 3842/3843 co-relation queries the response was YES. [2024-12-02 11:56:25,871 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. [2024-12-02 11:56:25,874 INFO L140 encePairwiseOnDemand]: 129/133 looper letters, 156 selfloop transitions, 47 changer transitions 0/268 dead transitions. [2024-12-02 11:56:25,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 268 transitions, 2274 flow [2024-12-02 11:56:25,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-12-02 11:56:25,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-12-02 11:56:25,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1986 transitions. [2024-12-02 11:56:25,877 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6221804511278195 [2024-12-02 11:56:25,877 INFO L175 Difference]: Start difference. First operand has 174 places, 145 transitions, 837 flow. Second operand 24 states and 1986 transitions. [2024-12-02 11:56:25,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 268 transitions, 2274 flow [2024-12-02 11:56:25,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 268 transitions, 2262 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 11:56:25,889 INFO L231 Difference]: Finished difference. Result has 207 places, 170 transitions, 1466 flow [2024-12-02 11:56:25,889 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} [2024-12-02 11:56:25,889 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, 89 predicate places. [2024-12-02 11:56:25,890 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 170 transitions, 1466 flow [2024-12-02 11:56:25,890 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) [2024-12-02 11:56:25,890 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 11:56:25,890 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 2, 1, 1, 1, 1, 1] [2024-12-02 11:56:25,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-12-02 11:56:26,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:56:26,091 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)] === [2024-12-02 11:56:26,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:56:26,092 INFO L85 PathProgramCache]: Analyzing trace with hash -26112732, now seen corresponding path program 3 times [2024-12-02 11:56:26,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 11:56:26,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161131792] [2024-12-02 11:56:26,093 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 11:56:26,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:56:26,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:56:26,095 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:56:26,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c7e047d-ba29-4a7f-837b-e6ec06b08fbe/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process