./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:07:16,480 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:07:16,636 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 23:07:16,644 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:07:16,645 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:07:16,685 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:07:16,687 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:07:16,687 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:07:16,689 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:07:16,694 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:07:16,695 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:07:16,696 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:07:16,697 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:07:16,698 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:07:16,699 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:07:16,699 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:07:16,700 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:07:16,701 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:07:16,701 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 23:07:16,702 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 23:07:16,702 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 23:07:16,703 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:07:16,703 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 23:07:16,704 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 23:07:16,704 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:07:16,705 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:07:16,706 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:07:16,706 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:07:16,707 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:07:16,707 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:07:16,709 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:07:16,709 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:07:16,710 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:07:16,710 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:07:16,710 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:07:16,711 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:07:16,711 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:07:16,711 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:07:16,712 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da [2023-11-06 23:07:17,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:07:17,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:07:17,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:07:17,096 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:07:17,097 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:07:17,098 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2023-11-06 23:07:20,146 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:07:20,513 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:07:20,514 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2023-11-06 23:07:20,531 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/data/fa5ba5f9f/08c50e16fcac4f32855395e6ebbdd260/FLAG7499ae9a4 [2023-11-06 23:07:20,551 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/data/fa5ba5f9f/08c50e16fcac4f32855395e6ebbdd260 [2023-11-06 23:07:20,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:07:20,559 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:07:20,563 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:07:20,563 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:07:20,568 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:07:20,569 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:07:20" (1/1) ... [2023-11-06 23:07:20,570 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76066ed0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:20, skipping insertion in model container [2023-11-06 23:07:20,570 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:07:20" (1/1) ... [2023-11-06 23:07:20,606 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:07:20,835 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:07:20,852 ERROR L324 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) [2023-11-06 23:07:20,853 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@a4fc24b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:20, skipping insertion in model container [2023-11-06 23:07:20,853 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:07:20,854 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 23:07:20,856 INFO L158 Benchmark]: Toolchain (without parser) took 295.58ms. Allocated memory is still 151.0MB. Free memory was 120.8MB in the beginning and 111.4MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-06 23:07:20,857 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 151.0MB. Free memory is still 110.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 23:07:20,858 INFO L158 Benchmark]: CACSL2BoogieTranslator took 291.32ms. Allocated memory is still 151.0MB. Free memory was 120.8MB in the beginning and 111.4MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-06 23:07:20,860 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 151.0MB. Free memory is still 110.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 291.32ms. Allocated memory is still 151.0MB. Free memory was 120.8MB in the beginning and 111.4MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: 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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:07:23,390 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:07:23,526 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-06 23:07:23,535 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:07:23,539 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:07:23,585 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:07:23,586 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:07:23,586 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:07:23,587 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:07:23,593 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:07:23,593 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:07:23,594 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:07:23,594 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:07:23,596 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:07:23,597 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:07:23,597 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:07:23,597 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:07:23,598 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:07:23,598 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 23:07:23,599 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 23:07:23,599 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 23:07:23,600 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:07:23,600 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 23:07:23,600 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 23:07:23,601 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 23:07:23,601 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 23:07:23,602 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:07:23,602 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:07:23,603 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:07:23,604 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:07:23,605 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:07:23,605 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:07:23,606 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:07:23,606 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:07:23,606 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 23:07:23,607 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 23:07:23,607 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:07:23,607 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:07:23,607 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:07:23,608 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 23:07:23,609 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:07:23,609 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b78a1de0122078b80177387d59eedcdf8d73ccef913955b4bda0200e53e1d3da [2023-11-06 23:07:24,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:07:24,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:07:24,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:07:24,098 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:07:24,099 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:07:24,100 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2023-11-06 23:07:27,406 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:07:27,720 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:07:27,722 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2023-11-06 23:07:27,737 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/data/43d18acd8/ee0b48d229724139ad54d6d2822ae52c/FLAG0b7e58084 [2023-11-06 23:07:27,757 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/data/43d18acd8/ee0b48d229724139ad54d6d2822ae52c [2023-11-06 23:07:27,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:07:27,765 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:07:27,769 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:07:27,769 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:07:27,774 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:07:27,775 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:07:27" (1/1) ... [2023-11-06 23:07:27,777 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71ac1fb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:27, skipping insertion in model container [2023-11-06 23:07:27,777 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:07:27" (1/1) ... [2023-11-06 23:07:27,810 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:07:28,075 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:07:28,094 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 23:07:28,099 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:07:28,122 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:07:28,133 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:07:28,171 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:07:28,190 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:07:28,191 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:28 WrapperNode [2023-11-06 23:07:28,191 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:07:28,192 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:07:28,192 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:07:28,193 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:07:28,200 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:28" (1/1) ... [2023-11-06 23:07:28,213 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:28" (1/1) ... [2023-11-06 23:07:28,245 INFO L138 Inliner]: procedures = 27, calls = 40, calls flagged for inlining = 14, calls inlined = 18, statements flattened = 199 [2023-11-06 23:07:28,246 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:07:28,247 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:07:28,247 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:07:28,247 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:07:28,258 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:28" (1/1) ... [2023-11-06 23:07:28,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:28" (1/1) ... [2023-11-06 23:07:28,266 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:28" (1/1) ... [2023-11-06 23:07:28,266 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:28" (1/1) ... [2023-11-06 23:07:28,291 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:28" (1/1) ... [2023-11-06 23:07:28,295 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:28" (1/1) ... [2023-11-06 23:07:28,298 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:28" (1/1) ... [2023-11-06 23:07:28,300 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:28" (1/1) ... [2023-11-06 23:07:28,305 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:07:28,306 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:07:28,306 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:07:28,306 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:07:28,307 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:28" (1/1) ... [2023-11-06 23:07:28,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:07:28,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:07:28,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:07:28,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:07:28,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:07:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 23:07:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:07:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 23:07:28,390 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 23:07:28,390 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 23:07:28,391 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 23:07:28,391 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 23:07:28,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 23:07:28,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:07:28,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:07:28,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:07:28,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 23:07:28,405 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 23:07:28,583 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:07:28,585 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:07:29,379 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:07:29,402 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:07:29,403 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 23:07:29,406 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:07:29 BoogieIcfgContainer [2023-11-06 23:07:29,407 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:07:29,443 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:07:29,443 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:07:29,447 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:07:29,447 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:07:27" (1/3) ... [2023-11-06 23:07:29,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@451f5eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:07:29, skipping insertion in model container [2023-11-06 23:07:29,448 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:07:28" (2/3) ... [2023-11-06 23:07:29,451 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@451f5eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:07:29, skipping insertion in model container [2023-11-06 23:07:29,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:07:29" (3/3) ... [2023-11-06 23:07:29,453 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2023-11-06 23:07:29,474 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:07:29,475 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-11-06 23:07:29,476 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:07:29,678 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 23:07:29,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 275 places, 289 transitions, 592 flow [2023-11-06 23:07:29,940 INFO L124 PetriNetUnfolderBase]: 21/287 cut-off events. [2023-11-06 23:07:29,940 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:07:29,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 287 events. 21/287 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 519 event pairs, 0 based on Foata normal form. 0/236 useless extension candidates. Maximal degree in co-relation 179. Up to 3 conditions per place. [2023-11-06 23:07:29,956 INFO L82 GeneralOperation]: Start removeDead. Operand has 275 places, 289 transitions, 592 flow [2023-11-06 23:07:29,964 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 268 places, 282 transitions, 576 flow [2023-11-06 23:07:29,972 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:07:29,989 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 268 places, 282 transitions, 576 flow [2023-11-06 23:07:29,994 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 268 places, 282 transitions, 576 flow [2023-11-06 23:07:29,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 282 transitions, 576 flow [2023-11-06 23:07:30,081 INFO L124 PetriNetUnfolderBase]: 21/282 cut-off events. [2023-11-06 23:07:30,081 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 23:07:30,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 282 events. 21/282 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 514 event pairs, 0 based on Foata normal form. 0/232 useless extension candidates. Maximal degree in co-relation 179. Up to 3 conditions per place. [2023-11-06 23:07:30,095 INFO L119 LiptonReduction]: Number of co-enabled transitions 9120 [2023-11-06 23:08:08,506 INFO L134 LiptonReduction]: Checked pairs total: 12343 [2023-11-06 23:08:08,507 INFO L136 LiptonReduction]: Total number of compositions: 340 [2023-11-06 23:08:08,522 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:08:08,529 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@14a41ef2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:08:08,529 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2023-11-06 23:08:08,541 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:08:08,542 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 23:08:08,542 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 23:08:08,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:08,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:08:08,544 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:08:08,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:08,549 INFO L85 PathProgramCache]: Analyzing trace with hash 36856, now seen corresponding path program 1 times [2023-11-06 23:08:08,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:08,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960098647] [2023-11-06 23:08:08,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:08,563 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:08,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:08,569 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:08:08,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-06 23:08:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:08,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:08:08,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:08,762 INFO L351 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 [2023-11-06 23:08:08,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:08,788 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:08:08,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:08,803 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:08:08,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:08,811 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:08:08,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:08,830 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:08:08,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:08,850 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:08:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:08,857 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:08:08,858 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:08,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960098647] [2023-11-06 23:08:08,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960098647] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:08,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:08,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:08:08,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828675415] [2023-11-06 23:08:08,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:08,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:08:08,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:08,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:08:08,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:08:09,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 629 [2023-11-06 23:08:09,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 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) [2023-11-06 23:08:09,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:09,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 629 [2023-11-06 23:08:09,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:09,868 INFO L124 PetriNetUnfolderBase]: 805/1290 cut-off events. [2023-11-06 23:08:09,868 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-06 23:08:09,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2622 conditions, 1290 events. 805/1290 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 6097 event pairs, 679 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 2472. Up to 1285 conditions per place. [2023-11-06 23:08:09,882 INFO L140 encePairwiseOnDemand]: 618/629 looper letters, 41 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2023-11-06 23:08:09,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 45 transitions, 192 flow [2023-11-06 23:08:09,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:09,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:08:09,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 823 transitions. [2023-11-06 23:08:09,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43614202437731847 [2023-11-06 23:08:09,908 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 823 transitions. [2023-11-06 23:08:09,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 823 transitions. [2023-11-06 23:08:09,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:09,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 823 transitions. [2023-11-06 23:08:09,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 274.3333333333333) internal successors, (823), 3 states have internal predecessors, (823), 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) [2023-11-06 23:08:09,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 629.0) internal successors, (2516), 4 states have internal predecessors, (2516), 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) [2023-11-06 23:08:09,936 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 629.0) internal successors, (2516), 4 states have internal predecessors, (2516), 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) [2023-11-06 23:08:09,938 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 116 flow. Second operand 3 states and 823 transitions. [2023-11-06 23:08:09,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 45 transitions, 192 flow [2023-11-06 23:08:09,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 184 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 23:08:09,947 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 102 flow [2023-11-06 23:08:09,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-11-06 23:08:09,953 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2023-11-06 23:08:09,953 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 102 flow [2023-11-06 23:08:09,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 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) [2023-11-06 23:08:09,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:09,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 23:08:09,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-06 23:08:10,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:10,167 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:08:10,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:10,167 INFO L85 PathProgramCache]: Analyzing trace with hash 36857, now seen corresponding path program 1 times [2023-11-06 23:08:10,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:10,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036231166] [2023-11-06 23:08:10,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:10,168 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:10,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:10,175 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:08:10,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-06 23:08:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:10,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:08:10,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:10,272 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 23:08:10,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:10,288 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:08:10,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:10,321 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:08:10,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:10,339 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:08:10,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:10,363 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:08:10,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:10,379 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:08:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:10,402 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:08:10,403 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:10,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036231166] [2023-11-06 23:08:10,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036231166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:10,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:10,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:08:10,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141576820] [2023-11-06 23:08:10,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:10,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:08:10,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:10,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:08:10,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:08:10,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 629 [2023-11-06 23:08:10,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 255.66666666666666) internal successors, (767), 3 states have internal predecessors, (767), 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) [2023-11-06 23:08:10,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:10,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 629 [2023-11-06 23:08:10,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:11,463 INFO L124 PetriNetUnfolderBase]: 809/1296 cut-off events. [2023-11-06 23:08:11,464 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 23:08:11,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2617 conditions, 1296 events. 809/1296 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 6142 event pairs, 679 based on Foata normal form. 0/430 useless extension candidates. Maximal degree in co-relation 2577. Up to 1294 conditions per place. [2023-11-06 23:08:11,474 INFO L140 encePairwiseOnDemand]: 620/629 looper letters, 44 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2023-11-06 23:08:11,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 51 transitions, 222 flow [2023-11-06 23:08:11,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:11,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:08:11,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 818 transitions. [2023-11-06 23:08:11,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43349231584525705 [2023-11-06 23:08:11,479 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 818 transitions. [2023-11-06 23:08:11,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 818 transitions. [2023-11-06 23:08:11,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:11,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 818 transitions. [2023-11-06 23:08:11,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 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) [2023-11-06 23:08:11,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 629.0) internal successors, (2516), 4 states have internal predecessors, (2516), 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) [2023-11-06 23:08:11,490 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 629.0) internal successors, (2516), 4 states have internal predecessors, (2516), 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) [2023-11-06 23:08:11,491 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 102 flow. Second operand 3 states and 818 transitions. [2023-11-06 23:08:11,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 51 transitions, 222 flow [2023-11-06 23:08:11,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 51 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:08:11,494 INFO L231 Difference]: Finished difference. Result has 47 places, 51 transitions, 150 flow [2023-11-06 23:08:11,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=47, PETRI_TRANSITIONS=51} [2023-11-06 23:08:11,495 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -7 predicate places. [2023-11-06 23:08:11,495 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 51 transitions, 150 flow [2023-11-06 23:08:11,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.66666666666666) internal successors, (767), 3 states have internal predecessors, (767), 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) [2023-11-06 23:08:11,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:11,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 23:08:11,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:11,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:11,709 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:08:11,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:11,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1145789, now seen corresponding path program 1 times [2023-11-06 23:08:11,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:11,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713528207] [2023-11-06 23:08:11,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:11,717 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:11,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:11,718 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:08:11,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-06 23:08:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:11,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:08:11,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:11,822 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 23:08:11,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:11,836 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:08:11,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:11,851 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:08:11,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:11,860 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:08:11,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:11,887 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:08:11,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:11,901 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:08:11,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:11,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:12,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:12,199 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:12,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713528207] [2023-11-06 23:08:12,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713528207] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:12,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:08:12,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 23:08:12,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799454516] [2023-11-06 23:08:12,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:12,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:08:12,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:12,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:08:12,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:08:14,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 629 [2023-11-06 23:08:14,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 51 transitions, 150 flow. Second operand has 6 states, 6 states have (on average 246.0) internal successors, (1476), 6 states have internal predecessors, (1476), 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) [2023-11-06 23:08:14,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:14,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 629 [2023-11-06 23:08:14,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:16,364 INFO L124 PetriNetUnfolderBase]: 821/1314 cut-off events. [2023-11-06 23:08:16,364 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 23:08:16,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2690 conditions, 1314 events. 821/1314 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 6200 event pairs, 679 based on Foata normal form. 0/439 useless extension candidates. Maximal degree in co-relation 2577. Up to 1303 conditions per place. [2023-11-06 23:08:16,374 INFO L140 encePairwiseOnDemand]: 620/629 looper letters, 44 selfloop transitions, 25 changer transitions 0/69 dead transitions. [2023-11-06 23:08:16,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 69 transitions, 366 flow [2023-11-06 23:08:16,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:08:16,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:08:16,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1545 transitions. [2023-11-06 23:08:16,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4093799682034976 [2023-11-06 23:08:16,381 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1545 transitions. [2023-11-06 23:08:16,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1545 transitions. [2023-11-06 23:08:16,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:16,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1545 transitions. [2023-11-06 23:08:16,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 257.5) internal successors, (1545), 6 states have internal predecessors, (1545), 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) [2023-11-06 23:08:16,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 629.0) internal successors, (4403), 7 states have internal predecessors, (4403), 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) [2023-11-06 23:08:16,400 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 629.0) internal successors, (4403), 7 states have internal predecessors, (4403), 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) [2023-11-06 23:08:16,400 INFO L175 Difference]: Start difference. First operand has 47 places, 51 transitions, 150 flow. Second operand 6 states and 1545 transitions. [2023-11-06 23:08:16,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 69 transitions, 366 flow [2023-11-06 23:08:16,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 69 transitions, 346 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:08:16,404 INFO L231 Difference]: Finished difference. Result has 53 places, 69 transitions, 304 flow [2023-11-06 23:08:16,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=304, PETRI_PLACES=53, PETRI_TRANSITIONS=69} [2023-11-06 23:08:16,405 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2023-11-06 23:08:16,405 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 69 transitions, 304 flow [2023-11-06 23:08:16,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 246.0) internal successors, (1476), 6 states have internal predecessors, (1476), 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) [2023-11-06 23:08:16,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:16,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 23:08:16,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-06 23:08:16,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:16,618 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:08:16,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:16,618 INFO L85 PathProgramCache]: Analyzing trace with hash 35571537, now seen corresponding path program 1 times [2023-11-06 23:08:16,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:16,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846122167] [2023-11-06 23:08:16,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:16,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:16,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:16,620 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:08:16,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-06 23:08:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:16,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:08:16,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:16,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:16,781 INFO L322 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-06 23:08:16,782 INFO L351 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 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-06 23:08:16,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:16,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:16,822 INFO L351 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 17 treesize of output 11 [2023-11-06 23:08:16,886 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:08:16,886 INFO L351 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 20 [2023-11-06 23:08:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:08:16,922 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:08:16,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:16,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846122167] [2023-11-06 23:08:16,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846122167] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:16,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:16,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:08:16,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309598410] [2023-11-06 23:08:16,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:16,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:08:16,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:16,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:08:16,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:08:17,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 629 [2023-11-06 23:08:17,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 69 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 262.3333333333333) internal successors, (787), 3 states have internal predecessors, (787), 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) [2023-11-06 23:08:17,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:17,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 629 [2023-11-06 23:08:17,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:17,749 INFO L124 PetriNetUnfolderBase]: 614/1008 cut-off events. [2023-11-06 23:08:17,749 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-11-06 23:08:17,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2112 conditions, 1008 events. 614/1008 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 4565 event pairs, 504 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 2038. Up to 1008 conditions per place. [2023-11-06 23:08:17,756 INFO L140 encePairwiseOnDemand]: 626/629 looper letters, 62 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2023-11-06 23:08:17,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 63 transitions, 395 flow [2023-11-06 23:08:17,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:17,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:08:17,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 828 transitions. [2023-11-06 23:08:17,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43879173290937995 [2023-11-06 23:08:17,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 828 transitions. [2023-11-06 23:08:17,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 828 transitions. [2023-11-06 23:08:17,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:17,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 828 transitions. [2023-11-06 23:08:17,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 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) [2023-11-06 23:08:17,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 629.0) internal successors, (2516), 4 states have internal predecessors, (2516), 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) [2023-11-06 23:08:17,771 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 629.0) internal successors, (2516), 4 states have internal predecessors, (2516), 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) [2023-11-06 23:08:17,771 INFO L175 Difference]: Start difference. First operand has 53 places, 69 transitions, 304 flow. Second operand 3 states and 828 transitions. [2023-11-06 23:08:17,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 63 transitions, 395 flow [2023-11-06 23:08:17,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 63 transitions, 362 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:17,775 INFO L231 Difference]: Finished difference. Result has 52 places, 63 transitions, 238 flow [2023-11-06 23:08:17,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=52, PETRI_TRANSITIONS=63} [2023-11-06 23:08:17,777 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2023-11-06 23:08:17,777 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 63 transitions, 238 flow [2023-11-06 23:08:17,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 262.3333333333333) internal successors, (787), 3 states have internal predecessors, (787), 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) [2023-11-06 23:08:17,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:17,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 23:08:17,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-06 23:08:17,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:17,989 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:08:17,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:17,989 INFO L85 PathProgramCache]: Analyzing trace with hash 35571538, now seen corresponding path program 1 times [2023-11-06 23:08:17,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:17,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225601844] [2023-11-06 23:08:17,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:17,990 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:17,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:17,991 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:08:17,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-06 23:08:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:18,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:08:18,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:18,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:18,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:18,149 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 23:08:18,161 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2023-11-06 23:08:18,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:18,185 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 23:08:18,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:18,203 INFO L351 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 5 treesize of output 3 [2023-11-06 23:08:18,281 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 23:08:18,282 INFO L351 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 [2023-11-06 23:08:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:18,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:18,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:18,760 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:18,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225601844] [2023-11-06 23:08:18,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225601844] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:08:18,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:08:18,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2023-11-06 23:08:18,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375502553] [2023-11-06 23:08:18,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:18,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:08:18,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:18,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:08:18,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:08:20,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 629 [2023-11-06 23:08:20,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 63 transitions, 238 flow. Second operand has 5 states, 5 states have (on average 244.8) internal successors, (1224), 5 states have internal predecessors, (1224), 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) [2023-11-06 23:08:20,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:20,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 629 [2023-11-06 23:08:20,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:21,498 INFO L124 PetriNetUnfolderBase]: 407/703 cut-off events. [2023-11-06 23:08:21,499 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-06 23:08:21,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1479 conditions, 703 events. 407/703 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3069 event pairs, 329 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 1467. Up to 690 conditions per place. [2023-11-06 23:08:21,506 INFO L140 encePairwiseOnDemand]: 623/629 looper letters, 49 selfloop transitions, 9 changer transitions 0/58 dead transitions. [2023-11-06 23:08:21,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 58 transitions, 331 flow [2023-11-06 23:08:21,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:08:21,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:08:21,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1266 transitions. [2023-11-06 23:08:21,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.402543720190779 [2023-11-06 23:08:21,520 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1266 transitions. [2023-11-06 23:08:21,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1266 transitions. [2023-11-06 23:08:21,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:21,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1266 transitions. [2023-11-06 23:08:21,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 253.2) internal successors, (1266), 5 states have internal predecessors, (1266), 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) [2023-11-06 23:08:21,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 629.0) internal successors, (3774), 6 states have internal predecessors, (3774), 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) [2023-11-06 23:08:21,540 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 629.0) internal successors, (3774), 6 states have internal predecessors, (3774), 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) [2023-11-06 23:08:21,540 INFO L175 Difference]: Start difference. First operand has 52 places, 63 transitions, 238 flow. Second operand 5 states and 1266 transitions. [2023-11-06 23:08:21,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 58 transitions, 331 flow [2023-11-06 23:08:21,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 58 transitions, 330 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:21,547 INFO L231 Difference]: Finished difference. Result has 54 places, 58 transitions, 232 flow [2023-11-06 23:08:21,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=232, PETRI_PLACES=54, PETRI_TRANSITIONS=58} [2023-11-06 23:08:21,551 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2023-11-06 23:08:21,551 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 58 transitions, 232 flow [2023-11-06 23:08:21,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 244.8) internal successors, (1224), 5 states have internal predecessors, (1224), 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) [2023-11-06 23:08:21,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:21,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 23:08:21,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:21,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:21,757 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:08:21,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:21,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1147433, now seen corresponding path program 1 times [2023-11-06 23:08:21,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:21,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069057613] [2023-11-06 23:08:21,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:21,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:21,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:21,760 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:08:21,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-06 23:08:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:21,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:08:21,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:21,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:21,900 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 23:08:21,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:21,915 INFO L351 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 5 treesize of output 3 [2023-11-06 23:08:21,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:21,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:21,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:21,961 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:08:21,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:21,999 INFO L351 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 [2023-11-06 23:08:22,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:22,034 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:08:22,035 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:22,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069057613] [2023-11-06 23:08:22,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069057613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:22,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:22,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:08:22,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159057373] [2023-11-06 23:08:22,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:22,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:08:22,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:22,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:08:22,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:08:22,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 629 [2023-11-06 23:08:22,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 58 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 261.75) internal successors, (1047), 4 states have internal predecessors, (1047), 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) [2023-11-06 23:08:22,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:22,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 629 [2023-11-06 23:08:22,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:23,064 INFO L124 PetriNetUnfolderBase]: 407/702 cut-off events. [2023-11-06 23:08:23,064 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-06 23:08:23,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1483 conditions, 702 events. 407/702 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3075 event pairs, 329 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 1470. Up to 702 conditions per place. [2023-11-06 23:08:23,070 INFO L140 encePairwiseOnDemand]: 627/629 looper letters, 56 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-11-06 23:08:23,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 57 transitions, 339 flow [2023-11-06 23:08:23,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:23,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:08:23,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 825 transitions. [2023-11-06 23:08:23,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43720190779014306 [2023-11-06 23:08:23,075 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 825 transitions. [2023-11-06 23:08:23,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 825 transitions. [2023-11-06 23:08:23,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:23,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 825 transitions. [2023-11-06 23:08:23,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 275.0) internal successors, (825), 3 states have internal predecessors, (825), 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) [2023-11-06 23:08:23,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 629.0) internal successors, (2516), 4 states have internal predecessors, (2516), 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) [2023-11-06 23:08:23,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 629.0) internal successors, (2516), 4 states have internal predecessors, (2516), 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) [2023-11-06 23:08:23,085 INFO L175 Difference]: Start difference. First operand has 54 places, 58 transitions, 232 flow. Second operand 3 states and 825 transitions. [2023-11-06 23:08:23,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 57 transitions, 339 flow [2023-11-06 23:08:23,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 57 transitions, 330 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-06 23:08:23,089 INFO L231 Difference]: Finished difference. Result has 53 places, 57 transitions, 218 flow [2023-11-06 23:08:23,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=53, PETRI_TRANSITIONS=57} [2023-11-06 23:08:23,090 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2023-11-06 23:08:23,090 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 57 transitions, 218 flow [2023-11-06 23:08:23,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 261.75) internal successors, (1047), 4 states have internal predecessors, (1047), 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) [2023-11-06 23:08:23,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:23,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:08:23,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:23,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:23,302 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:08:23,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:23,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1102706467, now seen corresponding path program 1 times [2023-11-06 23:08:23,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:23,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858493992] [2023-11-06 23:08:23,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:23,302 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:23,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:23,304 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:08:23,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-06 23:08:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:23,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:08:23,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:23,409 INFO L322 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-06 23:08:23,409 INFO L351 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 21 treesize of output 15 [2023-11-06 23:08:23,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:23,433 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:08:23,434 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 23:08:23,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:23,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:23,466 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 23:08:23,466 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-06 23:08:23,497 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:08:23,498 INFO L351 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 20 [2023-11-06 23:08:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:23,517 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:08:23,517 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:23,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858493992] [2023-11-06 23:08:23,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858493992] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:23,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:23,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:08:23,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486504808] [2023-11-06 23:08:23,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:23,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:08:23,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:23,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:08:23,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:08:23,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 629 [2023-11-06 23:08:23,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 57 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 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) [2023-11-06 23:08:23,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:23,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 629 [2023-11-06 23:08:23,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:24,188 INFO L124 PetriNetUnfolderBase]: 385/659 cut-off events. [2023-11-06 23:08:24,188 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-06 23:08:24,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1396 conditions, 659 events. 385/659 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 2831 event pairs, 310 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 1383. Up to 659 conditions per place. [2023-11-06 23:08:24,194 INFO L140 encePairwiseOnDemand]: 626/629 looper letters, 54 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-11-06 23:08:24,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 55 transitions, 324 flow [2023-11-06 23:08:24,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:24,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:08:24,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 818 transitions. [2023-11-06 23:08:24,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43349231584525705 [2023-11-06 23:08:24,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 818 transitions. [2023-11-06 23:08:24,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 818 transitions. [2023-11-06 23:08:24,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:24,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 818 transitions. [2023-11-06 23:08:24,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.6666666666667) internal successors, (818), 3 states have internal predecessors, (818), 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) [2023-11-06 23:08:24,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 629.0) internal successors, (2516), 4 states have internal predecessors, (2516), 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) [2023-11-06 23:08:24,210 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 629.0) internal successors, (2516), 4 states have internal predecessors, (2516), 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) [2023-11-06 23:08:24,210 INFO L175 Difference]: Start difference. First operand has 53 places, 57 transitions, 218 flow. Second operand 3 states and 818 transitions. [2023-11-06 23:08:24,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 55 transitions, 324 flow [2023-11-06 23:08:24,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 323 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:24,216 INFO L231 Difference]: Finished difference. Result has 52 places, 55 transitions, 215 flow [2023-11-06 23:08:24,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=52, PETRI_TRANSITIONS=55} [2023-11-06 23:08:24,218 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -2 predicate places. [2023-11-06 23:08:24,219 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 55 transitions, 215 flow [2023-11-06 23:08:24,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 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) [2023-11-06 23:08:24,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:24,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 23:08:24,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:24,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:24,440 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:08:24,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:24,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1102706469, now seen corresponding path program 1 times [2023-11-06 23:08:24,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:24,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17595741] [2023-11-06 23:08:24,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:24,441 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:24,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:24,443 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:08:24,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-06 23:08:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:24,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:08:24,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:24,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:24,597 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 23:08:24,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:24,615 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2023-11-06 23:08:24,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:24,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:24,648 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:08:24,655 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:08:24,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:24,693 INFO L351 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 [2023-11-06 23:08:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:24,756 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:08:24,756 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:24,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17595741] [2023-11-06 23:08:24,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17595741] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:24,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:24,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:08:24,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193730253] [2023-11-06 23:08:24,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:24,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:08:24,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:24,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:08:24,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:08:25,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 629 [2023-11-06 23:08:25,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 55 transitions, 215 flow. Second operand has 4 states, 4 states have (on average 260.25) internal successors, (1041), 4 states have internal predecessors, (1041), 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) [2023-11-06 23:08:25,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:25,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 629 [2023-11-06 23:08:25,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:25,719 INFO L124 PetriNetUnfolderBase]: 363/616 cut-off events. [2023-11-06 23:08:25,719 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-06 23:08:25,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1311 conditions, 616 events. 363/616 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 2602 event pairs, 291 based on Foata normal form. 0/303 useless extension candidates. Maximal degree in co-relation 1297. Up to 616 conditions per place. [2023-11-06 23:08:25,725 INFO L140 encePairwiseOnDemand]: 626/629 looper letters, 52 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-11-06 23:08:25,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 53 transitions, 317 flow [2023-11-06 23:08:25,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:25,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:08:25,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 816 transitions. [2023-11-06 23:08:25,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2023-11-06 23:08:25,731 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 816 transitions. [2023-11-06 23:08:25,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 816 transitions. [2023-11-06 23:08:25,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:25,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 816 transitions. [2023-11-06 23:08:25,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.0) internal successors, (816), 3 states have internal predecessors, (816), 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) [2023-11-06 23:08:25,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 629.0) internal successors, (2516), 4 states have internal predecessors, (2516), 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) [2023-11-06 23:08:25,741 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 629.0) internal successors, (2516), 4 states have internal predecessors, (2516), 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) [2023-11-06 23:08:25,741 INFO L175 Difference]: Start difference. First operand has 52 places, 55 transitions, 215 flow. Second operand 3 states and 816 transitions. [2023-11-06 23:08:25,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 53 transitions, 317 flow [2023-11-06 23:08:25,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 53 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:25,744 INFO L231 Difference]: Finished difference. Result has 51 places, 53 transitions, 212 flow [2023-11-06 23:08:25,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=51, PETRI_TRANSITIONS=53} [2023-11-06 23:08:25,745 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -3 predicate places. [2023-11-06 23:08:25,745 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 53 transitions, 212 flow [2023-11-06 23:08:25,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 260.25) internal successors, (1041), 4 states have internal predecessors, (1041), 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) [2023-11-06 23:08:25,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:25,746 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 23:08:25,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:25,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:25,959 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:08:25,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:25,965 INFO L85 PathProgramCache]: Analyzing trace with hash -222338823, now seen corresponding path program 2 times [2023-11-06 23:08:25,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:25,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991107480] [2023-11-06 23:08:25,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:08:25,967 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:25,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:25,968 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:08:25,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-06 23:08:26,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:08:26,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:08:26,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:08:26,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:26,119 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 23:08:26,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:26,132 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:08:26,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:26,167 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:08:26,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:26,183 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:08:26,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:26,201 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:08:26,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:26,211 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:08:26,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:26,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:27,171 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:27,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991107480] [2023-11-06 23:08:27,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991107480] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:27,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:08:27,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 23:08:27,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206139694] [2023-11-06 23:08:27,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:27,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:08:27,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:27,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:08:27,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:08:34,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 629 [2023-11-06 23:08:34,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 53 transitions, 212 flow. Second operand has 12 states, 12 states have (on average 248.0) internal successors, (2976), 12 states have internal predecessors, (2976), 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) [2023-11-06 23:08:34,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:34,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 629 [2023-11-06 23:08:34,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:39,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:08:41,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:08:42,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:08:44,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:08:46,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:08:48,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 23:08:49,271 INFO L124 PetriNetUnfolderBase]: 374/638 cut-off events. [2023-11-06 23:08:49,271 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-11-06 23:08:49,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1400 conditions, 638 events. 374/638 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 2735 event pairs, 291 based on Foata normal form. 11/325 useless extension candidates. Maximal degree in co-relation 1385. Up to 610 conditions per place. [2023-11-06 23:08:49,275 INFO L140 encePairwiseOnDemand]: 622/629 looper letters, 36 selfloop transitions, 39 changer transitions 0/75 dead transitions. [2023-11-06 23:08:49,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 75 transitions, 494 flow [2023-11-06 23:08:49,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 23:08:49,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 23:08:49,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3050 transitions. [2023-11-06 23:08:49,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4040805511393747 [2023-11-06 23:08:49,289 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3050 transitions. [2023-11-06 23:08:49,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3050 transitions. [2023-11-06 23:08:49,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:49,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3050 transitions. [2023-11-06 23:08:49,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 254.16666666666666) internal successors, (3050), 12 states have internal predecessors, (3050), 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) [2023-11-06 23:08:49,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 629.0) internal successors, (8177), 13 states have internal predecessors, (8177), 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) [2023-11-06 23:08:49,316 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 629.0) internal successors, (8177), 13 states have internal predecessors, (8177), 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) [2023-11-06 23:08:49,317 INFO L175 Difference]: Start difference. First operand has 51 places, 53 transitions, 212 flow. Second operand 12 states and 3050 transitions. [2023-11-06 23:08:49,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 75 transitions, 494 flow [2023-11-06 23:08:49,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 75 transitions, 493 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:08:49,320 INFO L231 Difference]: Finished difference. Result has 67 places, 75 transitions, 482 flow [2023-11-06 23:08:49,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=482, PETRI_PLACES=67, PETRI_TRANSITIONS=75} [2023-11-06 23:08:49,321 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2023-11-06 23:08:49,321 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 75 transitions, 482 flow [2023-11-06 23:08:49,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 248.0) internal successors, (2976), 12 states have internal predecessors, (2976), 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) [2023-11-06 23:08:49,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:49,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:08:49,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:49,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:49,538 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:08:49,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:49,538 INFO L85 PathProgramCache]: Analyzing trace with hash -175841706, now seen corresponding path program 1 times [2023-11-06 23:08:49,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:49,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1741218849] [2023-11-06 23:08:49,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:49,539 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:49,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:49,540 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:08:49,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-06 23:08:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:49,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:08:49,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:49,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:49,695 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:08:49,695 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:49,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1741218849] [2023-11-06 23:08:49,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1741218849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:49,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:49,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:08:49,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451182827] [2023-11-06 23:08:49,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:49,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:08:49,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:49,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:08:49,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:08:50,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 629 [2023-11-06 23:08:50,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 482 flow. Second operand has 5 states, 5 states have (on average 253.2) internal successors, (1266), 5 states have internal predecessors, (1266), 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) [2023-11-06 23:08:50,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:50,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 629 [2023-11-06 23:08:50,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:50,862 INFO L124 PetriNetUnfolderBase]: 451/791 cut-off events. [2023-11-06 23:08:50,862 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2023-11-06 23:08:50,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1871 conditions, 791 events. 451/791 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3714 event pairs, 297 based on Foata normal form. 0/435 useless extension candidates. Maximal degree in co-relation 1849. Up to 637 conditions per place. [2023-11-06 23:08:50,868 INFO L140 encePairwiseOnDemand]: 620/629 looper letters, 119 selfloop transitions, 4 changer transitions 0/123 dead transitions. [2023-11-06 23:08:50,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 123 transitions, 979 flow [2023-11-06 23:08:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:08:50,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:08:50,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1334 transitions. [2023-11-06 23:08:50,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4241653418124006 [2023-11-06 23:08:50,874 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1334 transitions. [2023-11-06 23:08:50,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1334 transitions. [2023-11-06 23:08:50,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:50,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1334 transitions. [2023-11-06 23:08:50,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 266.8) internal successors, (1334), 5 states have internal predecessors, (1334), 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) [2023-11-06 23:08:50,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 629.0) internal successors, (3774), 6 states have internal predecessors, (3774), 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) [2023-11-06 23:08:50,886 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 629.0) internal successors, (3774), 6 states have internal predecessors, (3774), 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) [2023-11-06 23:08:50,886 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 482 flow. Second operand 5 states and 1334 transitions. [2023-11-06 23:08:50,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 123 transitions, 979 flow [2023-11-06 23:08:50,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 123 transitions, 801 flow, removed 58 selfloop flow, removed 5 redundant places. [2023-11-06 23:08:50,893 INFO L231 Difference]: Finished difference. Result has 68 places, 76 transitions, 389 flow [2023-11-06 23:08:50,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=389, PETRI_PLACES=68, PETRI_TRANSITIONS=76} [2023-11-06 23:08:50,894 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 14 predicate places. [2023-11-06 23:08:50,895 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 76 transitions, 389 flow [2023-11-06 23:08:50,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 253.2) internal successors, (1266), 5 states have internal predecessors, (1266), 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) [2023-11-06 23:08:50,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:50,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:50,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:51,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:51,107 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:08:51,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:51,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1743931418, now seen corresponding path program 1 times [2023-11-06 23:08:51,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:51,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237145259] [2023-11-06 23:08:51,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:51,108 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:51,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:51,110 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:08:51,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-06 23:08:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:51,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:08:51,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:08:51,277 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:08:51,277 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:51,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237145259] [2023-11-06 23:08:51,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237145259] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:51,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:51,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:08:51,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981836984] [2023-11-06 23:08:51,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:51,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:08:51,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:51,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:08:51,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:08:51,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 629 [2023-11-06 23:08:51,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 76 transitions, 389 flow. Second operand has 5 states, 5 states have (on average 253.4) internal successors, (1267), 5 states have internal predecessors, (1267), 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) [2023-11-06 23:08:51,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:51,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 629 [2023-11-06 23:08:51,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:52,560 INFO L124 PetriNetUnfolderBase]: 585/1055 cut-off events. [2023-11-06 23:08:52,560 INFO L125 PetriNetUnfolderBase]: For 243/243 co-relation queries the response was YES. [2023-11-06 23:08:52,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2499 conditions, 1055 events. 585/1055 cut-off events. For 243/243 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5392 event pairs, 363 based on Foata normal form. 16/652 useless extension candidates. Maximal degree in co-relation 2475. Up to 779 conditions per place. [2023-11-06 23:08:52,567 INFO L140 encePairwiseOnDemand]: 620/629 looper letters, 89 selfloop transitions, 15 changer transitions 0/104 dead transitions. [2023-11-06 23:08:52,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 104 transitions, 664 flow [2023-11-06 23:08:52,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:08:52,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:08:52,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1331 transitions. [2023-11-06 23:08:52,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42321144674085853 [2023-11-06 23:08:52,573 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1331 transitions. [2023-11-06 23:08:52,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1331 transitions. [2023-11-06 23:08:52,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:52,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1331 transitions. [2023-11-06 23:08:52,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 266.2) internal successors, (1331), 5 states have internal predecessors, (1331), 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) [2023-11-06 23:08:52,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 629.0) internal successors, (3774), 6 states have internal predecessors, (3774), 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) [2023-11-06 23:08:52,584 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 629.0) internal successors, (3774), 6 states have internal predecessors, (3774), 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) [2023-11-06 23:08:52,584 INFO L175 Difference]: Start difference. First operand has 68 places, 76 transitions, 389 flow. Second operand 5 states and 1331 transitions. [2023-11-06 23:08:52,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 104 transitions, 664 flow [2023-11-06 23:08:52,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 644 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-06 23:08:52,591 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 428 flow [2023-11-06 23:08:52,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=428, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2023-11-06 23:08:52,592 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 18 predicate places. [2023-11-06 23:08:52,592 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 428 flow [2023-11-06 23:08:52,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 253.4) internal successors, (1267), 5 states have internal predecessors, (1267), 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) [2023-11-06 23:08:52,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:52,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:52,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-11-06 23:08:52,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:52,805 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:08:52,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:52,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1475678036, now seen corresponding path program 1 times [2023-11-06 23:08:52,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:52,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228747759] [2023-11-06 23:08:52,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:52,806 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:52,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:52,807 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:08:52,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-06 23:08:52,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:52,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:08:52,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:52,920 INFO L351 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 8 treesize of output 7 [2023-11-06 23:08:53,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:53,059 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:08:53,060 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:53,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228747759] [2023-11-06 23:08:53,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228747759] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:53,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:53,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:08:53,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989694083] [2023-11-06 23:08:53,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:53,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:08:53,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:53,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:08:53,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:08:53,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 629 [2023-11-06 23:08:53,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 428 flow. Second operand has 5 states, 5 states have (on average 254.6) internal successors, (1273), 5 states have internal predecessors, (1273), 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) [2023-11-06 23:08:53,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:53,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 629 [2023-11-06 23:08:53,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:54,562 INFO L124 PetriNetUnfolderBase]: 950/1698 cut-off events. [2023-11-06 23:08:54,562 INFO L125 PetriNetUnfolderBase]: For 856/856 co-relation queries the response was YES. [2023-11-06 23:08:54,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4184 conditions, 1698 events. 950/1698 cut-off events. For 856/856 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 9807 event pairs, 471 based on Foata normal form. 0/974 useless extension candidates. Maximal degree in co-relation 4159. Up to 1009 conditions per place. [2023-11-06 23:08:54,577 INFO L140 encePairwiseOnDemand]: 624/629 looper letters, 83 selfloop transitions, 23 changer transitions 0/106 dead transitions. [2023-11-06 23:08:54,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 106 transitions, 742 flow [2023-11-06 23:08:54,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:08:54,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:08:54,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1328 transitions. [2023-11-06 23:08:54,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222575516693164 [2023-11-06 23:08:54,583 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1328 transitions. [2023-11-06 23:08:54,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1328 transitions. [2023-11-06 23:08:54,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:54,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1328 transitions. [2023-11-06 23:08:54,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 265.6) internal successors, (1328), 5 states have internal predecessors, (1328), 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) [2023-11-06 23:08:54,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 629.0) internal successors, (3774), 6 states have internal predecessors, (3774), 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) [2023-11-06 23:08:54,594 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 629.0) internal successors, (3774), 6 states have internal predecessors, (3774), 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) [2023-11-06 23:08:54,594 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 428 flow. Second operand 5 states and 1328 transitions. [2023-11-06 23:08:54,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 106 transitions, 742 flow [2023-11-06 23:08:54,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 106 transitions, 717 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:08:54,640 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 457 flow [2023-11-06 23:08:54,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=457, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2023-11-06 23:08:54,641 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 21 predicate places. [2023-11-06 23:08:54,641 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 457 flow [2023-11-06 23:08:54,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 254.6) internal successors, (1273), 5 states have internal predecessors, (1273), 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) [2023-11-06 23:08:54,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:54,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:54,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:54,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:54,842 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:08:54,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:54,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1475678087, now seen corresponding path program 1 times [2023-11-06 23:08:54,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:54,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60625319] [2023-11-06 23:08:54,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:54,843 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:54,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:54,844 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:08:54,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-06 23:08:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:54,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:08:54,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:55,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:55,009 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:08:55,009 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:55,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60625319] [2023-11-06 23:08:55,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60625319] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:55,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:55,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:08:55,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699363994] [2023-11-06 23:08:55,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:55,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:08:55,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:55,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:08:55,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:08:55,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 629 [2023-11-06 23:08:55,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 457 flow. Second operand has 5 states, 5 states have (on average 253.6) internal successors, (1268), 5 states have internal predecessors, (1268), 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) [2023-11-06 23:08:55,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:55,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 629 [2023-11-06 23:08:55,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:56,073 INFO L124 PetriNetUnfolderBase]: 772/1372 cut-off events. [2023-11-06 23:08:56,073 INFO L125 PetriNetUnfolderBase]: For 735/735 co-relation queries the response was YES. [2023-11-06 23:08:56,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3631 conditions, 1372 events. 772/1372 cut-off events. For 735/735 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 7212 event pairs, 618 based on Foata normal form. 16/888 useless extension candidates. Maximal degree in co-relation 3605. Up to 1238 conditions per place. [2023-11-06 23:08:56,090 INFO L140 encePairwiseOnDemand]: 621/629 looper letters, 113 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2023-11-06 23:08:56,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 899 flow [2023-11-06 23:08:56,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:08:56,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:08:56,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1323 transitions. [2023-11-06 23:08:56,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4206677265500795 [2023-11-06 23:08:56,095 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1323 transitions. [2023-11-06 23:08:56,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1323 transitions. [2023-11-06 23:08:56,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:56,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1323 transitions. [2023-11-06 23:08:56,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 264.6) internal successors, (1323), 5 states have internal predecessors, (1323), 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) [2023-11-06 23:08:56,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 629.0) internal successors, (3774), 6 states have internal predecessors, (3774), 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) [2023-11-06 23:08:56,107 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 629.0) internal successors, (3774), 6 states have internal predecessors, (3774), 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) [2023-11-06 23:08:56,107 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 457 flow. Second operand 5 states and 1323 transitions. [2023-11-06 23:08:56,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 899 flow [2023-11-06 23:08:56,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 117 transitions, 834 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 23:08:56,114 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 438 flow [2023-11-06 23:08:56,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=438, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2023-11-06 23:08:56,116 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 24 predicate places. [2023-11-06 23:08:56,116 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 438 flow [2023-11-06 23:08:56,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 253.6) internal successors, (1268), 5 states have internal predecessors, (1268), 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) [2023-11-06 23:08:56,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:56,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:56,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:56,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:56,348 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:08:56,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:56,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1761088695, now seen corresponding path program 1 times [2023-11-06 23:08:56,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:56,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615697485] [2023-11-06 23:08:56,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:56,349 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:56,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:56,354 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:08:56,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-06 23:08:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:56,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:08:56,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:56,506 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-11-06 23:08:56,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:56,514 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:08:56,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:56,533 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:08:56,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:56,542 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:08:56,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:56,550 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:08:56,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:08:56,555 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:08:56,593 INFO L322 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-06 23:08:56,593 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-11-06 23:08:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:08:56,617 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:08:56,617 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:56,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615697485] [2023-11-06 23:08:56,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [615697485] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:56,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:56,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:08:56,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322966892] [2023-11-06 23:08:56,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:56,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:08:56,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:56,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:08:56,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:08:56,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 629 [2023-11-06 23:08:56,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 438 flow. Second operand has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 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) [2023-11-06 23:08:56,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:56,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 629 [2023-11-06 23:08:56,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:57,521 INFO L124 PetriNetUnfolderBase]: 598/1078 cut-off events. [2023-11-06 23:08:57,521 INFO L125 PetriNetUnfolderBase]: For 750/750 co-relation queries the response was YES. [2023-11-06 23:08:57,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3093 conditions, 1078 events. 598/1078 cut-off events. For 750/750 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5404 event pairs, 492 based on Foata normal form. 0/817 useless extension candidates. Maximal degree in co-relation 3064. Up to 1032 conditions per place. [2023-11-06 23:08:57,530 INFO L140 encePairwiseOnDemand]: 623/629 looper letters, 55 selfloop transitions, 22 changer transitions 0/77 dead transitions. [2023-11-06 23:08:57,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 77 transitions, 580 flow [2023-11-06 23:08:57,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:08:57,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:08:57,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1272 transitions. [2023-11-06 23:08:57,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4044515103338633 [2023-11-06 23:08:57,536 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1272 transitions. [2023-11-06 23:08:57,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1272 transitions. [2023-11-06 23:08:57,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:57,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1272 transitions. [2023-11-06 23:08:57,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 254.4) internal successors, (1272), 5 states have internal predecessors, (1272), 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) [2023-11-06 23:08:57,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 629.0) internal successors, (3774), 6 states have internal predecessors, (3774), 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) [2023-11-06 23:08:57,545 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 629.0) internal successors, (3774), 6 states have internal predecessors, (3774), 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) [2023-11-06 23:08:57,546 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 438 flow. Second operand 5 states and 1272 transitions. [2023-11-06 23:08:57,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 77 transitions, 580 flow [2023-11-06 23:08:57,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 77 transitions, 575 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:08:57,551 INFO L231 Difference]: Finished difference. Result has 77 places, 77 transitions, 465 flow [2023-11-06 23:08:57,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=465, PETRI_PLACES=77, PETRI_TRANSITIONS=77} [2023-11-06 23:08:57,552 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 23 predicate places. [2023-11-06 23:08:57,553 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 77 transitions, 465 flow [2023-11-06 23:08:57,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 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) [2023-11-06 23:08:57,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:57,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:57,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:57,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:57,766 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:08:57,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:57,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1761088498, now seen corresponding path program 1 times [2023-11-06 23:08:57,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:57,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348240167] [2023-11-06 23:08:57,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:57,767 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:57,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:57,769 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:08:57,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-06 23:08:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:57,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:08:57,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:57,880 INFO L351 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 [2023-11-06 23:08:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:08:57,900 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:08:57,900 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:57,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348240167] [2023-11-06 23:08:57,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348240167] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:57,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:57,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:08:57,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758011921] [2023-11-06 23:08:57,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:57,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:08:57,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:57,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:08:57,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:08:58,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 629 [2023-11-06 23:08:58,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 465 flow. Second operand has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 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) [2023-11-06 23:08:58,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:08:58,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 629 [2023-11-06 23:08:58,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:08:58,626 INFO L124 PetriNetUnfolderBase]: 448/824 cut-off events. [2023-11-06 23:08:58,626 INFO L125 PetriNetUnfolderBase]: For 689/689 co-relation queries the response was YES. [2023-11-06 23:08:58,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2425 conditions, 824 events. 448/824 cut-off events. For 689/689 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3907 event pairs, 354 based on Foata normal form. 0/704 useless extension candidates. Maximal degree in co-relation 2396. Up to 778 conditions per place. [2023-11-06 23:08:58,633 INFO L140 encePairwiseOnDemand]: 624/629 looper letters, 63 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2023-11-06 23:08:58,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 74 transitions, 601 flow [2023-11-06 23:08:58,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:08:58,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:08:58,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1022 transitions. [2023-11-06 23:08:58,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40620031796502387 [2023-11-06 23:08:58,637 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1022 transitions. [2023-11-06 23:08:58,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1022 transitions. [2023-11-06 23:08:58,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:08:58,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1022 transitions. [2023-11-06 23:08:58,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 255.5) internal successors, (1022), 4 states have internal predecessors, (1022), 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) [2023-11-06 23:08:58,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 629.0) internal successors, (3145), 5 states have internal predecessors, (3145), 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) [2023-11-06 23:08:58,646 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 629.0) internal successors, (3145), 5 states have internal predecessors, (3145), 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) [2023-11-06 23:08:58,646 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 465 flow. Second operand 4 states and 1022 transitions. [2023-11-06 23:08:58,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 74 transitions, 601 flow [2023-11-06 23:08:58,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 74 transitions, 567 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 23:08:58,652 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 441 flow [2023-11-06 23:08:58,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=441, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2023-11-06 23:08:58,654 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 20 predicate places. [2023-11-06 23:08:58,654 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 441 flow [2023-11-06 23:08:58,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 249.0) internal successors, (996), 4 states have internal predecessors, (996), 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) [2023-11-06 23:08:58,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:08:58,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:08:58,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-11-06 23:08:58,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:58,867 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:08:58,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:58,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1761088497, now seen corresponding path program 1 times [2023-11-06 23:08:58,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:08:58,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461392908] [2023-11-06 23:08:58,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:58,868 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:08:58,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:08:58,870 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:08:58,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-06 23:08:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:58,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:08:58,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:08:59,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:08:59,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:08:59,284 INFO L351 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 25 treesize of output 21 [2023-11-06 23:08:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:08:59,355 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:08:59,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461392908] [2023-11-06 23:08:59,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461392908] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:08:59,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:08:59,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-06 23:08:59,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775711552] [2023-11-06 23:08:59,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:08:59,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:08:59,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:08:59,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:08:59,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:09:03,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 629 [2023-11-06 23:09:03,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 441 flow. Second operand has 10 states, 10 states have (on average 244.4) internal successors, (2444), 10 states have internal predecessors, (2444), 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) [2023-11-06 23:09:03,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:03,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 629 [2023-11-06 23:09:03,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:05,363 INFO L124 PetriNetUnfolderBase]: 662/1204 cut-off events. [2023-11-06 23:09:05,363 INFO L125 PetriNetUnfolderBase]: For 913/913 co-relation queries the response was YES. [2023-11-06 23:09:05,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3417 conditions, 1204 events. 662/1204 cut-off events. For 913/913 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6075 event pairs, 236 based on Foata normal form. 0/1029 useless extension candidates. Maximal degree in co-relation 3388. Up to 408 conditions per place. [2023-11-06 23:09:05,371 INFO L140 encePairwiseOnDemand]: 618/629 looper letters, 94 selfloop transitions, 30 changer transitions 0/124 dead transitions. [2023-11-06 23:09:05,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 124 transitions, 861 flow [2023-11-06 23:09:05,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:09:05,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 23:09:05,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2032 transitions. [2023-11-06 23:09:05,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40381558028616854 [2023-11-06 23:09:05,377 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2032 transitions. [2023-11-06 23:09:05,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2032 transitions. [2023-11-06 23:09:05,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:05,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2032 transitions. [2023-11-06 23:09:05,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 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) [2023-11-06 23:09:05,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 629.0) internal successors, (5661), 9 states have internal predecessors, (5661), 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) [2023-11-06 23:09:05,388 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 629.0) internal successors, (5661), 9 states have internal predecessors, (5661), 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) [2023-11-06 23:09:05,389 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 441 flow. Second operand 8 states and 2032 transitions. [2023-11-06 23:09:05,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 124 transitions, 861 flow [2023-11-06 23:09:05,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 124 transitions, 849 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:09:05,395 INFO L231 Difference]: Finished difference. Result has 80 places, 76 transitions, 518 flow [2023-11-06 23:09:05,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=518, PETRI_PLACES=80, PETRI_TRANSITIONS=76} [2023-11-06 23:09:05,396 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 26 predicate places. [2023-11-06 23:09:05,396 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 76 transitions, 518 flow [2023-11-06 23:09:05,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 244.4) internal successors, (2444), 10 states have internal predecessors, (2444), 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) [2023-11-06 23:09:05,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:05,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:05,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:05,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:09:05,610 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:09:05,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:05,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1761088694, now seen corresponding path program 1 times [2023-11-06 23:09:05,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:09:05,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958884613] [2023-11-06 23:09:05,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:05,611 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:09:05,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:09:05,613 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:09:05,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-06 23:09:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:05,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 23:09:05,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:05,810 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 23:09:05,819 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-11-06 23:09:05,836 INFO L351 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 [2023-11-06 23:09:05,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:05,848 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:09:05,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:05,863 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:09:05,872 INFO L351 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 [2023-11-06 23:09:05,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:05,889 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:09:05,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:05,919 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:09:05,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:05,935 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:09:06,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:06,044 INFO L351 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 16 treesize of output 11 [2023-11-06 23:09:06,066 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 23:09:06,066 INFO L351 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 [2023-11-06 23:09:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:09:06,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:09:06,813 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:09:06,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958884613] [2023-11-06 23:09:06,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958884613] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:06,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:09:06,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 23:09:06,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62668248] [2023-11-06 23:09:06,814 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:06,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:09:06,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:09:06,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:09:06,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:09:15,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 629 [2023-11-06 23:09:15,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 518 flow. Second operand has 10 states, 10 states have (on average 234.6) internal successors, (2346), 10 states have internal predecessors, (2346), 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) [2023-11-06 23:09:15,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:15,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 629 [2023-11-06 23:09:15,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:20,458 INFO L124 PetriNetUnfolderBase]: 1666/3008 cut-off events. [2023-11-06 23:09:20,458 INFO L125 PetriNetUnfolderBase]: For 2862/2862 co-relation queries the response was YES. [2023-11-06 23:09:20,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8908 conditions, 3008 events. 1666/3008 cut-off events. For 2862/2862 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18232 event pairs, 496 based on Foata normal form. 0/2804 useless extension candidates. Maximal degree in co-relation 8877. Up to 687 conditions per place. [2023-11-06 23:09:20,477 INFO L140 encePairwiseOnDemand]: 616/629 looper letters, 167 selfloop transitions, 59 changer transitions 0/226 dead transitions. [2023-11-06 23:09:20,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 226 transitions, 1741 flow [2023-11-06 23:09:20,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 23:09:20,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 23:09:20,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4833 transitions. [2023-11-06 23:09:20,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384181240063593 [2023-11-06 23:09:20,495 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4833 transitions. [2023-11-06 23:09:20,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4833 transitions. [2023-11-06 23:09:20,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:20,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4833 transitions. [2023-11-06 23:09:20,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 241.65) internal successors, (4833), 20 states have internal predecessors, (4833), 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) [2023-11-06 23:09:20,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 629.0) internal successors, (13209), 21 states have internal predecessors, (13209), 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) [2023-11-06 23:09:20,528 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 629.0) internal successors, (13209), 21 states have internal predecessors, (13209), 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) [2023-11-06 23:09:20,528 INFO L175 Difference]: Start difference. First operand has 80 places, 76 transitions, 518 flow. Second operand 20 states and 4833 transitions. [2023-11-06 23:09:20,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 226 transitions, 1741 flow [2023-11-06 23:09:20,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 226 transitions, 1692 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-06 23:09:20,542 INFO L231 Difference]: Finished difference. Result has 96 places, 106 transitions, 873 flow [2023-11-06 23:09:20,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=873, PETRI_PLACES=96, PETRI_TRANSITIONS=106} [2023-11-06 23:09:20,543 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 42 predicate places. [2023-11-06 23:09:20,543 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 106 transitions, 873 flow [2023-11-06 23:09:20,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 234.6) internal successors, (2346), 10 states have internal predecessors, (2346), 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) [2023-11-06 23:09:20,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:20,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:20,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:20,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:09:20,763 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:09:20,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:20,763 INFO L85 PathProgramCache]: Analyzing trace with hash 885324092, now seen corresponding path program 1 times [2023-11-06 23:09:20,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:09:20,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076206543] [2023-11-06 23:09:20,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:20,764 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:09:20,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:09:20,765 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:09:20,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-06 23:09:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:20,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:09:20,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:20,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:09:20,993 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:09:20,993 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:09:20,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076206543] [2023-11-06 23:09:20,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076206543] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:20,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:20,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:09:20,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383493247] [2023-11-06 23:09:20,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:20,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:09:20,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:09:20,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:09:20,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:09:21,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 629 [2023-11-06 23:09:21,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 106 transitions, 873 flow. Second operand has 5 states, 5 states have (on average 253.8) internal successors, (1269), 5 states have internal predecessors, (1269), 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) [2023-11-06 23:09:21,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:21,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 629 [2023-11-06 23:09:21,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:22,558 INFO L124 PetriNetUnfolderBase]: 1507/2723 cut-off events. [2023-11-06 23:09:22,558 INFO L125 PetriNetUnfolderBase]: For 3920/3920 co-relation queries the response was YES. [2023-11-06 23:09:22,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8589 conditions, 2723 events. 1507/2723 cut-off events. For 3920/3920 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 15770 event pairs, 1193 based on Foata normal form. 48/2663 useless extension candidates. Maximal degree in co-relation 8557. Up to 2485 conditions per place. [2023-11-06 23:09:22,587 INFO L140 encePairwiseOnDemand]: 623/629 looper letters, 107 selfloop transitions, 19 changer transitions 0/126 dead transitions. [2023-11-06 23:09:22,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 126 transitions, 1210 flow [2023-11-06 23:09:22,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:09:22,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:09:22,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1310 transitions. [2023-11-06 23:09:22,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4165341812400636 [2023-11-06 23:09:22,602 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1310 transitions. [2023-11-06 23:09:22,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1310 transitions. [2023-11-06 23:09:22,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:22,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1310 transitions. [2023-11-06 23:09:22,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 262.0) internal successors, (1310), 5 states have internal predecessors, (1310), 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) [2023-11-06 23:09:22,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 629.0) internal successors, (3774), 6 states have internal predecessors, (3774), 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) [2023-11-06 23:09:22,615 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 629.0) internal successors, (3774), 6 states have internal predecessors, (3774), 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) [2023-11-06 23:09:22,616 INFO L175 Difference]: Start difference. First operand has 96 places, 106 transitions, 873 flow. Second operand 5 states and 1310 transitions. [2023-11-06 23:09:22,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 126 transitions, 1210 flow [2023-11-06 23:09:22,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 126 transitions, 1096 flow, removed 27 selfloop flow, removed 5 redundant places. [2023-11-06 23:09:22,636 INFO L231 Difference]: Finished difference. Result has 97 places, 108 transitions, 830 flow [2023-11-06 23:09:22,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=830, PETRI_PLACES=97, PETRI_TRANSITIONS=108} [2023-11-06 23:09:22,638 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 43 predicate places. [2023-11-06 23:09:22,638 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 108 transitions, 830 flow [2023-11-06 23:09:22,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 253.8) internal successors, (1269), 5 states have internal predecessors, (1269), 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) [2023-11-06 23:09:22,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:22,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:22,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-11-06 23:09:22,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:09:22,854 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:09:22,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:22,854 INFO L85 PathProgramCache]: Analyzing trace with hash -184644437, now seen corresponding path program 1 times [2023-11-06 23:09:22,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:09:22,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68138747] [2023-11-06 23:09:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:22,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:09:22,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:09:22,857 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:09:22,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-06 23:09:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:23,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 23:09:23,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:23,186 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 23:09:23,194 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-11-06 23:09:23,219 INFO L351 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 [2023-11-06 23:09:23,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:23,233 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:09:23,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:23,269 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:09:23,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:23,282 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:09:23,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:23,298 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:09:23,307 INFO L351 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 [2023-11-06 23:09:23,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:23,320 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:09:23,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:23,483 INFO L351 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 16 treesize of output 11 [2023-11-06 23:09:23,496 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 23:09:23,497 INFO L351 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 [2023-11-06 23:09:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:09:23,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:09:24,367 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:09:24,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [68138747] [2023-11-06 23:09:24,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [68138747] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:24,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:09:24,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 23:09:24,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465119916] [2023-11-06 23:09:24,367 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:24,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:09:24,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:09:24,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:09:24,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:09:32,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 629 [2023-11-06 23:09:32,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 108 transitions, 830 flow. Second operand has 10 states, 10 states have (on average 235.0) internal successors, (2350), 10 states have internal predecessors, (2350), 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) [2023-11-06 23:09:32,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:32,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 629 [2023-11-06 23:09:32,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:36,993 INFO L124 PetriNetUnfolderBase]: 1407/2555 cut-off events. [2023-11-06 23:09:36,993 INFO L125 PetriNetUnfolderBase]: For 4273/4273 co-relation queries the response was YES. [2023-11-06 23:09:37,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8343 conditions, 2555 events. 1407/2555 cut-off events. For 4273/4273 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14825 event pairs, 807 based on Foata normal form. 68/2483 useless extension candidates. Maximal degree in co-relation 8311. Up to 964 conditions per place. [2023-11-06 23:09:37,014 INFO L140 encePairwiseOnDemand]: 618/629 looper letters, 189 selfloop transitions, 52 changer transitions 0/241 dead transitions. [2023-11-06 23:09:37,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 241 transitions, 2015 flow [2023-11-06 23:09:37,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 23:09:37,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 23:09:37,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 4829 transitions. [2023-11-06 23:09:37,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38386327503974566 [2023-11-06 23:09:37,026 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 4829 transitions. [2023-11-06 23:09:37,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 4829 transitions. [2023-11-06 23:09:37,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:37,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 4829 transitions. [2023-11-06 23:09:37,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 241.45) internal successors, (4829), 20 states have internal predecessors, (4829), 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) [2023-11-06 23:09:37,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 629.0) internal successors, (13209), 21 states have internal predecessors, (13209), 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) [2023-11-06 23:09:37,056 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 629.0) internal successors, (13209), 21 states have internal predecessors, (13209), 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) [2023-11-06 23:09:37,056 INFO L175 Difference]: Start difference. First operand has 97 places, 108 transitions, 830 flow. Second operand 20 states and 4829 transitions. [2023-11-06 23:09:37,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 241 transitions, 2015 flow [2023-11-06 23:09:37,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 241 transitions, 1984 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 23:09:37,076 INFO L231 Difference]: Finished difference. Result has 116 places, 116 transitions, 980 flow [2023-11-06 23:09:37,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=980, PETRI_PLACES=116, PETRI_TRANSITIONS=116} [2023-11-06 23:09:37,077 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 62 predicate places. [2023-11-06 23:09:37,078 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 116 transitions, 980 flow [2023-11-06 23:09:37,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 235.0) internal successors, (2350), 10 states have internal predecessors, (2350), 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) [2023-11-06 23:09:37,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:37,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:37,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:37,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:09:37,322 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:09:37,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:37,323 INFO L85 PathProgramCache]: Analyzing trace with hash -189087378, now seen corresponding path program 1 times [2023-11-06 23:09:37,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:09:37,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50508664] [2023-11-06 23:09:37,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:37,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:09:37,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:09:37,326 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:09:37,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-06 23:09:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:37,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 23:09:37,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:37,538 INFO L351 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 8 treesize of output 7 [2023-11-06 23:09:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:09:37,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:09:38,520 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:09:38,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50508664] [2023-11-06 23:09:38,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50508664] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:38,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:09:38,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-06 23:09:38,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352720043] [2023-11-06 23:09:38,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:38,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:09:38,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:09:38,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:09:38,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:09:45,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 629 [2023-11-06 23:09:45,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 116 transitions, 980 flow. Second operand has 12 states, 12 states have (on average 247.5) internal successors, (2970), 12 states have internal predecessors, (2970), 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) [2023-11-06 23:09:45,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:45,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 629 [2023-11-06 23:09:45,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:49,806 INFO L124 PetriNetUnfolderBase]: 3095/5533 cut-off events. [2023-11-06 23:09:49,806 INFO L125 PetriNetUnfolderBase]: For 14010/14010 co-relation queries the response was YES. [2023-11-06 23:09:49,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19388 conditions, 5533 events. 3095/5533 cut-off events. For 14010/14010 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 35950 event pairs, 397 based on Foata normal form. 54/5555 useless extension candidates. Maximal degree in co-relation 19353. Up to 1104 conditions per place. [2023-11-06 23:09:49,842 INFO L140 encePairwiseOnDemand]: 620/629 looper letters, 199 selfloop transitions, 58 changer transitions 0/257 dead transitions. [2023-11-06 23:09:49,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 257 transitions, 2375 flow [2023-11-06 23:09:49,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:09:49,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 23:09:49,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2335 transitions. [2023-11-06 23:09:49,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.412471294824236 [2023-11-06 23:09:49,848 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2335 transitions. [2023-11-06 23:09:49,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2335 transitions. [2023-11-06 23:09:49,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:49,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2335 transitions. [2023-11-06 23:09:49,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 259.44444444444446) internal successors, (2335), 9 states have internal predecessors, (2335), 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) [2023-11-06 23:09:49,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 629.0) internal successors, (6290), 10 states have internal predecessors, (6290), 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) [2023-11-06 23:09:49,859 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 629.0) internal successors, (6290), 10 states have internal predecessors, (6290), 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) [2023-11-06 23:09:49,859 INFO L175 Difference]: Start difference. First operand has 116 places, 116 transitions, 980 flow. Second operand 9 states and 2335 transitions. [2023-11-06 23:09:49,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 257 transitions, 2375 flow [2023-11-06 23:09:49,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 257 transitions, 2261 flow, removed 28 selfloop flow, removed 12 redundant places. [2023-11-06 23:09:49,906 INFO L231 Difference]: Finished difference. Result has 117 places, 134 transitions, 1251 flow [2023-11-06 23:09:49,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=910, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1251, PETRI_PLACES=117, PETRI_TRANSITIONS=134} [2023-11-06 23:09:49,907 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 63 predicate places. [2023-11-06 23:09:49,907 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 134 transitions, 1251 flow [2023-11-06 23:09:49,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 247.5) internal successors, (2970), 12 states have internal predecessors, (2970), 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) [2023-11-06 23:09:49,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:49,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:49,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-11-06 23:09:50,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:09:50,125 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:09:50,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:50,125 INFO L85 PathProgramCache]: Analyzing trace with hash -189087575, now seen corresponding path program 1 times [2023-11-06 23:09:50,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:09:50,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858091250] [2023-11-06 23:09:50,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:50,126 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:09:50,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:09:50,127 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:09:50,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-06 23:09:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:50,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:09:50,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:09:50,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:09:50,568 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:09:50,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858091250] [2023-11-06 23:09:50,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858091250] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:50,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:09:50,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 23:09:50,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077964822] [2023-11-06 23:09:50,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:50,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:09:50,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:09:50,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:09:50,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:09:52,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 629 [2023-11-06 23:09:52,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 134 transitions, 1251 flow. Second operand has 12 states, 12 states have (on average 249.66666666666666) internal successors, (2996), 12 states have internal predecessors, (2996), 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) [2023-11-06 23:09:52,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:52,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 629 [2023-11-06 23:09:52,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:55,681 INFO L124 PetriNetUnfolderBase]: 2427/4373 cut-off events. [2023-11-06 23:09:55,681 INFO L125 PetriNetUnfolderBase]: For 13913/13913 co-relation queries the response was YES. [2023-11-06 23:09:55,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16740 conditions, 4373 events. 2427/4373 cut-off events. For 13913/13913 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 27338 event pairs, 1803 based on Foata normal form. 32/4405 useless extension candidates. Maximal degree in co-relation 16700. Up to 3697 conditions per place. [2023-11-06 23:09:55,714 INFO L140 encePairwiseOnDemand]: 620/629 looper letters, 204 selfloop transitions, 13 changer transitions 0/217 dead transitions. [2023-11-06 23:09:55,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 217 transitions, 2195 flow [2023-11-06 23:09:55,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:09:55,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 23:09:55,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2579 transitions. [2023-11-06 23:09:55,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4100158982511924 [2023-11-06 23:09:55,735 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2579 transitions. [2023-11-06 23:09:55,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2579 transitions. [2023-11-06 23:09:55,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:55,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2579 transitions. [2023-11-06 23:09:55,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 257.9) internal successors, (2579), 10 states have internal predecessors, (2579), 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) [2023-11-06 23:09:55,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 629.0) internal successors, (6919), 11 states have internal predecessors, (6919), 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) [2023-11-06 23:09:55,747 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 629.0) internal successors, (6919), 11 states have internal predecessors, (6919), 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) [2023-11-06 23:09:55,747 INFO L175 Difference]: Start difference. First operand has 117 places, 134 transitions, 1251 flow. Second operand 10 states and 2579 transitions. [2023-11-06 23:09:55,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 217 transitions, 2195 flow [2023-11-06 23:09:55,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 217 transitions, 2120 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-06 23:09:55,788 INFO L231 Difference]: Finished difference. Result has 124 places, 129 transitions, 1193 flow [2023-11-06 23:09:55,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1193, PETRI_PLACES=124, PETRI_TRANSITIONS=129} [2023-11-06 23:09:55,789 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 70 predicate places. [2023-11-06 23:09:55,789 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 129 transitions, 1193 flow [2023-11-06 23:09:55,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 249.66666666666666) internal successors, (2996), 12 states have internal predecessors, (2996), 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) [2023-11-06 23:09:55,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:55,790 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:55,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-11-06 23:09:56,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:09:56,005 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:09:56,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:56,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1956899726, now seen corresponding path program 2 times [2023-11-06 23:09:56,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:09:56,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957477257] [2023-11-06 23:09:56,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:09:56,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:09:56,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:09:56,008 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:09:56,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-06 23:09:56,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 23:09:56,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:56,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 23:09:56,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:56,139 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 23:09:56,145 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-11-06 23:09:56,163 INFO L351 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 [2023-11-06 23:09:56,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:56,182 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:09:56,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:56,204 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:09:56,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:56,235 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:09:56,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:56,255 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:09:56,266 INFO L351 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 [2023-11-06 23:09:56,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:56,279 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:09:56,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:56,403 INFO L351 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 16 treesize of output 11 [2023-11-06 23:09:56,425 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 23:09:56,426 INFO L351 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 [2023-11-06 23:09:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 23:09:56,538 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:09:56,538 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:09:56,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957477257] [2023-11-06 23:09:56,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1957477257] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:56,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:56,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:56,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881357427] [2023-11-06 23:09:56,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:56,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:09:56,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:09:56,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:09:56,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:09:57,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 629 [2023-11-06 23:09:57,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 129 transitions, 1193 flow. Second operand has 5 states, 5 states have (on average 250.6) internal successors, (1253), 5 states have internal predecessors, (1253), 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) [2023-11-06 23:09:57,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:57,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 629 [2023-11-06 23:09:57,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:59,221 INFO L124 PetriNetUnfolderBase]: 2393/4321 cut-off events. [2023-11-06 23:09:59,221 INFO L125 PetriNetUnfolderBase]: For 14168/14168 co-relation queries the response was YES. [2023-11-06 23:09:59,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16480 conditions, 4321 events. 2393/4321 cut-off events. For 14168/14168 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 26979 event pairs, 1483 based on Foata normal form. 26/4347 useless extension candidates. Maximal degree in co-relation 16437. Up to 3032 conditions per place. [2023-11-06 23:09:59,252 INFO L140 encePairwiseOnDemand]: 624/629 looper letters, 133 selfloop transitions, 23 changer transitions 0/156 dead transitions. [2023-11-06 23:09:59,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 156 transitions, 1680 flow [2023-11-06 23:09:59,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:09:59,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:09:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1293 transitions. [2023-11-06 23:09:59,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111287758346582 [2023-11-06 23:09:59,255 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1293 transitions. [2023-11-06 23:09:59,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1293 transitions. [2023-11-06 23:09:59,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:59,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1293 transitions. [2023-11-06 23:09:59,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 258.6) internal successors, (1293), 5 states have internal predecessors, (1293), 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) [2023-11-06 23:09:59,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 629.0) internal successors, (3774), 6 states have internal predecessors, (3774), 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) [2023-11-06 23:09:59,260 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 629.0) internal successors, (3774), 6 states have internal predecessors, (3774), 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) [2023-11-06 23:09:59,260 INFO L175 Difference]: Start difference. First operand has 124 places, 129 transitions, 1193 flow. Second operand 5 states and 1293 transitions. [2023-11-06 23:09:59,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 156 transitions, 1680 flow [2023-11-06 23:09:59,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 156 transitions, 1669 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-06 23:09:59,291 INFO L231 Difference]: Finished difference. Result has 126 places, 128 transitions, 1228 flow [2023-11-06 23:09:59,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=1169, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1228, PETRI_PLACES=126, PETRI_TRANSITIONS=128} [2023-11-06 23:09:59,292 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 72 predicate places. [2023-11-06 23:09:59,292 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 128 transitions, 1228 flow [2023-11-06 23:09:59,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 250.6) internal successors, (1253), 5 states have internal predecessors, (1253), 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) [2023-11-06 23:09:59,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:59,293 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:59,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:59,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:09:59,498 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:09:59,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:59,498 INFO L85 PathProgramCache]: Analyzing trace with hash 991275117, now seen corresponding path program 2 times [2023-11-06 23:09:59,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:09:59,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077526053] [2023-11-06 23:09:59,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:09:59,499 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:09:59,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:09:59,500 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:09:59,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-11-06 23:09:59,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:09:59,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:59,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 23:09:59,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:59,755 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-11-06 23:09:59,765 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:09:59,771 INFO L351 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 8 treesize of output 1 [2023-11-06 23:09:59,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:59,778 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:09:59,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:59,810 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 23:09:59,817 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-11-06 23:09:59,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:59,836 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 23:09:59,841 INFO L351 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 8 treesize of output 1 [2023-11-06 23:09:59,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:09:59,849 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 23:10:00,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:10:00,030 INFO L351 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 [2023-11-06 23:10:00,041 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 23:10:00,042 INFO L351 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 [2023-11-06 23:10:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:10:00,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:10:01,572 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:10:01,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077526053] [2023-11-06 23:10:01,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077526053] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:01,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:10:01,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-06 23:10:01,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156472206] [2023-11-06 23:10:01,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:01,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:10:01,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:10:01,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:10:01,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:10:16,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 629 [2023-11-06 23:10:16,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 128 transitions, 1228 flow. Second operand has 14 states, 14 states have (on average 238.57142857142858) internal successors, (3340), 14 states have internal predecessors, (3340), 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) [2023-11-06 23:10:16,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:16,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 629 [2023-11-06 23:10:16,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:22,254 INFO L124 PetriNetUnfolderBase]: 2356/4268 cut-off events. [2023-11-06 23:10:22,255 INFO L125 PetriNetUnfolderBase]: For 15813/15813 co-relation queries the response was YES. [2023-11-06 23:10:22,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16405 conditions, 4268 events. 2356/4268 cut-off events. For 15813/15813 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 26135 event pairs, 736 based on Foata normal form. 34/4302 useless extension candidates. Maximal degree in co-relation 16360. Up to 1076 conditions per place. [2023-11-06 23:10:22,283 INFO L140 encePairwiseOnDemand]: 619/629 looper letters, 167 selfloop transitions, 70 changer transitions 0/237 dead transitions. [2023-11-06 23:10:22,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 237 transitions, 2345 flow [2023-11-06 23:10:22,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:10:22,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-06 23:10:22,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3206 transitions. [2023-11-06 23:10:22,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920753332518038 [2023-11-06 23:10:22,289 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3206 transitions. [2023-11-06 23:10:22,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3206 transitions. [2023-11-06 23:10:22,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:22,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3206 transitions. [2023-11-06 23:10:22,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 246.6153846153846) internal successors, (3206), 13 states have internal predecessors, (3206), 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) [2023-11-06 23:10:22,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 629.0) internal successors, (8806), 14 states have internal predecessors, (8806), 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) [2023-11-06 23:10:22,303 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 629.0) internal successors, (8806), 14 states have internal predecessors, (8806), 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) [2023-11-06 23:10:22,303 INFO L175 Difference]: Start difference. First operand has 126 places, 128 transitions, 1228 flow. Second operand 13 states and 3206 transitions. [2023-11-06 23:10:22,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 237 transitions, 2345 flow [2023-11-06 23:10:22,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 237 transitions, 2294 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-06 23:10:22,346 INFO L231 Difference]: Finished difference. Result has 135 places, 142 transitions, 1514 flow [2023-11-06 23:10:22,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1514, PETRI_PLACES=135, PETRI_TRANSITIONS=142} [2023-11-06 23:10:22,348 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 81 predicate places. [2023-11-06 23:10:22,348 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 142 transitions, 1514 flow [2023-11-06 23:10:22,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 238.57142857142858) internal successors, (3340), 14 states have internal predecessors, (3340), 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) [2023-11-06 23:10:22,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:22,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:22,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:22,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:10:22,563 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:10:22,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:22,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1429004051, now seen corresponding path program 1 times [2023-11-06 23:10:22,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:10:22,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244408] [2023-11-06 23:10:22,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:22,564 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:10:22,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:10:22,564 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:10:22,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-11-06 23:10:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:22,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:10:22,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:22,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:10:22,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:10:23,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:10:23,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244408] [2023-11-06 23:10:23,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244408] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:23,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:10:23,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 23:10:23,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450823966] [2023-11-06 23:10:23,070 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:23,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:10:23,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:10:23,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:10:23,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:10:25,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 629 [2023-11-06 23:10:25,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 142 transitions, 1514 flow. Second operand has 12 states, 12 states have (on average 249.83333333333334) internal successors, (2998), 12 states have internal predecessors, (2998), 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) [2023-11-06 23:10:25,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:10:25,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 629 [2023-11-06 23:10:25,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:10:27,123 INFO L124 PetriNetUnfolderBase]: 2248/4100 cut-off events. [2023-11-06 23:10:27,123 INFO L125 PetriNetUnfolderBase]: For 14879/14879 co-relation queries the response was YES. [2023-11-06 23:10:27,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16291 conditions, 4100 events. 2248/4100 cut-off events. For 14879/14879 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 25368 event pairs, 1754 based on Foata normal form. 90/4190 useless extension candidates. Maximal degree in co-relation 16245. Up to 3562 conditions per place. [2023-11-06 23:10:27,151 INFO L140 encePairwiseOnDemand]: 620/629 looper letters, 200 selfloop transitions, 14 changer transitions 0/214 dead transitions. [2023-11-06 23:10:27,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 214 transitions, 2331 flow [2023-11-06 23:10:27,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:10:27,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 23:10:27,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2580 transitions. [2023-11-06 23:10:27,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41017488076311603 [2023-11-06 23:10:27,156 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2580 transitions. [2023-11-06 23:10:27,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2580 transitions. [2023-11-06 23:10:27,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:10:27,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2580 transitions. [2023-11-06 23:10:27,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 258.0) internal successors, (2580), 10 states have internal predecessors, (2580), 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) [2023-11-06 23:10:27,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 629.0) internal successors, (6919), 11 states have internal predecessors, (6919), 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) [2023-11-06 23:10:27,169 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 629.0) internal successors, (6919), 11 states have internal predecessors, (6919), 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) [2023-11-06 23:10:27,169 INFO L175 Difference]: Start difference. First operand has 135 places, 142 transitions, 1514 flow. Second operand 10 states and 2580 transitions. [2023-11-06 23:10:27,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 214 transitions, 2331 flow [2023-11-06 23:10:27,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 214 transitions, 2244 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-11-06 23:10:27,214 INFO L231 Difference]: Finished difference. Result has 139 places, 141 transitions, 1474 flow [2023-11-06 23:10:27,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=629, PETRI_DIFFERENCE_MINUEND_FLOW=1438, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1474, PETRI_PLACES=139, PETRI_TRANSITIONS=141} [2023-11-06 23:10:27,215 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 85 predicate places. [2023-11-06 23:10:27,215 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 141 transitions, 1474 flow [2023-11-06 23:10:27,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 249.83333333333334) internal successors, (2998), 12 states have internal predecessors, (2998), 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) [2023-11-06 23:10:27,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:10:27,216 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-11-06 23:10:27,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:27,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:10:27,429 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-06 23:10:27,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:27,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1559582087, now seen corresponding path program 3 times [2023-11-06 23:10:27,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:10:27,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526927904] [2023-11-06 23:10:27,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:10:27,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:10:27,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:10:27,434 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:10:27,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6655eb5c-3135-4d1a-bafa-12c544dff236/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-11-06 23:10:27,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 23:10:27,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:27,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 23:10:27,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:27,749 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 23:10:27,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:10:27,762 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:10:27,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:10:27,777 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:10:27,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:10:27,804 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 23:10:27,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:10:27,812 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:10:27,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:10:27,824 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 23:10:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:28,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:31,305 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:10:31,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526927904] [2023-11-06 23:10:31,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526927904] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:31,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:10:31,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-11-06 23:10:31,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686196018] [2023-11-06 23:10:31,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:31,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 23:10:31,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:10:31,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 23:10:31,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-11-06 23:11:10,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 629 [2023-11-06 23:11:10,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 141 transitions, 1474 flow. Second operand has 24 states, 24 states have (on average 248.0) internal successors, (5952), 24 states have internal predecessors, (5952), 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) [2023-11-06 23:11:10,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:10,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 629 [2023-11-06 23:11:10,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand