./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 21:01:15,742 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 21:01:15,833 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 21:01:15,837 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 21:01:15,838 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 21:01:15,862 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 21:01:15,863 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 21:01:15,863 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 21:01:15,864 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 21:01:15,865 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 21:01:15,866 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 21:01:15,866 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 21:01:15,867 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 21:01:15,867 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 21:01:15,868 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 21:01:15,868 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 21:01:15,868 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 21:01:15,869 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 21:01:15,869 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 21:01:15,870 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 21:01:15,870 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 21:01:15,871 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 21:01:15,871 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 21:01:15,872 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 21:01:15,872 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 21:01:15,872 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 21:01:15,873 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 21:01:15,873 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 21:01:15,874 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 21:01:15,874 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 21:01:15,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:01:15,875 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 21:01:15,875 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 21:01:15,875 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 21:01:15,876 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 21:01:15,876 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 21:01:15,876 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 21:01:15,876 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 21:01:15,876 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 21:01:15,876 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_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 [2023-11-21 21:01:16,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 21:01:16,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 21:01:16,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 21:01:16,128 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 21:01:16,128 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 21:01:16,129 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2023-11-21 21:01:19,160 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 21:01:19,385 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 21:01:19,385 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2023-11-21 21:01:19,395 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/data/a11851291/3524bc86b2a5419a894406bc60172748/FLAGf4f4c68b2 [2023-11-21 21:01:19,410 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/data/a11851291/3524bc86b2a5419a894406bc60172748 [2023-11-21 21:01:19,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 21:01:19,414 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 21:01:19,416 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 21:01:19,416 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 21:01:19,421 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 21:01:19,422 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:01:19" (1/1) ... [2023-11-21 21:01:19,423 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4db3e159 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:19, skipping insertion in model container [2023-11-21 21:01:19,424 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:01:19" (1/1) ... [2023-11-21 21:01:19,472 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 21:01:19,672 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:01:19,685 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) [2023-11-21 21:01:19,691 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@8674ad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:19, skipping insertion in model container [2023-11-21 21:01:19,692 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 21:01:19,692 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-21 21:01:19,694 INFO L158 Benchmark]: Toolchain (without parser) took 279.03ms. Allocated memory is still 136.3MB. Free memory was 92.5MB in the beginning and 81.8MB in the end (delta: 10.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-21 21:01:19,695 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 98.6MB. Free memory is still 48.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 21:01:19,696 INFO L158 Benchmark]: CACSL2BoogieTranslator took 276.29ms. Allocated memory is still 136.3MB. Free memory was 92.3MB in the beginning and 81.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-21 21:01:19,697 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 98.6MB. Free memory is still 48.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 276.29ms. Allocated memory is still 136.3MB. Free memory was 92.3MB in the beginning and 81.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 151]: 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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 21:01:22,234 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 21:01:22,363 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-21 21:01:22,371 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 21:01:22,374 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 21:01:22,438 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 21:01:22,439 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 21:01:22,440 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 21:01:22,442 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 21:01:22,447 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 21:01:22,448 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 21:01:22,449 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 21:01:22,449 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 21:01:22,451 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 21:01:22,452 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 21:01:22,452 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 21:01:22,453 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 21:01:22,453 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 21:01:22,453 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 21:01:22,455 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 21:01:22,455 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 21:01:22,456 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 21:01:22,456 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 21:01:22,457 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-21 21:01:22,457 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-21 21:01:22,457 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 21:01:22,458 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 21:01:22,458 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 21:01:22,459 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 21:01:22,460 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 21:01:22,461 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 21:01:22,462 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 21:01:22,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:01:22,463 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 21:01:22,463 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 21:01:22,463 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-21 21:01:22,463 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-21 21:01:22,464 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 21:01:22,464 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 21:01:22,465 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 21:01:22,465 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 21:01:22,466 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-21 21:01:22,466 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_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362ca5c35cce683744d8d619a442f154ce469608d45ae43ff282ddf886694959 [2023-11-21 21:01:22,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 21:01:22,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 21:01:22,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 21:01:22,921 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 21:01:22,922 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 21:01:22,924 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2023-11-21 21:01:26,020 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 21:01:26,323 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 21:01:26,327 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2023-11-21 21:01:26,339 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/data/01542b8d6/e68ad7d6fd2b4799b52875cb65c291b6/FLAGc9ee5e409 [2023-11-21 21:01:26,602 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/data/01542b8d6/e68ad7d6fd2b4799b52875cb65c291b6 [2023-11-21 21:01:26,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 21:01:26,609 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 21:01:26,613 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 21:01:26,613 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 21:01:26,618 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 21:01:26,619 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:01:26" (1/1) ... [2023-11-21 21:01:26,620 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20c142c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:26, skipping insertion in model container [2023-11-21 21:01:26,620 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:01:26" (1/1) ... [2023-11-21 21:01:26,665 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 21:01:26,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:01:26,941 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-21 21:01:26,946 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 21:01:26,993 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:01:27,007 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 21:01:27,094 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:01:27,116 INFO L206 MainTranslator]: Completed translation [2023-11-21 21:01:27,117 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:27 WrapperNode [2023-11-21 21:01:27,117 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 21:01:27,123 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 21:01:27,123 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 21:01:27,124 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 21:01:27,129 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:27" (1/1) ... [2023-11-21 21:01:27,143 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:27" (1/1) ... [2023-11-21 21:01:27,181 INFO L138 Inliner]: procedures = 28, calls = 45, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 302 [2023-11-21 21:01:27,181 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 21:01:27,182 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 21:01:27,182 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 21:01:27,182 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 21:01:27,192 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:27" (1/1) ... [2023-11-21 21:01:27,192 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:27" (1/1) ... [2023-11-21 21:01:27,201 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:27" (1/1) ... [2023-11-21 21:01:27,201 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:27" (1/1) ... [2023-11-21 21:01:27,216 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:27" (1/1) ... [2023-11-21 21:01:27,236 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:27" (1/1) ... [2023-11-21 21:01:27,239 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:27" (1/1) ... [2023-11-21 21:01:27,242 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:27" (1/1) ... [2023-11-21 21:01:27,262 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 21:01:27,263 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 21:01:27,263 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 21:01:27,263 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 21:01:27,264 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:27" (1/1) ... [2023-11-21 21:01:27,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:01:27,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:01:27,295 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 21:01:27,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 21:01:27,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 21:01:27,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-21 21:01:27,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 21:01:27,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-21 21:01:27,330 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-21 21:01:27,330 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-21 21:01:27,330 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-21 21:01:27,330 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-21 21:01:27,331 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-21 21:01:27,331 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-21 21:01:27,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 21:01:27,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 21:01:27,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 21:01:27,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 21:01:27,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-21 21:01:27,333 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 21:01:27,475 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 21:01:27,478 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 21:01:28,285 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 21:01:28,923 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 21:01:28,923 INFO L308 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-21 21:01:28,925 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:01:28 BoogieIcfgContainer [2023-11-21 21:01:28,925 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 21:01:28,927 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 21:01:28,927 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 21:01:28,931 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 21:01:28,931 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:01:26" (1/3) ... [2023-11-21 21:01:28,932 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee6905b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:01:28, skipping insertion in model container [2023-11-21 21:01:28,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:01:27" (2/3) ... [2023-11-21 21:01:28,933 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ee6905b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:01:28, skipping insertion in model container [2023-11-21 21:01:28,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:01:28" (3/3) ... [2023-11-21 21:01:28,934 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2023-11-21 21:01:28,955 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 21:01:28,955 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-11-21 21:01:28,955 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 21:01:29,052 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-21 21:01:29,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 70 transitions, 161 flow [2023-11-21 21:01:29,150 INFO L124 PetriNetUnfolderBase]: 7/67 cut-off events. [2023-11-21 21:01:29,151 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-21 21:01:29,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 67 events. 7/67 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 125 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2023-11-21 21:01:29,156 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 70 transitions, 161 flow [2023-11-21 21:01:29,161 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 66 transitions, 150 flow [2023-11-21 21:01:29,171 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 21:01:29,178 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;@242cb47a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 21:01:29,178 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-11-21 21:01:29,182 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 21:01:29,183 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-21 21:01:29,183 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 21:01:29,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:01:29,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 21:01:29,184 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 21:01:29,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:29,190 INFO L85 PathProgramCache]: Analyzing trace with hash 901133, now seen corresponding path program 1 times [2023-11-21 21:01:29,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:01:29,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154336674] [2023-11-21 21:01:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:29,204 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 [2023-11-21 21:01:29,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:01:29,211 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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) [2023-11-21 21:01:29,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:29,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 21:01:29,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:29,446 INFO L378 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 7 [2023-11-21 21:01:29,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:29,465 INFO L378 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 [2023-11-21 21:01:29,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:29,473 INFO L378 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 [2023-11-21 21:01:29,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:29,483 INFO L378 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 [2023-11-21 21:01:29,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:29,492 INFO L378 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 [2023-11-21 21:01:29,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:29,502 INFO L378 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 [2023-11-21 21:01:29,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:29,519 INFO L378 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 [2023-11-21 21:01:29,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:29,537 INFO L378 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 [2023-11-21 21:01:29,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:29,545 INFO L378 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 [2023-11-21 21:01:29,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:29,555 INFO L378 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 [2023-11-21 21:01:29,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:29,563 INFO L378 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 [2023-11-21 21:01:29,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:29,573 INFO L378 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 [2023-11-21 21:01:29,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:29,584 INFO L378 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 [2023-11-21 21:01:29,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:29,593 INFO L378 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 [2023-11-21 21:01:29,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:29,615 INFO L378 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 [2023-11-21 21:01:29,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:29,626 INFO L378 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 [2023-11-21 21:01:29,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:29,638 INFO L378 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 [2023-11-21 21:01:29,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:29,647 INFO L378 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 [2023-11-21 21:01:29,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:29,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-21 21:01:29,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:29,735 INFO L378 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 [2023-11-21 21:01:29,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:29,757 INFO L378 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 [2023-11-21 21:01:29,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:29,768 INFO L378 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 [2023-11-21 21:01:29,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:29,784 INFO L378 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 [2023-11-21 21:01:29,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:29,801 INFO L378 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 [2023-11-21 21:01:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:01:29,811 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:01:29,812 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:01:29,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154336674] [2023-11-21 21:01:29,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154336674] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:29,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:01:29,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 21:01:29,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198905233] [2023-11-21 21:01:29,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:29,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:01:29,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:01:29,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:01:29,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:01:29,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 70 [2023-11-21 21:01:29,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2023-11-21 21:01:29,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:01:29,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 70 [2023-11-21 21:01:29,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:01:30,508 INFO L124 PetriNetUnfolderBase]: 792/1499 cut-off events. [2023-11-21 21:01:30,508 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2023-11-21 21:01:30,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2734 conditions, 1499 events. 792/1499 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 8858 event pairs, 608 based on Foata normal form. 184/1313 useless extension candidates. Maximal degree in co-relation 2465. Up to 1135 conditions per place. [2023-11-21 21:01:30,529 INFO L140 encePairwiseOnDemand]: 63/70 looper letters, 27 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-11-21 21:01:30,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 60 transitions, 196 flow [2023-11-21 21:01:30,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:01:30,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:01:30,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2023-11-21 21:01:30,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6619047619047619 [2023-11-21 21:01:30,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 139 transitions. [2023-11-21 21:01:30,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 139 transitions. [2023-11-21 21:01:30,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:01:30,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 139 transitions. [2023-11-21 21:01:30,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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) [2023-11-21 21:01:30,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 21:01:30,557 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 21:01:30,559 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 150 flow. Second operand 3 states and 139 transitions. [2023-11-21 21:01:30,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 60 transitions, 196 flow [2023-11-21 21:01:30,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 60 transitions, 184 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-21 21:01:30,569 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 130 flow [2023-11-21 21:01:30,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2023-11-21 21:01:30,575 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -7 predicate places. [2023-11-21 21:01:30,575 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 130 flow [2023-11-21 21:01:30,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2023-11-21 21:01:30,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:01:30,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 21:01:30,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:30,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:30,779 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 21:01:30,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:30,780 INFO L85 PathProgramCache]: Analyzing trace with hash 901134, now seen corresponding path program 1 times [2023-11-21 21:01:30,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:01:30,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350263624] [2023-11-21 21:01:30,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:30,782 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 [2023-11-21 21:01:30,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:01:30,783 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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) [2023-11-21 21:01:30,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:30,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-21 21:01:30,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:30,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 21:01:30,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:30,929 INFO L378 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 [2023-11-21 21:01:30,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:30,942 INFO L378 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 [2023-11-21 21:01:30,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:30,949 INFO L378 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 [2023-11-21 21:01:30,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:30,972 INFO L378 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 [2023-11-21 21:01:30,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:30,992 INFO L378 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 [2023-11-21 21:01:31,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:31,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-21 21:01:31,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:31,063 INFO L378 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 [2023-11-21 21:01:31,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:31,093 INFO L378 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 [2023-11-21 21:01:31,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:31,109 INFO L378 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 [2023-11-21 21:01:31,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:31,135 INFO L378 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 [2023-11-21 21:01:31,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:31,149 INFO L378 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 [2023-11-21 21:01:31,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:31,168 INFO L378 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 [2023-11-21 21:01:31,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:31,192 INFO L378 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 [2023-11-21 21:01:31,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:31,205 INFO L378 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 [2023-11-21 21:01:31,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:31,212 INFO L378 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 [2023-11-21 21:01:31,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:31,226 INFO L378 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 [2023-11-21 21:01:31,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:31,234 INFO L378 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 [2023-11-21 21:01:31,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:31,258 INFO L378 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 [2023-11-21 21:01:31,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:31,272 INFO L378 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 [2023-11-21 21:01:31,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:31,281 INFO L378 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 [2023-11-21 21:01:31,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:31,292 INFO L378 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 [2023-11-21 21:01:31,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:31,307 INFO L378 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 [2023-11-21 21:01:31,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:31,315 INFO L378 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 [2023-11-21 21:01:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:01:31,343 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:01:31,343 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:01:31,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350263624] [2023-11-21 21:01:31,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350263624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:31,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:01:31,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 21:01:31,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305279376] [2023-11-21 21:01:31,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:31,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:01:31,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:01:31,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:01:31,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:01:31,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 70 [2023-11-21 21:01:31,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2023-11-21 21:01:31,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:01:31,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 70 [2023-11-21 21:01:31,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:01:31,950 INFO L124 PetriNetUnfolderBase]: 793/1502 cut-off events. [2023-11-21 21:01:31,951 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-21 21:01:31,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2680 conditions, 1502 events. 793/1502 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8840 event pairs, 608 based on Foata normal form. 0/1132 useless extension candidates. Maximal degree in co-relation 2658. Up to 1140 conditions per place. [2023-11-21 21:01:31,968 INFO L140 encePairwiseOnDemand]: 66/70 looper letters, 30 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2023-11-21 21:01:31,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 63 transitions, 204 flow [2023-11-21 21:01:31,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:01:31,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:01:31,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2023-11-21 21:01:31,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6619047619047619 [2023-11-21 21:01:31,976 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 139 transitions. [2023-11-21 21:01:31,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 139 transitions. [2023-11-21 21:01:31,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:01:31,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 139 transitions. [2023-11-21 21:01:31,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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) [2023-11-21 21:01:31,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 21:01:31,985 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 21:01:31,985 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 130 flow. Second operand 3 states and 139 transitions. [2023-11-21 21:01:31,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 63 transitions, 204 flow [2023-11-21 21:01:31,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 63 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 21:01:31,990 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 145 flow [2023-11-21 21:01:31,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2023-11-21 21:01:31,992 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -6 predicate places. [2023-11-21 21:01:31,992 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 145 flow [2023-11-21 21:01:31,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2023-11-21 21:01:31,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:01:31,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 21:01:32,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:32,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:32,196 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 21:01:32,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:32,196 INFO L85 PathProgramCache]: Analyzing trace with hash 901212, now seen corresponding path program 1 times [2023-11-21 21:01:32,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:01:32,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111829814] [2023-11-21 21:01:32,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:32,198 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 [2023-11-21 21:01:32,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:01:32,199 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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) [2023-11-21 21:01:32,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:32,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 21:01:32,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:01:32,305 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:01:32,305 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:01:32,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111829814] [2023-11-21 21:01:32,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111829814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:32,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:01:32,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 21:01:32,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50828616] [2023-11-21 21:01:32,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:32,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:01:32,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:01:32,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:01:32,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:01:32,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 70 [2023-11-21 21:01:32,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2023-11-21 21:01:32,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:01:32,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 70 [2023-11-21 21:01:32,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:01:32,726 INFO L124 PetriNetUnfolderBase]: 792/1501 cut-off events. [2023-11-21 21:01:32,726 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-21 21:01:32,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2681 conditions, 1501 events. 792/1501 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8833 event pairs, 608 based on Foata normal form. 1/1133 useless extension candidates. Maximal degree in co-relation 2668. Up to 1138 conditions per place. [2023-11-21 21:01:32,741 INFO L140 encePairwiseOnDemand]: 67/70 looper letters, 29 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-11-21 21:01:32,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 62 transitions, 204 flow [2023-11-21 21:01:32,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:01:32,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:01:32,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2023-11-21 21:01:32,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-21 21:01:32,744 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 140 transitions. [2023-11-21 21:01:32,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 140 transitions. [2023-11-21 21:01:32,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:01:32,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 140 transitions. [2023-11-21 21:01:32,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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) [2023-11-21 21:01:32,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 21:01:32,747 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 21:01:32,747 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 145 flow. Second operand 3 states and 140 transitions. [2023-11-21 21:01:32,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 62 transitions, 204 flow [2023-11-21 21:01:32,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 62 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 21:01:32,750 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 142 flow [2023-11-21 21:01:32,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2023-11-21 21:01:32,751 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -5 predicate places. [2023-11-21 21:01:32,751 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 142 flow [2023-11-21 21:01:32,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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) [2023-11-21 21:01:32,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:01:32,752 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-21 21:01:32,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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)] Forceful destruction successful, exit code 0 [2023-11-21 21:01:32,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:32,964 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 21:01:32,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:32,965 INFO L85 PathProgramCache]: Analyzing trace with hash 866019281, now seen corresponding path program 1 times [2023-11-21 21:01:32,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:01:32,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825198759] [2023-11-21 21:01:32,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:32,966 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 [2023-11-21 21:01:32,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:01:32,967 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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) [2023-11-21 21:01:32,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:33,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 21:01:33,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:33,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 21:01:33,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:33,120 INFO L378 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 [2023-11-21 21:01:33,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:33,143 INFO L378 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 [2023-11-21 21:01:33,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:33,153 INFO L378 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 [2023-11-21 21:01:33,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:33,160 INFO L378 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 [2023-11-21 21:01:33,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:33,168 INFO L378 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 [2023-11-21 21:01:33,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:33,181 INFO L378 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 [2023-11-21 21:01:33,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:33,187 INFO L378 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 [2023-11-21 21:01:33,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:33,207 INFO L378 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 [2023-11-21 21:01:33,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:33,216 INFO L378 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 [2023-11-21 21:01:33,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:33,227 INFO L378 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 [2023-11-21 21:01:33,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:33,236 INFO L378 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 [2023-11-21 21:01:33,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:33,249 INFO L378 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 [2023-11-21 21:01:33,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:33,255 INFO L378 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 [2023-11-21 21:01:33,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:33,271 INFO L378 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 [2023-11-21 21:01:33,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:33,285 INFO L378 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 [2023-11-21 21:01:33,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:33,304 INFO L378 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 [2023-11-21 21:01:33,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:33,315 INFO L378 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 [2023-11-21 21:01:33,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:33,350 INFO L378 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 [2023-11-21 21:01:33,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:33,360 INFO L378 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 [2023-11-21 21:01:33,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:33,372 INFO L378 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 [2023-11-21 21:01:33,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:33,387 INFO L378 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 [2023-11-21 21:01:33,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:33,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-21 21:01:33,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:33,446 INFO L378 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 [2023-11-21 21:01:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:01:33,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:01:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:01:33,681 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:01:33,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825198759] [2023-11-21 21:01:33,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825198759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:01:33,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 21:01:33,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-21 21:01:33,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966803845] [2023-11-21 21:01:33,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 21:01:33,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 21:01:33,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:01:33,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 21:01:33,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-21 21:01:34,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 70 [2023-11-21 21:01:34,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 36.666666666666664) internal successors, (220), 6 states have internal predecessors, (220), 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) [2023-11-21 21:01:34,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:01:34,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 70 [2023-11-21 21:01:34,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:01:35,198 INFO L124 PetriNetUnfolderBase]: 794/1507 cut-off events. [2023-11-21 21:01:35,198 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-21 21:01:35,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2699 conditions, 1507 events. 794/1507 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8853 event pairs, 608 based on Foata normal form. 0/1137 useless extension candidates. Maximal degree in co-relation 2685. Up to 1141 conditions per place. [2023-11-21 21:01:35,213 INFO L140 encePairwiseOnDemand]: 66/70 looper letters, 32 selfloop transitions, 6 changer transitions 0/68 dead transitions. [2023-11-21 21:01:35,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 240 flow [2023-11-21 21:01:35,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 21:01:35,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 21:01:35,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 215 transitions. [2023-11-21 21:01:35,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2023-11-21 21:01:35,218 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 215 transitions. [2023-11-21 21:01:35,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 215 transitions. [2023-11-21 21:01:35,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:01:35,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 215 transitions. [2023-11-21 21:01:35,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 43.0) internal successors, (215), 5 states have internal predecessors, (215), 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) [2023-11-21 21:01:35,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 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) [2023-11-21 21:01:35,228 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 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) [2023-11-21 21:01:35,229 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 142 flow. Second operand 5 states and 215 transitions. [2023-11-21 21:01:35,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 240 flow [2023-11-21 21:01:35,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 236 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 21:01:35,235 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 180 flow [2023-11-21 21:01:35,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=180, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2023-11-21 21:01:35,237 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -1 predicate places. [2023-11-21 21:01:35,237 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 180 flow [2023-11-21 21:01:35,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 36.666666666666664) internal successors, (220), 6 states have internal predecessors, (220), 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) [2023-11-21 21:01:35,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:01:35,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 21:01:35,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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)] Forceful destruction successful, exit code 0 [2023-11-21 21:01:35,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:35,441 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 21:01:35,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:35,442 INFO L85 PathProgramCache]: Analyzing trace with hash 866019359, now seen corresponding path program 1 times [2023-11-21 21:01:35,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:01:35,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140226905] [2023-11-21 21:01:35,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:35,442 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 [2023-11-21 21:01:35,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:01:35,444 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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) [2023-11-21 21:01:35,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:35,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 21:01:35,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:01:35,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:01:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:01:35,621 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:01:35,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140226905] [2023-11-21 21:01:35,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [140226905] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:01:35,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 21:01:35,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-21 21:01:35,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884603222] [2023-11-21 21:01:35,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 21:01:35,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 21:01:35,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:01:35,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 21:01:35,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-21 21:01:35,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 70 [2023-11-21 21:01:35,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 180 flow. Second operand has 6 states, 6 states have (on average 37.333333333333336) internal successors, (224), 6 states have internal predecessors, (224), 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) [2023-11-21 21:01:35,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:01:35,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 70 [2023-11-21 21:01:35,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:01:36,104 INFO L124 PetriNetUnfolderBase]: 792/1505 cut-off events. [2023-11-21 21:01:36,104 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2023-11-21 21:01:36,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2702 conditions, 1505 events. 792/1505 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8773 event pairs, 608 based on Foata normal form. 2/1138 useless extension candidates. Maximal degree in co-relation 2675. Up to 1137 conditions per place. [2023-11-21 21:01:36,120 INFO L140 encePairwiseOnDemand]: 66/70 looper letters, 29 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2023-11-21 21:01:36,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 66 transitions, 242 flow [2023-11-21 21:01:36,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 21:01:36,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 21:01:36,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 216 transitions. [2023-11-21 21:01:36,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6171428571428571 [2023-11-21 21:01:36,123 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 216 transitions. [2023-11-21 21:01:36,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 216 transitions. [2023-11-21 21:01:36,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:01:36,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 216 transitions. [2023-11-21 21:01:36,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 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) [2023-11-21 21:01:36,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 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) [2023-11-21 21:01:36,126 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 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) [2023-11-21 21:01:36,127 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 180 flow. Second operand 5 states and 216 transitions. [2023-11-21 21:01:36,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 66 transitions, 242 flow [2023-11-21 21:01:36,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 66 transitions, 236 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-21 21:01:36,130 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 180 flow [2023-11-21 21:01:36,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=180, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2023-11-21 21:01:36,131 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 3 predicate places. [2023-11-21 21:01:36,131 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 180 flow [2023-11-21 21:01:36,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 37.333333333333336) internal successors, (224), 6 states have internal predecessors, (224), 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) [2023-11-21 21:01:36,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:01:36,132 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1] [2023-11-21 21:01:36,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:36,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:36,335 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 21:01:36,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:36,336 INFO L85 PathProgramCache]: Analyzing trace with hash -314230505, now seen corresponding path program 2 times [2023-11-21 21:01:36,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:01:36,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508003200] [2023-11-21 21:01:36,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 21:01:36,336 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 [2023-11-21 21:01:36,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:01:36,338 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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) [2023-11-21 21:01:36,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:36,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 21:01:36,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 21:01:36,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 21:01:36,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:36,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 21:01:36,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:36,520 INFO L378 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 [2023-11-21 21:01:36,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:36,531 INFO L378 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 [2023-11-21 21:01:36,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:36,540 INFO L378 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 [2023-11-21 21:01:36,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:36,554 INFO L378 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 [2023-11-21 21:01:36,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:36,578 INFO L378 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 [2023-11-21 21:01:36,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:36,602 INFO L378 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 [2023-11-21 21:01:36,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:36,613 INFO L378 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 [2023-11-21 21:01:36,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:36,625 INFO L378 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 [2023-11-21 21:01:36,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:36,632 INFO L378 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 [2023-11-21 21:01:36,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:36,644 INFO L378 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 [2023-11-21 21:01:36,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:36,651 INFO L378 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 [2023-11-21 21:01:36,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:36,677 INFO L378 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 [2023-11-21 21:01:36,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:36,690 INFO L378 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 [2023-11-21 21:01:36,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:36,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-21 21:01:36,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:36,746 INFO L378 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 [2023-11-21 21:01:36,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:36,769 INFO L378 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 [2023-11-21 21:01:36,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:36,780 INFO L378 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 [2023-11-21 21:01:36,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:36,791 INFO L378 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 [2023-11-21 21:01:36,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:36,801 INFO L378 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 [2023-11-21 21:01:36,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:36,828 INFO L378 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 [2023-11-21 21:01:36,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:36,842 INFO L378 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 [2023-11-21 21:01:36,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:36,855 INFO L378 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 [2023-11-21 21:01:36,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:36,862 INFO L378 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 [2023-11-21 21:01:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:01:37,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:01:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:01:37,704 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:01:37,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508003200] [2023-11-21 21:01:37,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508003200] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:01:37,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 21:01:37,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-21 21:01:37,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558204017] [2023-11-21 21:01:37,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 21:01:37,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 21:01:37,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:01:37,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 21:01:37,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-11-21 21:01:39,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 70 [2023-11-21 21:01:39,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 64 transitions, 180 flow. Second operand has 11 states, 11 states have (on average 36.63636363636363) internal successors, (403), 11 states have internal predecessors, (403), 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) [2023-11-21 21:01:39,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:01:39,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 70 [2023-11-21 21:01:39,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:01:40,773 INFO L124 PetriNetUnfolderBase]: 791/1502 cut-off events. [2023-11-21 21:01:40,773 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-21 21:01:40,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2698 conditions, 1502 events. 791/1502 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8776 event pairs, 608 based on Foata normal form. 1/1134 useless extension candidates. Maximal degree in co-relation 2670. Up to 1135 conditions per place. [2023-11-21 21:01:40,786 INFO L140 encePairwiseOnDemand]: 66/70 looper letters, 28 selfloop transitions, 5 changer transitions 0/63 dead transitions. [2023-11-21 21:01:40,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 63 transitions, 232 flow [2023-11-21 21:01:40,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 21:01:40,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 21:01:40,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 244 transitions. [2023-11-21 21:01:40,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2023-11-21 21:01:40,792 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 244 transitions. [2023-11-21 21:01:40,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 244 transitions. [2023-11-21 21:01:40,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:01:40,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 244 transitions. [2023-11-21 21:01:40,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 40.666666666666664) internal successors, (244), 6 states have internal predecessors, (244), 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) [2023-11-21 21:01:40,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 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) [2023-11-21 21:01:40,795 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 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) [2023-11-21 21:01:40,795 INFO L175 Difference]: Start difference. First operand has 72 places, 64 transitions, 180 flow. Second operand 6 states and 244 transitions. [2023-11-21 21:01:40,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 63 transitions, 232 flow [2023-11-21 21:01:40,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 63 transitions, 216 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-11-21 21:01:40,798 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 152 flow [2023-11-21 21:01:40,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2023-11-21 21:01:40,799 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 0 predicate places. [2023-11-21 21:01:40,799 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 152 flow [2023-11-21 21:01:40,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 36.63636363636363) internal successors, (403), 11 states have internal predecessors, (403), 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) [2023-11-21 21:01:40,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:01:40,800 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1] [2023-11-21 21:01:40,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:41,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:41,003 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 21:01:41,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:41,003 INFO L85 PathProgramCache]: Analyzing trace with hash -314230427, now seen corresponding path program 2 times [2023-11-21 21:01:41,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:01:41,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972429880] [2023-11-21 21:01:41,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 21:01:41,004 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 [2023-11-21 21:01:41,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:01:41,005 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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) [2023-11-21 21:01:41,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:41,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-21 21:01:41,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 21:01:41,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 21:01:41,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:41,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:41,164 INFO L349 Elim1Store]: treesize reduction 60, result has 10.4 percent of original size [2023-11-21 21:01:41,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2023-11-21 21:01:41,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:41,203 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-21 21:01:41,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2023-11-21 21:01:41,240 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 21:01:41,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-21 21:01:41,277 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-21 21:01:41,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-21 21:01:41,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:41,316 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-21 21:01:41,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2023-11-21 21:01:41,341 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 21:01:41,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-21 21:01:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 21:01:41,876 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:01:41,876 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:01:41,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972429880] [2023-11-21 21:01:41,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972429880] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:41,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:01:41,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 21:01:41,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961463949] [2023-11-21 21:01:41,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:41,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:01:41,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:01:41,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:01:41,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:01:42,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 70 [2023-11-21 21:01:42,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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) [2023-11-21 21:01:42,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:01:42,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 70 [2023-11-21 21:01:42,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:01:42,505 INFO L124 PetriNetUnfolderBase]: 1166/2029 cut-off events. [2023-11-21 21:01:42,505 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-21 21:01:42,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3720 conditions, 2029 events. 1166/2029 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 11266 event pairs, 908 based on Foata normal form. 0/1576 useless extension candidates. Maximal degree in co-relation 3686. Up to 1642 conditions per place. [2023-11-21 21:01:42,525 INFO L140 encePairwiseOnDemand]: 67/70 looper letters, 32 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-11-21 21:01:42,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 59 transitions, 214 flow [2023-11-21 21:01:42,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:01:42,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:01:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-11-21 21:01:42,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2023-11-21 21:01:42,528 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-11-21 21:01:42,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-11-21 21:01:42,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:01:42,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-11-21 21:01:42,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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) [2023-11-21 21:01:42,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 21:01:42,531 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 21:01:42,531 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 152 flow. Second operand 3 states and 129 transitions. [2023-11-21 21:01:42,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 59 transitions, 214 flow [2023-11-21 21:01:42,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 202 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-11-21 21:01:42,534 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 138 flow [2023-11-21 21:01:42,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-11-21 21:01:42,535 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -5 predicate places. [2023-11-21 21:01:42,536 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 138 flow [2023-11-21 21:01:42,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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) [2023-11-21 21:01:42,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:01:42,536 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1] [2023-11-21 21:01:42,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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)] Ended with exit code 0 [2023-11-21 21:01:42,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:42,739 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 21:01:42,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:42,739 INFO L85 PathProgramCache]: Analyzing trace with hash -314230426, now seen corresponding path program 1 times [2023-11-21 21:01:42,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:01:42,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14310526] [2023-11-21 21:01:42,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:42,740 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 [2023-11-21 21:01:42,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:01:42,742 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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) [2023-11-21 21:01:42,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:42,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 21:01:42,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:42,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:42,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-21 21:01:42,950 INFO L378 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 14 treesize of output 11 [2023-11-21 21:01:42,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:42,970 INFO L378 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 9 treesize of output 11 [2023-11-21 21:01:42,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:42,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-21 21:01:42,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:42,998 INFO L378 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 9 treesize of output 11 [2023-11-21 21:01:43,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:43,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-21 21:01:43,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:43,054 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-21 21:01:43,055 INFO L378 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 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-21 21:01:43,065 INFO L378 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 [2023-11-21 21:01:43,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:43,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:43,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:43,156 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-21 21:01:43,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-11-21 21:01:43,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:43,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-21 21:01:43,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:43,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:43,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-21 21:01:43,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:43,254 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-21 21:01:43,255 INFO L378 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 1 case distinctions, treesize of input 14 treesize of output 11 [2023-11-21 21:01:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 21:01:43,671 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:01:43,671 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:01:43,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14310526] [2023-11-21 21:01:43,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14310526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:43,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:01:43,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 21:01:43,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974658981] [2023-11-21 21:01:43,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:43,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:01:43,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:01:43,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:01:43,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:01:43,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 70 [2023-11-21 21:01:43,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2023-11-21 21:01:43,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:01:43,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 70 [2023-11-21 21:01:43,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:01:44,221 INFO L124 PetriNetUnfolderBase]: 791/1450 cut-off events. [2023-11-21 21:01:44,222 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-21 21:01:44,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2634 conditions, 1450 events. 791/1450 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8101 event pairs, 608 based on Foata normal form. 126/1259 useless extension candidates. Maximal degree in co-relation 2626. Up to 1141 conditions per place. [2023-11-21 21:01:44,235 INFO L140 encePairwiseOnDemand]: 67/70 looper letters, 30 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-11-21 21:01:44,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 196 flow [2023-11-21 21:01:44,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:01:44,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:01:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2023-11-21 21:01:44,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2023-11-21 21:01:44,237 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 133 transitions. [2023-11-21 21:01:44,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 133 transitions. [2023-11-21 21:01:44,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:01:44,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 133 transitions. [2023-11-21 21:01:44,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 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) [2023-11-21 21:01:44,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 21:01:44,239 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 21:01:44,240 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 138 flow. Second operand 3 states and 133 transitions. [2023-11-21 21:01:44,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 196 flow [2023-11-21 21:01:44,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 21:01:44,243 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 135 flow [2023-11-21 21:01:44,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=61, 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=135, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2023-11-21 21:01:44,247 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -6 predicate places. [2023-11-21 21:01:44,247 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 135 flow [2023-11-21 21:01:44,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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) [2023-11-21 21:01:44,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:01:44,248 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2023-11-21 21:01:44,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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)] Ended with exit code 0 [2023-11-21 21:01:44,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:44,452 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 21:01:44,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:44,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1790957696, now seen corresponding path program 1 times [2023-11-21 21:01:44,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:01:44,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729978136] [2023-11-21 21:01:44,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:44,453 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 [2023-11-21 21:01:44,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:01:44,455 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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) [2023-11-21 21:01:44,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:44,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:44,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 21:01:44,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:44,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:44,682 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-21 21:01:44,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-11-21 21:01:44,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:44,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-21 21:01:44,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:44,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:44,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2023-11-21 21:01:44,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:44,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:44,762 INFO L378 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 5 treesize of output 3 [2023-11-21 21:01:44,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:44,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:44,814 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-21 21:01:44,814 INFO L378 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 1 case distinctions, treesize of input 14 treesize of output 11 [2023-11-21 21:01:44,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:44,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:44,856 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-21 21:01:44,857 INFO L378 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 1 case distinctions, treesize of input 9 treesize of output 11 [2023-11-21 21:01:44,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:44,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:44,910 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-21 21:01:44,911 INFO L378 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 1 case distinctions, treesize of input 14 treesize of output 11 [2023-11-21 21:01:44,919 INFO L378 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 [2023-11-21 21:01:44,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:44,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:44,941 INFO L378 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 9 treesize of output 11 [2023-11-21 21:01:44,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:44,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-21 21:01:44,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:44,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:45,000 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-21 21:01:45,000 INFO L378 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 1 case distinctions, treesize of input 14 treesize of output 11 [2023-11-21 21:01:45,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:45,012 INFO L378 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 [2023-11-21 21:01:45,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:45,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:45,034 INFO L378 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 9 treesize of output 11 [2023-11-21 21:01:45,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 21:01:45,483 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:01:45,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:01:45,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729978136] [2023-11-21 21:01:45,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729978136] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:45,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:01:45,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 21:01:45,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411867021] [2023-11-21 21:01:45,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:45,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:01:45,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:01:45,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:01:45,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:01:45,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 70 [2023-11-21 21:01:45,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2023-11-21 21:01:45,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:01:45,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 70 [2023-11-21 21:01:45,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:01:46,000 INFO L124 PetriNetUnfolderBase]: 791/1441 cut-off events. [2023-11-21 21:01:46,001 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-21 21:01:46,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2626 conditions, 1441 events. 791/1441 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8033 event pairs, 608 based on Foata normal form. 25/1158 useless extension candidates. Maximal degree in co-relation 2617. Up to 1141 conditions per place. [2023-11-21 21:01:46,022 INFO L140 encePairwiseOnDemand]: 67/70 looper letters, 30 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-11-21 21:01:46,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 55 transitions, 193 flow [2023-11-21 21:01:46,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:01:46,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:01:46,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2023-11-21 21:01:46,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2023-11-21 21:01:46,025 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 133 transitions. [2023-11-21 21:01:46,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 133 transitions. [2023-11-21 21:01:46,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:01:46,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 133 transitions. [2023-11-21 21:01:46,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 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) [2023-11-21 21:01:46,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 21:01:46,027 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 21:01:46,027 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 135 flow. Second operand 3 states and 133 transitions. [2023-11-21 21:01:46,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 55 transitions, 193 flow [2023-11-21 21:01:46,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 21:01:46,031 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 132 flow [2023-11-21 21:01:46,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, 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=132, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2023-11-21 21:01:46,033 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -7 predicate places. [2023-11-21 21:01:46,033 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 132 flow [2023-11-21 21:01:46,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2023-11-21 21:01:46,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:01:46,034 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2023-11-21 21:01:46,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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)] Ended with exit code 0 [2023-11-21 21:01:46,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:46,237 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 21:01:46,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:46,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1790957695, now seen corresponding path program 1 times [2023-11-21 21:01:46,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:01:46,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004325520] [2023-11-21 21:01:46,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:46,239 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 [2023-11-21 21:01:46,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:01:46,240 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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) [2023-11-21 21:01:46,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:46,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 21:01:46,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:46,451 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-21 21:01:46,452 INFO L378 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 22 treesize of output 22 [2023-11-21 21:01:46,476 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 21:01:46,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2023-11-21 21:01:46,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:46,515 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 21:01:46,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-21 21:01:46,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:46,570 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-21 21:01:46,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-21 21:01:46,607 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-21 21:01:46,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-21 21:01:46,629 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 21:01:46,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2023-11-21 21:01:46,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:46,665 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-21 21:01:46,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-21 21:01:46,686 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 21:01:46,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2023-11-21 21:01:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 21:01:47,149 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:01:47,149 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:01:47,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004325520] [2023-11-21 21:01:47,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004325520] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:47,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:01:47,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 21:01:47,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544117084] [2023-11-21 21:01:47,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:47,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:01:47,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:01:47,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:01:47,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:01:47,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 70 [2023-11-21 21:01:47,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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) [2023-11-21 21:01:47,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:01:47,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 70 [2023-11-21 21:01:47,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:01:47,614 INFO L124 PetriNetUnfolderBase]: 846/1536 cut-off events. [2023-11-21 21:01:47,614 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-21 21:01:47,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2807 conditions, 1536 events. 846/1536 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8461 event pairs, 652 based on Foata normal form. 0/1210 useless extension candidates. Maximal degree in co-relation 2797. Up to 1226 conditions per place. [2023-11-21 21:01:47,623 INFO L140 encePairwiseOnDemand]: 67/70 looper letters, 32 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-11-21 21:01:47,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 53 transitions, 194 flow [2023-11-21 21:01:47,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:01:47,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:01:47,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-11-21 21:01:47,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2023-11-21 21:01:47,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-11-21 21:01:47,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-11-21 21:01:47,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:01:47,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-11-21 21:01:47,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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) [2023-11-21 21:01:47,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 21:01:47,628 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 21:01:47,628 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 132 flow. Second operand 3 states and 129 transitions. [2023-11-21 21:01:47,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 53 transitions, 194 flow [2023-11-21 21:01:47,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 53 transitions, 193 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 21:01:47,630 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 129 flow [2023-11-21 21:01:47,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=59, 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=129, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2023-11-21 21:01:47,632 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -8 predicate places. [2023-11-21 21:01:47,632 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 129 flow [2023-11-21 21:01:47,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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) [2023-11-21 21:01:47,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:01:47,633 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:01:47,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:47,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:47,836 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 21:01:47,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:47,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1170978100, now seen corresponding path program 1 times [2023-11-21 21:01:47,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:01:47,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [701836078] [2023-11-21 21:01:47,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:47,837 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 [2023-11-21 21:01:47,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:01:47,838 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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) [2023-11-21 21:01:47,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:47,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:47,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 21:01:47,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:47,954 INFO L378 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 [2023-11-21 21:01:47,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:47,961 INFO L378 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 [2023-11-21 21:01:47,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:47,968 INFO L378 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 [2023-11-21 21:01:47,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:47,972 INFO L378 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 [2023-11-21 21:01:47,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:47,981 INFO L378 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 [2023-11-21 21:01:47,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:47,997 INFO L378 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 [2023-11-21 21:01:48,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:48,006 INFO L378 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 [2023-11-21 21:01:48,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:48,020 INFO L378 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 [2023-11-21 21:01:48,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:48,025 INFO L378 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 [2023-11-21 21:01:48,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:48,033 INFO L378 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 [2023-11-21 21:01:48,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:48,040 INFO L378 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 [2023-11-21 21:01:48,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:48,045 INFO L378 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 [2023-11-21 21:01:48,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:48,062 INFO L378 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 [2023-11-21 21:01:48,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:48,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-21 21:01:48,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:48,100 INFO L378 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 [2023-11-21 21:01:48,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:48,107 INFO L378 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 [2023-11-21 21:01:48,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:48,123 INFO L378 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 [2023-11-21 21:01:48,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:48,130 INFO L378 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 [2023-11-21 21:01:48,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:48,147 INFO L378 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 [2023-11-21 21:01:48,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:48,155 INFO L378 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 [2023-11-21 21:01:48,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:48,163 INFO L378 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 [2023-11-21 21:01:48,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:48,168 INFO L378 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 [2023-11-21 21:01:48,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:48,173 INFO L378 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 [2023-11-21 21:01:48,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:48,181 INFO L378 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 [2023-11-21 21:01:48,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 21:01:48,216 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:01:48,217 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:01:48,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [701836078] [2023-11-21 21:01:48,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [701836078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:48,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:01:48,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 21:01:48,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632479289] [2023-11-21 21:01:48,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:48,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 21:01:48,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:01:48,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 21:01:48,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 21:01:48,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 70 [2023-11-21 21:01:48,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2023-11-21 21:01:48,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:01:48,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 70 [2023-11-21 21:01:48,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:01:48,738 INFO L124 PetriNetUnfolderBase]: 791/1370 cut-off events. [2023-11-21 21:01:48,738 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-21 21:01:48,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2557 conditions, 1370 events. 791/1370 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7152 event pairs, 608 based on Foata normal form. 0/1133 useless extension candidates. Maximal degree in co-relation 2546. Up to 1134 conditions per place. [2023-11-21 21:01:48,747 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 29 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-11-21 21:01:48,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 185 flow [2023-11-21 21:01:48,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 21:01:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 21:01:48,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 160 transitions. [2023-11-21 21:01:48,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-21 21:01:48,751 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 160 transitions. [2023-11-21 21:01:48,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 160 transitions. [2023-11-21 21:01:48,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:01:48,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 160 transitions. [2023-11-21 21:01:48,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 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) [2023-11-21 21:01:48,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 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) [2023-11-21 21:01:48,753 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 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) [2023-11-21 21:01:48,753 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 129 flow. Second operand 4 states and 160 transitions. [2023-11-21 21:01:48,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 185 flow [2023-11-21 21:01:48,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 50 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 21:01:48,755 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 126 flow [2023-11-21 21:01:48,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=126, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2023-11-21 21:01:48,756 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -9 predicate places. [2023-11-21 21:01:48,757 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 126 flow [2023-11-21 21:01:48,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2023-11-21 21:01:48,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:01:48,757 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:01:48,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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)] Forceful destruction successful, exit code 0 [2023-11-21 21:01:48,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:48,961 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 21:01:48,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:48,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1170978099, now seen corresponding path program 1 times [2023-11-21 21:01:48,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:01:48,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685023659] [2023-11-21 21:01:48,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:48,962 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 [2023-11-21 21:01:48,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:01:48,967 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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) [2023-11-21 21:01:48,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:49,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-21 21:01:49,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:49,093 INFO L378 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 [2023-11-21 21:01:49,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:49,111 INFO L378 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 [2023-11-21 21:01:49,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:49,133 INFO L378 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 [2023-11-21 21:01:49,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:49,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-21 21:01:49,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:49,172 INFO L378 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 [2023-11-21 21:01:49,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:49,179 INFO L378 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 [2023-11-21 21:01:49,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:49,189 INFO L378 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 [2023-11-21 21:01:49,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:49,203 INFO L378 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 [2023-11-21 21:01:49,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:49,217 INFO L378 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 [2023-11-21 21:01:49,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:49,222 INFO L378 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 [2023-11-21 21:01:49,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:49,227 INFO L378 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 [2023-11-21 21:01:49,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:49,233 INFO L378 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 [2023-11-21 21:01:49,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:49,251 INFO L378 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 [2023-11-21 21:01:49,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:49,266 INFO L378 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 [2023-11-21 21:01:49,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:49,273 INFO L378 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 [2023-11-21 21:01:49,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:49,283 INFO L378 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 [2023-11-21 21:01:49,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:49,294 INFO L378 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 [2023-11-21 21:01:49,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:49,310 INFO L378 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 [2023-11-21 21:01:49,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:49,319 INFO L378 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 [2023-11-21 21:01:49,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:49,337 INFO L378 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 [2023-11-21 21:01:49,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:49,345 INFO L378 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 [2023-11-21 21:01:49,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:49,349 INFO L378 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 [2023-11-21 21:01:49,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:49,356 INFO L378 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 [2023-11-21 21:01:49,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:49,363 INFO L378 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 [2023-11-21 21:01:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 21:01:49,454 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:01:49,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:01:49,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685023659] [2023-11-21 21:01:49,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685023659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:49,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:01:49,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 21:01:49,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284675539] [2023-11-21 21:01:49,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:49,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 21:01:49,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:01:49,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 21:01:49,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 21:01:49,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 70 [2023-11-21 21:01:49,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 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) [2023-11-21 21:01:49,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:01:49,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 70 [2023-11-21 21:01:49,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:01:50,346 INFO L124 PetriNetUnfolderBase]: 1581/2645 cut-off events. [2023-11-21 21:01:50,346 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-11-21 21:01:50,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4996 conditions, 2645 events. 1581/2645 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15342 event pairs, 733 based on Foata normal form. 0/2162 useless extension candidates. Maximal degree in co-relation 4984. Up to 1343 conditions per place. [2023-11-21 21:01:50,362 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 51 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2023-11-21 21:01:50,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 73 transitions, 287 flow [2023-11-21 21:01:50,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 21:01:50,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 21:01:50,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 229 transitions. [2023-11-21 21:01:50,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6542857142857142 [2023-11-21 21:01:50,365 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 229 transitions. [2023-11-21 21:01:50,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 229 transitions. [2023-11-21 21:01:50,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:01:50,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 229 transitions. [2023-11-21 21:01:50,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 45.8) internal successors, (229), 5 states have internal predecessors, (229), 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) [2023-11-21 21:01:50,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 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) [2023-11-21 21:01:50,368 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 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) [2023-11-21 21:01:50,368 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 126 flow. Second operand 5 states and 229 transitions. [2023-11-21 21:01:50,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 73 transitions, 287 flow [2023-11-21 21:01:50,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 73 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 21:01:50,370 INFO L231 Difference]: Finished difference. Result has 63 places, 51 transitions, 139 flow [2023-11-21 21:01:50,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=139, PETRI_PLACES=63, PETRI_TRANSITIONS=51} [2023-11-21 21:01:50,371 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -6 predicate places. [2023-11-21 21:01:50,372 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 51 transitions, 139 flow [2023-11-21 21:01:50,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 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) [2023-11-21 21:01:50,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:01:50,372 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:01:50,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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)] Ended with exit code 0 [2023-11-21 21:01:50,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:50,575 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 21:01:50,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:50,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1957120538, now seen corresponding path program 1 times [2023-11-21 21:01:50,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:01:50,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843461444] [2023-11-21 21:01:50,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:50,576 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 [2023-11-21 21:01:50,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:01:50,577 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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) [2023-11-21 21:01:50,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:50,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 21:01:50,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:50,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:50,781 INFO L378 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 [2023-11-21 21:01:50,788 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 21:01:50,794 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 21:01:50,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:50,806 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 21:01:50,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:50,818 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 21:01:50,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:50,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:50,832 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 21:01:50,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:50,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:50,846 INFO L378 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 [2023-11-21 21:01:50,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:50,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:50,860 INFO L378 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 [2023-11-21 21:01:50,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:50,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:50,879 INFO L378 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 [2023-11-21 21:01:50,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:50,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:50,893 INFO L378 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 [2023-11-21 21:01:50,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:50,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:50,906 INFO L378 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 [2023-11-21 21:01:50,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:50,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:50,926 INFO L378 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 [2023-11-21 21:01:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 21:01:51,014 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:01:51,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:01:51,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843461444] [2023-11-21 21:01:51,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843461444] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:51,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:01:51,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 21:01:51,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864232702] [2023-11-21 21:01:51,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:51,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:01:51,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:01:51,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:01:51,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:01:51,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 70 [2023-11-21 21:01:51,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 51 transitions, 139 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2023-11-21 21:01:51,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:01:51,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 70 [2023-11-21 21:01:51,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:01:51,490 INFO L124 PetriNetUnfolderBase]: 1434/2443 cut-off events. [2023-11-21 21:01:51,490 INFO L125 PetriNetUnfolderBase]: For 364/421 co-relation queries the response was YES. [2023-11-21 21:01:51,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4832 conditions, 2443 events. 1434/2443 cut-off events. For 364/421 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 14084 event pairs, 1152 based on Foata normal form. 53/2092 useless extension candidates. Maximal degree in co-relation 4819. Up to 2064 conditions per place. [2023-11-21 21:01:51,503 INFO L140 encePairwiseOnDemand]: 67/70 looper letters, 31 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-11-21 21:01:51,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 49 transitions, 199 flow [2023-11-21 21:01:51,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:01:51,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:01:51,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2023-11-21 21:01:51,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2023-11-21 21:01:51,505 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 133 transitions. [2023-11-21 21:01:51,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 133 transitions. [2023-11-21 21:01:51,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:01:51,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 133 transitions. [2023-11-21 21:01:51,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 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) [2023-11-21 21:01:51,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 21:01:51,508 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 21:01:51,508 INFO L175 Difference]: Start difference. First operand has 63 places, 51 transitions, 139 flow. Second operand 3 states and 133 transitions. [2023-11-21 21:01:51,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 49 transitions, 199 flow [2023-11-21 21:01:51,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 49 transitions, 193 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-21 21:01:51,510 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 131 flow [2023-11-21 21:01:51,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2023-11-21 21:01:51,511 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -9 predicate places. [2023-11-21 21:01:51,511 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 131 flow [2023-11-21 21:01:51,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2023-11-21 21:01:51,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:01:51,512 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:01:51,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:51,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:51,716 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 21:01:51,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:51,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1957120539, now seen corresponding path program 1 times [2023-11-21 21:01:51,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:01:51,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750188085] [2023-11-21 21:01:51,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:51,717 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 [2023-11-21 21:01:51,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:01:51,718 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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) [2023-11-21 21:01:51,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:51,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:51,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 21:01:51,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:51,907 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 21:01:51,907 INFO L378 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 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-21 21:01:51,942 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 21:01:51,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-11-21 21:01:51,972 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 21:01:51,972 INFO L378 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 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-21 21:01:51,992 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 21:01:51,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-21 21:01:52,014 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 21:01:52,014 INFO L378 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 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-21 21:01:52,033 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 21:01:52,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-21 21:01:52,060 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 21:01:52,060 INFO L378 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 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-21 21:01:52,082 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 21:01:52,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-21 21:01:52,098 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 21:01:52,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-21 21:01:52,121 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 21:01:52,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-21 21:01:52,145 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 21:01:52,146 INFO L378 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 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-21 21:01:52,165 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-21 21:01:52,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-21 21:01:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 21:01:52,465 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:01:52,465 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:01:52,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750188085] [2023-11-21 21:01:52,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750188085] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:52,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:01:52,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 21:01:52,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480094617] [2023-11-21 21:01:52,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:52,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:01:52,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:01:52,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:01:52,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:01:52,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 70 [2023-11-21 21:01:52,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2023-11-21 21:01:52,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:01:52,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 70 [2023-11-21 21:01:52,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:01:52,928 INFO L124 PetriNetUnfolderBase]: 1534/2526 cut-off events. [2023-11-21 21:01:52,928 INFO L125 PetriNetUnfolderBase]: For 256/318 co-relation queries the response was YES. [2023-11-21 21:01:52,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5022 conditions, 2526 events. 1534/2526 cut-off events. For 256/318 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 14016 event pairs, 1236 based on Foata normal form. 0/2137 useless extension candidates. Maximal degree in co-relation 5009. Up to 2219 conditions per place. [2023-11-21 21:01:52,942 INFO L140 encePairwiseOnDemand]: 67/70 looper letters, 33 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2023-11-21 21:01:52,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 47 transitions, 195 flow [2023-11-21 21:01:52,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:01:52,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:01:52,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-11-21 21:01:52,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2023-11-21 21:01:52,944 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-11-21 21:01:52,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-11-21 21:01:52,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:01:52,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-11-21 21:01:52,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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) [2023-11-21 21:01:52,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 21:01:52,946 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 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) [2023-11-21 21:01:52,946 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 131 flow. Second operand 3 states and 129 transitions. [2023-11-21 21:01:52,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 47 transitions, 195 flow [2023-11-21 21:01:52,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 47 transitions, 194 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 21:01:52,948 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 128 flow [2023-11-21 21:01:52,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2023-11-21 21:01:52,949 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -10 predicate places. [2023-11-21 21:01:52,949 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 128 flow [2023-11-21 21:01:52,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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) [2023-11-21 21:01:52,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:01:52,950 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:01:52,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:53,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:53,154 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 21:01:53,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:53,154 INFO L85 PathProgramCache]: Analyzing trace with hash -883231705, now seen corresponding path program 1 times [2023-11-21 21:01:53,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:01:53,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1736969151] [2023-11-21 21:01:53,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:53,155 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 [2023-11-21 21:01:53,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:01:53,156 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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) [2023-11-21 21:01:53,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:53,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:53,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 21:01:53,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:53,325 INFO L378 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 [2023-11-21 21:01:53,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:53,345 INFO L378 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 [2023-11-21 21:01:53,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:53,352 INFO L378 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 [2023-11-21 21:01:53,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:53,357 INFO L378 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 [2023-11-21 21:01:53,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:53,364 INFO L378 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 [2023-11-21 21:01:53,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:53,368 INFO L378 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 [2023-11-21 21:01:53,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:53,377 INFO L378 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 [2023-11-21 21:01:53,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:53,381 INFO L378 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 [2023-11-21 21:01:53,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:53,405 INFO L378 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 [2023-11-21 21:01:53,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:53,412 INFO L378 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 [2023-11-21 21:01:53,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:53,417 INFO L378 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 [2023-11-21 21:01:53,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:53,432 INFO L378 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 [2023-11-21 21:01:53,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:53,438 INFO L378 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 [2023-11-21 21:01:53,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:53,446 INFO L378 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 [2023-11-21 21:01:53,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:53,453 INFO L378 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 [2023-11-21 21:01:53,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:53,457 INFO L378 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 [2023-11-21 21:01:53,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:53,473 INFO L378 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 [2023-11-21 21:01:53,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:53,481 INFO L378 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 [2023-11-21 21:01:53,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:53,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-21 21:01:53,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:53,528 INFO L378 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 [2023-11-21 21:01:53,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:53,537 INFO L378 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 [2023-11-21 21:01:53,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:53,551 INFO L378 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 [2023-11-21 21:01:53,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:53,565 INFO L378 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 [2023-11-21 21:01:53,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:53,573 INFO L378 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 [2023-11-21 21:01:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 21:01:53,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:01:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 21:01:54,062 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:01:54,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1736969151] [2023-11-21 21:01:54,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1736969151] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:01:54,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 21:01:54,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-21 21:01:54,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617502386] [2023-11-21 21:01:54,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 21:01:54,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 21:01:54,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:01:54,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 21:01:54,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-21 21:01:55,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 70 [2023-11-21 21:01:55,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 128 flow. Second operand has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 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) [2023-11-21 21:01:55,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:01:55,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 70 [2023-11-21 21:01:55,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:01:57,235 INFO L124 PetriNetUnfolderBase]: 2867/4679 cut-off events. [2023-11-21 21:01:57,235 INFO L125 PetriNetUnfolderBase]: For 146/146 co-relation queries the response was YES. [2023-11-21 21:01:57,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9298 conditions, 4679 events. 2867/4679 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 28626 event pairs, 733 based on Foata normal form. 0/3924 useless extension candidates. Maximal degree in co-relation 9284. Up to 1343 conditions per place. [2023-11-21 21:01:57,267 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 95 selfloop transitions, 6 changer transitions 0/115 dead transitions. [2023-11-21 21:01:57,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 115 transitions, 485 flow [2023-11-21 21:01:57,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 21:01:57,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 21:01:57,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 346 transitions. [2023-11-21 21:01:57,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7061224489795919 [2023-11-21 21:01:57,273 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 346 transitions. [2023-11-21 21:01:57,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 346 transitions. [2023-11-21 21:01:57,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:01:57,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 346 transitions. [2023-11-21 21:01:57,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 49.42857142857143) internal successors, (346), 7 states have internal predecessors, (346), 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) [2023-11-21 21:01:57,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 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) [2023-11-21 21:01:57,279 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 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) [2023-11-21 21:01:57,279 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 128 flow. Second operand 7 states and 346 transitions. [2023-11-21 21:01:57,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 115 transitions, 485 flow [2023-11-21 21:01:57,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 115 transitions, 484 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 21:01:57,282 INFO L231 Difference]: Finished difference. Result has 66 places, 49 transitions, 157 flow [2023-11-21 21:01:57,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=157, PETRI_PLACES=66, PETRI_TRANSITIONS=49} [2023-11-21 21:01:57,283 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -3 predicate places. [2023-11-21 21:01:57,283 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 49 transitions, 157 flow [2023-11-21 21:01:57,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 37.0) internal successors, (370), 10 states have internal predecessors, (370), 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) [2023-11-21 21:01:57,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:01:57,284 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:01:57,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:57,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:57,484 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 21:01:57,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:57,485 INFO L85 PathProgramCache]: Analyzing trace with hash 404726839, now seen corresponding path program 1 times [2023-11-21 21:01:57,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:01:57,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642619707] [2023-11-21 21:01:57,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:57,485 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 [2023-11-21 21:01:57,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:01:57,487 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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) [2023-11-21 21:01:57,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:01:57,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-21 21:01:57,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:01:57,640 INFO L378 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 [2023-11-21 21:01:57,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:57,646 INFO L378 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 [2023-11-21 21:01:57,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:57,651 INFO L378 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 [2023-11-21 21:01:57,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:57,658 INFO L378 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 [2023-11-21 21:01:57,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:57,666 INFO L378 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 [2023-11-21 21:01:57,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:57,680 INFO L378 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 [2023-11-21 21:01:57,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:57,690 INFO L378 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 [2023-11-21 21:01:57,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:57,705 INFO L378 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 [2023-11-21 21:01:57,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:57,720 INFO L378 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 [2023-11-21 21:01:57,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:57,727 INFO L378 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 [2023-11-21 21:01:57,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:57,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-21 21:01:57,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:57,768 INFO L378 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 [2023-11-21 21:01:57,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:57,774 INFO L378 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 [2023-11-21 21:01:57,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:57,781 INFO L378 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 [2023-11-21 21:01:57,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:57,789 INFO L378 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 [2023-11-21 21:01:57,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:57,793 INFO L378 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 [2023-11-21 21:01:57,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:57,801 INFO L378 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 [2023-11-21 21:01:57,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:57,816 INFO L378 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 [2023-11-21 21:01:57,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:57,825 INFO L378 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 [2023-11-21 21:01:57,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:57,838 INFO L378 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 [2023-11-21 21:01:57,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:57,847 INFO L378 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 [2023-11-21 21:01:57,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:57,852 INFO L378 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 [2023-11-21 21:01:57,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:57,861 INFO L378 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 [2023-11-21 21:01:57,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:01:57,866 INFO L378 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 [2023-11-21 21:01:57,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 21:01:57,974 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:01:57,974 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:01:57,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642619707] [2023-11-21 21:01:57,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642619707] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:01:57,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:01:57,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 21:01:57,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592465666] [2023-11-21 21:01:57,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:01:57,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 21:01:57,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:01:57,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 21:01:57,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 21:01:58,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 70 [2023-11-21 21:01:58,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 49 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 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) [2023-11-21 21:01:58,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:01:58,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 70 [2023-11-21 21:01:58,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:01:59,537 INFO L124 PetriNetUnfolderBase]: 5405/8774 cut-off events. [2023-11-21 21:01:59,537 INFO L125 PetriNetUnfolderBase]: For 2784/2852 co-relation queries the response was YES. [2023-11-21 21:01:59,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18318 conditions, 8774 events. 5405/8774 cut-off events. For 2784/2852 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 58902 event pairs, 3387 based on Foata normal form. 0/7181 useless extension candidates. Maximal degree in co-relation 18301. Up to 4660 conditions per place. [2023-11-21 21:01:59,654 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 55 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2023-11-21 21:01:59,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 73 transitions, 351 flow [2023-11-21 21:01:59,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 21:01:59,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 21:01:59,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 227 transitions. [2023-11-21 21:01:59,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485714285714286 [2023-11-21 21:01:59,657 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 227 transitions. [2023-11-21 21:01:59,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 227 transitions. [2023-11-21 21:01:59,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:01:59,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 227 transitions. [2023-11-21 21:01:59,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 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) [2023-11-21 21:01:59,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 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) [2023-11-21 21:01:59,659 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 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) [2023-11-21 21:01:59,659 INFO L175 Difference]: Start difference. First operand has 66 places, 49 transitions, 157 flow. Second operand 5 states and 227 transitions. [2023-11-21 21:01:59,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 73 transitions, 351 flow [2023-11-21 21:01:59,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 73 transitions, 336 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-21 21:01:59,663 INFO L231 Difference]: Finished difference. Result has 68 places, 50 transitions, 164 flow [2023-11-21 21:01:59,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=68, PETRI_TRANSITIONS=50} [2023-11-21 21:01:59,667 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -1 predicate places. [2023-11-21 21:01:59,668 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 50 transitions, 164 flow [2023-11-21 21:01:59,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.0) internal successors, (185), 5 states have internal predecessors, (185), 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) [2023-11-21 21:01:59,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:01:59,668 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:01:59,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:59,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:01:59,872 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 21:01:59,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:01:59,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1245007206, now seen corresponding path program 1 times [2023-11-21 21:01:59,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:01:59,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992229164] [2023-11-21 21:01:59,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:01:59,873 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 [2023-11-21 21:01:59,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:01:59,874 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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) [2023-11-21 21:01:59,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:02:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:00,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 21:02:00,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:02:00,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 21:02:00,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:00,061 INFO L378 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 [2023-11-21 21:02:00,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:00,071 INFO L378 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 [2023-11-21 21:02:00,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:00,076 INFO L378 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 [2023-11-21 21:02:00,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:00,085 INFO L378 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 [2023-11-21 21:02:00,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:00,131 INFO L378 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 [2023-11-21 21:02:00,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:00,144 INFO L378 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 [2023-11-21 21:02:00,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:00,161 INFO L378 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 [2023-11-21 21:02:00,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:00,181 INFO L378 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 [2023-11-21 21:02:00,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:00,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-21 21:02:00,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:00,219 INFO L378 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 [2023-11-21 21:02:00,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:00,235 INFO L378 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 [2023-11-21 21:02:00,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:00,242 INFO L378 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 [2023-11-21 21:02:00,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:00,250 INFO L378 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 [2023-11-21 21:02:00,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:00,266 INFO L378 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 [2023-11-21 21:02:00,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:00,274 INFO L378 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 [2023-11-21 21:02:00,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:00,281 INFO L378 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 [2023-11-21 21:02:00,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:00,289 INFO L378 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 [2023-11-21 21:02:00,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:00,300 INFO L378 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 [2023-11-21 21:02:00,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:00,317 INFO L378 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 [2023-11-21 21:02:00,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:00,323 INFO L378 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 [2023-11-21 21:02:00,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:00,331 INFO L378 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 [2023-11-21 21:02:00,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:00,339 INFO L378 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 [2023-11-21 21:02:00,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:00,344 INFO L378 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 [2023-11-21 21:02:00,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 21:02:00,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:02:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 21:02:00,909 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:02:00,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992229164] [2023-11-21 21:02:00,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [992229164] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:02:00,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 21:02:00,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-21 21:02:00,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142254575] [2023-11-21 21:02:00,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 21:02:00,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 21:02:00,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:02:00,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 21:02:00,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-21 21:02:02,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 70 [2023-11-21 21:02:02,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 50 transitions, 164 flow. Second operand has 10 states, 10 states have (on average 37.4) internal successors, (374), 10 states have internal predecessors, (374), 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) [2023-11-21 21:02:02,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:02:02,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 70 [2023-11-21 21:02:02,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:02:05,300 INFO L124 PetriNetUnfolderBase]: 9709/15424 cut-off events. [2023-11-21 21:02:05,301 INFO L125 PetriNetUnfolderBase]: For 4290/4479 co-relation queries the response was YES. [2023-11-21 21:02:05,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33324 conditions, 15424 events. 9709/15424 cut-off events. For 4290/4479 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 107468 event pairs, 3387 based on Foata normal form. 0/12696 useless extension candidates. Maximal degree in co-relation 33306. Up to 4660 conditions per place. [2023-11-21 21:02:05,404 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 101 selfloop transitions, 6 changer transitions 0/121 dead transitions. [2023-11-21 21:02:05,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 121 transitions, 590 flow [2023-11-21 21:02:05,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 21:02:05,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 21:02:05,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 340 transitions. [2023-11-21 21:02:05,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6938775510204082 [2023-11-21 21:02:05,407 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 340 transitions. [2023-11-21 21:02:05,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 340 transitions. [2023-11-21 21:02:05,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:02:05,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 340 transitions. [2023-11-21 21:02:05,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 48.57142857142857) internal successors, (340), 7 states have internal predecessors, (340), 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) [2023-11-21 21:02:05,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 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) [2023-11-21 21:02:05,411 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 70.0) internal successors, (560), 8 states have internal predecessors, (560), 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) [2023-11-21 21:02:05,411 INFO L175 Difference]: Start difference. First operand has 68 places, 50 transitions, 164 flow. Second operand 7 states and 340 transitions. [2023-11-21 21:02:05,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 121 transitions, 590 flow [2023-11-21 21:02:05,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 121 transitions, 584 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-21 21:02:05,418 INFO L231 Difference]: Finished difference. Result has 73 places, 52 transitions, 188 flow [2023-11-21 21:02:05,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=188, PETRI_PLACES=73, PETRI_TRANSITIONS=52} [2023-11-21 21:02:05,419 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 4 predicate places. [2023-11-21 21:02:05,419 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 52 transitions, 188 flow [2023-11-21 21:02:05,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 37.4) internal successors, (374), 10 states have internal predecessors, (374), 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) [2023-11-21 21:02:05,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:02:05,419 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:02:05,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:02:05,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:02:05,623 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 21:02:05,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:02:05,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1669284303, now seen corresponding path program 1 times [2023-11-21 21:02:05,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:02:05,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895578945] [2023-11-21 21:02:05,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:02:05,625 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 [2023-11-21 21:02:05,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:02:05,626 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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) [2023-11-21 21:02:05,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:02:05,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:05,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-21 21:02:05,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:02:05,809 INFO L378 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 [2023-11-21 21:02:05,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:05,821 INFO L378 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 [2023-11-21 21:02:05,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:05,829 INFO L378 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 [2023-11-21 21:02:05,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:05,835 INFO L378 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 [2023-11-21 21:02:05,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:05,844 INFO L378 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 [2023-11-21 21:02:05,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:05,849 INFO L378 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 [2023-11-21 21:02:05,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:05,869 INFO L378 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 [2023-11-21 21:02:05,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:05,877 INFO L378 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 [2023-11-21 21:02:05,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:05,896 INFO L378 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 [2023-11-21 21:02:05,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:05,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-21 21:02:05,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:05,936 INFO L378 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 [2023-11-21 21:02:05,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:05,953 INFO L378 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 [2023-11-21 21:02:05,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:05,960 INFO L378 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 [2023-11-21 21:02:05,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:05,968 INFO L378 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 [2023-11-21 21:02:05,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:05,977 INFO L378 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 [2023-11-21 21:02:05,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:05,993 INFO L378 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 [2023-11-21 21:02:06,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:06,002 INFO L378 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 [2023-11-21 21:02:06,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:06,008 INFO L378 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 [2023-11-21 21:02:06,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:06,018 INFO L378 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 [2023-11-21 21:02:06,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:06,034 INFO L378 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 [2023-11-21 21:02:06,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:06,042 INFO L378 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 [2023-11-21 21:02:06,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:06,051 INFO L378 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 [2023-11-21 21:02:06,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:06,059 INFO L378 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 [2023-11-21 21:02:06,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:06,064 INFO L378 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 [2023-11-21 21:02:06,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 21:02:06,195 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 21:02:06,196 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-21 21:02:06,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895578945] [2023-11-21 21:02:06,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895578945] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:02:06,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:02:06,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 21:02:06,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585127169] [2023-11-21 21:02:06,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:02:06,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 21:02:06,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-21 21:02:06,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 21:02:06,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 21:02:06,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 70 [2023-11-21 21:02:06,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 52 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 37.4) internal successors, (187), 5 states have internal predecessors, (187), 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) [2023-11-21 21:02:06,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:02:06,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 70 [2023-11-21 21:02:06,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:02:10,380 INFO L124 PetriNetUnfolderBase]: 17161/26726 cut-off events. [2023-11-21 21:02:10,380 INFO L125 PetriNetUnfolderBase]: For 13910/14289 co-relation queries the response was YES. [2023-11-21 21:02:10,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60939 conditions, 26726 events. 17161/26726 cut-off events. For 13910/14289 co-relation queries the response was YES. Maximal size of possible extension queue 955. Compared 198330 event pairs, 9609 based on Foata normal form. 0/21500 useless extension candidates. Maximal degree in co-relation 60919. Up to 15390 conditions per place. [2023-11-21 21:02:10,539 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 59 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2023-11-21 21:02:10,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 77 transitions, 409 flow [2023-11-21 21:02:10,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 21:02:10,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 21:02:10,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 225 transitions. [2023-11-21 21:02:10,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2023-11-21 21:02:10,541 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 225 transitions. [2023-11-21 21:02:10,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 225 transitions. [2023-11-21 21:02:10,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:02:10,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 225 transitions. [2023-11-21 21:02:10,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 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) [2023-11-21 21:02:10,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 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) [2023-11-21 21:02:10,544 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 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) [2023-11-21 21:02:10,544 INFO L175 Difference]: Start difference. First operand has 73 places, 52 transitions, 188 flow. Second operand 5 states and 225 transitions. [2023-11-21 21:02:10,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 77 transitions, 409 flow [2023-11-21 21:02:10,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 77 transitions, 394 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-21 21:02:10,589 INFO L231 Difference]: Finished difference. Result has 75 places, 53 transitions, 195 flow [2023-11-21 21:02:10,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=195, PETRI_PLACES=75, PETRI_TRANSITIONS=53} [2023-11-21 21:02:10,590 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 6 predicate places. [2023-11-21 21:02:10,590 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 53 transitions, 195 flow [2023-11-21 21:02:10,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.4) internal successors, (187), 5 states have internal predecessors, (187), 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) [2023-11-21 21:02:10,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:02:10,591 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-11-21 21:02:10,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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)] Forceful destruction successful, exit code 0 [2023-11-21 21:02:10,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:02:10,795 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 21:02:10,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:02:10,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1613058663, now seen corresponding path program 2 times [2023-11-21 21:02:10,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-21 21:02:10,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1364639157] [2023-11-21 21:02:10,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 21:02:10,796 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 [2023-11-21 21:02:10,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/mathsat [2023-11-21 21:02:10,796 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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) [2023-11-21 21:02:10,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_717c6231-78ad-487a-861c-c23d62fb260a/bin/uautomizer-verify-bycVGegfSx/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 [2023-11-21 21:02:10,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 21:02:10,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 21:02:11,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-21 21:02:11,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:02:11,026 INFO L378 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 [2023-11-21 21:02:11,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:11,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-21 21:02:11,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:11,064 INFO L378 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 [2023-11-21 21:02:11,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:11,079 INFO L378 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 [2023-11-21 21:02:11,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:11,095 INFO L378 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 [2023-11-21 21:02:11,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:11,111 INFO L378 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 [2023-11-21 21:02:11,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:11,121 INFO L378 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 [2023-11-21 21:02:11,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:11,128 INFO L378 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 [2023-11-21 21:02:11,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:11,138 INFO L378 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 [2023-11-21 21:02:11,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:11,155 INFO L378 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 [2023-11-21 21:02:11,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:11,163 INFO L378 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 [2023-11-21 21:02:11,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:11,168 INFO L378 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 [2023-11-21 21:02:11,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:11,179 INFO L378 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 [2023-11-21 21:02:11,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:11,197 INFO L378 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 [2023-11-21 21:02:11,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:11,203 INFO L378 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 [2023-11-21 21:02:11,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:11,211 INFO L378 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 [2023-11-21 21:02:11,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:11,220 INFO L378 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 [2023-11-21 21:02:11,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:11,226 INFO L378 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 [2023-11-21 21:02:11,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:11,233 INFO L378 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 [2023-11-21 21:02:11,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:11,242 INFO L378 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 [2023-11-21 21:02:11,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:11,259 INFO L378 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 [2023-11-21 21:02:11,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:11,268 INFO L378 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 [2023-11-21 21:02:11,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:11,277 INFO L378 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 [2023-11-21 21:02:11,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:11,282 INFO L378 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