./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya --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 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:34:35,326 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:34:35,394 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-28 20:34:35,399 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:34:35,399 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:34:35,425 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:34:35,425 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:34:35,426 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:34:35,427 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:34:35,427 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:34:35,428 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:34:35,428 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:34:35,429 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:34:35,429 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:34:35,430 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:34:35,430 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:34:35,431 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:34:35,431 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:34:35,432 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:34:35,432 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:34:35,433 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-28 20:34:35,433 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-28 20:34:35,434 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-28 20:34:35,434 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:34:35,435 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-28 20:34:35,435 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-28 20:34:35,435 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:34:35,436 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:34:35,436 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:34:35,437 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:34:35,437 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:34:35,437 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:34:35,438 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:34:35,438 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:34:35,439 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:34:35,439 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:34:35,439 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:34:35,440 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:34:35,440 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:34:35,440 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:34:35,440 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:34:35,441 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_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 [2023-11-28 20:34:35,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:34:35,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:34:35,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:34:35,741 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:34:35,741 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:34:35,742 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/unroll-2.wvr.c [2023-11-28 20:34:38,545 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:34:38,716 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:34:38,716 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/sv-benchmarks/c/weaver/unroll-2.wvr.c [2023-11-28 20:34:38,724 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/data/c16d01977/729a92052072482097916d7762b5d728/FLAG05a86abf0 [2023-11-28 20:34:38,738 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/data/c16d01977/729a92052072482097916d7762b5d728 [2023-11-28 20:34:38,741 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:34:38,742 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:34:38,743 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:34:38,743 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:34:38,749 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:34:38,749 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:34:38" (1/1) ... [2023-11-28 20:34:38,750 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73812a77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:38, skipping insertion in model container [2023-11-28 20:34:38,751 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:34:38" (1/1) ... [2023-11-28 20:34:38,776 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:34:38,933 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:34:38,945 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) [2023-11-28 20:34:38,945 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@30d2ef7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:38, skipping insertion in model container [2023-11-28 20:34:38,946 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:34:38,946 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-28 20:34:38,948 INFO L158 Benchmark]: Toolchain (without parser) took 204.83ms. Allocated memory is still 153.1MB. Free memory was 113.3MB in the beginning and 103.6MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-28 20:34:38,948 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 153.1MB. Free memory is still 126.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-28 20:34:38,949 INFO L158 Benchmark]: CACSL2BoogieTranslator took 202.56ms. Allocated memory is still 153.1MB. Free memory was 113.3MB in the beginning and 103.6MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-28 20:34:38,951 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 153.1MB. Free memory is still 126.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 202.56ms. Allocated memory is still 153.1MB. Free memory was 113.3MB in the beginning and 103.6MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 97]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya --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 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:34:40,644 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:34:40,711 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-28 20:34:40,732 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:34:40,733 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:34:40,765 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:34:40,766 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:34:40,767 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:34:40,768 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:34:40,768 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:34:40,769 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:34:40,769 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:34:40,770 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:34:40,771 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:34:40,771 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:34:40,772 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:34:40,772 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 20:34:40,773 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:34:40,773 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 20:34:40,774 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:34:40,774 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-28 20:34:40,775 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-28 20:34:40,775 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-28 20:34:40,776 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:34:40,777 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-28 20:34:40,777 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-28 20:34:40,777 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-28 20:34:40,778 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-28 20:34:40,778 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 20:34:40,779 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:34:40,779 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:34:40,780 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:34:40,780 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:34:40,780 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:34:40,780 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:34:40,781 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:34:40,781 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:34:40,781 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-28 20:34:40,781 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-28 20:34:40,782 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:34:40,782 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:34:40,782 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:34:40,782 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:34:40,783 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-28 20:34:40,783 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_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c7125507f231f46c946ebcd57e8b56859ee58b969eed99ccdbcf88141d9e219 [2023-11-28 20:34:41,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:34:41,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:34:41,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:34:41,083 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:34:41,083 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:34:41,085 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/unroll-2.wvr.c [2023-11-28 20:34:43,943 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:34:44,106 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:34:44,107 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/sv-benchmarks/c/weaver/unroll-2.wvr.c [2023-11-28 20:34:44,115 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/data/fc51740c5/6595a2e8799f47cbabdb384f52c4201b/FLAGd795f8340 [2023-11-28 20:34:44,127 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/data/fc51740c5/6595a2e8799f47cbabdb384f52c4201b [2023-11-28 20:34:44,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:34:44,131 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:34:44,132 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:34:44,133 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:34:44,137 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:34:44,138 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:34:44" (1/1) ... [2023-11-28 20:34:44,139 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@393a03c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:44, skipping insertion in model container [2023-11-28 20:34:44,139 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:34:44" (1/1) ... [2023-11-28 20:34:44,161 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:34:44,339 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:34:44,352 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-28 20:34:44,357 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:34:44,374 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:34:44,382 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:34:44,407 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:34:44,423 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:34:44,424 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:44 WrapperNode [2023-11-28 20:34:44,424 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:34:44,425 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:34:44,425 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:34:44,425 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:34:44,432 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:44" (1/1) ... [2023-11-28 20:34:44,443 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:44" (1/1) ... [2023-11-28 20:34:44,469 INFO L138 Inliner]: procedures = 26, calls = 33, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 139 [2023-11-28 20:34:44,470 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:34:44,471 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:34:44,471 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:34:44,471 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:34:44,480 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:44" (1/1) ... [2023-11-28 20:34:44,480 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:44" (1/1) ... [2023-11-28 20:34:44,485 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:44" (1/1) ... [2023-11-28 20:34:44,504 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 2, 2, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-28 20:34:44,505 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:44" (1/1) ... [2023-11-28 20:34:44,505 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:44" (1/1) ... [2023-11-28 20:34:44,517 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:44" (1/1) ... [2023-11-28 20:34:44,521 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:44" (1/1) ... [2023-11-28 20:34:44,524 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:44" (1/1) ... [2023-11-28 20:34:44,527 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:44" (1/1) ... [2023-11-28 20:34:44,532 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:34:44,533 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:34:44,534 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:34:44,534 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:34:44,535 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:44" (1/1) ... [2023-11-28 20:34:44,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:34:44,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:34:44,574 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:34:44,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:34:44,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 20:34:44,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-28 20:34:44,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-28 20:34:44,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-28 20:34:44,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-28 20:34:44,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 20:34:44,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-28 20:34:44,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-28 20:34:44,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-28 20:34:44,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-28 20:34:44,618 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-28 20:34:44,618 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-28 20:34:44,618 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-28 20:34:44,618 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-28 20:34:44,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-28 20:34:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:34:44,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:34:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 20:34:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-28 20:34:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-28 20:34:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-28 20:34:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-28 20:34:44,622 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-28 20:34:44,746 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:34:44,748 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:34:45,151 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:34:45,397 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:34:45,397 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-28 20:34:45,398 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:34:45 BoogieIcfgContainer [2023-11-28 20:34:45,398 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:34:45,400 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:34:45,401 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:34:45,404 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:34:45,404 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:34:44" (1/3) ... [2023-11-28 20:34:45,405 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9455cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:34:45, skipping insertion in model container [2023-11-28 20:34:45,405 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:34:44" (2/3) ... [2023-11-28 20:34:45,405 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9455cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:34:45, skipping insertion in model container [2023-11-28 20:34:45,405 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:34:45" (3/3) ... [2023-11-28 20:34:45,406 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2023-11-28 20:34:45,425 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:34:45,426 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-28 20:34:45,426 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-28 20:34:45,489 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-28 20:34:45,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 47 transitions, 108 flow [2023-11-28 20:34:45,567 INFO L124 PetriNetUnfolderBase]: 3/45 cut-off events. [2023-11-28 20:34:45,567 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-28 20:34:45,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 45 events. 3/45 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 83 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2023-11-28 20:34:45,572 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 47 transitions, 108 flow [2023-11-28 20:34:45,576 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 44 transitions, 100 flow [2023-11-28 20:34:45,586 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:34:45,593 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;@556a8746, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:34:45,593 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-11-28 20:34:45,598 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 20:34:45,598 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-28 20:34:45,598 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 20:34:45,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:34:45,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 20:34:45,599 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:34:45,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:45,604 INFO L85 PathProgramCache]: Analyzing trace with hash 471056, now seen corresponding path program 1 times [2023-11-28 20:34:45,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:34:45,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586745351] [2023-11-28 20:34:45,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:45,617 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 [2023-11-28 20:34:45,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:34:45,619 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:34:45,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:34:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:45,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:34:45,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:45,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-28 20:34:45,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:45,808 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 [2023-11-28 20:34:45,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:45,823 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 [2023-11-28 20:34:45,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:45,840 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 [2023-11-28 20:34:45,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:45,848 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 [2023-11-28 20:34:45,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:45,857 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 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-28 20:34:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:34:45,867 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:34:45,868 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:34:45,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586745351] [2023-11-28 20:34:45,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586745351] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:34:45,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:34:45,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 20:34:45,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730268608] [2023-11-28 20:34:45,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:34:45,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:34:45,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:34:45,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:34:45,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:34:45,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 47 [2023-11-28 20:34:45,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:45,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:34:45,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 47 [2023-11-28 20:34:45,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:34:46,175 INFO L124 PetriNetUnfolderBase]: 75/199 cut-off events. [2023-11-28 20:34:46,175 INFO L125 PetriNetUnfolderBase]: For 26/29 co-relation queries the response was YES. [2023-11-28 20:34:46,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352 conditions, 199 events. 75/199 cut-off events. For 26/29 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 835 event pairs, 53 based on Foata normal form. 1/141 useless extension candidates. Maximal degree in co-relation 293. Up to 131 conditions per place. [2023-11-28 20:34:46,181 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 18 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-11-28 20:34:46,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 41 transitions, 134 flow [2023-11-28 20:34:46,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:34:46,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:34:46,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2023-11-28 20:34:46,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-11-28 20:34:46,194 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 94 transitions. [2023-11-28 20:34:46,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 94 transitions. [2023-11-28 20:34:46,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:34:46,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 94 transitions. [2023-11-28 20:34:46,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:46,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:46,204 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:46,206 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 100 flow. Second operand 3 states and 94 transitions. [2023-11-28 20:34:46,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 41 transitions, 134 flow [2023-11-28 20:34:46,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 41 transitions, 126 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-28 20:34:46,211 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 90 flow [2023-11-28 20:34:46,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2023-11-28 20:34:46,216 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-11-28 20:34:46,217 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 90 flow [2023-11-28 20:34:46,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:46,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:34:46,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-28 20:34:46,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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)] Forceful destruction successful, exit code 0 [2023-11-28 20:34:46,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:34:46,418 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:34:46,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:46,419 INFO L85 PathProgramCache]: Analyzing trace with hash 471057, now seen corresponding path program 1 times [2023-11-28 20:34:46,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:34:46,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803753397] [2023-11-28 20:34:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:46,420 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 [2023-11-28 20:34:46,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:34:46,421 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:34:46,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:34:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:46,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-28 20:34:46,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:46,506 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 8 treesize of output 7 [2023-11-28 20:34:46,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:46,521 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 13 treesize of output 1 [2023-11-28 20:34:46,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:46,532 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 8 treesize of output 1 [2023-11-28 20:34:46,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:46,542 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 13 treesize of output 1 [2023-11-28 20:34:46,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:46,557 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 13 treesize of output 1 [2023-11-28 20:34:46,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:46,576 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 18 treesize of output 1 [2023-11-28 20:34:46,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:34:46,649 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:34:46,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:34:46,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803753397] [2023-11-28 20:34:46,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803753397] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:34:46,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:34:46,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:34:46,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279384828] [2023-11-28 20:34:46,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:34:46,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:34:46,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:34:46,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:34:46,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:34:46,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 47 [2023-11-28 20:34:46,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:46,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:34:46,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 47 [2023-11-28 20:34:46,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:34:47,083 INFO L124 PetriNetUnfolderBase]: 75/201 cut-off events. [2023-11-28 20:34:47,083 INFO L125 PetriNetUnfolderBase]: For 6/9 co-relation queries the response was YES. [2023-11-28 20:34:47,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 201 events. 75/201 cut-off events. For 6/9 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 833 event pairs, 53 based on Foata normal form. 1/143 useless extension candidates. Maximal degree in co-relation 328. Up to 135 conditions per place. [2023-11-28 20:34:47,086 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 21 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-11-28 20:34:47,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 140 flow [2023-11-28 20:34:47,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:34:47,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:34:47,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2023-11-28 20:34:47,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6879432624113475 [2023-11-28 20:34:47,089 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 97 transitions. [2023-11-28 20:34:47,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 97 transitions. [2023-11-28 20:34:47,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:34:47,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 97 transitions. [2023-11-28 20:34:47,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:47,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:47,093 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:47,093 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 90 flow. Second operand 3 states and 97 transitions. [2023-11-28 20:34:47,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 140 flow [2023-11-28 20:34:47,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 43 transitions, 136 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-28 20:34:47,096 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 100 flow [2023-11-28 20:34:47,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-11-28 20:34:47,097 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -4 predicate places. [2023-11-28 20:34:47,097 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 100 flow [2023-11-28 20:34:47,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:47,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:34:47,097 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-28 20:34:47,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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)] Ended with exit code 0 [2023-11-28 20:34:47,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:34:47,298 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:34:47,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:47,299 INFO L85 PathProgramCache]: Analyzing trace with hash 452700359, now seen corresponding path program 1 times [2023-11-28 20:34:47,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:34:47,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024950840] [2023-11-28 20:34:47,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:47,300 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 [2023-11-28 20:34:47,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:34:47,301 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:34:47,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:34:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:47,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-28 20:34:47,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:47,394 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 18 treesize of output 7 [2023-11-28 20:34:47,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:47,414 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 13 treesize of output 1 [2023-11-28 20:34:47,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:47,429 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 13 treesize of output 1 [2023-11-28 20:34:47,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:47,437 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 8 treesize of output 1 [2023-11-28 20:34:47,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:47,450 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 13 treesize of output 1 [2023-11-28 20:34:47,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:47,458 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 8 treesize of output 1 [2023-11-28 20:34:47,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:34:47,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:34:48,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:34:48,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:34:48,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024950840] [2023-11-28 20:34:48,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024950840] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:34:48,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:34:48,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-28 20:34:48,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128798217] [2023-11-28 20:34:48,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:34:48,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-28 20:34:48,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:34:48,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-28 20:34:48,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-28 20:34:48,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 47 [2023-11-28 20:34:48,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 100 flow. Second operand has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:48,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:34:48,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 47 [2023-11-28 20:34:48,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:34:49,388 INFO L124 PetriNetUnfolderBase]: 78/210 cut-off events. [2023-11-28 20:34:49,388 INFO L125 PetriNetUnfolderBase]: For 6/9 co-relation queries the response was YES. [2023-11-28 20:34:49,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 210 events. 78/210 cut-off events. For 6/9 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 887 event pairs, 53 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 363. Up to 138 conditions per place. [2023-11-28 20:34:49,391 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 21 selfloop transitions, 11 changer transitions 0/52 dead transitions. [2023-11-28 20:34:49,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 196 flow [2023-11-28 20:34:49,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 20:34:49,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-28 20:34:49,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 251 transitions. [2023-11-28 20:34:49,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5933806146572104 [2023-11-28 20:34:49,394 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 251 transitions. [2023-11-28 20:34:49,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 251 transitions. [2023-11-28 20:34:49,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:34:49,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 251 transitions. [2023-11-28 20:34:49,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 27.88888888888889) internal successors, (251), 9 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:49,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 47.0) internal successors, (470), 10 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:49,398 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 47.0) internal successors, (470), 10 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:49,398 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 100 flow. Second operand 9 states and 251 transitions. [2023-11-28 20:34:49,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 196 flow [2023-11-28 20:34:49,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 194 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:34:49,400 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 172 flow [2023-11-28 20:34:49,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=172, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2023-11-28 20:34:49,401 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 6 predicate places. [2023-11-28 20:34:49,401 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 172 flow [2023-11-28 20:34:49,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:49,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:34:49,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-28 20:34:49,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-28 20:34:49,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:34:49,602 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:34:49,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:49,603 INFO L85 PathProgramCache]: Analyzing trace with hash 452700415, now seen corresponding path program 1 times [2023-11-28 20:34:49,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:34:49,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644300414] [2023-11-28 20:34:49,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:49,604 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 [2023-11-28 20:34:49,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:34:49,605 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:34:49,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:34:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:49,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 20:34:49,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:49,748 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-28 20:34:49,748 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 [2023-11-28 20:34:49,768 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-28 20:34:49,769 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 [2023-11-28 20:34:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:34:49,882 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:34:49,882 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:34:49,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644300414] [2023-11-28 20:34:49,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644300414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:34:49,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:34:49,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 20:34:49,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083702420] [2023-11-28 20:34:49,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:34:49,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:34:49,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:34:49,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:34:49,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:34:49,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2023-11-28 20:34:49,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:49,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:34:49,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2023-11-28 20:34:49,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:34:50,112 INFO L124 PetriNetUnfolderBase]: 118/289 cut-off events. [2023-11-28 20:34:50,113 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-28 20:34:50,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 538 conditions, 289 events. 118/289 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1265 event pairs, 84 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 507. Up to 205 conditions per place. [2023-11-28 20:34:50,116 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 32 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-11-28 20:34:50,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 234 flow [2023-11-28 20:34:50,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:34:50,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:34:50,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2023-11-28 20:34:50,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2023-11-28 20:34:50,119 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 87 transitions. [2023-11-28 20:34:50,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 87 transitions. [2023-11-28 20:34:50,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:34:50,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 87 transitions. [2023-11-28 20:34:50,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:50,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:50,121 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:50,121 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 172 flow. Second operand 3 states and 87 transitions. [2023-11-28 20:34:50,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 234 flow [2023-11-28 20:34:50,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 220 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-28 20:34:50,125 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 156 flow [2023-11-28 20:34:50,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2023-11-28 20:34:50,126 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 5 predicate places. [2023-11-28 20:34:50,126 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 156 flow [2023-11-28 20:34:50,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:50,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:34:50,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-28 20:34:50,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:34:50,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:34:50,327 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:34:50,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:50,328 INFO L85 PathProgramCache]: Analyzing trace with hash 452700416, now seen corresponding path program 1 times [2023-11-28 20:34:50,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:34:50,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440668760] [2023-11-28 20:34:50,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:50,329 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 [2023-11-28 20:34:50,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:34:50,330 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:34:50,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:34:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:50,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:34:50,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:50,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:50,438 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-28 20:34:50,438 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 16 treesize of output 17 [2023-11-28 20:34:50,447 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 [2023-11-28 20:34:50,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:50,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:50,473 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 13 [2023-11-28 20:34:50,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:50,481 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 [2023-11-28 20:34:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:34:50,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:34:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:34:51,165 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:34:51,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440668760] [2023-11-28 20:34:51,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440668760] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:34:51,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:34:51,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-28 20:34:51,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926587032] [2023-11-28 20:34:51,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:34:51,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-28 20:34:51,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:34:51,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-28 20:34:51,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-28 20:34:52,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2023-11-28 20:34:52,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 156 flow. Second operand has 10 states, 10 states have (on average 22.0) internal successors, (220), 10 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) [2023-11-28 20:34:52,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:34:52,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2023-11-28 20:34:52,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:34:52,716 INFO L124 PetriNetUnfolderBase]: 118/284 cut-off events. [2023-11-28 20:34:52,716 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-28 20:34:52,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 284 events. 118/284 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1218 event pairs, 84 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 516. Up to 201 conditions per place. [2023-11-28 20:34:52,719 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 29 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2023-11-28 20:34:52,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 48 transitions, 218 flow [2023-11-28 20:34:52,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:34:52,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 20:34:52,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2023-11-28 20:34:52,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5702127659574469 [2023-11-28 20:34:52,721 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 134 transitions. [2023-11-28 20:34:52,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 134 transitions. [2023-11-28 20:34:52,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:34:52,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 134 transitions. [2023-11-28 20:34:52,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:52,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 47.0) internal successors, (282), 6 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:52,723 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 47.0) internal successors, (282), 6 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:52,723 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 156 flow. Second operand 5 states and 134 transitions. [2023-11-28 20:34:52,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 48 transitions, 218 flow [2023-11-28 20:34:52,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 48 transitions, 217 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:34:52,726 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 159 flow [2023-11-28 20:34:52,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-11-28 20:34:52,727 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 6 predicate places. [2023-11-28 20:34:52,727 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 159 flow [2023-11-28 20:34:52,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.0) internal successors, (220), 10 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) [2023-11-28 20:34:52,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:34:52,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:34:52,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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)] Ended with exit code 0 [2023-11-28 20:34:52,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:34:52,928 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:34:52,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:52,929 INFO L85 PathProgramCache]: Analyzing trace with hash 201184796, now seen corresponding path program 1 times [2023-11-28 20:34:52,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:34:52,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400237407] [2023-11-28 20:34:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:52,930 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 [2023-11-28 20:34:52,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:34:52,931 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:34:52,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:34:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:53,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 20:34:53,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:53,047 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-28 20:34:53,048 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 11 treesize of output 17 [2023-11-28 20:34:53,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:53,089 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-28 20:34:53,089 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 16 treesize of output 13 [2023-11-28 20:34:53,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:53,112 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-28 20:34:53,113 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 11 treesize of output 13 [2023-11-28 20:34:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:34:53,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:34:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:34:53,942 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:34:53,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400237407] [2023-11-28 20:34:53,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400237407] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:34:53,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:34:53,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-28 20:34:53,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424919793] [2023-11-28 20:34:53,943 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:34:53,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-28 20:34:53,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:34:53,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-28 20:34:53,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-28 20:34:54,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2023-11-28 20:34:54,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 159 flow. Second operand has 10 states, 10 states have (on average 22.4) internal successors, (224), 10 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) [2023-11-28 20:34:54,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:34:54,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2023-11-28 20:34:54,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:34:55,286 INFO L124 PetriNetUnfolderBase]: 87/218 cut-off events. [2023-11-28 20:34:55,287 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-28 20:34:55,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 218 events. 87/218 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 860 event pairs, 60 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 410. Up to 158 conditions per place. [2023-11-28 20:34:55,298 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 29 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-11-28 20:34:55,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 46 transitions, 221 flow [2023-11-28 20:34:55,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:34:55,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 20:34:55,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2023-11-28 20:34:55,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5702127659574469 [2023-11-28 20:34:55,300 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 134 transitions. [2023-11-28 20:34:55,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 134 transitions. [2023-11-28 20:34:55,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:34:55,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 134 transitions. [2023-11-28 20:34:55,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:55,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 47.0) internal successors, (282), 6 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:55,303 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 47.0) internal successors, (282), 6 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:55,303 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 159 flow. Second operand 5 states and 134 transitions. [2023-11-28 20:34:55,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 46 transitions, 221 flow [2023-11-28 20:34:55,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 46 transitions, 215 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-28 20:34:55,307 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 157 flow [2023-11-28 20:34:55,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-11-28 20:34:55,308 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 5 predicate places. [2023-11-28 20:34:55,308 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 157 flow [2023-11-28 20:34:55,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.4) internal successors, (224), 10 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) [2023-11-28 20:34:55,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:34:55,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:34:55,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:34:55,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:34:55,510 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:34:55,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:55,510 INFO L85 PathProgramCache]: Analyzing trace with hash 201184795, now seen corresponding path program 1 times [2023-11-28 20:34:55,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:34:55,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698237263] [2023-11-28 20:34:55,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:55,510 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 [2023-11-28 20:34:55,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:34:55,511 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:34:55,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:34:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:55,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 20:34:55,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:55,602 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-28 20:34:55,603 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 [2023-11-28 20:34:55,619 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-28 20:34:55,620 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 [2023-11-28 20:34:55,636 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-28 20:34:55,636 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 [2023-11-28 20:34:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:34:55,716 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:34:55,716 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:34:55,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698237263] [2023-11-28 20:34:55,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698237263] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:34:55,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:34:55,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-28 20:34:55,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88782312] [2023-11-28 20:34:55,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:34:55,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:34:55,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:34:55,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:34:55,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:34:55,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2023-11-28 20:34:55,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 157 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:55,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:34:55,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2023-11-28 20:34:55,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:34:55,888 INFO L124 PetriNetUnfolderBase]: 87/216 cut-off events. [2023-11-28 20:34:55,888 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-28 20:34:55,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 216 events. 87/216 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 828 event pairs, 60 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 410. Up to 162 conditions per place. [2023-11-28 20:34:55,890 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 32 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-11-28 20:34:55,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 44 transitions, 219 flow [2023-11-28 20:34:55,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:34:55,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:34:55,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2023-11-28 20:34:55,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2023-11-28 20:34:55,892 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 87 transitions. [2023-11-28 20:34:55,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 87 transitions. [2023-11-28 20:34:55,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:34:55,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 87 transitions. [2023-11-28 20:34:55,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:55,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:55,893 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:55,894 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 157 flow. Second operand 3 states and 87 transitions. [2023-11-28 20:34:55,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 44 transitions, 219 flow [2023-11-28 20:34:55,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 44 transitions, 213 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-28 20:34:55,896 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 149 flow [2023-11-28 20:34:55,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2023-11-28 20:34:55,897 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 2 predicate places. [2023-11-28 20:34:55,897 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 149 flow [2023-11-28 20:34:55,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:55,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:34:55,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:34:55,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-28 20:34:56,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:34:56,098 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:34:56,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:56,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1941774478, now seen corresponding path program 1 times [2023-11-28 20:34:56,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:34:56,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051144104] [2023-11-28 20:34:56,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:56,099 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 [2023-11-28 20:34:56,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:34:56,100 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:34:56,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:34:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:56,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 20:34:56,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:56,170 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 [2023-11-28 20:34:56,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:56,184 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 [2023-11-28 20:34:56,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:56,190 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 [2023-11-28 20:34:56,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:56,196 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 [2023-11-28 20:34:56,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:56,204 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 [2023-11-28 20:34:56,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:56,208 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 [2023-11-28 20:34:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:34:56,235 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:34:56,235 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:34:56,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051144104] [2023-11-28 20:34:56,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051144104] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:34:56,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:34:56,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:34:56,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485246840] [2023-11-28 20:34:56,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:34:56,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:34:56,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:34:56,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:34:56,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:34:56,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 47 [2023-11-28 20:34:56,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:56,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:34:56,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 47 [2023-11-28 20:34:56,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:34:56,435 INFO L124 PetriNetUnfolderBase]: 78/175 cut-off events. [2023-11-28 20:34:56,435 INFO L125 PetriNetUnfolderBase]: For 12/15 co-relation queries the response was YES. [2023-11-28 20:34:56,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 175 events. 78/175 cut-off events. For 12/15 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 576 event pairs, 53 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 350. Up to 133 conditions per place. [2023-11-28 20:34:56,437 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 26 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2023-11-28 20:34:56,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 41 transitions, 205 flow [2023-11-28 20:34:56,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:34:56,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:34:56,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2023-11-28 20:34:56,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691489361702128 [2023-11-28 20:34:56,439 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 107 transitions. [2023-11-28 20:34:56,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 107 transitions. [2023-11-28 20:34:56,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:34:56,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 107 transitions. [2023-11-28 20:34:56,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 26.75) internal successors, (107), 4 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) [2023-11-28 20:34:56,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:56,440 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:56,440 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 149 flow. Second operand 4 states and 107 transitions. [2023-11-28 20:34:56,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 41 transitions, 205 flow [2023-11-28 20:34:56,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 41 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:34:56,443 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 152 flow [2023-11-28 20:34:56,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2023-11-28 20:34:56,444 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 1 predicate places. [2023-11-28 20:34:56,444 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 152 flow [2023-11-28 20:34:56,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:56,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:34:56,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:34:56,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:34:56,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:34:56,647 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:34:56,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:56,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1941774479, now seen corresponding path program 1 times [2023-11-28 20:34:56,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:34:56,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1092664731] [2023-11-28 20:34:56,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:56,647 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 [2023-11-28 20:34:56,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:34:56,648 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:34:56,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:34:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:56,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-28 20:34:56,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:56,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:34:56,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:34:56,975 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 35 treesize of output 31 [2023-11-28 20:34:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:34:57,086 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:34:57,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1092664731] [2023-11-28 20:34:57,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1092664731] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:34:57,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:34:57,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-28 20:34:57,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544761082] [2023-11-28 20:34:57,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:34:57,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 20:34:57,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:34:57,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 20:34:57,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:34:57,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 47 [2023-11-28 20:34:57,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 152 flow. Second operand has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:57,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:34:57,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 47 [2023-11-28 20:34:57,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:34:58,361 INFO L124 PetriNetUnfolderBase]: 151/311 cut-off events. [2023-11-28 20:34:58,362 INFO L125 PetriNetUnfolderBase]: For 14/17 co-relation queries the response was YES. [2023-11-28 20:34:58,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 311 events. 151/311 cut-off events. For 14/17 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1255 event pairs, 53 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 622. Up to 141 conditions per place. [2023-11-28 20:34:58,363 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 38 selfloop transitions, 8 changer transitions 0/55 dead transitions. [2023-11-28 20:34:58,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 55 transitions, 275 flow [2023-11-28 20:34:58,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:34:58,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-28 20:34:58,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2023-11-28 20:34:58,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6560283687943262 [2023-11-28 20:34:58,365 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 185 transitions. [2023-11-28 20:34:58,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 185 transitions. [2023-11-28 20:34:58,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:34:58,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 185 transitions. [2023-11-28 20:34:58,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 30.833333333333332) internal successors, (185), 6 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) [2023-11-28 20:34:58,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:58,366 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:58,367 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 152 flow. Second operand 6 states and 185 transitions. [2023-11-28 20:34:58,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 55 transitions, 275 flow [2023-11-28 20:34:58,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 269 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-28 20:34:58,368 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 173 flow [2023-11-28 20:34:58,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=173, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2023-11-28 20:34:58,369 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 5 predicate places. [2023-11-28 20:34:58,369 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 173 flow [2023-11-28 20:34:58,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:34:58,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:34:58,369 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:34:58,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-28 20:34:58,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:34:58,570 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:34:58,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:34:58,570 INFO L85 PathProgramCache]: Analyzing trace with hash 2029483155, now seen corresponding path program 1 times [2023-11-28 20:34:58,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:34:58,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732703047] [2023-11-28 20:34:58,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:34:58,571 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 [2023-11-28 20:34:58,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:34:58,572 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:34:58,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:34:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:34:58,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-28 20:34:58,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:34:58,679 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 18 treesize of output 7 [2023-11-28 20:34:58,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:58,692 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 13 treesize of output 1 [2023-11-28 20:34:58,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:58,703 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 13 treesize of output 1 [2023-11-28 20:34:58,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:58,710 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 8 treesize of output 1 [2023-11-28 20:34:58,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:58,718 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 8 treesize of output 1 [2023-11-28 20:34:58,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:34:58,728 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 13 treesize of output 1 [2023-11-28 20:34:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:34:58,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:34:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:34:59,821 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:34:59,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732703047] [2023-11-28 20:34:59,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732703047] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:34:59,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:34:59,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-11-28 20:34:59,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137078009] [2023-11-28 20:34:59,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:34:59,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-28 20:34:59,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:34:59,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-28 20:34:59,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-28 20:35:02,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2023-11-28 20:35:02,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 173 flow. Second operand has 11 states, 11 states have (on average 24.818181818181817) internal successors, (273), 11 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:02,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:35:02,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2023-11-28 20:35:02,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:35:04,761 INFO L124 PetriNetUnfolderBase]: 409/852 cut-off events. [2023-11-28 20:35:04,761 INFO L125 PetriNetUnfolderBase]: For 62/74 co-relation queries the response was YES. [2023-11-28 20:35:04,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1777 conditions, 852 events. 409/852 cut-off events. For 62/74 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4400 event pairs, 261 based on Foata normal form. 0/715 useless extension candidates. Maximal degree in co-relation 1762. Up to 261 conditions per place. [2023-11-28 20:35:04,768 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 68 selfloop transitions, 16 changer transitions 0/92 dead transitions. [2023-11-28 20:35:04,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 92 transitions, 461 flow [2023-11-28 20:35:04,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 20:35:04,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-28 20:35:04,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 312 transitions. [2023-11-28 20:35:04,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6638297872340425 [2023-11-28 20:35:04,771 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 312 transitions. [2023-11-28 20:35:04,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 312 transitions. [2023-11-28 20:35:04,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:35:04,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 312 transitions. [2023-11-28 20:35:04,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 31.2) internal successors, (312), 10 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:04,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 47.0) internal successors, (517), 11 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:04,775 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 47.0) internal successors, (517), 11 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:04,775 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 173 flow. Second operand 10 states and 312 transitions. [2023-11-28 20:35:04,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 92 transitions, 461 flow [2023-11-28 20:35:04,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 92 transitions, 452 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-28 20:35:04,779 INFO L231 Difference]: Finished difference. Result has 61 places, 48 transitions, 234 flow [2023-11-28 20:35:04,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=234, PETRI_PLACES=61, PETRI_TRANSITIONS=48} [2023-11-28 20:35:04,779 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 13 predicate places. [2023-11-28 20:35:04,780 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 48 transitions, 234 flow [2023-11-28 20:35:04,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 24.818181818181817) internal successors, (273), 11 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:04,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:35:04,780 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-28 20:35:04,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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)] Ended with exit code 0 [2023-11-28 20:35:04,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:35:04,983 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:35:04,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:04,983 INFO L85 PathProgramCache]: Analyzing trace with hash 203067881, now seen corresponding path program 2 times [2023-11-28 20:35:04,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:35:04,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931489808] [2023-11-28 20:35:04,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:35:04,984 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 [2023-11-28 20:35:04,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:35:04,985 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:35:04,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:35:05,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:35:05,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:35:05,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:35:05,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:05,089 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 13 treesize of output 7 [2023-11-28 20:35:05,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:05,099 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 8 treesize of output 1 [2023-11-28 20:35:05,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:05,110 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 13 treesize of output 1 [2023-11-28 20:35:05,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:05,116 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 8 treesize of output 1 [2023-11-28 20:35:05,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:05,138 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 18 treesize of output 1 [2023-11-28 20:35:05,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:05,149 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 13 treesize of output 1 [2023-11-28 20:35:05,397 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:35:05,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:35:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:35:06,269 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:35:06,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931489808] [2023-11-28 20:35:06,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931489808] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:35:06,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:35:06,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-28 20:35:06,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022710446] [2023-11-28 20:35:06,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:35:06,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-28 20:35:06,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:35:06,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-28 20:35:06,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-28 20:35:08,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 47 [2023-11-28 20:35:08,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 48 transitions, 234 flow. Second operand has 14 states, 14 states have (on average 25.571428571428573) internal successors, (358), 14 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:08,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:35:08,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 47 [2023-11-28 20:35:08,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:35:12,011 INFO L124 PetriNetUnfolderBase]: 398/853 cut-off events. [2023-11-28 20:35:12,011 INFO L125 PetriNetUnfolderBase]: For 295/307 co-relation queries the response was YES. [2023-11-28 20:35:12,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2010 conditions, 853 events. 398/853 cut-off events. For 295/307 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4466 event pairs, 306 based on Foata normal form. 6/804 useless extension candidates. Maximal degree in co-relation 1993. Up to 699 conditions per place. [2023-11-28 20:35:12,017 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 28 selfloop transitions, 29 changer transitions 0/66 dead transitions. [2023-11-28 20:35:12,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 66 transitions, 492 flow [2023-11-28 20:35:12,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-28 20:35:12,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-28 20:35:12,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 560 transitions. [2023-11-28 20:35:12,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2023-11-28 20:35:12,020 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 560 transitions. [2023-11-28 20:35:12,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 560 transitions. [2023-11-28 20:35:12,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:35:12,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 560 transitions. [2023-11-28 20:35:12,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 26.666666666666668) internal successors, (560), 21 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) [2023-11-28 20:35:12,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 47.0) internal successors, (1034), 22 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:12,034 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 47.0) internal successors, (1034), 22 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:12,034 INFO L175 Difference]: Start difference. First operand has 61 places, 48 transitions, 234 flow. Second operand 21 states and 560 transitions. [2023-11-28 20:35:12,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 66 transitions, 492 flow [2023-11-28 20:35:12,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 66 transitions, 484 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-28 20:35:12,038 INFO L231 Difference]: Finished difference. Result has 84 places, 66 transitions, 458 flow [2023-11-28 20:35:12,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=458, PETRI_PLACES=84, PETRI_TRANSITIONS=66} [2023-11-28 20:35:12,039 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 36 predicate places. [2023-11-28 20:35:12,039 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 66 transitions, 458 flow [2023-11-28 20:35:12,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 25.571428571428573) internal successors, (358), 14 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:12,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:35:12,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:12,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-11-28 20:35:12,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:35:12,240 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:35:12,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:12,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1888842189, now seen corresponding path program 1 times [2023-11-28 20:35:12,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:35:12,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724185672] [2023-11-28 20:35:12,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:12,241 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 [2023-11-28 20:35:12,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:35:12,242 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:35:12,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:35:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:12,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-28 20:35:12,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:12,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:35:12,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:35:12,669 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 35 treesize of output 31 [2023-11-28 20:35:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:35:12,787 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:35:12,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724185672] [2023-11-28 20:35:12,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724185672] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:35:12,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:35:12,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-28 20:35:12,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426721167] [2023-11-28 20:35:12,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:35:12,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 20:35:12,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:35:12,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 20:35:12,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:35:13,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2023-11-28 20:35:13,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 66 transitions, 458 flow. Second operand has 8 states, 8 states have (on average 25.5) internal successors, (204), 8 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:13,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:35:13,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2023-11-28 20:35:13,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:35:14,127 INFO L124 PetriNetUnfolderBase]: 743/1381 cut-off events. [2023-11-28 20:35:14,127 INFO L125 PetriNetUnfolderBase]: For 692/714 co-relation queries the response was YES. [2023-11-28 20:35:14,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3396 conditions, 1381 events. 743/1381 cut-off events. For 692/714 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7163 event pairs, 243 based on Foata normal form. 0/1182 useless extension candidates. Maximal degree in co-relation 3372. Up to 763 conditions per place. [2023-11-28 20:35:14,137 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 62 selfloop transitions, 14 changer transitions 0/84 dead transitions. [2023-11-28 20:35:14,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 84 transitions, 684 flow [2023-11-28 20:35:14,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:35:14,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-28 20:35:14,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2023-11-28 20:35:14,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6276595744680851 [2023-11-28 20:35:14,138 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 177 transitions. [2023-11-28 20:35:14,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 177 transitions. [2023-11-28 20:35:14,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:35:14,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 177 transitions. [2023-11-28 20:35:14,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 29.5) internal successors, (177), 6 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:14,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:14,140 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 47.0) internal successors, (329), 7 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:14,140 INFO L175 Difference]: Start difference. First operand has 84 places, 66 transitions, 458 flow. Second operand 6 states and 177 transitions. [2023-11-28 20:35:14,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 84 transitions, 684 flow [2023-11-28 20:35:14,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 84 transitions, 596 flow, removed 33 selfloop flow, removed 8 redundant places. [2023-11-28 20:35:14,146 INFO L231 Difference]: Finished difference. Result has 82 places, 67 transitions, 415 flow [2023-11-28 20:35:14,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=415, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2023-11-28 20:35:14,147 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 34 predicate places. [2023-11-28 20:35:14,148 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 415 flow [2023-11-28 20:35:14,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 25.5) internal successors, (204), 8 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:14,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:35:14,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:14,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:35:14,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:35:14,351 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:35:14,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:14,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1575434776, now seen corresponding path program 1 times [2023-11-28 20:35:14,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:35:14,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628079011] [2023-11-28 20:35:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:14,352 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 [2023-11-28 20:35:14,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:35:14,353 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:35:14,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:35:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:14,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-28 20:35:14,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:14,478 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 18 treesize of output 7 [2023-11-28 20:35:14,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:14,493 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 13 treesize of output 1 [2023-11-28 20:35:14,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:14,504 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 13 treesize of output 1 [2023-11-28 20:35:14,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:14,511 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 8 treesize of output 1 [2023-11-28 20:35:14,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:14,520 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 8 treesize of output 1 [2023-11-28 20:35:14,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:14,530 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 13 treesize of output 1 [2023-11-28 20:35:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:35:14,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:35:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:35:15,810 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:35:15,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628079011] [2023-11-28 20:35:15,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628079011] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:35:15,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:35:15,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2023-11-28 20:35:15,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353670113] [2023-11-28 20:35:15,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:35:15,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-28 20:35:15,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:35:15,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-28 20:35:15,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-28 20:35:20,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 47 [2023-11-28 20:35:20,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 415 flow. Second operand has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:20,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:35:20,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 47 [2023-11-28 20:35:20,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:35:22,215 INFO L124 PetriNetUnfolderBase]: 651/1213 cut-off events. [2023-11-28 20:35:22,215 INFO L125 PetriNetUnfolderBase]: For 682/711 co-relation queries the response was YES. [2023-11-28 20:35:22,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3118 conditions, 1213 events. 651/1213 cut-off events. For 682/711 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5980 event pairs, 411 based on Foata normal form. 4/1086 useless extension candidates. Maximal degree in co-relation 3093. Up to 443 conditions per place. [2023-11-28 20:35:22,223 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 78 selfloop transitions, 26 changer transitions 0/111 dead transitions. [2023-11-28 20:35:22,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 111 transitions, 757 flow [2023-11-28 20:35:22,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 20:35:22,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-28 20:35:22,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 301 transitions. [2023-11-28 20:35:22,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6404255319148936 [2023-11-28 20:35:22,236 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 301 transitions. [2023-11-28 20:35:22,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 301 transitions. [2023-11-28 20:35:22,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:35:22,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 301 transitions. [2023-11-28 20:35:22,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:22,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 47.0) internal successors, (517), 11 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:22,238 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 47.0) internal successors, (517), 11 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:22,238 INFO L175 Difference]: Start difference. First operand has 82 places, 67 transitions, 415 flow. Second operand 10 states and 301 transitions. [2023-11-28 20:35:22,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 111 transitions, 757 flow [2023-11-28 20:35:22,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 111 transitions, 738 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-28 20:35:22,243 INFO L231 Difference]: Finished difference. Result has 89 places, 71 transitions, 474 flow [2023-11-28 20:35:22,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=474, PETRI_PLACES=89, PETRI_TRANSITIONS=71} [2023-11-28 20:35:22,244 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 41 predicate places. [2023-11-28 20:35:22,245 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 71 transitions, 474 flow [2023-11-28 20:35:22,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 24.0) internal successors, (264), 11 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:22,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:35:22,245 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:22,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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)] Ended with exit code 0 [2023-11-28 20:35:22,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:35:22,448 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:35:22,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:22,448 INFO L85 PathProgramCache]: Analyzing trace with hash 773291061, now seen corresponding path program 2 times [2023-11-28 20:35:22,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:35:22,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302581530] [2023-11-28 20:35:22,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:35:22,449 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 [2023-11-28 20:35:22,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:35:22,449 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:35:22,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:35:22,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-28 20:35:22,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:35:22,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:35:22,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:22,526 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 8 treesize of output 7 [2023-11-28 20:35:22,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:22,538 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 13 treesize of output 1 [2023-11-28 20:35:22,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:22,555 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 18 treesize of output 1 [2023-11-28 20:35:22,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:22,564 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 13 treesize of output 1 [2023-11-28 20:35:22,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:22,572 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 13 treesize of output 1 [2023-11-28 20:35:22,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:22,579 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 8 treesize of output 1 [2023-11-28 20:35:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-28 20:35:22,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:35:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-28 20:35:23,536 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:35:23,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302581530] [2023-11-28 20:35:23,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302581530] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:35:23,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:35:23,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-28 20:35:23,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818149944] [2023-11-28 20:35:23,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:35:23,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 20:35:23,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:35:23,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 20:35:23,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:35:25,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 47 [2023-11-28 20:35:25,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 71 transitions, 474 flow. Second operand has 8 states, 8 states have (on average 26.5) internal successors, (212), 8 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:25,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:35:25,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 47 [2023-11-28 20:35:25,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:35:26,489 INFO L124 PetriNetUnfolderBase]: 605/1158 cut-off events. [2023-11-28 20:35:26,490 INFO L125 PetriNetUnfolderBase]: For 562/577 co-relation queries the response was YES. [2023-11-28 20:35:26,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3144 conditions, 1158 events. 605/1158 cut-off events. For 562/577 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5935 event pairs, 351 based on Foata normal form. 18/1169 useless extension candidates. Maximal degree in co-relation 3117. Up to 793 conditions per place. [2023-11-28 20:35:26,501 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 54 selfloop transitions, 20 changer transitions 0/83 dead transitions. [2023-11-28 20:35:26,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 83 transitions, 661 flow [2023-11-28 20:35:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:35:26,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 20:35:26,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2023-11-28 20:35:26,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340425531914894 [2023-11-28 20:35:26,502 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 149 transitions. [2023-11-28 20:35:26,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 149 transitions. [2023-11-28 20:35:26,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:35:26,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 149 transitions. [2023-11-28 20:35:26,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:26,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 47.0) internal successors, (282), 6 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:26,504 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 47.0) internal successors, (282), 6 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:26,504 INFO L175 Difference]: Start difference. First operand has 89 places, 71 transitions, 474 flow. Second operand 5 states and 149 transitions. [2023-11-28 20:35:26,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 83 transitions, 661 flow [2023-11-28 20:35:26,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 630 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-28 20:35:26,509 INFO L231 Difference]: Finished difference. Result has 86 places, 70 transitions, 475 flow [2023-11-28 20:35:26,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=475, PETRI_PLACES=86, PETRI_TRANSITIONS=70} [2023-11-28 20:35:26,510 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 38 predicate places. [2023-11-28 20:35:26,510 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 70 transitions, 475 flow [2023-11-28 20:35:26,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.5) internal successors, (212), 8 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:26,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:35:26,510 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:26,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:35:26,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:35:26,711 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:35:26,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:26,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1260642618, now seen corresponding path program 2 times [2023-11-28 20:35:26,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:35:26,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113856206] [2023-11-28 20:35:26,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:35:26,712 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 [2023-11-28 20:35:26,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:35:26,713 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:35:26,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:35:26,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-28 20:35:26,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:35:26,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-28 20:35:26,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:26,814 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 13 treesize of output 7 [2023-11-28 20:35:26,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:26,823 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 8 treesize of output 1 [2023-11-28 20:35:26,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:26,834 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 13 treesize of output 1 [2023-11-28 20:35:26,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:26,852 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 18 treesize of output 1 [2023-11-28 20:35:26,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:26,858 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 8 treesize of output 1 [2023-11-28 20:35:26,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:26,866 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 13 treesize of output 1 [2023-11-28 20:35:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-28 20:35:27,059 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:35:27,059 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:35:27,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113856206] [2023-11-28 20:35:27,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113856206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:35:27,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:35:27,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:35:27,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771710347] [2023-11-28 20:35:27,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:27,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:35:27,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:35:27,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:35:27,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:35:27,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 47 [2023-11-28 20:35:27,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 70 transitions, 475 flow. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:27,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:35:27,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 47 [2023-11-28 20:35:27,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:35:27,683 INFO L124 PetriNetUnfolderBase]: 605/1136 cut-off events. [2023-11-28 20:35:27,683 INFO L125 PetriNetUnfolderBase]: For 959/971 co-relation queries the response was YES. [2023-11-28 20:35:27,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3205 conditions, 1136 events. 605/1136 cut-off events. For 959/971 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5591 event pairs, 306 based on Foata normal form. 36/1165 useless extension candidates. Maximal degree in co-relation 3179. Up to 658 conditions per place. [2023-11-28 20:35:27,690 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 57 selfloop transitions, 17 changer transitions 0/81 dead transitions. [2023-11-28 20:35:27,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 81 transitions, 684 flow [2023-11-28 20:35:27,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:35:27,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 20:35:27,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2023-11-28 20:35:27,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6085106382978723 [2023-11-28 20:35:27,692 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 143 transitions. [2023-11-28 20:35:27,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 143 transitions. [2023-11-28 20:35:27,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:35:27,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 143 transitions. [2023-11-28 20:35:27,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:27,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 47.0) internal successors, (282), 6 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:27,693 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 47.0) internal successors, (282), 6 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:27,693 INFO L175 Difference]: Start difference. First operand has 86 places, 70 transitions, 475 flow. Second operand 5 states and 143 transitions. [2023-11-28 20:35:27,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 81 transitions, 684 flow [2023-11-28 20:35:27,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 81 transitions, 622 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-28 20:35:27,697 INFO L231 Difference]: Finished difference. Result has 82 places, 68 transitions, 451 flow [2023-11-28 20:35:27,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=451, PETRI_PLACES=82, PETRI_TRANSITIONS=68} [2023-11-28 20:35:27,698 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 34 predicate places. [2023-11-28 20:35:27,698 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 68 transitions, 451 flow [2023-11-28 20:35:27,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:27,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:35:27,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:27,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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)] Ended with exit code 0 [2023-11-28 20:35:27,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:35:27,899 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:35:27,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:27,899 INFO L85 PathProgramCache]: Analyzing trace with hash -981465725, now seen corresponding path program 1 times [2023-11-28 20:35:27,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:35:27,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [367545907] [2023-11-28 20:35:27,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:27,899 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 [2023-11-28 20:35:27,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:35:27,900 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:35:27,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:35:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:27,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:35:27,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:28,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:35:28,067 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:35:28,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:35:28,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [367545907] [2023-11-28 20:35:28,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [367545907] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:35:28,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:35:28,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:35:28,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682984874] [2023-11-28 20:35:28,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:28,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:35:28,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:35:28,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:35:28,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:35:28,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2023-11-28 20:35:28,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 68 transitions, 451 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:28,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:35:28,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2023-11-28 20:35:28,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:35:28,308 INFO L124 PetriNetUnfolderBase]: 605/1141 cut-off events. [2023-11-28 20:35:28,308 INFO L125 PetriNetUnfolderBase]: For 571/580 co-relation queries the response was YES. [2023-11-28 20:35:28,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3101 conditions, 1141 events. 605/1141 cut-off events. For 571/580 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5650 event pairs, 187 based on Foata normal form. 3/1138 useless extension candidates. Maximal degree in co-relation 3077. Up to 784 conditions per place. [2023-11-28 20:35:28,315 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 74 selfloop transitions, 5 changer transitions 1/87 dead transitions. [2023-11-28 20:35:28,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 87 transitions, 684 flow [2023-11-28 20:35:28,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:35:28,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-28 20:35:28,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 109 transitions. [2023-11-28 20:35:28,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7730496453900709 [2023-11-28 20:35:28,317 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 109 transitions. [2023-11-28 20:35:28,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 109 transitions. [2023-11-28 20:35:28,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:35:28,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 109 transitions. [2023-11-28 20:35:28,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2023-11-28 20:35:28,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:28,317 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:28,318 INFO L175 Difference]: Start difference. First operand has 82 places, 68 transitions, 451 flow. Second operand 3 states and 109 transitions. [2023-11-28 20:35:28,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 87 transitions, 684 flow [2023-11-28 20:35:28,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 87 transitions, 644 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-28 20:35:28,323 INFO L231 Difference]: Finished difference. Result has 81 places, 72 transitions, 464 flow [2023-11-28 20:35:28,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=464, PETRI_PLACES=81, PETRI_TRANSITIONS=72} [2023-11-28 20:35:28,323 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 33 predicate places. [2023-11-28 20:35:28,323 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 72 transitions, 464 flow [2023-11-28 20:35:28,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:28,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:35:28,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:28,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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)] Ended with exit code 0 [2023-11-28 20:35:28,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:35:28,524 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:35:28,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:28,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1864116453, now seen corresponding path program 1 times [2023-11-28 20:35:28,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:35:28,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075740691] [2023-11-28 20:35:28,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:35:28,525 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 [2023-11-28 20:35:28,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:35:28,526 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:35:28,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:35:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:35:28,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:35:28,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:35:28,665 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:35:28,666 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:35:28,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075740691] [2023-11-28 20:35:28,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075740691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:35:28,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:35:28,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:35:28,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581910788] [2023-11-28 20:35:28,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:28,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:35:28,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:35:28,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:35:28,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:35:28,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2023-11-28 20:35:28,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 72 transitions, 464 flow. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:28,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:35:28,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2023-11-28 20:35:28,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:35:28,915 INFO L124 PetriNetUnfolderBase]: 683/1268 cut-off events. [2023-11-28 20:35:28,915 INFO L125 PetriNetUnfolderBase]: For 686/695 co-relation queries the response was YES. [2023-11-28 20:35:28,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3546 conditions, 1268 events. 683/1268 cut-off events. For 686/695 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 6304 event pairs, 148 based on Foata normal form. 30/1292 useless extension candidates. Maximal degree in co-relation 3521. Up to 894 conditions per place. [2023-11-28 20:35:28,923 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 87 selfloop transitions, 9 changer transitions 1/104 dead transitions. [2023-11-28 20:35:28,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 104 transitions, 792 flow [2023-11-28 20:35:28,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:35:28,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:35:28,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 139 transitions. [2023-11-28 20:35:28,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7393617021276596 [2023-11-28 20:35:28,924 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 139 transitions. [2023-11-28 20:35:28,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 139 transitions. [2023-11-28 20:35:28,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:35:28,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 139 transitions. [2023-11-28 20:35:28,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 34.75) internal successors, (139), 4 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) [2023-11-28 20:35:28,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:28,926 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:28,926 INFO L175 Difference]: Start difference. First operand has 81 places, 72 transitions, 464 flow. Second operand 4 states and 139 transitions. [2023-11-28 20:35:28,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 104 transitions, 792 flow [2023-11-28 20:35:28,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 104 transitions, 783 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:35:28,930 INFO L231 Difference]: Finished difference. Result has 86 places, 81 transitions, 553 flow [2023-11-28 20:35:28,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=553, PETRI_PLACES=86, PETRI_TRANSITIONS=81} [2023-11-28 20:35:28,931 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 38 predicate places. [2023-11-28 20:35:28,931 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 81 transitions, 553 flow [2023-11-28 20:35:28,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:28,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:35:28,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:28,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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)] Ended with exit code 0 [2023-11-28 20:35:29,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:35:29,132 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:35:29,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:29,132 INFO L85 PathProgramCache]: Analyzing trace with hash -482249861, now seen corresponding path program 2 times [2023-11-28 20:35:29,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:35:29,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787067013] [2023-11-28 20:35:29,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:35:29,132 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 [2023-11-28 20:35:29,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:35:29,133 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:35:29,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:35:29,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:35:29,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:35:29,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:35:29,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:35:29,254 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:35:29,254 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:35:29,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787067013] [2023-11-28 20:35:29,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1787067013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:35:29,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:35:29,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:35:29,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852888082] [2023-11-28 20:35:29,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:29,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:35:29,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:35:29,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:35:29,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:35:29,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2023-11-28 20:35:29,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 81 transitions, 553 flow. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:29,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:35:29,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2023-11-28 20:35:29,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:35:29,525 INFO L124 PetriNetUnfolderBase]: 671/1292 cut-off events. [2023-11-28 20:35:29,525 INFO L125 PetriNetUnfolderBase]: For 1396/1404 co-relation queries the response was YES. [2023-11-28 20:35:29,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4016 conditions, 1292 events. 671/1292 cut-off events. For 1396/1404 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6761 event pairs, 262 based on Foata normal form. 19/1308 useless extension candidates. Maximal degree in co-relation 3989. Up to 745 conditions per place. [2023-11-28 20:35:29,534 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 98 selfloop transitions, 7 changer transitions 1/113 dead transitions. [2023-11-28 20:35:29,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 113 transitions, 938 flow [2023-11-28 20:35:29,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:35:29,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:35:29,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2023-11-28 20:35:29,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7287234042553191 [2023-11-28 20:35:29,535 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 137 transitions. [2023-11-28 20:35:29,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 137 transitions. [2023-11-28 20:35:29,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:35:29,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 137 transitions. [2023-11-28 20:35:29,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:29,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:29,537 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:29,537 INFO L175 Difference]: Start difference. First operand has 86 places, 81 transitions, 553 flow. Second operand 4 states and 137 transitions. [2023-11-28 20:35:29,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 113 transitions, 938 flow [2023-11-28 20:35:29,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 113 transitions, 938 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-28 20:35:29,543 INFO L231 Difference]: Finished difference. Result has 91 places, 82 transitions, 593 flow [2023-11-28 20:35:29,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=593, PETRI_PLACES=91, PETRI_TRANSITIONS=82} [2023-11-28 20:35:29,543 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 43 predicate places. [2023-11-28 20:35:29,543 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 82 transitions, 593 flow [2023-11-28 20:35:29,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:29,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:35:29,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:29,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-11-28 20:35:29,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:35:29,744 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:35:29,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:29,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1440589865, now seen corresponding path program 3 times [2023-11-28 20:35:29,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:35:29,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753215343] [2023-11-28 20:35:29,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:35:29,745 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 [2023-11-28 20:35:29,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:35:29,746 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:35:29,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:35:29,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-28 20:35:29,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:35:29,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 20:35:29,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:35:29,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:35:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:35:30,036 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:35:30,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753215343] [2023-11-28 20:35:30,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753215343] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:35:30,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:35:30,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-28 20:35:30,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966667297] [2023-11-28 20:35:30,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:35:30,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-28 20:35:30,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:35:30,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-28 20:35:30,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-28 20:35:30,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2023-11-28 20:35:30,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 82 transitions, 593 flow. Second operand has 10 states, 10 states have (on average 27.5) internal successors, (275), 10 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:30,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:35:30,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2023-11-28 20:35:30,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:35:31,144 INFO L124 PetriNetUnfolderBase]: 1289/2479 cut-off events. [2023-11-28 20:35:31,144 INFO L125 PetriNetUnfolderBase]: For 4763/4779 co-relation queries the response was YES. [2023-11-28 20:35:31,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8641 conditions, 2479 events. 1289/2479 cut-off events. For 4763/4779 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15244 event pairs, 70 based on Foata normal form. 133/2612 useless extension candidates. Maximal degree in co-relation 8611. Up to 573 conditions per place. [2023-11-28 20:35:31,162 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 132 selfloop transitions, 110 changer transitions 4/253 dead transitions. [2023-11-28 20:35:31,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 253 transitions, 2071 flow [2023-11-28 20:35:31,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-28 20:35:31,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-28 20:35:31,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 444 transitions. [2023-11-28 20:35:31,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7266775777414075 [2023-11-28 20:35:31,164 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 444 transitions. [2023-11-28 20:35:31,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 444 transitions. [2023-11-28 20:35:31,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:35:31,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 444 transitions. [2023-11-28 20:35:31,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 34.15384615384615) internal successors, (444), 13 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:31,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 47.0) internal successors, (658), 14 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:31,168 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 47.0) internal successors, (658), 14 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:31,168 INFO L175 Difference]: Start difference. First operand has 91 places, 82 transitions, 593 flow. Second operand 13 states and 444 transitions. [2023-11-28 20:35:31,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 253 transitions, 2071 flow [2023-11-28 20:35:31,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 253 transitions, 2027 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-28 20:35:31,180 INFO L231 Difference]: Finished difference. Result has 111 places, 191 transitions, 1771 flow [2023-11-28 20:35:31,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1771, PETRI_PLACES=111, PETRI_TRANSITIONS=191} [2023-11-28 20:35:31,181 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 63 predicate places. [2023-11-28 20:35:31,181 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 191 transitions, 1771 flow [2023-11-28 20:35:31,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.5) internal successors, (275), 10 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:31,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:35:31,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:35:31,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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)] Ended with exit code 0 [2023-11-28 20:35:31,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:35:31,382 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:35:31,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:31,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1426564965, now seen corresponding path program 4 times [2023-11-28 20:35:31,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:35:31,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133827268] [2023-11-28 20:35:31,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 20:35:31,383 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 [2023-11-28 20:35:31,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:35:31,384 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:35:31,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-28 20:35:31,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 20:35:31,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:35:31,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:35:31,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:35:31,500 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:35:31,501 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:35:31,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133827268] [2023-11-28 20:35:31,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133827268] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:35:31,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:35:31,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:35:31,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185191651] [2023-11-28 20:35:31,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:35:31,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:35:31,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:35:31,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:35:31,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:35:31,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2023-11-28 20:35:31,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 191 transitions, 1771 flow. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:31,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:35:31,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2023-11-28 20:35:31,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:35:31,972 INFO L124 PetriNetUnfolderBase]: 1316/2482 cut-off events. [2023-11-28 20:35:31,972 INFO L125 PetriNetUnfolderBase]: For 11941/11955 co-relation queries the response was YES. [2023-11-28 20:35:31,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12336 conditions, 2482 events. 1316/2482 cut-off events. For 11941/11955 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14874 event pairs, 283 based on Foata normal form. 33/2512 useless extension candidates. Maximal degree in co-relation 12297. Up to 1258 conditions per place. [2023-11-28 20:35:31,991 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 194 selfloop transitions, 58 changer transitions 2/261 dead transitions. [2023-11-28 20:35:31,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 261 transitions, 2962 flow [2023-11-28 20:35:31,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:35:31,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:35:31,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2023-11-28 20:35:31,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7340425531914894 [2023-11-28 20:35:31,992 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 138 transitions. [2023-11-28 20:35:31,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 138 transitions. [2023-11-28 20:35:31,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:35:31,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 138 transitions. [2023-11-28 20:35:31,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:31,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:31,993 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:31,993 INFO L175 Difference]: Start difference. First operand has 111 places, 191 transitions, 1771 flow. Second operand 4 states and 138 transitions. [2023-11-28 20:35:31,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 261 transitions, 2962 flow [2023-11-28 20:35:32,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 261 transitions, 2843 flow, removed 44 selfloop flow, removed 1 redundant places. [2023-11-28 20:35:32,048 INFO L231 Difference]: Finished difference. Result has 114 places, 214 transitions, 2118 flow [2023-11-28 20:35:32,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2118, PETRI_PLACES=114, PETRI_TRANSITIONS=214} [2023-11-28 20:35:32,048 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 66 predicate places. [2023-11-28 20:35:32,048 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 214 transitions, 2118 flow [2023-11-28 20:35:32,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:32,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:35:32,049 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2023-11-28 20:35:32,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-11-28 20:35:32,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:35:32,257 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:35:32,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:35:32,257 INFO L85 PathProgramCache]: Analyzing trace with hash -475340883, now seen corresponding path program 3 times [2023-11-28 20:35:32,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:35:32,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014359872] [2023-11-28 20:35:32,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:35:32,258 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 [2023-11-28 20:35:32,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:35:32,259 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:35:32,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-28 20:35:32,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-28 20:35:32,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:35:32,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-28 20:35:32,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:35:32,517 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 13 treesize of output 7 [2023-11-28 20:35:32,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:32,525 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 8 treesize of output 1 [2023-11-28 20:35:32,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:32,536 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 13 treesize of output 1 [2023-11-28 20:35:32,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:32,552 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 18 treesize of output 1 [2023-11-28 20:35:32,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:32,562 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 13 treesize of output 1 [2023-11-28 20:35:32,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-28 20:35:32,567 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 8 treesize of output 1 [2023-11-28 20:35:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:35:33,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:35:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:35:36,483 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:35:36,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014359872] [2023-11-28 20:35:36,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014359872] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:35:36,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:35:36,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-11-28 20:35:36,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091243374] [2023-11-28 20:35:36,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:35:36,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-28 20:35:36,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:35:36,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-28 20:35:36,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2023-11-28 20:35:48,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 47 [2023-11-28 20:35:48,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 214 transitions, 2118 flow. Second operand has 26 states, 26 states have (on average 25.76923076923077) internal successors, (670), 26 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:35:48,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:35:48,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 47 [2023-11-28 20:35:48,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:36:02,710 WARN L293 SmtUtils]: Spent 5.91s on a formula simplification. DAG size of input: 121 DAG size of output: 120 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-28 20:36:28,161 INFO L124 PetriNetUnfolderBase]: 1289/2410 cut-off events. [2023-11-28 20:36:28,161 INFO L125 PetriNetUnfolderBase]: For 12043/12055 co-relation queries the response was YES. [2023-11-28 20:36:28,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12476 conditions, 2410 events. 1289/2410 cut-off events. For 12043/12055 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14049 event pairs, 541 based on Foata normal form. 12/2416 useless extension candidates. Maximal degree in co-relation 12435. Up to 2226 conditions per place. [2023-11-28 20:36:28,182 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 179 selfloop transitions, 65 changer transitions 0/250 dead transitions. [2023-11-28 20:36:28,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 250 transitions, 2918 flow [2023-11-28 20:36:28,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-28 20:36:28,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-28 20:36:28,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 1178 transitions. [2023-11-28 20:36:28,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5569739952718676 [2023-11-28 20:36:28,186 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 1178 transitions. [2023-11-28 20:36:28,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 1178 transitions. [2023-11-28 20:36:28,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:36:28,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 1178 transitions. [2023-11-28 20:36:28,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 26.177777777777777) internal successors, (1178), 45 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:28,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 47.0) internal successors, (2162), 46 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:28,192 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 47.0) internal successors, (2162), 46 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:28,192 INFO L175 Difference]: Start difference. First operand has 114 places, 214 transitions, 2118 flow. Second operand 45 states and 1178 transitions. [2023-11-28 20:36:28,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 250 transitions, 2918 flow [2023-11-28 20:36:28,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 250 transitions, 2860 flow, removed 13 selfloop flow, removed 3 redundant places. [2023-11-28 20:36:28,233 INFO L231 Difference]: Finished difference. Result has 166 places, 250 transitions, 2556 flow [2023-11-28 20:36:28,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2060, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=2556, PETRI_PLACES=166, PETRI_TRANSITIONS=250} [2023-11-28 20:36:28,234 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 118 predicate places. [2023-11-28 20:36:28,234 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 250 transitions, 2556 flow [2023-11-28 20:36:28,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 25.76923076923077) internal successors, (670), 26 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:28,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:36:28,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:28,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-11-28 20:36:28,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:36:28,435 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:36:28,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:28,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1025686234, now seen corresponding path program 1 times [2023-11-28 20:36:28,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:36:28,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536884018] [2023-11-28 20:36:28,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:28,435 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 [2023-11-28 20:36:28,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:36:28,436 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:36:28,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-28 20:36:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:28,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:36:28,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:36:28,610 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:36:28,610 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:36:28,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536884018] [2023-11-28 20:36:28,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536884018] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:36:28,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:36:28,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:36:28,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630985954] [2023-11-28 20:36:28,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:28,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:36:28,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:36:28,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:36:28,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:36:28,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2023-11-28 20:36:28,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 250 transitions, 2556 flow. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:28,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:36:28,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2023-11-28 20:36:28,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:36:29,209 INFO L124 PetriNetUnfolderBase]: 1343/2467 cut-off events. [2023-11-28 20:36:29,210 INFO L125 PetriNetUnfolderBase]: For 10083/10083 co-relation queries the response was YES. [2023-11-28 20:36:29,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12593 conditions, 2467 events. 1343/2467 cut-off events. For 10083/10083 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14189 event pairs, 185 based on Foata normal form. 18/2479 useless extension candidates. Maximal degree in co-relation 12540. Up to 1968 conditions per place. [2023-11-28 20:36:29,231 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 241 selfloop transitions, 30 changer transitions 0/278 dead transitions. [2023-11-28 20:36:29,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 278 transitions, 3342 flow [2023-11-28 20:36:29,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:36:29,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:36:29,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2023-11-28 20:36:29,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7287234042553191 [2023-11-28 20:36:29,232 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 137 transitions. [2023-11-28 20:36:29,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 137 transitions. [2023-11-28 20:36:29,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:36:29,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 137 transitions. [2023-11-28 20:36:29,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:29,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:29,233 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:29,234 INFO L175 Difference]: Start difference. First operand has 166 places, 250 transitions, 2556 flow. Second operand 4 states and 137 transitions. [2023-11-28 20:36:29,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 278 transitions, 3342 flow [2023-11-28 20:36:29,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 278 transitions, 3158 flow, removed 63 selfloop flow, removed 20 redundant places. [2023-11-28 20:36:29,291 INFO L231 Difference]: Finished difference. Result has 151 places, 260 transitions, 2601 flow [2023-11-28 20:36:29,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2372, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2601, PETRI_PLACES=151, PETRI_TRANSITIONS=260} [2023-11-28 20:36:29,292 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 103 predicate places. [2023-11-28 20:36:29,292 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 260 transitions, 2601 flow [2023-11-28 20:36:29,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:29,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:36:29,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:29,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2023-11-28 20:36:29,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:36:29,493 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:36:29,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:29,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1496685416, now seen corresponding path program 2 times [2023-11-28 20:36:29,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:36:29,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353992374] [2023-11-28 20:36:29,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:36:29,493 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 [2023-11-28 20:36:29,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:36:29,494 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:36:29,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-11-28 20:36:29,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:36:29,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:36:29,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-28 20:36:29,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:36:29,648 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:36:29,648 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:36:29,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353992374] [2023-11-28 20:36:29,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1353992374] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:36:29,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:36:29,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 20:36:29,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655745558] [2023-11-28 20:36:29,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:36:29,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:36:29,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:36:29,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:36:29,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:36:29,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2023-11-28 20:36:29,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 260 transitions, 2601 flow. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:29,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:36:29,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2023-11-28 20:36:29,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:36:30,264 INFO L124 PetriNetUnfolderBase]: 1283/2357 cut-off events. [2023-11-28 20:36:30,264 INFO L125 PetriNetUnfolderBase]: For 11816/11823 co-relation queries the response was YES. [2023-11-28 20:36:30,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12246 conditions, 2357 events. 1283/2357 cut-off events. For 11816/11823 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13453 event pairs, 340 based on Foata normal form. 18/2375 useless extension candidates. Maximal degree in co-relation 12192. Up to 1675 conditions per place. [2023-11-28 20:36:30,295 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 231 selfloop transitions, 29 changer transitions 6/273 dead transitions. [2023-11-28 20:36:30,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 273 transitions, 3226 flow [2023-11-28 20:36:30,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:36:30,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-28 20:36:30,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2023-11-28 20:36:30,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7287234042553191 [2023-11-28 20:36:30,296 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 137 transitions. [2023-11-28 20:36:30,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 137 transitions. [2023-11-28 20:36:30,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:36:30,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 137 transitions. [2023-11-28 20:36:30,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:30,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:30,297 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:30,297 INFO L175 Difference]: Start difference. First operand has 151 places, 260 transitions, 2601 flow. Second operand 4 states and 137 transitions. [2023-11-28 20:36:30,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 273 transitions, 3226 flow [2023-11-28 20:36:30,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 273 transitions, 3208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-28 20:36:30,396 INFO L231 Difference]: Finished difference. Result has 155 places, 260 transitions, 2684 flow [2023-11-28 20:36:30,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2583, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2684, PETRI_PLACES=155, PETRI_TRANSITIONS=260} [2023-11-28 20:36:30,397 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 107 predicate places. [2023-11-28 20:36:30,398 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 260 transitions, 2684 flow [2023-11-28 20:36:30,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:30,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:36:30,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:30,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2023-11-28 20:36:30,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:36:30,601 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:36:30,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:30,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1281361746, now seen corresponding path program 1 times [2023-11-28 20:36:30,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:36:30,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314996156] [2023-11-28 20:36:30,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:36:30,602 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 [2023-11-28 20:36:30,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:36:30,603 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:36:30,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-11-28 20:36:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:36:30,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 20:36:30,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 20:36:30,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:36:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 20:36:30,921 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:36:30,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314996156] [2023-11-28 20:36:30,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314996156] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:36:30,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:36:30,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-28 20:36:30,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061096332] [2023-11-28 20:36:30,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:36:30,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 20:36:30,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:36:30,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 20:36:30,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:36:30,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 47 [2023-11-28 20:36:30,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 260 transitions, 2684 flow. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 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) [2023-11-28 20:36:30,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:36:30,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 47 [2023-11-28 20:36:30,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:36:32,305 INFO L124 PetriNetUnfolderBase]: 2153/3939 cut-off events. [2023-11-28 20:36:32,305 INFO L125 PetriNetUnfolderBase]: For 22473/22473 co-relation queries the response was YES. [2023-11-28 20:36:32,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20667 conditions, 3939 events. 2153/3939 cut-off events. For 22473/22473 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 24084 event pairs, 227 based on Foata normal form. 210/4149 useless extension candidates. Maximal degree in co-relation 20611. Up to 1161 conditions per place. [2023-11-28 20:36:32,337 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 374 selfloop transitions, 143 changer transitions 0/524 dead transitions. [2023-11-28 20:36:32,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 524 transitions, 6291 flow [2023-11-28 20:36:32,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 20:36:32,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-28 20:36:32,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 282 transitions. [2023-11-28 20:36:32,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.75 [2023-11-28 20:36:32,339 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 282 transitions. [2023-11-28 20:36:32,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 282 transitions. [2023-11-28 20:36:32,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:36:32,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 282 transitions. [2023-11-28 20:36:32,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 35.25) internal successors, (282), 8 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:32,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 47.0) internal successors, (423), 9 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:32,341 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 47.0) internal successors, (423), 9 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:36:32,341 INFO L175 Difference]: Start difference. First operand has 155 places, 260 transitions, 2684 flow. Second operand 8 states and 282 transitions. [2023-11-28 20:36:32,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 524 transitions, 6291 flow [2023-11-28 20:36:32,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 524 transitions, 6116 flow, removed 19 selfloop flow, removed 6 redundant places. [2023-11-28 20:36:32,434 INFO L231 Difference]: Finished difference. Result has 160 places, 330 transitions, 3833 flow [2023-11-28 20:36:32,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2517, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3833, PETRI_PLACES=160, PETRI_TRANSITIONS=330} [2023-11-28 20:36:32,435 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 112 predicate places. [2023-11-28 20:36:32,435 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 330 transitions, 3833 flow [2023-11-28 20:36:32,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 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) [2023-11-28 20:36:32,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:36:32,436 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:36:32,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2023-11-28 20:36:32,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:36:32,636 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:36:32,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:36:32,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1055858070, now seen corresponding path program 2 times [2023-11-28 20:36:32,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:36:32,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [120190305] [2023-11-28 20:36:32,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:36:32,637 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 [2023-11-28 20:36:32,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:36:32,638 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:36:32,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-11-28 20:36:32,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:36:32,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:36:32,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 20:36:32,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:36:33,604 INFO L349 Elim1Store]: treesize reduction 162, result has 19.4 percent of original size [2023-11-28 20:36:33,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 313 treesize of output 112 [2023-11-28 20:36:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:36:35,305 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:36:47,398 INFO L349 Elim1Store]: treesize reduction 1042, result has 17.1 percent of original size [2023-11-28 20:36:47,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 24 new quantified variables, introduced 120 case distinctions, treesize of input 413 treesize of output 348 [2023-11-28 20:38:30,812 WARN L293 SmtUtils]: Spent 14.97s on a formula simplification. DAG size of input: 5509 DAG size of output: 5512 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:41:08,346 WARN L293 SmtUtils]: Spent 32.79s on a formula simplification. DAG size of input: 9909 DAG size of output: 10048 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:43:35,990 WARN L293 SmtUtils]: Spent 9.66s on a formula simplification that was a NOOP. DAG size: 10386 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:44:38,460 WARN L293 SmtUtils]: Spent 10.23s on a formula simplification that was a NOOP. DAG size: 8409 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:46:49,798 WARN L293 SmtUtils]: Spent 10.81s on a formula simplification. DAG size of input: 7876 DAG size of output: 7813 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-11-28 20:47:08,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:47:08,896 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 20:47:08,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [120190305] [2023-11-28 20:47:08,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [120190305] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:47:08,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 20:47:08,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-28 20:47:08,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844165526] [2023-11-28 20:47:08,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 20:47:08,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-28 20:47:08,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 20:47:08,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-28 20:47:08,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=98, Unknown=1, NotChecked=0, Total=132 [2023-11-28 20:47:12,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-28 20:47:16,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-28 20:47:20,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-28 20:47:24,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-28 20:47:29,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-28 20:47:33,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-28 20:47:33,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 47 [2023-11-28 20:47:33,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 330 transitions, 3833 flow. Second operand has 12 states, 12 states have (on average 22.666666666666668) internal successors, (272), 12 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:33,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 20:47:33,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 47 [2023-11-28 20:47:33,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 20:47:37,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:47:41,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-28 20:47:45,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-28 20:47:47,397 INFO L124 PetriNetUnfolderBase]: 2783/5122 cut-off events. [2023-11-28 20:47:47,397 INFO L125 PetriNetUnfolderBase]: For 27061/27061 co-relation queries the response was YES. [2023-11-28 20:47:47,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28258 conditions, 5122 events. 2783/5122 cut-off events. For 27061/27061 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 32185 event pairs, 254 based on Foata normal form. 6/5125 useless extension candidates. Maximal degree in co-relation 28202. Up to 2566 conditions per place. [2023-11-28 20:47:47,456 INFO L140 encePairwiseOnDemand]: 42/47 looper letters, 452 selfloop transitions, 133 changer transitions 1/593 dead transitions. [2023-11-28 20:47:47,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 593 transitions, 7952 flow [2023-11-28 20:47:47,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-28 20:47:47,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-28 20:47:47,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 257 transitions. [2023-11-28 20:47:47,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.607565011820331 [2023-11-28 20:47:47,457 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 257 transitions. [2023-11-28 20:47:47,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 257 transitions. [2023-11-28 20:47:47,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 20:47:47,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 257 transitions. [2023-11-28 20:47:47,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 28.555555555555557) internal successors, (257), 9 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:47,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 47.0) internal successors, (470), 10 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:47,459 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 47.0) internal successors, (470), 10 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:47,459 INFO L175 Difference]: Start difference. First operand has 160 places, 330 transitions, 3833 flow. Second operand 9 states and 257 transitions. [2023-11-28 20:47:47,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 593 transitions, 7952 flow [2023-11-28 20:47:47,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 593 transitions, 7670 flow, removed 114 selfloop flow, removed 2 redundant places. [2023-11-28 20:47:47,574 INFO L231 Difference]: Finished difference. Result has 169 places, 426 transitions, 5065 flow [2023-11-28 20:47:47,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3675, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5065, PETRI_PLACES=169, PETRI_TRANSITIONS=426} [2023-11-28 20:47:47,575 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 121 predicate places. [2023-11-28 20:47:47,575 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 426 transitions, 5065 flow [2023-11-28 20:47:47,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 22.666666666666668) internal successors, (272), 12 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:47:47,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 20:47:47,576 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:47:47,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-11-28 20:47:47,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 [2023-11-28 20:47:47,776 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-28 20:47:47,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:47:47,776 INFO L85 PathProgramCache]: Analyzing trace with hash -2054252464, now seen corresponding path program 3 times [2023-11-28 20:47:47,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 20:47:47,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660369477] [2023-11-28 20:47:47,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 20:47:47,777 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 [2023-11-28 20:47:47,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 20:47:47,778 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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) [2023-11-28 20:47:47,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ee17f1d-eb2b-489d-935f-edd33e191be1/bin/uautomizer-verify-BQ2R08f2Ya/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 (27)] Waiting until timeout for monitored process [2023-11-28 20:47:47,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-28 20:47:47,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:47:47,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-28 20:47:47,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:47:48,406 INFO L349 Elim1Store]: treesize reduction 164, result has 7.3 percent of original size [2023-11-28 20:47:48,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 178 treesize of output 90 [2023-11-28 20:47:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:47:48,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:48:00,305 INFO L349 Elim1Store]: treesize reduction 1042, result has 17.1 percent of original size [2023-11-28 20:48:00,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 24 new quantified variables, introduced 120 case distinctions, treesize of input 504 treesize of output 368