./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-sorted.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_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:25:38,790 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:25:38,854 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 05:25:38,860 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:25:38,860 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:25:38,885 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:25:38,886 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:25:38,886 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:25:38,887 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:25:38,887 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:25:38,888 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:25:38,889 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:25:38,889 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:25:38,890 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:25:38,890 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:25:38,891 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:25:38,892 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:25:38,892 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:25:38,893 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:25:38,893 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:25:38,894 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 05:25:38,894 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 05:25:38,895 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 05:25:38,895 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:25:38,896 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 05:25:38,896 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 05:25:38,904 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:25:38,904 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:25:38,905 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:25:38,905 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:25:38,906 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:25:38,906 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:25:38,907 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:25:38,907 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:25:38,907 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:25:38,908 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:25:38,908 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:25:38,908 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:25:38,908 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:25:38,909 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:25:38,909 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:25:38,911 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_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 [2023-11-29 05:25:39,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:25:39,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:25:39,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:25:39,144 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:25:39,145 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:25:39,146 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2023-11-29 05:25:41,888 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:25:42,055 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:25:42,055 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2023-11-29 05:25:42,062 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/data/3924c8d0f/41232627e96945139625ed059b70e90c/FLAG41238db80 [2023-11-29 05:25:42,073 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/data/3924c8d0f/41232627e96945139625ed059b70e90c [2023-11-29 05:25:42,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:25:42,076 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:25:42,077 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:25:42,077 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:25:42,081 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:25:42,082 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:25:42" (1/1) ... [2023-11-29 05:25:42,082 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@553c2190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:42, skipping insertion in model container [2023-11-29 05:25:42,083 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:25:42" (1/1) ... [2023-11-29 05:25:42,108 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:25:42,271 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:25:42,283 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) [2023-11-29 05:25:42,284 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7aaec63d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:42, skipping insertion in model container [2023-11-29 05:25:42,284 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:25:42,284 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-29 05:25:42,286 INFO L158 Benchmark]: Toolchain (without parser) took 209.49ms. Allocated memory is still 159.4MB. Free memory was 114.0MB in the beginning and 103.8MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 05:25:42,287 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 159.4MB. Free memory is still 128.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 05:25:42,288 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.61ms. Allocated memory is still 159.4MB. Free memory was 113.4MB in the beginning and 103.8MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-29 05:25:42,289 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 159.4MB. Free memory is still 128.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 207.61ms. Allocated memory is still 159.4MB. Free memory was 113.4MB in the beginning and 103.8MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:25:44,052 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:25:44,133 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-29 05:25:44,138 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:25:44,139 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:25:44,166 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:25:44,167 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:25:44,167 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:25:44,168 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:25:44,168 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:25:44,169 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:25:44,170 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:25:44,170 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:25:44,171 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:25:44,171 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:25:44,172 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:25:44,173 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:25:44,173 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:25:44,173 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:25:44,174 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:25:44,174 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 05:25:44,175 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 05:25:44,175 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 05:25:44,176 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:25:44,176 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 05:25:44,177 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 05:25:44,177 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 05:25:44,177 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 05:25:44,178 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:25:44,178 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:25:44,178 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:25:44,179 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:25:44,179 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:25:44,179 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:25:44,180 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:25:44,180 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:25:44,180 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:25:44,180 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 05:25:44,180 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 05:25:44,181 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:25:44,181 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:25:44,181 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:25:44,181 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:25:44,181 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 05:25:44,182 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_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 [2023-11-29 05:25:44,483 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:25:44,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:25:44,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:25:44,510 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:25:44,510 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:25:44,511 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2023-11-29 05:25:47,352 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:25:47,535 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:25:47,536 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2023-11-29 05:25:47,561 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/data/9b7d809f2/b608f0f8313240a8ac9b9dd267522f48/FLAG8f0421f26 [2023-11-29 05:25:47,576 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/data/9b7d809f2/b608f0f8313240a8ac9b9dd267522f48 [2023-11-29 05:25:47,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:25:47,580 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:25:47,582 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:25:47,582 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:25:47,587 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:25:47,588 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:25:47" (1/1) ... [2023-11-29 05:25:47,589 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b4a0379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:47, skipping insertion in model container [2023-11-29 05:25:47,589 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:25:47" (1/1) ... [2023-11-29 05:25:47,615 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:25:47,810 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:25:47,825 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-29 05:25:47,829 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:25:47,850 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:25:47,855 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:25:47,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:25:47,901 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:25:47,901 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:47 WrapperNode [2023-11-29 05:25:47,901 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:25:47,903 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:25:47,903 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:25:47,903 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:25:47,910 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:47" (1/1) ... [2023-11-29 05:25:47,922 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:47" (1/1) ... [2023-11-29 05:25:47,951 INFO L138 Inliner]: procedures = 26, calls = 38, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 107 [2023-11-29 05:25:47,952 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:25:47,953 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:25:47,953 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:25:47,953 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:25:47,965 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:47" (1/1) ... [2023-11-29 05:25:47,965 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:47" (1/1) ... [2023-11-29 05:25:47,970 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:47" (1/1) ... [2023-11-29 05:25:47,990 INFO L175 MemorySlicer]: Split 15 memory accesses to 5 slices as follows [2, 7, 2, 2, 2]. 47 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2023-11-29 05:25:47,991 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:47" (1/1) ... [2023-11-29 05:25:47,991 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:47" (1/1) ... [2023-11-29 05:25:48,006 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:47" (1/1) ... [2023-11-29 05:25:48,011 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:47" (1/1) ... [2023-11-29 05:25:48,014 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:47" (1/1) ... [2023-11-29 05:25:48,016 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:47" (1/1) ... [2023-11-29 05:25:48,021 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:25:48,022 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:25:48,022 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:25:48,022 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:25:48,023 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:47" (1/1) ... [2023-11-29 05:25:48,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:25:48,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:25:48,053 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:25:48,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:25:48,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:25:48,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 05:25:48,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 05:25:48,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 05:25:48,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-29 05:25:48,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-29 05:25:48,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:25:48,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 05:25:48,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 05:25:48,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 05:25:48,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-29 05:25:48,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-29 05:25:48,095 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 05:25:48,095 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 05:25:48,095 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 05:25:48,096 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 05:25:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 05:25:48,096 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 05:25:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 05:25:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:25:48,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:25:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:25:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 05:25:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 05:25:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 05:25:48,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-29 05:25:48,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-29 05:25:48,099 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 05:25:48,235 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:25:48,238 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:25:48,746 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:25:48,971 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:25:48,971 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 05:25:48,971 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:25:48 BoogieIcfgContainer [2023-11-29 05:25:48,971 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:25:48,974 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:25:48,974 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:25:48,977 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:25:48,978 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:25:47" (1/3) ... [2023-11-29 05:25:48,978 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48653cc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:25:48, skipping insertion in model container [2023-11-29 05:25:48,978 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:25:47" (2/3) ... [2023-11-29 05:25:48,979 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48653cc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:25:48, skipping insertion in model container [2023-11-29 05:25:48,979 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:25:48" (3/3) ... [2023-11-29 05:25:48,980 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2023-11-29 05:25:49,000 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:25:49,000 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-11-29 05:25:49,000 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 05:25:49,075 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 05:25:49,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 79 transitions, 179 flow [2023-11-29 05:25:49,150 INFO L124 PetriNetUnfolderBase]: 7/76 cut-off events. [2023-11-29 05:25:49,150 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 05:25:49,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 76 events. 7/76 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 190 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-11-29 05:25:49,156 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 79 transitions, 179 flow [2023-11-29 05:25:49,161 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 75 transitions, 168 flow [2023-11-29 05:25:49,172 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:25:49,178 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@57455101, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:25:49,179 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2023-11-29 05:25:49,196 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 05:25:49,196 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-29 05:25:49,196 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 05:25:49,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:25:49,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 05:25:49,197 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:25:49,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:49,206 INFO L85 PathProgramCache]: Analyzing trace with hash 493219, now seen corresponding path program 1 times [2023-11-29 05:25:49,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:25:49,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100918805] [2023-11-29 05:25:49,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:49,219 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 [2023-11-29 05:25:49,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:25:49,223 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:25:49,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:25:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:49,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:25:49,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:25:49,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 05:25:49,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:49,429 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 [2023-11-29 05:25:49,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:49,443 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 [2023-11-29 05:25:49,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:49,458 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 [2023-11-29 05:25:49,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:49,469 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 [2023-11-29 05:25:49,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:49,475 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 [2023-11-29 05:25:49,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:49,489 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 [2023-11-29 05:25:49,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:49,495 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 [2023-11-29 05:25:49,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:49,505 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 [2023-11-29 05:25:49,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:49,512 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 [2023-11-29 05:25:49,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:49,524 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 [2023-11-29 05:25:49,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:49,540 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 [2023-11-29 05:25:49,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:49,552 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 [2023-11-29 05:25:49,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:49,558 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 [2023-11-29 05:25:49,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:49,570 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 [2023-11-29 05:25:49,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:49,586 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 [2023-11-29 05:25:49,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:49,596 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 [2023-11-29 05:25:49,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:49,601 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 [2023-11-29 05:25:49,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:49,620 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 [2023-11-29 05:25:49,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:49,634 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 [2023-11-29 05:25:49,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:49,664 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 [2023-11-29 05:25:49,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:49,674 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 [2023-11-29 05:25:49,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:49,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 05:25:49,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:49,723 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 [2023-11-29 05:25:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:49,733 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:25:49,734 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:25:49,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100918805] [2023-11-29 05:25:49,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100918805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:25:49,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:25:49,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:25:49,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508163803] [2023-11-29 05:25:49,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:25:49,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:25:49,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:25:49,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:25:49,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:25:49,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 79 [2023-11-29 05:25:49,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 75 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:49,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:25:49,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 79 [2023-11-29 05:25:49,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:25:50,306 INFO L124 PetriNetUnfolderBase]: 777/1691 cut-off events. [2023-11-29 05:25:50,306 INFO L125 PetriNetUnfolderBase]: For 103/106 co-relation queries the response was YES. [2023-11-29 05:25:50,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2820 conditions, 1691 events. 777/1691 cut-off events. For 103/106 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11329 event pairs, 457 based on Foata normal form. 1/1129 useless extension candidates. Maximal degree in co-relation 2699. Up to 1047 conditions per place. [2023-11-29 05:25:50,329 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 27 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-11-29 05:25:50,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 72 transitions, 220 flow [2023-11-29 05:25:50,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:25:50,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:25:50,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 172 transitions. [2023-11-29 05:25:50,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7257383966244726 [2023-11-29 05:25:50,343 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 172 transitions. [2023-11-29 05:25:50,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 172 transitions. [2023-11-29 05:25:50,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:25:50,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 172 transitions. [2023-11-29 05:25:50,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:50,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:50,355 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:50,356 INFO L175 Difference]: Start difference. First operand has 78 places, 75 transitions, 168 flow. Second operand 3 states and 172 transitions. [2023-11-29 05:25:50,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 72 transitions, 220 flow [2023-11-29 05:25:50,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 72 transitions, 208 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 05:25:50,365 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 154 flow [2023-11-29 05:25:50,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2023-11-29 05:25:50,370 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -7 predicate places. [2023-11-29 05:25:50,371 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 154 flow [2023-11-29 05:25:50,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:50,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:25:50,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 05:25:50,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:25:50,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:25:50,572 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:25:50,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:50,573 INFO L85 PathProgramCache]: Analyzing trace with hash 493220, now seen corresponding path program 1 times [2023-11-29 05:25:50,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:25:50,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224368033] [2023-11-29 05:25:50,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:50,574 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 [2023-11-29 05:25:50,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:25:50,575 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:25:50,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:25:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:50,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:25:50,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:25:50,695 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 [2023-11-29 05:25:50,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:50,712 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 [2023-11-29 05:25:50,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:50,724 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 [2023-11-29 05:25:50,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:50,731 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 [2023-11-29 05:25:50,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:50,744 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 [2023-11-29 05:25:50,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:50,751 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 [2023-11-29 05:25:50,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:50,764 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 [2023-11-29 05:25:50,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:50,774 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 [2023-11-29 05:25:50,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:50,795 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 [2023-11-29 05:25:50,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:50,807 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 [2023-11-29 05:25:50,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:50,819 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 [2023-11-29 05:25:50,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:50,826 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 [2023-11-29 05:25:50,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:50,841 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 [2023-11-29 05:25:50,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:50,848 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 8 treesize of output 1 [2023-11-29 05:25:50,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:50,858 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 [2023-11-29 05:25:50,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:50,868 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 [2023-11-29 05:25:50,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:50,890 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 [2023-11-29 05:25:50,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:50,904 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 [2023-11-29 05:25:50,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:50,928 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 [2023-11-29 05:25:50,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:50,940 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 [2023-11-29 05:25:50,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:50,959 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 [2023-11-29 05:25:50,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:50,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:25:51,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:51,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:25:51,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:51,021 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 [2023-11-29 05:25:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:51,111 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:25:51,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:25:51,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224368033] [2023-11-29 05:25:51,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1224368033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:25:51,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:25:51,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:25:51,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666319747] [2023-11-29 05:25:51,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:25:51,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:25:51,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:25:51,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:25:51,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:25:51,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 79 [2023-11-29 05:25:51,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:51,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:25:51,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 79 [2023-11-29 05:25:51,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:25:51,850 INFO L124 PetriNetUnfolderBase]: 778/1694 cut-off events. [2023-11-29 05:25:51,851 INFO L125 PetriNetUnfolderBase]: For 25/28 co-relation queries the response was YES. [2023-11-29 05:25:51,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2778 conditions, 1694 events. 778/1694 cut-off events. For 25/28 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11323 event pairs, 457 based on Foata normal form. 0/1131 useless extension candidates. Maximal degree in co-relation 2756. Up to 1052 conditions per place. [2023-11-29 05:25:51,869 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 29 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-11-29 05:25:51,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 75 transitions, 228 flow [2023-11-29 05:25:51,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:25:51,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:25:51,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 222 transitions. [2023-11-29 05:25:51,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7025316455696202 [2023-11-29 05:25:51,872 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 222 transitions. [2023-11-29 05:25:51,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 222 transitions. [2023-11-29 05:25:51,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:25:51,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 222 transitions. [2023-11-29 05:25:51,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:51,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:51,877 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:51,877 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 154 flow. Second operand 4 states and 222 transitions. [2023-11-29 05:25:51,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 75 transitions, 228 flow [2023-11-29 05:25:51,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 75 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:25:51,880 INFO L231 Difference]: Finished difference. Result has 74 places, 75 transitions, 177 flow [2023-11-29 05:25:51,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=74, PETRI_TRANSITIONS=75} [2023-11-29 05:25:51,881 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -4 predicate places. [2023-11-29 05:25:51,882 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 75 transitions, 177 flow [2023-11-29 05:25:51,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.75) internal successors, (191), 4 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:51,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:25:51,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 05:25:51,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:25:52,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:25:52,083 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:25:52,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:52,083 INFO L85 PathProgramCache]: Analyzing trace with hash 493240, now seen corresponding path program 1 times [2023-11-29 05:25:52,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:25:52,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727342484] [2023-11-29 05:25:52,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:52,084 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 [2023-11-29 05:25:52,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:25:52,085 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:25:52,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:25:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:52,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:25:52,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:25:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:52,165 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:25:52,165 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:25:52,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727342484] [2023-11-29 05:25:52,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727342484] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:25:52,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:25:52,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:25:52,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403434669] [2023-11-29 05:25:52,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:25:52,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:25:52,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:25:52,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:25:52,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:25:52,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 79 [2023-11-29 05:25:52,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:52,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:25:52,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 79 [2023-11-29 05:25:52,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:25:52,466 INFO L124 PetriNetUnfolderBase]: 777/1693 cut-off events. [2023-11-29 05:25:52,466 INFO L125 PetriNetUnfolderBase]: For 25/28 co-relation queries the response was YES. [2023-11-29 05:25:52,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2783 conditions, 1693 events. 777/1693 cut-off events. For 25/28 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11332 event pairs, 457 based on Foata normal form. 1/1131 useless extension candidates. Maximal degree in co-relation 2767. Up to 1050 conditions per place. [2023-11-29 05:25:52,484 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 29 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-11-29 05:25:52,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 74 transitions, 234 flow [2023-11-29 05:25:52,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:25:52,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:25:52,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 176 transitions. [2023-11-29 05:25:52,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7426160337552743 [2023-11-29 05:25:52,486 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 176 transitions. [2023-11-29 05:25:52,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 176 transitions. [2023-11-29 05:25:52,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:25:52,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 176 transitions. [2023-11-29 05:25:52,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:52,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:52,489 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:52,489 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 177 flow. Second operand 3 states and 176 transitions. [2023-11-29 05:25:52,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 74 transitions, 234 flow [2023-11-29 05:25:52,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 74 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:25:52,505 INFO L231 Difference]: Finished difference. Result has 75 places, 74 transitions, 174 flow [2023-11-29 05:25:52,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=75, PETRI_TRANSITIONS=74} [2023-11-29 05:25:52,506 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2023-11-29 05:25:52,506 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 74 transitions, 174 flow [2023-11-29 05:25:52,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:52,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:25:52,507 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-29 05:25:52,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:25:52,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:25:52,708 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:25:52,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:52,708 INFO L85 PathProgramCache]: Analyzing trace with hash 474000023, now seen corresponding path program 1 times [2023-11-29 05:25:52,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:25:52,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261894004] [2023-11-29 05:25:52,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:52,709 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 [2023-11-29 05:25:52,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:25:52,710 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:25:52,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:25:52,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:52,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:25:52,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:25:52,790 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 [2023-11-29 05:25:52,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:52,803 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 [2023-11-29 05:25:52,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:52,816 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 [2023-11-29 05:25:52,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:52,834 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 [2023-11-29 05:25:52,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:52,842 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 [2023-11-29 05:25:52,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:52,852 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 [2023-11-29 05:25:52,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:52,868 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 [2023-11-29 05:25:52,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:52,884 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 [2023-11-29 05:25:52,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:52,893 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 [2023-11-29 05:25:52,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:52,903 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 [2023-11-29 05:25:52,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:52,911 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 [2023-11-29 05:25:52,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:52,921 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 [2023-11-29 05:25:52,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:52,948 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 [2023-11-29 05:25:52,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:52,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:25:52,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:52,996 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 [2023-11-29 05:25:53,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:53,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:25:53,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:53,026 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 [2023-11-29 05:25:53,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:53,036 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 [2023-11-29 05:25:53,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:53,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:25:53,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:53,055 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 [2023-11-29 05:25:53,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:53,076 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 [2023-11-29 05:25:53,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:53,091 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 [2023-11-29 05:25:53,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:53,099 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 [2023-11-29 05:25:53,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:53,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:25:53,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:53,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:25:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:53,617 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:25:53,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261894004] [2023-11-29 05:25:53,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261894004] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:25:53,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:25:53,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 05:25:53,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080380056] [2023-11-29 05:25:53,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:25:53,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:25:53,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:25:53,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:25:53,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:25:55,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 79 [2023-11-29 05:25:55,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 74 transitions, 174 flow. Second operand has 10 states, 10 states have (on average 48.0) internal successors, (480), 10 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:55,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:25:55,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 79 [2023-11-29 05:25:55,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:25:56,284 INFO L124 PetriNetUnfolderBase]: 780/1702 cut-off events. [2023-11-29 05:25:56,284 INFO L125 PetriNetUnfolderBase]: For 25/28 co-relation queries the response was YES. [2023-11-29 05:25:56,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2812 conditions, 1702 events. 780/1702 cut-off events. For 25/28 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 11368 event pairs, 457 based on Foata normal form. 0/1135 useless extension candidates. Maximal degree in co-relation 2795. Up to 1054 conditions per place. [2023-11-29 05:25:56,301 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 29 selfloop transitions, 12 changer transitions 0/83 dead transitions. [2023-11-29 05:25:56,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 292 flow [2023-11-29 05:25:56,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:25:56,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 05:25:56,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 514 transitions. [2023-11-29 05:25:56,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6506329113924051 [2023-11-29 05:25:56,305 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 514 transitions. [2023-11-29 05:25:56,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 514 transitions. [2023-11-29 05:25:56,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:25:56,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 514 transitions. [2023-11-29 05:25:56,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 51.4) internal successors, (514), 10 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:56,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 79.0) internal successors, (869), 11 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:56,312 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 79.0) internal successors, (869), 11 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:56,312 INFO L175 Difference]: Start difference. First operand has 75 places, 74 transitions, 174 flow. Second operand 10 states and 514 transitions. [2023-11-29 05:25:56,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 292 flow [2023-11-29 05:25:56,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 83 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:25:56,316 INFO L231 Difference]: Finished difference. Result has 85 places, 83 transitions, 248 flow [2023-11-29 05:25:56,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=248, PETRI_PLACES=85, PETRI_TRANSITIONS=83} [2023-11-29 05:25:56,317 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 7 predicate places. [2023-11-29 05:25:56,317 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 83 transitions, 248 flow [2023-11-29 05:25:56,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 48.0) internal successors, (480), 10 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:56,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:25:56,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 05:25:56,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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)] Ended with exit code 0 [2023-11-29 05:25:56,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:25:56,520 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:25:56,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:56,520 INFO L85 PathProgramCache]: Analyzing trace with hash 474000043, now seen corresponding path program 1 times [2023-11-29 05:25:56,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:25:56,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889370115] [2023-11-29 05:25:56,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:56,521 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 [2023-11-29 05:25:56,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:25:56,522 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:25:56,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:25:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:56,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:25:56,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:25:56,624 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:25:56,624 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 [2023-11-29 05:25:56,652 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-29 05:25:56,652 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 [2023-11-29 05:25:56,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:56,684 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-29 05:25:56,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2023-11-29 05:25:56,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:56,727 INFO L349 Elim1Store]: treesize reduction 60, result has 10.4 percent of original size [2023-11-29 05:25:56,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2023-11-29 05:25:56,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:56,763 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-29 05:25:56,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2023-11-29 05:25:56,785 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:25:56,785 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 [2023-11-29 05:25:56,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:25:56,980 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:25:56,980 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:25:56,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889370115] [2023-11-29 05:25:56,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889370115] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:25:56,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:25:56,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:25:56,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401424663] [2023-11-29 05:25:56,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:25:56,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:25:56,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:25:56,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:25:56,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:25:57,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 79 [2023-11-29 05:25:57,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 83 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 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) [2023-11-29 05:25:57,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:25:57,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 79 [2023-11-29 05:25:57,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:25:57,481 INFO L124 PetriNetUnfolderBase]: 1151/2337 cut-off events. [2023-11-29 05:25:57,482 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-11-29 05:25:57,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3945 conditions, 2337 events. 1151/2337 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 15698 event pairs, 697 based on Foata normal form. 0/1643 useless extension candidates. Maximal degree in co-relation 3911. Up to 1537 conditions per place. [2023-11-29 05:25:57,502 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 41 selfloop transitions, 1 changer transitions 0/81 dead transitions. [2023-11-29 05:25:57,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 81 transitions, 328 flow [2023-11-29 05:25:57,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:25:57,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:25:57,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2023-11-29 05:25:57,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6962025316455697 [2023-11-29 05:25:57,503 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 165 transitions. [2023-11-29 05:25:57,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 165 transitions. [2023-11-29 05:25:57,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:25:57,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 165 transitions. [2023-11-29 05:25:57,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:57,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:57,506 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:25:57,506 INFO L175 Difference]: Start difference. First operand has 85 places, 83 transitions, 248 flow. Second operand 3 states and 165 transitions. [2023-11-29 05:25:57,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 81 transitions, 328 flow [2023-11-29 05:25:57,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 81 transitions, 300 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-29 05:25:57,510 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 218 flow [2023-11-29 05:25:57,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2023-11-29 05:25:57,511 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 4 predicate places. [2023-11-29 05:25:57,511 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 218 flow [2023-11-29 05:25:57,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 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) [2023-11-29 05:25:57,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:25:57,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 05:25:57,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:25:57,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:25:57,714 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:25:57,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:25:57,714 INFO L85 PathProgramCache]: Analyzing trace with hash 474000044, now seen corresponding path program 1 times [2023-11-29 05:25:57,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:25:57,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334146646] [2023-11-29 05:25:57,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:25:57,715 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 [2023-11-29 05:25:57,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:25:57,716 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:25:57,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:25:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:25:57,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:25:57,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:25:57,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:57,863 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2023-11-29 05:25:57,864 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 2 case distinctions, treesize of input 14 treesize of output 26 [2023-11-29 05:25:57,873 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 10 treesize of output 8 [2023-11-29 05:25:57,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:57,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:57,968 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 05:25:57,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2023-11-29 05:25:57,996 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-11-29 05:25:57,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 89 [2023-11-29 05:25:58,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:58,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:58,099 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2023-11-29 05:25:58,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2023-11-29 05:25:58,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:25:58,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-29 05:25:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:59,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:25:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:25:59,674 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:25:59,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334146646] [2023-11-29 05:25:59,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334146646] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:25:59,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:25:59,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 05:25:59,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56764111] [2023-11-29 05:25:59,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:25:59,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:25:59,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:25:59,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:25:59,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:26:01,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 79 [2023-11-29 05:26:01,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 218 flow. Second operand has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:01,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:01,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 79 [2023-11-29 05:26:01,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:03,702 INFO L124 PetriNetUnfolderBase]: 1151/2316 cut-off events. [2023-11-29 05:26:03,702 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-29 05:26:03,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3911 conditions, 2316 events. 1151/2316 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 15424 event pairs, 697 based on Foata normal form. 0/1622 useless extension candidates. Maximal degree in co-relation 3899. Up to 1533 conditions per place. [2023-11-29 05:26:03,723 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 37 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2023-11-29 05:26:03,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 79 transitions, 298 flow [2023-11-29 05:26:03,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:26:03,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:26:03,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 302 transitions. [2023-11-29 05:26:03,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371308016877637 [2023-11-29 05:26:03,726 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 302 transitions. [2023-11-29 05:26:03,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 302 transitions. [2023-11-29 05:26:03,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:03,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 302 transitions. [2023-11-29 05:26:03,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 50.333333333333336) internal successors, (302), 6 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:03,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:03,729 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:03,729 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 218 flow. Second operand 6 states and 302 transitions. [2023-11-29 05:26:03,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 79 transitions, 298 flow [2023-11-29 05:26:03,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 79 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:26:03,732 INFO L231 Difference]: Finished difference. Result has 84 places, 79 transitions, 223 flow [2023-11-29 05:26:03,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=84, PETRI_TRANSITIONS=79} [2023-11-29 05:26:03,733 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 6 predicate places. [2023-11-29 05:26:03,733 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 79 transitions, 223 flow [2023-11-29 05:26:03,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:03,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:03,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:03,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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)] Ended with exit code 0 [2023-11-29 05:26:03,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:03,937 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:26:03,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:03,937 INFO L85 PathProgramCache]: Analyzing trace with hash -916682411, now seen corresponding path program 1 times [2023-11-29 05:26:03,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:26:03,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144978595] [2023-11-29 05:26:03,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:03,938 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 [2023-11-29 05:26:03,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:26:03,939 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:26:03,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:04,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:26:04,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:04,066 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:26:04,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2023-11-29 05:26:04,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:04,096 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-29 05:26:04,096 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 [2023-11-29 05:26:04,114 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:26:04,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2023-11-29 05:26:04,138 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-29 05:26:04,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 22 [2023-11-29 05:26:04,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:04,186 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-29 05:26:04,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-29 05:26:04,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:04,213 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:26:04,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-29 05:26:04,249 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-29 05:26:04,249 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 [2023-11-29 05:26:04,265 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:26:04,265 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 [2023-11-29 05:26:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:26:04,580 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:26:04,581 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:26:04,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144978595] [2023-11-29 05:26:04,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144978595] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:04,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:04,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:26:04,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608720738] [2023-11-29 05:26:04,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:04,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:26:04,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:26:04,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:26:04,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:26:04,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 79 [2023-11-29 05:26:04,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 79 transitions, 223 flow. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:04,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:04,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 79 [2023-11-29 05:26:04,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:04,979 INFO L124 PetriNetUnfolderBase]: 838/1763 cut-off events. [2023-11-29 05:26:04,980 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-29 05:26:04,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2971 conditions, 1763 events. 838/1763 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11431 event pairs, 494 based on Foata normal form. 0/1227 useless extension candidates. Maximal degree in co-relation 2958. Up to 1145 conditions per place. [2023-11-29 05:26:04,994 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 41 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2023-11-29 05:26:04,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 77 transitions, 303 flow [2023-11-29 05:26:04,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:26:04,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:26:04,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2023-11-29 05:26:04,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6962025316455697 [2023-11-29 05:26:04,996 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 165 transitions. [2023-11-29 05:26:04,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 165 transitions. [2023-11-29 05:26:04,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:04,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 165 transitions. [2023-11-29 05:26:04,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:04,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:04,998 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:04,998 INFO L175 Difference]: Start difference. First operand has 84 places, 79 transitions, 223 flow. Second operand 3 states and 165 transitions. [2023-11-29 05:26:04,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 77 transitions, 303 flow [2023-11-29 05:26:05,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 77 transitions, 295 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:26:05,001 INFO L231 Difference]: Finished difference. Result has 80 places, 77 transitions, 213 flow [2023-11-29 05:26:05,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=80, PETRI_TRANSITIONS=77} [2023-11-29 05:26:05,002 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 2 predicate places. [2023-11-29 05:26:05,002 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 77 transitions, 213 flow [2023-11-29 05:26:05,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:05,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:05,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:05,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:05,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:05,203 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:26:05,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:05,204 INFO L85 PathProgramCache]: Analyzing trace with hash -916682410, now seen corresponding path program 1 times [2023-11-29 05:26:05,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:26:05,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575583634] [2023-11-29 05:26:05,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:05,204 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:26:05,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:26:05,205 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:26:05,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:05,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:26:05,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:05,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:05,307 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 13 [2023-11-29 05:26:05,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:05,349 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 05:26:05,349 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 [2023-11-29 05:26:05,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:05,358 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 [2023-11-29 05:26:05,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:05,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:05,405 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 05:26:05,405 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 [2023-11-29 05:26:05,413 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 [2023-11-29 05:26:05,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:05,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:05,435 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 [2023-11-29 05:26:05,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:05,444 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 [2023-11-29 05:26:05,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:05,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:05,469 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 13 [2023-11-29 05:26:05,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:05,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:05,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 05:26:05,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:05,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:05,537 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 05:26:05,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2023-11-29 05:26:05,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:05,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-29 05:26:05,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:05,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:05,591 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 05:26:05,591 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 [2023-11-29 05:26:05,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:05,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:05,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2023-11-29 05:26:05,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:06,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:06,432 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:26:06,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575583634] [2023-11-29 05:26:06,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575583634] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:06,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:26:06,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 05:26:06,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375581241] [2023-11-29 05:26:06,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:06,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:26:06,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:26:06,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:26:06,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:26:07,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 79 [2023-11-29 05:26:07,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 77 transitions, 213 flow. Second operand has 10 states, 10 states have (on average 45.4) internal successors, (454), 10 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:07,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:07,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 79 [2023-11-29 05:26:07,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:08,802 INFO L124 PetriNetUnfolderBase]: 838/1754 cut-off events. [2023-11-29 05:26:08,802 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-29 05:26:08,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2960 conditions, 1754 events. 838/1754 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 11318 event pairs, 494 based on Foata normal form. 0/1218 useless extension candidates. Maximal degree in co-relation 2947. Up to 1141 conditions per place. [2023-11-29 05:26:08,810 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 37 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2023-11-29 05:26:08,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 75 transitions, 293 flow [2023-11-29 05:26:08,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:26:08,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:26:08,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 302 transitions. [2023-11-29 05:26:08,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371308016877637 [2023-11-29 05:26:08,812 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 302 transitions. [2023-11-29 05:26:08,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 302 transitions. [2023-11-29 05:26:08,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:08,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 302 transitions. [2023-11-29 05:26:08,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 50.333333333333336) internal successors, (302), 6 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:08,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:08,816 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:08,816 INFO L175 Difference]: Start difference. First operand has 80 places, 77 transitions, 213 flow. Second operand 6 states and 302 transitions. [2023-11-29 05:26:08,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 75 transitions, 293 flow [2023-11-29 05:26:08,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 75 transitions, 292 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:26:08,818 INFO L231 Difference]: Finished difference. Result has 82 places, 75 transitions, 218 flow [2023-11-29 05:26:08,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=218, PETRI_PLACES=82, PETRI_TRANSITIONS=75} [2023-11-29 05:26:08,819 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 4 predicate places. [2023-11-29 05:26:08,819 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 75 transitions, 218 flow [2023-11-29 05:26:08,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 45.4) internal successors, (454), 10 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:08,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:08,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:08,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:09,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:09,021 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:26:09,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:09,021 INFO L85 PathProgramCache]: Analyzing trace with hash -463147816, now seen corresponding path program 1 times [2023-11-29 05:26:09,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:26:09,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514271283] [2023-11-29 05:26:09,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:09,021 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 [2023-11-29 05:26:09,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:26:09,022 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:26:09,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:09,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:26:09,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:09,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:09,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:09,364 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 25 treesize of output 21 [2023-11-29 05:26:09,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:09,446 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:26:09,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514271283] [2023-11-29 05:26:09,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514271283] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:09,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:26:09,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 05:26:09,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178941959] [2023-11-29 05:26:09,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:09,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:26:09,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:26:09,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:26:09,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:26:11,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 79 [2023-11-29 05:26:11,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 75 transitions, 218 flow. Second operand has 10 states, 10 states have (on average 47.6) internal successors, (476), 10 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:11,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:11,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 79 [2023-11-29 05:26:11,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:12,171 INFO L124 PetriNetUnfolderBase]: 1770/3336 cut-off events. [2023-11-29 05:26:12,171 INFO L125 PetriNetUnfolderBase]: For 31/34 co-relation queries the response was YES. [2023-11-29 05:26:12,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5804 conditions, 3336 events. 1770/3336 cut-off events. For 31/34 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22549 event pairs, 508 based on Foata normal form. 0/2449 useless extension candidates. Maximal degree in co-relation 5790. Up to 1164 conditions per place. [2023-11-29 05:26:12,186 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 66 selfloop transitions, 12 changer transitions 0/111 dead transitions. [2023-11-29 05:26:12,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 111 transitions, 450 flow [2023-11-29 05:26:12,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:26:12,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:26:12,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 441 transitions. [2023-11-29 05:26:12,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6977848101265823 [2023-11-29 05:26:12,189 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 441 transitions. [2023-11-29 05:26:12,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 441 transitions. [2023-11-29 05:26:12,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:12,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 441 transitions. [2023-11-29 05:26:12,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 55.125) internal successors, (441), 8 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:12,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:12,192 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:12,192 INFO L175 Difference]: Start difference. First operand has 82 places, 75 transitions, 218 flow. Second operand 8 states and 441 transitions. [2023-11-29 05:26:12,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 111 transitions, 450 flow [2023-11-29 05:26:12,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 111 transitions, 442 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:26:12,195 INFO L231 Difference]: Finished difference. Result has 87 places, 79 transitions, 262 flow [2023-11-29 05:26:12,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=262, PETRI_PLACES=87, PETRI_TRANSITIONS=79} [2023-11-29 05:26:12,195 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 9 predicate places. [2023-11-29 05:26:12,195 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 79 transitions, 262 flow [2023-11-29 05:26:12,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 47.6) internal successors, (476), 10 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:12,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:12,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:12,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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)] Ended with exit code 0 [2023-11-29 05:26:12,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:12,396 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:26:12,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:12,397 INFO L85 PathProgramCache]: Analyzing trace with hash -463147817, now seen corresponding path program 1 times [2023-11-29 05:26:12,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:26:12,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440048470] [2023-11-29 05:26:12,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:12,397 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 [2023-11-29 05:26:12,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:26:12,398 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:26:12,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:12,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 05:26:12,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:12,470 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 [2023-11-29 05:26:12,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:12,477 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 [2023-11-29 05:26:12,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:12,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:26:12,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:12,487 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 [2023-11-29 05:26:12,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:12,499 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 [2023-11-29 05:26:12,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:12,505 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 [2023-11-29 05:26:12,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:12,510 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 [2023-11-29 05:26:12,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:12,515 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 [2023-11-29 05:26:12,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:12,519 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 [2023-11-29 05:26:12,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:12,524 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 [2023-11-29 05:26:12,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:12,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 05:26:12,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:12,542 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 [2023-11-29 05:26:12,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:12,554 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 [2023-11-29 05:26:12,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:12,560 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 [2023-11-29 05:26:12,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:12,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-29 05:26:12,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:12,586 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 [2023-11-29 05:26:12,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:12,592 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 [2023-11-29 05:26:12,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:12,603 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 [2023-11-29 05:26:12,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:12,611 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 [2023-11-29 05:26:12,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:12,622 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 [2023-11-29 05:26:12,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:12,627 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 [2023-11-29 05:26:12,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:12,630 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 [2023-11-29 05:26:12,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:12,634 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 [2023-11-29 05:26:12,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:12,639 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 [2023-11-29 05:26:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:26:12,658 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:26:12,658 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:26:12,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440048470] [2023-11-29 05:26:12,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440048470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:12,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:12,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:26:12,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783746782] [2023-11-29 05:26:12,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:12,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:26:12,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:26:12,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:26:12,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:26:12,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 79 [2023-11-29 05:26:12,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 79 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:12,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:12,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 79 [2023-11-29 05:26:12,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:13,211 INFO L124 PetriNetUnfolderBase]: 2235/3737 cut-off events. [2023-11-29 05:26:13,211 INFO L125 PetriNetUnfolderBase]: For 1326/1329 co-relation queries the response was YES. [2023-11-29 05:26:13,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7842 conditions, 3737 events. 2235/3737 cut-off events. For 1326/1329 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21903 event pairs, 1437 based on Foata normal form. 142/3398 useless extension candidates. Maximal degree in co-relation 7826. Up to 2985 conditions per place. [2023-11-29 05:26:13,229 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 42 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2023-11-29 05:26:13,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 73 transitions, 344 flow [2023-11-29 05:26:13,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:26:13,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 05:26:13,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 190 transitions. [2023-11-29 05:26:13,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6012658227848101 [2023-11-29 05:26:13,230 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 190 transitions. [2023-11-29 05:26:13,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 190 transitions. [2023-11-29 05:26:13,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:13,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 190 transitions. [2023-11-29 05:26:13,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:13,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:13,233 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:13,233 INFO L175 Difference]: Start difference. First operand has 87 places, 79 transitions, 262 flow. Second operand 4 states and 190 transitions. [2023-11-29 05:26:13,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 73 transitions, 344 flow [2023-11-29 05:26:13,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 73 transitions, 338 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:26:13,236 INFO L231 Difference]: Finished difference. Result has 81 places, 73 transitions, 254 flow [2023-11-29 05:26:13,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=81, PETRI_TRANSITIONS=73} [2023-11-29 05:26:13,237 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2023-11-29 05:26:13,237 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 73 transitions, 254 flow [2023-11-29 05:26:13,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:13,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:13,237 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-29 05:26:13,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:13,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:13,438 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:26:13,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:13,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1596830192, now seen corresponding path program 2 times [2023-11-29 05:26:13,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:26:13,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889904790] [2023-11-29 05:26:13,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:26:13,439 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 [2023-11-29 05:26:13,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:26:13,440 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:26:13,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:13,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:26:13,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:26:13,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 05:26:13,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:13,539 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 [2023-11-29 05:26:13,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:13,549 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 [2023-11-29 05:26:13,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:13,558 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 [2023-11-29 05:26:13,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:13,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:26:13,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:13,572 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 [2023-11-29 05:26:13,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:13,576 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 [2023-11-29 05:26:13,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:13,582 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 [2023-11-29 05:26:13,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:13,589 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 [2023-11-29 05:26:13,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:13,605 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 [2023-11-29 05:26:13,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:13,612 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 [2023-11-29 05:26:13,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:13,620 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 [2023-11-29 05:26:13,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:13,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:26:13,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:13,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:26:13,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:13,682 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 [2023-11-29 05:26:13,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:13,702 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 [2023-11-29 05:26:13,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:13,712 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 [2023-11-29 05:26:13,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:13,724 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 [2023-11-29 05:26:13,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:13,740 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 [2023-11-29 05:26:13,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:13,751 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 [2023-11-29 05:26:13,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:13,767 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 [2023-11-29 05:26:13,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:13,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:26:13,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:13,782 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 [2023-11-29 05:26:13,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:13,792 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 [2023-11-29 05:26:13,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:13,798 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 [2023-11-29 05:26:14,018 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:14,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:14,677 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:26:14,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889904790] [2023-11-29 05:26:14,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889904790] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:14,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:26:14,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 05:26:14,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229523623] [2023-11-29 05:26:14,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:14,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:26:14,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:26:14,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:26:14,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:26:19,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 79 [2023-11-29 05:26:19,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 73 transitions, 254 flow. Second operand has 14 states, 14 states have (on average 48.57142857142857) internal successors, (680), 14 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:19,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:19,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 79 [2023-11-29 05:26:19,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:22,346 INFO L124 PetriNetUnfolderBase]: 1289/2401 cut-off events. [2023-11-29 05:26:22,346 INFO L125 PetriNetUnfolderBase]: For 893/984 co-relation queries the response was YES. [2023-11-29 05:26:22,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4801 conditions, 2401 events. 1289/2401 cut-off events. For 893/984 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 14916 event pairs, 742 based on Foata normal form. 50/1980 useless extension candidates. Maximal degree in co-relation 4785. Up to 1710 conditions per place. [2023-11-29 05:26:22,357 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 32 selfloop transitions, 30 changer transitions 0/91 dead transitions. [2023-11-29 05:26:22,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 91 transitions, 492 flow [2023-11-29 05:26:22,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 05:26:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 05:26:22,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1099 transitions. [2023-11-29 05:26:22,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6323360184119677 [2023-11-29 05:26:22,362 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1099 transitions. [2023-11-29 05:26:22,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1099 transitions. [2023-11-29 05:26:22,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:22,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1099 transitions. [2023-11-29 05:26:22,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 49.95454545454545) internal successors, (1099), 22 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:22,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 79.0) internal successors, (1817), 23 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:22,368 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 79.0) internal successors, (1817), 23 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:22,369 INFO L175 Difference]: Start difference. First operand has 81 places, 73 transitions, 254 flow. Second operand 22 states and 1099 transitions. [2023-11-29 05:26:22,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 91 transitions, 492 flow [2023-11-29 05:26:22,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 91 transitions, 480 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 05:26:22,372 INFO L231 Difference]: Finished difference. Result has 106 places, 91 transitions, 446 flow [2023-11-29 05:26:22,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=446, PETRI_PLACES=106, PETRI_TRANSITIONS=91} [2023-11-29 05:26:22,372 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 28 predicate places. [2023-11-29 05:26:22,373 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 91 transitions, 446 flow [2023-11-29 05:26:22,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 48.57142857142857) internal successors, (680), 14 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:22,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:22,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:22,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:22,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:22,574 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:26:22,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:22,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1483134595, now seen corresponding path program 1 times [2023-11-29 05:26:22,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:26:22,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770961842] [2023-11-29 05:26:22,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:22,575 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 [2023-11-29 05:26:22,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:26:22,576 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:26:22,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:22,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:26:22,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:22,733 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 05:26:22,733 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 [2023-11-29 05:26:22,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:22,783 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 05:26:22,783 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 [2023-11-29 05:26:22,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:22,812 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 05:26:22,812 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 [2023-11-29 05:26:22,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:22,839 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 05:26:22,839 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 [2023-11-29 05:26:22,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:22,874 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 05:26:22,875 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 [2023-11-29 05:26:22,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:22,901 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 05:26:22,901 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 [2023-11-29 05:26:22,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:22,942 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 05:26:22,943 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 [2023-11-29 05:26:22,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:22,985 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 05:26:22,985 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 [2023-11-29 05:26:23,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:23,012 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 05:26:23,012 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 [2023-11-29 05:26:23,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:23,048 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 05:26:23,049 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 [2023-11-29 05:26:23,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:23,100 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 05:26:23,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2023-11-29 05:26:23,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:23,138 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 05:26:23,138 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 [2023-11-29 05:26:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:23,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:24,268 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:26:24,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770961842] [2023-11-29 05:26:24,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770961842] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:24,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:26:24,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 05:26:24,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935052466] [2023-11-29 05:26:24,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:24,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:26:24,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:26:24,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:26:24,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:26:26,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 79 [2023-11-29 05:26:26,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 91 transitions, 446 flow. Second operand has 10 states, 10 states have (on average 45.8) internal successors, (458), 10 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:26,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:26,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 79 [2023-11-29 05:26:26,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:27,110 INFO L124 PetriNetUnfolderBase]: 1423/2526 cut-off events. [2023-11-29 05:26:27,110 INFO L125 PetriNetUnfolderBase]: For 979/1079 co-relation queries the response was YES. [2023-11-29 05:26:27,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5234 conditions, 2526 events. 1423/2526 cut-off events. For 979/1079 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 15071 event pairs, 835 based on Foata normal form. 50/2147 useless extension candidates. Maximal degree in co-relation 5212. Up to 1909 conditions per place. [2023-11-29 05:26:27,123 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 58 selfloop transitions, 5 changer transitions 0/89 dead transitions. [2023-11-29 05:26:27,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 89 transitions, 568 flow [2023-11-29 05:26:27,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:26:27,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:26:27,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 302 transitions. [2023-11-29 05:26:27,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371308016877637 [2023-11-29 05:26:27,125 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 302 transitions. [2023-11-29 05:26:27,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 302 transitions. [2023-11-29 05:26:27,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:27,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 302 transitions. [2023-11-29 05:26:27,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 50.333333333333336) internal successors, (302), 6 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:27,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:27,126 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:27,127 INFO L175 Difference]: Start difference. First operand has 106 places, 91 transitions, 446 flow. Second operand 6 states and 302 transitions. [2023-11-29 05:26:27,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 89 transitions, 568 flow [2023-11-29 05:26:27,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 89 transitions, 490 flow, removed 27 selfloop flow, removed 9 redundant places. [2023-11-29 05:26:27,130 INFO L231 Difference]: Finished difference. Result has 100 places, 89 transitions, 374 flow [2023-11-29 05:26:27,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=374, PETRI_PLACES=100, PETRI_TRANSITIONS=89} [2023-11-29 05:26:27,131 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 22 predicate places. [2023-11-29 05:26:27,131 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 89 transitions, 374 flow [2023-11-29 05:26:27,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 45.8) internal successors, (458), 10 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:27,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:27,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:27,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:27,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:27,335 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:26:27,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:27,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1483134596, now seen corresponding path program 1 times [2023-11-29 05:26:27,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:26:27,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865157671] [2023-11-29 05:26:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:27,335 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 [2023-11-29 05:26:27,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:26:27,336 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:26:27,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:27,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:26:27,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:27,459 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:26:27,460 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 [2023-11-29 05:26:27,475 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:26:27,475 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 [2023-11-29 05:26:27,497 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:26:27,497 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 [2023-11-29 05:26:27,514 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:26:27,514 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 [2023-11-29 05:26:27,534 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:26:27,534 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 [2023-11-29 05:26:27,547 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:26:27,548 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 [2023-11-29 05:26:27,567 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:26:27,568 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 [2023-11-29 05:26:27,593 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:26:27,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-11-29 05:26:27,613 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:26:27,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 05:26:27,628 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:26:27,628 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 [2023-11-29 05:26:27,641 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:26:27,641 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 [2023-11-29 05:26:27,661 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 05:26:27,661 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 [2023-11-29 05:26:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:26:27,815 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:26:27,815 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:26:27,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865157671] [2023-11-29 05:26:27,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [865157671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:27,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:27,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 05:26:27,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068954446] [2023-11-29 05:26:27,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:27,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:26:27,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:26:27,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:26:27,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:26:27,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 79 [2023-11-29 05:26:27,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 89 transitions, 374 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:27,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:27,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 79 [2023-11-29 05:26:27,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:28,250 INFO L124 PetriNetUnfolderBase]: 1423/2510 cut-off events. [2023-11-29 05:26:28,250 INFO L125 PetriNetUnfolderBase]: For 979/1079 co-relation queries the response was YES. [2023-11-29 05:26:28,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5184 conditions, 2510 events. 1423/2510 cut-off events. For 979/1079 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 14855 event pairs, 835 based on Foata normal form. 50/2131 useless extension candidates. Maximal degree in co-relation 5162. Up to 1913 conditions per place. [2023-11-29 05:26:28,261 INFO L140 encePairwiseOnDemand]: 76/79 looper letters, 62 selfloop transitions, 1 changer transitions 0/87 dead transitions. [2023-11-29 05:26:28,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 87 transitions, 496 flow [2023-11-29 05:26:28,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:26:28,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:26:28,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2023-11-29 05:26:28,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6962025316455697 [2023-11-29 05:26:28,263 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 165 transitions. [2023-11-29 05:26:28,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 165 transitions. [2023-11-29 05:26:28,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:28,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 165 transitions. [2023-11-29 05:26:28,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:28,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:28,264 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:28,265 INFO L175 Difference]: Start difference. First operand has 100 places, 89 transitions, 374 flow. Second operand 3 states and 165 transitions. [2023-11-29 05:26:28,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 87 transitions, 496 flow [2023-11-29 05:26:28,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 87 transitions, 488 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:26:28,268 INFO L231 Difference]: Finished difference. Result has 96 places, 87 transitions, 364 flow [2023-11-29 05:26:28,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=364, PETRI_PLACES=96, PETRI_TRANSITIONS=87} [2023-11-29 05:26:28,269 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 18 predicate places. [2023-11-29 05:26:28,269 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 87 transitions, 364 flow [2023-11-29 05:26:28,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:28,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:28,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:28,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:28,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:28,470 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:26:28,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:28,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1472679958, now seen corresponding path program 1 times [2023-11-29 05:26:28,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:26:28,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785092011] [2023-11-29 05:26:28,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:28,471 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 [2023-11-29 05:26:28,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:26:28,472 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:26:28,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:28,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:26:28,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:28,565 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 [2023-11-29 05:26:28,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:28,574 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 [2023-11-29 05:26:28,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:28,583 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 [2023-11-29 05:26:28,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:28,600 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 [2023-11-29 05:26:28,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:28,608 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 [2023-11-29 05:26:28,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:28,613 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 [2023-11-29 05:26:28,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:28,622 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 [2023-11-29 05:26:28,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:28,627 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 [2023-11-29 05:26:28,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:28,636 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 [2023-11-29 05:26:28,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:28,651 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 [2023-11-29 05:26:28,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:28,660 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 [2023-11-29 05:26:28,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:28,665 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 [2023-11-29 05:26:28,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:28,683 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 [2023-11-29 05:26:28,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:28,691 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 [2023-11-29 05:26:28,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:28,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:26:28,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:28,732 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 [2023-11-29 05:26:28,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:28,741 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 [2023-11-29 05:26:28,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:28,755 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 [2023-11-29 05:26:28,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:28,763 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 [2023-11-29 05:26:28,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:28,776 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 [2023-11-29 05:26:28,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:28,785 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 [2023-11-29 05:26:28,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:28,790 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 [2023-11-29 05:26:28,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:28,798 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 [2023-11-29 05:26:28,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:28,803 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 [2023-11-29 05:26:28,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:26:28,974 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:26:28,974 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:26:28,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785092011] [2023-11-29 05:26:28,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785092011] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:28,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:28,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:26:28,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445277629] [2023-11-29 05:26:28,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:28,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:26:28,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:26:28,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:26:28,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:26:29,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 79 [2023-11-29 05:26:29,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 87 transitions, 364 flow. Second operand has 6 states, 6 states have (on average 47.333333333333336) internal successors, (284), 6 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:29,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:29,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 79 [2023-11-29 05:26:29,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:30,428 INFO L124 PetriNetUnfolderBase]: 1540/2806 cut-off events. [2023-11-29 05:26:30,428 INFO L125 PetriNetUnfolderBase]: For 841/887 co-relation queries the response was YES. [2023-11-29 05:26:30,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5655 conditions, 2806 events. 1540/2806 cut-off events. For 841/887 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17349 event pairs, 625 based on Foata normal form. 30/2293 useless extension candidates. Maximal degree in co-relation 5633. Up to 1548 conditions per place. [2023-11-29 05:26:30,441 INFO L140 encePairwiseOnDemand]: 72/79 looper letters, 80 selfloop transitions, 15 changer transitions 0/119 dead transitions. [2023-11-29 05:26:30,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 119 transitions, 622 flow [2023-11-29 05:26:30,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:26:30,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:26:30,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 342 transitions. [2023-11-29 05:26:30,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7215189873417721 [2023-11-29 05:26:30,443 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 342 transitions. [2023-11-29 05:26:30,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 342 transitions. [2023-11-29 05:26:30,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:30,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 342 transitions. [2023-11-29 05:26:30,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:30,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:30,445 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:30,445 INFO L175 Difference]: Start difference. First operand has 96 places, 87 transitions, 364 flow. Second operand 6 states and 342 transitions. [2023-11-29 05:26:30,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 119 transitions, 622 flow [2023-11-29 05:26:30,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 119 transitions, 621 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 05:26:30,451 INFO L231 Difference]: Finished difference. Result has 102 places, 88 transitions, 404 flow [2023-11-29 05:26:30,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=404, PETRI_PLACES=102, PETRI_TRANSITIONS=88} [2023-11-29 05:26:30,452 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 24 predicate places. [2023-11-29 05:26:30,452 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 88 transitions, 404 flow [2023-11-29 05:26:30,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 47.333333333333336) internal successors, (284), 6 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:30,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:30,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:30,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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)] Ended with exit code 0 [2023-11-29 05:26:30,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:30,653 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:26:30,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:30,653 INFO L85 PathProgramCache]: Analyzing trace with hash 637869164, now seen corresponding path program 1 times [2023-11-29 05:26:30,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:26:30,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579247407] [2023-11-29 05:26:30,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:30,654 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 [2023-11-29 05:26:30,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:26:30,655 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:26:30,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:30,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:26:30,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:30,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:31,003 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 25 treesize of output 21 [2023-11-29 05:26:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:31,073 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:26:31,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579247407] [2023-11-29 05:26:31,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579247407] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:31,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:26:31,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 05:26:31,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262550272] [2023-11-29 05:26:31,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:31,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:26:31,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:26:31,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:26:31,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:26:33,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 79 [2023-11-29 05:26:33,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 88 transitions, 404 flow. Second operand has 10 states, 10 states have (on average 48.0) internal successors, (480), 10 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:33,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:33,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 79 [2023-11-29 05:26:33,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:34,400 INFO L124 PetriNetUnfolderBase]: 3030/5029 cut-off events. [2023-11-29 05:26:34,401 INFO L125 PetriNetUnfolderBase]: For 4271/4470 co-relation queries the response was YES. [2023-11-29 05:26:34,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11614 conditions, 5029 events. 3030/5029 cut-off events. For 4271/4470 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 31609 event pairs, 847 based on Foata normal form. 89/4306 useless extension candidates. Maximal degree in co-relation 11589. Up to 1928 conditions per place. [2023-11-29 05:26:34,432 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 88 selfloop transitions, 18 changer transitions 0/130 dead transitions. [2023-11-29 05:26:34,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 130 transitions, 772 flow [2023-11-29 05:26:34,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:26:34,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:26:34,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 439 transitions. [2023-11-29 05:26:34,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.694620253164557 [2023-11-29 05:26:34,435 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 439 transitions. [2023-11-29 05:26:34,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 439 transitions. [2023-11-29 05:26:34,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:34,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 439 transitions. [2023-11-29 05:26:34,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 54.875) internal successors, (439), 8 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:34,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:34,438 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:34,439 INFO L175 Difference]: Start difference. First operand has 102 places, 88 transitions, 404 flow. Second operand 8 states and 439 transitions. [2023-11-29 05:26:34,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 130 transitions, 772 flow [2023-11-29 05:26:34,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 130 transitions, 732 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:26:34,445 INFO L231 Difference]: Finished difference. Result has 107 places, 92 transitions, 446 flow [2023-11-29 05:26:34,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=446, PETRI_PLACES=107, PETRI_TRANSITIONS=92} [2023-11-29 05:26:34,446 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 29 predicate places. [2023-11-29 05:26:34,446 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 92 transitions, 446 flow [2023-11-29 05:26:34,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 48.0) internal successors, (480), 10 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:34,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:34,447 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:34,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:34,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:34,647 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:26:34,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:34,648 INFO L85 PathProgramCache]: Analyzing trace with hash 2094788451, now seen corresponding path program 1 times [2023-11-29 05:26:34,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:26:34,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076472286] [2023-11-29 05:26:34,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:34,648 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 [2023-11-29 05:26:34,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:26:34,649 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:26:34,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:34,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:26:34,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:26:34,726 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:26:34,726 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:26:34,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076472286] [2023-11-29 05:26:34,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076472286] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:34,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:34,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:26:34,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102659330] [2023-11-29 05:26:34,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:34,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:26:34,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:26:34,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:26:34,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:26:34,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 79 [2023-11-29 05:26:34,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 92 transitions, 446 flow. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:34,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:34,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 79 [2023-11-29 05:26:34,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:35,594 INFO L124 PetriNetUnfolderBase]: 3528/5752 cut-off events. [2023-11-29 05:26:35,594 INFO L125 PetriNetUnfolderBase]: For 3900/4131 co-relation queries the response was YES. [2023-11-29 05:26:35,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14004 conditions, 5752 events. 3528/5752 cut-off events. For 3900/4131 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 35923 event pairs, 725 based on Foata normal form. 114/5296 useless extension candidates. Maximal degree in co-relation 13977. Up to 2277 conditions per place. [2023-11-29 05:26:35,626 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 112 selfloop transitions, 15 changer transitions 0/152 dead transitions. [2023-11-29 05:26:35,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 152 transitions, 886 flow [2023-11-29 05:26:35,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:26:35,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:26:35,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 316 transitions. [2023-11-29 05:26:35,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8 [2023-11-29 05:26:35,627 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 316 transitions. [2023-11-29 05:26:35,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 316 transitions. [2023-11-29 05:26:35,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:35,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 316 transitions. [2023-11-29 05:26:35,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.2) internal successors, (316), 5 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:35,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:35,629 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:35,629 INFO L175 Difference]: Start difference. First operand has 107 places, 92 transitions, 446 flow. Second operand 5 states and 316 transitions. [2023-11-29 05:26:35,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 152 transitions, 886 flow [2023-11-29 05:26:35,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 152 transitions, 870 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:26:35,636 INFO L231 Difference]: Finished difference. Result has 109 places, 94 transitions, 483 flow [2023-11-29 05:26:35,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=483, PETRI_PLACES=109, PETRI_TRANSITIONS=94} [2023-11-29 05:26:35,637 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 31 predicate places. [2023-11-29 05:26:35,637 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 94 transitions, 483 flow [2023-11-29 05:26:35,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:35,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:35,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:35,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:35,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:35,838 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:26:35,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:35,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1700891934, now seen corresponding path program 1 times [2023-11-29 05:26:35,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:26:35,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531672721] [2023-11-29 05:26:35,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:35,839 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 [2023-11-29 05:26:35,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:26:35,840 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:26:35,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:35,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:26:35,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:35,930 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 [2023-11-29 05:26:35,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:35,941 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 [2023-11-29 05:26:35,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:35,950 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 [2023-11-29 05:26:35,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:35,964 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 [2023-11-29 05:26:35,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:35,970 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 [2023-11-29 05:26:35,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:35,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:26:35,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:35,987 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 [2023-11-29 05:26:36,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:36,002 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 [2023-11-29 05:26:36,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:36,007 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 [2023-11-29 05:26:36,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:36,015 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 [2023-11-29 05:26:36,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:36,023 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 [2023-11-29 05:26:36,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:36,052 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 [2023-11-29 05:26:36,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:36,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:26:36,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:36,097 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 [2023-11-29 05:26:36,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:36,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:26:36,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:36,140 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 [2023-11-29 05:26:36,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:36,148 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 [2023-11-29 05:26:36,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:36,164 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 [2023-11-29 05:26:36,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:36,180 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 [2023-11-29 05:26:36,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:36,188 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 [2023-11-29 05:26:36,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:36,195 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 [2023-11-29 05:26:36,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:36,201 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 [2023-11-29 05:26:36,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:36,206 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 [2023-11-29 05:26:36,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:36,213 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 [2023-11-29 05:26:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:26:36,471 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:26:36,471 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:26:36,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531672721] [2023-11-29 05:26:36,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531672721] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:36,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:36,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:26:36,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000878282] [2023-11-29 05:26:36,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:36,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:26:36,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:26:36,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:26:36,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:26:37,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 79 [2023-11-29 05:26:37,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 94 transitions, 483 flow. Second operand has 6 states, 6 states have (on average 47.666666666666664) internal successors, (286), 6 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:37,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:37,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 79 [2023-11-29 05:26:37,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:38,112 INFO L124 PetriNetUnfolderBase]: 2834/5286 cut-off events. [2023-11-29 05:26:38,112 INFO L125 PetriNetUnfolderBase]: For 5232/5328 co-relation queries the response was YES. [2023-11-29 05:26:38,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12591 conditions, 5286 events. 2834/5286 cut-off events. For 5232/5328 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 37191 event pairs, 1187 based on Foata normal form. 55/4508 useless extension candidates. Maximal degree in co-relation 12564. Up to 2851 conditions per place. [2023-11-29 05:26:38,141 INFO L140 encePairwiseOnDemand]: 72/79 looper letters, 93 selfloop transitions, 15 changer transitions 0/134 dead transitions. [2023-11-29 05:26:38,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 134 transitions, 863 flow [2023-11-29 05:26:38,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:26:38,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:26:38,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 340 transitions. [2023-11-29 05:26:38,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7172995780590717 [2023-11-29 05:26:38,143 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 340 transitions. [2023-11-29 05:26:38,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 340 transitions. [2023-11-29 05:26:38,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:38,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 340 transitions. [2023-11-29 05:26:38,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.666666666666664) internal successors, (340), 6 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:38,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:38,146 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:38,146 INFO L175 Difference]: Start difference. First operand has 109 places, 94 transitions, 483 flow. Second operand 6 states and 340 transitions. [2023-11-29 05:26:38,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 134 transitions, 863 flow [2023-11-29 05:26:38,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 134 transitions, 863 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 05:26:38,151 INFO L231 Difference]: Finished difference. Result has 116 places, 95 transitions, 524 flow [2023-11-29 05:26:38,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=524, PETRI_PLACES=116, PETRI_TRANSITIONS=95} [2023-11-29 05:26:38,151 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 38 predicate places. [2023-11-29 05:26:38,151 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 95 transitions, 524 flow [2023-11-29 05:26:38,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 47.666666666666664) internal successors, (286), 6 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:38,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:38,151 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:38,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:38,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:38,352 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:26:38,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:38,352 INFO L85 PathProgramCache]: Analyzing trace with hash 2083010312, now seen corresponding path program 1 times [2023-11-29 05:26:38,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:26:38,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414717589] [2023-11-29 05:26:38,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:38,353 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 [2023-11-29 05:26:38,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:26:38,354 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:26:38,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:38,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:26:38,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:26:38,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:38,633 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 11 treesize of output 9 [2023-11-29 05:26:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:26:38,777 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:26:38,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1414717589] [2023-11-29 05:26:38,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1414717589] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:38,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:26:38,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-29 05:26:38,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971737352] [2023-11-29 05:26:38,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:38,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:26:38,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:26:38,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:26:38,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:26:41,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2023-11-29 05:26:41,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 95 transitions, 524 flow. Second operand has 12 states, 12 states have (on average 45.0) internal successors, (540), 12 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:41,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:41,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2023-11-29 05:26:41,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:44,910 INFO L124 PetriNetUnfolderBase]: 13117/19504 cut-off events. [2023-11-29 05:26:44,910 INFO L125 PetriNetUnfolderBase]: For 21938/21944 co-relation queries the response was YES. [2023-11-29 05:26:45,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57076 conditions, 19504 events. 13117/19504 cut-off events. For 21938/21944 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 120526 event pairs, 1745 based on Foata normal form. 426/19089 useless extension candidates. Maximal degree in co-relation 57045. Up to 4464 conditions per place. [2023-11-29 05:26:45,109 INFO L140 encePairwiseOnDemand]: 67/79 looper letters, 260 selfloop transitions, 37 changer transitions 0/318 dead transitions. [2023-11-29 05:26:45,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 318 transitions, 1998 flow [2023-11-29 05:26:45,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:26:45,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 05:26:45,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 780 transitions. [2023-11-29 05:26:45,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.759493670886076 [2023-11-29 05:26:45,114 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 780 transitions. [2023-11-29 05:26:45,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 780 transitions. [2023-11-29 05:26:45,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:45,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 780 transitions. [2023-11-29 05:26:45,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 60.0) internal successors, (780), 13 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:45,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 79.0) internal successors, (1106), 14 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:45,120 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 79.0) internal successors, (1106), 14 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:45,120 INFO L175 Difference]: Start difference. First operand has 116 places, 95 transitions, 524 flow. Second operand 13 states and 780 transitions. [2023-11-29 05:26:45,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 318 transitions, 1998 flow [2023-11-29 05:26:45,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 318 transitions, 1916 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 05:26:45,168 INFO L231 Difference]: Finished difference. Result has 130 places, 115 transitions, 726 flow [2023-11-29 05:26:45,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=726, PETRI_PLACES=130, PETRI_TRANSITIONS=115} [2023-11-29 05:26:45,169 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 52 predicate places. [2023-11-29 05:26:45,169 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 115 transitions, 726 flow [2023-11-29 05:26:45,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 45.0) internal successors, (540), 12 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:45,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:45,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:45,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:45,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:45,370 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:26:45,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:45,371 INFO L85 PathProgramCache]: Analyzing trace with hash 393706921, now seen corresponding path program 1 times [2023-11-29 05:26:45,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:26:45,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071159467] [2023-11-29 05:26:45,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:45,371 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 [2023-11-29 05:26:45,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:26:45,372 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:26:45,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:45,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:45,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:26:45,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:45,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:45,874 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:26:45,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071159467] [2023-11-29 05:26:45,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071159467] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:45,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:26:45,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-29 05:26:45,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202399696] [2023-11-29 05:26:45,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:45,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:26:45,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:26:45,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:26:45,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:26:46,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 79 [2023-11-29 05:26:46,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 115 transitions, 726 flow. Second operand has 12 states, 12 states have (on average 49.833333333333336) internal successors, (598), 12 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:46,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:46,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 79 [2023-11-29 05:26:46,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:49,173 INFO L124 PetriNetUnfolderBase]: 11866/20663 cut-off events. [2023-11-29 05:26:49,173 INFO L125 PetriNetUnfolderBase]: For 38844/39888 co-relation queries the response was YES. [2023-11-29 05:26:49,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65814 conditions, 20663 events. 11866/20663 cut-off events. For 38844/39888 co-relation queries the response was YES. Maximal size of possible extension queue 743. Compared 163427 event pairs, 6054 based on Foata normal form. 334/19574 useless extension candidates. Maximal degree in co-relation 65777. Up to 9705 conditions per place. [2023-11-29 05:26:49,484 INFO L140 encePairwiseOnDemand]: 72/79 looper letters, 135 selfloop transitions, 25 changer transitions 0/194 dead transitions. [2023-11-29 05:26:49,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 194 transitions, 1552 flow [2023-11-29 05:26:49,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:26:49,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:26:49,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 454 transitions. [2023-11-29 05:26:49,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7183544303797469 [2023-11-29 05:26:49,486 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 454 transitions. [2023-11-29 05:26:49,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 454 transitions. [2023-11-29 05:26:49,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:49,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 454 transitions. [2023-11-29 05:26:49,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 56.75) internal successors, (454), 8 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:49,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:49,489 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:49,489 INFO L175 Difference]: Start difference. First operand has 130 places, 115 transitions, 726 flow. Second operand 8 states and 454 transitions. [2023-11-29 05:26:49,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 194 transitions, 1552 flow [2023-11-29 05:26:49,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 194 transitions, 1474 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-11-29 05:26:49,565 INFO L231 Difference]: Finished difference. Result has 134 places, 117 transitions, 747 flow [2023-11-29 05:26:49,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=747, PETRI_PLACES=134, PETRI_TRANSITIONS=117} [2023-11-29 05:26:49,566 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 56 predicate places. [2023-11-29 05:26:49,566 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 117 transitions, 747 flow [2023-11-29 05:26:49,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 49.833333333333336) internal successors, (598), 12 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:49,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:49,566 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:49,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:49,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:49,767 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:26:49,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:49,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1826411995, now seen corresponding path program 1 times [2023-11-29 05:26:49,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:26:49,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9384696] [2023-11-29 05:26:49,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:49,767 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:26:49,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:26:49,768 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:26:49,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:49,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:49,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:26:49,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:26:49,858 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:26:49,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:26:49,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9384696] [2023-11-29 05:26:49,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9384696] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:26:49,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:26:49,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:26:49,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535535409] [2023-11-29 05:26:49,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:26:49,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:26:49,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:26:49,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:26:49,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:26:49,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 79 [2023-11-29 05:26:49,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 117 transitions, 747 flow. Second operand has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:49,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:26:49,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 79 [2023-11-29 05:26:49,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:26:53,273 INFO L124 PetriNetUnfolderBase]: 15860/25286 cut-off events. [2023-11-29 05:26:53,273 INFO L125 PetriNetUnfolderBase]: For 46835/47886 co-relation queries the response was YES. [2023-11-29 05:26:53,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82480 conditions, 25286 events. 15860/25286 cut-off events. For 46835/47886 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 181737 event pairs, 3264 based on Foata normal form. 615/24389 useless extension candidates. Maximal degree in co-relation 82441. Up to 9823 conditions per place. [2023-11-29 05:26:53,502 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 176 selfloop transitions, 17 changer transitions 0/225 dead transitions. [2023-11-29 05:26:53,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 225 transitions, 1779 flow [2023-11-29 05:26:53,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:26:53,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:26:53,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 312 transitions. [2023-11-29 05:26:53,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.789873417721519 [2023-11-29 05:26:53,503 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 312 transitions. [2023-11-29 05:26:53,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 312 transitions. [2023-11-29 05:26:53,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:26:53,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 312 transitions. [2023-11-29 05:26:53,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 62.4) internal successors, (312), 5 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) [2023-11-29 05:26:53,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:53,505 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:53,505 INFO L175 Difference]: Start difference. First operand has 134 places, 117 transitions, 747 flow. Second operand 5 states and 312 transitions. [2023-11-29 05:26:53,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 225 transitions, 1779 flow [2023-11-29 05:26:53,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 225 transitions, 1772 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 05:26:53,572 INFO L231 Difference]: Finished difference. Result has 137 places, 120 transitions, 806 flow [2023-11-29 05:26:53,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=806, PETRI_PLACES=137, PETRI_TRANSITIONS=120} [2023-11-29 05:26:53,573 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 59 predicate places. [2023-11-29 05:26:53,573 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 120 transitions, 806 flow [2023-11-29 05:26:53,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:26:53,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:26:53,573 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:26:53,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:53,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:53,774 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:26:53,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:26:53,774 INFO L85 PathProgramCache]: Analyzing trace with hash 148810682, now seen corresponding path program 1 times [2023-11-29 05:26:53,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:26:53,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110802720] [2023-11-29 05:26:53,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:26:53,775 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 [2023-11-29 05:26:53,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:26:53,776 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:26:53,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:26:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:26:53,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:26:53,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:26:53,875 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 [2023-11-29 05:26:53,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:53,886 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 [2023-11-29 05:26:53,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:53,901 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 [2023-11-29 05:26:53,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:53,908 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 [2023-11-29 05:26:53,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:53,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:26:53,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:53,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:26:53,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:53,960 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 [2023-11-29 05:26:53,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:53,965 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 [2023-11-29 05:26:53,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:53,981 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 [2023-11-29 05:26:53,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:53,990 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 [2023-11-29 05:26:53,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:53,996 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 [2023-11-29 05:26:54,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:54,004 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 [2023-11-29 05:26:54,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:54,021 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 [2023-11-29 05:26:54,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:54,030 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 [2023-11-29 05:26:54,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:54,039 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 [2023-11-29 05:26:54,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:54,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 05:26:54,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:54,051 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 [2023-11-29 05:26:54,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:54,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:26:54,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:54,069 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 [2023-11-29 05:26:54,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:54,075 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 [2023-11-29 05:26:54,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:54,092 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 [2023-11-29 05:26:54,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:54,101 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 [2023-11-29 05:26:54,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:54,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:26:54,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:26:54,117 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 [2023-11-29 05:26:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:54,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:26:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:26:55,082 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:26:55,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110802720] [2023-11-29 05:26:55,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110802720] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:26:55,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:26:55,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2023-11-29 05:26:55,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881965824] [2023-11-29 05:26:55,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:26:55,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:26:55,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:26:55,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:26:55,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:27:00,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2023-11-29 05:27:00,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 120 transitions, 806 flow. Second operand has 12 states, 12 states have (on average 47.166666666666664) internal successors, (566), 12 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:00,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:00,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2023-11-29 05:27:00,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:03,913 INFO L124 PetriNetUnfolderBase]: 11952/19594 cut-off events. [2023-11-29 05:27:03,914 INFO L125 PetriNetUnfolderBase]: For 38775/39436 co-relation queries the response was YES. [2023-11-29 05:27:04,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65195 conditions, 19594 events. 11952/19594 cut-off events. For 38775/39436 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 139076 event pairs, 6742 based on Foata normal form. 151/18495 useless extension candidates. Maximal degree in co-relation 65155. Up to 12463 conditions per place. [2023-11-29 05:27:04,089 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 125 selfloop transitions, 32 changer transitions 0/185 dead transitions. [2023-11-29 05:27:04,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 185 transitions, 1458 flow [2023-11-29 05:27:04,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:27:04,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:27:04,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 447 transitions. [2023-11-29 05:27:04,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7072784810126582 [2023-11-29 05:27:04,091 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 447 transitions. [2023-11-29 05:27:04,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 447 transitions. [2023-11-29 05:27:04,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:04,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 447 transitions. [2023-11-29 05:27:04,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 55.875) internal successors, (447), 8 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:04,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:04,093 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:04,093 INFO L175 Difference]: Start difference. First operand has 137 places, 120 transitions, 806 flow. Second operand 8 states and 447 transitions. [2023-11-29 05:27:04,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 185 transitions, 1458 flow [2023-11-29 05:27:04,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 185 transitions, 1458 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-29 05:27:04,172 INFO L231 Difference]: Finished difference. Result has 146 places, 123 transitions, 915 flow [2023-11-29 05:27:04,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=915, PETRI_PLACES=146, PETRI_TRANSITIONS=123} [2023-11-29 05:27:04,173 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 68 predicate places. [2023-11-29 05:27:04,173 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 123 transitions, 915 flow [2023-11-29 05:27:04,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 47.166666666666664) internal successors, (566), 12 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:04,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:04,173 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:27:04,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:27:04,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:27:04,374 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:27:04,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:04,374 INFO L85 PathProgramCache]: Analyzing trace with hash 401972374, now seen corresponding path program 2 times [2023-11-29 05:27:04,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:27:04,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441221340] [2023-11-29 05:27:04,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:27:04,374 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 [2023-11-29 05:27:04,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:27:04,375 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:27:04,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:27:04,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 05:27:04,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:04,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:27:04,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:04,481 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 [2023-11-29 05:27:04,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:04,491 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 [2023-11-29 05:27:04,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:04,498 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 [2023-11-29 05:27:04,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:04,504 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 [2023-11-29 05:27:04,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:04,513 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 [2023-11-29 05:27:04,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:04,518 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 [2023-11-29 05:27:04,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:04,527 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 [2023-11-29 05:27:04,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:04,533 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 [2023-11-29 05:27:04,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:04,538 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 [2023-11-29 05:27:04,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:04,544 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 [2023-11-29 05:27:04,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:04,552 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 [2023-11-29 05:27:04,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:04,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:27:04,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:04,574 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 [2023-11-29 05:27:04,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:04,588 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 [2023-11-29 05:27:04,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:04,593 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 [2023-11-29 05:27:04,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:04,600 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 [2023-11-29 05:27:04,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:04,608 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 [2023-11-29 05:27:04,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:04,613 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 [2023-11-29 05:27:04,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:04,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:27:04,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:04,653 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 [2023-11-29 05:27:04,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:04,661 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 [2023-11-29 05:27:04,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:04,674 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 [2023-11-29 05:27:04,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:04,683 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 [2023-11-29 05:27:04,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:04,697 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 [2023-11-29 05:27:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:27:04,994 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:27:04,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:27:04,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441221340] [2023-11-29 05:27:04,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441221340] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:27:04,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:27:04,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:27:04,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584664758] [2023-11-29 05:27:04,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:27:04,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:27:04,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:27:04,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:27:04,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:27:05,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 79 [2023-11-29 05:27:05,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 123 transitions, 915 flow. Second operand has 6 states, 6 states have (on average 48.0) internal successors, (288), 6 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:05,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:05,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 79 [2023-11-29 05:27:05,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:08,611 INFO L124 PetriNetUnfolderBase]: 8623/14729 cut-off events. [2023-11-29 05:27:08,611 INFO L125 PetriNetUnfolderBase]: For 38202/38679 co-relation queries the response was YES. [2023-11-29 05:27:08,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50302 conditions, 14729 events. 8623/14729 cut-off events. For 38202/38679 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 106237 event pairs, 2715 based on Foata normal form. 1136/14664 useless extension candidates. Maximal degree in co-relation 50258. Up to 5361 conditions per place. [2023-11-29 05:27:08,784 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 148 selfloop transitions, 17 changer transitions 0/198 dead transitions. [2023-11-29 05:27:08,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 198 transitions, 1829 flow [2023-11-29 05:27:08,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:27:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 05:27:08,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 333 transitions. [2023-11-29 05:27:08,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7025316455696202 [2023-11-29 05:27:08,786 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 333 transitions. [2023-11-29 05:27:08,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 333 transitions. [2023-11-29 05:27:08,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:08,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 333 transitions. [2023-11-29 05:27:08,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 55.5) internal successors, (333), 6 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:08,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:08,788 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 79.0) internal successors, (553), 7 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:08,788 INFO L175 Difference]: Start difference. First operand has 146 places, 123 transitions, 915 flow. Second operand 6 states and 333 transitions. [2023-11-29 05:27:08,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 198 transitions, 1829 flow [2023-11-29 05:27:08,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 198 transitions, 1765 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 05:27:08,867 INFO L231 Difference]: Finished difference. Result has 144 places, 121 transitions, 895 flow [2023-11-29 05:27:08,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=861, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=895, PETRI_PLACES=144, PETRI_TRANSITIONS=121} [2023-11-29 05:27:08,868 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 66 predicate places. [2023-11-29 05:27:08,868 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 121 transitions, 895 flow [2023-11-29 05:27:08,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 48.0) internal successors, (288), 6 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:08,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:08,868 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:27:08,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:27:09,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:27:09,069 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:27:09,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:09,069 INFO L85 PathProgramCache]: Analyzing trace with hash 157076135, now seen corresponding path program 2 times [2023-11-29 05:27:09,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:27:09,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317189133] [2023-11-29 05:27:09,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:27:09,070 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 [2023-11-29 05:27:09,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:27:09,071 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:27:09,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:27:09,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:27:09,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:27:09,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:27:09,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:09,232 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 [2023-11-29 05:27:09,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:09,250 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 [2023-11-29 05:27:09,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:09,259 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 [2023-11-29 05:27:09,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:09,264 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 [2023-11-29 05:27:09,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:09,273 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 [2023-11-29 05:27:09,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:09,278 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 [2023-11-29 05:27:09,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:09,298 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 [2023-11-29 05:27:09,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:09,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:27:09,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:09,339 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 [2023-11-29 05:27:09,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:09,347 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 [2023-11-29 05:27:09,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:09,355 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 [2023-11-29 05:27:09,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:09,370 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 [2023-11-29 05:27:09,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:09,380 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 [2023-11-29 05:27:09,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:09,385 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 [2023-11-29 05:27:09,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:09,394 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 [2023-11-29 05:27:09,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:09,410 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 [2023-11-29 05:27:09,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:09,418 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 [2023-11-29 05:27:09,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:09,423 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 [2023-11-29 05:27:09,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:09,431 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 [2023-11-29 05:27:09,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:09,436 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 [2023-11-29 05:27:09,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:09,444 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 [2023-11-29 05:27:09,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:09,456 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 [2023-11-29 05:27:09,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:09,464 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 [2023-11-29 05:27:09,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:09,469 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 [2023-11-29 05:27:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:27:09,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:27:11,019 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:27:11,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [317189133] [2023-11-29 05:27:11,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [317189133] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:11,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:27:11,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 13 [2023-11-29 05:27:11,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27097270] [2023-11-29 05:27:11,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:11,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:27:11,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:27:11,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:27:11,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:27:16,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2023-11-29 05:27:16,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 121 transitions, 895 flow. Second operand has 15 states, 15 states have (on average 46.733333333333334) internal successors, (701), 15 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:16,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:16,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2023-11-29 05:27:16,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:24,353 INFO L124 PetriNetUnfolderBase]: 15752/24678 cut-off events. [2023-11-29 05:27:24,353 INFO L125 PetriNetUnfolderBase]: For 60919/62618 co-relation queries the response was YES. [2023-11-29 05:27:24,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89827 conditions, 24678 events. 15752/24678 cut-off events. For 60919/62618 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 169222 event pairs, 2520 based on Foata normal form. 704/24047 useless extension candidates. Maximal degree in co-relation 89783. Up to 5587 conditions per place. [2023-11-29 05:27:24,621 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 303 selfloop transitions, 40 changer transitions 0/369 dead transitions. [2023-11-29 05:27:24,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 369 transitions, 2888 flow [2023-11-29 05:27:24,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:27:24,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 05:27:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 903 transitions. [2023-11-29 05:27:24,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7620253164556962 [2023-11-29 05:27:24,623 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 903 transitions. [2023-11-29 05:27:24,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 903 transitions. [2023-11-29 05:27:24,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:24,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 903 transitions. [2023-11-29 05:27:24,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 60.2) internal successors, (903), 15 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:24,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 79.0) internal successors, (1264), 16 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:24,626 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 79.0) internal successors, (1264), 16 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:24,627 INFO L175 Difference]: Start difference. First operand has 144 places, 121 transitions, 895 flow. Second operand 15 states and 903 transitions. [2023-11-29 05:27:24,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 369 transitions, 2888 flow [2023-11-29 05:27:24,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 369 transitions, 2754 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 05:27:24,850 INFO L231 Difference]: Finished difference. Result has 160 places, 133 transitions, 1088 flow [2023-11-29 05:27:24,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=861, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1088, PETRI_PLACES=160, PETRI_TRANSITIONS=133} [2023-11-29 05:27:24,851 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 82 predicate places. [2023-11-29 05:27:24,851 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 133 transitions, 1088 flow [2023-11-29 05:27:24,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 46.733333333333334) internal successors, (701), 15 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:24,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:24,851 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:27:24,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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)] Forceful destruction successful, exit code 0 [2023-11-29 05:27:25,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:27:25,052 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:27:25,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:25,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1871274240, now seen corresponding path program 1 times [2023-11-29 05:27:25,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:27:25,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619238656] [2023-11-29 05:27:25,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:25,053 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 [2023-11-29 05:27:25,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:27:25,054 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:27:25,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:27:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:25,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:27:25,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:27:25,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:25,363 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 11 treesize of output 9 [2023-11-29 05:27:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:27:25,514 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:27:25,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619238656] [2023-11-29 05:27:25,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619238656] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:25,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:27:25,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-29 05:27:25,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660160955] [2023-11-29 05:27:25,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:25,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:27:25,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:27:25,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:27:25,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:27:27,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 79 [2023-11-29 05:27:27,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 133 transitions, 1088 flow. Second operand has 12 states, 12 states have (on average 45.333333333333336) internal successors, (544), 12 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:27,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:27,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 79 [2023-11-29 05:27:27,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:39,269 INFO L124 PetriNetUnfolderBase]: 46551/68755 cut-off events. [2023-11-29 05:27:39,269 INFO L125 PetriNetUnfolderBase]: For 244805/245943 co-relation queries the response was YES. [2023-11-29 05:27:39,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263204 conditions, 68755 events. 46551/68755 cut-off events. For 244805/245943 co-relation queries the response was YES. Maximal size of possible extension queue 1341. Compared 480187 event pairs, 5948 based on Foata normal form. 1533/68210 useless extension candidates. Maximal degree in co-relation 263153. Up to 15097 conditions per place. [2023-11-29 05:27:40,110 INFO L140 encePairwiseOnDemand]: 67/79 looper letters, 592 selfloop transitions, 56 changer transitions 0/668 dead transitions. [2023-11-29 05:27:40,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 668 transitions, 7043 flow [2023-11-29 05:27:40,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:27:40,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-29 05:27:40,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 771 transitions. [2023-11-29 05:27:40,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.750730282375852 [2023-11-29 05:27:40,113 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 771 transitions. [2023-11-29 05:27:40,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 771 transitions. [2023-11-29 05:27:40,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:40,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 771 transitions. [2023-11-29 05:27:40,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 59.30769230769231) internal successors, (771), 13 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:40,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 79.0) internal successors, (1106), 14 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:40,115 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 79.0) internal successors, (1106), 14 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:40,116 INFO L175 Difference]: Start difference. First operand has 160 places, 133 transitions, 1088 flow. Second operand 13 states and 771 transitions. [2023-11-29 05:27:40,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 668 transitions, 7043 flow [2023-11-29 05:27:41,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 668 transitions, 6673 flow, removed 100 selfloop flow, removed 5 redundant places. [2023-11-29 05:27:41,514 INFO L231 Difference]: Finished difference. Result has 173 places, 170 transitions, 1536 flow [2023-11-29 05:27:41,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=1040, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1536, PETRI_PLACES=173, PETRI_TRANSITIONS=170} [2023-11-29 05:27:41,515 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 95 predicate places. [2023-11-29 05:27:41,515 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 170 transitions, 1536 flow [2023-11-29 05:27:41,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 45.333333333333336) internal successors, (544), 12 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:41,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:27:41,515 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:27:41,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:27:41,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:27:41,716 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:27:41,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:27:41,716 INFO L85 PathProgramCache]: Analyzing trace with hash -2120040242, now seen corresponding path program 1 times [2023-11-29 05:27:41,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:27:41,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704026306] [2023-11-29 05:27:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:27:41,717 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 05:27:41,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:27:41,717 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:27:41,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:27:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:27:41,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:27:41,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:27:41,819 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 [2023-11-29 05:27:41,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:41,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:27:41,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:41,859 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 [2023-11-29 05:27:41,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:41,866 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 [2023-11-29 05:27:41,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:41,875 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 [2023-11-29 05:27:41,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:41,889 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 [2023-11-29 05:27:41,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:41,899 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 [2023-11-29 05:27:41,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:41,915 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 [2023-11-29 05:27:41,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:41,924 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 [2023-11-29 05:27:41,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:41,929 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 [2023-11-29 05:27:41,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:41,938 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 [2023-11-29 05:27:41,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:41,943 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 [2023-11-29 05:27:41,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:41,953 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 [2023-11-29 05:27:41,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:41,958 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 [2023-11-29 05:27:41,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:41,974 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 [2023-11-29 05:27:41,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:41,982 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 [2023-11-29 05:27:41,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:41,990 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 [2023-11-29 05:27:41,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:41,995 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 [2023-11-29 05:27:42,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:42,005 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 [2023-11-29 05:27:42,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:42,011 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 [2023-11-29 05:27:42,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:42,019 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 [2023-11-29 05:27:42,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:42,035 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 [2023-11-29 05:27:42,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:42,043 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 [2023-11-29 05:27:42,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:27:42,048 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 [2023-11-29 05:27:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:42,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:27:43,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:27:43,043 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:27:43,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704026306] [2023-11-29 05:27:43,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704026306] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:27:43,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:27:43,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2023-11-29 05:27:43,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342893586] [2023-11-29 05:27:43,044 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:27:43,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:27:43,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:27:43,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:27:43,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:27:48,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2023-11-29 05:27:48,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 170 transitions, 1536 flow. Second operand has 12 states, 12 states have (on average 47.5) internal successors, (570), 12 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:48,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:27:48,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2023-11-29 05:27:48,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:27:58,003 INFO L124 PetriNetUnfolderBase]: 36272/56919 cut-off events. [2023-11-29 05:27:58,003 INFO L125 PetriNetUnfolderBase]: For 225954/227595 co-relation queries the response was YES. [2023-11-29 05:27:58,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234572 conditions, 56919 events. 36272/56919 cut-off events. For 225954/227595 co-relation queries the response was YES. Maximal size of possible extension queue 1330. Compared 427203 event pairs, 19202 based on Foata normal form. 358/54745 useless extension candidates. Maximal degree in co-relation 234516. Up to 39749 conditions per place. [2023-11-29 05:27:58,804 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 155 selfloop transitions, 35 changer transitions 8/238 dead transitions. [2023-11-29 05:27:58,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 238 transitions, 2425 flow [2023-11-29 05:27:58,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:27:58,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 05:27:58,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 441 transitions. [2023-11-29 05:27:58,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6977848101265823 [2023-11-29 05:27:58,805 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 441 transitions. [2023-11-29 05:27:58,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 441 transitions. [2023-11-29 05:27:58,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:27:58,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 441 transitions. [2023-11-29 05:27:58,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 55.125) internal successors, (441), 8 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:58,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:58,807 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 79.0) internal successors, (711), 9 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:27:58,807 INFO L175 Difference]: Start difference. First operand has 173 places, 170 transitions, 1536 flow. Second operand 8 states and 441 transitions. [2023-11-29 05:27:58,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 238 transitions, 2425 flow [2023-11-29 05:28:01,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 238 transitions, 2369 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-11-29 05:28:01,893 INFO L231 Difference]: Finished difference. Result has 177 places, 171 transitions, 1575 flow [2023-11-29 05:28:01,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=1486, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1575, PETRI_PLACES=177, PETRI_TRANSITIONS=171} [2023-11-29 05:28:01,894 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 99 predicate places. [2023-11-29 05:28:01,894 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 171 transitions, 1575 flow [2023-11-29 05:28:01,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 47.5) internal successors, (570), 12 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:01,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:01,895 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:01,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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)] Ended with exit code 0 [2023-11-29 05:28:02,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:28:02,095 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:28:02,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:02,096 INFO L85 PathProgramCache]: Analyzing trace with hash 627330784, now seen corresponding path program 1 times [2023-11-29 05:28:02,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:28:02,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258987680] [2023-11-29 05:28:02,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:02,097 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 [2023-11-29 05:28:02,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:28:02,099 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:28:02,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:28:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:02,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:28:02,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:28:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:28:02,217 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:28:02,217 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:28:02,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258987680] [2023-11-29 05:28:02,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258987680] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:02,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:02,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:28:02,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754301027] [2023-11-29 05:28:02,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:02,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:28:02,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:28:02,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:28:02,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:28:02,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 79 [2023-11-29 05:28:02,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 171 transitions, 1575 flow. Second operand has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:02,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:02,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 79 [2023-11-29 05:28:02,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:12,194 INFO L124 PetriNetUnfolderBase]: 41418/61846 cut-off events. [2023-11-29 05:28:12,194 INFO L125 PetriNetUnfolderBase]: For 225956/229388 co-relation queries the response was YES. [2023-11-29 05:28:12,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247342 conditions, 61846 events. 41418/61846 cut-off events. For 225956/229388 co-relation queries the response was YES. Maximal size of possible extension queue 1234. Compared 424169 event pairs, 17135 based on Foata normal form. 1924/60778 useless extension candidates. Maximal degree in co-relation 247284. Up to 33791 conditions per place. [2023-11-29 05:28:13,103 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 207 selfloop transitions, 22 changer transitions 0/271 dead transitions. [2023-11-29 05:28:13,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 271 transitions, 2663 flow [2023-11-29 05:28:13,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:28:13,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:28:13,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 316 transitions. [2023-11-29 05:28:13,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8 [2023-11-29 05:28:13,105 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 316 transitions. [2023-11-29 05:28:13,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 316 transitions. [2023-11-29 05:28:13,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:13,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 316 transitions. [2023-11-29 05:28:13,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.2) internal successors, (316), 5 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:13,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:13,106 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:13,106 INFO L175 Difference]: Start difference. First operand has 177 places, 171 transitions, 1575 flow. Second operand 5 states and 316 transitions. [2023-11-29 05:28:13,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 271 transitions, 2663 flow [2023-11-29 05:28:15,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 271 transitions, 2564 flow, removed 9 selfloop flow, removed 8 redundant places. [2023-11-29 05:28:15,301 INFO L231 Difference]: Finished difference. Result has 175 places, 168 transitions, 1516 flow [2023-11-29 05:28:15,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=1404, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1516, PETRI_PLACES=175, PETRI_TRANSITIONS=168} [2023-11-29 05:28:15,302 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 97 predicate places. [2023-11-29 05:28:15,302 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 168 transitions, 1516 flow [2023-11-29 05:28:15,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:15,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:15,302 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:15,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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)] Ended with exit code 0 [2023-11-29 05:28:15,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:28:15,503 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:28:15,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:15,503 INFO L85 PathProgramCache]: Analyzing trace with hash -697065791, now seen corresponding path program 2 times [2023-11-29 05:28:15,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:28:15,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479483123] [2023-11-29 05:28:15,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:28:15,504 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 [2023-11-29 05:28:15,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:28:15,504 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:28:15,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 (28)] Waiting until timeout for monitored process [2023-11-29 05:28:15,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:28:15,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:28:15,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:28:15,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:28:15,648 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 [2023-11-29 05:28:15,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:15,659 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 [2023-11-29 05:28:15,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:15,676 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 [2023-11-29 05:28:15,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:15,684 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 [2023-11-29 05:28:15,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:15,701 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 [2023-11-29 05:28:15,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:15,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:28:15,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:15,744 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 [2023-11-29 05:28:15,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:15,752 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 [2023-11-29 05:28:15,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:15,761 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 [2023-11-29 05:28:15,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:15,766 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 [2023-11-29 05:28:15,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:15,772 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 [2023-11-29 05:28:15,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:15,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:28:15,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:15,797 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 [2023-11-29 05:28:15,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:15,805 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 [2023-11-29 05:28:15,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:15,811 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 [2023-11-29 05:28:15,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:15,819 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 [2023-11-29 05:28:15,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:15,827 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 [2023-11-29 05:28:15,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:15,832 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 [2023-11-29 05:28:15,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:15,839 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 [2023-11-29 05:28:15,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:15,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:28:15,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:15,853 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 [2023-11-29 05:28:15,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:15,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:28:15,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:15,870 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 [2023-11-29 05:28:15,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:15,885 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 [2023-11-29 05:28:16,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:28:16,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:28:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:28:17,265 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:28:17,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [479483123] [2023-11-29 05:28:17,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [479483123] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:28:17,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:28:17,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2023-11-29 05:28:17,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146579909] [2023-11-29 05:28:17,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:28:17,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 05:28:17,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:28:17,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 05:28:17,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:28:22,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 79 [2023-11-29 05:28:22,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 168 transitions, 1516 flow. Second operand has 13 states, 13 states have (on average 47.30769230769231) internal successors, (615), 13 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:22,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:22,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 79 [2023-11-29 05:28:22,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:36,127 INFO L124 PetriNetUnfolderBase]: 46991/71308 cut-off events. [2023-11-29 05:28:36,127 INFO L125 PetriNetUnfolderBase]: For 296207/297817 co-relation queries the response was YES. [2023-11-29 05:28:36,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286487 conditions, 71308 events. 46991/71308 cut-off events. For 296207/297817 co-relation queries the response was YES. Maximal size of possible extension queue 1368. Compared 512839 event pairs, 7168 based on Foata normal form. 1743/70142 useless extension candidates. Maximal degree in co-relation 286429. Up to 17101 conditions per place. [2023-11-29 05:28:37,120 INFO L140 encePairwiseOnDemand]: 69/79 looper letters, 603 selfloop transitions, 46 changer transitions 4/687 dead transitions. [2023-11-29 05:28:37,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 687 transitions, 7209 flow [2023-11-29 05:28:37,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 05:28:37,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 05:28:37,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 888 transitions. [2023-11-29 05:28:37,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7493670886075949 [2023-11-29 05:28:37,123 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 888 transitions. [2023-11-29 05:28:37,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 888 transitions. [2023-11-29 05:28:37,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:37,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 888 transitions. [2023-11-29 05:28:37,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 59.2) internal successors, (888), 15 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:37,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 79.0) internal successors, (1264), 16 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:37,126 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 79.0) internal successors, (1264), 16 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:37,126 INFO L175 Difference]: Start difference. First operand has 175 places, 168 transitions, 1516 flow. Second operand 15 states and 888 transitions. [2023-11-29 05:28:37,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 687 transitions, 7209 flow [2023-11-29 05:28:40,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 687 transitions, 6963 flow, removed 25 selfloop flow, removed 2 redundant places. [2023-11-29 05:28:40,012 INFO L231 Difference]: Finished difference. Result has 191 places, 185 transitions, 1791 flow [2023-11-29 05:28:40,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1791, PETRI_PLACES=191, PETRI_TRANSITIONS=185} [2023-11-29 05:28:40,012 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 113 predicate places. [2023-11-29 05:28:40,012 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 185 transitions, 1791 flow [2023-11-29 05:28:40,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 47.30769230769231) internal successors, (615), 13 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:40,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:40,013 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:28:40,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 (28)] Ended with exit code 0 [2023-11-29 05:28:40,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:28:40,213 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:28:40,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:40,214 INFO L85 PathProgramCache]: Analyzing trace with hash 135693818, now seen corresponding path program 1 times [2023-11-29 05:28:40,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:28:40,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083169998] [2023-11-29 05:28:40,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:28:40,214 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 [2023-11-29 05:28:40,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:28:40,215 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:28:40,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 (29)] Waiting until timeout for monitored process [2023-11-29 05:28:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:28:40,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:28:40,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:28:40,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 05:28:40,325 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:28:40,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:28:40,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083169998] [2023-11-29 05:28:40,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083169998] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:28:40,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:28:40,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:28:40,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257494440] [2023-11-29 05:28:40,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:28:40,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:28:40,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:28:40,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:28:40,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:28:40,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 79 [2023-11-29 05:28:40,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 185 transitions, 1791 flow. Second operand has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:40,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:28:40,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 79 [2023-11-29 05:28:40,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:28:52,944 INFO L124 PetriNetUnfolderBase]: 53159/77837 cut-off events. [2023-11-29 05:28:52,944 INFO L125 PetriNetUnfolderBase]: For 361966/365787 co-relation queries the response was YES. [2023-11-29 05:28:53,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329080 conditions, 77837 events. 53159/77837 cut-off events. For 361966/365787 co-relation queries the response was YES. Maximal size of possible extension queue 1294. Compared 523307 event pairs, 22518 based on Foata normal form. 2042/76024 useless extension candidates. Maximal degree in co-relation 329018. Up to 43401 conditions per place. [2023-11-29 05:28:54,181 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 252 selfloop transitions, 22 changer transitions 0/316 dead transitions. [2023-11-29 05:28:54,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 316 transitions, 3317 flow [2023-11-29 05:28:54,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:28:54,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:28:54,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 312 transitions. [2023-11-29 05:28:54,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.789873417721519 [2023-11-29 05:28:54,183 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 312 transitions. [2023-11-29 05:28:54,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 312 transitions. [2023-11-29 05:28:54,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:28:54,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 312 transitions. [2023-11-29 05:28:54,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 62.4) internal successors, (312), 5 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) [2023-11-29 05:28:54,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:54,184 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:54,184 INFO L175 Difference]: Start difference. First operand has 191 places, 185 transitions, 1791 flow. Second operand 5 states and 312 transitions. [2023-11-29 05:28:54,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 316 transitions, 3317 flow [2023-11-29 05:28:58,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 316 transitions, 3213 flow, removed 25 selfloop flow, removed 10 redundant places. [2023-11-29 05:28:58,831 INFO L231 Difference]: Finished difference. Result has 187 places, 181 transitions, 1700 flow [2023-11-29 05:28:58,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=1588, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1700, PETRI_PLACES=187, PETRI_TRANSITIONS=181} [2023-11-29 05:28:58,832 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 109 predicate places. [2023-11-29 05:28:58,832 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 181 transitions, 1700 flow [2023-11-29 05:28:58,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:28:58,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:28:58,832 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2023-11-29 05:28:58,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 (29)] Ended with exit code 0 [2023-11-29 05:28:59,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:28:59,033 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:28:59,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:28:59,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1949031522, now seen corresponding path program 3 times [2023-11-29 05:28:59,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:28:59,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146557239] [2023-11-29 05:28:59,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:28:59,034 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 [2023-11-29 05:28:59,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:28:59,035 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:28:59,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 (30)] Waiting until timeout for monitored process [2023-11-29 05:28:59,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 05:28:59,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:28:59,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 05:28:59,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:28:59,324 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 [2023-11-29 05:28:59,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:59,333 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 [2023-11-29 05:28:59,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:59,347 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 [2023-11-29 05:28:59,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:59,353 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 [2023-11-29 05:28:59,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:59,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:28:59,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:59,366 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 [2023-11-29 05:28:59,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:59,381 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 [2023-11-29 05:28:59,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:59,387 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 [2023-11-29 05:28:59,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:59,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:28:59,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:59,424 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 [2023-11-29 05:28:59,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:59,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:28:59,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:59,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 05:28:59,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:59,457 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 [2023-11-29 05:28:59,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:59,471 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 [2023-11-29 05:28:59,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:59,480 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 [2023-11-29 05:28:59,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:59,485 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 [2023-11-29 05:28:59,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:59,491 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 [2023-11-29 05:28:59,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:59,499 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 [2023-11-29 05:28:59,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:59,506 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 [2023-11-29 05:28:59,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:59,514 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 [2023-11-29 05:28:59,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:59,520 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 [2023-11-29 05:28:59,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:59,528 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 [2023-11-29 05:28:59,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:59,544 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 [2023-11-29 05:28:59,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:28:59,552 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 [2023-11-29 05:29:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:00,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:29:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:29:02,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:29:02,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146557239] [2023-11-29 05:29:02,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146557239] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:29:02,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:29:02,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-11-29 05:29:02,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002058628] [2023-11-29 05:29:02,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:29:02,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 05:29:02,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:29:02,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 05:29:02,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2023-11-29 05:29:17,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 79 [2023-11-29 05:29:17,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 181 transitions, 1700 flow. Second operand has 26 states, 26 states have (on average 48.76923076923077) internal successors, (1268), 26 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:29:17,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:29:17,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 79 [2023-11-29 05:29:17,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:29:55,742 INFO L124 PetriNetUnfolderBase]: 37520/60374 cut-off events. [2023-11-29 05:29:55,742 INFO L125 PetriNetUnfolderBase]: For 274240/276272 co-relation queries the response was YES. [2023-11-29 05:29:56,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253910 conditions, 60374 events. 37520/60374 cut-off events. For 274240/276272 co-relation queries the response was YES. Maximal size of possible extension queue 1159. Compared 458876 event pairs, 23455 based on Foata normal form. 486/57986 useless extension candidates. Maximal degree in co-relation 253851. Up to 47939 conditions per place. [2023-11-29 05:29:56,748 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 106 selfloop transitions, 66 changer transitions 0/217 dead transitions. [2023-11-29 05:29:56,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 217 transitions, 2584 flow [2023-11-29 05:29:56,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 05:29:56,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-29 05:29:56,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2269 transitions. [2023-11-29 05:29:56,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6243808475509081 [2023-11-29 05:29:56,752 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2269 transitions. [2023-11-29 05:29:56,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2269 transitions. [2023-11-29 05:29:56,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:29:56,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2269 transitions. [2023-11-29 05:29:56,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 49.32608695652174) internal successors, (2269), 46 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:29:56,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 79.0) internal successors, (3713), 47 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:29:56,758 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 79.0) internal successors, (3713), 47 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:29:56,758 INFO L175 Difference]: Start difference. First operand has 187 places, 181 transitions, 1700 flow. Second operand 46 states and 2269 transitions. [2023-11-29 05:29:56,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 217 transitions, 2584 flow [2023-11-29 05:30:02,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 217 transitions, 2539 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-29 05:30:02,647 INFO L231 Difference]: Finished difference. Result has 242 places, 217 transitions, 2381 flow [2023-11-29 05:30:02,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=1667, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=2381, PETRI_PLACES=242, PETRI_TRANSITIONS=217} [2023-11-29 05:30:02,648 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 164 predicate places. [2023-11-29 05:30:02,648 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 217 transitions, 2381 flow [2023-11-29 05:30:02,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 48.76923076923077) internal successors, (1268), 26 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:02,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:30:02,649 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, 1, 1, 1] [2023-11-29 05:30:02,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 (30)] Forceful destruction successful, exit code 0 [2023-11-29 05:30:02,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:30:02,849 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:30:02,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:30:02,849 INFO L85 PathProgramCache]: Analyzing trace with hash 46934560, now seen corresponding path program 1 times [2023-11-29 05:30:02,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:30:02,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015802252] [2023-11-29 05:30:02,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:30:02,850 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 [2023-11-29 05:30:02,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:30:02,851 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:30:02,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 (31)] Waiting until timeout for monitored process [2023-11-29 05:30:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:30:02,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:30:02,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:30:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:30:03,069 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:30:03,069 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:30:03,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015802252] [2023-11-29 05:30:03,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015802252] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:30:03,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:30:03,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:30:03,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603996847] [2023-11-29 05:30:03,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:30:03,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:30:03,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:30:03,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:30:03,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:30:03,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 79 [2023-11-29 05:30:03,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 217 transitions, 2381 flow. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:03,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:30:03,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 79 [2023-11-29 05:30:03,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:30:13,237 INFO L124 PetriNetUnfolderBase]: 38505/62024 cut-off events. [2023-11-29 05:30:13,237 INFO L125 PetriNetUnfolderBase]: For 254453/256535 co-relation queries the response was YES. [2023-11-29 05:30:13,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258113 conditions, 62024 events. 38505/62024 cut-off events. For 254453/256535 co-relation queries the response was YES. Maximal size of possible extension queue 1148. Compared 472929 event pairs, 8485 based on Foata normal form. 525/59816 useless extension candidates. Maximal degree in co-relation 258042. Up to 47179 conditions per place. [2023-11-29 05:30:14,389 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 169 selfloop transitions, 24 changer transitions 8/247 dead transitions. [2023-11-29 05:30:14,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 247 transitions, 2984 flow [2023-11-29 05:30:14,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:30:14,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 05:30:14,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2023-11-29 05:30:14,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8312236286919831 [2023-11-29 05:30:14,391 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2023-11-29 05:30:14,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2023-11-29 05:30:14,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:30:14,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2023-11-29 05:30:14,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:14,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:14,392 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:14,392 INFO L175 Difference]: Start difference. First operand has 242 places, 217 transitions, 2381 flow. Second operand 3 states and 197 transitions. [2023-11-29 05:30:14,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 247 transitions, 2984 flow [2023-11-29 05:30:17,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 247 transitions, 2828 flow, removed 51 selfloop flow, removed 19 redundant places. [2023-11-29 05:30:17,950 INFO L231 Difference]: Finished difference. Result has 226 places, 213 transitions, 2225 flow [2023-11-29 05:30:17,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=2225, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2225, PETRI_PLACES=226, PETRI_TRANSITIONS=213} [2023-11-29 05:30:17,951 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 148 predicate places. [2023-11-29 05:30:17,951 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 213 transitions, 2225 flow [2023-11-29 05:30:17,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:30:17,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:30:17,951 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 05:30:17,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 (31)] Ended with exit code 0 [2023-11-29 05:30:18,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:30:18,152 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:30:18,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:30:18,152 INFO L85 PathProgramCache]: Analyzing trace with hash -776176291, now seen corresponding path program 3 times [2023-11-29 05:30:18,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:30:18,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527106357] [2023-11-29 05:30:18,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:30:18,153 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 [2023-11-29 05:30:18,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:30:18,154 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:30:18,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 (32)] Waiting until timeout for monitored process [2023-11-29 05:30:18,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 05:30:18,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:30:18,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 05:30:18,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:30:18,341 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 [2023-11-29 05:30:18,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:30:18,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:30:18,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:30:18,380 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 [2023-11-29 05:30:18,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:30:18,395 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 [2023-11-29 05:30:18,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:30:18,412 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 [2023-11-29 05:30:18,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:30:18,421 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 [2023-11-29 05:30:18,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:30:18,428 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 [2023-11-29 05:30:18,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:30:18,437 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 [2023-11-29 05:30:18,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:30:18,448 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 [2023-11-29 05:30:18,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:30:18,454 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 [2023-11-29 05:30:18,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:30:18,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:30:18,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:30:18,483 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 [2023-11-29 05:30:18,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:30:18,493 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 [2023-11-29 05:30:18,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:30:18,499 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 [2023-11-29 05:30:18,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:30:18,508 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 [2023-11-29 05:30:18,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:30:18,514 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 [2023-11-29 05:30:18,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:30:18,531 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 [2023-11-29 05:30:18,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:30:18,539 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 [2023-11-29 05:30:18,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:30:18,546 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 [2023-11-29 05:30:18,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:30:18,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:30:18,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:30:18,563 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 [2023-11-29 05:30:18,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:30:18,569 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 [2023-11-29 05:30:18,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:30:18,578 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 [2023-11-29 05:30:18,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:30:18,594 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 [2023-11-29 05:30:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 05:30:19,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:30:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-29 05:30:31,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:30:31,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527106357] [2023-11-29 05:30:31,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527106357] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:30:31,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:30:31,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2023-11-29 05:30:31,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289639292] [2023-11-29 05:30:31,843 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:30:31,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 05:30:31,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:30:31,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 05:30:31,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=249, Unknown=2, NotChecked=0, Total=306 [2023-11-29 05:30:36,755 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, 1] [2023-11-29 05:30:45,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 05:30:51,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 05:30:57,121 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, 1] [2023-11-29 05:31:14,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 79 [2023-11-29 05:31:14,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 213 transitions, 2225 flow. Second operand has 18 states, 18 states have (on average 42.44444444444444) internal successors, (764), 18 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:31:14,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:31:14,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 79 [2023-11-29 05:31:14,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:31:43,668 INFO L124 PetriNetUnfolderBase]: 75789/112783 cut-off events. [2023-11-29 05:31:43,668 INFO L125 PetriNetUnfolderBase]: For 439093/439469 co-relation queries the response was YES. [2023-11-29 05:31:45,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479570 conditions, 112783 events. 75789/112783 cut-off events. For 439093/439469 co-relation queries the response was YES. Maximal size of possible extension queue 1850. Compared 829186 event pairs, 33206 based on Foata normal form. 728/109399 useless extension candidates. Maximal degree in co-relation 479499. Up to 54562 conditions per place. [2023-11-29 05:31:45,653 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 535 selfloop transitions, 73 changer transitions 0/628 dead transitions. [2023-11-29 05:31:45,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 628 transitions, 6738 flow [2023-11-29 05:31:45,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 05:31:45,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 05:31:45,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 746 transitions. [2023-11-29 05:31:45,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.674502712477396 [2023-11-29 05:31:45,658 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 746 transitions. [2023-11-29 05:31:45,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 746 transitions. [2023-11-29 05:31:45,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:31:45,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 746 transitions. [2023-11-29 05:31:45,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 53.285714285714285) internal successors, (746), 14 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:31:45,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:31:45,661 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 79.0) internal successors, (1185), 15 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:31:45,661 INFO L175 Difference]: Start difference. First operand has 226 places, 213 transitions, 2225 flow. Second operand 14 states and 746 transitions. [2023-11-29 05:31:45,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 628 transitions, 6738 flow [2023-11-29 05:31:53,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 628 transitions, 6599 flow, removed 54 selfloop flow, removed 7 redundant places. [2023-11-29 05:31:53,995 INFO L231 Difference]: Finished difference. Result has 232 places, 226 transitions, 2559 flow [2023-11-29 05:31:53,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=2183, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2559, PETRI_PLACES=232, PETRI_TRANSITIONS=226} [2023-11-29 05:31:53,996 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 154 predicate places. [2023-11-29 05:31:53,996 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 226 transitions, 2559 flow [2023-11-29 05:31:53,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 42.44444444444444) internal successors, (764), 18 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:31:53,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:31:53,996 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, 1, 1, 1, 1, 1, 1] [2023-11-29 05:31:53,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 (32)] Ended with exit code 0 [2023-11-29 05:31:54,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:31:54,197 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:31:54,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:31:54,197 INFO L85 PathProgramCache]: Analyzing trace with hash 137025530, now seen corresponding path program 1 times [2023-11-29 05:31:54,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:31:54,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158024499] [2023-11-29 05:31:54,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:31:54,197 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 [2023-11-29 05:31:54,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:31:54,198 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:31:54,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 (33)] Waiting until timeout for monitored process [2023-11-29 05:31:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:31:54,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:31:54,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:31:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:31:54,480 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:31:54,480 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:31:54,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158024499] [2023-11-29 05:31:54,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1158024499] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:31:54,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:31:54,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:31:54,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487294058] [2023-11-29 05:31:54,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:31:54,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:31:54,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:31:54,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:31:54,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:31:54,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 79 [2023-11-29 05:31:54,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 226 transitions, 2559 flow. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:31:54,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:31:54,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 79 [2023-11-29 05:31:54,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 05:32:25,340 INFO L124 PetriNetUnfolderBase]: 113815/168338 cut-off events. [2023-11-29 05:32:25,340 INFO L125 PetriNetUnfolderBase]: For 952075/959202 co-relation queries the response was YES. [2023-11-29 05:32:27,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 716215 conditions, 168338 events. 113815/168338 cut-off events. For 952075/959202 co-relation queries the response was YES. Maximal size of possible extension queue 2969. Compared 1307416 event pairs, 27765 based on Foata normal form. 2009/159173 useless extension candidates. Maximal degree in co-relation 716143. Up to 58200 conditions per place. [2023-11-29 05:32:28,465 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 441 selfloop transitions, 33 changer transitions 0/518 dead transitions. [2023-11-29 05:32:28,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 518 transitions, 6471 flow [2023-11-29 05:32:28,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:32:28,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 05:32:28,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 308 transitions. [2023-11-29 05:32:28,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.779746835443038 [2023-11-29 05:32:28,466 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 308 transitions. [2023-11-29 05:32:28,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 308 transitions. [2023-11-29 05:32:28,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 05:32:28,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 308 transitions. [2023-11-29 05:32:28,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:32:28,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:32:28,468 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 79.0) internal successors, (474), 6 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:32:28,468 INFO L175 Difference]: Start difference. First operand has 232 places, 226 transitions, 2559 flow. Second operand 5 states and 308 transitions. [2023-11-29 05:32:28,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 518 transitions, 6471 flow [2023-11-29 05:32:38,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 518 transitions, 6288 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-11-29 05:32:38,491 INFO L231 Difference]: Finished difference. Result has 233 places, 233 transitions, 2612 flow [2023-11-29 05:32:38,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=2441, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2612, PETRI_PLACES=233, PETRI_TRANSITIONS=233} [2023-11-29 05:32:38,492 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 155 predicate places. [2023-11-29 05:32:38,492 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 233 transitions, 2612 flow [2023-11-29 05:32:38,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:32:38,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 05:32:38,492 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-11-29 05:32:38,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 (33)] Ended with exit code 0 [2023-11-29 05:32:38,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 [2023-11-29 05:32:38,693 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 05:32:38,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:32:38,693 INFO L85 PathProgramCache]: Analyzing trace with hash 814511632, now seen corresponding path program 4 times [2023-11-29 05:32:38,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 05:32:38,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1492091699] [2023-11-29 05:32:38,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:32:38,693 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 [2023-11-29 05:32:38,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 05:32:38,694 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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) [2023-11-29 05:32:38,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c635f9f-af1a-494c-b7aa-0f6dc23788b2/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 (34)] Waiting until timeout for monitored process [2023-11-29 05:32:38,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:32:38,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:32:38,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 05:32:38,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:32:38,864 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 [2023-11-29 05:32:38,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:32:38,885 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 [2023-11-29 05:32:38,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:32:38,905 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 [2023-11-29 05:32:38,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:32:38,917 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 [2023-11-29 05:32:38,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:32:38,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:32:38,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:32:38,971 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 [2023-11-29 05:32:38,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:32:38,992 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 [2023-11-29 05:32:39,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:32:39,004 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 [2023-11-29 05:32:39,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:32:39,025 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 [2023-11-29 05:32:39,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:32:39,037 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 [2023-11-29 05:32:39,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:32:39,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:32:39,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:32:39,103 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 [2023-11-29 05:32:39,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:32:39,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:32:39,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:32:39,145 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 [2023-11-29 05:32:39,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:32:39,171 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 [2023-11-29 05:32:39,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:32:39,185 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 [2023-11-29 05:32:39,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:32:39,228 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 [2023-11-29 05:32:39,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:32:39,247 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 [2023-11-29 05:32:39,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:32:39,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 05:32:39,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:32:39,301 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 [2023-11-29 05:32:39,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:32:39,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-29 05:32:39,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:32:39,393 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 [2023-11-29 05:32:39,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:32:39,428 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 [2023-11-29 05:32:39,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:32:39,447 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 [2023-11-29 05:32:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 05:32:40,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:32:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:32:44,467 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 05:32:44,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1492091699] [2023-11-29 05:32:44,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1492091699] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:32:44,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:32:44,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 20 [2023-11-29 05:32:44,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544832928] [2023-11-29 05:32:44,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:32:44,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:32:44,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 05:32:44,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:32:44,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:33:15,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 79 [2023-11-29 05:33:15,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 233 transitions, 2612 flow. Second operand has 21 states, 21 states have (on average 46.61904761904762) internal successors, (979), 21 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:15,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 05:33:15,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 79 [2023-11-29 05:33:15,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand