./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 25cf9c0a16564c460f6e824f90a2df4185d2e5d2c682a221258efaf06dec8ca4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:51:50,805 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:51:50,867 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 06:51:50,870 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:51:50,871 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:51:50,892 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:51:50,893 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:51:50,893 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:51:50,894 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:51:50,895 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:51:50,895 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:51:50,896 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:51:50,897 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:51:50,897 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:51:50,898 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:51:50,898 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:51:50,899 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:51:50,899 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:51:50,900 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:51:50,900 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:51:50,901 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 06:51:50,901 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 06:51:50,902 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 06:51:50,902 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:51:50,903 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 06:51:50,903 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 06:51:50,904 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:51:50,904 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:51:50,905 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:51:50,905 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:51:50,905 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:51:50,906 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:51:50,906 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:51:50,906 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:51:50,906 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:51:50,907 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:51:50,907 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:51:50,907 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:51:50,907 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:51:50,907 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:51:50,907 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:51:50,908 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_3c43e682-f3d1-43d9-a753-1ed3034625ae/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25cf9c0a16564c460f6e824f90a2df4185d2e5d2c682a221258efaf06dec8ca4 [2023-11-29 06:51:51,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:51:51,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:51:51,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:51:51,160 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:51:51,160 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:51:51,162 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2023-11-29 06:51:53,915 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:51:54,079 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:51:54,080 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2023-11-29 06:51:54,088 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/data/d4ed6322d/7c4d3c6b9ad64927a67d4d0b60e41e28/FLAG46b31da61 [2023-11-29 06:51:54,100 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/data/d4ed6322d/7c4d3c6b9ad64927a67d4d0b60e41e28 [2023-11-29 06:51:54,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:51:54,103 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:51:54,104 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:51:54,105 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:51:54,110 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:51:54,111 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:51:54" (1/1) ... [2023-11-29 06:51:54,112 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@676d9a0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:54, skipping insertion in model container [2023-11-29 06:51:54,112 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:51:54" (1/1) ... [2023-11-29 06:51:54,138 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:51:54,320 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:51:54,332 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 06:51:54,333 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@71477aad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:54, skipping insertion in model container [2023-11-29 06:51:54,333 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:51:54,334 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-29 06:51:54,335 INFO L158 Benchmark]: Toolchain (without parser) took 231.45ms. Allocated memory is still 151.0MB. Free memory was 112.9MB in the beginning and 102.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 06:51:54,336 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 151.0MB. Free memory is still 124.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 06:51:54,337 INFO L158 Benchmark]: CACSL2BoogieTranslator took 229.07ms. Allocated memory is still 151.0MB. Free memory was 112.9MB in the beginning and 102.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-29 06:51:54,338 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 151.0MB. Free memory is still 124.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 229.07ms. Allocated memory is still 151.0MB. Free memory was 112.9MB in the beginning and 102.9MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 25cf9c0a16564c460f6e824f90a2df4185d2e5d2c682a221258efaf06dec8ca4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:51:56,046 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:51:56,115 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-29 06:51:56,126 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:51:56,127 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:51:56,154 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:51:56,155 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:51:56,155 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:51:56,156 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:51:56,157 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:51:56,157 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:51:56,158 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:51:56,159 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:51:56,159 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:51:56,160 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:51:56,161 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:51:56,161 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:51:56,162 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:51:56,162 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:51:56,163 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:51:56,164 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 06:51:56,164 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 06:51:56,165 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 06:51:56,165 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:51:56,166 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 06:51:56,166 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-29 06:51:56,167 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-29 06:51:56,167 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 06:51:56,167 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:51:56,168 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:51:56,168 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:51:56,169 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:51:56,169 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:51:56,169 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:51:56,170 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:51:56,170 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:51:56,170 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:51:56,170 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-29 06:51:56,171 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-29 06:51:56,171 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:51:56,171 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:51:56,171 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:51:56,171 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:51:56,172 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-29 06:51:56,172 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_3c43e682-f3d1-43d9-a753-1ed3034625ae/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25cf9c0a16564c460f6e824f90a2df4185d2e5d2c682a221258efaf06dec8ca4 [2023-11-29 06:51:56,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:51:56,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:51:56,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:51:56,476 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:51:56,476 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:51:56,477 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2023-11-29 06:51:59,262 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:51:59,446 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:51:59,446 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2023-11-29 06:51:59,455 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/data/9b6672bb9/6c267f5f182248c2af8e32678885a18d/FLAGbf45f6caf [2023-11-29 06:51:59,470 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/data/9b6672bb9/6c267f5f182248c2af8e32678885a18d [2023-11-29 06:51:59,473 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:51:59,474 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:51:59,476 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:51:59,476 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:51:59,481 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:51:59,482 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:51:59" (1/1) ... [2023-11-29 06:51:59,483 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@348f27af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:59, skipping insertion in model container [2023-11-29 06:51:59,483 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:51:59" (1/1) ... [2023-11-29 06:51:59,508 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:51:59,707 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:51:59,723 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-29 06:51:59,728 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:51:59,746 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:51:59,753 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:51:59,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:51:59,790 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:51:59,791 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-29 06:51:59,798 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:51:59,799 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:59 WrapperNode [2023-11-29 06:51:59,799 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:51:59,800 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:51:59,800 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:51:59,801 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:51:59,808 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:59" (1/1) ... [2023-11-29 06:51:59,819 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:59" (1/1) ... [2023-11-29 06:51:59,841 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 104 [2023-11-29 06:51:59,842 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:51:59,843 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:51:59,843 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:51:59,843 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:51:59,863 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:59" (1/1) ... [2023-11-29 06:51:59,864 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:59" (1/1) ... [2023-11-29 06:51:59,868 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:59" (1/1) ... [2023-11-29 06:51:59,886 INFO L175 MemorySlicer]: Split 15 memory accesses to 5 slices as follows [2, 2, 2, 2, 7]. 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 06:51:59,886 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:59" (1/1) ... [2023-11-29 06:51:59,887 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:59" (1/1) ... [2023-11-29 06:51:59,898 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:59" (1/1) ... [2023-11-29 06:51:59,902 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:59" (1/1) ... [2023-11-29 06:51:59,905 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:59" (1/1) ... [2023-11-29 06:51:59,907 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:59" (1/1) ... [2023-11-29 06:51:59,911 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:51:59,912 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:51:59,912 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:51:59,913 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:51:59,914 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:59" (1/1) ... [2023-11-29 06:51:59,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:51:59,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:51:59,946 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:51:59,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:51:59,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:51:59,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-29 06:51:59,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-29 06:51:59,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2023-11-29 06:51:59,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2023-11-29 06:51:59,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2023-11-29 06:51:59,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 06:51:59,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-29 06:51:59,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2023-11-29 06:51:59,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2023-11-29 06:51:59,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2023-11-29 06:51:59,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2023-11-29 06:51:59,979 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-29 06:51:59,979 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-29 06:51:59,979 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-29 06:51:59,979 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-29 06:51:59,979 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-29 06:51:59,980 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-29 06:51:59,980 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-29 06:51:59,980 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-29 06:51:59,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 06:51:59,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:51:59,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:51:59,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 06:51:59,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-29 06:51:59,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-29 06:51:59,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2023-11-29 06:51:59,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2023-11-29 06:51:59,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2023-11-29 06:51:59,983 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 06:52:00,108 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:52:00,110 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:52:00,609 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:52:00,896 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:52:00,896 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-29 06:52:00,897 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:52:00 BoogieIcfgContainer [2023-11-29 06:52:00,897 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:52:00,901 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:52:00,901 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:52:00,904 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:52:00,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:51:59" (1/3) ... [2023-11-29 06:52:00,905 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e291d79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:52:00, skipping insertion in model container [2023-11-29 06:52:00,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:51:59" (2/3) ... [2023-11-29 06:52:00,906 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e291d79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:52:00, skipping insertion in model container [2023-11-29 06:52:00,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:52:00" (3/3) ... [2023-11-29 06:52:00,907 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array-hom.wvr.c [2023-11-29 06:52:00,929 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:52:00,929 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-11-29 06:52:00,929 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 06:52:01,017 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 06:52:01,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 70 transitions, 161 flow [2023-11-29 06:52:01,089 INFO L124 PetriNetUnfolderBase]: 4/67 cut-off events. [2023-11-29 06:52:01,089 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-29 06:52:01,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 67 events. 4/67 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 162 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2023-11-29 06:52:01,094 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 70 transitions, 161 flow [2023-11-29 06:52:01,098 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 66 transitions, 150 flow [2023-11-29 06:52:01,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:52:01,116 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;@629e8d2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:52:01,117 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2023-11-29 06:52:01,120 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 06:52:01,121 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-29 06:52:01,121 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 06:52:01,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:52:01,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 06:52:01,122 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 06:52:01,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:01,127 INFO L85 PathProgramCache]: Analyzing trace with hash 504187, now seen corresponding path program 1 times [2023-11-29 06:52:01,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:52:01,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527530111] [2023-11-29 06:52:01,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:01,139 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 06:52:01,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:52:01,140 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:01,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:01,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:52:01,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:01,353 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 06:52:01,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:01,379 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 06:52:01,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:01,402 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 06:52:01,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:01,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:52:01,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:01,445 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 06:52:01,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:01,464 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 06:52:01,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:01,475 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 06:52:01,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:01,483 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 06:52:01,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:01,503 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 06:52:01,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:01,513 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 11 treesize of output 1 [2023-11-29 06:52:01,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:01,521 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 06:52:01,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:01,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:52:01,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:01,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:01,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:01,549 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 06:52:01,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:01,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:01,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:01,577 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 06:52:01,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:01,585 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 06:52:01,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:01,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-29 06:52:01,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:01,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:01,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:01,611 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 06:52:01,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:01,618 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 06:52:01,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:01,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:01,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:01,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:01,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:01,661 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 06:52:01,670 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 06:52:01,670 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:52:01,671 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:52:01,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527530111] [2023-11-29 06:52:01,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527530111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:52:01,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:52:01,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:52:01,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270259228] [2023-11-29 06:52:01,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:52:01,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:52:01,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:52:01,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:52:01,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:52:01,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 70 [2023-11-29 06:52:01,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 66 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:01,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:52:01,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 70 [2023-11-29 06:52:01,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:52:02,251 INFO L124 PetriNetUnfolderBase]: 1316/2201 cut-off events. [2023-11-29 06:52:02,252 INFO L125 PetriNetUnfolderBase]: For 174/176 co-relation queries the response was YES. [2023-11-29 06:52:02,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4214 conditions, 2201 events. 1316/2201 cut-off events. For 174/176 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 13231 event pairs, 1060 based on Foata normal form. 1/1520 useless extension candidates. Maximal degree in co-relation 4087. Up to 1877 conditions per place. [2023-11-29 06:52:02,281 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 30 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-11-29 06:52:02,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 196 flow [2023-11-29 06:52:02,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:52:02,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:52:02,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2023-11-29 06:52:02,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2023-11-29 06:52:02,295 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 127 transitions. [2023-11-29 06:52:02,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 127 transitions. [2023-11-29 06:52:02,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:52:02,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 127 transitions. [2023-11-29 06:52:02,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 0 states 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 06:52:02,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:02,307 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:02,309 INFO L175 Difference]: Start difference. First operand has 72 places, 66 transitions, 150 flow. Second operand 3 states and 127 transitions. [2023-11-29 06:52:02,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 196 flow [2023-11-29 06:52:02,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 57 transitions, 184 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 06:52:02,320 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 124 flow [2023-11-29 06:52:02,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2023-11-29 06:52:02,326 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -13 predicate places. [2023-11-29 06:52:02,326 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 124 flow [2023-11-29 06:52:02,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:02,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:52:02,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 06:52:02,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:02,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:02,528 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 06:52:02,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:02,528 INFO L85 PathProgramCache]: Analyzing trace with hash 504188, now seen corresponding path program 1 times [2023-11-29 06:52:02,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:52:02,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797397725] [2023-11-29 06:52:02,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:02,529 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 06:52:02,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:52:02,530 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:02,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:02,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:52:02,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:02,669 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 06:52:02,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:02,705 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 23 treesize of output 1 [2023-11-29 06:52:02,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:02,728 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 06:52:02,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:02,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:02,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:02,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:02,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:02,774 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 06:52:02,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:02,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:52:02,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:02,809 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 06:52:02,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:02,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:02,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:02,845 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 06:52:02,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:02,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:52:02,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:02,865 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 06:52:02,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:02,877 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 06:52:02,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:02,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:02,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:02,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:02,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:02,910 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 06:52:02,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:02,933 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 06:52:02,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:02,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:02,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:02,960 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 06:52:02,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:02,968 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 06:52:02,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:02,977 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 06:52:02,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:02,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:03,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:03,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:03,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:03,023 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 06:52:03,095 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 06:52:03,096 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:52:03,096 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:52:03,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797397725] [2023-11-29 06:52:03,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797397725] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:52:03,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:52:03,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:52:03,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117266210] [2023-11-29 06:52:03,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:52:03,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:52:03,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:52:03,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:52:03,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:52:03,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 70 [2023-11-29 06:52:03,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 06:52:03,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:52:03,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 70 [2023-11-29 06:52:03,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:52:03,793 INFO L124 PetriNetUnfolderBase]: 1317/2204 cut-off events. [2023-11-29 06:52:03,793 INFO L125 PetriNetUnfolderBase]: For 43/45 co-relation queries the response was YES. [2023-11-29 06:52:03,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4136 conditions, 2204 events. 1317/2204 cut-off events. For 43/45 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 13267 event pairs, 1060 based on Foata normal form. 0/1522 useless extension candidates. Maximal degree in co-relation 4114. Up to 1882 conditions per place. [2023-11-29 06:52:03,815 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 32 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-11-29 06:52:03,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 60 transitions, 204 flow [2023-11-29 06:52:03,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:52:03,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:52:03,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2023-11-29 06:52:03,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5464285714285714 [2023-11-29 06:52:03,818 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 153 transitions. [2023-11-29 06:52:03,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 153 transitions. [2023-11-29 06:52:03,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:52:03,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 153 transitions. [2023-11-29 06:52:03,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 06:52:03,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:03,823 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:03,823 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 124 flow. Second operand 4 states and 153 transitions. [2023-11-29 06:52:03,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 60 transitions, 204 flow [2023-11-29 06:52:03,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 60 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 06:52:03,826 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 147 flow [2023-11-29 06:52:03,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2023-11-29 06:52:03,828 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -10 predicate places. [2023-11-29 06:52:03,828 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 147 flow [2023-11-29 06:52:03,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 06:52:03,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:52:03,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 06:52:03,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:04,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:04,032 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 06:52:04,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:04,032 INFO L85 PathProgramCache]: Analyzing trace with hash 504236, now seen corresponding path program 1 times [2023-11-29 06:52:04,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:52:04,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657222159] [2023-11-29 06:52:04,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:04,033 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 06:52:04,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:52:04,034 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:04,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:04,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:04,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:52:04,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:04,128 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 06:52:04,128 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:52:04,128 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:52:04,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657222159] [2023-11-29 06:52:04,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [657222159] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:52:04,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:52:04,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:52:04,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473714692] [2023-11-29 06:52:04,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:52:04,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:52:04,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:52:04,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:52:04,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:52:04,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 70 [2023-11-29 06:52:04,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:04,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:52:04,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 70 [2023-11-29 06:52:04,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:52:04,523 INFO L124 PetriNetUnfolderBase]: 1316/2203 cut-off events. [2023-11-29 06:52:04,523 INFO L125 PetriNetUnfolderBase]: For 43/45 co-relation queries the response was YES. [2023-11-29 06:52:04,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4141 conditions, 2203 events. 1316/2203 cut-off events. For 43/45 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 13237 event pairs, 1060 based on Foata normal form. 1/1522 useless extension candidates. Maximal degree in co-relation 4125. Up to 1880 conditions per place. [2023-11-29 06:52:04,543 INFO L140 encePairwiseOnDemand]: 67/70 looper letters, 32 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-11-29 06:52:04,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 59 transitions, 210 flow [2023-11-29 06:52:04,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:52:04,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:52:04,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2023-11-29 06:52:04,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2023-11-29 06:52:04,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 125 transitions. [2023-11-29 06:52:04,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 125 transitions. [2023-11-29 06:52:04,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:52:04,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 125 transitions. [2023-11-29 06:52:04,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 06:52:04,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:04,548 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:04,548 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 147 flow. Second operand 3 states and 125 transitions. [2023-11-29 06:52:04,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 59 transitions, 210 flow [2023-11-29 06:52:04,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 59 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:52:04,550 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 144 flow [2023-11-29 06:52:04,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2023-11-29 06:52:04,551 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2023-11-29 06:52:04,551 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 144 flow [2023-11-29 06:52:04,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:04,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:52:04,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 06:52:04,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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)] Forceful destruction successful, exit code 0 [2023-11-29 06:52:04,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:04,752 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 06:52:04,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:04,753 INFO L85 PathProgramCache]: Analyzing trace with hash 484540716, now seen corresponding path program 1 times [2023-11-29 06:52:04,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:52:04,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134059728] [2023-11-29 06:52:04,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:04,754 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 06:52:04,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:52:04,754 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:04,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:04,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 06:52:04,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:04,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:04,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:04,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:04,875 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 14 treesize of output 18 [2023-11-29 06:52:04,899 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-29 06:52:04,900 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 23 treesize of output 19 [2023-11-29 06:52:04,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:04,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:05,003 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2023-11-29 06:52:05,003 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 06:52:05,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:05,021 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 06:52:06,033 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 06:52:06,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:06,376 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 06:52:06,377 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:52:06,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134059728] [2023-11-29 06:52:06,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134059728] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:06,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:52:06,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 06:52:06,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088545113] [2023-11-29 06:52:06,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:06,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:52:06,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:52:06,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:52:06,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:52:07,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 70 [2023-11-29 06:52:07,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 144 flow. Second operand has 10 states, 10 states have (on average 27.0) internal successors, (270), 10 states have internal predecessors, (270), 0 states have call successors, (0), 0 states 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 06:52:07,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:52:07,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 70 [2023-11-29 06:52:07,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:52:09,187 INFO L124 PetriNetUnfolderBase]: 1965/3131 cut-off events. [2023-11-29 06:52:09,187 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-29 06:52:09,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5942 conditions, 3131 events. 1965/3131 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 18251 event pairs, 1600 based on Foata normal form. 0/2208 useless extension candidates. Maximal degree in co-relation 5925. Up to 2745 conditions per place. [2023-11-29 06:52:09,204 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 34 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-11-29 06:52:09,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 60 transitions, 230 flow [2023-11-29 06:52:09,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:52:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:52:09,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 197 transitions. [2023-11-29 06:52:09,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2023-11-29 06:52:09,207 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 197 transitions. [2023-11-29 06:52:09,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 197 transitions. [2023-11-29 06:52:09,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:52:09,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 197 transitions. [2023-11-29 06:52:09,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 32.833333333333336) internal successors, (197), 6 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 06:52:09,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:09,211 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:09,211 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 144 flow. Second operand 6 states and 197 transitions. [2023-11-29 06:52:09,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 60 transitions, 230 flow [2023-11-29 06:52:09,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 60 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 06:52:09,213 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 161 flow [2023-11-29 06:52:09,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=161, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2023-11-29 06:52:09,214 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -7 predicate places. [2023-11-29 06:52:09,215 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 161 flow [2023-11-29 06:52:09,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.0) internal successors, (270), 10 states have internal predecessors, (270), 0 states have call successors, (0), 0 states 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 06:52:09,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:52:09,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 06:52:09,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:09,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:09,418 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 06:52:09,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:09,418 INFO L85 PathProgramCache]: Analyzing trace with hash 484540715, now seen corresponding path program 1 times [2023-11-29 06:52:09,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:52:09,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989510709] [2023-11-29 06:52:09,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:09,419 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 06:52:09,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:52:09,420 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:09,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:09,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:52:09,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:09,510 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 06:52:09,510 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 06:52:09,535 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-29 06:52:09,535 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 06:52:09,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:09,566 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-29 06:52:09,567 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 06:52:09,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:09,605 INFO L349 Elim1Store]: treesize reduction 60, result has 10.4 percent of original size [2023-11-29 06:52:09,605 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 06:52:09,632 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 06:52:09,633 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 06:52:09,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:09,665 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-29 06:52:09,666 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 06:52:09,875 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 06:52:09,875 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:52:09,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:52:09,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989510709] [2023-11-29 06:52:09,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989510709] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:52:09,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:52:09,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:52:09,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841258775] [2023-11-29 06:52:09,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:52:09,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:52:09,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:52:09,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:52:09,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:52:09,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 70 [2023-11-29 06:52:09,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 06:52:09,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:52:09,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 70 [2023-11-29 06:52:09,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:52:10,440 INFO L124 PetriNetUnfolderBase]: 1965/3094 cut-off events. [2023-11-29 06:52:10,440 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-29 06:52:10,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5913 conditions, 3094 events. 1965/3094 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 17663 event pairs, 1600 based on Foata normal form. 0/2173 useless extension candidates. Maximal degree in co-relation 5874. Up to 2749 conditions per place. [2023-11-29 06:52:10,458 INFO L140 encePairwiseOnDemand]: 67/70 looper letters, 37 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-11-29 06:52:10,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 233 flow [2023-11-29 06:52:10,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:52:10,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:52:10,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2023-11-29 06:52:10,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2023-11-29 06:52:10,460 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 114 transitions. [2023-11-29 06:52:10,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 114 transitions. [2023-11-29 06:52:10,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:52:10,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 114 transitions. [2023-11-29 06:52:10,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 06:52:10,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:10,462 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:10,462 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 161 flow. Second operand 3 states and 114 transitions. [2023-11-29 06:52:10,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 233 flow [2023-11-29 06:52:10,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 57 transitions, 228 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 06:52:10,465 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 154 flow [2023-11-29 06:52:10,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2023-11-29 06:52:10,466 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -10 predicate places. [2023-11-29 06:52:10,466 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 154 flow [2023-11-29 06:52:10,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 06:52:10,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:52:10,466 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-29 06:52:10,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:10,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:10,667 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 06:52:10,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:10,667 INFO L85 PathProgramCache]: Analyzing trace with hash 484540668, now seen corresponding path program 1 times [2023-11-29 06:52:10,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:52:10,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53260902] [2023-11-29 06:52:10,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:10,668 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 06:52:10,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:52:10,669 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:10,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:10,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:52:10,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:10,759 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 06:52:10,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:10,780 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 06:52:10,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:10,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:10,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:10,798 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 06:52:10,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:10,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:10,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:10,817 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 06:52:10,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:10,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:10,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:10,847 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 06:52:10,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:10,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:10,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:10,877 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 06:52:10,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:10,904 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 06:52:10,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:10,923 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 06:52:10,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:10,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:10,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:10,941 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 06:52:10,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:10,950 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 06:52:10,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:10,956 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 06:52:10,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:10,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:10,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:10,987 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 06:52:10,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:10,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:11,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:11,003 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 06:52:11,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:11,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:11,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:11,030 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 06:52:11,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:11,039 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 06:52:11,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:11,045 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 06:52:11,160 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 06:52:11,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:11,500 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 06:52:11,500 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:52:11,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53260902] [2023-11-29 06:52:11,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53260902] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:11,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:52:11,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 06:52:11,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83701030] [2023-11-29 06:52:11,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:11,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:52:11,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:52:11,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:52:11,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:52:12,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 70 [2023-11-29 06:52:12,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 154 flow. Second operand has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:12,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:52:12,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 70 [2023-11-29 06:52:12,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:52:13,318 INFO L124 PetriNetUnfolderBase]: 1319/2138 cut-off events. [2023-11-29 06:52:13,318 INFO L125 PetriNetUnfolderBase]: For 47/49 co-relation queries the response was YES. [2023-11-29 06:52:13,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4107 conditions, 2138 events. 1319/2138 cut-off events. For 47/49 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 12130 event pairs, 1060 based on Foata normal form. 3/1534 useless extension candidates. Maximal degree in co-relation 4097. Up to 1884 conditions per place. [2023-11-29 06:52:13,333 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 32 selfloop transitions, 12 changer transitions 0/64 dead transitions. [2023-11-29 06:52:13,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 64 transitions, 278 flow [2023-11-29 06:52:13,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:52:13,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 06:52:13,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 337 transitions. [2023-11-29 06:52:13,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48142857142857143 [2023-11-29 06:52:13,336 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 337 transitions. [2023-11-29 06:52:13,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 337 transitions. [2023-11-29 06:52:13,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:52:13,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 337 transitions. [2023-11-29 06:52:13,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 33.7) internal successors, (337), 10 states have internal predecessors, (337), 0 states have call successors, (0), 0 states 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 06:52:13,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 06:52:13,340 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 06:52:13,340 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 154 flow. Second operand 10 states and 337 transitions. [2023-11-29 06:52:13,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 64 transitions, 278 flow [2023-11-29 06:52:13,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 64 transitions, 275 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 06:52:13,343 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 229 flow [2023-11-29 06:52:13,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=229, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2023-11-29 06:52:13,344 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2023-11-29 06:52:13,344 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 229 flow [2023-11-29 06:52:13,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.0) internal successors, (300), 10 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:13,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:52:13,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:13,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:13,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:13,546 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 06:52:13,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:13,547 INFO L85 PathProgramCache]: Analyzing trace with hash -432129652, now seen corresponding path program 1 times [2023-11-29 06:52:13,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:52:13,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95262871] [2023-11-29 06:52:13,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:13,547 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 06:52:13,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:52:13,548 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:13,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:13,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:52:13,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:13,647 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-29 06:52:13,648 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 06:52:13,664 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 06:52:13,664 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 06:52:13,684 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 06:52:13,684 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 06:52:13,709 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-29 06:52:13,709 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 06:52:13,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:13,732 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 06:52:13,732 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 06:52:13,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:13,771 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-29 06:52:13,772 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 06:52:13,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:13,794 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-29 06:52:13,794 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 06:52:13,808 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 06:52:13,808 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 06:52:14,104 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 06:52:14,104 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:52:14,105 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:52:14,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95262871] [2023-11-29 06:52:14,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95262871] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:52:14,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:52:14,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:52:14,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770087817] [2023-11-29 06:52:14,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:52:14,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:52:14,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:52:14,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:52:14,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:52:14,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 70 [2023-11-29 06:52:14,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 229 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 06:52:14,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:52:14,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 70 [2023-11-29 06:52:14,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:52:14,486 INFO L124 PetriNetUnfolderBase]: 1397/2268 cut-off events. [2023-11-29 06:52:14,486 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-11-29 06:52:14,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4379 conditions, 2268 events. 1397/2268 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 12781 event pairs, 1125 based on Foata normal form. 0/1635 useless extension candidates. Maximal degree in co-relation 4365. Up to 2010 conditions per place. [2023-11-29 06:52:14,494 INFO L140 encePairwiseOnDemand]: 67/70 looper letters, 44 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2023-11-29 06:52:14,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 62 transitions, 315 flow [2023-11-29 06:52:14,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:52:14,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:52:14,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2023-11-29 06:52:14,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2023-11-29 06:52:14,496 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 114 transitions. [2023-11-29 06:52:14,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 114 transitions. [2023-11-29 06:52:14,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:52:14,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 114 transitions. [2023-11-29 06:52:14,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 06:52:14,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:14,498 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:14,498 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 229 flow. Second operand 3 states and 114 transitions. [2023-11-29 06:52:14,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 62 transitions, 315 flow [2023-11-29 06:52:14,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 62 transitions, 271 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-11-29 06:52:14,501 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 183 flow [2023-11-29 06:52:14,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2023-11-29 06:52:14,502 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -4 predicate places. [2023-11-29 06:52:14,502 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 183 flow [2023-11-29 06:52:14,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 06:52:14,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:52:14,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:14,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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)] Ended with exit code 0 [2023-11-29 06:52:14,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:14,703 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 06:52:14,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:14,703 INFO L85 PathProgramCache]: Analyzing trace with hash -432129651, now seen corresponding path program 1 times [2023-11-29 06:52:14,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:52:14,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357885347] [2023-11-29 06:52:14,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:14,704 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 06:52:14,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:52:14,705 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:14,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:14,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 06:52:14,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:14,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:14,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-29 06:52:14,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:14,812 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 06:52:14,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:14,855 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 06:52:14,855 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 21 treesize of output 17 [2023-11-29 06:52:14,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:14,868 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 06:52:14,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:14,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:14,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:14,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:14,901 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 06:52:14,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:14,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:14,942 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 06:52:14,943 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 06:52:14,950 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 06:52:14,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:14,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:14,993 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 06:52:14,993 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 06:52:14,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:15,002 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 06:52:15,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:15,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:15,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:15,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:15,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:15,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:15,063 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 06:52:15,063 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 06:52:15,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:15,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:15,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:15,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:15,644 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 06:52:15,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:15,985 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 06:52:15,985 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:52:15,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357885347] [2023-11-29 06:52:15,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357885347] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:15,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:52:15,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 06:52:15,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513002085] [2023-11-29 06:52:15,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:15,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:52:15,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:52:15,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:52:15,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:52:16,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 70 [2023-11-29 06:52:16,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 183 flow. Second operand has 10 states, 10 states have (on average 27.4) internal successors, (274), 10 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 06:52:16,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:52:16,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 70 [2023-11-29 06:52:16,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:52:18,078 INFO L124 PetriNetUnfolderBase]: 1397/2261 cut-off events. [2023-11-29 06:52:18,078 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-29 06:52:18,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4350 conditions, 2261 events. 1397/2261 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 12669 event pairs, 1125 based on Foata normal form. 0/1627 useless extension candidates. Maximal degree in co-relation 4337. Up to 2006 conditions per place. [2023-11-29 06:52:18,086 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 40 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-11-29 06:52:18,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 60 transitions, 269 flow [2023-11-29 06:52:18,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:52:18,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:52:18,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 197 transitions. [2023-11-29 06:52:18,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2023-11-29 06:52:18,089 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 197 transitions. [2023-11-29 06:52:18,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 197 transitions. [2023-11-29 06:52:18,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:52:18,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 197 transitions. [2023-11-29 06:52:18,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 32.833333333333336) internal successors, (197), 6 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 06:52:18,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:18,090 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:18,090 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 183 flow. Second operand 6 states and 197 transitions. [2023-11-29 06:52:18,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 60 transitions, 269 flow [2023-11-29 06:52:18,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 60 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:52:18,093 INFO L231 Difference]: Finished difference. Result has 70 places, 60 transitions, 188 flow [2023-11-29 06:52:18,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=188, PETRI_PLACES=70, PETRI_TRANSITIONS=60} [2023-11-29 06:52:18,094 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -2 predicate places. [2023-11-29 06:52:18,094 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 60 transitions, 188 flow [2023-11-29 06:52:18,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.4) internal successors, (274), 10 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 06:52:18,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:52:18,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:18,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:18,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:18,298 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 06:52:18,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:18,298 INFO L85 PathProgramCache]: Analyzing trace with hash -511061778, now seen corresponding path program 1 times [2023-11-29 06:52:18,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:52:18,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8833428] [2023-11-29 06:52:18,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:18,299 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 06:52:18,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:52:18,300 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:18,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:18,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:52:18,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:18,363 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 06:52:18,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:18,367 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 06:52:18,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:18,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:18,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:18,376 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 06:52:18,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:18,386 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 06:52:18,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:18,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:18,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:18,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:18,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:18,410 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 16 treesize of output 1 [2023-11-29 06:52:18,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:18,422 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 06:52:18,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:18,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:18,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:18,446 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 06:52:18,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:18,456 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 16 treesize of output 1 [2023-11-29 06:52:18,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:18,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:18,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:18,466 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 06:52:18,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:18,469 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 6 treesize of output 1 [2023-11-29 06:52:18,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:18,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:18,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:18,480 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 11 treesize of output 1 [2023-11-29 06:52:18,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:18,490 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 06:52:18,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:18,500 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 06:52:18,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:18,505 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 06:52:18,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:18,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:18,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:18,513 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 06:52:18,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:18,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-29 06:52:18,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:18,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:18,540 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 06:52:18,540 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:52:18,540 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:52:18,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8833428] [2023-11-29 06:52:18,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8833428] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:52:18,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:52:18,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:52:18,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941994890] [2023-11-29 06:52:18,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:52:18,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:52:18,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:52:18,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:52:18,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:52:18,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 70 [2023-11-29 06:52:18,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 60 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 06:52:18,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:52:18,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 70 [2023-11-29 06:52:18,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:52:18,840 INFO L124 PetriNetUnfolderBase]: 795/1315 cut-off events. [2023-11-29 06:52:18,840 INFO L125 PetriNetUnfolderBase]: For 37/39 co-relation queries the response was YES. [2023-11-29 06:52:18,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2535 conditions, 1315 events. 795/1315 cut-off events. For 37/39 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6711 event pairs, 608 based on Foata normal form. 0/1071 useless extension candidates. Maximal degree in co-relation 2521. Up to 1137 conditions per place. [2023-11-29 06:52:18,845 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 35 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2023-11-29 06:52:18,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 57 transitions, 262 flow [2023-11-29 06:52:18,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:52:18,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 06:52:18,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 148 transitions. [2023-11-29 06:52:18,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2023-11-29 06:52:18,846 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 148 transitions. [2023-11-29 06:52:18,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 148 transitions. [2023-11-29 06:52:18,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:52:18,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 148 transitions. [2023-11-29 06:52:18,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states 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 06:52:18,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:18,848 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:18,848 INFO L175 Difference]: Start difference. First operand has 70 places, 60 transitions, 188 flow. Second operand 4 states and 148 transitions. [2023-11-29 06:52:18,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 57 transitions, 262 flow [2023-11-29 06:52:18,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 57 transitions, 254 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 06:52:18,850 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 184 flow [2023-11-29 06:52:18,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2023-11-29 06:52:18,850 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -6 predicate places. [2023-11-29 06:52:18,850 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 184 flow [2023-11-29 06:52:18,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states 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 06:52:18,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:52:18,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:18,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:19,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:19,051 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 06:52:19,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:19,052 INFO L85 PathProgramCache]: Analyzing trace with hash -511061777, now seen corresponding path program 1 times [2023-11-29 06:52:19,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:52:19,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929080978] [2023-11-29 06:52:19,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:19,052 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 06:52:19,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:52:19,053 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:19,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:19,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:52:19,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:19,210 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 06:52:19,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:19,402 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 06:52:19,478 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 06:52:19,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:52:19,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929080978] [2023-11-29 06:52:19,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929080978] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:19,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:52:19,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 06:52:19,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692224873] [2023-11-29 06:52:19,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:19,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:52:19,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:52:19,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:52:19,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:52:20,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 70 [2023-11-29 06:52:20,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 184 flow. Second operand has 10 states, 10 states have (on average 31.4) internal successors, (314), 10 states have internal predecessors, (314), 0 states have call successors, (0), 0 states 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 06:52:20,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:52:20,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 70 [2023-11-29 06:52:20,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:52:21,655 INFO L124 PetriNetUnfolderBase]: 1151/1829 cut-off events. [2023-11-29 06:52:21,655 INFO L125 PetriNetUnfolderBase]: For 37/39 co-relation queries the response was YES. [2023-11-29 06:52:21,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3543 conditions, 1829 events. 1151/1829 cut-off events. For 37/39 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 9528 event pairs, 483 based on Foata normal form. 0/1553 useless extension candidates. Maximal degree in co-relation 3529. Up to 990 conditions per place. [2023-11-29 06:52:21,665 INFO L140 encePairwiseOnDemand]: 62/70 looper letters, 61 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2023-11-29 06:52:21,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 90 transitions, 400 flow [2023-11-29 06:52:21,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:52:21,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 06:52:21,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 308 transitions. [2023-11-29 06:52:21,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-11-29 06:52:21,667 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 308 transitions. [2023-11-29 06:52:21,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 308 transitions. [2023-11-29 06:52:21,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:52:21,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 308 transitions. [2023-11-29 06:52:21,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 38.5) internal successors, (308), 8 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 06:52:21,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states 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 06:52:21,671 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states 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 06:52:21,671 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 184 flow. Second operand 8 states and 308 transitions. [2023-11-29 06:52:21,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 90 transitions, 400 flow [2023-11-29 06:52:21,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 90 transitions, 394 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 06:52:21,674 INFO L231 Difference]: Finished difference. Result has 73 places, 60 transitions, 226 flow [2023-11-29 06:52:21,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=226, PETRI_PLACES=73, PETRI_TRANSITIONS=60} [2023-11-29 06:52:21,675 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2023-11-29 06:52:21,675 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 60 transitions, 226 flow [2023-11-29 06:52:21,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.4) internal successors, (314), 10 states have internal predecessors, (314), 0 states have call successors, (0), 0 states 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 06:52:21,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:52:21,675 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2023-11-29 06:52:21,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:21,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:21,876 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 06:52:21,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:21,876 INFO L85 PathProgramCache]: Analyzing trace with hash -770986116, now seen corresponding path program 2 times [2023-11-29 06:52:21,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:52:21,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783146882] [2023-11-29 06:52:21,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:52:21,876 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 06:52:21,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:52:21,877 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:21,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:21,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:52:21,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:52:21,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:52:21,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:21,981 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 06:52:21,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:21,998 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 06:52:22,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:22,015 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 06:52:22,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:22,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:22,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:22,041 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 06:52:22,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:22,066 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 06:52:22,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:22,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:22,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:22,082 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 06:52:22,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:22,091 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 06:52:22,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:22,097 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 06:52:22,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:22,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:22,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:22,121 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 06:52:22,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:22,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:22,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:22,136 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 06:52:22,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:22,142 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 06:52:22,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:22,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:22,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:22,167 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 06:52:22,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:22,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:22,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:22,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:22,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:22,201 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 06:52:22,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:22,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:22,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:22,215 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 06:52:22,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:22,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:52:22,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:22,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:22,455 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 06:52:22,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:23,087 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 06:52:23,087 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:52:23,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783146882] [2023-11-29 06:52:23,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783146882] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:23,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:52:23,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2023-11-29 06:52:23,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355929044] [2023-11-29 06:52:23,088 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:23,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:52:23,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:52:23,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:52:23,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:52:25,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 70 [2023-11-29 06:52:25,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 60 transitions, 226 flow. Second operand has 14 states, 14 states have (on average 30.571428571428573) internal successors, (428), 14 states have internal predecessors, (428), 0 states have call successors, (0), 0 states 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 06:52:25,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:52:25,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 70 [2023-11-29 06:52:25,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:52:28,399 INFO L124 PetriNetUnfolderBase]: 1157/1844 cut-off events. [2023-11-29 06:52:28,400 INFO L125 PetriNetUnfolderBase]: For 997/999 co-relation queries the response was YES. [2023-11-29 06:52:28,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4365 conditions, 1844 events. 1157/1844 cut-off events. For 997/999 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 9556 event pairs, 858 based on Foata normal form. 6/1630 useless extension candidates. Maximal degree in co-relation 4349. Up to 1628 conditions per place. [2023-11-29 06:52:28,407 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 32 selfloop transitions, 30 changer transitions 0/78 dead transitions. [2023-11-29 06:52:28,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 78 transitions, 458 flow [2023-11-29 06:52:28,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 06:52:28,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-29 06:52:28,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 703 transitions. [2023-11-29 06:52:28,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564935064935065 [2023-11-29 06:52:28,411 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 703 transitions. [2023-11-29 06:52:28,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 703 transitions. [2023-11-29 06:52:28,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:52:28,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 703 transitions. [2023-11-29 06:52:28,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 31.954545454545453) internal successors, (703), 22 states have internal predecessors, (703), 0 states have call successors, (0), 0 states 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 06:52:28,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 70.0) internal successors, (1610), 23 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states 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 06:52:28,416 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 70.0) internal successors, (1610), 23 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states 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 06:52:28,417 INFO L175 Difference]: Start difference. First operand has 73 places, 60 transitions, 226 flow. Second operand 22 states and 703 transitions. [2023-11-29 06:52:28,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 78 transitions, 458 flow [2023-11-29 06:52:28,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 78 transitions, 452 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 06:52:28,420 INFO L231 Difference]: Finished difference. Result has 97 places, 78 transitions, 418 flow [2023-11-29 06:52:28,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=418, PETRI_PLACES=97, PETRI_TRANSITIONS=78} [2023-11-29 06:52:28,421 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 25 predicate places. [2023-11-29 06:52:28,421 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 78 transitions, 418 flow [2023-11-29 06:52:28,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 30.571428571428573) internal successors, (428), 14 states have internal predecessors, (428), 0 states have call successors, (0), 0 states 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 06:52:28,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:52:28,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:28,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:28,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:28,622 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 06:52:28,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:28,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1556965591, now seen corresponding path program 1 times [2023-11-29 06:52:28,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:52:28,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219700814] [2023-11-29 06:52:28,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:28,623 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 06:52:28,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:52:28,623 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:28,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:28,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:52:28,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:28,740 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 06:52:28,740 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 06:52:28,755 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 06:52:28,755 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 06:52:28,776 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 06:52:28,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 06:52:28,794 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 06:52:28,794 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 06:52:28,816 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 06:52:28,816 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 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 06:52:28,832 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 06:52:28,832 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 06:52:28,854 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 06:52:28,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 06:52:28,876 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 06:52:28,877 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 06:52:28,896 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 06:52:28,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 06:52:28,910 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 06:52:28,910 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 06:52:28,929 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 06:52:28,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-11-29 06:52:28,943 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-29 06:52:28,943 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 06:52:29,097 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 06:52:29,097 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:52:29,097 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:52:29,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219700814] [2023-11-29 06:52:29,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219700814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:52:29,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:52:29,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 06:52:29,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540097499] [2023-11-29 06:52:29,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:52:29,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:52:29,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:52:29,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:52:29,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:52:29,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 70 [2023-11-29 06:52:29,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 78 transitions, 418 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:29,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:52:29,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 70 [2023-11-29 06:52:29,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:52:29,418 INFO L124 PetriNetUnfolderBase]: 1237/1927 cut-off events. [2023-11-29 06:52:29,418 INFO L125 PetriNetUnfolderBase]: For 1095/1095 co-relation queries the response was YES. [2023-11-29 06:52:29,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4676 conditions, 1927 events. 1237/1927 cut-off events. For 1095/1095 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9744 event pairs, 920 based on Foata normal form. 0/1740 useless extension candidates. Maximal degree in co-relation 4654. Up to 1766 conditions per place. [2023-11-29 06:52:29,441 INFO L140 encePairwiseOnDemand]: 67/70 looper letters, 62 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-11-29 06:52:29,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 76 transitions, 540 flow [2023-11-29 06:52:29,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:52:29,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 06:52:29,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2023-11-29 06:52:29,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2023-11-29 06:52:29,443 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 111 transitions. [2023-11-29 06:52:29,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 111 transitions. [2023-11-29 06:52:29,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:52:29,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 111 transitions. [2023-11-29 06:52:29,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:29,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:29,445 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:29,445 INFO L175 Difference]: Start difference. First operand has 97 places, 78 transitions, 418 flow. Second operand 3 states and 111 transitions. [2023-11-29 06:52:29,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 76 transitions, 540 flow [2023-11-29 06:52:29,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 76 transitions, 462 flow, removed 27 selfloop flow, removed 9 redundant places. [2023-11-29 06:52:29,450 INFO L231 Difference]: Finished difference. Result has 88 places, 76 transitions, 338 flow [2023-11-29 06:52:29,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=338, PETRI_PLACES=88, PETRI_TRANSITIONS=76} [2023-11-29 06:52:29,451 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 16 predicate places. [2023-11-29 06:52:29,451 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 76 transitions, 338 flow [2023-11-29 06:52:29,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:29,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:52:29,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:29,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:29,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:29,655 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 06:52:29,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:29,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1556965590, now seen corresponding path program 1 times [2023-11-29 06:52:29,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:52:29,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859798623] [2023-11-29 06:52:29,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:29,656 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 06:52:29,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:52:29,656 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:29,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:29,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:52:29,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:29,808 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-29 06:52:29,809 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 21 treesize of output 17 [2023-11-29 06:52:29,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:29,849 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 06:52:29,849 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 06:52:29,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:29,885 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 06:52:29,886 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 06:52:29,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:29,910 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 06:52:29,910 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 06:52:29,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:29,933 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 06:52:29,933 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 06:52:29,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:29,968 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 06:52:29,968 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 06:52:29,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:29,993 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 06:52:29,993 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 06:52:30,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:30,024 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 06:52:30,024 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 06:52:30,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:30,044 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 06:52:30,044 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 06:52:30,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:30,066 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 06:52:30,067 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 06:52:30,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:30,099 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 06:52:30,099 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 06:52:30,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:30,122 INFO L349 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2023-11-29 06:52:30,122 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 06:52:30,753 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 06:52:30,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:31,092 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 06:52:31,092 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:52:31,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859798623] [2023-11-29 06:52:31,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859798623] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:31,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:52:31,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 06:52:31,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807973547] [2023-11-29 06:52:31,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:31,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:52:31,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:52:31,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:52:31,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:52:31,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 70 [2023-11-29 06:52:31,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 76 transitions, 338 flow. Second operand has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states 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 06:52:31,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:52:31,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 70 [2023-11-29 06:52:31,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:52:32,851 INFO L124 PetriNetUnfolderBase]: 1237/1910 cut-off events. [2023-11-29 06:52:32,851 INFO L125 PetriNetUnfolderBase]: For 1095/1095 co-relation queries the response was YES. [2023-11-29 06:52:32,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4621 conditions, 1910 events. 1237/1910 cut-off events. For 1095/1095 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9537 event pairs, 920 based on Foata normal form. 0/1723 useless extension candidates. Maximal degree in co-relation 4599. Up to 1762 conditions per place. [2023-11-29 06:52:32,860 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 58 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2023-11-29 06:52:32,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 74 transitions, 460 flow [2023-11-29 06:52:32,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:52:32,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 06:52:32,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2023-11-29 06:52:32,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2023-11-29 06:52:32,861 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 194 transitions. [2023-11-29 06:52:32,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 194 transitions. [2023-11-29 06:52:32,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:52:32,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 194 transitions. [2023-11-29 06:52:32,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 32.333333333333336) internal successors, (194), 6 states have internal predecessors, (194), 0 states have call successors, (0), 0 states 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 06:52:32,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:32,863 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 70.0) internal successors, (490), 7 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:32,863 INFO L175 Difference]: Start difference. First operand has 88 places, 76 transitions, 338 flow. Second operand 6 states and 194 transitions. [2023-11-29 06:52:32,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 74 transitions, 460 flow [2023-11-29 06:52:32,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 74 transitions, 459 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 06:52:32,866 INFO L231 Difference]: Finished difference. Result has 90 places, 74 transitions, 343 flow [2023-11-29 06:52:32,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=343, PETRI_PLACES=90, PETRI_TRANSITIONS=74} [2023-11-29 06:52:32,867 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 18 predicate places. [2023-11-29 06:52:32,867 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 74 transitions, 343 flow [2023-11-29 06:52:32,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.8) internal successors, (278), 10 states have internal predecessors, (278), 0 states have call successors, (0), 0 states 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 06:52:32,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:52:32,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:32,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:33,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:33,068 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 06:52:33,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:33,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1021269253, now seen corresponding path program 1 times [2023-11-29 06:52:33,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:52:33,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [657977903] [2023-11-29 06:52:33,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:33,069 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 06:52:33,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:52:33,070 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:33,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:33,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:33,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:52:33,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:33,227 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 06:52:33,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:33,444 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 25 treesize of output 21 [2023-11-29 06:52:33,518 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 06:52:33,519 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:52:33,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [657977903] [2023-11-29 06:52:33,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [657977903] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:33,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:52:33,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-29 06:52:33,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606481257] [2023-11-29 06:52:33,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:33,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:52:33,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:52:33,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:52:33,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:52:34,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 70 [2023-11-29 06:52:34,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 74 transitions, 343 flow. Second operand has 10 states, 10 states have (on average 31.8) internal successors, (318), 10 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 06:52:34,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:52:34,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 70 [2023-11-29 06:52:34,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:52:35,582 INFO L124 PetriNetUnfolderBase]: 1696/2569 cut-off events. [2023-11-29 06:52:35,582 INFO L125 PetriNetUnfolderBase]: For 1394/1396 co-relation queries the response was YES. [2023-11-29 06:52:35,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6124 conditions, 2569 events. 1696/2569 cut-off events. For 1394/1396 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 12726 event pairs, 654 based on Foata normal form. 0/2355 useless extension candidates. Maximal degree in co-relation 6101. Up to 1398 conditions per place. [2023-11-29 06:52:35,592 INFO L140 encePairwiseOnDemand]: 62/70 looper letters, 80 selfloop transitions, 18 changer transitions 0/111 dead transitions. [2023-11-29 06:52:35,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 111 transitions, 665 flow [2023-11-29 06:52:35,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:52:35,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 06:52:35,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 306 transitions. [2023-11-29 06:52:35,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5464285714285714 [2023-11-29 06:52:35,594 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 306 transitions. [2023-11-29 06:52:35,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 306 transitions. [2023-11-29 06:52:35,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:52:35,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 306 transitions. [2023-11-29 06:52:35,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 38.25) internal successors, (306), 8 states have internal predecessors, (306), 0 states have call successors, (0), 0 states 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 06:52:35,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states 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 06:52:35,597 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states 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 06:52:35,597 INFO L175 Difference]: Start difference. First operand has 90 places, 74 transitions, 343 flow. Second operand 8 states and 306 transitions. [2023-11-29 06:52:35,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 111 transitions, 665 flow [2023-11-29 06:52:35,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 111 transitions, 657 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 06:52:35,600 INFO L231 Difference]: Finished difference. Result has 95 places, 77 transitions, 401 flow [2023-11-29 06:52:35,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=401, PETRI_PLACES=95, PETRI_TRANSITIONS=77} [2023-11-29 06:52:35,601 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 23 predicate places. [2023-11-29 06:52:35,601 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 77 transitions, 401 flow [2023-11-29 06:52:35,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.8) internal successors, (318), 10 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 06:52:35,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:52:35,601 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:35,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:35,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:35,802 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 06:52:35,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:35,802 INFO L85 PathProgramCache]: Analyzing trace with hash 618277183, now seen corresponding path program 1 times [2023-11-29 06:52:35,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:52:35,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573687503] [2023-11-29 06:52:35,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:35,803 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 06:52:35,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:52:35,804 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:35,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:35,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 06:52:35,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:35,903 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 06:52:35,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:35,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:35,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:35,929 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 06:52:35,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:35,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:35,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:35,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:35,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:35,950 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 06:52:35,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:35,957 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 06:52:35,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:35,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:35,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:35,969 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 06:52:35,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:35,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:35,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:35,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:36,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:36,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:52:36,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:36,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:36,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:36,015 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 06:52:36,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:36,021 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 06:52:36,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:36,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:36,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:36,045 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 06:52:36,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:36,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:36,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:36,072 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 06:52:36,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:36,096 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 06:52:36,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:36,112 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 06:52:36,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:36,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:52:36,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:36,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:52:36,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:36,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:36,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:52:36,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:52:36,865 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:52:36,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573687503] [2023-11-29 06:52:36,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573687503] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:36,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:52:36,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-29 06:52:36,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124610375] [2023-11-29 06:52:36,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:36,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:52:36,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:52:36,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:52:36,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:52:38,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 70 [2023-11-29 06:52:38,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 77 transitions, 401 flow. Second operand has 12 states, 12 states have (on average 30.833333333333332) internal successors, (370), 12 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:38,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:52:38,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 70 [2023-11-29 06:52:38,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:52:41,032 INFO L124 PetriNetUnfolderBase]: 4249/6181 cut-off events. [2023-11-29 06:52:41,032 INFO L125 PetriNetUnfolderBase]: For 4568/4570 co-relation queries the response was YES. [2023-11-29 06:52:41,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16863 conditions, 6181 events. 4249/6181 cut-off events. For 4568/4570 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 32510 event pairs, 1152 based on Foata normal form. 344/6239 useless extension candidates. Maximal degree in co-relation 16838. Up to 1734 conditions per place. [2023-11-29 06:52:41,060 INFO L140 encePairwiseOnDemand]: 62/70 looper letters, 201 selfloop transitions, 23 changer transitions 0/236 dead transitions. [2023-11-29 06:52:41,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 236 transitions, 1395 flow [2023-11-29 06:52:41,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 06:52:41,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 06:52:41,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 520 transitions. [2023-11-29 06:52:41,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2023-11-29 06:52:41,063 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 520 transitions. [2023-11-29 06:52:41,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 520 transitions. [2023-11-29 06:52:41,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:52:41,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 520 transitions. [2023-11-29 06:52:41,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 43.333333333333336) internal successors, (520), 12 states have internal predecessors, (520), 0 states have call successors, (0), 0 states 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 06:52:41,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 0 states have call successors, (0), 0 states 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 06:52:41,068 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 0 states have call successors, (0), 0 states 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 06:52:41,068 INFO L175 Difference]: Start difference. First operand has 95 places, 77 transitions, 401 flow. Second operand 12 states and 520 transitions. [2023-11-29 06:52:41,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 236 transitions, 1395 flow [2023-11-29 06:52:41,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 236 transitions, 1379 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 06:52:41,077 INFO L231 Difference]: Finished difference. Result has 106 places, 86 transitions, 496 flow [2023-11-29 06:52:41,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=496, PETRI_PLACES=106, PETRI_TRANSITIONS=86} [2023-11-29 06:52:41,077 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 34 predicate places. [2023-11-29 06:52:41,077 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 86 transitions, 496 flow [2023-11-29 06:52:41,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 30.833333333333332) internal successors, (370), 12 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:41,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:52:41,078 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:41,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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)] Forceful destruction successful, exit code 0 [2023-11-29 06:52:41,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:41,279 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 06:52:41,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:41,279 INFO L85 PathProgramCache]: Analyzing trace with hash 916629148, now seen corresponding path program 1 times [2023-11-29 06:52:41,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:52:41,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74372710] [2023-11-29 06:52:41,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:41,279 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 06:52:41,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:52:41,280 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:41,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:41,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 06:52:41,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:41,374 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 06:52:41,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:41,392 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 06:52:41,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:41,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:41,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:41,404 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 06:52:41,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:41,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:52:41,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:41,417 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 8 treesize of output 1 [2023-11-29 06:52:41,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:41,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:41,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:41,430 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 06:52:41,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:41,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:41,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:41,444 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 06:52:41,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:41,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:52:41,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:41,467 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 06:52:41,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:41,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:41,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:41,492 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 06:52:41,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:41,509 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 06:52:41,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:41,528 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 06:52:41,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:41,542 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 18 treesize of output 1 [2023-11-29 06:52:41,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:41,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:41,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:41,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:52:41,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:41,559 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 06:52:41,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:41,572 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 06:52:41,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:41,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:41,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:41,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:41,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:41,592 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 06:52:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:52:41,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 06:52:42,422 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:52:42,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74372710] [2023-11-29 06:52:42,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74372710] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:42,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:52:42,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-29 06:52:42,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706154491] [2023-11-29 06:52:42,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:42,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:52:42,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:52:42,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:52:42,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:52:44,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 70 [2023-11-29 06:52:44,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 86 transitions, 496 flow. Second operand has 12 states, 12 states have (on average 31.166666666666668) internal successors, (374), 12 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:44,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:52:44,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 70 [2023-11-29 06:52:44,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:52:47,712 INFO L124 PetriNetUnfolderBase]: 7872/11044 cut-off events. [2023-11-29 06:52:47,712 INFO L125 PetriNetUnfolderBase]: For 21012/21871 co-relation queries the response was YES. [2023-11-29 06:52:47,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34755 conditions, 11044 events. 7872/11044 cut-off events. For 21012/21871 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 57757 event pairs, 1406 based on Foata normal form. 1023/11566 useless extension candidates. Maximal degree in co-relation 34726. Up to 3524 conditions per place. [2023-11-29 06:52:47,771 INFO L140 encePairwiseOnDemand]: 62/70 looper letters, 212 selfloop transitions, 24 changer transitions 0/252 dead transitions. [2023-11-29 06:52:47,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 252 transitions, 1839 flow [2023-11-29 06:52:47,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 06:52:47,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-29 06:52:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 465 transitions. [2023-11-29 06:52:47,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6038961038961039 [2023-11-29 06:52:47,774 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 465 transitions. [2023-11-29 06:52:47,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 465 transitions. [2023-11-29 06:52:47,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:52:47,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 465 transitions. [2023-11-29 06:52:47,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 42.27272727272727) internal successors, (465), 11 states have internal predecessors, (465), 0 states have call successors, (0), 0 states 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 06:52:47,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 06:52:47,778 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states 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 06:52:47,778 INFO L175 Difference]: Start difference. First operand has 106 places, 86 transitions, 496 flow. Second operand 11 states and 465 transitions. [2023-11-29 06:52:47,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 252 transitions, 1839 flow [2023-11-29 06:52:47,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 252 transitions, 1763 flow, removed 24 selfloop flow, removed 3 redundant places. [2023-11-29 06:52:47,805 INFO L231 Difference]: Finished difference. Result has 117 places, 96 transitions, 598 flow [2023-11-29 06:52:47,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=598, PETRI_PLACES=117, PETRI_TRANSITIONS=96} [2023-11-29 06:52:47,805 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 45 predicate places. [2023-11-29 06:52:47,805 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 96 transitions, 598 flow [2023-11-29 06:52:47,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 31.166666666666668) internal successors, (374), 12 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:47,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:52:47,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:47,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:48,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:48,006 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 06:52:48,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:48,007 INFO L85 PathProgramCache]: Analyzing trace with hash 222619261, now seen corresponding path program 1 times [2023-11-29 06:52:48,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:52:48,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846955520] [2023-11-29 06:52:48,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:48,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:52:48,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:52:48,008 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:48,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:52:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:48,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 06:52:48,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:48,140 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 06:52:48,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:48,148 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 06:52:48,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:48,169 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 06:52:48,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:48,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:48,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:48,195 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 06:52:48,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:48,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:48,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:48,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:48,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:48,232 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 06:52:48,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:48,249 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 06:52:48,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:48,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:48,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:48,275 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 06:52:48,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:48,300 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 06:52:48,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:48,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:52:48,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:48,316 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 06:52:48,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:48,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:48,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:48,331 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 06:52:48,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:48,348 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 06:52:48,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:48,355 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 06:52:48,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:48,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:48,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:48,371 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 06:52:48,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:48,388 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 06:52:48,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:48,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:48,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:48,403 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 06:52:48,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:52:48,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:52:48,739 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 06:52:48,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:52:49,585 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 06:52:49,585 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:52:49,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846955520] [2023-11-29 06:52:49,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846955520] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:52:49,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:52:49,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-29 06:52:49,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913268026] [2023-11-29 06:52:49,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:52:49,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:52:49,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:52:49,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:52:49,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:52:52,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 70 [2023-11-29 06:52:52,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 96 transitions, 598 flow. Second operand has 12 states, 12 states have (on average 30.833333333333332) internal successors, (370), 12 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:52,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:52:52,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 70 [2023-11-29 06:52:52,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:52:59,338 INFO L124 PetriNetUnfolderBase]: 21577/32276 cut-off events. [2023-11-29 06:52:59,338 INFO L125 PetriNetUnfolderBase]: For 88200/91035 co-relation queries the response was YES. [2023-11-29 06:52:59,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112161 conditions, 32276 events. 21577/32276 cut-off events. For 88200/91035 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 217117 event pairs, 10067 based on Foata normal form. 1961/33149 useless extension candidates. Maximal degree in co-relation 112128. Up to 6477 conditions per place. [2023-11-29 06:52:59,602 INFO L140 encePairwiseOnDemand]: 61/70 looper letters, 283 selfloop transitions, 34 changer transitions 0/337 dead transitions. [2023-11-29 06:52:59,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 337 transitions, 2759 flow [2023-11-29 06:52:59,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:52:59,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-29 06:52:59,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 570 transitions. [2023-11-29 06:52:59,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2023-11-29 06:52:59,654 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 570 transitions. [2023-11-29 06:52:59,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 570 transitions. [2023-11-29 06:52:59,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:52:59,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 570 transitions. [2023-11-29 06:52:59,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 40.714285714285715) internal successors, (570), 14 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 06:52:59,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 70.0) internal successors, (1050), 15 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states 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 06:52:59,657 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 70.0) internal successors, (1050), 15 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states 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 06:52:59,657 INFO L175 Difference]: Start difference. First operand has 117 places, 96 transitions, 598 flow. Second operand 14 states and 570 transitions. [2023-11-29 06:52:59,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 337 transitions, 2759 flow [2023-11-29 06:52:59,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 337 transitions, 2675 flow, removed 24 selfloop flow, removed 3 redundant places. [2023-11-29 06:52:59,835 INFO L231 Difference]: Finished difference. Result has 129 places, 107 transitions, 688 flow [2023-11-29 06:52:59,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=688, PETRI_PLACES=129, PETRI_TRANSITIONS=107} [2023-11-29 06:52:59,836 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 57 predicate places. [2023-11-29 06:52:59,836 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 107 transitions, 688 flow [2023-11-29 06:52:59,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 30.833333333333332) internal successors, (370), 12 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:52:59,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:52:59,836 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:59,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:53:00,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:53:00,037 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 06:53:00,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:53:00,037 INFO L85 PathProgramCache]: Analyzing trace with hash 621528771, now seen corresponding path program 1 times [2023-11-29 06:53:00,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:53:00,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456331543] [2023-11-29 06:53:00,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:53:00,038 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 06:53:00,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:53:00,039 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:53:00,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:53:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:53:00,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:53:00,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:53:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:53:00,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:53:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:53:00,600 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:53:00,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456331543] [2023-11-29 06:53:00,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456331543] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:53:00,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:53:00,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2023-11-29 06:53:00,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174756019] [2023-11-29 06:53:00,601 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:53:00,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:53:00,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:53:00,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:53:00,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:53:00,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 70 [2023-11-29 06:53:00,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 107 transitions, 688 flow. Second operand has 12 states, 12 states have (on average 31.416666666666668) internal successors, (377), 12 states have internal predecessors, (377), 0 states have call successors, (0), 0 states 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 06:53:00,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:53:00,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 70 [2023-11-29 06:53:00,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:53:05,920 INFO L124 PetriNetUnfolderBase]: 22229/32695 cut-off events. [2023-11-29 06:53:05,920 INFO L125 PetriNetUnfolderBase]: For 91713/94640 co-relation queries the response was YES. [2023-11-29 06:53:06,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121497 conditions, 32695 events. 22229/32695 cut-off events. For 91713/94640 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 211547 event pairs, 13257 based on Foata normal form. 2946/35600 useless extension candidates. Maximal degree in co-relation 121462. Up to 21248 conditions per place. [2023-11-29 06:53:06,185 INFO L140 encePairwiseOnDemand]: 62/70 looper letters, 158 selfloop transitions, 25 changer transitions 0/203 dead transitions. [2023-11-29 06:53:06,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 203 transitions, 1664 flow [2023-11-29 06:53:06,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:53:06,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-29 06:53:06,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 320 transitions. [2023-11-29 06:53:06,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-29 06:53:06,187 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 320 transitions. [2023-11-29 06:53:06,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 320 transitions. [2023-11-29 06:53:06,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:53:06,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 320 transitions. [2023-11-29 06:53:06,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 40.0) internal successors, (320), 8 states have internal predecessors, (320), 0 states have call successors, (0), 0 states 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 06:53:06,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states 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 06:53:06,189 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states 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 06:53:06,189 INFO L175 Difference]: Start difference. First operand has 129 places, 107 transitions, 688 flow. Second operand 8 states and 320 transitions. [2023-11-29 06:53:06,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 203 transitions, 1664 flow [2023-11-29 06:53:06,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 203 transitions, 1654 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 06:53:06,357 INFO L231 Difference]: Finished difference. Result has 131 places, 105 transitions, 727 flow [2023-11-29 06:53:06,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=727, PETRI_PLACES=131, PETRI_TRANSITIONS=105} [2023-11-29 06:53:06,358 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 59 predicate places. [2023-11-29 06:53:06,358 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 105 transitions, 727 flow [2023-11-29 06:53:06,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 31.416666666666668) internal successors, (377), 12 states have internal predecessors, (377), 0 states have call successors, (0), 0 states 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 06:53:06,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:53:06,358 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:53:06,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:53:06,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:53:06,559 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 06:53:06,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:53:06,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1449723715, now seen corresponding path program 2 times [2023-11-29 06:53:06,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:53:06,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520741328] [2023-11-29 06:53:06,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:53:06,560 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 06:53:06,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:53:06,560 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:53:06,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:53:06,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:53:06,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:53:06,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:53:06,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:53:06,711 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 06:53:06,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:06,728 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 06:53:06,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:06,735 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 06:53:06,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:06,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:53:06,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:06,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:53:06,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:06,755 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 06:53:06,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:06,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:53:06,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:06,771 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 06:53:06,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:06,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:53:06,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:06,798 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 06:53:06,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:06,805 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 06:53:06,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:06,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:53:06,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:06,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:53:06,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:06,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:53:06,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:06,847 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 06:53:06,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:06,853 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 06:53:06,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:06,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:53:06,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:06,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:53:06,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:06,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:53:06,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:06,891 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 06:53:06,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:06,910 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 06:53:06,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:06,935 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 06:53:06,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:06,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:53:06,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:06,963 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 06:53:07,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:53:07,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:53:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:53:10,035 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:53:10,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520741328] [2023-11-29 06:53:10,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520741328] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:53:10,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:53:10,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2023-11-29 06:53:10,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638952363] [2023-11-29 06:53:10,035 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:53:10,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:53:10,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:53:10,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:53:10,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:53:18,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 70 [2023-11-29 06:53:18,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 105 transitions, 727 flow. Second operand has 20 states, 20 states have (on average 29.7) internal successors, (594), 20 states have internal predecessors, (594), 0 states have call successors, (0), 0 states 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 06:53:18,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:53:18,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 70 [2023-11-29 06:53:18,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:53:40,400 INFO L124 PetriNetUnfolderBase]: 47625/67141 cut-off events. [2023-11-29 06:53:40,401 INFO L125 PetriNetUnfolderBase]: For 211839/220066 co-relation queries the response was YES. [2023-11-29 06:53:40,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260204 conditions, 67141 events. 47625/67141 cut-off events. For 211839/220066 co-relation queries the response was YES. Maximal size of possible extension queue 1465. Compared 442462 event pairs, 16089 based on Foata normal form. 6327/73420 useless extension candidates. Maximal degree in co-relation 260167. Up to 16257 conditions per place. [2023-11-29 06:53:40,974 INFO L140 encePairwiseOnDemand]: 60/70 looper letters, 503 selfloop transitions, 49 changer transitions 0/571 dead transitions. [2023-11-29 06:53:40,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 571 transitions, 4797 flow [2023-11-29 06:53:40,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 06:53:40,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-29 06:53:40,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 952 transitions. [2023-11-29 06:53:40,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2023-11-29 06:53:40,977 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 952 transitions. [2023-11-29 06:53:40,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 952 transitions. [2023-11-29 06:53:40,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:53:40,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 952 transitions. [2023-11-29 06:53:40,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 39.666666666666664) internal successors, (952), 24 states have internal predecessors, (952), 0 states have call successors, (0), 0 states 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 06:53:40,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 70.0) internal successors, (1750), 25 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states 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 06:53:40,983 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 70.0) internal successors, (1750), 25 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states 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 06:53:40,983 INFO L175 Difference]: Start difference. First operand has 131 places, 105 transitions, 727 flow. Second operand 24 states and 952 transitions. [2023-11-29 06:53:40,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 571 transitions, 4797 flow [2023-11-29 06:53:41,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 571 transitions, 4763 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-11-29 06:53:41,559 INFO L231 Difference]: Finished difference. Result has 155 places, 123 transitions, 937 flow [2023-11-29 06:53:41,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=937, PETRI_PLACES=155, PETRI_TRANSITIONS=123} [2023-11-29 06:53:41,560 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 83 predicate places. [2023-11-29 06:53:41,560 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 123 transitions, 937 flow [2023-11-29 06:53:41,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 29.7) internal successors, (594), 20 states have internal predecessors, (594), 0 states have call successors, (0), 0 states 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 06:53:41,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:53:41,560 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:53:41,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:53:41,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:53:41,761 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 06:53:41,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:53:41,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1617360125, now seen corresponding path program 2 times [2023-11-29 06:53:41,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:53:41,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27749910] [2023-11-29 06:53:41,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:53:41,761 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 06:53:41,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:53:41,762 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:53:41,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:53:41,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 06:53:41,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:53:41,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 06:53:41,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:53:41,870 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 06:53:41,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:41,877 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 06:53:41,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:41,890 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 06:53:41,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:41,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:53:41,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:41,905 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 06:53:41,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:41,910 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 06:53:41,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:41,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:53:41,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:41,932 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 06:53:41,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:41,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:53:41,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:41,945 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 06:53:41,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:41,950 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 06:53:41,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:41,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:53:41,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:41,964 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 06:53:41,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:41,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:53:41,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:41,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:53:41,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:41,987 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 06:53:42,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:42,006 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 06:53:42,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:42,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:53:42,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:42,031 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 06:53:42,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:42,039 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 06:53:42,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:42,067 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 06:53:42,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:42,081 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 06:53:42,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:42,094 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 06:53:42,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:42,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:53:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 06:53:42,361 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:53:42,361 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:53:42,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27749910] [2023-11-29 06:53:42,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [27749910] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:53:42,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:53:42,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:53:42,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740526415] [2023-11-29 06:53:42,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:53:42,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:53:42,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:53:42,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:53:42,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:53:42,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 70 [2023-11-29 06:53:42,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 123 transitions, 937 flow. Second operand has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states 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 06:53:42,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:53:42,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 70 [2023-11-29 06:53:42,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:53:50,941 INFO L124 PetriNetUnfolderBase]: 38039/57258 cut-off events. [2023-11-29 06:53:50,941 INFO L125 PetriNetUnfolderBase]: For 228699/235715 co-relation queries the response was YES. [2023-11-29 06:53:51,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238542 conditions, 57258 events. 38039/57258 cut-off events. For 228699/235715 co-relation queries the response was YES. Maximal size of possible extension queue 1342. Compared 414473 event pairs, 19977 based on Foata normal form. 6140/63034 useless extension candidates. Maximal degree in co-relation 238499. Up to 37965 conditions per place. [2023-11-29 06:53:51,481 INFO L140 encePairwiseOnDemand]: 64/70 looper letters, 109 selfloop transitions, 21 changer transitions 0/153 dead transitions. [2023-11-29 06:53:51,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 153 transitions, 1387 flow [2023-11-29 06:53:51,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:53:51,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 06:53:51,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 196 transitions. [2023-11-29 06:53:51,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2023-11-29 06:53:51,483 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 196 transitions. [2023-11-29 06:53:51,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 196 transitions. [2023-11-29 06:53:51,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:53:51,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 196 transitions. [2023-11-29 06:53:51,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 39.2) internal successors, (196), 5 states have internal predecessors, (196), 0 states have call successors, (0), 0 states 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 06:53:51,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:53:51,484 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 06:53:51,484 INFO L175 Difference]: Start difference. First operand has 155 places, 123 transitions, 937 flow. Second operand 5 states and 196 transitions. [2023-11-29 06:53:51,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 153 transitions, 1387 flow [2023-11-29 06:53:52,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 153 transitions, 1344 flow, removed 9 selfloop flow, removed 10 redundant places. [2023-11-29 06:53:52,513 INFO L231 Difference]: Finished difference. Result has 150 places, 122 transitions, 937 flow [2023-11-29 06:53:52,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=937, PETRI_PLACES=150, PETRI_TRANSITIONS=122} [2023-11-29 06:53:52,513 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 78 predicate places. [2023-11-29 06:53:52,513 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 122 transitions, 937 flow [2023-11-29 06:53:52,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.0) internal successors, (192), 6 states have internal predecessors, (192), 0 states have call successors, (0), 0 states 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 06:53:52,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:53:52,514 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:53:52,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:53:52,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:53:52,714 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 06:53:52,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:53:52,714 INFO L85 PathProgramCache]: Analyzing trace with hash -942273297, now seen corresponding path program 2 times [2023-11-29 06:53:52,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:53:52,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195945832] [2023-11-29 06:53:52,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:53:52,715 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 06:53:52,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:53:52,716 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:53:52,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:53:52,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:53:52,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:53:52,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:53:52,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:53:52,833 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 06:53:52,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:52,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:53:52,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:52,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:53:52,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:52,856 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 06:53:52,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:52,872 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 06:53:52,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:52,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:53:52,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:52,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:53:52,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:52,904 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 06:53:52,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:52,918 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 06:53:52,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:52,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:53:52,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:52,948 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 06:53:52,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:52,962 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 06:53:52,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:52,968 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 06:53:52,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:52,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:53:52,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:52,982 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 06:53:52,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:52,987 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 06:53:53,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:53,002 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 06:53:53,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:53,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:53:53,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:53,019 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 06:53:53,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:53,036 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 06:53:53,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:53,043 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 06:53:53,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:53,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:53:53,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:53,058 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 06:53:53,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:53:53,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:53:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:53:53,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:53:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:53:54,931 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:53:54,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195945832] [2023-11-29 06:53:54,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195945832] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:53:54,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:53:54,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2023-11-29 06:53:54,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599776694] [2023-11-29 06:53:54,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:53:54,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:53:54,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:53:54,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:53:54,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:54:02,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 70 [2023-11-29 06:54:02,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 122 transitions, 937 flow. Second operand has 18 states, 18 states have (on average 31.666666666666668) internal successors, (570), 18 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 06:54:02,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:54:02,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 70 [2023-11-29 06:54:02,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:54:16,565 INFO L124 PetriNetUnfolderBase]: 37387/55578 cut-off events. [2023-11-29 06:54:16,565 INFO L125 PetriNetUnfolderBase]: For 216719/223963 co-relation queries the response was YES. [2023-11-29 06:54:16,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232419 conditions, 55578 events. 37387/55578 cut-off events. For 216719/223963 co-relation queries the response was YES. Maximal size of possible extension queue 1230. Compared 389557 event pairs, 12708 based on Foata normal form. 4226/59713 useless extension candidates. Maximal degree in co-relation 232374. Up to 15872 conditions per place. [2023-11-29 06:54:17,277 INFO L140 encePairwiseOnDemand]: 59/70 looper letters, 520 selfloop transitions, 52 changer transitions 0/595 dead transitions. [2023-11-29 06:54:17,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 595 transitions, 5303 flow [2023-11-29 06:54:17,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 06:54:17,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 06:54:17,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 925 transitions. [2023-11-29 06:54:17,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2023-11-29 06:54:17,280 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 925 transitions. [2023-11-29 06:54:17,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 925 transitions. [2023-11-29 06:54:17,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:54:17,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 925 transitions. [2023-11-29 06:54:17,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 44.04761904761905) internal successors, (925), 21 states have internal predecessors, (925), 0 states have call successors, (0), 0 states 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 06:54:17,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 70.0) internal successors, (1540), 22 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states 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 06:54:17,284 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 70.0) internal successors, (1540), 22 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states 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 06:54:17,284 INFO L175 Difference]: Start difference. First operand has 150 places, 122 transitions, 937 flow. Second operand 21 states and 925 transitions. [2023-11-29 06:54:17,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 595 transitions, 5303 flow [2023-11-29 06:54:17,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 595 transitions, 5225 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 06:54:17,837 INFO L231 Difference]: Finished difference. Result has 171 places, 147 transitions, 1212 flow [2023-11-29 06:54:17,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1212, PETRI_PLACES=171, PETRI_TRANSITIONS=147} [2023-11-29 06:54:17,837 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 99 predicate places. [2023-11-29 06:54:17,837 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 147 transitions, 1212 flow [2023-11-29 06:54:17,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 31.666666666666668) internal successors, (570), 18 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 06:54:17,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:54:17,838 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2023-11-29 06:54:17,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:54:18,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:54:18,038 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 06:54:18,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:54:18,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1683057788, now seen corresponding path program 3 times [2023-11-29 06:54:18,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:54:18,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1425480881] [2023-11-29 06:54:18,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:54:18,039 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 06:54:18,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:54:18,040 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:54:18,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:54:18,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 06:54:18,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:54:18,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:54:18,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:54:18,339 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 06:54:18,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:54:18,349 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 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:54:18,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:54:18,364 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 06:54:18,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:54:18,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:54:18,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:54:18,376 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 06:54:18,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:54:18,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:54:18,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:54:18,389 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 06:54:18,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:54:18,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:54:18,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:54:18,402 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 06:54:18,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:54:18,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:54:18,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:54:18,426 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 06:54:18,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:54:18,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:54:18,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:54:18,439 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 06:54:18,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:54:18,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:54:18,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:54:18,451 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 06:54:18,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:54:18,457 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 06:54:18,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:54:18,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:54:18,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:54:18,479 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 06:54:18,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:54:18,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:54:18,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:54:18,506 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 06:54:18,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:54:18,523 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 06:54:18,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:54:18,545 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 06:54:18,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:54:18,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:54:18,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:54:18,567 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 06:54:19,106 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 06:54:19,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:54:21,984 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 06:54:21,984 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:54:21,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1425480881] [2023-11-29 06:54:21,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1425480881] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:54:21,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:54:21,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-11-29 06:54:21,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854842472] [2023-11-29 06:54:21,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:54:21,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 06:54:21,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:54:21,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 06:54:21,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2023-11-29 06:54:31,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 70 [2023-11-29 06:54:31,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 147 transitions, 1212 flow. Second operand has 26 states, 26 states have (on average 30.76923076923077) internal successors, (800), 26 states have internal predecessors, (800), 0 states have call successors, (0), 0 states 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 06:54:31,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:54:31,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 70 [2023-11-29 06:54:31,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:55:09,441 INFO L124 PetriNetUnfolderBase]: 37399/56333 cut-off events. [2023-11-29 06:55:09,441 INFO L125 PetriNetUnfolderBase]: For 286590/292664 co-relation queries the response was YES. [2023-11-29 06:55:09,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255687 conditions, 56333 events. 37399/56333 cut-off events. For 286590/292664 co-relation queries the response was YES. Maximal size of possible extension queue 1259. Compared 403125 event pairs, 26960 based on Foata normal form. 4062/60000 useless extension candidates. Maximal degree in co-relation 255638. Up to 50283 conditions per place. [2023-11-29 06:55:10,035 INFO L140 encePairwiseOnDemand]: 65/70 looper letters, 95 selfloop transitions, 66 changer transitions 0/183 dead transitions. [2023-11-29 06:55:10,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 183 transitions, 1990 flow [2023-11-29 06:55:10,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 06:55:10,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-29 06:55:10,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 1441 transitions. [2023-11-29 06:55:10,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4475155279503106 [2023-11-29 06:55:10,039 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 1441 transitions. [2023-11-29 06:55:10,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 1441 transitions. [2023-11-29 06:55:10,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:55:10,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 1441 transitions. [2023-11-29 06:55:10,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 31.32608695652174) internal successors, (1441), 46 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states 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 06:55:10,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 70.0) internal successors, (3290), 47 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states 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 06:55:10,045 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 70.0) internal successors, (3290), 47 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states 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 06:55:10,045 INFO L175 Difference]: Start difference. First operand has 171 places, 147 transitions, 1212 flow. Second operand 46 states and 1441 transitions. [2023-11-29 06:55:10,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 183 transitions, 1990 flow [2023-11-29 06:55:10,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 183 transitions, 1927 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-11-29 06:55:10,654 INFO L231 Difference]: Finished difference. Result has 224 places, 183 transitions, 1791 flow [2023-11-29 06:55:10,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1791, PETRI_PLACES=224, PETRI_TRANSITIONS=183} [2023-11-29 06:55:10,655 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 152 predicate places. [2023-11-29 06:55:10,655 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 183 transitions, 1791 flow [2023-11-29 06:55:10,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 30.76923076923077) internal successors, (800), 26 states have internal predecessors, (800), 0 states have call successors, (0), 0 states 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 06:55:10,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:10,655 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:10,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:55:10,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:55:10,856 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 06:55:10,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:10,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1690205253, now seen corresponding path program 2 times [2023-11-29 06:55:10,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:55:10,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733460306] [2023-11-29 06:55:10,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 06:55:10,856 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 06:55:10,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:55:10,857 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:55:10,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:55:10,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 06:55:10,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:55:10,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:55:10,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:11,005 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 06:55:11,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:11,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:55:11,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:11,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:55:11,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:11,038 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 06:55:11,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:11,053 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 06:55:11,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:11,075 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 06:55:11,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:11,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:55:11,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:11,098 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 06:55:11,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:11,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:55:11,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:11,110 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 06:55:11,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:11,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:55:11,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:11,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:55:11,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:11,129 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 06:55:11,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:11,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:55:11,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:11,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:55:11,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:11,149 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 06:55:11,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:11,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:55:11,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:11,171 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 06:55:11,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:11,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:55:11,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:11,185 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 06:55:11,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:11,199 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 06:55:11,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:11,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:55:11,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:11,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:55:11,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:11,219 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 06:55:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:55:11,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:55:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 06:55:13,295 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:55:13,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733460306] [2023-11-29 06:55:13,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733460306] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:55:13,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:55:13,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2023-11-29 06:55:13,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264825161] [2023-11-29 06:55:13,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:55:13,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:55:13,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:55:13,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:55:13,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:55:19,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 70 [2023-11-29 06:55:19,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 183 transitions, 1791 flow. Second operand has 18 states, 18 states have (on average 31.88888888888889) internal successors, (574), 18 states have internal predecessors, (574), 0 states have call successors, (0), 0 states 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 06:55:19,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:55:19,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 70 [2023-11-29 06:55:19,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:55:35,701 INFO L124 PetriNetUnfolderBase]: 39370/58238 cut-off events. [2023-11-29 06:55:35,701 INFO L125 PetriNetUnfolderBase]: For 304386/312807 co-relation queries the response was YES. [2023-11-29 06:55:36,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264204 conditions, 58238 events. 39370/58238 cut-off events. For 304386/312807 co-relation queries the response was YES. Maximal size of possible extension queue 1275. Compared 405297 event pairs, 11548 based on Foata normal form. 4545/62616 useless extension candidates. Maximal degree in co-relation 264142. Up to 15296 conditions per place. [2023-11-29 06:55:36,367 INFO L140 encePairwiseOnDemand]: 59/70 looper letters, 527 selfloop transitions, 80 changer transitions 0/630 dead transitions. [2023-11-29 06:55:36,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 630 transitions, 6413 flow [2023-11-29 06:55:36,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 06:55:36,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-29 06:55:36,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 911 transitions. [2023-11-29 06:55:36,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6197278911564625 [2023-11-29 06:55:36,370 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 911 transitions. [2023-11-29 06:55:36,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 911 transitions. [2023-11-29 06:55:36,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:55:36,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 911 transitions. [2023-11-29 06:55:36,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 43.38095238095238) internal successors, (911), 21 states have internal predecessors, (911), 0 states have call successors, (0), 0 states 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 06:55:36,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 70.0) internal successors, (1540), 22 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states 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 06:55:36,373 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 70.0) internal successors, (1540), 22 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states 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 06:55:36,373 INFO L175 Difference]: Start difference. First operand has 224 places, 183 transitions, 1791 flow. Second operand 21 states and 911 transitions. [2023-11-29 06:55:36,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 630 transitions, 6413 flow [2023-11-29 06:55:37,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 630 transitions, 6251 flow, removed 51 selfloop flow, removed 21 redundant places. [2023-11-29 06:55:37,400 INFO L231 Difference]: Finished difference. Result has 227 places, 210 transitions, 2025 flow [2023-11-29 06:55:37,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2025, PETRI_PLACES=227, PETRI_TRANSITIONS=210} [2023-11-29 06:55:37,401 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 155 predicate places. [2023-11-29 06:55:37,401 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 210 transitions, 2025 flow [2023-11-29 06:55:37,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 31.88888888888889) internal successors, (574), 18 states have internal predecessors, (574), 0 states have call successors, (0), 0 states 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 06:55:37,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:55:37,401 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:55:37,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2023-11-29 06:55:37,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:55:37,601 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 06:55:37,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:37,602 INFO L85 PathProgramCache]: Analyzing trace with hash -643516483, now seen corresponding path program 3 times [2023-11-29 06:55:37,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:55:37,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18188947] [2023-11-29 06:55:37,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:55:37,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 06:55:37,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:55:37,603 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:55:37,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:55:37,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 06:55:37,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:55:37,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 06:55:37,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:37,816 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 06:55:37,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:37,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:55:37,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:37,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:55:37,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:37,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 06:55:37,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:37,879 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 06:55:37,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:37,895 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 06:55:37,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:37,901 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:55:37,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:37,908 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 06:55:37,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:37,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:55:37,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:37,929 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 06:55:37,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:37,936 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 06:55:37,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:37,941 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 06:55:37,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:37,960 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 06:55:37,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:37,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:55:37,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:37,974 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 06:55:37,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:37,982 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 06:55:37,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:37,988 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 06:55:37,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:37,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:55:38,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:38,005 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 06:55:38,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:38,010 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 06:55:38,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:38,025 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 06:55:38,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:38,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:55:38,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:38,039 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 06:55:38,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:55:38,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:55:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 06:55:38,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:55:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 06:55:43,186 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:55:43,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18188947] [2023-11-29 06:55:43,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18188947] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:55:43,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:55:43,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 16 [2023-11-29 06:55:43,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670805340] [2023-11-29 06:55:43,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:55:43,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:55:43,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:55:43,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:55:43,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:55:49,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 70 [2023-11-29 06:55:49,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 210 transitions, 2025 flow. Second operand has 18 states, 18 states have (on average 31.0) internal successors, (558), 18 states have internal predecessors, (558), 0 states have call successors, (0), 0 states 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 06:55:49,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:55:49,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 70 [2023-11-29 06:55:49,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:56:06,302 INFO L124 PetriNetUnfolderBase]: 58065/80494 cut-off events. [2023-11-29 06:56:06,302 INFO L125 PetriNetUnfolderBase]: For 561781/574656 co-relation queries the response was YES. [2023-11-29 06:56:06,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401553 conditions, 80494 events. 58065/80494 cut-off events. For 561781/574656 co-relation queries the response was YES. Maximal size of possible extension queue 1609. Compared 522465 event pairs, 8943 based on Foata normal form. 7401/87844 useless extension candidates. Maximal degree in co-relation 401487. Up to 19503 conditions per place. [2023-11-29 06:56:07,586 INFO L140 encePairwiseOnDemand]: 63/70 looper letters, 495 selfloop transitions, 53 changer transitions 0/568 dead transitions. [2023-11-29 06:56:07,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 568 transitions, 6387 flow [2023-11-29 06:56:07,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:56:07,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 06:56:07,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 364 transitions. [2023-11-29 06:56:07,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2023-11-29 06:56:07,589 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 364 transitions. [2023-11-29 06:56:07,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 364 transitions. [2023-11-29 06:56:07,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 06:56:07,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 364 transitions. [2023-11-29 06:56:07,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 40.44444444444444) internal successors, (364), 9 states have internal predecessors, (364), 0 states have call successors, (0), 0 states 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 06:56:07,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states 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 06:56:07,592 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states 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 06:56:07,592 INFO L175 Difference]: Start difference. First operand has 227 places, 210 transitions, 2025 flow. Second operand 9 states and 364 transitions. [2023-11-29 06:56:07,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 568 transitions, 6387 flow [2023-11-29 06:56:09,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 568 transitions, 6133 flow, removed 96 selfloop flow, removed 7 redundant places. [2023-11-29 06:56:09,686 INFO L231 Difference]: Finished difference. Result has 227 places, 218 transitions, 2088 flow [2023-11-29 06:56:09,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1915, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2088, PETRI_PLACES=227, PETRI_TRANSITIONS=218} [2023-11-29 06:56:09,686 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 155 predicate places. [2023-11-29 06:56:09,686 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 218 transitions, 2088 flow [2023-11-29 06:56:09,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 31.0) internal successors, (558), 18 states have internal predecessors, (558), 0 states have call successors, (0), 0 states 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 06:56:09,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 06:56:09,687 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-29 06:56:09,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:56:09,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:56:09,887 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 06:56:09,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:56:09,887 INFO L85 PathProgramCache]: Analyzing trace with hash 534728127, now seen corresponding path program 3 times [2023-11-29 06:56:09,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 06:56:09,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071250097] [2023-11-29 06:56:09,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 06:56:09,888 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 06:56:09,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 06:56:09,889 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:56:09,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 06:56:10,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-29 06:56:10,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 06:56:10,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 06:56:10,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:56:10,155 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 06:56:10,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:56:10,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:56:10,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:56:10,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 06:56:10,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:56:10,196 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 06:56:10,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:56:10,214 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 06:56:10,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:56:10,234 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 06:56:10,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:56:10,241 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 06:56:10,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:56:10,247 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 06:56:10,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:56:10,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:56:10,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:56:10,268 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 06:56:10,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:56:10,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 06:56:10,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:56:10,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:56:10,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:56:10,287 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 06:56:10,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:56:10,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:56:10,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:56:10,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:56:10,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:56:10,309 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 06:56:10,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:56:10,325 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 06:56:10,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:56:10,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:56:10,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:56:10,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:56:10,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:56:10,347 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 06:56:10,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:56:10,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 06:56:10,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:56:10,373 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 06:56:10,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:56:10,379 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 06:56:10,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 06:56:10,387 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 06:56:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 06:56:11,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:56:25,739 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-29 06:56:25,739 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 06:56:25,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071250097] [2023-11-29 06:56:25,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071250097] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:56:25,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:56:25,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2023-11-29 06:56:25,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102679377] [2023-11-29 06:56:25,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:56:25,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:56:25,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 06:56:25,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:56:25,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=309, Unknown=1, NotChecked=0, Total=380 [2023-11-29 06:56:30,590 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 [1] [2023-11-29 06:56:35,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:56:40,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:56:45,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:56:49,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:56:53,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:56:58,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:57:02,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:57:05,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:57:10,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:57:15,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:57:20,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:57:23,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:57:26,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:57:32,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:57:34,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:57:38,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:57:40,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 70 [2023-11-29 06:57:40,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 218 transitions, 2088 flow. Second operand has 20 states, 20 states have (on average 20.2) internal successors, (404), 20 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 06:57:40,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 06:57:40,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 70 [2023-11-29 06:57:40,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 06:57:45,564 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse7 (bvmul c_thread1Thread1of1ForFork1_~i~0 (_ bv4 32)))) (let ((.cse5 (bvadd c_~A~0.offset .cse7 (_ bv12 32))) (.cse4 (bvadd (_ bv8 32) c_~A~0.offset .cse7)) (.cse1 (select |c_#length| c_~A~0.base))) (let ((.cse8 (not (bvule .cse4 .cse1))) (.cse9 (bvule .cse5 .cse1)) (.cse3 (bvadd (_ bv4 32) c_~A~0.offset .cse7))) (and (forall ((thread1Thread1of1ForFork1_~i~0 (_ BitVec 32))) (let ((.cse2 (bvmul thread1Thread1of1ForFork1_~i~0 (_ bv4 32)))) (let ((.cse0 (bvadd .cse2 c_~A~0.offset (_ bv12 32)))) (or (not (bvule .cse0 .cse1)) (bvule .cse0 (bvadd (_ bv16 32) .cse2 c_~A~0.offset)))))) (or (not (bvule .cse3 .cse4)) (let ((.cse6 (bvadd (_ bv16 32) c_~A~0.offset .cse7))) (and (bvule .cse5 .cse6) (bvule .cse6 .cse1))) .cse8 (not .cse9)) (forall ((thread1Thread1of1ForFork1_~i~0 (_ BitVec 32))) (let ((.cse10 (bvmul thread1Thread1of1ForFork1_~i~0 (_ bv4 32)))) (let ((.cse11 (bvadd (_ bv4 32) .cse10 c_~A~0.offset))) (or (bvule (bvadd (_ bv16 32) .cse10 c_~A~0.offset) .cse1) (not (bvule .cse11 .cse1)) (not (bvule (bvadd .cse10 c_~A~0.offset) .cse11)) (not (bvule (bvadd .cse10 c_~A~0.offset (_ bv12 32)) .cse1)))))) (or (not (bvule (bvadd c_~A~0.offset .cse7) .cse3)) .cse8 (and .cse9 (bvule .cse4 .cse5)) (not (bvule .cse3 .cse1))))))) is different from false [2023-11-29 06:57:49,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:57:54,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:57:58,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:58:03,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:58:07,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:58:12,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:58:16,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:58:21,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:58:25,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:58:29,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:58:33,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:58:37,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:58:41,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:58:46,389 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (bvmul c_thread1Thread1of1ForFork1_~i~0 (_ bv4 32)))) (let ((.cse3 (bvadd (_ bv4 32) c_~A~0.offset .cse4)) (.cse1 (select |c_#length| c_~A~0.base))) (and (forall ((thread1Thread1of1ForFork1_~i~0 (_ BitVec 32))) (let ((.cse2 (bvmul thread1Thread1of1ForFork1_~i~0 (_ bv4 32)))) (let ((.cse0 (bvadd .cse2 c_~A~0.offset (_ bv12 32)))) (or (not (bvule .cse0 .cse1)) (bvule .cse0 (bvadd (_ bv16 32) .cse2 c_~A~0.offset)))))) (bvule .cse3 .cse1) (bvule (bvadd c_~A~0.offset .cse4) .cse3) (let ((.cse5 (bvadd (_ bv8 32) c_~A~0.offset .cse4)) (.cse6 (bvadd c_~A~0.offset .cse4 (_ bv12 32)))) (or (not (bvule .cse3 .cse5)) (let ((.cse7 (bvadd (_ bv16 32) c_~A~0.offset .cse4))) (and (bvule .cse6 .cse7) (bvule .cse7 .cse1))) (not (bvule .cse5 .cse1)) (not (bvule .cse6 .cse1)))) (forall ((thread1Thread1of1ForFork1_~i~0 (_ BitVec 32))) (let ((.cse8 (bvmul thread1Thread1of1ForFork1_~i~0 (_ bv4 32)))) (let ((.cse9 (bvadd (_ bv4 32) .cse8 c_~A~0.offset))) (or (bvule (bvadd (_ bv16 32) .cse8 c_~A~0.offset) .cse1) (not (bvule .cse9 .cse1)) (not (bvule (bvadd .cse8 c_~A~0.offset) .cse9)) (not (bvule (bvadd .cse8 c_~A~0.offset (_ bv12 32)) .cse1))))))))) is different from false [2023-11-29 06:58:50,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:58:52,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:58:56,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:59:00,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:59:04,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:59:08,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:59:30,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:59:34,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:59:39,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:59:41,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:59:45,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:59:49,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:59:53,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:59:54,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 06:59:59,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:00:03,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:00:07,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:00:11,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:00:16,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:00:20,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:00:24,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 07:00:28,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:00:30,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:00:35,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:00:39,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:00:43,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:00:49,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:00:53,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:00:57,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:01:01,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:01:05,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:01:09,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:01:14,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:01:18,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:01:23,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:01:28,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:01:32,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:01:36,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:01:40,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 07:01:42,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:01:47,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:01:49,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:01:54,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:01:56,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:02:00,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:02:04,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:02:08,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 07:02:12,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:02:16,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 07:02:20,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:02:23,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:02:26,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:02:30,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:02:34,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:02:35,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:02:39,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 07:02:43,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:02:47,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 07:02:51,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:02:56,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:02:59,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:03:03,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:03:07,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:03:12,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:03:17,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:03:18,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:03:23,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:03:27,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:03:31,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:03:32,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 07:03:36,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:03:38,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:03:43,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:03:44,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:03:48,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:03:53,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:03:57,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:04:01,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:04:05,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:04:09,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:04:13,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:04:18,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:04:22,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-29 07:04:27,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:04:31,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:04:34,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:04:39,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:04:43,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:04:44,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:04:49,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:04:53,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:04:57,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:05:02,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:05:08,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:05:12,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:05:16,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:05:22,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:05:28,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:05:32,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:05:36,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:05:41,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:05:45,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:05:49,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-29 07:06:03,571 INFO L124 PetriNetUnfolderBase]: 82316/116945 cut-off events. [2023-11-29 07:06:03,571 INFO L125 PetriNetUnfolderBase]: For 554077/560083 co-relation queries the response was YES. [2023-11-29 07:06:04,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 542401 conditions, 116945 events. 82316/116945 cut-off events. For 554077/560083 co-relation queries the response was YES. Maximal size of possible extension queue 2091. Compared 800462 event pairs, 39903 based on Foata normal form. 3789/120589 useless extension candidates. Maximal degree in co-relation 542337. Up to 65018 conditions per place. [2023-11-29 07:06:04,949 INFO L140 encePairwiseOnDemand]: 44/70 looper letters, 453 selfloop transitions, 94 changer transitions 1/562 dead transitions. [2023-11-29 07:06:04,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 562 transitions, 5681 flow [2023-11-29 07:06:04,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 07:06:04,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-29 07:06:04,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 516 transitions. [2023-11-29 07:06:04,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2023-11-29 07:06:04,952 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 516 transitions. [2023-11-29 07:06:04,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 516 transitions. [2023-11-29 07:06:04,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 07:06:04,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 516 transitions. [2023-11-29 07:06:04,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 32.25) internal successors, (516), 16 states have internal predecessors, (516), 0 states have call successors, (0), 0 states 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 07:06:04,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 70.0) internal successors, (1190), 17 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states 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 07:06:04,955 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 70.0) internal successors, (1190), 17 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states 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 07:06:04,955 INFO L175 Difference]: Start difference. First operand has 227 places, 218 transitions, 2088 flow. Second operand 16 states and 516 transitions. [2023-11-29 07:06:04,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 562 transitions, 5681 flow [2023-11-29 07:06:08,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 562 transitions, 5442 flow, removed 23 selfloop flow, removed 6 redundant places. [2023-11-29 07:06:08,592 INFO L231 Difference]: Finished difference. Result has 243 places, 245 transitions, 2490 flow [2023-11-29 07:06:08,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1978, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2490, PETRI_PLACES=243, PETRI_TRANSITIONS=245} [2023-11-29 07:06:08,593 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 171 predicate places. [2023-11-29 07:06:08,593 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 245 transitions, 2490 flow [2023-11-29 07:06:08,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 20.2) internal successors, (404), 20 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 07:06:08,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 07:06:08,593 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-29 07:06:08,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 07:06:08,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 07:06:08,794 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2023-11-29 07:06:08,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:06:08,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1009566865, now seen corresponding path program 4 times [2023-11-29 07:06:08,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 07:06:08,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615433012] [2023-11-29 07:06:08,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 07:06:08,795 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 07:06:08,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 07:06:08,796 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 07:06:08,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c43e682-f3d1-43d9-a753-1ed3034625ae/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 07:06:08,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 07:06:08,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 07:06:08,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 07:06:08,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:06:08,939 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 07:06:08,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:06:08,962 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 07:06:08,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:06:08,987 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 07:06:09,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:06:09,003 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 07:06:09,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:06:09,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 07:06:09,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:06:09,076 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 07:06:09,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:06:09,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 07:06:09,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:06:09,120 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 07:06:09,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:06:09,138 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 07:06:09,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:06:09,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 07:06:09,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:06:09,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 07:06:09,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:06:09,240 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 07:06:09,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:06:09,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 07:06:09,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:06:09,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-29 07:06:09,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:06:09,367 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 07:06:09,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:06:09,446 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 07:06:09,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:06:09,495 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 07:06:09,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:06:09,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 07:06:09,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:06:09,572 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 07:06:09,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:06:09,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 07:06:09,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:06:09,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-29 07:06:09,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:06:09,641 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 07:06:09,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:06:09,657 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 07:06:09,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 07:06:09,683 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 07:06:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 07:06:11,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:06:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-29 07:06:15,006 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 07:06:15,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615433012] [2023-11-29 07:06:15,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [615433012] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:06:15,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:06:15,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2023-11-29 07:06:15,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411416579] [2023-11-29 07:06:15,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:06:15,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 07:06:15,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 07:06:15,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 07:06:15,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380