./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b 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_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:42:29,067 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:42:29,134 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:42:29,140 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:42:29,140 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:42:29,167 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:42:29,168 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:42:29,169 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:42:29,170 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:42:29,170 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:42:29,171 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:42:29,172 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:42:29,172 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:42:29,173 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:42:29,174 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:42:29,174 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:42:29,175 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:42:29,176 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:42:29,176 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:42:29,177 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:42:29,183 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:42:29,184 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:42:29,184 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:42:29,186 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:42:29,191 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:42:29,192 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:42:29,192 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:42:29,193 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:42:29,193 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:42:29,194 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:42:29,195 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:42:29,196 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:42:29,196 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:42:29,196 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:42:29,196 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:42:29,197 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:42:29,197 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:42:29,197 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:42:29,197 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_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a [2023-11-06 22:42:29,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:42:29,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:42:29,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:42:29,566 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:42:29,567 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:42:29,569 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2023-11-06 22:42:32,750 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:42:32,989 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:42:32,990 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2023-11-06 22:42:32,998 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/data/8503bb9c3/b4776ee9efbd4a64852674f6fc6fd837/FLAG01ab3bc4e [2023-11-06 22:42:33,012 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/data/8503bb9c3/b4776ee9efbd4a64852674f6fc6fd837 [2023-11-06 22:42:33,015 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:42:33,017 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:42:33,019 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:42:33,019 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:42:33,036 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:42:33,037 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:33" (1/1) ... [2023-11-06 22:42:33,039 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ad85e7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:33, skipping insertion in model container [2023-11-06 22:42:33,041 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:33" (1/1) ... [2023-11-06 22:42:33,076 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:42:33,304 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:42:33,319 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-06 22:42:33,321 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@234708a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:33, skipping insertion in model container [2023-11-06 22:42:33,321 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:42:33,322 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 22:42:33,324 INFO L158 Benchmark]: Toolchain (without parser) took 305.85ms. Allocated memory is still 148.9MB. Free memory was 106.7MB in the beginning and 115.4MB in the end (delta: -8.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-06 22:42:33,325 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 111.1MB. Free memory is still 79.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:42:33,325 INFO L158 Benchmark]: CACSL2BoogieTranslator took 302.99ms. Allocated memory is still 148.9MB. Free memory was 106.7MB in the beginning and 115.4MB in the end (delta: -8.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-06 22:42:33,327 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 111.1MB. Free memory is still 79.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 302.99ms. Allocated memory is still 148.9MB. Free memory was 106.7MB in the beginning and 115.4MB in the end (delta: -8.7MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 116]: 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_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:42:35,815 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:42:35,954 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-06 22:42:35,963 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:42:35,964 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:42:36,012 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:42:36,013 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:42:36,014 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:42:36,015 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:42:36,020 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:42:36,021 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:42:36,021 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:42:36,022 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:42:36,024 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:42:36,024 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:42:36,025 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:42:36,025 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:42:36,026 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:42:36,026 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:42:36,026 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:42:36,027 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:42:36,031 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:42:36,031 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:42:36,032 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 22:42:36,032 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 22:42:36,032 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:42:36,033 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:42:36,033 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:42:36,034 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:42:36,035 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:42:36,036 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:42:36,036 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:42:36,037 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:42:36,037 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:42:36,037 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 22:42:36,038 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 22:42:36,038 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:42:36,038 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:42:36,038 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:42:36,039 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 22:42:36,040 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:42:36,040 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_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd94157895dc71e9f24fce5dbc4a71d4e4b55c4da9be28372139a3001decae0a [2023-11-06 22:42:36,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:42:36,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:42:36,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:42:36,502 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:42:36,502 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:42:36,504 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2023-11-06 22:42:39,603 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:42:39,900 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:42:39,901 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/sv-benchmarks/c/weaver/popl20-more-inc-subseq.wvr.c [2023-11-06 22:42:39,912 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/data/196b0f741/1d3e97b3cc494cc98285960277dfe445/FLAGaf2b9c581 [2023-11-06 22:42:39,932 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/data/196b0f741/1d3e97b3cc494cc98285960277dfe445 [2023-11-06 22:42:39,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:42:39,939 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:42:39,943 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:42:39,943 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:42:39,949 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:42:39,950 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:39" (1/1) ... [2023-11-06 22:42:39,951 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@780ac96d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:39, skipping insertion in model container [2023-11-06 22:42:39,951 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:42:39" (1/1) ... [2023-11-06 22:42:39,988 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:42:40,243 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:42:40,258 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 22:42:40,263 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:42:40,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:42:40,288 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:42:40,324 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:42:40,342 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:42:40,343 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:42:40,351 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:42:40,351 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:40 WrapperNode [2023-11-06 22:42:40,351 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:42:40,352 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:42:40,353 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:42:40,353 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:42:40,361 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:40" (1/1) ... [2023-11-06 22:42:40,373 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:40" (1/1) ... [2023-11-06 22:42:40,405 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 12, calls inlined = 14, statements flattened = 194 [2023-11-06 22:42:40,406 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:42:40,407 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:42:40,407 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:42:40,407 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:42:40,422 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:40" (1/1) ... [2023-11-06 22:42:40,423 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:40" (1/1) ... [2023-11-06 22:42:40,428 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:40" (1/1) ... [2023-11-06 22:42:40,428 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:40" (1/1) ... [2023-11-06 22:42:40,456 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:40" (1/1) ... [2023-11-06 22:42:40,461 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:40" (1/1) ... [2023-11-06 22:42:40,464 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:40" (1/1) ... [2023-11-06 22:42:40,471 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:40" (1/1) ... [2023-11-06 22:42:40,483 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:42:40,484 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:42:40,485 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:42:40,485 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:42:40,486 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:40" (1/1) ... [2023-11-06 22:42:40,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:42:40,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:42:40,525 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:42:40,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:42:40,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:42:40,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 22:42:40,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:42:40,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 22:42:40,565 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:42:40,565 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:42:40,566 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:42:40,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:42:40,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:42:40,568 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:42:40,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:42:40,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:42:40,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:42:40,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:42:40,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 22:42:40,572 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:42:40,805 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:42:40,807 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:42:41,379 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:42:41,518 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:42:41,518 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 22:42:41,521 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:41 BoogieIcfgContainer [2023-11-06 22:42:41,521 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:42:41,524 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:42:41,524 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:42:41,528 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:42:41,528 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:42:39" (1/3) ... [2023-11-06 22:42:41,529 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3ce2ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:41, skipping insertion in model container [2023-11-06 22:42:41,529 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:42:40" (2/3) ... [2023-11-06 22:42:41,530 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3ce2ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:42:41, skipping insertion in model container [2023-11-06 22:42:41,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:42:41" (3/3) ... [2023-11-06 22:42:41,532 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-inc-subseq.wvr.c [2023-11-06 22:42:41,552 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:42:41,553 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-06 22:42:41,553 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:42:41,646 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:42:41,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 218 transitions, 450 flow [2023-11-06 22:42:41,831 INFO L124 PetriNetUnfolderBase]: 15/216 cut-off events. [2023-11-06 22:42:41,831 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:42:41,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 216 events. 15/216 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 219 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 169. Up to 2 conditions per place. [2023-11-06 22:42:41,838 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 218 transitions, 450 flow [2023-11-06 22:42:41,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 211 transitions, 434 flow [2023-11-06 22:42:41,854 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:42:41,870 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 211 transitions, 434 flow [2023-11-06 22:42:41,874 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 211 transitions, 434 flow [2023-11-06 22:42:41,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 211 transitions, 434 flow [2023-11-06 22:42:41,952 INFO L124 PetriNetUnfolderBase]: 15/211 cut-off events. [2023-11-06 22:42:41,953 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:42:41,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 211 events. 15/211 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 217 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 169. Up to 2 conditions per place. [2023-11-06 22:42:41,958 INFO L119 LiptonReduction]: Number of co-enabled transitions 1390 [2023-11-06 22:43:12,932 INFO L134 LiptonReduction]: Checked pairs total: 3450 [2023-11-06 22:43:12,932 INFO L136 LiptonReduction]: Total number of compositions: 235 [2023-11-06 22:43:12,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:43:12,955 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;@5a2f10e5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:43:12,955 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-11-06 22:43:12,959 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:43:12,959 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-11-06 22:43:12,959 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:43:12,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:12,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:43:12,961 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:43:12,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:12,966 INFO L85 PathProgramCache]: Analyzing trace with hash 28633, now seen corresponding path program 1 times [2023-11-06 22:43:12,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:12,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1374185654] [2023-11-06 22:43:12,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:12,980 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:12,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:12,990 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:43:13,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-06 22:43:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:13,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:43:13,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:13,245 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 22:43:13,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:13,260 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:43:13,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:13,278 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:43:13,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:13,299 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:43:13,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:13,315 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:43:13,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:13,323 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:43:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:13,353 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:13,354 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:13,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1374185654] [2023-11-06 22:43:13,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1374185654] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:13,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:13,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:43:13,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443778457] [2023-11-06 22:43:13,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:13,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:43:13,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:13,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:43:13,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:43:13,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 453 [2023-11-06 22:43:13,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:13,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:13,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 453 [2023-11-06 22:43:13,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:14,339 INFO L124 PetriNetUnfolderBase]: 707/1084 cut-off events. [2023-11-06 22:43:14,340 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-06 22:43:14,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2197 conditions, 1084 events. 707/1084 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 5243 event pairs, 463 based on Foata normal form. 0/374 useless extension candidates. Maximal degree in co-relation 2018. Up to 1072 conditions per place. [2023-11-06 22:43:14,355 INFO L140 encePairwiseOnDemand]: 439/453 looper letters, 46 selfloop transitions, 6 changer transitions 0/53 dead transitions. [2023-11-06 22:43:14,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 53 transitions, 222 flow [2023-11-06 22:43:14,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:43:14,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:43:14,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 600 transitions. [2023-11-06 22:43:14,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44150110375275936 [2023-11-06 22:43:14,378 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 600 transitions. [2023-11-06 22:43:14,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 600 transitions. [2023-11-06 22:43:14,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:14,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 600 transitions. [2023-11-06 22:43:14,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:14,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:14,405 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:14,407 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 110 flow. Second operand 3 states and 600 transitions. [2023-11-06 22:43:14,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 53 transitions, 222 flow [2023-11-06 22:43:14,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:43:14,420 INFO L231 Difference]: Finished difference. Result has 48 places, 51 transitions, 150 flow [2023-11-06 22:43:14,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=48, PETRI_TRANSITIONS=51} [2023-11-06 22:43:14,426 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -3 predicate places. [2023-11-06 22:43:14,426 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 51 transitions, 150 flow [2023-11-06 22:43:14,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.66666666666666) internal successors, (542), 3 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:14,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:14,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-06 22:43:14,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:14,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:14,639 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:43:14,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:14,640 INFO L85 PathProgramCache]: Analyzing trace with hash 28632, now seen corresponding path program 1 times [2023-11-06 22:43:14,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:14,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334383570] [2023-11-06 22:43:14,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:14,641 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:14,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:14,643 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:43:14,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-06 22:43:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:14,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:43:14,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:14,770 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:43:14,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:14,778 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:43:14,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:14,789 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:14,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:14,804 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:43:14,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:14,812 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:43:14,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:14,820 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:14,824 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:14,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:14,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334383570] [2023-11-06 22:43:14,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334383570] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:14,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:14,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:43:14,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997108725] [2023-11-06 22:43:14,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:14,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:43:14,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:14,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:43:14,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:43:14,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 453 [2023-11-06 22:43:14,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 51 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:14,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:14,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 453 [2023-11-06 22:43:14,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:15,436 INFO L124 PetriNetUnfolderBase]: 706/1078 cut-off events. [2023-11-06 22:43:15,437 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:43:15,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2184 conditions, 1078 events. 706/1078 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 5217 event pairs, 463 based on Foata normal form. 4/380 useless extension candidates. Maximal degree in co-relation 2151. Up to 1062 conditions per place. [2023-11-06 22:43:15,445 INFO L140 encePairwiseOnDemand]: 445/453 looper letters, 40 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2023-11-06 22:43:15,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 228 flow [2023-11-06 22:43:15,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:43:15,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:43:15,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2023-11-06 22:43:15,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434878587196468 [2023-11-06 22:43:15,449 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2023-11-06 22:43:15,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2023-11-06 22:43:15,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:15,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2023-11-06 22:43:15,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:15,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:15,458 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:15,458 INFO L175 Difference]: Start difference. First operand has 48 places, 51 transitions, 150 flow. Second operand 3 states and 591 transitions. [2023-11-06 22:43:15,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 228 flow [2023-11-06 22:43:15,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 47 transitions, 218 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:43:15,461 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 138 flow [2023-11-06 22:43:15,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2023-11-06 22:43:15,462 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -6 predicate places. [2023-11-06 22:43:15,462 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 138 flow [2023-11-06 22:43:15,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:15,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:15,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:43:15,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:15,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:15,675 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:43:15,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:15,676 INFO L85 PathProgramCache]: Analyzing trace with hash 27613833, now seen corresponding path program 1 times [2023-11-06 22:43:15,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:15,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8883561] [2023-11-06 22:43:15,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:15,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:15,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:15,678 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:43:15,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-06 22:43:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:15,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:43:15,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:15,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:15,859 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-11-06 22:43:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:15,920 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:15,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8883561] [2023-11-06 22:43:15,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8883561] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:15,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:15,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2023-11-06 22:43:15,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616163969] [2023-11-06 22:43:15,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:15,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:43:15,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:15,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:43:15,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:43:16,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 453 [2023-11-06 22:43:16,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 177.16666666666666) internal successors, (1063), 6 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:16,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:16,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 453 [2023-11-06 22:43:16,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:17,613 INFO L124 PetriNetUnfolderBase]: 709/1085 cut-off events. [2023-11-06 22:43:17,613 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:43:17,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2208 conditions, 1085 events. 709/1085 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 5264 event pairs, 463 based on Foata normal form. 0/379 useless extension candidates. Maximal degree in co-relation 2133. Up to 1064 conditions per place. [2023-11-06 22:43:17,622 INFO L140 encePairwiseOnDemand]: 445/453 looper letters, 39 selfloop transitions, 14 changer transitions 0/54 dead transitions. [2023-11-06 22:43:17,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 54 transitions, 276 flow [2023-11-06 22:43:17,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:43:17,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:43:17,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 935 transitions. [2023-11-06 22:43:17,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41280353200883 [2023-11-06 22:43:17,627 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 935 transitions. [2023-11-06 22:43:17,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 935 transitions. [2023-11-06 22:43:17,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:17,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 935 transitions. [2023-11-06 22:43:17,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 187.0) internal successors, (935), 5 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:17,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 453.0) internal successors, (2718), 6 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:17,639 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 453.0) internal successors, (2718), 6 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:17,639 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 138 flow. Second operand 5 states and 935 transitions. [2023-11-06 22:43:17,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 54 transitions, 276 flow [2023-11-06 22:43:17,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 54 transitions, 260 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:43:17,643 INFO L231 Difference]: Finished difference. Result has 48 places, 52 transitions, 186 flow [2023-11-06 22:43:17,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=48, PETRI_TRANSITIONS=52} [2023-11-06 22:43:17,645 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -3 predicate places. [2023-11-06 22:43:17,645 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 52 transitions, 186 flow [2023-11-06 22:43:17,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 177.16666666666666) internal successors, (1063), 6 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:17,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:17,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:43:17,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:17,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:17,858 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:43:17,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:17,858 INFO L85 PathProgramCache]: Analyzing trace with hash 890779, now seen corresponding path program 1 times [2023-11-06 22:43:17,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:17,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1904620934] [2023-11-06 22:43:17,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:17,859 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:17,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:17,861 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:43:17,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-06 22:43:17,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:17,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:43:17,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:17,950 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 22:43:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:17,977 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:17,978 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:17,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1904620934] [2023-11-06 22:43:17,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1904620934] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:17,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:17,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:43:17,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113938647] [2023-11-06 22:43:17,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:17,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:43:17,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:17,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:43:17,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:43:18,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 453 [2023-11-06 22:43:18,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 52 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:18,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:18,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 453 [2023-11-06 22:43:18,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:18,711 INFO L124 PetriNetUnfolderBase]: 709/1084 cut-off events. [2023-11-06 22:43:18,711 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:43:18,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2219 conditions, 1084 events. 709/1084 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 5294 event pairs, 463 based on Foata normal form. 1/384 useless extension candidates. Maximal degree in co-relation 2133. Up to 1069 conditions per place. [2023-11-06 22:43:18,723 INFO L140 encePairwiseOnDemand]: 448/453 looper letters, 41 selfloop transitions, 9 changer transitions 0/51 dead transitions. [2023-11-06 22:43:18,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 51 transitions, 280 flow [2023-11-06 22:43:18,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:43:18,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:43:18,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 588 transitions. [2023-11-06 22:43:18,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326710816777042 [2023-11-06 22:43:18,727 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 588 transitions. [2023-11-06 22:43:18,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 588 transitions. [2023-11-06 22:43:18,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:18,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 588 transitions. [2023-11-06 22:43:18,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:18,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:18,735 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:18,735 INFO L175 Difference]: Start difference. First operand has 48 places, 52 transitions, 186 flow. Second operand 3 states and 588 transitions. [2023-11-06 22:43:18,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 51 transitions, 280 flow [2023-11-06 22:43:18,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:43:18,738 INFO L231 Difference]: Finished difference. Result has 47 places, 51 transitions, 186 flow [2023-11-06 22:43:18,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=47, PETRI_TRANSITIONS=51} [2023-11-06 22:43:18,739 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -4 predicate places. [2023-11-06 22:43:18,740 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 51 transitions, 186 flow [2023-11-06 22:43:18,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:18,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:18,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:43:18,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:18,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:18,952 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:43:18,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:18,953 INFO L85 PathProgramCache]: Analyzing trace with hash 889193, now seen corresponding path program 1 times [2023-11-06 22:43:18,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:18,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97927449] [2023-11-06 22:43:18,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:18,953 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:18,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:18,954 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:43:18,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-06 22:43:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:19,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:43:19,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:19,046 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 22:43:19,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:19,061 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:43:19,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:19,070 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:43:19,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:19,080 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:43:19,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:19,095 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:43:19,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:19,116 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:43:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:19,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:19,405 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:19,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97927449] [2023-11-06 22:43:19,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97927449] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:19,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:19,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-11-06 22:43:19,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268466696] [2023-11-06 22:43:19,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:19,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:43:19,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:19,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:43:19,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:43:20,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 453 [2023-11-06 22:43:20,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 51 transitions, 186 flow. Second operand has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:20,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:20,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 453 [2023-11-06 22:43:20,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:22,226 INFO L124 PetriNetUnfolderBase]: 717/1094 cut-off events. [2023-11-06 22:43:22,227 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-06 22:43:22,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2261 conditions, 1094 events. 717/1094 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 5301 event pairs, 463 based on Foata normal form. 6/397 useless extension candidates. Maximal degree in co-relation 2133. Up to 1075 conditions per place. [2023-11-06 22:43:22,235 INFO L140 encePairwiseOnDemand]: 444/453 looper letters, 40 selfloop transitions, 22 changer transitions 0/63 dead transitions. [2023-11-06 22:43:22,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 63 transitions, 390 flow [2023-11-06 22:43:22,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:43:22,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:43:22,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1088 transitions. [2023-11-06 22:43:22,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40029433406916853 [2023-11-06 22:43:22,241 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1088 transitions. [2023-11-06 22:43:22,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1088 transitions. [2023-11-06 22:43:22,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:22,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1088 transitions. [2023-11-06 22:43:22,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.33333333333334) internal successors, (1088), 6 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:22,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 453.0) internal successors, (3171), 7 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:22,255 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 453.0) internal successors, (3171), 7 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:22,255 INFO L175 Difference]: Start difference. First operand has 47 places, 51 transitions, 186 flow. Second operand 6 states and 1088 transitions. [2023-11-06 22:43:22,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 63 transitions, 390 flow [2023-11-06 22:43:22,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 63 transitions, 346 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-06 22:43:22,260 INFO L231 Difference]: Finished difference. Result has 53 places, 63 transitions, 312 flow [2023-11-06 22:43:22,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=53, PETRI_TRANSITIONS=63} [2023-11-06 22:43:22,264 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-11-06 22:43:22,264 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 63 transitions, 312 flow [2023-11-06 22:43:22,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:22,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:22,265 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2023-11-06 22:43:22,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:22,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:22,477 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:43:22,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:22,478 INFO L85 PathProgramCache]: Analyzing trace with hash 856028510, now seen corresponding path program 1 times [2023-11-06 22:43:22,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:22,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1991704971] [2023-11-06 22:43:22,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:22,481 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:22,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:22,482 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:43:22,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-06 22:43:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:22,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 22:43:22,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:22,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:22,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:22,708 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:43:22,720 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 22:43:22,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:22,756 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 22:43:22,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:22,771 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-06 22:43:22,894 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 22:43:22,895 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 22:43:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:23,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:23,941 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:23,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1991704971] [2023-11-06 22:43:23,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1991704971] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:23,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:23,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 22:43:23,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636457616] [2023-11-06 22:43:23,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:23,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:43:23,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:23,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:43:23,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:43:28,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 453 [2023-11-06 22:43:28,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 63 transitions, 312 flow. Second operand has 10 states, 10 states have (on average 164.0) internal successors, (1640), 10 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:28,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:28,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 453 [2023-11-06 22:43:28,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:30,311 INFO L124 PetriNetUnfolderBase]: 1058/1654 cut-off events. [2023-11-06 22:43:30,312 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-06 22:43:30,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3407 conditions, 1654 events. 1058/1654 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 8797 event pairs, 690 based on Foata normal form. 0/663 useless extension candidates. Maximal degree in co-relation 3326. Up to 816 conditions per place. [2023-11-06 22:43:30,325 INFO L140 encePairwiseOnDemand]: 445/453 looper letters, 72 selfloop transitions, 16 changer transitions 0/89 dead transitions. [2023-11-06 22:43:30,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 89 transitions, 522 flow [2023-11-06 22:43:30,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:43:30,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:43:30,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1718 transitions. [2023-11-06 22:43:30,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3792494481236203 [2023-11-06 22:43:30,336 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1718 transitions. [2023-11-06 22:43:30,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1718 transitions. [2023-11-06 22:43:30,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:30,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1718 transitions. [2023-11-06 22:43:30,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 171.8) internal successors, (1718), 10 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:30,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 453.0) internal successors, (4983), 11 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:30,353 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 453.0) internal successors, (4983), 11 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:30,354 INFO L175 Difference]: Start difference. First operand has 53 places, 63 transitions, 312 flow. Second operand 10 states and 1718 transitions. [2023-11-06 22:43:30,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 89 transitions, 522 flow [2023-11-06 22:43:30,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 89 transitions, 473 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-11-06 22:43:30,362 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 263 flow [2023-11-06 22:43:30,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=263, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2023-11-06 22:43:30,366 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2023-11-06 22:43:30,367 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 263 flow [2023-11-06 22:43:30,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 164.0) internal successors, (1640), 10 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:30,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:30,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-06 22:43:30,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:30,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:30,580 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:43:30,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:30,581 INFO L85 PathProgramCache]: Analyzing trace with hash 27613837, now seen corresponding path program 1 times [2023-11-06 22:43:30,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:30,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724221604] [2023-11-06 22:43:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:30,581 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:30,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:30,583 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:43:30,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-06 22:43:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:30,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:43:30,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:30,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:30,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:30,745 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-11-06 22:43:30,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:30,788 INFO L322 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-06 22:43:30,789 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-06 22:43:30,835 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:43:30,835 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 22:43:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:43:30,860 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:43:30,860 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:30,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724221604] [2023-11-06 22:43:30,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724221604] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:43:30,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:43:30,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:43:30,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797053054] [2023-11-06 22:43:30,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:43:30,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:43:30,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:30,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:43:30,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:43:31,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 453 [2023-11-06 22:43:31,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:31,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:31,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 453 [2023-11-06 22:43:31,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:31,491 INFO L124 PetriNetUnfolderBase]: 700/1150 cut-off events. [2023-11-06 22:43:31,491 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-06 22:43:31,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2379 conditions, 1150 events. 700/1150 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 6001 event pairs, 454 based on Foata normal form. 0/528 useless extension candidates. Maximal degree in co-relation 2316. Up to 1134 conditions per place. [2023-11-06 22:43:31,500 INFO L140 encePairwiseOnDemand]: 450/453 looper letters, 51 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-11-06 22:43:31,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 53 transitions, 337 flow [2023-11-06 22:43:31,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:43:31,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:43:31,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-11-06 22:43:31,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392935982339956 [2023-11-06 22:43:31,504 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-11-06 22:43:31,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-11-06 22:43:31,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:31,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-11-06 22:43:31,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:31,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:31,510 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:31,510 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 263 flow. Second operand 3 states and 597 transitions. [2023-11-06 22:43:31,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 53 transitions, 337 flow [2023-11-06 22:43:31,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 303 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-11-06 22:43:31,514 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 201 flow [2023-11-06 22:43:31,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2023-11-06 22:43:31,515 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-11-06 22:43:31,515 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 201 flow [2023-11-06 22:43:31,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:31,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:31,516 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-11-06 22:43:31,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:31,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:31,728 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:43:31,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:31,729 INFO L85 PathProgramCache]: Analyzing trace with hash 721703897, now seen corresponding path program 2 times [2023-11-06 22:43:31,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:31,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [672534293] [2023-11-06 22:43:31,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:43:31,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:31,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:31,731 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:43:31,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-06 22:43:31,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:43:31,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:43:31,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:43:31,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:31,855 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-06 22:43:31,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:31,874 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:43:31,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:31,883 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:43:31,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:31,895 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:43:31,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:31,910 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:43:31,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:31,917 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:43:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:32,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:32,794 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:32,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [672534293] [2023-11-06 22:43:32,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [672534293] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:32,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:32,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 22:43:32,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740627064] [2023-11-06 22:43:32,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:32,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:43:32,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:32,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:43:32,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:43:38,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 453 [2023-11-06 22:43:38,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 201 flow. Second operand has 12 states, 12 states have (on average 173.0) internal successors, (2076), 12 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:38,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:43:38,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 453 [2023-11-06 22:43:38,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:43:42,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:43:43,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:43:45,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:43:47,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:43:50,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:43:52,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:43:53,377 INFO L124 PetriNetUnfolderBase]: 712/1175 cut-off events. [2023-11-06 22:43:53,377 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-11-06 22:43:53,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2460 conditions, 1175 events. 712/1175 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 6150 event pairs, 454 based on Foata normal form. 11/564 useless extension candidates. Maximal degree in co-relation 2448. Up to 1129 conditions per place. [2023-11-06 22:43:53,386 INFO L140 encePairwiseOnDemand]: 446/453 looper letters, 37 selfloop transitions, 40 changer transitions 0/78 dead transitions. [2023-11-06 22:43:53,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 78 transitions, 521 flow [2023-11-06 22:43:53,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:43:53,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:43:53,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2668 transitions. [2023-11-06 22:43:53,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39264164827078735 [2023-11-06 22:43:53,398 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2668 transitions. [2023-11-06 22:43:53,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2668 transitions. [2023-11-06 22:43:53,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:43:53,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2668 transitions. [2023-11-06 22:43:53,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 177.86666666666667) internal successors, (2668), 15 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:53,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 453.0) internal successors, (7248), 16 states have internal predecessors, (7248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:53,423 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 453.0) internal successors, (7248), 16 states have internal predecessors, (7248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:53,424 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 201 flow. Second operand 15 states and 2668 transitions. [2023-11-06 22:43:53,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 78 transitions, 521 flow [2023-11-06 22:43:53,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 78 transitions, 520 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:43:53,428 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 497 flow [2023-11-06 22:43:53,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=497, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2023-11-06 22:43:53,429 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 23 predicate places. [2023-11-06 22:43:53,429 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 497 flow [2023-11-06 22:43:53,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 173.0) internal successors, (2076), 12 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:43:53,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:43:53,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:43:53,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:43:53,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:53,644 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:43:53,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:43:53,645 INFO L85 PathProgramCache]: Analyzing trace with hash 767112059, now seen corresponding path program 1 times [2023-11-06 22:43:53,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:43:53,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1634565553] [2023-11-06 22:43:53,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:43:53,646 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:43:53,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:43:53,647 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:43:53,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-06 22:43:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:43:53,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:43:53,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:43:53,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:53,845 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 22:43:53,857 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-06 22:43:53,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:53,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:53,878 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:53,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:53,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:43:53,892 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:43:53,931 INFO L322 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-06 22:43:53,932 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 22:43:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:54,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:43:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:43:54,590 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:43:54,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1634565553] [2023-11-06 22:43:54,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1634565553] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:43:54,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:43:54,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2023-11-06 22:43:54,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396229788] [2023-11-06 22:43:54,591 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:43:54,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:43:54,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:43:54,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:43:54,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:43:56,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 22:43:58,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-11-06 22:44:01,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 453 [2023-11-06 22:44:01,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 497 flow. Second operand has 9 states, 9 states have (on average 166.33333333333334) internal successors, (1497), 9 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:01,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:01,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 453 [2023-11-06 22:44:01,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:02,602 INFO L124 PetriNetUnfolderBase]: 668/1095 cut-off events. [2023-11-06 22:44:02,602 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2023-11-06 22:44:02,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2389 conditions, 1095 events. 668/1095 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 5715 event pairs, 422 based on Foata normal form. 0/545 useless extension candidates. Maximal degree in co-relation 2368. Up to 537 conditions per place. [2023-11-06 22:44:02,611 INFO L140 encePairwiseOnDemand]: 446/453 looper letters, 85 selfloop transitions, 17 changer transitions 0/103 dead transitions. [2023-11-06 22:44:02,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 103 transitions, 757 flow [2023-11-06 22:44:02,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:44:02,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:44:02,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1394 transitions. [2023-11-06 22:44:02,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38465783664459163 [2023-11-06 22:44:02,618 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1394 transitions. [2023-11-06 22:44:02,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1394 transitions. [2023-11-06 22:44:02,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:02,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1394 transitions. [2023-11-06 22:44:02,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 174.25) internal successors, (1394), 8 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:02,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 453.0) internal successors, (4077), 9 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:02,632 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 453.0) internal successors, (4077), 9 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:02,632 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 497 flow. Second operand 8 states and 1394 transitions. [2023-11-06 22:44:02,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 103 transitions, 757 flow [2023-11-06 22:44:02,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 103 transitions, 629 flow, removed 42 selfloop flow, removed 5 redundant places. [2023-11-06 22:44:02,640 INFO L231 Difference]: Finished difference. Result has 74 places, 75 transitions, 399 flow [2023-11-06 22:44:02,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=399, PETRI_PLACES=74, PETRI_TRANSITIONS=75} [2023-11-06 22:44:02,641 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 23 predicate places. [2023-11-06 22:44:02,641 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 75 transitions, 399 flow [2023-11-06 22:44:02,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 166.33333333333334) internal successors, (1497), 9 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:02,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:02,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:44:02,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:44:02,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:02,855 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:44:02,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:02,855 INFO L85 PathProgramCache]: Analyzing trace with hash 767112061, now seen corresponding path program 1 times [2023-11-06 22:44:02,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:44:02,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936370330] [2023-11-06 22:44:02,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:02,856 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 [2023-11-06 22:44:02,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:44:02,857 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:44:02,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-06 22:44:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:03,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:44:03,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:03,040 INFO L322 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-06 22:44:03,041 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 15 [2023-11-06 22:44:03,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:44:03,056 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:44:03,057 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-06 22:44:03,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:44:03,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:44:03,089 INFO L322 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-06 22:44:03,090 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-06 22:44:03,109 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:44:03,109 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-06 22:44:03,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:44:03,138 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:44:03,139 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:44:03,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936370330] [2023-11-06 22:44:03,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936370330] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:44:03,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:44:03,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:44:03,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001840868] [2023-11-06 22:44:03,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:44:03,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:44:03,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:44:03,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:44:03,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:44:03,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 453 [2023-11-06 22:44:03,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 75 transitions, 399 flow. Second operand has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 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) [2023-11-06 22:44:03,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:03,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 453 [2023-11-06 22:44:03,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:03,613 INFO L124 PetriNetUnfolderBase]: 624/1015 cut-off events. [2023-11-06 22:44:03,613 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2023-11-06 22:44:03,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2182 conditions, 1015 events. 624/1015 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 5155 event pairs, 390 based on Foata normal form. 0/521 useless extension candidates. Maximal degree in co-relation 2161. Up to 999 conditions per place. [2023-11-06 22:44:03,619 INFO L140 encePairwiseOnDemand]: 450/453 looper letters, 71 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2023-11-06 22:44:03,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 73 transitions, 539 flow [2023-11-06 22:44:03,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:44:03,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:44:03,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 587 transitions. [2023-11-06 22:44:03,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43193524650478293 [2023-11-06 22:44:03,623 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 587 transitions. [2023-11-06 22:44:03,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 587 transitions. [2023-11-06 22:44:03,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:03,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 587 transitions. [2023-11-06 22:44:03,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.66666666666666) internal successors, (587), 3 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:03,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:03,630 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:03,630 INFO L175 Difference]: Start difference. First operand has 74 places, 75 transitions, 399 flow. Second operand 3 states and 587 transitions. [2023-11-06 22:44:03,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 73 transitions, 539 flow [2023-11-06 22:44:03,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 73 transitions, 506 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-06 22:44:03,636 INFO L231 Difference]: Finished difference. Result has 68 places, 73 transitions, 364 flow [2023-11-06 22:44:03,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=364, PETRI_PLACES=68, PETRI_TRANSITIONS=73} [2023-11-06 22:44:03,637 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2023-11-06 22:44:03,638 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 73 transitions, 364 flow [2023-11-06 22:44:03,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 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) [2023-11-06 22:44:03,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:03,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:44:03,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-11-06 22:44:03,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:03,851 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:44:03,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:03,851 INFO L85 PathProgramCache]: Analyzing trace with hash 767112067, now seen corresponding path program 1 times [2023-11-06 22:44:03,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:44:03,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880529628] [2023-11-06 22:44:03,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:03,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:03,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:44:03,853 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:44:03,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-06 22:44:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:04,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:44:04,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:44:04,067 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:44:04,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:44:04,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880529628] [2023-11-06 22:44:04,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880529628] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:44:04,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:44:04,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:44:04,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422099990] [2023-11-06 22:44:04,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:44:04,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:44:04,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:44:04,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:44:04,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:44:04,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 453 [2023-11-06 22:44:04,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 364 flow. Second operand has 4 states, 4 states have (on average 181.5) internal successors, (726), 4 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:04,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:04,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 453 [2023-11-06 22:44:04,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:04,882 INFO L124 PetriNetUnfolderBase]: 710/1212 cut-off events. [2023-11-06 22:44:04,883 INFO L125 PetriNetUnfolderBase]: For 221/221 co-relation queries the response was YES. [2023-11-06 22:44:04,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2623 conditions, 1212 events. 710/1212 cut-off events. For 221/221 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 6632 event pairs, 456 based on Foata normal form. 12/686 useless extension candidates. Maximal degree in co-relation 2602. Up to 998 conditions per place. [2023-11-06 22:44:04,894 INFO L140 encePairwiseOnDemand]: 442/453 looper letters, 105 selfloop transitions, 3 changer transitions 1/110 dead transitions. [2023-11-06 22:44:04,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 110 transitions, 757 flow [2023-11-06 22:44:04,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:44:04,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:44:04,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 781 transitions. [2023-11-06 22:44:04,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4310154525386313 [2023-11-06 22:44:04,899 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 781 transitions. [2023-11-06 22:44:04,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 781 transitions. [2023-11-06 22:44:04,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:04,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 781 transitions. [2023-11-06 22:44:04,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 195.25) internal successors, (781), 4 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:04,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 453.0) internal successors, (2265), 5 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:04,907 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 453.0) internal successors, (2265), 5 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:04,908 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 364 flow. Second operand 4 states and 781 transitions. [2023-11-06 22:44:04,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 110 transitions, 757 flow [2023-11-06 22:44:04,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 110 transitions, 756 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:44:04,917 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 386 flow [2023-11-06 22:44:04,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=386, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2023-11-06 22:44:04,918 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 20 predicate places. [2023-11-06 22:44:04,919 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 386 flow [2023-11-06 22:44:04,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.5) internal successors, (726), 4 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:04,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:04,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:44:04,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:44:05,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:05,133 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:44:05,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:05,134 INFO L85 PathProgramCache]: Analyzing trace with hash 767111961, now seen corresponding path program 1 times [2023-11-06 22:44:05,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:44:05,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094319221] [2023-11-06 22:44:05,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:05,134 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:05,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:44:05,135 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:44:05,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-06 22:44:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:05,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:44:05,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:44:05,300 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:44:05,300 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:44:05,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094319221] [2023-11-06 22:44:05,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094319221] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:44:05,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:44:05,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:44:05,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295498119] [2023-11-06 22:44:05,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:44:05,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:44:05,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:44:05,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:44:05,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:44:05,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 453 [2023-11-06 22:44:05,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 386 flow. Second operand has 5 states, 5 states have (on average 181.2) internal successors, (906), 5 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:05,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:05,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 453 [2023-11-06 22:44:05,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:06,487 INFO L124 PetriNetUnfolderBase]: 1370/2250 cut-off events. [2023-11-06 22:44:06,487 INFO L125 PetriNetUnfolderBase]: For 355/371 co-relation queries the response was YES. [2023-11-06 22:44:06,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5515 conditions, 2250 events. 1370/2250 cut-off events. For 355/371 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 13568 event pairs, 400 based on Foata normal form. 0/1438 useless extension candidates. Maximal degree in co-relation 5492. Up to 1279 conditions per place. [2023-11-06 22:44:06,509 INFO L140 encePairwiseOnDemand]: 447/453 looper letters, 82 selfloop transitions, 13 changer transitions 0/96 dead transitions. [2023-11-06 22:44:06,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 96 transitions, 639 flow [2023-11-06 22:44:06,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:44:06,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:44:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 778 transitions. [2023-11-06 22:44:06,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42935982339955847 [2023-11-06 22:44:06,513 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 778 transitions. [2023-11-06 22:44:06,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 778 transitions. [2023-11-06 22:44:06,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:06,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 778 transitions. [2023-11-06 22:44:06,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 194.5) internal successors, (778), 4 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:06,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 453.0) internal successors, (2265), 5 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:06,521 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 453.0) internal successors, (2265), 5 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:06,522 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 386 flow. Second operand 4 states and 778 transitions. [2023-11-06 22:44:06,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 96 transitions, 639 flow [2023-11-06 22:44:06,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 96 transitions, 634 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:44:06,528 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 431 flow [2023-11-06 22:44:06,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=431, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2023-11-06 22:44:06,529 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 22 predicate places. [2023-11-06 22:44:06,530 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 431 flow [2023-11-06 22:44:06,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 181.2) internal successors, (906), 5 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:06,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:06,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 22:44:06,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:44:06,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:06,743 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:44:06,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:06,744 INFO L85 PathProgramCache]: Analyzing trace with hash 767111960, now seen corresponding path program 1 times [2023-11-06 22:44:06,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:44:06,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581779490] [2023-11-06 22:44:06,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:06,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:06,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:44:06,746 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:44:06,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-06 22:44:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:06,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:44:06,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:06,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:44:06,861 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:44:06,861 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:44:06,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1581779490] [2023-11-06 22:44:06,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1581779490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:44:06,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:44:06,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:44:06,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894146350] [2023-11-06 22:44:06,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:44:06,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:44:06,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:44:06,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:44:06,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:44:07,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 453 [2023-11-06 22:44:07,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 431 flow. Second operand has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 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) [2023-11-06 22:44:07,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:07,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 453 [2023-11-06 22:44:07,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:07,588 INFO L124 PetriNetUnfolderBase]: 1150/1892 cut-off events. [2023-11-06 22:44:07,588 INFO L125 PetriNetUnfolderBase]: For 569/575 co-relation queries the response was YES. [2023-11-06 22:44:07,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4935 conditions, 1892 events. 1150/1892 cut-off events. For 569/575 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 11019 event pairs, 742 based on Foata normal form. 0/1344 useless extension candidates. Maximal degree in co-relation 4911. Up to 1822 conditions per place. [2023-11-06 22:44:07,612 INFO L140 encePairwiseOnDemand]: 450/453 looper letters, 62 selfloop transitions, 10 changer transitions 0/73 dead transitions. [2023-11-06 22:44:07,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 73 transitions, 569 flow [2023-11-06 22:44:07,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:44:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:44:07,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 585 transitions. [2023-11-06 22:44:07,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4304635761589404 [2023-11-06 22:44:07,616 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 585 transitions. [2023-11-06 22:44:07,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 585 transitions. [2023-11-06 22:44:07,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:07,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 585 transitions. [2023-11-06 22:44:07,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:07,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:07,624 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 453.0) internal successors, (1812), 4 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:07,625 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 431 flow. Second operand 3 states and 585 transitions. [2023-11-06 22:44:07,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 73 transitions, 569 flow [2023-11-06 22:44:07,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 73 transitions, 555 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:44:07,632 INFO L231 Difference]: Finished difference. Result has 71 places, 73 transitions, 431 flow [2023-11-06 22:44:07,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=431, PETRI_PLACES=71, PETRI_TRANSITIONS=73} [2023-11-06 22:44:07,634 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 20 predicate places. [2023-11-06 22:44:07,634 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 73 transitions, 431 flow [2023-11-06 22:44:07,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 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) [2023-11-06 22:44:07,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:07,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:07,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:44:07,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:07,851 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:44:07,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:07,851 INFO L85 PathProgramCache]: Analyzing trace with hash 943394067, now seen corresponding path program 1 times [2023-11-06 22:44:07,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:44:07,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231863978] [2023-11-06 22:44:07,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:07,852 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:07,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:44:07,854 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:44:07,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-06 22:44:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:08,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:44:08,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:08,040 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:44:08,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:44:08,049 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:44:08,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:44:08,056 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:44:08,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:44:08,060 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-06 22:44:08,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:44:08,077 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-06 22:44:08,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:44:08,085 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 22:44:08,114 INFO L322 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-06 22:44:08,115 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-11-06 22:44:08,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:44:08,136 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:44:08,137 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:44:08,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231863978] [2023-11-06 22:44:08,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231863978] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:44:08,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:44:08,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:44:08,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131298058] [2023-11-06 22:44:08,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:44:08,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:44:08,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:44:08,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:44:08,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:44:08,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 453 [2023-11-06 22:44:08,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 73 transitions, 431 flow. Second operand has 4 states, 4 states have (on average 181.75) internal successors, (727), 4 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:08,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:08,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 453 [2023-11-06 22:44:08,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:08,897 INFO L124 PetriNetUnfolderBase]: 882/1496 cut-off events. [2023-11-06 22:44:08,898 INFO L125 PetriNetUnfolderBase]: For 539/545 co-relation queries the response was YES. [2023-11-06 22:44:08,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3820 conditions, 1496 events. 882/1496 cut-off events. For 539/545 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 8521 event pairs, 574 based on Foata normal form. 0/1184 useless extension candidates. Maximal degree in co-relation 3797. Up to 1428 conditions per place. [2023-11-06 22:44:08,908 INFO L140 encePairwiseOnDemand]: 448/453 looper letters, 48 selfloop transitions, 22 changer transitions 0/71 dead transitions. [2023-11-06 22:44:08,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 563 flow [2023-11-06 22:44:08,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:44:08,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 22:44:08,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 931 transitions. [2023-11-06 22:44:08,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.411037527593819 [2023-11-06 22:44:08,912 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 931 transitions. [2023-11-06 22:44:08,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 931 transitions. [2023-11-06 22:44:08,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:08,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 931 transitions. [2023-11-06 22:44:08,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 186.2) internal successors, (931), 5 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:08,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 453.0) internal successors, (2718), 6 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:08,920 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 453.0) internal successors, (2718), 6 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:08,920 INFO L175 Difference]: Start difference. First operand has 71 places, 73 transitions, 431 flow. Second operand 5 states and 931 transitions. [2023-11-06 22:44:08,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 563 flow [2023-11-06 22:44:08,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 71 transitions, 553 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:44:08,926 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 457 flow [2023-11-06 22:44:08,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=457, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2023-11-06 22:44:08,927 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 21 predicate places. [2023-11-06 22:44:08,927 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 457 flow [2023-11-06 22:44:08,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 181.75) internal successors, (727), 4 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:08,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:08,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:08,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:44:09,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:09,140 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:44:09,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:09,141 INFO L85 PathProgramCache]: Analyzing trace with hash 943394068, now seen corresponding path program 1 times [2023-11-06 22:44:09,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:44:09,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231539285] [2023-11-06 22:44:09,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:09,142 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:09,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:44:09,143 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:44:09,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-06 22:44:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:09,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:44:09,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:09,372 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 22:44:09,382 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 22:44:09,404 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:44:09,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:44:09,419 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:44:09,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:44:09,439 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:44:09,450 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:44:09,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:44:09,464 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:44:09,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:44:09,496 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:44:09,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:44:09,510 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:44:09,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:44:09,681 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:44:09,695 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 22:44:09,696 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-06 22:44:09,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:44:09,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:44:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:44:10,828 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:44:10,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231539285] [2023-11-06 22:44:10,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231539285] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:44:10,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:44:10,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-11-06 22:44:10,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995667687] [2023-11-06 22:44:10,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:44:10,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:44:10,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:44:10,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:44:10,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:44:24,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 453 [2023-11-06 22:44:24,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 457 flow. Second operand has 8 states, 8 states have (on average 163.75) internal successors, (1310), 8 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:24,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:24,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 453 [2023-11-06 22:44:24,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:33,814 INFO L124 PetriNetUnfolderBase]: 1906/3190 cut-off events. [2023-11-06 22:44:33,814 INFO L125 PetriNetUnfolderBase]: For 1175/1175 co-relation queries the response was YES. [2023-11-06 22:44:33,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8056 conditions, 3190 events. 1906/3190 cut-off events. For 1175/1175 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 19746 event pairs, 1222 based on Foata normal form. 76/2810 useless extension candidates. Maximal degree in co-relation 8032. Up to 1195 conditions per place. [2023-11-06 22:44:33,833 INFO L140 encePairwiseOnDemand]: 444/453 looper letters, 142 selfloop transitions, 19 changer transitions 0/162 dead transitions. [2023-11-06 22:44:33,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 162 transitions, 1314 flow [2023-11-06 22:44:33,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:44:33,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 22:44:33,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2037 transitions. [2023-11-06 22:44:33,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37472406181015455 [2023-11-06 22:44:33,843 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2037 transitions. [2023-11-06 22:44:33,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2037 transitions. [2023-11-06 22:44:33,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:33,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2037 transitions. [2023-11-06 22:44:33,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 169.75) internal successors, (2037), 12 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:33,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 453.0) internal successors, (5889), 13 states have internal predecessors, (5889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:33,863 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 453.0) internal successors, (5889), 13 states have internal predecessors, (5889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:33,864 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 457 flow. Second operand 12 states and 2037 transitions. [2023-11-06 22:44:33,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 162 transitions, 1314 flow [2023-11-06 22:44:33,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 162 transitions, 1259 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-06 22:44:33,877 INFO L231 Difference]: Finished difference. Result has 86 places, 79 transitions, 581 flow [2023-11-06 22:44:33,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=581, PETRI_PLACES=86, PETRI_TRANSITIONS=79} [2023-11-06 22:44:33,878 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 35 predicate places. [2023-11-06 22:44:33,878 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 79 transitions, 581 flow [2023-11-06 22:44:33,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 163.75) internal successors, (1310), 8 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:33,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:33,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:33,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-11-06 22:44:34,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:34,097 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:44:34,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:34,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1539712907, now seen corresponding path program 1 times [2023-11-06 22:44:34,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:44:34,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780993634] [2023-11-06 22:44:34,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:34,098 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:34,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:44:34,099 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:44:34,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-06 22:44:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:34,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 22:44:34,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:34,260 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 22:44:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:44:34,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:44:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:44:35,241 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:44:35,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780993634] [2023-11-06 22:44:35,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780993634] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:44:35,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:44:35,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-06 22:44:35,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360549684] [2023-11-06 22:44:35,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:44:35,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:44:35,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:44:35,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:44:35,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:44:37,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 453 [2023-11-06 22:44:37,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 79 transitions, 581 flow. Second operand has 10 states, 10 states have (on average 173.6) internal successors, (1736), 10 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:37,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:37,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 453 [2023-11-06 22:44:37,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:41,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:44:42,789 INFO L124 PetriNetUnfolderBase]: 3972/6370 cut-off events. [2023-11-06 22:44:42,789 INFO L125 PetriNetUnfolderBase]: For 3083/3083 co-relation queries the response was YES. [2023-11-06 22:44:42,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16616 conditions, 6370 events. 3972/6370 cut-off events. For 3083/3083 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 41201 event pairs, 376 based on Foata normal form. 228/5872 useless extension candidates. Maximal degree in co-relation 16586. Up to 1816 conditions per place. [2023-11-06 22:44:42,844 INFO L140 encePairwiseOnDemand]: 442/453 looper letters, 110 selfloop transitions, 38 changer transitions 0/149 dead transitions. [2023-11-06 22:44:42,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 149 transitions, 1112 flow [2023-11-06 22:44:42,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:44:42,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:44:42,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1653 transitions. [2023-11-06 22:44:42,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40544518027961735 [2023-11-06 22:44:42,854 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1653 transitions. [2023-11-06 22:44:42,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1653 transitions. [2023-11-06 22:44:42,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:42,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1653 transitions. [2023-11-06 22:44:42,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 183.66666666666666) internal successors, (1653), 9 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:42,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 453.0) internal successors, (4530), 10 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:42,870 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 453.0) internal successors, (4530), 10 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:42,870 INFO L175 Difference]: Start difference. First operand has 86 places, 79 transitions, 581 flow. Second operand 9 states and 1653 transitions. [2023-11-06 22:44:42,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 149 transitions, 1112 flow [2023-11-06 22:44:42,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 149 transitions, 1101 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-06 22:44:42,886 INFO L231 Difference]: Finished difference. Result has 96 places, 89 transitions, 743 flow [2023-11-06 22:44:42,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=743, PETRI_PLACES=96, PETRI_TRANSITIONS=89} [2023-11-06 22:44:42,887 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 45 predicate places. [2023-11-06 22:44:42,888 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 89 transitions, 743 flow [2023-11-06 22:44:42,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 173.6) internal successors, (1736), 10 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:42,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:42,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:42,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:44:43,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:43,104 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:44:43,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:43,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1614398729, now seen corresponding path program 1 times [2023-11-06 22:44:43,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:44:43,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793111810] [2023-11-06 22:44:43,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:43,106 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:43,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:44:43,107 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:44:43,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-06 22:44:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:43,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:44:43,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:44:43,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:44:43,509 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2023-11-06 22:44:43,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:44:43,779 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:44:43,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793111810] [2023-11-06 22:44:43,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793111810] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:44:43,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:44:43,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-11-06 22:44:43,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080044] [2023-11-06 22:44:43,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:44:43,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:44:43,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:44:43,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:44:43,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:44:46,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 453 [2023-11-06 22:44:46,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 89 transitions, 743 flow. Second operand has 12 states, 12 states have (on average 176.66666666666666) internal successors, (2120), 12 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:46,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:46,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 453 [2023-11-06 22:44:46,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:49,462 INFO L124 PetriNetUnfolderBase]: 3768/6126 cut-off events. [2023-11-06 22:44:49,462 INFO L125 PetriNetUnfolderBase]: For 6209/6209 co-relation queries the response was YES. [2023-11-06 22:44:49,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18877 conditions, 6126 events. 3768/6126 cut-off events. For 6209/6209 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 40014 event pairs, 356 based on Foata normal form. 192/5820 useless extension candidates. Maximal degree in co-relation 18841. Up to 1369 conditions per place. [2023-11-06 22:44:49,511 INFO L140 encePairwiseOnDemand]: 445/453 looper letters, 130 selfloop transitions, 33 changer transitions 0/164 dead transitions. [2023-11-06 22:44:49,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 164 transitions, 1323 flow [2023-11-06 22:44:49,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:44:49,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 22:44:49,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1869 transitions. [2023-11-06 22:44:49,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41258278145695365 [2023-11-06 22:44:49,519 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1869 transitions. [2023-11-06 22:44:49,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1869 transitions. [2023-11-06 22:44:49,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:49,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1869 transitions. [2023-11-06 22:44:49,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 186.9) internal successors, (1869), 10 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:49,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 453.0) internal successors, (4983), 11 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:49,535 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 453.0) internal successors, (4983), 11 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:49,536 INFO L175 Difference]: Start difference. First operand has 96 places, 89 transitions, 743 flow. Second operand 10 states and 1869 transitions. [2023-11-06 22:44:49,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 164 transitions, 1323 flow [2023-11-06 22:44:49,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 164 transitions, 1262 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-06 22:44:49,567 INFO L231 Difference]: Finished difference. Result has 101 places, 96 transitions, 791 flow [2023-11-06 22:44:49,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=791, PETRI_PLACES=101, PETRI_TRANSITIONS=96} [2023-11-06 22:44:49,568 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 50 predicate places. [2023-11-06 22:44:49,568 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 96 transitions, 791 flow [2023-11-06 22:44:49,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 176.66666666666666) internal successors, (2120), 12 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:49,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:49,569 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-06 22:44:49,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:44:49,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:49,789 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:44:49,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:49,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1406462076, now seen corresponding path program 2 times [2023-11-06 22:44:49,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:44:49,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338423961] [2023-11-06 22:44:49,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:44:49,791 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:49,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:44:49,793 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:44:49,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-06 22:44:49,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 22:44:49,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:44:49,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:44:49,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:50,005 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:44:50,014 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 22:44:50,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:44:50,037 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:44:50,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:44:50,073 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:44:50,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:44:50,088 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:44:50,098 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 22:44:50,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:44:50,110 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:44:50,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:44:50,126 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:44:50,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:44:50,255 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:44:50,272 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 22:44:50,272 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-06 22:44:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 22:44:50,349 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:44:50,349 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:44:50,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1338423961] [2023-11-06 22:44:50,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1338423961] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:44:50,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:44:50,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:44:50,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200567847] [2023-11-06 22:44:50,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:44:50,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:44:50,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:44:50,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:44:50,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:44:51,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 453 [2023-11-06 22:44:51,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 96 transitions, 791 flow. Second operand has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:51,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:44:51,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 453 [2023-11-06 22:44:51,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:44:52,328 INFO L124 PetriNetUnfolderBase]: 3242/5386 cut-off events. [2023-11-06 22:44:52,328 INFO L125 PetriNetUnfolderBase]: For 5920/5944 co-relation queries the response was YES. [2023-11-06 22:44:52,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16621 conditions, 5386 events. 3242/5386 cut-off events. For 5920/5944 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 35039 event pairs, 2118 based on Foata normal form. 312/5240 useless extension candidates. Maximal degree in co-relation 16584. Up to 5341 conditions per place. [2023-11-06 22:44:52,369 INFO L140 encePairwiseOnDemand]: 449/453 looper letters, 77 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2023-11-06 22:44:52,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 90 transitions, 899 flow [2023-11-06 22:44:52,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:44:52,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 22:44:52,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 732 transitions. [2023-11-06 22:44:52,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40397350993377484 [2023-11-06 22:44:52,372 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 732 transitions. [2023-11-06 22:44:52,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 732 transitions. [2023-11-06 22:44:52,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:44:52,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 732 transitions. [2023-11-06 22:44:52,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 183.0) internal successors, (732), 4 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:52,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 453.0) internal successors, (2265), 5 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:52,379 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 453.0) internal successors, (2265), 5 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:52,379 INFO L175 Difference]: Start difference. First operand has 101 places, 96 transitions, 791 flow. Second operand 4 states and 732 transitions. [2023-11-06 22:44:52,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 90 transitions, 899 flow [2023-11-06 22:44:52,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 90 transitions, 840 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-11-06 22:44:52,407 INFO L231 Difference]: Finished difference. Result has 95 places, 90 transitions, 686 flow [2023-11-06 22:44:52,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=686, PETRI_PLACES=95, PETRI_TRANSITIONS=90} [2023-11-06 22:44:52,408 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 44 predicate places. [2023-11-06 22:44:52,409 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 90 transitions, 686 flow [2023-11-06 22:44:52,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.75) internal successors, (711), 4 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:44:52,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:44:52,409 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 1, 1, 1] [2023-11-06 22:44:52,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:44:52,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:52,623 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:44:52,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:44:52,623 INFO L85 PathProgramCache]: Analyzing trace with hash 312241703, now seen corresponding path program 1 times [2023-11-06 22:44:52,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:44:52,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013962784] [2023-11-06 22:44:52,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:44:52,624 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:44:52,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:44:52,628 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:44:52,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-06 22:44:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:44:52,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:44:52,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:44:52,843 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-06 22:44:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:44:53,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:44:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:44:55,788 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:44:55,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013962784] [2023-11-06 22:44:55,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013962784] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:44:55,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:44:55,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-11-06 22:44:55,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959646863] [2023-11-06 22:44:55,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:44:55,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:44:55,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:44:55,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:44:55,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:45:16,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 453 [2023-11-06 22:45:16,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 90 transitions, 686 flow. Second operand has 20 states, 20 states have (on average 173.05) internal successors, (3461), 20 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:45:16,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:45:16,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 453 [2023-11-06 22:45:16,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:45:23,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:45:25,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:45:27,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:45:29,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:45:31,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:45:33,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:45:35,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:45:37,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-06 22:45:45,551 INFO L124 PetriNetUnfolderBase]: 3275/5448 cut-off events. [2023-11-06 22:45:45,552 INFO L125 PetriNetUnfolderBase]: For 4366/4384 co-relation queries the response was YES. [2023-11-06 22:45:45,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16021 conditions, 5448 events. 3275/5448 cut-off events. For 4366/4384 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 35415 event pairs, 2118 based on Foata normal form. 37/4955 useless extension candidates. Maximal degree in co-relation 15986. Up to 5326 conditions per place. [2023-11-06 22:45:45,586 INFO L140 encePairwiseOnDemand]: 446/453 looper letters, 43 selfloop transitions, 64 changer transitions 0/108 dead transitions. [2023-11-06 22:45:45,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 108 transitions, 1059 flow [2023-11-06 22:45:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 22:45:45,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-06 22:45:45,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3533 transitions. [2023-11-06 22:45:45,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38995584988962473 [2023-11-06 22:45:45,593 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3533 transitions. [2023-11-06 22:45:45,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3533 transitions. [2023-11-06 22:45:45,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:45:45,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3533 transitions. [2023-11-06 22:45:45,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 176.65) internal successors, (3533), 20 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:45:45,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 453.0) internal successors, (9513), 21 states have internal predecessors, (9513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:45:45,619 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 453.0) internal successors, (9513), 21 states have internal predecessors, (9513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:45:45,619 INFO L175 Difference]: Start difference. First operand has 95 places, 90 transitions, 686 flow. Second operand 20 states and 3533 transitions. [2023-11-06 22:45:45,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 108 transitions, 1059 flow [2023-11-06 22:45:45,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 108 transitions, 1039 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-06 22:45:45,651 INFO L231 Difference]: Finished difference. Result has 121 places, 108 transitions, 1048 flow [2023-11-06 22:45:45,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=453, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1048, PETRI_PLACES=121, PETRI_TRANSITIONS=108} [2023-11-06 22:45:45,652 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 70 predicate places. [2023-11-06 22:45:45,652 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 108 transitions, 1048 flow [2023-11-06 22:45:45,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 173.05) internal successors, (3461), 20 states have internal predecessors, (3461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:45:45,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:45:45,653 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 1, 1] [2023-11-06 22:45:45,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:45:45,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:45:45,866 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-06 22:45:45,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:45:45,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1950668649, now seen corresponding path program 3 times [2023-11-06 22:45:45,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:45:45,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647612986] [2023-11-06 22:45:45,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:45:45,867 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:45:45,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:45:45,868 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:45:45,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e427be5c-79d1-4c6d-8bd2-87436c49ae6f/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-06 22:45:46,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-06 22:45:46,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:45:46,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:45:46,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:45:46,166 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 22:45:46,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:45:46,179 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:45:46,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:45:46,203 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-06 22:45:46,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:45:46,215 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:45:46,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:45:46,228 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-06 22:45:46,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:45:46,237 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 22:45:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:46,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:45:51,181 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:45:51,181 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:45:51,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647612986] [2023-11-06 22:45:51,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647612986] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:45:51,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:45:51,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2023-11-06 22:45:51,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137523034] [2023-11-06 22:45:51,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:45:51,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:45:51,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:45:51,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:45:51,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2023-11-06 22:46:28,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 453 [2023-11-06 22:46:28,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 108 transitions, 1048 flow. Second operand has 26 states, 26 states have (on average 173.0) internal successors, (4498), 26 states have internal predecessors, (4498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:46:28,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:46:28,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 453 [2023-11-06 22:46:28,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand