./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 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_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS --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 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 02:46:32,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 02:46:32,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 02:46:32,772 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 02:46:32,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 02:46:32,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 02:46:32,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 02:46:32,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 02:46:32,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 02:46:32,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 02:46:32,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 02:46:32,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 02:46:32,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 02:46:32,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 02:46:32,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 02:46:32,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 02:46:32,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 02:46:32,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 02:46:32,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 02:46:32,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 02:46:32,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 02:46:32,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 02:46:32,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 02:46:32,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 02:46:32,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 02:46:32,841 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 02:46:32,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 02:46:32,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 02:46:32,843 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 02:46:32,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 02:46:32,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 02:46:32,845 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 02:46:32,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 02:46:32,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 02:46:32,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 02:46:32,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 02:46:32,852 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 02:46:32,852 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 02:46:32,853 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 02:46:32,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 02:46:32,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 02:46:32,855 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-23 02:46:32,898 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 02:46:32,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 02:46:32,899 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 02:46:32,899 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 02:46:32,900 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 02:46:32,900 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 02:46:32,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 02:46:32,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 02:46:32,901 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 02:46:32,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 02:46:32,903 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 02:46:32,903 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 02:46:32,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 02:46:32,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 02:46:32,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 02:46:32,904 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 02:46:32,904 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 02:46:32,905 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 02:46:32,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 02:46:32,905 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 02:46:32,905 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 02:46:32,906 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 02:46:32,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 02:46:32,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 02:46:32,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 02:46:32,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:46:32,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 02:46:32,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 02:46:32,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 02:46:32,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 02:46:32,908 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 02:46:32,909 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 02:46:32,909 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 02:46:32,909 INFO L138 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_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 [2022-11-23 02:46:33,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 02:46:33,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 02:46:33,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 02:46:33,198 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 02:46:33,199 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 02:46:33,200 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-11-23 02:46:36,280 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 02:46:36,479 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 02:46:36,479 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-11-23 02:46:36,486 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/data/ad8bf0ddc/bbee6827e3f24744846e6e5331f51d3c/FLAGcfed63bc4 [2022-11-23 02:46:36,501 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/data/ad8bf0ddc/bbee6827e3f24744846e6e5331f51d3c [2022-11-23 02:46:36,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 02:46:36,506 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 02:46:36,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 02:46:36,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 02:46:36,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 02:46:36,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:46:36" (1/1) ... [2022-11-23 02:46:36,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50b4629f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:36, skipping insertion in model container [2022-11-23 02:46:36,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:46:36" (1/1) ... [2022-11-23 02:46:36,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 02:46:36,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:46:36,748 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-11-23 02:46:36,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:46:36,791 ERROR L326 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) [2022-11-23 02:46:36,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6fcf5478 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:36, skipping insertion in model container [2022-11-23 02:46:36,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 02:46:36,795 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-23 02:46:36,798 INFO L158 Benchmark]: Toolchain (without parser) took 290.49ms. Allocated memory is still 184.5MB. Free memory was 139.1MB in the beginning and 129.4MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 02:46:36,799 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 127.9MB. Free memory was 73.0MB in the beginning and 72.8MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 02:46:36,800 INFO L158 Benchmark]: CACSL2BoogieTranslator took 287.71ms. Allocated memory is still 184.5MB. Free memory was 139.0MB in the beginning and 129.4MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 02:46:36,802 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 127.9MB. Free memory was 73.0MB in the beginning and 72.8MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 287.71ms. Allocated memory is still 184.5MB. Free memory was 139.0MB in the beginning and 129.4MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 94]: 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_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS --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 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 02:46:39,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 02:46:39,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 02:46:39,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 02:46:39,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 02:46:39,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 02:46:39,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 02:46:39,195 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 02:46:39,197 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 02:46:39,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 02:46:39,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 02:46:39,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 02:46:39,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 02:46:39,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 02:46:39,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 02:46:39,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 02:46:39,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 02:46:39,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 02:46:39,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 02:46:39,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 02:46:39,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 02:46:39,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 02:46:39,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 02:46:39,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 02:46:39,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 02:46:39,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 02:46:39,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 02:46:39,220 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 02:46:39,220 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 02:46:39,221 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 02:46:39,222 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 02:46:39,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 02:46:39,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 02:46:39,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 02:46:39,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 02:46:39,240 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 02:46:39,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 02:46:39,242 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 02:46:39,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 02:46:39,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 02:46:39,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 02:46:39,246 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-23 02:46:39,289 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 02:46:39,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 02:46:39,296 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 02:46:39,296 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 02:46:39,297 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 02:46:39,297 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 02:46:39,298 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 02:46:39,298 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 02:46:39,298 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 02:46:39,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 02:46:39,300 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 02:46:39,300 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 02:46:39,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 02:46:39,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 02:46:39,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 02:46:39,301 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 02:46:39,301 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 02:46:39,302 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 02:46:39,302 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 02:46:39,302 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 02:46:39,302 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 02:46:39,302 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 02:46:39,303 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 02:46:39,303 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 02:46:39,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 02:46:39,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 02:46:39,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 02:46:39,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:46:39,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 02:46:39,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 02:46:39,305 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-23 02:46:39,305 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 02:46:39,305 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 02:46:39,306 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 02:46:39,306 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 02:46:39,306 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-23 02:46:39,307 INFO L138 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_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 [2022-11-23 02:46:39,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 02:46:39,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 02:46:39,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 02:46:39,686 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 02:46:39,686 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 02:46:39,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-11-23 02:46:42,709 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 02:46:42,911 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 02:46:42,912 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-11-23 02:46:42,919 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/data/4124874aa/99ce842997484153a6ae0e32de612f96/FLAGffabab9b8 [2022-11-23 02:46:42,939 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/data/4124874aa/99ce842997484153a6ae0e32de612f96 [2022-11-23 02:46:42,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 02:46:42,944 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 02:46:42,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 02:46:42,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 02:46:42,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 02:46:42,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:46:42" (1/1) ... [2022-11-23 02:46:42,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a1b8050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:42, skipping insertion in model container [2022-11-23 02:46:42,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:46:42" (1/1) ... [2022-11-23 02:46:42,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 02:46:42,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:46:43,176 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-11-23 02:46:43,196 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:46:43,210 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-23 02:46:43,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:46:43,224 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-11-23 02:46:43,228 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:46:43,234 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 02:46:43,255 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-11-23 02:46:43,259 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:46:43,276 INFO L208 MainTranslator]: Completed translation [2022-11-23 02:46:43,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:43 WrapperNode [2022-11-23 02:46:43,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 02:46:43,278 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 02:46:43,278 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 02:46:43,278 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 02:46:43,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:43" (1/1) ... [2022-11-23 02:46:43,297 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:43" (1/1) ... [2022-11-23 02:46:43,324 INFO L138 Inliner]: procedures = 25, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 108 [2022-11-23 02:46:43,324 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 02:46:43,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 02:46:43,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 02:46:43,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 02:46:43,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:43" (1/1) ... [2022-11-23 02:46:43,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:43" (1/1) ... [2022-11-23 02:46:43,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:43" (1/1) ... [2022-11-23 02:46:43,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:43" (1/1) ... [2022-11-23 02:46:43,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:43" (1/1) ... [2022-11-23 02:46:43,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:43" (1/1) ... [2022-11-23 02:46:43,361 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:43" (1/1) ... [2022-11-23 02:46:43,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:43" (1/1) ... [2022-11-23 02:46:43,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 02:46:43,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 02:46:43,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 02:46:43,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 02:46:43,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:43" (1/1) ... [2022-11-23 02:46:43,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:46:43,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:46:43,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 02:46:43,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 02:46:43,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 02:46:43,437 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 02:46:43,437 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 02:46:43,438 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 02:46:43,438 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 02:46:43,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 02:46:43,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 02:46:43,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 02:46:43,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-23 02:46:43,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 02:46:43,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 02:46:43,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 02:46:43,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-23 02:46:43,441 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 02:46:43,547 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 02:46:43,549 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 02:46:44,177 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 02:46:44,186 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 02:46:44,186 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 02:46:44,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:46:44 BoogieIcfgContainer [2022-11-23 02:46:44,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 02:46:44,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 02:46:44,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 02:46:44,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 02:46:44,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:46:42" (1/3) ... [2022-11-23 02:46:44,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c455d0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:46:44, skipping insertion in model container [2022-11-23 02:46:44,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:46:43" (2/3) ... [2022-11-23 02:46:44,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c455d0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:46:44, skipping insertion in model container [2022-11-23 02:46:44,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:46:44" (3/3) ... [2022-11-23 02:46:44,202 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2022-11-23 02:46:44,221 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 02:46:44,221 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-11-23 02:46:44,222 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 02:46:44,398 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 02:46:44,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 194 transitions, 404 flow [2022-11-23 02:46:44,573 INFO L130 PetriNetUnfolder]: 15/192 cut-off events. [2022-11-23 02:46:44,575 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 02:46:44,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 192 events. 15/192 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 224 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 140. Up to 3 conditions per place. [2022-11-23 02:46:44,581 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 194 transitions, 404 flow [2022-11-23 02:46:44,593 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 187 transitions, 386 flow [2022-11-23 02:46:44,597 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 02:46:44,612 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 187 transitions, 386 flow [2022-11-23 02:46:44,615 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 187 transitions, 386 flow [2022-11-23 02:46:44,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 187 transitions, 386 flow [2022-11-23 02:46:44,656 INFO L130 PetriNetUnfolder]: 15/187 cut-off events. [2022-11-23 02:46:44,656 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 02:46:44,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 187 events. 15/187 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 223 event pairs, 0 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 140. Up to 3 conditions per place. [2022-11-23 02:46:44,661 INFO L119 LiptonReduction]: Number of co-enabled transitions 1720 [2022-11-23 02:47:10,563 INFO L134 LiptonReduction]: Checked pairs total: 2498 [2022-11-23 02:47:10,564 INFO L136 LiptonReduction]: Total number of compositions: 202 [2022-11-23 02:47:10,582 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:47:10,628 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;@73f6092c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:47:10,628 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2022-11-23 02:47:10,650 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-23 02:47:10,651 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 02:47:10,651 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:47:10,652 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 02:47:10,653 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:47:10,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:10,658 INFO L85 PathProgramCache]: Analyzing trace with hash 23120, now seen corresponding path program 1 times [2022-11-23 02:47:10,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:47:10,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54027913] [2022-11-23 02:47:10,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:10,708 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 [2022-11-23 02:47:10,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:47:10,751 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:47:10,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:47:10,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 02:47:10,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:10,999 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 02:47:11,000 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 02:47:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:47:11,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:47:11,024 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:47:11,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54027913] [2022-11-23 02:47:11,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54027913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:47:11,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:47:11,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 02:47:11,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67790962] [2022-11-23 02:47:11,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:47:11,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:47:11,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:47:11,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:47:11,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:47:11,265 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 396 [2022-11-23 02:47:11,268 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:11,268 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:47:11,268 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 396 [2022-11-23 02:47:11,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:47:11,663 INFO L130 PetriNetUnfolder]: 377/606 cut-off events. [2022-11-23 02:47:11,664 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-23 02:47:11,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1239 conditions, 606 events. 377/606 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 2502 event pairs, 287 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 1106. Up to 606 conditions per place. [2022-11-23 02:47:11,674 INFO L137 encePairwiseOnDemand]: 392/396 looper letters, 36 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2022-11-23 02:47:11,674 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 37 transitions, 160 flow [2022-11-23 02:47:11,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:47:11,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:47:11,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 550 transitions. [2022-11-23 02:47:11,700 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2022-11-23 02:47:11,701 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 550 transitions. [2022-11-23 02:47:11,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 550 transitions. [2022-11-23 02:47:11,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:47:11,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 550 transitions. [2022-11-23 02:47:11,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:11,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:11,724 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:11,726 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 92 flow. Second operand 3 states and 550 transitions. [2022-11-23 02:47:11,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 37 transitions, 160 flow [2022-11-23 02:47:11,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 37 transitions, 152 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-23 02:47:11,738 INFO L231 Difference]: Finished difference. Result has 37 places, 37 transitions, 80 flow [2022-11-23 02:47:11,741 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=37, PETRI_TRANSITIONS=37} [2022-11-23 02:47:11,747 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2022-11-23 02:47:11,748 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 80 flow [2022-11-23 02:47:11,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:11,749 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:47:11,750 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 02:47:11,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-23 02:47:11,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:47:11,962 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:47:11,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:11,963 INFO L85 PathProgramCache]: Analyzing trace with hash 23121, now seen corresponding path program 1 times [2022-11-23 02:47:11,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:47:11,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591397732] [2022-11-23 02:47:11,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:11,964 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 [2022-11-23 02:47:11,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:47:11,969 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:47:11,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:47:12,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 02:47:12,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:12,159 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 02:47:12,160 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 02:47:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:47:12,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:47:12,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:47:12,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591397732] [2022-11-23 02:47:12,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591397732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:47:12,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:47:12,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 02:47:12,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730855351] [2022-11-23 02:47:12,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:47:12,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:47:12,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:47:12,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:47:12,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:47:12,467 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 396 [2022-11-23 02:47:12,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:12,468 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:47:12,468 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 396 [2022-11-23 02:47:12,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:47:13,096 INFO L130 PetriNetUnfolder]: 753/1209 cut-off events. [2022-11-23 02:47:13,096 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 02:47:13,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2438 conditions, 1209 events. 753/1209 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 5833 event pairs, 574 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 2432. Up to 607 conditions per place. [2022-11-23 02:47:13,105 INFO L137 encePairwiseOnDemand]: 390/396 looper letters, 67 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2022-11-23 02:47:13,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 71 transitions, 294 flow [2022-11-23 02:47:13,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:47:13,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:47:13,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 583 transitions. [2022-11-23 02:47:13,108 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2022-11-23 02:47:13,108 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 583 transitions. [2022-11-23 02:47:13,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 583 transitions. [2022-11-23 02:47:13,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:47:13,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 583 transitions. [2022-11-23 02:47:13,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:13,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:13,114 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:13,115 INFO L175 Difference]: Start difference. First operand has 37 places, 37 transitions, 80 flow. Second operand 3 states and 583 transitions. [2022-11-23 02:47:13,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 71 transitions, 294 flow [2022-11-23 02:47:13,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 71 transitions, 293 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:47:13,117 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 111 flow [2022-11-23 02:47:13,117 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2022-11-23 02:47:13,118 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -2 predicate places. [2022-11-23 02:47:13,118 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 111 flow [2022-11-23 02:47:13,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:13,119 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:47:13,119 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 02:47:13,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:13,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:47:13,331 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:47:13,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:13,332 INFO L85 PathProgramCache]: Analyzing trace with hash 721858, now seen corresponding path program 1 times [2022-11-23 02:47:13,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:47:13,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821186383] [2022-11-23 02:47:13,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:13,333 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 [2022-11-23 02:47:13,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:47:13,334 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:47:13,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:47:13,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 02:47:13,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:13,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:47:13,554 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 02:47:13,554 INFO L350 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 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-23 02:47:13,681 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 02:47:13,682 INFO L350 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 [2022-11-23 02:47:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:47:13,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:47:13,731 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:47:13,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821186383] [2022-11-23 02:47:13,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821186383] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:47:13,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:47:13,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 02:47:13,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680815813] [2022-11-23 02:47:13,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:47:13,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:47:13,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:47:13,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:47:13,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:47:14,008 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 396 [2022-11-23 02:47:14,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:14,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:47:14,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 396 [2022-11-23 02:47:14,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:47:14,432 INFO L130 PetriNetUnfolder]: 573/943 cut-off events. [2022-11-23 02:47:14,432 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 02:47:14,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1920 conditions, 943 events. 573/943 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 4384 event pairs, 432 based on Foata normal form. 0/289 useless extension candidates. Maximal degree in co-relation 1911. Up to 943 conditions per place. [2022-11-23 02:47:14,438 INFO L137 encePairwiseOnDemand]: 393/396 looper letters, 37 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2022-11-23 02:47:14,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 38 transitions, 183 flow [2022-11-23 02:47:14,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:47:14,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:47:14,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 556 transitions. [2022-11-23 02:47:14,441 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.468013468013468 [2022-11-23 02:47:14,441 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 556 transitions. [2022-11-23 02:47:14,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 556 transitions. [2022-11-23 02:47:14,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:47:14,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 556 transitions. [2022-11-23 02:47:14,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:14,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:14,447 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:14,447 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 111 flow. Second operand 3 states and 556 transitions. [2022-11-23 02:47:14,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 38 transitions, 183 flow [2022-11-23 02:47:14,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 175 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 02:47:14,449 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 101 flow [2022-11-23 02:47:14,449 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2022-11-23 02:47:14,451 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2022-11-23 02:47:14,451 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 101 flow [2022-11-23 02:47:14,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:14,454 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:47:14,454 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 02:47:14,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:14,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:47:14,666 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:47:14,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:14,666 INFO L85 PathProgramCache]: Analyzing trace with hash 720032, now seen corresponding path program 1 times [2022-11-23 02:47:14,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:47:14,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454895169] [2022-11-23 02:47:14,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:14,667 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 [2022-11-23 02:47:14,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:47:14,673 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:47:14,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:47:14,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 02:47:14,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:14,858 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 02:47:14,858 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 02:47:14,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:47:14,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:47:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:47:15,215 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:47:15,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454895169] [2022-11-23 02:47:15,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454895169] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:47:15,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:47:15,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-23 02:47:15,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620127598] [2022-11-23 02:47:15,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:47:15,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 02:47:15,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:47:15,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 02:47:15,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-23 02:47:16,557 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 396 [2022-11-23 02:47:16,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 101 flow. Second operand has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:16,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:47:16,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 396 [2022-11-23 02:47:16,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:47:18,507 INFO L130 PetriNetUnfolder]: 865/1423 cut-off events. [2022-11-23 02:47:18,507 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 02:47:18,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2894 conditions, 1423 events. 865/1423 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 6895 event pairs, 648 based on Foata normal form. 0/436 useless extension candidates. Maximal degree in co-relation 2885. Up to 473 conditions per place. [2022-11-23 02:47:18,515 INFO L137 encePairwiseOnDemand]: 388/396 looper letters, 92 selfloop transitions, 17 changer transitions 0/109 dead transitions. [2022-11-23 02:47:18,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 109 transitions, 487 flow [2022-11-23 02:47:18,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 02:47:18,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 02:47:18,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1075 transitions. [2022-11-23 02:47:18,519 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4524410774410774 [2022-11-23 02:47:18,519 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1075 transitions. [2022-11-23 02:47:18,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1075 transitions. [2022-11-23 02:47:18,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:47:18,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1075 transitions. [2022-11-23 02:47:18,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 179.16666666666666) internal successors, (1075), 6 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:18,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 396.0) internal successors, (2772), 7 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:18,529 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 396.0) internal successors, (2772), 7 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:18,529 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 101 flow. Second operand 6 states and 1075 transitions. [2022-11-23 02:47:18,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 109 transitions, 487 flow [2022-11-23 02:47:18,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 109 transitions, 486 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:47:18,532 INFO L231 Difference]: Finished difference. Result has 46 places, 51 transitions, 229 flow [2022-11-23 02:47:18,532 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=229, PETRI_PLACES=46, PETRI_TRANSITIONS=51} [2022-11-23 02:47:18,533 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2022-11-23 02:47:18,533 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 51 transitions, 229 flow [2022-11-23 02:47:18,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 161.0) internal successors, (966), 6 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:18,534 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:47:18,534 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 02:47:18,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:18,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:47:18,750 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:47:18,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:18,751 INFO L85 PathProgramCache]: Analyzing trace with hash 721857, now seen corresponding path program 1 times [2022-11-23 02:47:18,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:47:18,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572434258] [2022-11-23 02:47:18,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:18,752 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 [2022-11-23 02:47:18,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:47:18,753 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:47:18,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:47:18,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 02:47:18,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:18,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:47:18,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:47:18,902 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 02:47:18,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-23 02:47:18,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 02:47:18,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:47:18,973 INFO L350 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 12 treesize of output 14 [2022-11-23 02:47:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:47:19,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:47:19,006 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:47:19,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572434258] [2022-11-23 02:47:19,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572434258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:47:19,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:47:19,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:47:19,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410389726] [2022-11-23 02:47:19,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:47:19,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:47:19,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:47:19,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:47:19,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:47:19,354 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 396 [2022-11-23 02:47:19,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 51 transitions, 229 flow. Second operand has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:19,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:47:19,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 396 [2022-11-23 02:47:19,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:47:19,769 INFO L130 PetriNetUnfolder]: 593/1022 cut-off events. [2022-11-23 02:47:19,769 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-23 02:47:19,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2137 conditions, 1022 events. 593/1022 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 5012 event pairs, 435 based on Foata normal form. 0/385 useless extension candidates. Maximal degree in co-relation 2123. Up to 1022 conditions per place. [2022-11-23 02:47:19,776 INFO L137 encePairwiseOnDemand]: 393/396 looper letters, 46 selfloop transitions, 1 changer transitions 0/47 dead transitions. [2022-11-23 02:47:19,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 47 transitions, 303 flow [2022-11-23 02:47:19,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:47:19,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:47:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2022-11-23 02:47:19,779 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4663299663299663 [2022-11-23 02:47:19,779 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2022-11-23 02:47:19,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2022-11-23 02:47:19,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:47:19,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2022-11-23 02:47:19,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:19,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:19,785 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:19,785 INFO L175 Difference]: Start difference. First operand has 46 places, 51 transitions, 229 flow. Second operand 3 states and 554 transitions. [2022-11-23 02:47:19,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 47 transitions, 303 flow [2022-11-23 02:47:19,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 47 transitions, 284 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-23 02:47:19,792 INFO L231 Difference]: Finished difference. Result has 45 places, 47 transitions, 192 flow [2022-11-23 02:47:19,792 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=45, PETRI_TRANSITIONS=47} [2022-11-23 02:47:19,795 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2022-11-23 02:47:19,795 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 47 transitions, 192 flow [2022-11-23 02:47:19,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:19,796 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:47:19,796 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 02:47:19,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:20,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:47:20,008 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:47:20,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:20,008 INFO L85 PathProgramCache]: Analyzing trace with hash 693722343, now seen corresponding path program 1 times [2022-11-23 02:47:20,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:47:20,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752250627] [2022-11-23 02:47:20,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:20,009 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 [2022-11-23 02:47:20,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:47:20,010 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:47:20,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:47:20,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 02:47:20,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:20,127 INFO L350 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 [2022-11-23 02:47:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:47:20,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:47:20,214 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:47:20,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752250627] [2022-11-23 02:47:20,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752250627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:47:20,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:47:20,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:47:20,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985705566] [2022-11-23 02:47:20,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:47:20,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 02:47:20,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:47:20,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 02:47:20,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:47:20,608 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 396 [2022-11-23 02:47:20,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 47 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:20,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:47:20,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 396 [2022-11-23 02:47:20,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:47:21,390 INFO L130 PetriNetUnfolder]: 1109/1904 cut-off events. [2022-11-23 02:47:21,391 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-11-23 02:47:21,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3910 conditions, 1904 events. 1109/1904 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11045 event pairs, 375 based on Foata normal form. 0/715 useless extension candidates. Maximal degree in co-relation 3895. Up to 1045 conditions per place. [2022-11-23 02:47:21,401 INFO L137 encePairwiseOnDemand]: 391/396 looper letters, 61 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2022-11-23 02:47:21,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 71 transitions, 385 flow [2022-11-23 02:47:21,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:47:21,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 02:47:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 888 transitions. [2022-11-23 02:47:21,404 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4484848484848485 [2022-11-23 02:47:21,405 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 888 transitions. [2022-11-23 02:47:21,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 888 transitions. [2022-11-23 02:47:21,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:47:21,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 888 transitions. [2022-11-23 02:47:21,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 177.6) internal successors, (888), 5 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:21,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:21,411 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:21,412 INFO L175 Difference]: Start difference. First operand has 45 places, 47 transitions, 192 flow. Second operand 5 states and 888 transitions. [2022-11-23 02:47:21,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 71 transitions, 385 flow [2022-11-23 02:47:21,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 71 transitions, 384 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:47:21,416 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 221 flow [2022-11-23 02:47:21,416 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2022-11-23 02:47:21,419 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2022-11-23 02:47:21,419 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 221 flow [2022-11-23 02:47:21,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.0) internal successors, (835), 5 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:21,422 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:47:21,422 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 02:47:21,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:21,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:47:21,634 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:47:21,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:21,634 INFO L85 PathProgramCache]: Analyzing trace with hash 693722342, now seen corresponding path program 1 times [2022-11-23 02:47:21,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:47:21,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1095905763] [2022-11-23 02:47:21,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:21,635 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 [2022-11-23 02:47:21,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:47:21,636 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:47:21,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:47:21,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 02:47:21,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:21,725 INFO L350 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 [2022-11-23 02:47:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:47:21,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:47:21,740 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:47:21,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1095905763] [2022-11-23 02:47:21,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1095905763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:47:21,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:47:21,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:47:21,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917488036] [2022-11-23 02:47:21,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:47:21,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:47:21,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:47:21,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:47:21,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:47:21,913 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 396 [2022-11-23 02:47:21,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 221 flow. Second operand has 4 states, 4 states have (on average 165.25) internal successors, (661), 4 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:21,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:47:21,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 396 [2022-11-23 02:47:21,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:47:22,368 INFO L130 PetriNetUnfolder]: 842/1451 cut-off events. [2022-11-23 02:47:22,368 INFO L131 PetriNetUnfolder]: For 127/127 co-relation queries the response was YES. [2022-11-23 02:47:22,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3178 conditions, 1451 events. 842/1451 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 7657 event pairs, 618 based on Foata normal form. 0/713 useless extension candidates. Maximal degree in co-relation 3161. Up to 1433 conditions per place. [2022-11-23 02:47:22,376 INFO L137 encePairwiseOnDemand]: 392/396 looper letters, 42 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2022-11-23 02:47:22,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 309 flow [2022-11-23 02:47:22,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:47:22,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 02:47:22,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 689 transitions. [2022-11-23 02:47:22,379 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43497474747474746 [2022-11-23 02:47:22,379 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 689 transitions. [2022-11-23 02:47:22,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 689 transitions. [2022-11-23 02:47:22,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:47:22,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 689 transitions. [2022-11-23 02:47:22,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:22,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:22,385 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:22,385 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 221 flow. Second operand 4 states and 689 transitions. [2022-11-23 02:47:22,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 309 flow [2022-11-23 02:47:22,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 293 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 02:47:22,388 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 209 flow [2022-11-23 02:47:22,388 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=209, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2022-11-23 02:47:22,389 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2022-11-23 02:47:22,389 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 209 flow [2022-11-23 02:47:22,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.25) internal successors, (661), 4 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:22,389 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:47:22,389 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 02:47:22,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:22,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:47:22,601 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:47:22,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:22,602 INFO L85 PathProgramCache]: Analyzing trace with hash 693722236, now seen corresponding path program 1 times [2022-11-23 02:47:22,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:47:22,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805684789] [2022-11-23 02:47:22,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:22,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:47:22,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:47:22,603 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:47:22,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:47:22,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 02:47:22,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:47:22,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:47:22,747 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:47:22,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [805684789] [2022-11-23 02:47:22,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [805684789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:47:22,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:47:22,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:47:22,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337023303] [2022-11-23 02:47:22,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:47:22,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:47:22,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:47:22,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:47:22,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:47:23,025 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 396 [2022-11-23 02:47:23,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 169.25) internal successors, (677), 4 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:23,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:47:23,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 396 [2022-11-23 02:47:23,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:47:23,665 INFO L130 PetriNetUnfolder]: 979/1747 cut-off events. [2022-11-23 02:47:23,666 INFO L131 PetriNetUnfolder]: For 152/152 co-relation queries the response was YES. [2022-11-23 02:47:23,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3771 conditions, 1747 events. 979/1747 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 9775 event pairs, 729 based on Foata normal form. 0/870 useless extension candidates. Maximal degree in co-relation 3754. Up to 1450 conditions per place. [2022-11-23 02:47:23,676 INFO L137 encePairwiseOnDemand]: 390/396 looper letters, 70 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2022-11-23 02:47:23,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 73 transitions, 465 flow [2022-11-23 02:47:23,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:47:23,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 02:47:23,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 729 transitions. [2022-11-23 02:47:23,679 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2022-11-23 02:47:23,680 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 729 transitions. [2022-11-23 02:47:23,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 729 transitions. [2022-11-23 02:47:23,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:47:23,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 729 transitions. [2022-11-23 02:47:23,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 182.25) internal successors, (729), 4 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:23,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:23,685 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:23,685 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 209 flow. Second operand 4 states and 729 transitions. [2022-11-23 02:47:23,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 73 transitions, 465 flow [2022-11-23 02:47:23,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 73 transitions, 457 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 02:47:23,708 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 217 flow [2022-11-23 02:47:23,709 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=217, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2022-11-23 02:47:23,711 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2022-11-23 02:47:23,711 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 217 flow [2022-11-23 02:47:23,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.25) internal successors, (677), 4 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:23,712 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:47:23,712 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 02:47:23,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:23,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:47:23,924 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:47:23,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:23,925 INFO L85 PathProgramCache]: Analyzing trace with hash 693722372, now seen corresponding path program 1 times [2022-11-23 02:47:23,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:47:23,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644708520] [2022-11-23 02:47:23,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:23,925 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 [2022-11-23 02:47:23,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:47:23,927 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:47:23,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:47:24,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 02:47:24,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:24,051 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-23 02:47:24,051 INFO L350 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-23 02:47:24,086 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 02:47:24,086 INFO L350 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 [2022-11-23 02:47:24,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:47:24,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:47:24,099 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:47:24,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644708520] [2022-11-23 02:47:24,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644708520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:47:24,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:47:24,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 02:47:24,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055512357] [2022-11-23 02:47:24,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:47:24,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:47:24,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:47:24,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:47:24,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:47:24,216 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 396 [2022-11-23 02:47:24,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:24,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:47:24,217 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 396 [2022-11-23 02:47:24,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:47:24,617 INFO L130 PetriNetUnfolder]: 892/1576 cut-off events. [2022-11-23 02:47:24,618 INFO L131 PetriNetUnfolder]: For 176/176 co-relation queries the response was YES. [2022-11-23 02:47:24,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3657 conditions, 1576 events. 892/1576 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8615 event pairs, 660 based on Foata normal form. 0/915 useless extension candidates. Maximal degree in co-relation 3639. Up to 1576 conditions per place. [2022-11-23 02:47:24,628 INFO L137 encePairwiseOnDemand]: 393/396 looper letters, 43 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2022-11-23 02:47:24,628 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 301 flow [2022-11-23 02:47:24,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:47:24,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:47:24,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 544 transitions. [2022-11-23 02:47:24,631 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45791245791245794 [2022-11-23 02:47:24,631 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 544 transitions. [2022-11-23 02:47:24,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 544 transitions. [2022-11-23 02:47:24,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:47:24,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 544 transitions. [2022-11-23 02:47:24,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:24,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:24,635 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:24,636 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 217 flow. Second operand 3 states and 544 transitions. [2022-11-23 02:47:24,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 301 flow [2022-11-23 02:47:24,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 44 transitions, 295 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-23 02:47:24,638 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 209 flow [2022-11-23 02:47:24,638 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2022-11-23 02:47:24,639 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2022-11-23 02:47:24,639 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 209 flow [2022-11-23 02:47:24,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:24,640 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:47:24,640 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 02:47:24,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:24,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:47:24,851 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:47:24,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:24,852 INFO L85 PathProgramCache]: Analyzing trace with hash 693722373, now seen corresponding path program 1 times [2022-11-23 02:47:24,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:47:24,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381030470] [2022-11-23 02:47:24,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:24,852 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 [2022-11-23 02:47:24,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:47:24,853 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:47:24,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:47:24,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 02:47:24,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:24,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:47:24,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:47:25,014 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 02:47:25,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-23 02:47:25,030 INFO L350 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 14 treesize of output 12 [2022-11-23 02:47:25,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:47:25,067 INFO L350 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 12 treesize of output 14 [2022-11-23 02:47:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:47:25,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:47:25,130 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:47:25,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381030470] [2022-11-23 02:47:25,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381030470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:47:25,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:47:25,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:47:25,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166100831] [2022-11-23 02:47:25,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:47:25,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:47:25,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:47:25,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:47:25,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:47:25,515 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 396 [2022-11-23 02:47:25,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:25,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:47:25,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 396 [2022-11-23 02:47:25,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:47:25,966 INFO L130 PetriNetUnfolder]: 805/1405 cut-off events. [2022-11-23 02:47:25,966 INFO L131 PetriNetUnfolder]: For 175/175 co-relation queries the response was YES. [2022-11-23 02:47:25,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3286 conditions, 1405 events. 805/1405 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 7429 event pairs, 591 based on Foata normal form. 0/876 useless extension candidates. Maximal degree in co-relation 3267. Up to 1405 conditions per place. [2022-11-23 02:47:25,986 INFO L137 encePairwiseOnDemand]: 393/396 looper letters, 41 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2022-11-23 02:47:25,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 289 flow [2022-11-23 02:47:25,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 02:47:25,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 02:47:25,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 542 transitions. [2022-11-23 02:47:25,990 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4562289562289562 [2022-11-23 02:47:25,990 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 542 transitions. [2022-11-23 02:47:25,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 542 transitions. [2022-11-23 02:47:25,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:47:25,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 542 transitions. [2022-11-23 02:47:25,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2022-11-23 02:47:25,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:25,995 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 396.0) internal successors, (1584), 4 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:25,995 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 209 flow. Second operand 3 states and 542 transitions. [2022-11-23 02:47:25,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 289 flow [2022-11-23 02:47:25,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:47:25,997 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 206 flow [2022-11-23 02:47:25,998 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2022-11-23 02:47:25,998 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2022-11-23 02:47:25,999 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 206 flow [2022-11-23 02:47:25,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:25,999 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:47:25,999 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-23 02:47:26,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-23 02:47:26,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:47:26,203 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:47:26,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:26,203 INFO L85 PathProgramCache]: Analyzing trace with hash -21105135, now seen corresponding path program 2 times [2022-11-23 02:47:26,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:47:26,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214799147] [2022-11-23 02:47:26,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:47:26,204 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:47:26,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:47:26,205 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:47:26,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:26,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:47:26,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:47:26,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 02:47:26,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:26,362 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 02:47:26,363 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 02:47:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:47:26,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:47:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:47:27,341 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:47:27,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214799147] [2022-11-23 02:47:27,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1214799147] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:47:27,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:47:27,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-23 02:47:27,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610599516] [2022-11-23 02:47:27,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:47:27,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 02:47:27,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:47:27,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 02:47:27,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-23 02:47:32,578 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 396 [2022-11-23 02:47:32,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 206 flow. Second operand has 12 states, 12 states have (on average 163.0) internal successors, (1956), 12 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:32,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:47:32,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 396 [2022-11-23 02:47:32,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:47:37,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:47:38,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:47:40,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:47:44,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:47:46,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:47:48,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:47:52,554 INFO L130 PetriNetUnfolder]: 2664/4640 cut-off events. [2022-11-23 02:47:52,554 INFO L131 PetriNetUnfolder]: For 577/577 co-relation queries the response was YES. [2022-11-23 02:47:52,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10714 conditions, 4640 events. 2664/4640 cut-off events. For 577/577 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 28898 event pairs, 1970 based on Foata normal form. 18/2891 useless extension candidates. Maximal degree in co-relation 10694. Up to 721 conditions per place. [2022-11-23 02:47:52,582 INFO L137 encePairwiseOnDemand]: 389/396 looper letters, 225 selfloop transitions, 32 changer transitions 0/257 dead transitions. [2022-11-23 02:47:52,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 257 transitions, 1422 flow [2022-11-23 02:47:52,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 02:47:52,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-23 02:47:52,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2203 transitions. [2022-11-23 02:47:52,589 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4635942760942761 [2022-11-23 02:47:52,590 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2203 transitions. [2022-11-23 02:47:52,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2203 transitions. [2022-11-23 02:47:52,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:47:52,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2203 transitions. [2022-11-23 02:47:52,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 183.58333333333334) internal successors, (2203), 12 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:52,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 396.0) internal successors, (5148), 13 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:52,606 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 396.0) internal successors, (5148), 13 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:52,606 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 206 flow. Second operand 12 states and 2203 transitions. [2022-11-23 02:47:52,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 257 transitions, 1422 flow [2022-11-23 02:47:52,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 257 transitions, 1421 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-23 02:47:52,612 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 452 flow [2022-11-23 02:47:52,613 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=452, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2022-11-23 02:47:52,613 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2022-11-23 02:47:52,613 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 452 flow [2022-11-23 02:47:52,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.0) internal successors, (1956), 12 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:52,614 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:47:52,615 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 02:47:52,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:52,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:47:52,826 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:47:52,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:52,826 INFO L85 PathProgramCache]: Analyzing trace with hash -19438643, now seen corresponding path program 1 times [2022-11-23 02:47:52,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:47:52,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723501799] [2022-11-23 02:47:52,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:52,827 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 [2022-11-23 02:47:52,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:47:52,828 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:47:52,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:52,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:47:52,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 02:47:52,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:52,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:47:52,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:47:52,986 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:47:52,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723501799] [2022-11-23 02:47:52,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723501799] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:47:52,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:47:52,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:47:52,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365130680] [2022-11-23 02:47:52,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:47:52,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 02:47:52,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:47:52,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 02:47:52,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:47:53,175 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 396 [2022-11-23 02:47:53,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 452 flow. Second operand has 5 states, 5 states have (on average 168.2) internal successors, (841), 5 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:53,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:47:53,176 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 396 [2022-11-23 02:47:53,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:47:54,219 INFO L130 PetriNetUnfolder]: 2465/4321 cut-off events. [2022-11-23 02:47:54,220 INFO L131 PetriNetUnfolder]: For 350/350 co-relation queries the response was YES. [2022-11-23 02:47:54,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10069 conditions, 4321 events. 2465/4321 cut-off events. For 350/350 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 26869 event pairs, 945 based on Foata normal form. 12/2700 useless extension candidates. Maximal degree in co-relation 10041. Up to 2190 conditions per place. [2022-11-23 02:47:54,245 INFO L137 encePairwiseOnDemand]: 388/396 looper letters, 78 selfloop transitions, 15 changer transitions 0/93 dead transitions. [2022-11-23 02:47:54,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 93 transitions, 722 flow [2022-11-23 02:47:54,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:47:54,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 02:47:54,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 899 transitions. [2022-11-23 02:47:54,249 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.454040404040404 [2022-11-23 02:47:54,249 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 899 transitions. [2022-11-23 02:47:54,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 899 transitions. [2022-11-23 02:47:54,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:47:54,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 899 transitions. [2022-11-23 02:47:54,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 179.8) internal successors, (899), 5 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:54,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:54,256 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:54,256 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 452 flow. Second operand 5 states and 899 transitions. [2022-11-23 02:47:54,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 93 transitions, 722 flow [2022-11-23 02:47:54,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 93 transitions, 663 flow, removed 14 selfloop flow, removed 4 redundant places. [2022-11-23 02:47:54,262 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 454 flow [2022-11-23 02:47:54,263 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=454, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2022-11-23 02:47:54,263 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2022-11-23 02:47:54,263 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 454 flow [2022-11-23 02:47:54,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 168.2) internal successors, (841), 5 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:54,264 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:47:54,264 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:47:54,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-23 02:47:54,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:47:54,476 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:47:54,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:54,477 INFO L85 PathProgramCache]: Analyzing trace with hash -602987398, now seen corresponding path program 1 times [2022-11-23 02:47:54,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:47:54,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1374314697] [2022-11-23 02:47:54,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:54,477 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 [2022-11-23 02:47:54,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:47:54,478 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:47:54,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:47:54,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 02:47:54,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:54,672 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 02:47:54,673 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 02:47:54,710 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 02:47:54,711 INFO L350 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 19 treesize of output 27 [2022-11-23 02:47:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:47:54,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:47:54,729 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:47:54,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1374314697] [2022-11-23 02:47:54,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1374314697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:47:54,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:47:54,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:47:54,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342027423] [2022-11-23 02:47:54,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:47:54,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:47:54,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:47:54,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:47:54,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:47:55,030 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 396 [2022-11-23 02:47:55,031 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 454 flow. Second operand has 4 states, 4 states have (on average 165.75) internal successors, (663), 4 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:55,031 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:47:55,031 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 396 [2022-11-23 02:47:55,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:47:55,858 INFO L130 PetriNetUnfolder]: 1778/3154 cut-off events. [2022-11-23 02:47:55,858 INFO L131 PetriNetUnfolder]: For 770/770 co-relation queries the response was YES. [2022-11-23 02:47:55,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7795 conditions, 3154 events. 1778/3154 cut-off events. For 770/770 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18814 event pairs, 1230 based on Foata normal form. 0/2182 useless extension candidates. Maximal degree in co-relation 7764. Up to 3141 conditions per place. [2022-11-23 02:47:55,874 INFO L137 encePairwiseOnDemand]: 392/396 looper letters, 48 selfloop transitions, 12 changer transitions 0/60 dead transitions. [2022-11-23 02:47:55,874 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 60 transitions, 566 flow [2022-11-23 02:47:55,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:47:55,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 02:47:55,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 683 transitions. [2022-11-23 02:47:55,890 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4311868686868687 [2022-11-23 02:47:55,890 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 683 transitions. [2022-11-23 02:47:55,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 683 transitions. [2022-11-23 02:47:55,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:47:55,891 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 683 transitions. [2022-11-23 02:47:55,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 170.75) internal successors, (683), 4 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:55,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:55,896 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:55,896 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 454 flow. Second operand 4 states and 683 transitions. [2022-11-23 02:47:55,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 60 transitions, 566 flow [2022-11-23 02:47:55,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 60 transitions, 545 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-23 02:47:55,904 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 449 flow [2022-11-23 02:47:55,904 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=449, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2022-11-23 02:47:55,904 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2022-11-23 02:47:55,905 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 449 flow [2022-11-23 02:47:55,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.75) internal successors, (663), 4 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:47:55,905 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:47:55,905 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:47:55,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:56,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:47:56,123 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:47:56,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:47:56,123 INFO L85 PathProgramCache]: Analyzing trace with hash -602987397, now seen corresponding path program 1 times [2022-11-23 02:47:56,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:47:56,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523491652] [2022-11-23 02:47:56,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:47:56,124 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 [2022-11-23 02:47:56,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:47:56,126 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:47:56,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:47:56,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:47:56,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 02:47:56,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:47:56,365 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 02:47:56,366 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 02:47:56,497 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-23 02:47:56,498 INFO L350 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 16 treesize of output 22 [2022-11-23 02:47:56,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:47:56,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:47:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:47:57,862 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:47:57,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523491652] [2022-11-23 02:47:57,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523491652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:47:57,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:47:57,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-23 02:47:57,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679783867] [2022-11-23 02:47:57,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:47:57,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 02:47:57,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:47:57,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 02:47:57,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-23 02:48:03,776 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 396 [2022-11-23 02:48:03,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 449 flow. Second operand has 12 states, 12 states have (on average 152.16666666666666) internal successors, (1826), 12 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:03,778 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:48:03,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 396 [2022-11-23 02:48:03,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:48:13,210 INFO L130 PetriNetUnfolder]: 2405/4412 cut-off events. [2022-11-23 02:48:13,210 INFO L131 PetriNetUnfolder]: For 1243/1243 co-relation queries the response was YES. [2022-11-23 02:48:13,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10593 conditions, 4412 events. 2405/4412 cut-off events. For 1243/1243 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 29422 event pairs, 879 based on Foata normal form. 0/3074 useless extension candidates. Maximal degree in co-relation 10562. Up to 1147 conditions per place. [2022-11-23 02:48:13,234 INFO L137 encePairwiseOnDemand]: 384/396 looper letters, 180 selfloop transitions, 44 changer transitions 0/224 dead transitions. [2022-11-23 02:48:13,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 224 transitions, 1487 flow [2022-11-23 02:48:13,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 02:48:13,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-23 02:48:13,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3365 transitions. [2022-11-23 02:48:13,244 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40464165464165464 [2022-11-23 02:48:13,244 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3365 transitions. [2022-11-23 02:48:13,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3365 transitions. [2022-11-23 02:48:13,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:48:13,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3365 transitions. [2022-11-23 02:48:13,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 160.23809523809524) internal successors, (3365), 21 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:13,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 396.0) internal successors, (8712), 22 states have internal predecessors, (8712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:13,268 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 396.0) internal successors, (8712), 22 states have internal predecessors, (8712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:13,268 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 449 flow. Second operand 21 states and 3365 transitions. [2022-11-23 02:48:13,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 224 transitions, 1487 flow [2022-11-23 02:48:13,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 224 transitions, 1474 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 02:48:13,278 INFO L231 Difference]: Finished difference. Result has 89 places, 88 transitions, 816 flow [2022-11-23 02:48:13,279 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=816, PETRI_PLACES=89, PETRI_TRANSITIONS=88} [2022-11-23 02:48:13,279 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2022-11-23 02:48:13,279 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 88 transitions, 816 flow [2022-11-23 02:48:13,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.16666666666666) internal successors, (1826), 12 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:13,280 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:48:13,280 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:48:13,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:48:13,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:48:13,493 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:48:13,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:48:13,493 INFO L85 PathProgramCache]: Analyzing trace with hash 947283537, now seen corresponding path program 1 times [2022-11-23 02:48:13,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:48:13,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387446834] [2022-11-23 02:48:13,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:48:13,495 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 [2022-11-23 02:48:13,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:48:13,496 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:48:13,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:48:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:48:13,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 02:48:13,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:48:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:48:13,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:48:13,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:48:13,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387446834] [2022-11-23 02:48:13,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387446834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:48:13,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:48:13,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:48:13,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903525242] [2022-11-23 02:48:13,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:48:13,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:48:13,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:48:13,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:48:13,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:48:13,940 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 396 [2022-11-23 02:48:13,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 88 transitions, 816 flow. Second operand has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:13,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:48:13,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 396 [2022-11-23 02:48:13,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:48:14,809 INFO L130 PetriNetUnfolder]: 2225/4112 cut-off events. [2022-11-23 02:48:14,809 INFO L131 PetriNetUnfolder]: For 5422/5422 co-relation queries the response was YES. [2022-11-23 02:48:14,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12024 conditions, 4112 events. 2225/4112 cut-off events. For 5422/5422 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 26598 event pairs, 1599 based on Foata normal form. 60/3520 useless extension candidates. Maximal degree in co-relation 11987. Up to 3818 conditions per place. [2022-11-23 02:48:14,837 INFO L137 encePairwiseOnDemand]: 390/396 looper letters, 105 selfloop transitions, 3 changer transitions 0/108 dead transitions. [2022-11-23 02:48:14,837 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 108 transitions, 1165 flow [2022-11-23 02:48:14,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:48:14,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 02:48:14,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 715 transitions. [2022-11-23 02:48:14,841 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4513888888888889 [2022-11-23 02:48:14,841 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 715 transitions. [2022-11-23 02:48:14,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 715 transitions. [2022-11-23 02:48:14,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:48:14,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 715 transitions. [2022-11-23 02:48:14,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 178.75) internal successors, (715), 4 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:14,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:14,847 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:14,847 INFO L175 Difference]: Start difference. First operand has 89 places, 88 transitions, 816 flow. Second operand 4 states and 715 transitions. [2022-11-23 02:48:14,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 108 transitions, 1165 flow [2022-11-23 02:48:14,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 108 transitions, 1084 flow, removed 20 selfloop flow, removed 2 redundant places. [2022-11-23 02:48:14,925 INFO L231 Difference]: Finished difference. Result has 91 places, 88 transitions, 750 flow [2022-11-23 02:48:14,925 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=750, PETRI_PLACES=91, PETRI_TRANSITIONS=88} [2022-11-23 02:48:14,926 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2022-11-23 02:48:14,926 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 88 transitions, 750 flow [2022-11-23 02:48:14,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:14,927 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:48:14,927 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:48:14,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-23 02:48:15,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:48:15,140 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:48:15,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:48:15,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1500521118, now seen corresponding path program 1 times [2022-11-23 02:48:15,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:48:15,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [388650795] [2022-11-23 02:48:15,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:48:15,141 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 [2022-11-23 02:48:15,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:48:15,143 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:48:15,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:48:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:48:15,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 02:48:15,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:48:15,320 INFO L350 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 [2022-11-23 02:48:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:48:15,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:48:15,477 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:48:15,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [388650795] [2022-11-23 02:48:15,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [388650795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:48:15,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:48:15,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:48:15,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689222707] [2022-11-23 02:48:15,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:48:15,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 02:48:15,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:48:15,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 02:48:15,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:48:15,915 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 396 [2022-11-23 02:48:15,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 88 transitions, 750 flow. Second operand has 5 states, 5 states have (on average 163.6) internal successors, (818), 5 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:15,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:48:15,919 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 396 [2022-11-23 02:48:15,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:48:17,405 INFO L130 PetriNetUnfolder]: 3949/7108 cut-off events. [2022-11-23 02:48:17,405 INFO L131 PetriNetUnfolder]: For 11546/11546 co-relation queries the response was YES. [2022-11-23 02:48:17,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21865 conditions, 7108 events. 3949/7108 cut-off events. For 11546/11546 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 50389 event pairs, 1563 based on Foata normal form. 12/6504 useless extension candidates. Maximal degree in co-relation 21827. Up to 3597 conditions per place. [2022-11-23 02:48:17,447 INFO L137 encePairwiseOnDemand]: 389/396 looper letters, 97 selfloop transitions, 21 changer transitions 0/118 dead transitions. [2022-11-23 02:48:17,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 118 transitions, 1113 flow [2022-11-23 02:48:17,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:48:17,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 02:48:17,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 867 transitions. [2022-11-23 02:48:17,450 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43787878787878787 [2022-11-23 02:48:17,451 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 867 transitions. [2022-11-23 02:48:17,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 867 transitions. [2022-11-23 02:48:17,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:48:17,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 867 transitions. [2022-11-23 02:48:17,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.4) internal successors, (867), 5 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:17,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:17,457 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:17,457 INFO L175 Difference]: Start difference. First operand has 91 places, 88 transitions, 750 flow. Second operand 5 states and 867 transitions. [2022-11-23 02:48:17,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 118 transitions, 1113 flow [2022-11-23 02:48:17,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 118 transitions, 1108 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-23 02:48:17,483 INFO L231 Difference]: Finished difference. Result has 94 places, 88 transitions, 814 flow [2022-11-23 02:48:17,483 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=814, PETRI_PLACES=94, PETRI_TRANSITIONS=88} [2022-11-23 02:48:17,483 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2022-11-23 02:48:17,484 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 88 transitions, 814 flow [2022-11-23 02:48:17,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 163.6) internal successors, (818), 5 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:17,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:48:17,484 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:48:17,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:48:17,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:48:17,696 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:48:17,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:48:17,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1500521154, now seen corresponding path program 1 times [2022-11-23 02:48:17,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:48:17,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065814362] [2022-11-23 02:48:17,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:48:17,697 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 [2022-11-23 02:48:17,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:48:17,698 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:48:17,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:48:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:48:17,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 02:48:17,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:48:17,833 INFO L350 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 [2022-11-23 02:48:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:48:17,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:48:17,940 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:48:17,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065814362] [2022-11-23 02:48:17,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065814362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:48:17,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:48:17,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 02:48:17,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7000667] [2022-11-23 02:48:17,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:48:17,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 02:48:17,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:48:17,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 02:48:17,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:48:18,373 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 396 [2022-11-23 02:48:18,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 88 transitions, 814 flow. Second operand has 5 states, 5 states have (on average 167.6) internal successors, (838), 5 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:18,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:48:18,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 396 [2022-11-23 02:48:18,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:48:19,654 INFO L130 PetriNetUnfolder]: 3494/6333 cut-off events. [2022-11-23 02:48:19,654 INFO L131 PetriNetUnfolder]: For 11798/11798 co-relation queries the response was YES. [2022-11-23 02:48:19,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21367 conditions, 6333 events. 3494/6333 cut-off events. For 11798/11798 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 43594 event pairs, 1166 based on Foata normal form. 320/6653 useless extension candidates. Maximal degree in co-relation 21327. Up to 3391 conditions per place. [2022-11-23 02:48:19,754 INFO L137 encePairwiseOnDemand]: 391/396 looper letters, 76 selfloop transitions, 30 changer transitions 0/106 dead transitions. [2022-11-23 02:48:19,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 106 transitions, 1122 flow [2022-11-23 02:48:19,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 02:48:19,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-23 02:48:19,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 870 transitions. [2022-11-23 02:48:19,757 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2022-11-23 02:48:19,758 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 870 transitions. [2022-11-23 02:48:19,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 870 transitions. [2022-11-23 02:48:19,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:48:19,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 870 transitions. [2022-11-23 02:48:19,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:19,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:19,764 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 396.0) internal successors, (2376), 6 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:19,764 INFO L175 Difference]: Start difference. First operand has 94 places, 88 transitions, 814 flow. Second operand 5 states and 870 transitions. [2022-11-23 02:48:19,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 106 transitions, 1122 flow [2022-11-23 02:48:19,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 106 transitions, 1098 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-23 02:48:19,811 INFO L231 Difference]: Finished difference. Result has 97 places, 88 transitions, 870 flow [2022-11-23 02:48:19,811 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=870, PETRI_PLACES=97, PETRI_TRANSITIONS=88} [2022-11-23 02:48:19,812 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2022-11-23 02:48:19,812 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 88 transitions, 870 flow [2022-11-23 02:48:19,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 167.6) internal successors, (838), 5 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:19,813 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:48:19,813 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2022-11-23 02:48:19,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:48:20,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:48:20,025 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:48:20,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:48:20,025 INFO L85 PathProgramCache]: Analyzing trace with hash -85662564, now seen corresponding path program 2 times [2022-11-23 02:48:20,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:48:20,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873731914] [2022-11-23 02:48:20,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:48:20,026 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 [2022-11-23 02:48:20,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:48:20,031 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:48:20,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:48:20,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 02:48:20,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:48:20,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 02:48:20,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:48:20,226 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 02:48:20,226 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 02:48:20,303 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 02:48:20,304 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 02:48:20,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:48:20,397 INFO L350 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 14 treesize of output 16 [2022-11-23 02:48:20,412 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:48:20,413 INFO L350 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 [2022-11-23 02:48:20,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 02:48:20,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:48:20,484 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:48:20,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873731914] [2022-11-23 02:48:20,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873731914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:48:20,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:48:20,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:48:20,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565760773] [2022-11-23 02:48:20,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:48:20,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:48:20,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:48:20,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:48:20,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:48:20,814 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 396 [2022-11-23 02:48:20,815 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 88 transitions, 870 flow. Second operand has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:20,815 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:48:20,815 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 396 [2022-11-23 02:48:20,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:48:22,194 INFO L130 PetriNetUnfolder]: 3287/5982 cut-off events. [2022-11-23 02:48:22,194 INFO L131 PetriNetUnfolder]: For 13258/13258 co-relation queries the response was YES. [2022-11-23 02:48:22,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20029 conditions, 5982 events. 3287/5982 cut-off events. For 13258/13258 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 41058 event pairs, 1167 based on Foata normal form. 144/6126 useless extension candidates. Maximal degree in co-relation 19988. Up to 3095 conditions per place. [2022-11-23 02:48:22,231 INFO L137 encePairwiseOnDemand]: 392/396 looper letters, 87 selfloop transitions, 15 changer transitions 0/102 dead transitions. [2022-11-23 02:48:22,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 102 transitions, 1128 flow [2022-11-23 02:48:22,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:48:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-23 02:48:22,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 693 transitions. [2022-11-23 02:48:22,234 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4375 [2022-11-23 02:48:22,235 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 693 transitions. [2022-11-23 02:48:22,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 693 transitions. [2022-11-23 02:48:22,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:48:22,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 693 transitions. [2022-11-23 02:48:22,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:22,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:22,241 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 396.0) internal successors, (1980), 5 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:22,241 INFO L175 Difference]: Start difference. First operand has 97 places, 88 transitions, 870 flow. Second operand 4 states and 693 transitions. [2022-11-23 02:48:22,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 102 transitions, 1128 flow [2022-11-23 02:48:22,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 102 transitions, 1085 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-23 02:48:22,285 INFO L231 Difference]: Finished difference. Result has 98 places, 88 transitions, 874 flow [2022-11-23 02:48:22,286 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=874, PETRI_PLACES=98, PETRI_TRANSITIONS=88} [2022-11-23 02:48:22,286 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2022-11-23 02:48:22,286 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 88 transitions, 874 flow [2022-11-23 02:48:22,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.75) internal successors, (659), 4 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:22,287 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:48:22,287 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:48:22,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:48:22,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:48:22,504 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:48:22,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:48:22,504 INFO L85 PathProgramCache]: Analyzing trace with hash 349842064, now seen corresponding path program 1 times [2022-11-23 02:48:22,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:48:22,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285013337] [2022-11-23 02:48:22,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:48:22,505 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 [2022-11-23 02:48:22,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:48:22,506 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:48:22,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:48:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:48:22,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 02:48:22,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:48:22,757 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 02:48:22,757 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 02:48:22,845 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 02:48:22,845 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 02:48:22,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:48:22,989 INFO L350 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 14 treesize of output 16 [2022-11-23 02:48:23,017 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:48:23,018 INFO L350 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 [2022-11-23 02:48:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:48:23,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:48:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:48:27,722 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:48:27,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285013337] [2022-11-23 02:48:27,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285013337] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:48:27,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:48:27,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-23 02:48:27,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333372678] [2022-11-23 02:48:27,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:48:27,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 02:48:27,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:48:27,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 02:48:27,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-23 02:48:32,528 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 396 [2022-11-23 02:48:32,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 88 transitions, 874 flow. Second operand has 8 states, 8 states have (on average 152.25) internal successors, (1218), 8 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:32,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:48:32,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 396 [2022-11-23 02:48:32,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:48:37,674 INFO L130 PetriNetUnfolder]: 4838/8912 cut-off events. [2022-11-23 02:48:37,674 INFO L131 PetriNetUnfolder]: For 18554/18554 co-relation queries the response was YES. [2022-11-23 02:48:37,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29810 conditions, 8912 events. 4838/8912 cut-off events. For 18554/18554 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 67219 event pairs, 2332 based on Foata normal form. 464/9376 useless extension candidates. Maximal degree in co-relation 29768. Up to 3653 conditions per place. [2022-11-23 02:48:37,722 INFO L137 encePairwiseOnDemand]: 387/396 looper letters, 200 selfloop transitions, 41 changer transitions 0/241 dead transitions. [2022-11-23 02:48:37,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 241 transitions, 2135 flow [2022-11-23 02:48:37,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 02:48:37,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-23 02:48:37,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2578 transitions. [2022-11-23 02:48:37,729 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40688131313131315 [2022-11-23 02:48:37,729 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2578 transitions. [2022-11-23 02:48:37,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2578 transitions. [2022-11-23 02:48:37,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:48:37,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2578 transitions. [2022-11-23 02:48:37,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 161.125) internal successors, (2578), 16 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:37,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 396.0) internal successors, (6732), 17 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:37,747 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 396.0) internal successors, (6732), 17 states have internal predecessors, (6732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:37,747 INFO L175 Difference]: Start difference. First operand has 98 places, 88 transitions, 874 flow. Second operand 16 states and 2578 transitions. [2022-11-23 02:48:37,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 241 transitions, 2135 flow [2022-11-23 02:48:37,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 241 transitions, 2038 flow, removed 18 selfloop flow, removed 6 redundant places. [2022-11-23 02:48:37,810 INFO L231 Difference]: Finished difference. Result has 112 places, 98 transitions, 1072 flow [2022-11-23 02:48:37,810 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1072, PETRI_PLACES=112, PETRI_TRANSITIONS=98} [2022-11-23 02:48:37,811 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2022-11-23 02:48:37,811 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 98 transitions, 1072 flow [2022-11-23 02:48:37,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 152.25) internal successors, (1218), 8 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:37,811 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:48:37,812 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:48:37,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:48:38,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:48:38,024 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:48:38,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:48:38,024 INFO L85 PathProgramCache]: Analyzing trace with hash 349716255, now seen corresponding path program 1 times [2022-11-23 02:48:38,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:48:38,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248433115] [2022-11-23 02:48:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:48:38,025 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 [2022-11-23 02:48:38,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:48:38,026 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:48:38,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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 [2022-11-23 02:48:38,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:48:38,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 02:48:38,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:48:38,159 INFO L350 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 [2022-11-23 02:48:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:48:38,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:48:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:48:39,197 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:48:39,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248433115] [2022-11-23 02:48:39,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248433115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:48:39,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:48:39,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-23 02:48:39,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757449605] [2022-11-23 02:48:39,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:48:39,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 02:48:39,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:48:39,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 02:48:39,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 02:48:42,967 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 396 [2022-11-23 02:48:42,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 98 transitions, 1072 flow. Second operand has 12 states, 12 states have (on average 163.5) internal successors, (1962), 12 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:42,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:48:42,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 396 [2022-11-23 02:48:42,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:48:48,434 INFO L130 PetriNetUnfolder]: 11270/20504 cut-off events. [2022-11-23 02:48:48,435 INFO L131 PetriNetUnfolder]: For 60994/60994 co-relation queries the response was YES. [2022-11-23 02:48:48,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74718 conditions, 20504 events. 11270/20504 cut-off events. For 60994/60994 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 168830 event pairs, 428 based on Foata normal form. 780/21284 useless extension candidates. Maximal degree in co-relation 74674. Up to 4459 conditions per place. [2022-11-23 02:48:48,595 INFO L137 encePairwiseOnDemand]: 387/396 looper letters, 152 selfloop transitions, 48 changer transitions 0/200 dead transitions. [2022-11-23 02:48:48,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 200 transitions, 2144 flow [2022-11-23 02:48:48,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 02:48:48,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-23 02:48:48,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1561 transitions. [2022-11-23 02:48:48,599 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43799102132435463 [2022-11-23 02:48:48,599 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1561 transitions. [2022-11-23 02:48:48,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1561 transitions. [2022-11-23 02:48:48,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:48:48,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1561 transitions. [2022-11-23 02:48:48,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 173.44444444444446) internal successors, (1561), 9 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:48,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:48,608 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:48,608 INFO L175 Difference]: Start difference. First operand has 112 places, 98 transitions, 1072 flow. Second operand 9 states and 1561 transitions. [2022-11-23 02:48:48,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 200 transitions, 2144 flow [2022-11-23 02:48:48,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 200 transitions, 2054 flow, removed 31 selfloop flow, removed 6 redundant places. [2022-11-23 02:48:48,719 INFO L231 Difference]: Finished difference. Result has 119 places, 110 transitions, 1291 flow [2022-11-23 02:48:48,719 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=1030, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1291, PETRI_PLACES=119, PETRI_TRANSITIONS=110} [2022-11-23 02:48:48,720 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2022-11-23 02:48:48,720 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 110 transitions, 1291 flow [2022-11-23 02:48:48,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.5) internal successors, (1962), 12 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:48,721 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:48:48,721 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:48:48,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-23 02:48:48,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:48:48,935 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:48:48,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:48:48,935 INFO L85 PathProgramCache]: Analyzing trace with hash 349716148, now seen corresponding path program 1 times [2022-11-23 02:48:48,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:48:48,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624748949] [2022-11-23 02:48:48,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:48:48,936 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 [2022-11-23 02:48:48,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:48:48,937 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:48:48,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-23 02:48:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:48:49,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 02:48:49,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:48:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:48:49,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:48:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:48:49,357 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:48:49,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624748949] [2022-11-23 02:48:49,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624748949] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:48:49,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:48:49,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-23 02:48:49,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254924916] [2022-11-23 02:48:49,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:48:49,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 02:48:49,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:48:49,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 02:48:49,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-23 02:48:50,388 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 396 [2022-11-23 02:48:50,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 110 transitions, 1291 flow. Second operand has 10 states, 10 states have (on average 164.8) internal successors, (1648), 10 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:50,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:48:50,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 396 [2022-11-23 02:48:50,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:48:54,856 INFO L130 PetriNetUnfolder]: 9778/17902 cut-off events. [2022-11-23 02:48:54,856 INFO L131 PetriNetUnfolder]: For 74305/74305 co-relation queries the response was YES. [2022-11-23 02:48:54,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71986 conditions, 17902 events. 9778/17902 cut-off events. For 74305/74305 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 145811 event pairs, 1562 based on Foata normal form. 268/18170 useless extension candidates. Maximal degree in co-relation 71936. Up to 12624 conditions per place. [2022-11-23 02:48:55,152 INFO L137 encePairwiseOnDemand]: 387/396 looper letters, 162 selfloop transitions, 23 changer transitions 0/185 dead transitions. [2022-11-23 02:48:55,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 185 transitions, 2143 flow [2022-11-23 02:48:55,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 02:48:55,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-23 02:48:55,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1557 transitions. [2022-11-23 02:48:55,155 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43686868686868685 [2022-11-23 02:48:55,155 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1557 transitions. [2022-11-23 02:48:55,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1557 transitions. [2022-11-23 02:48:55,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:48:55,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1557 transitions. [2022-11-23 02:48:55,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 173.0) internal successors, (1557), 9 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:55,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:55,163 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:55,163 INFO L175 Difference]: Start difference. First operand has 119 places, 110 transitions, 1291 flow. Second operand 9 states and 1557 transitions. [2022-11-23 02:48:55,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 185 transitions, 2143 flow [2022-11-23 02:48:55,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 185 transitions, 2066 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-23 02:48:55,361 INFO L231 Difference]: Finished difference. Result has 126 places, 114 transitions, 1372 flow [2022-11-23 02:48:55,361 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1372, PETRI_PLACES=126, PETRI_TRANSITIONS=114} [2022-11-23 02:48:55,362 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2022-11-23 02:48:55,362 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 114 transitions, 1372 flow [2022-11-23 02:48:55,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 164.8) internal successors, (1648), 10 states have internal predecessors, (1648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:48:55,362 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:48:55,362 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:48:55,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-23 02:48:55,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:48:55,563 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:48:55,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:48:55,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1651520901, now seen corresponding path program 2 times [2022-11-23 02:48:55,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:48:55,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [658118595] [2022-11-23 02:48:55,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:48:55,564 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 [2022-11-23 02:48:55,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:48:55,565 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:48:55,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-23 02:48:55,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:48:55,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:48:55,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 02:48:55,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:48:55,787 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-23 02:48:55,788 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-23 02:48:55,852 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 02:48:55,852 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 02:48:55,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:48:55,946 INFO L350 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 12 treesize of output 14 [2022-11-23 02:48:55,956 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:48:55,956 INFO L350 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 [2022-11-23 02:48:56,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:48:56,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:49:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:49:00,930 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:49:00,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [658118595] [2022-11-23 02:49:00,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [658118595] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:49:00,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:49:00,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-23 02:49:00,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677441005] [2022-11-23 02:49:00,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:49:00,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 02:49:00,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:49:00,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 02:49:00,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=99, Unknown=1, NotChecked=0, Total=132 [2022-11-23 02:49:03,171 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 [1] [2022-11-23 02:49:05,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:49:08,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:49:11,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:49:19,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:49:22,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:49:25,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:49:25,055 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 396 [2022-11-23 02:49:25,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 114 transitions, 1372 flow. Second operand has 12 states, 12 states have (on average 149.66666666666666) internal successors, (1796), 12 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:25,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:49:25,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 396 [2022-11-23 02:49:25,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:49:31,796 INFO L130 PetriNetUnfolder]: 9619/17725 cut-off events. [2022-11-23 02:49:31,796 INFO L131 PetriNetUnfolder]: For 80475/80475 co-relation queries the response was YES. [2022-11-23 02:49:31,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72672 conditions, 17725 events. 9619/17725 cut-off events. For 80475/80475 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 145605 event pairs, 1556 based on Foata normal form. 198/17923 useless extension candidates. Maximal degree in co-relation 72619. Up to 6394 conditions per place. [2022-11-23 02:49:31,958 INFO L137 encePairwiseOnDemand]: 388/396 looper letters, 259 selfloop transitions, 37 changer transitions 0/296 dead transitions. [2022-11-23 02:49:31,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 296 transitions, 2997 flow [2022-11-23 02:49:31,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 02:49:31,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-23 02:49:31,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2272 transitions. [2022-11-23 02:49:31,963 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4098124098124098 [2022-11-23 02:49:31,963 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2272 transitions. [2022-11-23 02:49:31,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2272 transitions. [2022-11-23 02:49:31,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:49:31,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2272 transitions. [2022-11-23 02:49:31,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 162.28571428571428) internal successors, (2272), 14 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:31,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 396.0) internal successors, (5940), 15 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:31,976 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 396.0) internal successors, (5940), 15 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:31,977 INFO L175 Difference]: Start difference. First operand has 126 places, 114 transitions, 1372 flow. Second operand 14 states and 2272 transitions. [2022-11-23 02:49:31,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 296 transitions, 2997 flow [2022-11-23 02:49:32,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 296 transitions, 2992 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-23 02:49:32,204 INFO L231 Difference]: Finished difference. Result has 141 places, 121 transitions, 1543 flow [2022-11-23 02:49:32,204 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1543, PETRI_PLACES=141, PETRI_TRANSITIONS=121} [2022-11-23 02:49:32,204 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2022-11-23 02:49:32,204 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 121 transitions, 1543 flow [2022-11-23 02:49:32,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 149.66666666666666) internal successors, (1796), 12 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:32,205 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:49:32,206 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:49:32,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-23 02:49:32,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:49:32,407 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:49:32,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:49:32,408 INFO L85 PathProgramCache]: Analyzing trace with hash -2039794857, now seen corresponding path program 1 times [2022-11-23 02:49:32,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:49:32,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171885630] [2022-11-23 02:49:32,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:49:32,408 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 [2022-11-23 02:49:32,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:49:32,409 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:49:32,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-23 02:49:32,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:49:32,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 02:49:32,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:49:32,587 INFO L350 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 [2022-11-23 02:49:32,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:49:32,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:49:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:49:33,663 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:49:33,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171885630] [2022-11-23 02:49:33,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171885630] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:49:33,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:49:33,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-23 02:49:33,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846272371] [2022-11-23 02:49:33,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:49:33,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 02:49:33,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:49:33,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 02:49:33,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-23 02:49:36,973 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 396 [2022-11-23 02:49:36,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 121 transitions, 1543 flow. Second operand has 10 states, 10 states have (on average 166.0) internal successors, (1660), 10 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:36,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:49:36,975 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 396 [2022-11-23 02:49:36,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:49:46,247 INFO L130 PetriNetUnfolder]: 18303/32899 cut-off events. [2022-11-23 02:49:46,247 INFO L131 PetriNetUnfolder]: For 152603/152603 co-relation queries the response was YES. [2022-11-23 02:49:46,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147695 conditions, 32899 events. 18303/32899 cut-off events. For 152603/152603 co-relation queries the response was YES. Maximal size of possible extension queue 1253. Compared 288322 event pairs, 3915 based on Foata normal form. 2220/35119 useless extension candidates. Maximal degree in co-relation 147638. Up to 8981 conditions per place. [2022-11-23 02:49:46,563 INFO L137 encePairwiseOnDemand]: 390/396 looper letters, 183 selfloop transitions, 50 changer transitions 0/233 dead transitions. [2022-11-23 02:49:46,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 233 transitions, 3139 flow [2022-11-23 02:49:46,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 02:49:46,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-23 02:49:46,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1560 transitions. [2022-11-23 02:49:46,567 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4377104377104377 [2022-11-23 02:49:46,567 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1560 transitions. [2022-11-23 02:49:46,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1560 transitions. [2022-11-23 02:49:46,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:49:46,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1560 transitions. [2022-11-23 02:49:46,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 173.33333333333334) internal successors, (1560), 9 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:46,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:46,573 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:46,573 INFO L175 Difference]: Start difference. First operand has 141 places, 121 transitions, 1543 flow. Second operand 9 states and 1560 transitions. [2022-11-23 02:49:46,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 233 transitions, 3139 flow [2022-11-23 02:49:47,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 233 transitions, 3028 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-11-23 02:49:47,243 INFO L231 Difference]: Finished difference. Result has 148 places, 125 transitions, 1682 flow [2022-11-23 02:49:47,244 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=1500, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1682, PETRI_PLACES=148, PETRI_TRANSITIONS=125} [2022-11-23 02:49:47,244 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2022-11-23 02:49:47,244 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 125 transitions, 1682 flow [2022-11-23 02:49:47,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 166.0) internal successors, (1660), 10 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:47,245 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:49:47,245 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:49:47,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-23 02:49:47,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:49:47,451 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:49:47,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:49:47,451 INFO L85 PathProgramCache]: Analyzing trace with hash -2039794821, now seen corresponding path program 1 times [2022-11-23 02:49:47,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:49:47,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1962163609] [2022-11-23 02:49:47,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:49:47,452 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 [2022-11-23 02:49:47,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:49:47,453 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:49:47,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-23 02:49:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:49:47,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 02:49:47,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:49:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:49:47,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:49:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:49:47,955 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:49:47,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1962163609] [2022-11-23 02:49:47,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1962163609] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:49:47,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:49:47,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-23 02:49:47,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006489086] [2022-11-23 02:49:47,955 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:49:47,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 02:49:47,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:49:47,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 02:49:47,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-23 02:49:49,061 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 396 [2022-11-23 02:49:49,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 125 transitions, 1682 flow. Second operand has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:49,063 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:49:49,063 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 396 [2022-11-23 02:49:49,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:49:56,096 INFO L130 PetriNetUnfolder]: 15999/28813 cut-off events. [2022-11-23 02:49:56,096 INFO L131 PetriNetUnfolder]: For 170275/170275 co-relation queries the response was YES. [2022-11-23 02:49:56,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139285 conditions, 28813 events. 15999/28813 cut-off events. For 170275/170275 co-relation queries the response was YES. Maximal size of possible extension queue 1095. Compared 251905 event pairs, 3915 based on Foata normal form. 324/29137 useless extension candidates. Maximal degree in co-relation 139223. Up to 19028 conditions per place. [2022-11-23 02:49:56,386 INFO L137 encePairwiseOnDemand]: 388/396 looper letters, 163 selfloop transitions, 29 changer transitions 0/192 dead transitions. [2022-11-23 02:49:56,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 192 transitions, 2464 flow [2022-11-23 02:49:56,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 02:49:56,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-23 02:49:56,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1552 transitions. [2022-11-23 02:49:56,390 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43546576879910215 [2022-11-23 02:49:56,390 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1552 transitions. [2022-11-23 02:49:56,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1552 transitions. [2022-11-23 02:49:56,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:49:56,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1552 transitions. [2022-11-23 02:49:56,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 172.44444444444446) internal successors, (1552), 9 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:56,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:56,393 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:56,394 INFO L175 Difference]: Start difference. First operand has 148 places, 125 transitions, 1682 flow. Second operand 9 states and 1552 transitions. [2022-11-23 02:49:56,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 192 transitions, 2464 flow [2022-11-23 02:49:58,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 192 transitions, 2323 flow, removed 17 selfloop flow, removed 6 redundant places. [2022-11-23 02:49:58,232 INFO L231 Difference]: Finished difference. Result has 151 places, 124 transitions, 1594 flow [2022-11-23 02:49:58,233 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=1526, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1594, PETRI_PLACES=151, PETRI_TRANSITIONS=124} [2022-11-23 02:49:58,233 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2022-11-23 02:49:58,233 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 124 transitions, 1594 flow [2022-11-23 02:49:58,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:49:58,234 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:49:58,234 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:49:58,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-23 02:49:58,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:49:58,447 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:49:58,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:49:58,447 INFO L85 PathProgramCache]: Analyzing trace with hash -338553142, now seen corresponding path program 2 times [2022-11-23 02:49:58,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:49:58,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281803928] [2022-11-23 02:49:58,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:49:58,448 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 [2022-11-23 02:49:58,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:49:58,449 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:49:58,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-23 02:49:58,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:49:58,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:49:58,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 02:49:58,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:49:58,691 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-23 02:49:58,691 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-23 02:49:58,764 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 02:49:58,765 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 02:49:58,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:49:58,860 INFO L350 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 12 treesize of output 14 [2022-11-23 02:49:58,875 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:49:58,875 INFO L350 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 [2022-11-23 02:49:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:49:59,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:50:04,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:50:04,098 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:50:04,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281803928] [2022-11-23 02:50:04,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281803928] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:50:04,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:50:04,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-23 02:50:04,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539353724] [2022-11-23 02:50:04,099 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:50:04,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 02:50:04,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:50:04,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 02:50:04,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-23 02:50:11,726 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 396 [2022-11-23 02:50:11,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 124 transitions, 1594 flow. Second operand has 12 states, 12 states have (on average 155.83333333333334) internal successors, (1870), 12 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:11,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:50:11,728 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 396 [2022-11-23 02:50:11,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:50:19,927 INFO L130 PetriNetUnfolder]: 14392/26052 cut-off events. [2022-11-23 02:50:19,927 INFO L131 PetriNetUnfolder]: For 167268/167268 co-relation queries the response was YES. [2022-11-23 02:50:20,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113401 conditions, 26052 events. 14392/26052 cut-off events. For 167268/167268 co-relation queries the response was YES. Maximal size of possible extension queue 989. Compared 225334 event pairs, 3168 based on Foata normal form. 1154/27206 useless extension candidates. Maximal degree in co-relation 113340. Up to 14787 conditions per place. [2022-11-23 02:50:20,205 INFO L137 encePairwiseOnDemand]: 390/396 looper letters, 231 selfloop transitions, 37 changer transitions 0/268 dead transitions. [2022-11-23 02:50:20,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 268 transitions, 3049 flow [2022-11-23 02:50:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 02:50:20,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-23 02:50:20,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1851 transitions. [2022-11-23 02:50:20,210 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.424931129476584 [2022-11-23 02:50:20,210 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1851 transitions. [2022-11-23 02:50:20,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1851 transitions. [2022-11-23 02:50:20,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:50:20,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1851 transitions. [2022-11-23 02:50:20,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 168.27272727272728) internal successors, (1851), 11 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:20,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 396.0) internal successors, (4752), 12 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:20,214 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 396.0) internal successors, (4752), 12 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:20,215 INFO L175 Difference]: Start difference. First operand has 151 places, 124 transitions, 1594 flow. Second operand 11 states and 1851 transitions. [2022-11-23 02:50:20,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 268 transitions, 3049 flow [2022-11-23 02:50:21,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 268 transitions, 3020 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-11-23 02:50:21,082 INFO L231 Difference]: Finished difference. Result has 162 places, 128 transitions, 1730 flow [2022-11-23 02:50:21,082 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=1556, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1730, PETRI_PLACES=162, PETRI_TRANSITIONS=128} [2022-11-23 02:50:21,082 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2022-11-23 02:50:21,082 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 128 transitions, 1730 flow [2022-11-23 02:50:21,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 155.83333333333334) internal successors, (1870), 12 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:21,083 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:50:21,083 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-11-23 02:50:21,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-23 02:50:21,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:50:21,283 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:50:21,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:50:21,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1767629903, now seen corresponding path program 3 times [2022-11-23 02:50:21,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:50:21,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532189818] [2022-11-23 02:50:21,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:50:21,284 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 [2022-11-23 02:50:21,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:50:21,285 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:50:21,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-23 02:50:21,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-23 02:50:21,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:50:21,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 02:50:21,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:50:21,567 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 02:50:21,568 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 02:50:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:22,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:50:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:50:25,248 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:50:25,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532189818] [2022-11-23 02:50:25,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532189818] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:50:25,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:50:25,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-23 02:50:25,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926283110] [2022-11-23 02:50:25,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:50:25,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 02:50:25,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:50:25,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 02:50:25,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-23 02:50:49,359 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 396 [2022-11-23 02:50:49,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 128 transitions, 1730 flow. Second operand has 24 states, 24 states have (on average 163.0) internal successors, (3912), 24 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:50:49,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:50:49,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 396 [2022-11-23 02:50:49,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:50:59,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:51:01,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:51:03,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:51:05,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:51:07,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:51:09,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:51:11,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:51:13,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:51:15,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:51:17,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 02:51:37,681 INFO L130 PetriNetUnfolder]: 19165/34683 cut-off events. [2022-11-23 02:51:37,681 INFO L131 PetriNetUnfolder]: For 267219/267219 co-relation queries the response was YES. [2022-11-23 02:51:37,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159720 conditions, 34683 events. 19165/34683 cut-off events. For 267219/267219 co-relation queries the response was YES. Maximal size of possible extension queue 1130. Compared 304050 event pairs, 15659 based on Foata normal form. 24/34707 useless extension candidates. Maximal degree in co-relation 159654. Up to 5488 conditions per place. [2022-11-23 02:51:38,074 INFO L137 encePairwiseOnDemand]: 389/396 looper letters, 540 selfloop transitions, 72 changer transitions 0/612 dead transitions. [2022-11-23 02:51:38,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 612 transitions, 8213 flow [2022-11-23 02:51:38,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 02:51:38,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-23 02:51:38,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4206 transitions. [2022-11-23 02:51:38,080 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.442550505050505 [2022-11-23 02:51:38,080 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4206 transitions. [2022-11-23 02:51:38,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4206 transitions. [2022-11-23 02:51:38,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:51:38,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4206 transitions. [2022-11-23 02:51:38,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 175.25) internal successors, (4206), 24 states have internal predecessors, (4206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:38,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 396.0) internal successors, (9900), 25 states have internal predecessors, (9900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:38,090 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 396.0) internal successors, (9900), 25 states have internal predecessors, (9900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:38,091 INFO L175 Difference]: Start difference. First operand has 162 places, 128 transitions, 1730 flow. Second operand 24 states and 4206 transitions. [2022-11-23 02:51:38,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 612 transitions, 8213 flow [2022-11-23 02:51:39,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 612 transitions, 7860 flow, removed 24 selfloop flow, removed 7 redundant places. [2022-11-23 02:51:39,166 INFO L231 Difference]: Finished difference. Result has 191 places, 159 transitions, 2240 flow [2022-11-23 02:51:39,166 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=1632, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2240, PETRI_PLACES=191, PETRI_TRANSITIONS=159} [2022-11-23 02:51:39,167 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2022-11-23 02:51:39,167 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 159 transitions, 2240 flow [2022-11-23 02:51:39,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 163.0) internal successors, (3912), 24 states have internal predecessors, (3912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:39,167 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:51:39,167 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:51:39,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-23 02:51:39,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:51:39,368 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:51:39,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:51:39,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1905209727, now seen corresponding path program 3 times [2022-11-23 02:51:39,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:51:39,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629895471] [2022-11-23 02:51:39,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:51:39,369 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 [2022-11-23 02:51:39,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:51:39,370 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:51:39,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-23 02:51:39,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 02:51:39,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:51:39,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 02:51:39,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:51:39,637 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 02:51:39,637 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 02:51:39,705 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 02:51:39,705 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 02:51:39,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 02:51:39,795 INFO L350 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 14 treesize of output 16 [2022-11-23 02:51:39,812 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:51:39,812 INFO L350 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 [2022-11-23 02:51:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 02:51:40,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:51:41,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 02:51:41,164 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:51:41,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629895471] [2022-11-23 02:51:41,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629895471] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:51:41,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:51:41,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-23 02:51:41,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799535859] [2022-11-23 02:51:41,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:51:41,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 02:51:41,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:51:41,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 02:51:41,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-23 02:51:43,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:51:52,166 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 396 [2022-11-23 02:51:52,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 159 transitions, 2240 flow. Second operand has 10 states, 10 states have (on average 161.2) internal successors, (1612), 10 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:51:52,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:51:52,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 396 [2022-11-23 02:51:52,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:52:03,955 INFO L130 PetriNetUnfolder]: 23760/43560 cut-off events. [2022-11-23 02:52:03,955 INFO L131 PetriNetUnfolder]: For 276338/276338 co-relation queries the response was YES. [2022-11-23 02:52:04,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173390 conditions, 43560 events. 23760/43560 cut-off events. For 276338/276338 co-relation queries the response was YES. Maximal size of possible extension queue 1381. Compared 395515 event pairs, 4212 based on Foata normal form. 3080/46640 useless extension candidates. Maximal degree in co-relation 173312. Up to 10183 conditions per place. [2022-11-23 02:52:04,564 INFO L137 encePairwiseOnDemand]: 392/396 looper letters, 251 selfloop transitions, 44 changer transitions 0/295 dead transitions. [2022-11-23 02:52:04,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 295 transitions, 4002 flow [2022-11-23 02:52:04,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 02:52:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-23 02:52:04,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1540 transitions. [2022-11-23 02:52:04,568 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43209876543209874 [2022-11-23 02:52:04,568 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1540 transitions. [2022-11-23 02:52:04,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1540 transitions. [2022-11-23 02:52:04,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:52:04,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1540 transitions. [2022-11-23 02:52:04,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 171.11111111111111) internal successors, (1540), 9 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:04,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:04,573 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 396.0) internal successors, (3960), 10 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:04,573 INFO L175 Difference]: Start difference. First operand has 191 places, 159 transitions, 2240 flow. Second operand 9 states and 1540 transitions. [2022-11-23 02:52:04,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 295 transitions, 4002 flow [2022-11-23 02:52:05,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 295 transitions, 3765 flow, removed 39 selfloop flow, removed 21 redundant places. [2022-11-23 02:52:05,589 INFO L231 Difference]: Finished difference. Result has 180 places, 160 transitions, 2085 flow [2022-11-23 02:52:05,589 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=1975, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2085, PETRI_PLACES=180, PETRI_TRANSITIONS=160} [2022-11-23 02:52:05,589 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2022-11-23 02:52:05,590 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 160 transitions, 2085 flow [2022-11-23 02:52:05,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 161.2) internal successors, (1612), 10 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:52:05,590 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:52:05,590 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-23 02:52:05,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-23 02:52:05,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:52:05,791 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:52:05,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:52:05,791 INFO L85 PathProgramCache]: Analyzing trace with hash -2026293954, now seen corresponding path program 3 times [2022-11-23 02:52:05,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:52:05,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969249019] [2022-11-23 02:52:05,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:52:05,792 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 [2022-11-23 02:52:05,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:52:05,793 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:52:05,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-23 02:52:05,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 02:52:05,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:52:05,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 02:52:05,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:52:06,058 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 02:52:06,058 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 02:52:06,130 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 02:52:06,130 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 02:52:06,296 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 02:52:06,296 INFO L350 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 [2022-11-23 02:52:06,306 INFO L350 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 21 treesize of output 21 [2022-11-23 02:52:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:52:06,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:52:10,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:52:10,026 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:52:10,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969249019] [2022-11-23 02:52:10,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969249019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:52:10,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:52:10,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-23 02:52:10,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633473053] [2022-11-23 02:52:10,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:52:10,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 02:52:10,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:52:10,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 02:52:10,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-23 02:52:27,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:52:49,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:53:00,640 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 396 [2022-11-23 02:53:00,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 160 transitions, 2085 flow. Second operand has 16 states, 16 states have (on average 146.375) internal successors, (2342), 16 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:53:00,642 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:53:00,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 396 [2022-11-23 02:53:00,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 02:53:07,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:53:24,239 WARN L233 SmtUtils]: Spent 5.07s on a formula simplification. DAG size of input: 58 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 02:53:38,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 02:53:50,498 INFO L130 PetriNetUnfolder]: 26822/49278 cut-off events. [2022-11-23 02:53:50,499 INFO L131 PetriNetUnfolder]: For 196312/196312 co-relation queries the response was YES. [2022-11-23 02:53:51,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197556 conditions, 49278 events. 26822/49278 cut-off events. For 196312/196312 co-relation queries the response was YES. Maximal size of possible extension queue 1592. Compared 461854 event pairs, 13461 based on Foata normal form. 294/49572 useless extension candidates. Maximal degree in co-relation 197486. Up to 14963 conditions per place. [2022-11-23 02:53:51,165 INFO L137 encePairwiseOnDemand]: 382/396 looper letters, 366 selfloop transitions, 147 changer transitions 0/513 dead transitions. [2022-11-23 02:53:51,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 513 transitions, 5948 flow [2022-11-23 02:53:51,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 02:53:51,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-23 02:53:51,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3883 transitions. [2022-11-23 02:53:51,204 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39222222222222225 [2022-11-23 02:53:51,204 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3883 transitions. [2022-11-23 02:53:51,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3883 transitions. [2022-11-23 02:53:51,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 02:53:51,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3883 transitions. [2022-11-23 02:53:51,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 155.32) internal successors, (3883), 25 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:53:51,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 396.0) internal successors, (10296), 26 states have internal predecessors, (10296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:53:51,228 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 396.0) internal successors, (10296), 26 states have internal predecessors, (10296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:53:51,228 INFO L175 Difference]: Start difference. First operand has 180 places, 160 transitions, 2085 flow. Second operand 25 states and 3883 transitions. [2022-11-23 02:53:51,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 513 transitions, 5948 flow [2022-11-23 02:53:52,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 513 transitions, 5688 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-11-23 02:53:52,167 INFO L231 Difference]: Finished difference. Result has 208 places, 250 transitions, 3642 flow [2022-11-23 02:53:52,167 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=396, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3642, PETRI_PLACES=208, PETRI_TRANSITIONS=250} [2022-11-23 02:53:52,168 INFO L288 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2022-11-23 02:53:52,168 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 250 transitions, 3642 flow [2022-11-23 02:53:52,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 146.375) internal successors, (2342), 16 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:53:52,169 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 02:53:52,169 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:53:52,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-23 02:53:52,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 02:53:52,374 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 02:53:52,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:53:52,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1684363846, now seen corresponding path program 1 times [2022-11-23 02:53:52,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-23 02:53:52,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018475888] [2022-11-23 02:53:52,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:53:52,375 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 [2022-11-23 02:53:52,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat [2022-11-23 02:53:52,376 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -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) [2022-11-23 02:53:52,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_95852e62-6e19-4a02-9b47-b21c7643a523/bin/uautomizer-QkZJyEgLgS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-23 02:53:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:53:52,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 02:53:52,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:53:52,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:53:52,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:53:52,610 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-23 02:53:52,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018475888] [2022-11-23 02:53:52,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018475888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:53:52,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:53:52,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 02:53:52,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121229458] [2022-11-23 02:53:52,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:53:52,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 02:53:52,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-23 02:53:52,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 02:53:52,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 02:53:52,755 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 396 [2022-11-23 02:53:52,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 250 transitions, 3642 flow. Second operand has 3 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:53:52,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 02:53:52,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 396 [2022-11-23 02:53:52,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand