./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8 --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 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b --- 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-2329fc7 [2022-12-13 22:22:56,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 22:22:56,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 22:22:56,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 22:22:56,638 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 22:22:56,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 22:22:56,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 22:22:56,642 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 22:22:56,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 22:22:56,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 22:22:56,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 22:22:56,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 22:22:56,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 22:22:56,648 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 22:22:56,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 22:22:56,650 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 22:22:56,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 22:22:56,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 22:22:56,653 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 22:22:56,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 22:22:56,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 22:22:56,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 22:22:56,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 22:22:56,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 22:22:56,663 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 22:22:56,663 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 22:22:56,664 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 22:22:56,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 22:22:56,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 22:22:56,666 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 22:22:56,666 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 22:22:56,667 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 22:22:56,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 22:22:56,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 22:22:56,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 22:22:56,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 22:22:56,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 22:22:56,671 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 22:22:56,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 22:22:56,672 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 22:22:56,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 22:22:56,673 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 22:22:56,688 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 22:22:56,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 22:22:56,689 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 22:22:56,689 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 22:22:56,689 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 22:22:56,690 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 22:22:56,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 22:22:56,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 22:22:56,690 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 22:22:56,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 22:22:56,691 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 22:22:56,691 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 22:22:56,691 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 22:22:56,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 22:22:56,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 22:22:56,692 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 22:22:56,692 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 22:22:56,692 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 22:22:56,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 22:22:56,692 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 22:22:56,692 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 22:22:56,693 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 22:22:56,693 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 22:22:56,693 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 22:22:56,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 22:22:56,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:22:56,694 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 22:22:56,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 22:22:56,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 22:22:56,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 22:22:56,694 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 22:22:56,694 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 22:22:56,695 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 22:22:56,695 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 22:22:56,695 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_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b [2022-12-13 22:22:56,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 22:22:56,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 22:22:56,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 22:22:56,874 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 22:22:56,874 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 22:22:56,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2022-12-13 22:22:59,463 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 22:22:59,623 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 22:22:59,623 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2022-12-13 22:22:59,629 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/data/96dfacc53/c141b0fd89014e769164fcb798a74412/FLAG3eb6f2e6c [2022-12-13 22:22:59,639 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/data/96dfacc53/c141b0fd89014e769164fcb798a74412 [2022-12-13 22:22:59,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 22:22:59,643 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 22:22:59,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 22:22:59,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 22:22:59,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 22:22:59,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:22:59" (1/1) ... [2022-12-13 22:22:59,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19df2093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:59, skipping insertion in model container [2022-12-13 22:22:59,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:22:59" (1/1) ... [2022-12-13 22:22:59,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 22:22:59,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 22:22:59,790 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_f8e98943-b25c-42d5-b552-6d5837349505/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3034,3047] [2022-12-13 22:22:59,797 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:22:59,805 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) [2022-12-13 22:22:59,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1f95987f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:22:59, skipping insertion in model container [2022-12-13 22:22:59,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 22:22:59,806 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 22:22:59,808 INFO L158 Benchmark]: Toolchain (without parser) took 164.29ms. Allocated memory is still 113.2MB. Free memory was 79.5MB in the beginning and 69.8MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 22:22:59,808 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 113.2MB. Free memory is still 87.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 22:22:59,809 INFO L158 Benchmark]: CACSL2BoogieTranslator took 162.63ms. Allocated memory is still 113.2MB. Free memory was 79.5MB in the beginning and 69.8MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 22:22:59,810 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 113.2MB. Free memory is still 87.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 162.63ms. Allocated memory is still 113.2MB. Free memory was 79.5MB in the beginning and 69.8MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: 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_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8 --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 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b --- 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-2329fc7 [2022-12-13 22:23:01,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 22:23:01,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 22:23:01,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 22:23:01,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 22:23:01,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 22:23:01,170 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 22:23:01,171 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 22:23:01,172 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 22:23:01,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 22:23:01,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 22:23:01,174 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 22:23:01,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 22:23:01,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 22:23:01,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 22:23:01,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 22:23:01,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 22:23:01,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 22:23:01,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 22:23:01,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 22:23:01,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 22:23:01,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 22:23:01,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 22:23:01,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 22:23:01,185 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 22:23:01,185 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 22:23:01,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 22:23:01,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 22:23:01,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 22:23:01,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 22:23:01,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 22:23:01,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 22:23:01,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 22:23:01,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 22:23:01,194 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 22:23:01,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 22:23:01,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 22:23:01,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 22:23:01,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 22:23:01,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 22:23:01,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 22:23:01,198 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 22:23:01,220 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 22:23:01,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 22:23:01,221 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 22:23:01,221 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 22:23:01,221 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 22:23:01,222 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 22:23:01,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 22:23:01,222 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 22:23:01,222 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 22:23:01,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 22:23:01,223 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 22:23:01,223 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 22:23:01,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 22:23:01,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 22:23:01,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 22:23:01,223 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 22:23:01,223 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 22:23:01,223 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 22:23:01,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 22:23:01,224 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 22:23:01,224 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 22:23:01,224 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 22:23:01,224 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 22:23:01,224 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 22:23:01,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 22:23:01,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 22:23:01,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 22:23:01,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:23:01,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 22:23:01,225 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 22:23:01,225 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 22:23:01,225 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 22:23:01,225 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 22:23:01,225 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 22:23:01,226 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 22:23:01,226 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 22:23:01,226 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 22:23:01,226 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_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 795c382fbb0026f2f6f7212254176553809c7311a8058a10cea47f6b1b03373b [2022-12-13 22:23:01,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 22:23:01,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 22:23:01,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 22:23:01,471 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 22:23:01,472 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 22:23:01,473 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2022-12-13 22:23:04,012 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 22:23:04,147 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 22:23:04,147 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2022-12-13 22:23:04,153 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/data/b5d691466/28de4e22337b4cf195605d1a4872fd54/FLAGbd12c2030 [2022-12-13 22:23:04,164 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/data/b5d691466/28de4e22337b4cf195605d1a4872fd54 [2022-12-13 22:23:04,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 22:23:04,167 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 22:23:04,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 22:23:04,168 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 22:23:04,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 22:23:04,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:23:04" (1/1) ... [2022-12-13 22:23:04,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3932af3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:23:04, skipping insertion in model container [2022-12-13 22:23:04,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:23:04" (1/1) ... [2022-12-13 22:23:04,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 22:23:04,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 22:23:04,336 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_f8e98943-b25c-42d5-b552-6d5837349505/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3034,3047] [2022-12-13 22:23:04,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:23:04,358 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 22:23:04,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 22:23:04,374 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_f8e98943-b25c-42d5-b552-6d5837349505/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3034,3047] [2022-12-13 22:23:04,378 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:23:04,382 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 22:23:04,402 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_f8e98943-b25c-42d5-b552-6d5837349505/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c[3034,3047] [2022-12-13 22:23:04,405 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:23:04,419 INFO L208 MainTranslator]: Completed translation [2022-12-13 22:23:04,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:23:04 WrapperNode [2022-12-13 22:23:04,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 22:23:04,420 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 22:23:04,420 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 22:23:04,421 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 22:23:04,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:23:04" (1/1) ... [2022-12-13 22:23:04,437 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:23:04" (1/1) ... [2022-12-13 22:23:04,462 INFO L138 Inliner]: procedures = 28, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 265 [2022-12-13 22:23:04,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 22:23:04,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 22:23:04,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 22:23:04,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 22:23:04,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:23:04" (1/1) ... [2022-12-13 22:23:04,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:23:04" (1/1) ... [2022-12-13 22:23:04,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:23:04" (1/1) ... [2022-12-13 22:23:04,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:23:04" (1/1) ... [2022-12-13 22:23:04,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:23:04" (1/1) ... [2022-12-13 22:23:04,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:23:04" (1/1) ... [2022-12-13 22:23:04,489 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:23:04" (1/1) ... [2022-12-13 22:23:04,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:23:04" (1/1) ... [2022-12-13 22:23:04,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 22:23:04,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 22:23:04,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 22:23:04,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 22:23:04,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:23:04" (1/1) ... [2022-12-13 22:23:04,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:23:04,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:23:04,520 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 22:23:04,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 22:23:04,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 22:23:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 22:23:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 22:23:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 22:23:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 22:23:04,559 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 22:23:04,559 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 22:23:04,560 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 22:23:04,560 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 22:23:04,560 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 22:23:04,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 22:23:04,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 22:23:04,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 22:23:04,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 22:23:04,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 22:23:04,567 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 22:23:04,671 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 22:23:04,673 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 22:23:05,242 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 22:23:05,253 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 22:23:05,253 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 22:23:05,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:23:05 BoogieIcfgContainer [2022-12-13 22:23:05,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 22:23:05,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 22:23:05,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 22:23:05,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 22:23:05,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 10:23:04" (1/3) ... [2022-12-13 22:23:05,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@650456b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:23:05, skipping insertion in model container [2022-12-13 22:23:05,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:23:04" (2/3) ... [2022-12-13 22:23:05,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@650456b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:23:05, skipping insertion in model container [2022-12-13 22:23:05,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:23:05" (3/3) ... [2022-12-13 22:23:05,264 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2022-12-13 22:23:05,282 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 22:23:05,282 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-12-13 22:23:05,282 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 22:23:05,396 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 22:23:05,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 366 places, 384 transitions, 792 flow [2022-12-13 22:23:05,561 INFO L130 PetriNetUnfolder]: 28/381 cut-off events. [2022-12-13 22:23:05,561 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 22:23:05,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 381 events. 28/381 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 724 event pairs, 0 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 288. Up to 2 conditions per place. [2022-12-13 22:23:05,570 INFO L82 GeneralOperation]: Start removeDead. Operand has 366 places, 384 transitions, 792 flow [2022-12-13 22:23:05,578 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 358 places, 376 transitions, 770 flow [2022-12-13 22:23:05,582 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 22:23:05,592 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 358 places, 376 transitions, 770 flow [2022-12-13 22:23:05,595 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 358 places, 376 transitions, 770 flow [2022-12-13 22:23:05,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 358 places, 376 transitions, 770 flow [2022-12-13 22:23:05,666 INFO L130 PetriNetUnfolder]: 28/376 cut-off events. [2022-12-13 22:23:05,667 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 22:23:05,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 376 events. 28/376 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 725 event pairs, 0 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 288. Up to 2 conditions per place. [2022-12-13 22:23:05,675 INFO L119 LiptonReduction]: Number of co-enabled transitions 24864 [2022-12-13 22:23:38,702 INFO L134 LiptonReduction]: Checked pairs total: 26486 [2022-12-13 22:23:38,702 INFO L136 LiptonReduction]: Total number of compositions: 455 [2022-12-13 22:23:38,715 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:23:38,722 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;@2c774ef1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:23:38,722 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2022-12-13 22:23:38,724 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 22:23:38,724 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:23:38,724 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:23:38,725 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 22:23:38,725 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:23:38,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:23:38,729 INFO L85 PathProgramCache]: Analyzing trace with hash 48962, now seen corresponding path program 1 times [2022-12-13 22:23:38,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:23:38,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477026424] [2022-12-13 22:23:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:23:38,739 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 [2022-12-13 22:23:38,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:23:38,740 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:23:38,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:23:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:23:38,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 22:23:38,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:23:38,942 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 22:23:38,943 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 22:23:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:23:38,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:23:38,972 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:23:38,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477026424] [2022-12-13 22:23:38,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477026424] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:23:38,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:23:38,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:23:38,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293590265] [2022-12-13 22:23:38,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:23:38,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:23:38,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:23:39,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:23:39,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:23:39,237 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 839 [2022-12-13 22:23:39,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 340.6666666666667) internal successors, (1022), 3 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:39,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:23:39,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 839 [2022-12-13 22:23:39,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:23:40,461 INFO L130 PetriNetUnfolder]: 5952/8295 cut-off events. [2022-12-13 22:23:40,461 INFO L131 PetriNetUnfolder]: For 199/199 co-relation queries the response was YES. [2022-12-13 22:23:40,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16805 conditions, 8295 events. 5952/8295 cut-off events. For 199/199 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 41427 event pairs, 5113 based on Foata normal form. 0/2941 useless extension candidates. Maximal degree in co-relation 15248. Up to 8295 conditions per place. [2022-12-13 22:23:40,494 INFO L137 encePairwiseOnDemand]: 832/839 looper letters, 56 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2022-12-13 22:23:40,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 57 transitions, 246 flow [2022-12-13 22:23:40,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:23:40,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:23:40,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1083 transitions. [2022-12-13 22:23:40,507 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4302741358760429 [2022-12-13 22:23:40,507 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1083 transitions. [2022-12-13 22:23:40,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1083 transitions. [2022-12-13 22:23:40,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:23:40,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1083 transitions. [2022-12-13 22:23:40,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 361.0) internal successors, (1083), 3 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:40,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 839.0) internal successors, (3356), 4 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:40,524 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 839.0) internal successors, (3356), 4 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:40,526 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 144 flow. Second operand 3 states and 1083 transitions. [2022-12-13 22:23:40,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 57 transitions, 246 flow [2022-12-13 22:23:40,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 57 transitions, 234 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 22:23:40,533 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 122 flow [2022-12-13 22:23:40,534 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2022-12-13 22:23:40,537 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, -8 predicate places. [2022-12-13 22:23:40,537 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 122 flow [2022-12-13 22:23:40,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 340.6666666666667) internal successors, (1022), 3 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:40,538 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:23:40,538 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 22:23:40,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-13 22:23:40,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:23:40,739 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:23:40,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:23:40,739 INFO L85 PathProgramCache]: Analyzing trace with hash 48963, now seen corresponding path program 1 times [2022-12-13 22:23:40,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:23:40,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957683766] [2022-12-13 22:23:40,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:23:40,740 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 [2022-12-13 22:23:40,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:23:40,741 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:23:40,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:23:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:23:40,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 22:23:40,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:23:40,909 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 22:23:40,910 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-13 22:23:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:23:40,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:23:40,927 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:23:40,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957683766] [2022-12-13 22:23:40,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957683766] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:23:40,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:23:40,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 22:23:40,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127307614] [2022-12-13 22:23:40,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:23:40,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:23:40,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:23:40,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:23:40,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:23:41,114 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 839 [2022-12-13 22:23:41,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 337.6666666666667) internal successors, (1013), 3 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:41,116 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:23:41,116 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 839 [2022-12-13 22:23:41,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:23:42,786 INFO L130 PetriNetUnfolder]: 11903/16586 cut-off events. [2022-12-13 22:23:42,786 INFO L131 PetriNetUnfolder]: For 80/80 co-relation queries the response was YES. [2022-12-13 22:23:42,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33322 conditions, 16586 events. 11903/16586 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 1183. Compared 91229 event pairs, 10226 based on Foata normal form. 0/5881 useless extension candidates. Maximal degree in co-relation 33316. Up to 8296 conditions per place. [2022-12-13 22:23:42,837 INFO L137 encePairwiseOnDemand]: 830/839 looper letters, 104 selfloop transitions, 6 changer transitions 0/110 dead transitions. [2022-12-13 22:23:42,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 110 transitions, 454 flow [2022-12-13 22:23:42,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:23:42,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:23:42,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1124 transitions. [2022-12-13 22:23:42,840 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44656336909018673 [2022-12-13 22:23:42,840 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1124 transitions. [2022-12-13 22:23:42,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1124 transitions. [2022-12-13 22:23:42,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:23:42,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1124 transitions. [2022-12-13 22:23:42,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:42,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 839.0) internal successors, (3356), 4 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:42,846 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 839.0) internal successors, (3356), 4 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:42,846 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 122 flow. Second operand 3 states and 1124 transitions. [2022-12-13 22:23:42,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 110 transitions, 454 flow [2022-12-13 22:23:42,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 110 transitions, 453 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:23:42,848 INFO L231 Difference]: Finished difference. Result has 60 places, 62 transitions, 171 flow [2022-12-13 22:23:42,849 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=60, PETRI_TRANSITIONS=62} [2022-12-13 22:23:42,849 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, -5 predicate places. [2022-12-13 22:23:42,850 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 62 transitions, 171 flow [2022-12-13 22:23:42,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 337.6666666666667) internal successors, (1013), 3 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:42,850 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:23:42,851 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 22:23:42,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-13 22:23:43,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:23:43,051 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:23:43,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:23:43,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1528469, now seen corresponding path program 1 times [2022-12-13 22:23:43,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:23:43,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409397791] [2022-12-13 22:23:43,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:23:43,052 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:23:43,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:23:43,053 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:23:43,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:23:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:23:43,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 22:23:43,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:23:43,179 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 22:23:43,179 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-13 22:23:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:23:43,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:23:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:23:43,295 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:23:43,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409397791] [2022-12-13 22:23:43,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409397791] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:23:43,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 22:23:43,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 22:23:43,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956161933] [2022-12-13 22:23:43,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 22:23:43,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 22:23:43,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:23:43,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 22:23:43,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 22:23:44,480 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 839 [2022-12-13 22:23:44,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 62 transitions, 171 flow. Second operand has 6 states, 6 states have (on average 332.0) internal successors, (1992), 6 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:44,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:23:44,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 839 [2022-12-13 22:23:44,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:23:50,509 INFO L130 PetriNetUnfolder]: 29756/41459 cut-off events. [2022-12-13 22:23:50,509 INFO L131 PetriNetUnfolder]: For 200/200 co-relation queries the response was YES. [2022-12-13 22:23:50,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83329 conditions, 41459 events. 29756/41459 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 1940. Compared 251651 event pairs, 25565 based on Foata normal form. 0/14716 useless extension candidates. Maximal degree in co-relation 83320. Up to 8297 conditions per place. [2022-12-13 22:23:50,646 INFO L137 encePairwiseOnDemand]: 830/839 looper letters, 248 selfloop transitions, 21 changer transitions 0/269 dead transitions. [2022-12-13 22:23:50,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 269 transitions, 1189 flow [2022-12-13 22:23:50,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 22:23:50,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 22:23:50,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2264 transitions. [2022-12-13 22:23:50,652 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4497417560588002 [2022-12-13 22:23:50,652 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2264 transitions. [2022-12-13 22:23:50,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2264 transitions. [2022-12-13 22:23:50,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:23:50,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2264 transitions. [2022-12-13 22:23:50,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 377.3333333333333) internal successors, (2264), 6 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:50,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 839.0) internal successors, (5873), 7 states have internal predecessors, (5873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:50,662 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 839.0) internal successors, (5873), 7 states have internal predecessors, (5873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:50,663 INFO L175 Difference]: Start difference. First operand has 60 places, 62 transitions, 171 flow. Second operand 6 states and 2264 transitions. [2022-12-13 22:23:50,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 269 transitions, 1189 flow [2022-12-13 22:23:50,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 269 transitions, 1165 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:23:50,666 INFO L231 Difference]: Finished difference. Result has 66 places, 77 transitions, 309 flow [2022-12-13 22:23:50,666 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=309, PETRI_PLACES=66, PETRI_TRANSITIONS=77} [2022-12-13 22:23:50,666 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2022-12-13 22:23:50,667 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 77 transitions, 309 flow [2022-12-13 22:23:50,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 332.0) internal successors, (1992), 6 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:50,667 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:23:50,668 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 22:23:50,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-13 22:23:50,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:23:50,869 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:23:50,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:23:50,869 INFO L85 PathProgramCache]: Analyzing trace with hash 47505388, now seen corresponding path program 1 times [2022-12-13 22:23:50,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:23:50,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416163852] [2022-12-13 22:23:50,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:23:50,870 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 [2022-12-13 22:23:50,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:23:50,871 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:23:50,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:23:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:23:50,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 22:23:50,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:23:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:23:50,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:23:50,996 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:23:50,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416163852] [2022-12-13 22:23:50,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416163852] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:23:50,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:23:50,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:23:50,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499081464] [2022-12-13 22:23:50,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:23:50,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:23:50,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:23:50,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:23:50,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:23:51,066 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 839 [2022-12-13 22:23:51,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 77 transitions, 309 flow. Second operand has 3 states, 3 states have (on average 344.3333333333333) internal successors, (1033), 3 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:51,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:23:51,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 839 [2022-12-13 22:23:51,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:23:53,911 INFO L130 PetriNetUnfolder]: 23805/33171 cut-off events. [2022-12-13 22:23:53,911 INFO L131 PetriNetUnfolder]: For 163/163 co-relation queries the response was YES. [2022-12-13 22:23:53,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66717 conditions, 33171 events. 23805/33171 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 2210. Compared 200853 event pairs, 20452 based on Foata normal form. 3/11778 useless extension candidates. Maximal degree in co-relation 66705. Up to 33163 conditions per place. [2022-12-13 22:23:54,020 INFO L137 encePairwiseOnDemand]: 830/839 looper letters, 63 selfloop transitions, 12 changer transitions 0/75 dead transitions. [2022-12-13 22:23:54,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 451 flow [2022-12-13 22:23:54,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:23:54,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:23:54,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1094 transitions. [2022-12-13 22:23:54,023 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4346444179578864 [2022-12-13 22:23:54,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1094 transitions. [2022-12-13 22:23:54,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1094 transitions. [2022-12-13 22:23:54,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:23:54,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1094 transitions. [2022-12-13 22:23:54,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 364.6666666666667) internal successors, (1094), 3 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:54,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 839.0) internal successors, (3356), 4 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:54,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 839.0) internal successors, (3356), 4 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:54,029 INFO L175 Difference]: Start difference. First operand has 66 places, 77 transitions, 309 flow. Second operand 3 states and 1094 transitions. [2022-12-13 22:23:54,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 451 flow [2022-12-13 22:23:54,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 421 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 22:23:54,031 INFO L231 Difference]: Finished difference. Result has 68 places, 75 transitions, 313 flow [2022-12-13 22:23:54,031 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=313, PETRI_PLACES=68, PETRI_TRANSITIONS=75} [2022-12-13 22:23:54,031 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2022-12-13 22:23:54,031 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 75 transitions, 313 flow [2022-12-13 22:23:54,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 344.3333333333333) internal successors, (1033), 3 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:23:54,032 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:23:54,032 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 22:23:54,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 22:23:54,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:23:54,233 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:23:54,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:23:54,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1699478589, now seen corresponding path program 2 times [2022-12-13 22:23:54,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:23:54,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725557764] [2022-12-13 22:23:54,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:23:54,234 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 [2022-12-13 22:23:54,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:23:54,236 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:23:54,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:23:54,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:23:54,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:23:54,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 22:23:54,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:23:54,416 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 22:23:54,416 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-13 22:23:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:23:54,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:23:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:23:55,052 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:23:55,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725557764] [2022-12-13 22:23:55,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725557764] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:23:55,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 22:23:55,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 22:23:55,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042072023] [2022-12-13 22:23:55,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 22:23:55,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 22:23:55,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:23:55,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 22:23:55,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 22:24:00,910 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 839 [2022-12-13 22:24:00,912 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 75 transitions, 313 flow. Second operand has 12 states, 12 states have (on average 326.0) internal successors, (3912), 12 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) [2022-12-13 22:24:00,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:24:00,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 839 [2022-12-13 22:24:00,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:24:03,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 22:24:05,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 22:24:07,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 22:24:09,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 22:24:10,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 22:24:12,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 22:24:14,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 22:24:15,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 22:24:17,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 22:24:19,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 22:24:20,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 22:24:22,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 22:24:24,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 22:24:31,974 INFO L130 PetriNetUnfolder]: 23812/33198 cut-off events. [2022-12-13 22:24:31,974 INFO L131 PetriNetUnfolder]: For 250/250 co-relation queries the response was YES. [2022-12-13 22:24:32,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66833 conditions, 33198 events. 23812/33198 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 1752. Compared 197467 event pairs, 20452 based on Foata normal form. 26/11830 useless extension candidates. Maximal degree in co-relation 66819. Up to 8292 conditions per place. [2022-12-13 22:24:32,089 INFO L137 encePairwiseOnDemand]: 827/839 looper letters, 198 selfloop transitions, 48 changer transitions 0/246 dead transitions. [2022-12-13 22:24:32,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 246 transitions, 1299 flow [2022-12-13 22:24:32,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 22:24:32,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 22:24:32,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 5155 transitions. [2022-12-13 22:24:32,098 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4096146205800556 [2022-12-13 22:24:32,098 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 5155 transitions. [2022-12-13 22:24:32,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 5155 transitions. [2022-12-13 22:24:32,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:24:32,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 5155 transitions. [2022-12-13 22:24:32,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 343.6666666666667) internal successors, (5155), 15 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:32,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 839.0) internal successors, (13424), 16 states have internal predecessors, (13424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:32,119 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 839.0) internal successors, (13424), 16 states have internal predecessors, (13424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:32,120 INFO L175 Difference]: Start difference. First operand has 68 places, 75 transitions, 313 flow. Second operand 15 states and 5155 transitions. [2022-12-13 22:24:32,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 246 transitions, 1299 flow [2022-12-13 22:24:32,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 246 transitions, 1267 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:24:32,123 INFO L231 Difference]: Finished difference. Result has 92 places, 102 transitions, 676 flow [2022-12-13 22:24:32,123 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=676, PETRI_PLACES=92, PETRI_TRANSITIONS=102} [2022-12-13 22:24:32,124 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 27 predicate places. [2022-12-13 22:24:32,124 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 102 transitions, 676 flow [2022-12-13 22:24:32,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 326.0) internal successors, (3912), 12 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) [2022-12-13 22:24:32,125 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:24:32,125 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 22:24:32,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-13 22:24:32,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:24:32,326 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:24:32,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:24:32,327 INFO L85 PathProgramCache]: Analyzing trace with hash -518704509, now seen corresponding path program 3 times [2022-12-13 22:24:32,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:24:32,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104374405] [2022-12-13 22:24:32,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:24:32,328 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 [2022-12-13 22:24:32,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:24:32,330 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:24:32,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:24:32,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 22:24:32,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:24:32,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 22:24:32,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:24:32,631 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 22:24:32,631 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-13 22:24:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:24:32,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:24:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:24:34,520 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:24:34,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104374405] [2022-12-13 22:24:34,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104374405] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:24:34,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 22:24:34,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-12-13 22:24:34,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53966716] [2022-12-13 22:24:34,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 22:24:34,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 22:24:34,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:24:34,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 22:24:34,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2022-12-13 22:24:51,851 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 839 [2022-12-13 22:24:51,855 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 102 transitions, 676 flow. Second operand has 22 states, 22 states have (on average 332.04545454545456) internal successors, (7305), 22 states have internal predecessors, (7305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:51,855 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:24:51,855 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 839 [2022-12-13 22:24:51,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:24:53,448 INFO L130 PetriNetUnfolder]: 5949/8304 cut-off events. [2022-12-13 22:24:53,448 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2022-12-13 22:24:53,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16792 conditions, 8304 events. 5949/8304 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 41501 event pairs, 5113 based on Foata normal form. 3/2959 useless extension candidates. Maximal degree in co-relation 16772. Up to 8289 conditions per place. [2022-12-13 22:24:53,471 INFO L137 encePairwiseOnDemand]: 833/839 looper letters, 48 selfloop transitions, 18 changer transitions 0/66 dead transitions. [2022-12-13 22:24:53,471 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 66 transitions, 451 flow [2022-12-13 22:24:53,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 22:24:53,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 22:24:53,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2717 transitions. [2022-12-13 22:24:53,475 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40479737783075087 [2022-12-13 22:24:53,475 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2717 transitions. [2022-12-13 22:24:53,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2717 transitions. [2022-12-13 22:24:53,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:24:53,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2717 transitions. [2022-12-13 22:24:53,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 339.625) internal successors, (2717), 8 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:53,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 839.0) internal successors, (7551), 9 states have internal predecessors, (7551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:53,485 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 839.0) internal successors, (7551), 9 states have internal predecessors, (7551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:53,485 INFO L175 Difference]: Start difference. First operand has 92 places, 102 transitions, 676 flow. Second operand 8 states and 2717 transitions. [2022-12-13 22:24:53,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 66 transitions, 451 flow [2022-12-13 22:24:53,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 66 transitions, 366 flow, removed 12 selfloop flow, removed 13 redundant places. [2022-12-13 22:24:53,487 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 270 flow [2022-12-13 22:24:53,487 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=270, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2022-12-13 22:24:53,487 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 11 predicate places. [2022-12-13 22:24:53,487 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 270 flow [2022-12-13 22:24:53,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 332.04545454545456) internal successors, (7305), 22 states have internal predecessors, (7305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:24:53,489 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:24:53,489 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2022-12-13 22:24:53,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-13 22:24:53,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:24:53,691 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:24:53,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:24:53,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1327007520, now seen corresponding path program 1 times [2022-12-13 22:24:53,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:24:53,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024797433] [2022-12-13 22:24:53,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:24:53,694 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 [2022-12-13 22:24:53,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:24:53,697 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:24:53,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:24:53,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:24:53,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 22:24:54,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:24:54,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:24:54,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:24:54,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:24:54,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:24:54,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:24:54,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:24:54,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:24:54,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:24:54,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:24:54,107 INFO L321 Elim1Store]: treesize reduction 82, result has 24.1 percent of original size [2022-12-13 22:24:54,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 66 [2022-12-13 22:24:54,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:24:54,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:24:54,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:24:54,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:24:54,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:24:54,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:24:54,565 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 22:24:54,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 60 [2022-12-13 22:24:54,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:24:54,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:24:54,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:24:54,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 44 [2022-12-13 22:24:55,649 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:24:55,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:24:55,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:24:55,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024797433] [2022-12-13 22:24:55,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024797433] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:24:55,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:24:55,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 22:24:55,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773229639] [2022-12-13 22:24:55,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:24:55,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:24:55,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:24:55,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:24:55,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:24:58,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:25:01,360 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 839 [2022-12-13 22:25:01,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 270 flow. Second operand has 5 states, 5 states have (on average 340.4) internal successors, (1702), 5 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:01,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:01,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 839 [2022-12-13 22:25:01,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:02,534 INFO L130 PetriNetUnfolder]: 4605/6511 cut-off events. [2022-12-13 22:25:02,535 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-12-13 22:25:02,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13170 conditions, 6511 events. 4605/6511 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 31713 event pairs, 3945 based on Foata normal form. 0/2492 useless extension candidates. Maximal degree in co-relation 13157. Up to 6511 conditions per place. [2022-12-13 22:25:02,551 INFO L137 encePairwiseOnDemand]: 836/839 looper letters, 63 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2022-12-13 22:25:02,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 64 transitions, 384 flow [2022-12-13 22:25:02,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:25:02,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:25:02,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1071 transitions. [2022-12-13 22:25:02,553 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42550655542312277 [2022-12-13 22:25:02,553 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1071 transitions. [2022-12-13 22:25:02,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1071 transitions. [2022-12-13 22:25:02,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:02,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1071 transitions. [2022-12-13 22:25:02,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 357.0) internal successors, (1071), 3 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:02,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 839.0) internal successors, (3356), 4 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:02,557 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 839.0) internal successors, (3356), 4 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:02,557 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 270 flow. Second operand 3 states and 1071 transitions. [2022-12-13 22:25:02,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 64 transitions, 384 flow [2022-12-13 22:25:02,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 64 transitions, 348 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-12-13 22:25:02,558 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 222 flow [2022-12-13 22:25:02,559 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2022-12-13 22:25:02,559 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2022-12-13 22:25:02,559 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 222 flow [2022-12-13 22:25:02,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 340.4) internal successors, (1702), 5 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:02,559 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:02,560 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2022-12-13 22:25:02,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-13 22:25:02,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:25:02,761 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:25:02,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:02,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1327007519, now seen corresponding path program 1 times [2022-12-13 22:25:02,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:25:02,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551247774] [2022-12-13 22:25:02,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:02,764 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 [2022-12-13 22:25:02,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:25:02,767 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:25:02,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:25:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:03,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 22:25:03,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:03,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:03,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:03,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:03,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:03,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:03,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:03,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-12-13 22:25:03,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:03,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:03,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:03,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:03,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:03,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:03,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:03,260 INFO L321 Elim1Store]: treesize reduction 17, result has 19.0 percent of original size [2022-12-13 22:25:03,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 31 [2022-12-13 22:25:03,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:03,900 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 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 22:25:04,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:04,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 22:25:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:25:04,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:25:04,712 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:25:04,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551247774] [2022-12-13 22:25:04,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551247774] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:04,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:04,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:25:04,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716756004] [2022-12-13 22:25:04,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:04,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:25:04,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:25:04,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:25:04,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:25:05,661 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 345 out of 839 [2022-12-13 22:25:05,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 346.75) internal successors, (1387), 4 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:05,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:05,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 345 of 839 [2022-12-13 22:25:05,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:07,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:25:09,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 22:25:12,483 INFO L130 PetriNetUnfolder]: 3261/4718 cut-off events. [2022-12-13 22:25:12,484 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-12-13 22:25:12,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9562 conditions, 4718 events. 3261/4718 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 22510 event pairs, 2777 based on Foata normal form. 0/2028 useless extension candidates. Maximal degree in co-relation 9549. Up to 4706 conditions per place. [2022-12-13 22:25:12,498 INFO L137 encePairwiseOnDemand]: 835/839 looper letters, 60 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2022-12-13 22:25:12,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 62 transitions, 332 flow [2022-12-13 22:25:12,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:25:12,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:25:12,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1432 transitions. [2022-12-13 22:25:12,502 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4266984505363528 [2022-12-13 22:25:12,502 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1432 transitions. [2022-12-13 22:25:12,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1432 transitions. [2022-12-13 22:25:12,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:12,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1432 transitions. [2022-12-13 22:25:12,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:12,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 839.0) internal successors, (4195), 5 states have internal predecessors, (4195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:12,506 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 839.0) internal successors, (4195), 5 states have internal predecessors, (4195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:12,506 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 222 flow. Second operand 4 states and 1432 transitions. [2022-12-13 22:25:12,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 62 transitions, 332 flow [2022-12-13 22:25:12,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 62 transitions, 331 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:25:12,508 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 211 flow [2022-12-13 22:25:12,508 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=211, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2022-12-13 22:25:12,508 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2022-12-13 22:25:12,508 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 211 flow [2022-12-13 22:25:12,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 346.75) internal successors, (1387), 4 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:12,509 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:12,509 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:12,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-13 22:25:12,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:25:12,710 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:25:12,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:12,711 INFO L85 PathProgramCache]: Analyzing trace with hash -351027883, now seen corresponding path program 1 times [2022-12-13 22:25:12,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:25:12,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1952262508] [2022-12-13 22:25:12,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:12,714 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 [2022-12-13 22:25:12,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:25:12,717 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:25:12,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:25:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:13,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 22:25:13,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:13,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:13,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:13,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:13,127 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 22:25:13,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-12-13 22:25:13,139 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 [2022-12-13 22:25:13,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:13,213 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 [2022-12-13 22:25:13,313 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 22:25:13,313 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 12 treesize of output 18 [2022-12-13 22:25:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:25:13,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:25:13,491 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:25:13,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1952262508] [2022-12-13 22:25:13,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1952262508] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:13,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:13,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 22:25:13,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069068829] [2022-12-13 22:25:13,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:13,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:25:13,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:25:13,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:25:13,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:25:14,053 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 345 out of 839 [2022-12-13 22:25:14,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 211 flow. Second operand has 5 states, 5 states have (on average 346.8) internal successors, (1734), 5 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:14,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:14,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 345 of 839 [2022-12-13 22:25:14,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:14,727 INFO L130 PetriNetUnfolder]: 3141/4534 cut-off events. [2022-12-13 22:25:14,727 INFO L131 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2022-12-13 22:25:14,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9196 conditions, 4534 events. 3141/4534 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 21428 event pairs, 2673 based on Foata normal form. 0/1988 useless extension candidates. Maximal degree in co-relation 9183. Up to 4534 conditions per place. [2022-12-13 22:25:14,740 INFO L137 encePairwiseOnDemand]: 836/839 looper letters, 59 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2022-12-13 22:25:14,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 60 transitions, 327 flow [2022-12-13 22:25:14,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:25:14,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:25:14,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1085 transitions. [2022-12-13 22:25:14,742 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4310687326181963 [2022-12-13 22:25:14,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1085 transitions. [2022-12-13 22:25:14,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1085 transitions. [2022-12-13 22:25:14,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:14,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1085 transitions. [2022-12-13 22:25:14,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 361.6666666666667) internal successors, (1085), 3 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:14,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 839.0) internal successors, (3356), 4 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:14,745 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 839.0) internal successors, (3356), 4 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:14,745 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 211 flow. Second operand 3 states and 1085 transitions. [2022-12-13 22:25:14,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 60 transitions, 327 flow [2022-12-13 22:25:14,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 60 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:25:14,746 INFO L231 Difference]: Finished difference. Result has 67 places, 60 transitions, 206 flow [2022-12-13 22:25:14,746 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=67, PETRI_TRANSITIONS=60} [2022-12-13 22:25:14,747 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2022-12-13 22:25:14,747 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 206 flow [2022-12-13 22:25:14,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 346.8) internal successors, (1734), 5 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:14,747 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:14,747 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:14,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 22:25:14,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:25:14,949 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:25:14,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:14,950 INFO L85 PathProgramCache]: Analyzing trace with hash -351027884, now seen corresponding path program 1 times [2022-12-13 22:25:14,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:25:14,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884805335] [2022-12-13 22:25:14,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:14,953 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:25:14,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:25:14,956 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:25:14,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:25:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:15,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 22:25:15,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:15,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:15,375 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-12-13 22:25:15,376 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 4 case distinctions, treesize of input 29 treesize of output 48 [2022-12-13 22:25:15,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:15,691 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-12-13 22:25:15,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-12-13 22:25:15,944 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-12-13 22:25:15,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-12-13 22:25:16,173 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:25:16,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:25:16,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:25:16,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884805335] [2022-12-13 22:25:16,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884805335] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:16,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:16,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:25:16,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240691489] [2022-12-13 22:25:16,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:16,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:25:16,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:25:16,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:25:16,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:25:16,708 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 839 [2022-12-13 22:25:16,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 349.25) internal successors, (1397), 4 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:16,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:16,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 839 [2022-12-13 22:25:16,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:17,348 INFO L130 PetriNetUnfolder]: 3021/4350 cut-off events. [2022-12-13 22:25:17,348 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-12-13 22:25:17,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8828 conditions, 4350 events. 3021/4350 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 20486 event pairs, 2569 based on Foata normal form. 0/1948 useless extension candidates. Maximal degree in co-relation 8815. Up to 4350 conditions per place. [2022-12-13 22:25:17,358 INFO L137 encePairwiseOnDemand]: 836/839 looper letters, 57 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2022-12-13 22:25:17,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 58 transitions, 318 flow [2022-12-13 22:25:17,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:25:17,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:25:17,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1089 transitions. [2022-12-13 22:25:17,360 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.432657926102503 [2022-12-13 22:25:17,360 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1089 transitions. [2022-12-13 22:25:17,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1089 transitions. [2022-12-13 22:25:17,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:17,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1089 transitions. [2022-12-13 22:25:17,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 363.0) internal successors, (1089), 3 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:17,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 839.0) internal successors, (3356), 4 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:17,363 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 839.0) internal successors, (3356), 4 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:17,364 INFO L175 Difference]: Start difference. First operand has 67 places, 60 transitions, 206 flow. Second operand 3 states and 1089 transitions. [2022-12-13 22:25:17,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 58 transitions, 318 flow [2022-12-13 22:25:17,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 58 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:25:17,365 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 203 flow [2022-12-13 22:25:17,365 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2022-12-13 22:25:17,365 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2022-12-13 22:25:17,365 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 203 flow [2022-12-13 22:25:17,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 349.25) internal successors, (1397), 4 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:17,365 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:17,365 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:17,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-13 22:25:17,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:25:17,566 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:25:17,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:17,567 INFO L85 PathProgramCache]: Analyzing trace with hash 2003040908, now seen corresponding path program 1 times [2022-12-13 22:25:17,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:25:17,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592149121] [2022-12-13 22:25:17,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:17,567 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 [2022-12-13 22:25:17,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:25:17,568 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:25:17,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:25:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:17,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 22:25:17,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:18,000 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 22:25:18,001 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 22:25:18,091 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 22:25:18,091 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-13 22:25:18,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:18,161 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 [2022-12-13 22:25:18,167 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 22:25:18,168 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 [2022-12-13 22:25:18,207 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 22:25:18,207 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 12 treesize of output 14 [2022-12-13 22:25:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:25:18,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:25:18,258 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:25:18,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592149121] [2022-12-13 22:25:18,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592149121] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:18,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:18,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 22:25:18,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498589770] [2022-12-13 22:25:18,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:18,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:25:18,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:25:18,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:25:18,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:25:18,616 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 839 [2022-12-13 22:25:18,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 203 flow. Second operand has 5 states, 5 states have (on average 334.0) internal successors, (1670), 5 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:18,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:18,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 839 [2022-12-13 22:25:18,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:19,676 INFO L130 PetriNetUnfolder]: 5349/7696 cut-off events. [2022-12-13 22:25:19,676 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-12-13 22:25:19,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15575 conditions, 7696 events. 5349/7696 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42441 event pairs, 2569 based on Foata normal form. 0/3410 useless extension candidates. Maximal degree in co-relation 15562. Up to 4344 conditions per place. [2022-12-13 22:25:19,705 INFO L137 encePairwiseOnDemand]: 834/839 looper letters, 90 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2022-12-13 22:25:19,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 94 transitions, 468 flow [2022-12-13 22:25:19,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 22:25:19,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 22:25:19,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1743 transitions. [2022-12-13 22:25:19,709 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4154946364719905 [2022-12-13 22:25:19,709 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1743 transitions. [2022-12-13 22:25:19,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1743 transitions. [2022-12-13 22:25:19,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:19,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1743 transitions. [2022-12-13 22:25:19,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 348.6) internal successors, (1743), 5 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:19,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 839.0) internal successors, (5034), 6 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:19,716 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 839.0) internal successors, (5034), 6 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:19,716 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 203 flow. Second operand 5 states and 1743 transitions. [2022-12-13 22:25:19,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 94 transitions, 468 flow [2022-12-13 22:25:19,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 94 transitions, 467 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:25:19,718 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 218 flow [2022-12-13 22:25:19,718 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2022-12-13 22:25:19,718 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 5 predicate places. [2022-12-13 22:25:19,718 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 218 flow [2022-12-13 22:25:19,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 334.0) internal successors, (1670), 5 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:19,719 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:19,719 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:19,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-13 22:25:19,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:25:19,920 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:25:19,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:19,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2003040907, now seen corresponding path program 1 times [2022-12-13 22:25:19,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:25:19,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722401789] [2022-12-13 22:25:19,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:19,923 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 [2022-12-13 22:25:19,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:25:19,926 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:25:19,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:25:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:20,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 22:25:20,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:20,371 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 22:25:20,371 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 22:25:20,395 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 22:25:20,395 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 [2022-12-13 22:25:20,416 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 22:25:20,417 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 [2022-12-13 22:25:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:25:20,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:25:20,435 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:25:20,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722401789] [2022-12-13 22:25:20,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722401789] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:20,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:20,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:25:20,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513647197] [2022-12-13 22:25:20,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:20,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:25:20,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:25:20,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:25:20,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:25:20,672 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 839 [2022-12-13 22:25:20,673 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 218 flow. Second operand has 4 states, 4 states have (on average 336.5) internal successors, (1346), 4 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:20,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:20,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 839 [2022-12-13 22:25:20,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:21,411 INFO L130 PetriNetUnfolder]: 4105/5928 cut-off events. [2022-12-13 22:25:21,412 INFO L131 PetriNetUnfolder]: For 826/826 co-relation queries the response was YES. [2022-12-13 22:25:21,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12674 conditions, 5928 events. 4105/5928 cut-off events. For 826/826 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 29235 event pairs, 3527 based on Foata normal form. 0/2924 useless extension candidates. Maximal degree in co-relation 12660. Up to 5922 conditions per place. [2022-12-13 22:25:21,431 INFO L137 encePairwiseOnDemand]: 835/839 looper letters, 55 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2022-12-13 22:25:21,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 57 transitions, 328 flow [2022-12-13 22:25:21,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:25:21,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:25:21,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1382 transitions. [2022-12-13 22:25:21,434 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41179976162097737 [2022-12-13 22:25:21,434 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1382 transitions. [2022-12-13 22:25:21,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1382 transitions. [2022-12-13 22:25:21,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:21,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1382 transitions. [2022-12-13 22:25:21,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 345.5) internal successors, (1382), 4 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:21,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 839.0) internal successors, (4195), 5 states have internal predecessors, (4195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:21,439 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 839.0) internal successors, (4195), 5 states have internal predecessors, (4195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:21,439 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 218 flow. Second operand 4 states and 1382 transitions. [2022-12-13 22:25:21,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 57 transitions, 328 flow [2022-12-13 22:25:21,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 57 transitions, 322 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 22:25:21,441 INFO L231 Difference]: Finished difference. Result has 68 places, 57 transitions, 212 flow [2022-12-13 22:25:21,441 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=68, PETRI_TRANSITIONS=57} [2022-12-13 22:25:21,441 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2022-12-13 22:25:21,441 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 57 transitions, 212 flow [2022-12-13 22:25:21,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 336.5) internal successors, (1346), 4 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:21,442 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:21,442 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:21,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:25:21,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:25:21,643 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:25:21,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:21,645 INFO L85 PathProgramCache]: Analyzing trace with hash 2003040981, now seen corresponding path program 1 times [2022-12-13 22:25:21,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:25:21,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398887689] [2022-12-13 22:25:21,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:21,647 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:25:21,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:25:21,650 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:25:21,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:25:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:22,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 22:25:22,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:22,027 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 [2022-12-13 22:25:22,054 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 22:25:22,054 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 [2022-12-13 22:25:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:25:22,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:25:22,070 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:25:22,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398887689] [2022-12-13 22:25:22,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398887689] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:22,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:22,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 22:25:22,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482791947] [2022-12-13 22:25:22,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:22,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:25:22,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:25:22,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:25:22,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:25:22,357 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 839 [2022-12-13 22:25:22,358 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 57 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 336.5) internal successors, (1346), 4 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:22,358 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:22,358 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 839 [2022-12-13 22:25:22,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:22,991 INFO L130 PetriNetUnfolder]: 3065/4444 cut-off events. [2022-12-13 22:25:22,992 INFO L131 PetriNetUnfolder]: For 495/495 co-relation queries the response was YES. [2022-12-13 22:25:22,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9484 conditions, 4444 events. 3065/4444 cut-off events. For 495/495 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 20851 event pairs, 2591 based on Foata normal form. 0/2384 useless extension candidates. Maximal degree in co-relation 9470. Up to 4432 conditions per place. [2022-12-13 22:25:23,004 INFO L137 encePairwiseOnDemand]: 835/839 looper letters, 53 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2022-12-13 22:25:23,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 55 transitions, 318 flow [2022-12-13 22:25:23,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:25:23,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:25:23,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1380 transitions. [2022-12-13 22:25:23,007 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41120381406436235 [2022-12-13 22:25:23,007 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1380 transitions. [2022-12-13 22:25:23,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1380 transitions. [2022-12-13 22:25:23,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:23,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1380 transitions. [2022-12-13 22:25:23,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 345.0) internal successors, (1380), 4 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:23,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 839.0) internal successors, (4195), 5 states have internal predecessors, (4195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:23,010 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 839.0) internal successors, (4195), 5 states have internal predecessors, (4195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:23,011 INFO L175 Difference]: Start difference. First operand has 68 places, 57 transitions, 212 flow. Second operand 4 states and 1380 transitions. [2022-12-13 22:25:23,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 55 transitions, 318 flow [2022-12-13 22:25:23,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 55 transitions, 315 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:25:23,012 INFO L231 Difference]: Finished difference. Result has 67 places, 55 transitions, 209 flow [2022-12-13 22:25:23,012 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=209, PETRI_PLACES=67, PETRI_TRANSITIONS=55} [2022-12-13 22:25:23,012 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 2 predicate places. [2022-12-13 22:25:23,012 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 55 transitions, 209 flow [2022-12-13 22:25:23,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 336.5) internal successors, (1346), 4 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:23,012 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:23,013 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:23,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-13 22:25:23,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:25:23,214 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:25:23,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:23,215 INFO L85 PathProgramCache]: Analyzing trace with hash 2003040980, now seen corresponding path program 1 times [2022-12-13 22:25:23,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:25:23,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454065504] [2022-12-13 22:25:23,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:23,217 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 [2022-12-13 22:25:23,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:25:23,220 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:25:23,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:25:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:23,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 22:25:23,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:23,562 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 5 [2022-12-13 22:25:23,567 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 [2022-12-13 22:25:23,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:23,609 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 [2022-12-13 22:25:23,615 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 22:25:23,616 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 [2022-12-13 22:25:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:25:23,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:25:23,659 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:25:23,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454065504] [2022-12-13 22:25:23,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454065504] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:23,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:23,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 22:25:23,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143604927] [2022-12-13 22:25:23,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:23,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:25:23,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:25:23,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:25:23,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:25:24,116 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 839 [2022-12-13 22:25:24,117 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 55 transitions, 209 flow. Second operand has 5 states, 5 states have (on average 334.0) internal successors, (1670), 5 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:24,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:24,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 839 [2022-12-13 22:25:24,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:24,901 INFO L130 PetriNetUnfolder]: 2797/4062 cut-off events. [2022-12-13 22:25:24,901 INFO L131 PetriNetUnfolder]: For 337/337 co-relation queries the response was YES. [2022-12-13 22:25:24,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8713 conditions, 4062 events. 2797/4062 cut-off events. For 337/337 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19778 event pairs, 1477 based on Foata normal form. 0/2250 useless extension candidates. Maximal degree in co-relation 8699. Up to 2602 conditions per place. [2022-12-13 22:25:24,914 INFO L137 encePairwiseOnDemand]: 834/839 looper letters, 81 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2022-12-13 22:25:24,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 85 transitions, 444 flow [2022-12-13 22:25:24,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 22:25:24,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 22:25:24,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1734 transitions. [2022-12-13 22:25:24,917 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4133492252681764 [2022-12-13 22:25:24,917 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1734 transitions. [2022-12-13 22:25:24,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1734 transitions. [2022-12-13 22:25:24,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:24,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1734 transitions. [2022-12-13 22:25:24,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 346.8) internal successors, (1734), 5 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:24,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 839.0) internal successors, (5034), 6 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:24,922 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 839.0) internal successors, (5034), 6 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:24,922 INFO L175 Difference]: Start difference. First operand has 67 places, 55 transitions, 209 flow. Second operand 5 states and 1734 transitions. [2022-12-13 22:25:24,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 85 transitions, 444 flow [2022-12-13 22:25:24,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 85 transitions, 441 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:25:24,924 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 218 flow [2022-12-13 22:25:24,924 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2022-12-13 22:25:24,924 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 5 predicate places. [2022-12-13 22:25:24,924 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 218 flow [2022-12-13 22:25:24,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 334.0) internal successors, (1670), 5 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:24,925 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:24,925 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:24,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:25:25,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:25:25,126 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:25:25,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:25,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1964653048, now seen corresponding path program 1 times [2022-12-13 22:25:25,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:25:25,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705855696] [2022-12-13 22:25:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:25,129 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 [2022-12-13 22:25:25,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:25:25,132 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:25:25,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:25:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:25,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 22:25:25,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:25,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:25,598 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-13 22:25:25,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-12-13 22:25:25,614 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 167 treesize of output 163 [2022-12-13 22:25:25,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:25,693 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 [2022-12-13 22:25:25,777 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 22:25:25,777 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 12 treesize of output 18 [2022-12-13 22:25:25,959 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:25:25,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:25:25,959 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:25:25,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705855696] [2022-12-13 22:25:25,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705855696] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:25,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:25,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 22:25:25,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081117806] [2022-12-13 22:25:25,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:25,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:25:25,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:25:25,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:25:25,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:25:26,690 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 839 [2022-12-13 22:25:26,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 345.2) internal successors, (1726), 5 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:26,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:26,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 839 [2022-12-13 22:25:26,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:27,349 INFO L130 PetriNetUnfolder]: 2659/3849 cut-off events. [2022-12-13 22:25:27,349 INFO L131 PetriNetUnfolder]: For 1331/1331 co-relation queries the response was YES. [2022-12-13 22:25:27,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8689 conditions, 3849 events. 2659/3849 cut-off events. For 1331/1331 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 17497 event pairs, 2233 based on Foata normal form. 0/2284 useless extension candidates. Maximal degree in co-relation 8674. Up to 3849 conditions per place. [2022-12-13 22:25:27,362 INFO L137 encePairwiseOnDemand]: 836/839 looper letters, 52 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2022-12-13 22:25:27,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 53 transitions, 320 flow [2022-12-13 22:25:27,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:25:27,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:25:27,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1071 transitions. [2022-12-13 22:25:27,365 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42550655542312277 [2022-12-13 22:25:27,365 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1071 transitions. [2022-12-13 22:25:27,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1071 transitions. [2022-12-13 22:25:27,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:27,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1071 transitions. [2022-12-13 22:25:27,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 357.0) internal successors, (1071), 3 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:27,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 839.0) internal successors, (3356), 4 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:27,368 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 839.0) internal successors, (3356), 4 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:27,368 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 218 flow. Second operand 3 states and 1071 transitions. [2022-12-13 22:25:27,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 53 transitions, 320 flow [2022-12-13 22:25:27,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 53 transitions, 312 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 22:25:27,370 INFO L231 Difference]: Finished difference. Result has 66 places, 53 transitions, 208 flow [2022-12-13 22:25:27,370 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=66, PETRI_TRANSITIONS=53} [2022-12-13 22:25:27,370 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2022-12-13 22:25:27,370 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 53 transitions, 208 flow [2022-12-13 22:25:27,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 345.2) internal successors, (1726), 5 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:27,371 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:27,371 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:27,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-13 22:25:27,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:25:27,572 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:25:27,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:27,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1964653050, now seen corresponding path program 1 times [2022-12-13 22:25:27,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:25:27,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768726720] [2022-12-13 22:25:27,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:27,575 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:25:27,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:25:27,578 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:25:27,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:25:27,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:27,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 22:25:27,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:28,036 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-13 22:25:28,037 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-12-13 22:25:28,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:28,085 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 20 [2022-12-13 22:25:28,145 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 22:25:28,145 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 [2022-12-13 22:25:28,225 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:25:28,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:25:28,225 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:25:28,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768726720] [2022-12-13 22:25:28,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768726720] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:28,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:28,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:25:28,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131560111] [2022-12-13 22:25:28,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:28,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:25:28,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:25:28,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:25:28,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:25:28,523 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 839 [2022-12-13 22:25:28,523 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 53 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 345.75) internal successors, (1383), 4 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:28,523 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:28,523 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 839 [2022-12-13 22:25:28,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:29,109 INFO L130 PetriNetUnfolder]: 2521/3636 cut-off events. [2022-12-13 22:25:29,109 INFO L131 PetriNetUnfolder]: For 739/739 co-relation queries the response was YES. [2022-12-13 22:25:29,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8006 conditions, 3636 events. 2521/3636 cut-off events. For 739/739 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 16420 event pairs, 2113 based on Foata normal form. 0/2204 useless extension candidates. Maximal degree in co-relation 7991. Up to 3636 conditions per place. [2022-12-13 22:25:29,121 INFO L137 encePairwiseOnDemand]: 836/839 looper letters, 50 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2022-12-13 22:25:29,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 51 transitions, 306 flow [2022-12-13 22:25:29,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:25:29,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:25:29,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1069 transitions. [2022-12-13 22:25:29,124 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4247119586809694 [2022-12-13 22:25:29,124 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1069 transitions. [2022-12-13 22:25:29,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1069 transitions. [2022-12-13 22:25:29,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:29,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1069 transitions. [2022-12-13 22:25:29,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 356.3333333333333) internal successors, (1069), 3 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:29,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 839.0) internal successors, (3356), 4 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:29,127 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 839.0) internal successors, (3356), 4 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:29,127 INFO L175 Difference]: Start difference. First operand has 66 places, 53 transitions, 208 flow. Second operand 3 states and 1069 transitions. [2022-12-13 22:25:29,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 51 transitions, 306 flow [2022-12-13 22:25:29,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 51 transitions, 305 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:25:29,129 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 205 flow [2022-12-13 22:25:29,129 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=205, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2022-12-13 22:25:29,129 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 0 predicate places. [2022-12-13 22:25:29,129 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 205 flow [2022-12-13 22:25:29,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 345.75) internal successors, (1383), 4 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:29,129 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:29,129 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:29,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-13 22:25:29,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:25:29,331 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:25:29,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:29,332 INFO L85 PathProgramCache]: Analyzing trace with hash 774706415, now seen corresponding path program 1 times [2022-12-13 22:25:29,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:25:29,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325383758] [2022-12-13 22:25:29,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:29,334 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 [2022-12-13 22:25:29,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:25:29,337 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:25:29,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:25:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:29,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 22:25:29,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:29,619 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 5 [2022-12-13 22:25:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:25:29,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:25:29,667 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:25:29,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325383758] [2022-12-13 22:25:29,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325383758] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:29,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:29,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 22:25:29,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703470885] [2022-12-13 22:25:29,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:29,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:25:29,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:25:29,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:25:29,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:25:30,086 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 839 [2022-12-13 22:25:30,087 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 340.4) internal successors, (1702), 5 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:30,087 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:30,087 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 839 [2022-12-13 22:25:30,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:31,097 INFO L130 PetriNetUnfolder]: 4315/6208 cut-off events. [2022-12-13 22:25:31,097 INFO L131 PetriNetUnfolder]: For 1309/1309 co-relation queries the response was YES. [2022-12-13 22:25:31,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13616 conditions, 6208 events. 4315/6208 cut-off events. For 1309/1309 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 31898 event pairs, 2113 based on Foata normal form. 0/3730 useless extension candidates. Maximal degree in co-relation 13601. Up to 3618 conditions per place. [2022-12-13 22:25:31,120 INFO L137 encePairwiseOnDemand]: 834/839 looper letters, 74 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2022-12-13 22:25:31,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 78 transitions, 431 flow [2022-12-13 22:25:31,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 22:25:31,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 22:25:31,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1755 transitions. [2022-12-13 22:25:31,124 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41835518474374256 [2022-12-13 22:25:31,124 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1755 transitions. [2022-12-13 22:25:31,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1755 transitions. [2022-12-13 22:25:31,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:31,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1755 transitions. [2022-12-13 22:25:31,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 351.0) internal successors, (1755), 5 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:31,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 839.0) internal successors, (5034), 6 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:31,129 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 839.0) internal successors, (5034), 6 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:31,129 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 205 flow. Second operand 5 states and 1755 transitions. [2022-12-13 22:25:31,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 78 transitions, 431 flow [2022-12-13 22:25:31,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 78 transitions, 430 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:25:31,130 INFO L231 Difference]: Finished difference. Result has 69 places, 52 transitions, 220 flow [2022-12-13 22:25:31,131 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=69, PETRI_TRANSITIONS=52} [2022-12-13 22:25:31,131 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 4 predicate places. [2022-12-13 22:25:31,131 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 52 transitions, 220 flow [2022-12-13 22:25:31,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 340.4) internal successors, (1702), 5 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:31,131 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:31,131 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:31,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-13 22:25:31,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:25:31,333 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:25:31,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:31,334 INFO L85 PathProgramCache]: Analyzing trace with hash 774706349, now seen corresponding path program 1 times [2022-12-13 22:25:31,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:25:31,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250480124] [2022-12-13 22:25:31,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:31,336 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 [2022-12-13 22:25:31,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:25:31,339 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:25:31,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:25:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:31,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 22:25:31,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:31,722 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 [2022-12-13 22:25:31,728 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 5 [2022-12-13 22:25:31,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:31,767 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 [2022-12-13 22:25:31,774 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 22:25:31,774 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 [2022-12-13 22:25:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:25:31,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:25:31,817 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:25:31,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250480124] [2022-12-13 22:25:31,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250480124] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:31,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:31,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 22:25:31,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376538020] [2022-12-13 22:25:31,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:31,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:25:31,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:25:31,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:25:31,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:25:32,235 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 839 [2022-12-13 22:25:32,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 52 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 334.4) internal successors, (1672), 5 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:32,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:32,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 839 [2022-12-13 22:25:32,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:33,156 INFO L130 PetriNetUnfolder]: 3961/5704 cut-off events. [2022-12-13 22:25:33,157 INFO L131 PetriNetUnfolder]: For 1891/1891 co-relation queries the response was YES. [2022-12-13 22:25:33,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13268 conditions, 5704 events. 3961/5704 cut-off events. For 1891/1891 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 28730 event pairs, 2113 based on Foata normal form. 0/3642 useless extension candidates. Maximal degree in co-relation 13252. Up to 3624 conditions per place. [2022-12-13 22:25:33,177 INFO L137 encePairwiseOnDemand]: 834/839 looper letters, 73 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2022-12-13 22:25:33,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 77 transitions, 440 flow [2022-12-13 22:25:33,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 22:25:33,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 22:25:33,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1724 transitions. [2022-12-13 22:25:33,181 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41096543504171634 [2022-12-13 22:25:33,181 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1724 transitions. [2022-12-13 22:25:33,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1724 transitions. [2022-12-13 22:25:33,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:33,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1724 transitions. [2022-12-13 22:25:33,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 344.8) internal successors, (1724), 5 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:33,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 839.0) internal successors, (5034), 6 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:33,186 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 839.0) internal successors, (5034), 6 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:33,186 INFO L175 Difference]: Start difference. First operand has 69 places, 52 transitions, 220 flow. Second operand 5 states and 1724 transitions. [2022-12-13 22:25:33,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 77 transitions, 440 flow [2022-12-13 22:25:33,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 77 transitions, 434 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 22:25:33,188 INFO L231 Difference]: Finished difference. Result has 71 places, 52 transitions, 226 flow [2022-12-13 22:25:33,188 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=71, PETRI_TRANSITIONS=52} [2022-12-13 22:25:33,188 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 6 predicate places. [2022-12-13 22:25:33,188 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 52 transitions, 226 flow [2022-12-13 22:25:33,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 334.4) internal successors, (1672), 5 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:33,188 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:33,188 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:33,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:25:33,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:25:33,389 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:25:33,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:33,390 INFO L85 PathProgramCache]: Analyzing trace with hash 774706416, now seen corresponding path program 1 times [2022-12-13 22:25:33,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:25:33,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218313483] [2022-12-13 22:25:33,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:33,392 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 [2022-12-13 22:25:33,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:25:33,395 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:25:33,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:25:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:33,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 22:25:33,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:33,822 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 [2022-12-13 22:25:33,846 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:25:33,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:25:33,846 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:25:33,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218313483] [2022-12-13 22:25:33,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218313483] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:25:33,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:25:33,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 22:25:33,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7795831] [2022-12-13 22:25:33,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:25:33,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:25:33,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:25:33,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:25:33,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:25:34,106 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 334 out of 839 [2022-12-13 22:25:34,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 52 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:34,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:34,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 334 of 839 [2022-12-13 22:25:34,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:34,713 INFO L130 PetriNetUnfolder]: 2768/4005 cut-off events. [2022-12-13 22:25:34,713 INFO L131 PetriNetUnfolder]: For 2154/2154 co-relation queries the response was YES. [2022-12-13 22:25:34,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9851 conditions, 4005 events. 2768/4005 cut-off events. For 2154/2154 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 18146 event pairs, 2324 based on Foata normal form. 0/2911 useless extension candidates. Maximal degree in co-relation 9834. Up to 3987 conditions per place. [2022-12-13 22:25:34,724 INFO L137 encePairwiseOnDemand]: 835/839 looper letters, 48 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2022-12-13 22:25:34,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 50 transitions, 322 flow [2022-12-13 22:25:34,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:25:34,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:25:34,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1374 transitions. [2022-12-13 22:25:34,727 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4094159713945173 [2022-12-13 22:25:34,727 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1374 transitions. [2022-12-13 22:25:34,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1374 transitions. [2022-12-13 22:25:34,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:34,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1374 transitions. [2022-12-13 22:25:34,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 343.5) internal successors, (1374), 4 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:34,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 839.0) internal successors, (4195), 5 states have internal predecessors, (4195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:34,732 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 839.0) internal successors, (4195), 5 states have internal predecessors, (4195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:34,732 INFO L175 Difference]: Start difference. First operand has 71 places, 52 transitions, 226 flow. Second operand 4 states and 1374 transitions. [2022-12-13 22:25:34,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 50 transitions, 322 flow [2022-12-13 22:25:34,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 50 transitions, 314 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 22:25:34,734 INFO L231 Difference]: Finished difference. Result has 68 places, 50 transitions, 218 flow [2022-12-13 22:25:34,734 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=218, PETRI_PLACES=68, PETRI_TRANSITIONS=50} [2022-12-13 22:25:34,734 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2022-12-13 22:25:34,734 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 50 transitions, 218 flow [2022-12-13 22:25:34,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:34,734 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:34,734 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:34,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-13 22:25:34,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:25:34,936 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:25:34,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:34,937 INFO L85 PathProgramCache]: Analyzing trace with hash 777080440, now seen corresponding path program 1 times [2022-12-13 22:25:34,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:25:34,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443210189] [2022-12-13 22:25:34,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:34,938 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:25:34,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:25:34,941 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:25:34,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:25:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:35,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 22:25:35,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:35,519 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 5 [2022-12-13 22:25:35,548 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 22:25:35,549 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 12 treesize of output 14 [2022-12-13 22:25:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:25:35,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:25:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:25:36,007 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:25:36,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443210189] [2022-12-13 22:25:36,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [443210189] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:25:36,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 22:25:36,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-13 22:25:36,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623994440] [2022-12-13 22:25:36,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 22:25:36,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 22:25:36,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:25:36,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 22:25:36,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 22:25:39,422 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 839 [2022-12-13 22:25:39,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 50 transitions, 218 flow. Second operand has 10 states, 10 states have (on average 339.2) internal successors, (3392), 10 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:39,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:25:39,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 839 [2022-12-13 22:25:39,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:25:41,378 INFO L130 PetriNetUnfolder]: 6524/9423 cut-off events. [2022-12-13 22:25:41,378 INFO L131 PetriNetUnfolder]: For 2622/2622 co-relation queries the response was YES. [2022-12-13 22:25:41,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22255 conditions, 9423 events. 6524/9423 cut-off events. For 2622/2622 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 49293 event pairs, 1457 based on Foata normal form. 330/7135 useless extension candidates. Maximal degree in co-relation 22238. Up to 2560 conditions per place. [2022-12-13 22:25:41,407 INFO L137 encePairwiseOnDemand]: 834/839 looper letters, 149 selfloop transitions, 7 changer transitions 0/156 dead transitions. [2022-12-13 22:25:41,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 156 transitions, 822 flow [2022-12-13 22:25:41,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 22:25:41,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 22:25:41,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2838 transitions. [2022-12-13 22:25:41,412 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42282479141835516 [2022-12-13 22:25:41,412 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2838 transitions. [2022-12-13 22:25:41,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2838 transitions. [2022-12-13 22:25:41,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:25:41,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2838 transitions. [2022-12-13 22:25:41,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 354.75) internal successors, (2838), 8 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:41,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 839.0) internal successors, (7551), 9 states have internal predecessors, (7551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:41,419 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 839.0) internal successors, (7551), 9 states have internal predecessors, (7551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:41,419 INFO L175 Difference]: Start difference. First operand has 68 places, 50 transitions, 218 flow. Second operand 8 states and 2838 transitions. [2022-12-13 22:25:41,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 156 transitions, 822 flow [2022-12-13 22:25:41,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 156 transitions, 819 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:25:41,421 INFO L231 Difference]: Finished difference. Result has 76 places, 53 transitions, 255 flow [2022-12-13 22:25:41,421 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=255, PETRI_PLACES=76, PETRI_TRANSITIONS=53} [2022-12-13 22:25:41,422 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 11 predicate places. [2022-12-13 22:25:41,422 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 53 transitions, 255 flow [2022-12-13 22:25:41,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 339.2) internal successors, (3392), 10 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:25:41,422 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:25:41,422 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:25:41,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-13 22:25:41,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:25:41,623 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:25:41,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:25:41,624 INFO L85 PathProgramCache]: Analyzing trace with hash 777080368, now seen corresponding path program 1 times [2022-12-13 22:25:41,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:25:41,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107403959] [2022-12-13 22:25:41,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:25:41,626 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 [2022-12-13 22:25:41,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:25:41,629 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:25:41,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:25:42,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:25:42,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 22:25:42,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:25:42,135 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 22:25:42,135 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-13 22:25:42,233 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 22:25:42,233 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 22:25:42,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:25:42,304 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 [2022-12-13 22:25:42,315 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 22:25:42,315 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 [2022-12-13 22:25:42,355 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 22:25:42,356 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 12 treesize of output 14 [2022-12-13 22:25:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:25:42,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:25:45,007 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:25:45,007 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:25:45,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107403959] [2022-12-13 22:25:45,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107403959] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:25:45,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 22:25:45,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2022-12-13 22:25:45,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774335752] [2022-12-13 22:25:45,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 22:25:45,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 22:25:45,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:25:45,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 22:25:45,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-12-13 22:25:47,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:25:50,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:25:54,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:25:58,378 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] [2022-12-13 22:26:01,228 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 839 [2022-12-13 22:26:01,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 53 transitions, 255 flow. Second operand has 11 states, 11 states have (on average 330.1818181818182) internal successors, (3632), 11 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:01,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:26:01,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 839 [2022-12-13 22:26:01,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:26:03,483 INFO L130 PetriNetUnfolder]: 5735/8304 cut-off events. [2022-12-13 22:26:03,483 INFO L131 PetriNetUnfolder]: For 4892/4892 co-relation queries the response was YES. [2022-12-13 22:26:03,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20765 conditions, 8304 events. 5735/8304 cut-off events. For 4892/4892 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 43094 event pairs, 991 based on Foata normal form. 330/6250 useless extension candidates. Maximal degree in co-relation 20745. Up to 2179 conditions per place. [2022-12-13 22:26:03,515 INFO L137 encePairwiseOnDemand]: 832/839 looper letters, 143 selfloop transitions, 10 changer transitions 0/153 dead transitions. [2022-12-13 22:26:03,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 153 transitions, 829 flow [2022-12-13 22:26:03,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 22:26:03,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 22:26:03,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2762 transitions. [2022-12-13 22:26:03,519 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41150178784266983 [2022-12-13 22:26:03,519 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2762 transitions. [2022-12-13 22:26:03,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2762 transitions. [2022-12-13 22:26:03,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:26:03,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2762 transitions. [2022-12-13 22:26:03,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 345.25) internal successors, (2762), 8 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:03,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 839.0) internal successors, (7551), 9 states have internal predecessors, (7551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:03,526 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 839.0) internal successors, (7551), 9 states have internal predecessors, (7551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:03,526 INFO L175 Difference]: Start difference. First operand has 76 places, 53 transitions, 255 flow. Second operand 8 states and 2762 transitions. [2022-12-13 22:26:03,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 153 transitions, 829 flow [2022-12-13 22:26:03,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 153 transitions, 818 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-12-13 22:26:03,536 INFO L231 Difference]: Finished difference. Result has 84 places, 54 transitions, 289 flow [2022-12-13 22:26:03,536 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=289, PETRI_PLACES=84, PETRI_TRANSITIONS=54} [2022-12-13 22:26:03,537 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 19 predicate places. [2022-12-13 22:26:03,537 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 54 transitions, 289 flow [2022-12-13 22:26:03,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 330.1818181818182) internal successors, (3632), 11 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:03,537 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:26:03,537 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:26:03,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-13 22:26:03,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:26:03,738 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:26:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:26:03,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1460707568, now seen corresponding path program 1 times [2022-12-13 22:26:03,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:26:03,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013889674] [2022-12-13 22:26:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:03,741 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 [2022-12-13 22:26:03,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:26:03,744 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:26:03,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:26:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:04,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 22:26:04,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:26:04,072 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 5 [2022-12-13 22:26:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:26:04,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:26:04,128 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:26:04,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013889674] [2022-12-13 22:26:04,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013889674] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:26:04,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:26:04,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 22:26:04,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826051040] [2022-12-13 22:26:04,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:26:04,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:26:04,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:26:04,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:26:04,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:26:04,538 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 839 [2022-12-13 22:26:04,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 54 transitions, 289 flow. Second operand has 5 states, 5 states have (on average 340.8) internal successors, (1704), 5 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:04,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:26:04,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 839 [2022-12-13 22:26:04,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:26:06,476 INFO L130 PetriNetUnfolder]: 8765/12656 cut-off events. [2022-12-13 22:26:06,476 INFO L131 PetriNetUnfolder]: For 13374/13374 co-relation queries the response was YES. [2022-12-13 22:26:06,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34388 conditions, 12656 events. 8765/12656 cut-off events. For 13374/13374 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 69791 event pairs, 4925 based on Foata normal form. 0/9678 useless extension candidates. Maximal degree in co-relation 34364. Up to 8286 conditions per place. [2022-12-13 22:26:06,526 INFO L137 encePairwiseOnDemand]: 834/839 looper letters, 78 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2022-12-13 22:26:06,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 82 transitions, 596 flow [2022-12-13 22:26:06,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 22:26:06,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 22:26:06,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1749 transitions. [2022-12-13 22:26:06,528 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4169249106078665 [2022-12-13 22:26:06,529 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1749 transitions. [2022-12-13 22:26:06,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1749 transitions. [2022-12-13 22:26:06,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:26:06,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1749 transitions. [2022-12-13 22:26:06,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 349.8) internal successors, (1749), 5 states have internal predecessors, (1749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:06,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 839.0) internal successors, (5034), 6 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:06,535 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 839.0) internal successors, (5034), 6 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:06,535 INFO L175 Difference]: Start difference. First operand has 84 places, 54 transitions, 289 flow. Second operand 5 states and 1749 transitions. [2022-12-13 22:26:06,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 82 transitions, 596 flow [2022-12-13 22:26:06,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 82 transitions, 545 flow, removed 10 selfloop flow, removed 9 redundant places. [2022-12-13 22:26:06,568 INFO L231 Difference]: Finished difference. Result has 80 places, 55 transitions, 278 flow [2022-12-13 22:26:06,568 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=80, PETRI_TRANSITIONS=55} [2022-12-13 22:26:06,569 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 15 predicate places. [2022-12-13 22:26:06,569 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 55 transitions, 278 flow [2022-12-13 22:26:06,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 340.8) internal successors, (1704), 5 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:06,569 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:26:06,569 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:26:06,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-12-13 22:26:06,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:26:06,770 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:26:06,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:26:06,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1460707410, now seen corresponding path program 1 times [2022-12-13 22:26:06,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:26:06,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980382984] [2022-12-13 22:26:06,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:06,773 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 [2022-12-13 22:26:06,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:26:06,776 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:26:06,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:26:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:07,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 22:26:07,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:26:07,317 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 22:26:07,317 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 22:26:07,395 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 22:26:07,395 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-13 22:26:07,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:26:07,461 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 [2022-12-13 22:26:07,469 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 22:26:07,469 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 [2022-12-13 22:26:07,498 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 22:26:07,499 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 12 treesize of output 14 [2022-12-13 22:26:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:26:07,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:26:07,551 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:26:07,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980382984] [2022-12-13 22:26:07,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980382984] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:26:07,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:26:07,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 22:26:07,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417114989] [2022-12-13 22:26:07,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:26:07,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:26:07,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:26:07,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:26:07,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:26:07,900 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 839 [2022-12-13 22:26:07,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 55 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 334.8) internal successors, (1674), 5 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:07,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:26:07,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 839 [2022-12-13 22:26:07,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:26:09,539 INFO L130 PetriNetUnfolder]: 7755/11212 cut-off events. [2022-12-13 22:26:09,539 INFO L131 PetriNetUnfolder]: For 8104/8104 co-relation queries the response was YES. [2022-12-13 22:26:09,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30938 conditions, 11212 events. 7755/11212 cut-off events. For 8104/8104 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 60369 event pairs, 4925 based on Foata normal form. 0/9482 useless extension candidates. Maximal degree in co-relation 30917. Up to 8298 conditions per place. [2022-12-13 22:26:09,575 INFO L137 encePairwiseOnDemand]: 834/839 looper letters, 77 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2022-12-13 22:26:09,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 555 flow [2022-12-13 22:26:09,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 22:26:09,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 22:26:09,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1718 transitions. [2022-12-13 22:26:09,578 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4095351609058403 [2022-12-13 22:26:09,578 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1718 transitions. [2022-12-13 22:26:09,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1718 transitions. [2022-12-13 22:26:09,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:26:09,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1718 transitions. [2022-12-13 22:26:09,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 343.6) internal successors, (1718), 5 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:09,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 839.0) internal successors, (5034), 6 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:09,582 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 839.0) internal successors, (5034), 6 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:09,582 INFO L175 Difference]: Start difference. First operand has 80 places, 55 transitions, 278 flow. Second operand 5 states and 1718 transitions. [2022-12-13 22:26:09,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 555 flow [2022-12-13 22:26:09,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 81 transitions, 549 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 22:26:09,589 INFO L231 Difference]: Finished difference. Result has 82 places, 55 transitions, 284 flow [2022-12-13 22:26:09,590 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=284, PETRI_PLACES=82, PETRI_TRANSITIONS=55} [2022-12-13 22:26:09,590 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 17 predicate places. [2022-12-13 22:26:09,590 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 55 transitions, 284 flow [2022-12-13 22:26:09,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 334.8) internal successors, (1674), 5 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:09,590 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:26:09,590 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:26:09,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:26:09,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:26:09,791 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:26:09,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:26:09,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1463572461, now seen corresponding path program 1 times [2022-12-13 22:26:09,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:26:09,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [884403608] [2022-12-13 22:26:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:09,795 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:26:09,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:26:09,798 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:26:09,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:26:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:10,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 22:26:10,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:26:10,376 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 [2022-12-13 22:26:10,381 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 5 [2022-12-13 22:26:10,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:26:10,424 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 [2022-12-13 22:26:10,431 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 22:26:10,432 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 [2022-12-13 22:26:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:26:10,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:26:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:26:10,924 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:26:10,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [884403608] [2022-12-13 22:26:10,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [884403608] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:26:10,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 22:26:10,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-13 22:26:10,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34976343] [2022-12-13 22:26:10,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 22:26:10,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 22:26:10,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:26:10,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 22:26:10,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 22:26:14,810 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] [2022-12-13 22:26:16,693 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 839 [2022-12-13 22:26:16,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 55 transitions, 284 flow. Second operand has 10 states, 10 states have (on average 332.6) internal successors, (3326), 10 states have internal predecessors, (3326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:16,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:26:16,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 839 [2022-12-13 22:26:16,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:26:20,857 INFO L130 PetriNetUnfolder]: 16743/24050 cut-off events. [2022-12-13 22:26:20,857 INFO L131 PetriNetUnfolder]: For 25011/25011 co-relation queries the response was YES. [2022-12-13 22:26:20,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68127 conditions, 24050 events. 16743/24050 cut-off events. For 25011/25011 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 140328 event pairs, 2857 based on Foata normal form. 1074/22104 useless extension candidates. Maximal degree in co-relation 68105. Up to 5676 conditions per place. [2022-12-13 22:26:20,978 INFO L137 encePairwiseOnDemand]: 832/839 looper letters, 163 selfloop transitions, 9 changer transitions 0/172 dead transitions. [2022-12-13 22:26:20,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 172 transitions, 1144 flow [2022-12-13 22:26:20,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 22:26:20,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 22:26:20,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2773 transitions. [2022-12-13 22:26:20,983 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41314064362336117 [2022-12-13 22:26:20,983 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2773 transitions. [2022-12-13 22:26:20,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2773 transitions. [2022-12-13 22:26:20,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:26:20,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2773 transitions. [2022-12-13 22:26:20,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 346.625) internal successors, (2773), 8 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:20,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 839.0) internal successors, (7551), 9 states have internal predecessors, (7551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:20,995 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 839.0) internal successors, (7551), 9 states have internal predecessors, (7551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:20,995 INFO L175 Difference]: Start difference. First operand has 82 places, 55 transitions, 284 flow. Second operand 8 states and 2773 transitions. [2022-12-13 22:26:20,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 172 transitions, 1144 flow [2022-12-13 22:26:21,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 172 transitions, 1120 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 22:26:21,017 INFO L231 Difference]: Finished difference. Result has 89 places, 59 transitions, 331 flow [2022-12-13 22:26:21,017 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=331, PETRI_PLACES=89, PETRI_TRANSITIONS=59} [2022-12-13 22:26:21,017 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 24 predicate places. [2022-12-13 22:26:21,017 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 59 transitions, 331 flow [2022-12-13 22:26:21,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 332.6) internal successors, (3326), 10 states have internal predecessors, (3326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:21,017 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:26:21,017 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:26:21,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:26:21,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:26:21,218 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:26:21,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:26:21,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1463572527, now seen corresponding path program 1 times [2022-12-13 22:26:21,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:26:21,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988516260] [2022-12-13 22:26:21,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:21,221 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 [2022-12-13 22:26:21,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:26:21,224 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:26:21,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:26:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:21,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 22:26:21,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:26:21,600 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 5 [2022-12-13 22:26:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:26:21,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:26:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:26:21,930 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:26:21,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988516260] [2022-12-13 22:26:21,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988516260] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:26:21,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 22:26:21,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-13 22:26:21,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374110860] [2022-12-13 22:26:21,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 22:26:21,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 22:26:21,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:26:21,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 22:26:21,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 22:26:24,556 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 839 [2022-12-13 22:26:24,557 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 59 transitions, 331 flow. Second operand has 10 states, 10 states have (on average 339.4) internal successors, (3394), 10 states have internal predecessors, (3394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:24,557 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:26:24,557 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 839 [2022-12-13 22:26:24,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:26:28,971 INFO L130 PetriNetUnfolder]: 15543/22492 cut-off events. [2022-12-13 22:26:28,971 INFO L131 PetriNetUnfolder]: For 30083/30083 co-relation queries the response was YES. [2022-12-13 22:26:29,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69601 conditions, 22492 events. 15543/22492 cut-off events. For 30083/30083 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 130939 event pairs, 4417 based on Foata normal form. 1074/22398 useless extension candidates. Maximal degree in co-relation 69575. Up to 7434 conditions per place. [2022-12-13 22:26:29,078 INFO L137 encePairwiseOnDemand]: 834/839 looper letters, 163 selfloop transitions, 7 changer transitions 0/170 dead transitions. [2022-12-13 22:26:29,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 170 transitions, 1157 flow [2022-12-13 22:26:29,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 22:26:29,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 22:26:29,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2827 transitions. [2022-12-13 22:26:29,082 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4211859356376639 [2022-12-13 22:26:29,082 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2827 transitions. [2022-12-13 22:26:29,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2827 transitions. [2022-12-13 22:26:29,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:26:29,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2827 transitions. [2022-12-13 22:26:29,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 353.375) internal successors, (2827), 8 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:29,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 839.0) internal successors, (7551), 9 states have internal predecessors, (7551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:29,089 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 839.0) internal successors, (7551), 9 states have internal predecessors, (7551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:29,089 INFO L175 Difference]: Start difference. First operand has 89 places, 59 transitions, 331 flow. Second operand 8 states and 2827 transitions. [2022-12-13 22:26:29,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 170 transitions, 1157 flow [2022-12-13 22:26:29,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 170 transitions, 1140 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-12-13 22:26:29,194 INFO L231 Difference]: Finished difference. Result has 93 places, 59 transitions, 334 flow [2022-12-13 22:26:29,194 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=334, PETRI_PLACES=93, PETRI_TRANSITIONS=59} [2022-12-13 22:26:29,194 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 28 predicate places. [2022-12-13 22:26:29,194 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 59 transitions, 334 flow [2022-12-13 22:26:29,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 339.4) internal successors, (3394), 10 states have internal predecessors, (3394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:29,195 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:26:29,195 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:26:29,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-13 22:26:29,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:26:29,396 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:26:29,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:26:29,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1962698850, now seen corresponding path program 1 times [2022-12-13 22:26:29,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:26:29,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333971265] [2022-12-13 22:26:29,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:29,399 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 [2022-12-13 22:26:29,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:26:29,402 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:26:29,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:26:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:29,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 22:26:29,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:26:29,709 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 5 [2022-12-13 22:26:29,792 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:26:29,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:26:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:26:30,099 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:26:30,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333971265] [2022-12-13 22:26:30,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333971265] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:26:30,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 22:26:30,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-13 22:26:30,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245246677] [2022-12-13 22:26:30,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 22:26:30,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 22:26:30,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:26:30,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 22:26:30,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 22:26:33,627 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 839 [2022-12-13 22:26:33,628 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 59 transitions, 334 flow. Second operand has 10 states, 10 states have (on average 339.6) internal successors, (3396), 10 states have internal predecessors, (3396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:33,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:26:33,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 839 [2022-12-13 22:26:33,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:26:41,401 INFO L130 PetriNetUnfolder]: 33813/48814 cut-off events. [2022-12-13 22:26:41,402 INFO L131 PetriNetUnfolder]: For 69391/69391 co-relation queries the response was YES. [2022-12-13 22:26:41,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149096 conditions, 48814 events. 33813/48814 cut-off events. For 69391/69391 co-relation queries the response was YES. Maximal size of possible extension queue 1168. Compared 317942 event pairs, 10121 based on Foata normal form. 0/46550 useless extension candidates. Maximal degree in co-relation 149070. Up to 16608 conditions per place. [2022-12-13 22:26:41,720 INFO L137 encePairwiseOnDemand]: 834/839 looper letters, 178 selfloop transitions, 7 changer transitions 0/185 dead transitions. [2022-12-13 22:26:41,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 185 transitions, 1396 flow [2022-12-13 22:26:41,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 22:26:41,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 22:26:41,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2822 transitions. [2022-12-13 22:26:41,724 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4204410011918951 [2022-12-13 22:26:41,724 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2822 transitions. [2022-12-13 22:26:41,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2822 transitions. [2022-12-13 22:26:41,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:26:41,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2822 transitions. [2022-12-13 22:26:41,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 352.75) internal successors, (2822), 8 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:41,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 839.0) internal successors, (7551), 9 states have internal predecessors, (7551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:41,731 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 839.0) internal successors, (7551), 9 states have internal predecessors, (7551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:41,731 INFO L175 Difference]: Start difference. First operand has 93 places, 59 transitions, 334 flow. Second operand 8 states and 2822 transitions. [2022-12-13 22:26:41,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 185 transitions, 1396 flow [2022-12-13 22:26:41,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 185 transitions, 1352 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 22:26:41,786 INFO L231 Difference]: Finished difference. Result has 97 places, 62 transitions, 362 flow [2022-12-13 22:26:41,786 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=362, PETRI_PLACES=97, PETRI_TRANSITIONS=62} [2022-12-13 22:26:41,787 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 32 predicate places. [2022-12-13 22:26:41,787 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 62 transitions, 362 flow [2022-12-13 22:26:41,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 339.6) internal successors, (3396), 10 states have internal predecessors, (3396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:41,787 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:26:41,787 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:26:41,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-12-13 22:26:41,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:26:41,989 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:26:41,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:26:41,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1962699008, now seen corresponding path program 1 times [2022-12-13 22:26:41,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:26:41,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080158141] [2022-12-13 22:26:41,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:26:41,992 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 [2022-12-13 22:26:41,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:26:41,995 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:26:41,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:26:42,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:26:42,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 22:26:42,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:26:42,584 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 22:26:42,584 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 22:26:42,689 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 22:26:42,690 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-13 22:26:42,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:26:42,793 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 [2022-12-13 22:26:42,802 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 22:26:42,802 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 [2022-12-13 22:26:42,841 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 22:26:42,842 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 12 treesize of output 14 [2022-12-13 22:26:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:26:42,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:26:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:26:45,484 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:26:45,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080158141] [2022-12-13 22:26:45,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080158141] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:26:45,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 22:26:45,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 9 [2022-12-13 22:26:45,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072618039] [2022-12-13 22:26:45,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 22:26:45,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 22:26:45,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:26:45,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 22:26:45,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-12-13 22:26:48,682 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] [2022-12-13 22:26:52,227 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 839 [2022-12-13 22:26:52,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 62 transitions, 362 flow. Second operand has 11 states, 11 states have (on average 332.72727272727275) internal successors, (3660), 11 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:52,229 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:26:52,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 839 [2022-12-13 22:26:52,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:26:59,251 INFO L130 PetriNetUnfolder]: 27723/40090 cut-off events. [2022-12-13 22:26:59,251 INFO L131 PetriNetUnfolder]: For 62056/62056 co-relation queries the response was YES. [2022-12-13 22:26:59,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129823 conditions, 40090 events. 27723/40090 cut-off events. For 62056/62056 co-relation queries the response was YES. Maximal size of possible extension queue 944. Compared 254825 event pairs, 8173 based on Foata normal form. 2634/41584 useless extension candidates. Maximal degree in co-relation 129794. Up to 13712 conditions per place. [2022-12-13 22:26:59,538 INFO L137 encePairwiseOnDemand]: 833/839 looper letters, 174 selfloop transitions, 8 changer transitions 0/182 dead transitions. [2022-12-13 22:26:59,538 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 182 transitions, 1362 flow [2022-12-13 22:26:59,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 22:26:59,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 22:26:59,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2763 transitions. [2022-12-13 22:26:59,542 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4116507747318236 [2022-12-13 22:26:59,542 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2763 transitions. [2022-12-13 22:26:59,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2763 transitions. [2022-12-13 22:26:59,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:26:59,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2763 transitions. [2022-12-13 22:26:59,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 345.375) internal successors, (2763), 8 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:59,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 839.0) internal successors, (7551), 9 states have internal predecessors, (7551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:59,549 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 839.0) internal successors, (7551), 9 states have internal predecessors, (7551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:26:59,549 INFO L175 Difference]: Start difference. First operand has 97 places, 62 transitions, 362 flow. Second operand 8 states and 2763 transitions. [2022-12-13 22:26:59,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 182 transitions, 1362 flow [2022-12-13 22:27:00,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 182 transitions, 1351 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-12-13 22:27:00,068 INFO L231 Difference]: Finished difference. Result has 104 places, 62 transitions, 380 flow [2022-12-13 22:27:00,068 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=380, PETRI_PLACES=104, PETRI_TRANSITIONS=62} [2022-12-13 22:27:00,068 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 39 predicate places. [2022-12-13 22:27:00,068 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 62 transitions, 380 flow [2022-12-13 22:27:00,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 332.72727272727275) internal successors, (3660), 11 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:00,069 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:27:00,069 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:27:00,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-12-13 22:27:00,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:27:00,270 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:27:00,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:27:00,271 INFO L85 PathProgramCache]: Analyzing trace with hash 930077808, now seen corresponding path program 2 times [2022-12-13 22:27:00,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:27:00,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [553810356] [2022-12-13 22:27:00,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:27:00,273 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 [2022-12-13 22:27:00,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:27:00,275 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:27:00,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:27:00,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 22:27:00,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:27:00,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 22:27:00,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:27:00,676 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 22:27:00,676 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 22:27:00,772 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 22:27:00,772 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-13 22:27:00,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:27:00,837 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 [2022-12-13 22:27:00,848 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 22:27:00,848 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 [2022-12-13 22:27:00,886 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 22:27:00,886 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 12 treesize of output 14 [2022-12-13 22:27:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 22:27:01,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:27:01,021 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:27:01,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [553810356] [2022-12-13 22:27:01,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [553810356] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:27:01,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:27:01,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 22:27:01,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992513043] [2022-12-13 22:27:01,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:27:01,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 22:27:01,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:27:01,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 22:27:01,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 22:27:01,809 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 839 [2022-12-13 22:27:01,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 62 transitions, 380 flow. Second operand has 6 states, 6 states have (on average 332.5) internal successors, (1995), 6 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:01,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:27:01,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 839 [2022-12-13 22:27:01,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:27:07,277 INFO L130 PetriNetUnfolder]: 25693/37182 cut-off events. [2022-12-13 22:27:07,277 INFO L131 PetriNetUnfolder]: For 82860/82860 co-relation queries the response was YES. [2022-12-13 22:27:07,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124431 conditions, 37182 events. 25693/37182 cut-off events. For 82860/82860 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 229509 event pairs, 23757 based on Foata normal form. 878/37002 useless extension candidates. Maximal degree in co-relation 124399. Up to 37164 conditions per place. [2022-12-13 22:27:07,534 INFO L137 encePairwiseOnDemand]: 835/839 looper letters, 58 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2022-12-13 22:27:07,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 61 transitions, 489 flow [2022-12-13 22:27:07,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 22:27:07,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 22:27:07,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1686 transitions. [2022-12-13 22:27:07,537 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4019070321811681 [2022-12-13 22:27:07,537 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1686 transitions. [2022-12-13 22:27:07,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1686 transitions. [2022-12-13 22:27:07,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:27:07,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1686 transitions. [2022-12-13 22:27:07,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 337.2) internal successors, (1686), 5 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:07,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 839.0) internal successors, (5034), 6 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:07,541 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 839.0) internal successors, (5034), 6 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:07,541 INFO L175 Difference]: Start difference. First operand has 104 places, 62 transitions, 380 flow. Second operand 5 states and 1686 transitions. [2022-12-13 22:27:07,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 61 transitions, 489 flow [2022-12-13 22:27:07,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 61 transitions, 465 flow, removed 1 selfloop flow, removed 11 redundant places. [2022-12-13 22:27:07,707 INFO L231 Difference]: Finished difference. Result has 96 places, 61 transitions, 349 flow [2022-12-13 22:27:07,707 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=349, PETRI_PLACES=96, PETRI_TRANSITIONS=61} [2022-12-13 22:27:07,707 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 31 predicate places. [2022-12-13 22:27:07,707 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 61 transitions, 349 flow [2022-12-13 22:27:07,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 332.5) internal successors, (1995), 6 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:07,708 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:27:07,708 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:27:07,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-12-13 22:27:07,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:27:07,909 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:27:07,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:27:07,910 INFO L85 PathProgramCache]: Analyzing trace with hash 930077650, now seen corresponding path program 2 times [2022-12-13 22:27:07,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:27:07,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430831405] [2022-12-13 22:27:07,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:27:07,912 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 [2022-12-13 22:27:07,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:27:07,914 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:27:07,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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 [2022-12-13 22:27:08,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:27:08,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:27:08,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 22:27:08,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:27:08,515 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 22:27:08,516 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 22:27:08,590 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 22:27:08,590 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-13 22:27:08,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:27:08,642 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 [2022-12-13 22:27:08,649 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 22:27:08,649 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 [2022-12-13 22:27:08,682 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 22:27:08,682 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 12 treesize of output 14 [2022-12-13 22:27:08,799 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:27:08,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:27:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:27:11,891 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:27:11,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430831405] [2022-12-13 22:27:11,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430831405] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:27:11,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 22:27:11,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2022-12-13 22:27:11,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623236919] [2022-12-13 22:27:11,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 22:27:11,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 22:27:11,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:27:11,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 22:27:11,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-12-13 22:27:20,847 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] [2022-12-13 22:27:24,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:27:26,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:27:32,291 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 839 [2022-12-13 22:27:32,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 61 transitions, 349 flow. Second operand has 17 states, 17 states have (on average 330.11764705882354) internal successors, (5612), 17 states have internal predecessors, (5612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:32,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:27:32,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 839 [2022-12-13 22:27:32,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:27:40,511 INFO L130 PetriNetUnfolder]: 29753/43048 cut-off events. [2022-12-13 22:27:40,511 INFO L131 PetriNetUnfolder]: For 63697/63697 co-relation queries the response was YES. [2022-12-13 22:27:40,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132686 conditions, 43048 events. 29753/43048 cut-off events. For 63697/63697 co-relation queries the response was YES. Maximal size of possible extension queue 994. Compared 275637 event pairs, 8173 based on Foata normal form. 878/42704 useless extension candidates. Maximal degree in co-relation 132658. Up to 13712 conditions per place. [2022-12-13 22:27:40,784 INFO L137 encePairwiseOnDemand]: 834/839 looper letters, 204 selfloop transitions, 8 changer transitions 0/212 dead transitions. [2022-12-13 22:27:40,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 212 transitions, 1572 flow [2022-12-13 22:27:40,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 22:27:40,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-13 22:27:40,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3093 transitions. [2022-12-13 22:27:40,788 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4096146205800556 [2022-12-13 22:27:40,788 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3093 transitions. [2022-12-13 22:27:40,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3093 transitions. [2022-12-13 22:27:40,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:27:40,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3093 transitions. [2022-12-13 22:27:40,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 343.6666666666667) internal successors, (3093), 9 states have internal predecessors, (3093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:40,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 839.0) internal successors, (8390), 10 states have internal predecessors, (8390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:40,801 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 839.0) internal successors, (8390), 10 states have internal predecessors, (8390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:40,801 INFO L175 Difference]: Start difference. First operand has 96 places, 61 transitions, 349 flow. Second operand 9 states and 3093 transitions. [2022-12-13 22:27:40,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 212 transitions, 1572 flow [2022-12-13 22:27:41,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 212 transitions, 1567 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 22:27:41,248 INFO L231 Difference]: Finished difference. Result has 102 places, 62 transitions, 370 flow [2022-12-13 22:27:41,248 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=370, PETRI_PLACES=102, PETRI_TRANSITIONS=62} [2022-12-13 22:27:41,249 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 37 predicate places. [2022-12-13 22:27:41,249 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 62 transitions, 370 flow [2022-12-13 22:27:41,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 330.11764705882354) internal successors, (5612), 17 states have internal predecessors, (5612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:27:41,250 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:27:41,250 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:27:41,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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)] Ended with exit code 0 [2022-12-13 22:27:41,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:27:41,451 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:27:41,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:27:41,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1943260388, now seen corresponding path program 2 times [2022-12-13 22:27:41,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:27:41,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031280469] [2022-12-13 22:27:41,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:27:41,454 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 [2022-12-13 22:27:41,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:27:41,456 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:27:41,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-12-13 22:27:41,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:27:41,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:27:41,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 22:27:41,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:27:42,019 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 22:27:42,020 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-13 22:27:42,145 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 22:27:42,145 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 22:27:42,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:27:42,224 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 [2022-12-13 22:27:42,234 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 22:27:42,235 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 [2022-12-13 22:27:42,276 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 22:27:42,277 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 12 treesize of output 14 [2022-12-13 22:27:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:27:42,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:27:45,512 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:27:45,512 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:27:45,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031280469] [2022-12-13 22:27:45,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031280469] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:27:45,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 22:27:45,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2022-12-13 22:27:45,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955897656] [2022-12-13 22:27:45,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 22:27:45,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 22:27:45,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:27:45,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 22:27:45,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-12-13 22:27:48,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:27:51,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:27:53,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:27:56,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:28:00,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:28:03,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:28:04,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:28:07,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:28:10,241 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] [2022-12-13 22:28:16,165 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 839 [2022-12-13 22:28:16,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 62 transitions, 370 flow. Second operand has 17 states, 17 states have (on average 327.11764705882354) internal successors, (5561), 17 states have internal predecessors, (5561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:16,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:28:16,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 839 [2022-12-13 22:28:16,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:28:25,631 INFO L130 PetriNetUnfolder]: 36237/52404 cut-off events. [2022-12-13 22:28:25,631 INFO L131 PetriNetUnfolder]: For 102167/102167 co-relation queries the response was YES. [2022-12-13 22:28:25,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171727 conditions, 52404 events. 36237/52404 cut-off events. For 102167/102167 co-relation queries the response was YES. Maximal size of possible extension queue 1159. Compared 340598 event pairs, 5605 based on Foata normal form. 542/51034 useless extension candidates. Maximal degree in co-relation 171698. Up to 9370 conditions per place. [2022-12-13 22:28:25,995 INFO L137 encePairwiseOnDemand]: 832/839 looper letters, 242 selfloop transitions, 11 changer transitions 0/253 dead transitions. [2022-12-13 22:28:25,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 253 transitions, 1881 flow [2022-12-13 22:28:25,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 22:28:25,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 22:28:25,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3422 transitions. [2022-12-13 22:28:25,999 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40786650774731825 [2022-12-13 22:28:25,999 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3422 transitions. [2022-12-13 22:28:25,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3422 transitions. [2022-12-13 22:28:26,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:28:26,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3422 transitions. [2022-12-13 22:28:26,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 342.2) internal successors, (3422), 10 states have internal predecessors, (3422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:26,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 839.0) internal successors, (9229), 11 states have internal predecessors, (9229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:26,007 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 839.0) internal successors, (9229), 11 states have internal predecessors, (9229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:26,007 INFO L175 Difference]: Start difference. First operand has 102 places, 62 transitions, 370 flow. Second operand 10 states and 3422 transitions. [2022-12-13 22:28:26,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 253 transitions, 1881 flow [2022-12-13 22:28:26,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 253 transitions, 1793 flow, removed 7 selfloop flow, removed 7 redundant places. [2022-12-13 22:28:26,232 INFO L231 Difference]: Finished difference. Result has 106 places, 65 transitions, 410 flow [2022-12-13 22:28:26,232 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=410, PETRI_PLACES=106, PETRI_TRANSITIONS=65} [2022-12-13 22:28:26,232 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 41 predicate places. [2022-12-13 22:28:26,232 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 65 transitions, 410 flow [2022-12-13 22:28:26,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 327.11764705882354) internal successors, (5561), 17 states have internal predecessors, (5561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:26,233 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:28:26,233 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:28:26,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-12-13 22:28:26,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:28:26,434 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:28:26,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:28:26,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1943260316, now seen corresponding path program 2 times [2022-12-13 22:28:26,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:28:26,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135749343] [2022-12-13 22:28:26,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:28:26,437 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 [2022-12-13 22:28:26,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:28:26,440 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:28:26,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-12-13 22:28:26,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 22:28:26,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:28:26,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 22:28:26,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:28:26,785 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 22:28:26,785 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-13 22:28:26,913 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 22:28:26,914 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-13 22:28:27,024 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 22:28:27,024 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 [2022-12-13 22:28:27,037 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 [2022-12-13 22:28:27,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:28:27,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:28:27,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-13 22:28:27,180 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-12-13 22:28:27,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 22:28:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-12-13 22:28:27,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:28:27,585 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:28:27,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135749343] [2022-12-13 22:28:27,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135749343] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:28:27,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:28:27,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 22:28:27,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155313000] [2022-12-13 22:28:27,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:28:27,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:28:27,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:28:27,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:28:27,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:28:28,351 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 331 out of 839 [2022-12-13 22:28:28,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 65 transitions, 410 flow. Second operand has 5 states, 5 states have (on average 333.4) internal successors, (1667), 5 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:28,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:28:28,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 331 of 839 [2022-12-13 22:28:28,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:28:36,373 INFO L130 PetriNetUnfolder]: 33569/48652 cut-off events. [2022-12-13 22:28:36,373 INFO L131 PetriNetUnfolder]: For 80860/80860 co-relation queries the response was YES. [2022-12-13 22:28:36,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159741 conditions, 48652 events. 33569/48652 cut-off events. For 80860/80860 co-relation queries the response was YES. Maximal size of possible extension queue 1061. Compared 308817 event pairs, 31263 based on Foata normal form. 0/47884 useless extension candidates. Maximal degree in co-relation 159710. Up to 48640 conditions per place. [2022-12-13 22:28:36,772 INFO L137 encePairwiseOnDemand]: 835/839 looper letters, 60 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2022-12-13 22:28:36,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 63 transitions, 519 flow [2022-12-13 22:28:36,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 22:28:36,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 22:28:36,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1690 transitions. [2022-12-13 22:28:36,776 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4028605482717521 [2022-12-13 22:28:36,776 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1690 transitions. [2022-12-13 22:28:36,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1690 transitions. [2022-12-13 22:28:36,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:28:36,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1690 transitions. [2022-12-13 22:28:36,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 338.0) internal successors, (1690), 5 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:36,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 839.0) internal successors, (5034), 6 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:36,783 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 839.0) internal successors, (5034), 6 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:36,783 INFO L175 Difference]: Start difference. First operand has 106 places, 65 transitions, 410 flow. Second operand 5 states and 1690 transitions. [2022-12-13 22:28:36,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 63 transitions, 519 flow [2022-12-13 22:28:37,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 63 transitions, 501 flow, removed 2 selfloop flow, removed 7 redundant places. [2022-12-13 22:28:37,058 INFO L231 Difference]: Finished difference. Result has 102 places, 63 transitions, 381 flow [2022-12-13 22:28:37,058 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=381, PETRI_PLACES=102, PETRI_TRANSITIONS=63} [2022-12-13 22:28:37,059 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 37 predicate places. [2022-12-13 22:28:37,059 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 63 transitions, 381 flow [2022-12-13 22:28:37,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 333.4) internal successors, (1667), 5 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:37,059 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:28:37,059 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:28:37,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-12-13 22:28:37,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:28:37,260 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:28:37,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:28:37,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1232352384, now seen corresponding path program 3 times [2022-12-13 22:28:37,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:28:37,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793903251] [2022-12-13 22:28:37,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:28:37,264 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 [2022-12-13 22:28:37,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:28:37,267 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:28:37,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-12-13 22:28:37,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 22:28:37,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:28:38,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 22:28:38,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:28:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:28:38,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:28:38,173 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:28:38,173 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:28:38,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793903251] [2022-12-13 22:28:38,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793903251] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:28:38,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 22:28:38,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-12-13 22:28:38,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446193291] [2022-12-13 22:28:38,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 22:28:38,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 22:28:38,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:28:38,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 22:28:38,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-12-13 22:28:38,472 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 352 out of 839 [2022-12-13 22:28:38,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 63 transitions, 381 flow. Second operand has 14 states, 14 states have (on average 353.85714285714283) internal successors, (4954), 14 states have internal predecessors, (4954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:38,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:28:38,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 352 of 839 [2022-12-13 22:28:38,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:28:46,576 INFO L130 PetriNetUnfolder]: 30281/44368 cut-off events. [2022-12-13 22:28:46,577 INFO L131 PetriNetUnfolder]: For 75545/75545 co-relation queries the response was YES. [2022-12-13 22:28:46,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137708 conditions, 44368 events. 30281/44368 cut-off events. For 75545/75545 co-relation queries the response was YES. Maximal size of possible extension queue 999. Compared 291696 event pairs, 2611 based on Foata normal form. 1992/45644 useless extension candidates. Maximal degree in co-relation 137677. Up to 6636 conditions per place. [2022-12-13 22:28:46,942 INFO L137 encePairwiseOnDemand]: 836/839 looper letters, 238 selfloop transitions, 6 changer transitions 0/244 dead transitions. [2022-12-13 22:28:46,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 244 transitions, 1918 flow [2022-12-13 22:28:46,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 22:28:46,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 22:28:46,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2966 transitions. [2022-12-13 22:28:46,946 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4418951132300358 [2022-12-13 22:28:46,946 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2966 transitions. [2022-12-13 22:28:46,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2966 transitions. [2022-12-13 22:28:46,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:28:46,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2966 transitions. [2022-12-13 22:28:46,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 370.75) internal successors, (2966), 8 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:46,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 839.0) internal successors, (7551), 9 states have internal predecessors, (7551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:46,953 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 839.0) internal successors, (7551), 9 states have internal predecessors, (7551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:46,953 INFO L175 Difference]: Start difference. First operand has 102 places, 63 transitions, 381 flow. Second operand 8 states and 2966 transitions. [2022-12-13 22:28:46,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 244 transitions, 1918 flow [2022-12-13 22:28:47,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 244 transitions, 1900 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-12-13 22:28:47,732 INFO L231 Difference]: Finished difference. Result has 99 places, 61 transitions, 357 flow [2022-12-13 22:28:47,733 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=357, PETRI_PLACES=99, PETRI_TRANSITIONS=61} [2022-12-13 22:28:47,733 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 34 predicate places. [2022-12-13 22:28:47,733 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 61 transitions, 357 flow [2022-12-13 22:28:47,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 353.85714285714283) internal successors, (4954), 14 states have internal predecessors, (4954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:47,733 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:28:47,733 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:28:47,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-12-13 22:28:47,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:28:47,935 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:28:47,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:28:47,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1818017297, now seen corresponding path program 2 times [2022-12-13 22:28:47,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:28:47,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800907521] [2022-12-13 22:28:47,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:28:47,938 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:28:47,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:28:47,940 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:28:47,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-12-13 22:28:48,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 22:28:48,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:28:48,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 22:28:48,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:28:48,145 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 5 [2022-12-13 22:28:48,179 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 22:28:48,179 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 12 treesize of output 14 [2022-12-13 22:28:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-12-13 22:28:48,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:28:48,350 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:28:48,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800907521] [2022-12-13 22:28:48,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800907521] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:28:48,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:28:48,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 22:28:48,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063636069] [2022-12-13 22:28:48,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:28:48,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:28:48,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:28:48,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:28:48,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:28:48,841 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 839 [2022-12-13 22:28:48,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 61 transitions, 357 flow. Second operand has 5 states, 5 states have (on average 341.8) internal successors, (1709), 5 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:48,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:28:48,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 839 [2022-12-13 22:28:48,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:28:54,886 INFO L130 PetriNetUnfolder]: 28641/42012 cut-off events. [2022-12-13 22:28:54,887 INFO L131 PetriNetUnfolder]: For 48703/48703 co-relation queries the response was YES. [2022-12-13 22:28:55,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129956 conditions, 42012 events. 28641/42012 cut-off events. For 48703/48703 co-relation queries the response was YES. Maximal size of possible extension queue 951. Compared 269800 event pairs, 27447 based on Foata normal form. 0/42012 useless extension candidates. Maximal degree in co-relation 129930. Up to 41994 conditions per place. [2022-12-13 22:28:55,169 INFO L137 encePairwiseOnDemand]: 835/839 looper letters, 57 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2022-12-13 22:28:55,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 60 transitions, 471 flow [2022-12-13 22:28:55,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 22:28:55,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 22:28:55,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1728 transitions. [2022-12-13 22:28:55,172 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41191895113230037 [2022-12-13 22:28:55,172 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1728 transitions. [2022-12-13 22:28:55,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1728 transitions. [2022-12-13 22:28:55,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:28:55,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1728 transitions. [2022-12-13 22:28:55,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 345.6) internal successors, (1728), 5 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:55,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 839.0) internal successors, (5034), 6 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:55,176 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 839.0) internal successors, (5034), 6 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:55,176 INFO L175 Difference]: Start difference. First operand has 99 places, 61 transitions, 357 flow. Second operand 5 states and 1728 transitions. [2022-12-13 22:28:55,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 60 transitions, 471 flow [2022-12-13 22:28:55,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 60 transitions, 460 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 22:28:55,295 INFO L231 Difference]: Finished difference. Result has 96 places, 60 transitions, 346 flow [2022-12-13 22:28:55,296 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=346, PETRI_PLACES=96, PETRI_TRANSITIONS=60} [2022-12-13 22:28:55,296 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 31 predicate places. [2022-12-13 22:28:55,296 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 60 transitions, 346 flow [2022-12-13 22:28:55,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 341.8) internal successors, (1709), 5 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:28:55,296 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:28:55,296 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:28:55,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-12-13 22:28:55,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:28:55,497 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:28:55,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:28:55,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1818017363, now seen corresponding path program 2 times [2022-12-13 22:28:55,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:28:55,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207672419] [2022-12-13 22:28:55,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:28:55,500 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 [2022-12-13 22:28:55,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:28:55,503 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:28:55,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-12-13 22:28:56,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:28:56,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:28:56,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 22:28:56,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:28:56,082 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 5 [2022-12-13 22:28:56,087 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 [2022-12-13 22:28:56,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:28:56,122 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 [2022-12-13 22:28:56,129 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 22:28:56,130 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 [2022-12-13 22:28:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:28:56,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:28:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:28:57,107 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:28:57,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207672419] [2022-12-13 22:28:57,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207672419] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:28:57,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 22:28:57,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-12-13 22:28:57,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923285196] [2022-12-13 22:28:57,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 22:28:57,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 22:28:57,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:28:57,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 22:28:57,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-12-13 22:29:02,541 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] [2022-12-13 22:29:05,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:29:10,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:29:13,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:29:17,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 22:29:19,838 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] [2022-12-13 22:29:23,166 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 839 [2022-12-13 22:29:23,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 60 transitions, 346 flow. Second operand has 16 states, 16 states have (on average 328.375) internal successors, (5254), 16 states have internal predecessors, (5254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:23,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:29:23,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 839 [2022-12-13 22:29:23,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:29:31,956 INFO L130 PetriNetUnfolder]: 33705/49452 cut-off events. [2022-12-13 22:29:31,956 INFO L131 PetriNetUnfolder]: For 64521/64521 co-relation queries the response was YES. [2022-12-13 22:29:32,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147791 conditions, 49452 events. 33705/49452 cut-off events. For 64521/64521 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 324858 event pairs, 5915 based on Foata normal form. 716/50168 useless extension candidates. Maximal degree in co-relation 147765. Up to 9884 conditions per place. [2022-12-13 22:29:32,266 INFO L137 encePairwiseOnDemand]: 833/839 looper letters, 224 selfloop transitions, 10 changer transitions 0/234 dead transitions. [2022-12-13 22:29:32,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 234 transitions, 1662 flow [2022-12-13 22:29:32,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 22:29:32,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 22:29:32,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 3406 transitions. [2022-12-13 22:29:32,270 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4059594755661502 [2022-12-13 22:29:32,270 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 3406 transitions. [2022-12-13 22:29:32,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 3406 transitions. [2022-12-13 22:29:32,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:29:32,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 3406 transitions. [2022-12-13 22:29:32,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 340.6) internal successors, (3406), 10 states have internal predecessors, (3406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:32,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 839.0) internal successors, (9229), 11 states have internal predecessors, (9229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:32,278 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 839.0) internal successors, (9229), 11 states have internal predecessors, (9229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:32,278 INFO L175 Difference]: Start difference. First operand has 96 places, 60 transitions, 346 flow. Second operand 10 states and 3406 transitions. [2022-12-13 22:29:32,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 234 transitions, 1662 flow [2022-12-13 22:29:32,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 234 transitions, 1657 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 22:29:32,696 INFO L231 Difference]: Finished difference. Result has 104 places, 62 transitions, 386 flow [2022-12-13 22:29:32,696 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=386, PETRI_PLACES=104, PETRI_TRANSITIONS=62} [2022-12-13 22:29:32,696 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 39 predicate places. [2022-12-13 22:29:32,696 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 62 transitions, 386 flow [2022-12-13 22:29:32,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 328.375) internal successors, (5254), 16 states have internal predecessors, (5254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:32,697 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:29:32,697 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:29:32,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-12-13 22:29:32,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:29:32,898 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:29:32,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:29:32,899 INFO L85 PathProgramCache]: Analyzing trace with hash 837657280, now seen corresponding path program 3 times [2022-12-13 22:29:32,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:29:32,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792294536] [2022-12-13 22:29:32,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:29:32,901 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 [2022-12-13 22:29:32,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:29:32,904 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:29:32,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-12-13 22:29:34,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 22:29:34,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:29:34,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 22:29:34,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:29:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:29:34,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:29:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:29:34,522 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:29:34,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792294536] [2022-12-13 22:29:34,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792294536] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:29:34,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 22:29:34,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-12-13 22:29:34,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128140232] [2022-12-13 22:29:34,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 22:29:34,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 22:29:34,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:29:34,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 22:29:34,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-12-13 22:29:34,816 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 352 out of 839 [2022-12-13 22:29:34,818 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 62 transitions, 386 flow. Second operand has 14 states, 14 states have (on average 354.2857142857143) internal successors, (4960), 14 states have internal predecessors, (4960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:34,818 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:29:34,818 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 352 of 839 [2022-12-13 22:29:34,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:29:42,818 INFO L130 PetriNetUnfolder]: 30459/45082 cut-off events. [2022-12-13 22:29:42,818 INFO L131 PetriNetUnfolder]: For 80328/80328 co-relation queries the response was YES. [2022-12-13 22:29:42,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138687 conditions, 45082 events. 30459/45082 cut-off events. For 80328/80328 co-relation queries the response was YES. Maximal size of possible extension queue 1000. Compared 300198 event pairs, 753 based on Foata normal form. 1124/46206 useless extension candidates. Maximal degree in co-relation 138659. Up to 7604 conditions per place. [2022-12-13 22:29:43,105 INFO L137 encePairwiseOnDemand]: 835/839 looper letters, 235 selfloop transitions, 6 changer transitions 0/241 dead transitions. [2022-12-13 22:29:43,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 241 transitions, 1781 flow [2022-12-13 22:29:43,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 22:29:43,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 22:29:43,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2970 transitions. [2022-12-13 22:29:43,108 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4424910607866508 [2022-12-13 22:29:43,108 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2970 transitions. [2022-12-13 22:29:43,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2970 transitions. [2022-12-13 22:29:43,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:29:43,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2970 transitions. [2022-12-13 22:29:43,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 371.25) internal successors, (2970), 8 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:43,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 839.0) internal successors, (7551), 9 states have internal predecessors, (7551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:43,115 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 839.0) internal successors, (7551), 9 states have internal predecessors, (7551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:43,115 INFO L175 Difference]: Start difference. First operand has 104 places, 62 transitions, 386 flow. Second operand 8 states and 2970 transitions. [2022-12-13 22:29:43,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 241 transitions, 1781 flow [2022-12-13 22:29:43,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 241 transitions, 1665 flow, removed 14 selfloop flow, removed 13 redundant places. [2022-12-13 22:29:43,380 INFO L231 Difference]: Finished difference. Result has 96 places, 59 transitions, 336 flow [2022-12-13 22:29:43,380 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=336, PETRI_PLACES=96, PETRI_TRANSITIONS=59} [2022-12-13 22:29:43,380 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 31 predicate places. [2022-12-13 22:29:43,380 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 59 transitions, 336 flow [2022-12-13 22:29:43,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 354.2857142857143) internal successors, (4960), 14 states have internal predecessors, (4960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:43,381 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:29:43,381 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:29:43,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-12-13 22:29:43,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:29:43,582 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:29:43,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:29:43,583 INFO L85 PathProgramCache]: Analyzing trace with hash 937116909, now seen corresponding path program 3 times [2022-12-13 22:29:43,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:29:43,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693325557] [2022-12-13 22:29:43,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:29:43,585 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 [2022-12-13 22:29:43,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:29:43,588 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:29:43,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-12-13 22:29:44,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 22:29:44,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:29:44,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 22:29:44,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:29:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:29:44,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:29:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:29:45,036 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:29:45,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693325557] [2022-12-13 22:29:45,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693325557] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:29:45,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 22:29:45,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-12-13 22:29:45,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503941871] [2022-12-13 22:29:45,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 22:29:45,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 22:29:45,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:29:45,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 22:29:45,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-12-13 22:29:45,397 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 352 out of 839 [2022-12-13 22:29:45,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 59 transitions, 336 flow. Second operand has 14 states, 14 states have (on average 354.42857142857144) internal successors, (4962), 14 states have internal predecessors, (4962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:45,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:29:45,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 352 of 839 [2022-12-13 22:29:45,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:29:52,472 INFO L130 PetriNetUnfolder]: 26843/40146 cut-off events. [2022-12-13 22:29:52,472 INFO L131 PetriNetUnfolder]: For 37418/37418 co-relation queries the response was YES. [2022-12-13 22:29:52,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113805 conditions, 40146 events. 26843/40146 cut-off events. For 37418/37418 co-relation queries the response was YES. Maximal size of possible extension queue 903. Compared 265699 event pairs, 853 based on Foata normal form. 1320/41466 useless extension candidates. Maximal degree in co-relation 113783. Up to 6786 conditions per place. [2022-12-13 22:29:52,701 INFO L137 encePairwiseOnDemand]: 835/839 looper letters, 204 selfloop transitions, 6 changer transitions 0/210 dead transitions. [2022-12-13 22:29:52,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 210 transitions, 1368 flow [2022-12-13 22:29:52,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 22:29:52,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 22:29:52,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2953 transitions. [2022-12-13 22:29:52,705 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43995828367103695 [2022-12-13 22:29:52,705 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2953 transitions. [2022-12-13 22:29:52,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2953 transitions. [2022-12-13 22:29:52,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:29:52,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2953 transitions. [2022-12-13 22:29:52,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 369.125) internal successors, (2953), 8 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:52,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 839.0) internal successors, (7551), 9 states have internal predecessors, (7551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:52,711 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 839.0) internal successors, (7551), 9 states have internal predecessors, (7551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:52,711 INFO L175 Difference]: Start difference. First operand has 96 places, 59 transitions, 336 flow. Second operand 8 states and 2953 transitions. [2022-12-13 22:29:52,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 210 transitions, 1368 flow [2022-12-13 22:29:53,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 210 transitions, 1276 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-12-13 22:29:53,068 INFO L231 Difference]: Finished difference. Result has 89 places, 56 transitions, 292 flow [2022-12-13 22:29:53,068 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=292, PETRI_PLACES=89, PETRI_TRANSITIONS=56} [2022-12-13 22:29:53,068 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 24 predicate places. [2022-12-13 22:29:53,068 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 56 transitions, 292 flow [2022-12-13 22:29:53,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 354.42857142857144) internal successors, (4962), 14 states have internal predecessors, (4962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:53,069 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:29:53,069 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:29:53,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-12-13 22:29:53,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:29:53,270 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:29:53,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:29:53,271 INFO L85 PathProgramCache]: Analyzing trace with hash -364255957, now seen corresponding path program 1 times [2022-12-13 22:29:53,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:29:53,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1756863495] [2022-12-13 22:29:53,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:29:53,273 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 [2022-12-13 22:29:53,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:29:53,276 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:29:53,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-12-13 22:29:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:29:53,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 22:29:53,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:29:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:29:53,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:29:53,690 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:29:53,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1756863495] [2022-12-13 22:29:53,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1756863495] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:29:53,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:29:53,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 22:29:53,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888350708] [2022-12-13 22:29:53,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:29:53,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:29:53,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:29:53,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:29:53,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:29:53,751 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 350 out of 839 [2022-12-13 22:29:53,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 56 transitions, 292 flow. Second operand has 4 states, 4 states have (on average 356.25) internal successors, (1425), 4 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:53,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:29:53,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 350 of 839 [2022-12-13 22:29:53,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:29:59,569 INFO L130 PetriNetUnfolder]: 26789/40092 cut-off events. [2022-12-13 22:29:59,569 INFO L131 PetriNetUnfolder]: For 29705/29705 co-relation queries the response was YES. [2022-12-13 22:29:59,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110285 conditions, 40092 events. 26789/40092 cut-off events. For 29705/29705 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 268096 event pairs, 22285 based on Foata normal form. 54/40146 useless extension candidates. Maximal degree in co-relation 110268. Up to 33375 conditions per place. [2022-12-13 22:29:59,853 INFO L137 encePairwiseOnDemand]: 835/839 looper letters, 100 selfloop transitions, 3 changer transitions 2/105 dead transitions. [2022-12-13 22:29:59,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 105 transitions, 705 flow [2022-12-13 22:29:59,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:29:59,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:29:59,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1463 transitions. [2022-12-13 22:29:59,856 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4359356376638856 [2022-12-13 22:29:59,856 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1463 transitions. [2022-12-13 22:29:59,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1463 transitions. [2022-12-13 22:29:59,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:29:59,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1463 transitions. [2022-12-13 22:29:59,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 365.75) internal successors, (1463), 4 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:59,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 839.0) internal successors, (4195), 5 states have internal predecessors, (4195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:59,862 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 839.0) internal successors, (4195), 5 states have internal predecessors, (4195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:59,862 INFO L175 Difference]: Start difference. First operand has 89 places, 56 transitions, 292 flow. Second operand 4 states and 1463 transitions. [2022-12-13 22:29:59,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 105 transitions, 705 flow [2022-12-13 22:29:59,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 105 transitions, 674 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 22:29:59,931 INFO L231 Difference]: Finished difference. Result has 88 places, 57 transitions, 297 flow [2022-12-13 22:29:59,931 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=297, PETRI_PLACES=88, PETRI_TRANSITIONS=57} [2022-12-13 22:29:59,931 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 23 predicate places. [2022-12-13 22:29:59,932 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 57 transitions, 297 flow [2022-12-13 22:29:59,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 356.25) internal successors, (1425), 4 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:29:59,932 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:29:59,932 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:29:59,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-12-13 22:30:00,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:30:00,134 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:30:00,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:30:00,135 INFO L85 PathProgramCache]: Analyzing trace with hash -660667179, now seen corresponding path program 2 times [2022-12-13 22:30:00,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:30:00,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501754527] [2022-12-13 22:30:00,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:30:00,137 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 [2022-12-13 22:30:00,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:30:00,140 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:30:00,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-12-13 22:30:00,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 22:30:00,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:30:00,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 22:30:00,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:30:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:30:00,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:30:00,400 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:30:00,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501754527] [2022-12-13 22:30:00,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501754527] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:30:00,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:30:00,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 22:30:00,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282910550] [2022-12-13 22:30:00,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:30:00,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 22:30:00,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:30:00,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 22:30:00,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 22:30:00,476 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 839 [2022-12-13 22:30:00,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 57 transitions, 297 flow. Second operand has 6 states, 6 states have (on average 347.1666666666667) internal successors, (2083), 6 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:00,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:30:00,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 839 [2022-12-13 22:30:00,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:30:06,628 INFO L130 PetriNetUnfolder]: 26881/40310 cut-off events. [2022-12-13 22:30:06,628 INFO L131 PetriNetUnfolder]: For 29144/29144 co-relation queries the response was YES. [2022-12-13 22:30:06,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113255 conditions, 40310 events. 26881/40310 cut-off events. For 29144/29144 co-relation queries the response was YES. Maximal size of possible extension queue 912. Compared 271877 event pairs, 20573 based on Foata normal form. 66/40376 useless extension candidates. Maximal degree in co-relation 113236. Up to 30889 conditions per place. [2022-12-13 22:30:06,863 INFO L137 encePairwiseOnDemand]: 832/839 looper letters, 147 selfloop transitions, 14 changer transitions 20/181 dead transitions. [2022-12-13 22:30:06,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 181 transitions, 1224 flow [2022-12-13 22:30:06,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 22:30:06,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 22:30:06,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2856 transitions. [2022-12-13 22:30:06,867 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42550655542312277 [2022-12-13 22:30:06,867 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2856 transitions. [2022-12-13 22:30:06,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2856 transitions. [2022-12-13 22:30:06,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:30:06,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2856 transitions. [2022-12-13 22:30:06,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 357.0) internal successors, (2856), 8 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:06,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 839.0) internal successors, (7551), 9 states have internal predecessors, (7551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:06,873 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 839.0) internal successors, (7551), 9 states have internal predecessors, (7551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:06,873 INFO L175 Difference]: Start difference. First operand has 88 places, 57 transitions, 297 flow. Second operand 8 states and 2856 transitions. [2022-12-13 22:30:06,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 181 transitions, 1224 flow [2022-12-13 22:30:06,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 181 transitions, 1196 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:30:06,942 INFO L231 Difference]: Finished difference. Result has 98 places, 67 transitions, 386 flow [2022-12-13 22:30:06,942 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=386, PETRI_PLACES=98, PETRI_TRANSITIONS=67} [2022-12-13 22:30:06,942 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 33 predicate places. [2022-12-13 22:30:06,943 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 67 transitions, 386 flow [2022-12-13 22:30:06,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 347.1666666666667) internal successors, (2083), 6 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:06,943 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:30:06,943 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:30:06,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-12-13 22:30:07,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:30:07,144 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:30:07,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:30:07,145 INFO L85 PathProgramCache]: Analyzing trace with hash -2103763287, now seen corresponding path program 3 times [2022-12-13 22:30:07,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:30:07,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675261267] [2022-12-13 22:30:07,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:30:07,148 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 [2022-12-13 22:30:07,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:30:07,151 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:30:07,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-12-13 22:30:07,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-13 22:30:07,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:30:07,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 22:30:07,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:30:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:30:07,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:30:07,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:30:07,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675261267] [2022-12-13 22:30:07,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675261267] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:30:07,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:30:07,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 22:30:07,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362083367] [2022-12-13 22:30:07,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:30:07,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:30:07,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:30:07,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:30:07,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:30:07,462 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 839 [2022-12-13 22:30:07,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 67 transitions, 386 flow. Second operand has 4 states, 4 states have (on average 355.25) internal successors, (1421), 4 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:07,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:30:07,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 839 [2022-12-13 22:30:07,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:30:13,345 INFO L130 PetriNetUnfolder]: 26729/39996 cut-off events. [2022-12-13 22:30:13,345 INFO L131 PetriNetUnfolder]: For 63423/63423 co-relation queries the response was YES. [2022-12-13 22:30:13,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140274 conditions, 39996 events. 26729/39996 cut-off events. For 63423/63423 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 266090 event pairs, 22561 based on Foata normal form. 36/40032 useless extension candidates. Maximal degree in co-relation 140250. Up to 34077 conditions per place. [2022-12-13 22:30:13,595 INFO L137 encePairwiseOnDemand]: 836/839 looper letters, 81 selfloop transitions, 5 changer transitions 7/93 dead transitions. [2022-12-13 22:30:13,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 93 transitions, 708 flow [2022-12-13 22:30:13,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:30:13,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:30:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1094 transitions. [2022-12-13 22:30:13,597 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4346444179578864 [2022-12-13 22:30:13,597 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1094 transitions. [2022-12-13 22:30:13,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1094 transitions. [2022-12-13 22:30:13,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:30:13,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1094 transitions. [2022-12-13 22:30:13,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 364.6666666666667) internal successors, (1094), 3 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:13,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 839.0) internal successors, (3356), 4 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:13,600 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 839.0) internal successors, (3356), 4 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:13,600 INFO L175 Difference]: Start difference. First operand has 98 places, 67 transitions, 386 flow. Second operand 3 states and 1094 transitions. [2022-12-13 22:30:13,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 93 transitions, 708 flow [2022-12-13 22:30:13,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 93 transitions, 689 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-12-13 22:30:13,920 INFO L231 Difference]: Finished difference. Result has 97 places, 64 transitions, 370 flow [2022-12-13 22:30:13,920 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=370, PETRI_PLACES=97, PETRI_TRANSITIONS=64} [2022-12-13 22:30:13,921 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 32 predicate places. [2022-12-13 22:30:13,921 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 64 transitions, 370 flow [2022-12-13 22:30:13,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 355.25) internal successors, (1421), 4 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:13,921 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:30:13,921 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:30:13,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-12-13 22:30:14,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:30:14,122 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:30:14,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:30:14,123 INFO L85 PathProgramCache]: Analyzing trace with hash -215711373, now seen corresponding path program 1 times [2022-12-13 22:30:14,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:30:14,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457602026] [2022-12-13 22:30:14,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:30:14,125 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 [2022-12-13 22:30:14,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:30:14,128 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:30:14,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-12-13 22:30:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:30:14,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 22:30:14,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:30:14,796 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:30:14,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:30:14,796 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:30:14,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457602026] [2022-12-13 22:30:14,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457602026] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:30:14,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:30:14,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 22:30:14,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162662726] [2022-12-13 22:30:14,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:30:14,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:30:14,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:30:14,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:30:14,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:30:14,844 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 348 out of 839 [2022-12-13 22:30:14,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 64 transitions, 370 flow. Second operand has 4 states, 4 states have (on average 354.5) internal successors, (1418), 4 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:14,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:30:14,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 348 of 839 [2022-12-13 22:30:14,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:30:20,968 INFO L130 PetriNetUnfolder]: 25719/38456 cut-off events. [2022-12-13 22:30:20,968 INFO L131 PetriNetUnfolder]: For 70130/70130 co-relation queries the response was YES. [2022-12-13 22:30:21,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135212 conditions, 38456 events. 25719/38456 cut-off events. For 70130/70130 co-relation queries the response was YES. Maximal size of possible extension queue 884. Compared 254184 event pairs, 20359 based on Foata normal form. 442/38898 useless extension candidates. Maximal degree in co-relation 135187. Up to 30791 conditions per place. [2022-12-13 22:30:21,232 INFO L137 encePairwiseOnDemand]: 834/839 looper letters, 123 selfloop transitions, 5 changer transitions 0/128 dead transitions. [2022-12-13 22:30:21,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 128 transitions, 973 flow [2022-12-13 22:30:21,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:30:21,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:30:21,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1457 transitions. [2022-12-13 22:30:21,234 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43414779499404055 [2022-12-13 22:30:21,235 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1457 transitions. [2022-12-13 22:30:21,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1457 transitions. [2022-12-13 22:30:21,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:30:21,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1457 transitions. [2022-12-13 22:30:21,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 364.25) internal successors, (1457), 4 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:21,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 839.0) internal successors, (4195), 5 states have internal predecessors, (4195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:21,239 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 839.0) internal successors, (4195), 5 states have internal predecessors, (4195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:21,239 INFO L175 Difference]: Start difference. First operand has 97 places, 64 transitions, 370 flow. Second operand 4 states and 1457 transitions. [2022-12-13 22:30:21,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 128 transitions, 973 flow [2022-12-13 22:30:21,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 128 transitions, 924 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-12-13 22:30:21,465 INFO L231 Difference]: Finished difference. Result has 99 places, 67 transitions, 404 flow [2022-12-13 22:30:21,465 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=404, PETRI_PLACES=99, PETRI_TRANSITIONS=67} [2022-12-13 22:30:21,465 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 34 predicate places. [2022-12-13 22:30:21,465 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 67 transitions, 404 flow [2022-12-13 22:30:21,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 354.5) internal successors, (1418), 4 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:21,466 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:30:21,466 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:30:21,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-12-13 22:30:21,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:30:21,667 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:30:21,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:30:21,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1081524377, now seen corresponding path program 2 times [2022-12-13 22:30:21,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:30:21,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806876730] [2022-12-13 22:30:21,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:30:21,669 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 [2022-12-13 22:30:21,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:30:21,672 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:30:21,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-12-13 22:30:22,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:30:22,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:30:22,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 22:30:22,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:30:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:30:22,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:30:22,116 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:30:22,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806876730] [2022-12-13 22:30:22,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806876730] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:30:22,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:30:22,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 22:30:22,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878969991] [2022-12-13 22:30:22,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:30:22,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:30:22,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:30:22,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:30:22,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 22:30:22,161 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 839 [2022-12-13 22:30:22,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 67 transitions, 404 flow. Second operand has 4 states, 4 states have (on average 355.5) internal successors, (1422), 4 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:22,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:30:22,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 839 [2022-12-13 22:30:22,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:30:27,678 INFO L130 PetriNetUnfolder]: 24833/36958 cut-off events. [2022-12-13 22:30:27,678 INFO L131 PetriNetUnfolder]: For 68710/68710 co-relation queries the response was YES. [2022-12-13 22:30:27,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133183 conditions, 36958 events. 24833/36958 cut-off events. For 68710/68710 co-relation queries the response was YES. Maximal size of possible extension queue 834. Compared 246725 event pairs, 1455 based on Foata normal form. 442/37400 useless extension candidates. Maximal degree in co-relation 133157. Up to 32584 conditions per place. [2022-12-13 22:30:27,969 INFO L137 encePairwiseOnDemand]: 833/839 looper letters, 105 selfloop transitions, 8 changer transitions 1/114 dead transitions. [2022-12-13 22:30:27,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 114 transitions, 872 flow [2022-12-13 22:30:27,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:30:27,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:30:27,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1450 transitions. [2022-12-13 22:30:27,971 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43206197854588796 [2022-12-13 22:30:27,971 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1450 transitions. [2022-12-13 22:30:27,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1450 transitions. [2022-12-13 22:30:27,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:30:27,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1450 transitions. [2022-12-13 22:30:27,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 362.5) internal successors, (1450), 4 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:27,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 839.0) internal successors, (4195), 5 states have internal predecessors, (4195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:27,975 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 839.0) internal successors, (4195), 5 states have internal predecessors, (4195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:27,975 INFO L175 Difference]: Start difference. First operand has 99 places, 67 transitions, 404 flow. Second operand 4 states and 1450 transitions. [2022-12-13 22:30:27,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 114 transitions, 872 flow [2022-12-13 22:30:28,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 114 transitions, 859 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-12-13 22:30:28,203 INFO L231 Difference]: Finished difference. Result has 103 places, 68 transitions, 434 flow [2022-12-13 22:30:28,203 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=434, PETRI_PLACES=103, PETRI_TRANSITIONS=68} [2022-12-13 22:30:28,203 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 38 predicate places. [2022-12-13 22:30:28,203 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 68 transitions, 434 flow [2022-12-13 22:30:28,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 355.5) internal successors, (1422), 4 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:28,204 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:30:28,204 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:30:28,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-12-13 22:30:28,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:30:28,405 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:30:28,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:30:28,406 INFO L85 PathProgramCache]: Analyzing trace with hash 263892453, now seen corresponding path program 1 times [2022-12-13 22:30:28,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:30:28,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212968194] [2022-12-13 22:30:28,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:30:28,408 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 [2022-12-13 22:30:28,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:30:28,411 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:30:28,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-12-13 22:30:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:30:28,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 22:30:28,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:30:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 22:30:28,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:30:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 22:30:28,890 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:30:28,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212968194] [2022-12-13 22:30:28,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212968194] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 22:30:28,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 22:30:28,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-12-13 22:30:28,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242562749] [2022-12-13 22:30:28,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:30:28,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:30:28,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:30:28,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:30:28,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:30:28,950 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 345 out of 839 [2022-12-13 22:30:28,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 68 transitions, 434 flow. Second operand has 5 states, 5 states have (on average 350.6) internal successors, (1753), 5 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:28,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:30:28,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 345 of 839 [2022-12-13 22:30:28,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:30:34,935 INFO L130 PetriNetUnfolder]: 25855/38408 cut-off events. [2022-12-13 22:30:34,935 INFO L131 PetriNetUnfolder]: For 80890/80890 co-relation queries the response was YES. [2022-12-13 22:30:35,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139016 conditions, 38408 events. 25855/38408 cut-off events. For 80890/80890 co-relation queries the response was YES. Maximal size of possible extension queue 847. Compared 250303 event pairs, 1644 based on Foata normal form. 480/38888 useless extension candidates. Maximal degree in co-relation 138988. Up to 21388 conditions per place. [2022-12-13 22:30:35,340 INFO L137 encePairwiseOnDemand]: 831/839 looper letters, 139 selfloop transitions, 34 changer transitions 1/174 dead transitions. [2022-12-13 22:30:35,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 174 transitions, 1425 flow [2022-12-13 22:30:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 22:30:35,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 22:30:35,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2501 transitions. [2022-12-13 22:30:35,344 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42584709688404565 [2022-12-13 22:30:35,345 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2501 transitions. [2022-12-13 22:30:35,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2501 transitions. [2022-12-13 22:30:35,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:30:35,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2501 transitions. [2022-12-13 22:30:35,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 357.2857142857143) internal successors, (2501), 7 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:35,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 839.0) internal successors, (6712), 8 states have internal predecessors, (6712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:35,354 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 839.0) internal successors, (6712), 8 states have internal predecessors, (6712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:35,354 INFO L175 Difference]: Start difference. First operand has 103 places, 68 transitions, 434 flow. Second operand 7 states and 2501 transitions. [2022-12-13 22:30:35,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 174 transitions, 1425 flow [2022-12-13 22:30:35,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 174 transitions, 1369 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-12-13 22:30:35,797 INFO L231 Difference]: Finished difference. Result has 106 places, 88 transitions, 641 flow [2022-12-13 22:30:35,797 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=641, PETRI_PLACES=106, PETRI_TRANSITIONS=88} [2022-12-13 22:30:35,797 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 41 predicate places. [2022-12-13 22:30:35,797 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 88 transitions, 641 flow [2022-12-13 22:30:35,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 350.6) internal successors, (1753), 5 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:35,797 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:30:35,797 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:30:35,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-12-13 22:30:35,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:30:35,999 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:30:36,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:30:36,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1314280501, now seen corresponding path program 2 times [2022-12-13 22:30:36,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:30:36,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420522825] [2022-12-13 22:30:36,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:30:36,003 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 [2022-12-13 22:30:36,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:30:36,006 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:30:36,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-12-13 22:30:36,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:30:36,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:30:36,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 22:30:36,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:30:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:30:36,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:30:36,847 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:30:36,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420522825] [2022-12-13 22:30:36,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420522825] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:30:36,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:30:36,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 22:30:36,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292950761] [2022-12-13 22:30:36,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:30:36,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:30:36,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:30:36,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:30:36,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:30:36,938 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 839 [2022-12-13 22:30:36,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 88 transitions, 641 flow. Second operand has 5 states, 5 states have (on average 351.6) internal successors, (1758), 5 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:36,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:30:36,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 839 [2022-12-13 22:30:36,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:30:43,460 INFO L130 PetriNetUnfolder]: 26146/38853 cut-off events. [2022-12-13 22:30:43,460 INFO L131 PetriNetUnfolder]: For 104713/104713 co-relation queries the response was YES. [2022-12-13 22:30:43,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154060 conditions, 38853 events. 26146/38853 cut-off events. For 104713/104713 co-relation queries the response was YES. Maximal size of possible extension queue 853. Compared 250596 event pairs, 17173 based on Foata normal form. 58/38911 useless extension candidates. Maximal degree in co-relation 154032. Up to 30737 conditions per place. [2022-12-13 22:30:43,813 INFO L137 encePairwiseOnDemand]: 834/839 looper letters, 120 selfloop transitions, 14 changer transitions 17/151 dead transitions. [2022-12-13 22:30:43,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 151 transitions, 1287 flow [2022-12-13 22:30:43,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 22:30:43,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 22:30:43,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1800 transitions. [2022-12-13 22:30:43,815 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42908224076281287 [2022-12-13 22:30:43,815 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1800 transitions. [2022-12-13 22:30:43,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1800 transitions. [2022-12-13 22:30:43,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:30:43,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1800 transitions. [2022-12-13 22:30:43,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 360.0) internal successors, (1800), 5 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:43,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 839.0) internal successors, (5034), 6 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:43,820 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 839.0) internal successors, (5034), 6 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:43,820 INFO L175 Difference]: Start difference. First operand has 106 places, 88 transitions, 641 flow. Second operand 5 states and 1800 transitions. [2022-12-13 22:30:43,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 151 transitions, 1287 flow [2022-12-13 22:30:45,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 151 transitions, 1285 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 22:30:45,175 INFO L231 Difference]: Finished difference. Result has 112 places, 91 transitions, 705 flow [2022-12-13 22:30:45,176 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=705, PETRI_PLACES=112, PETRI_TRANSITIONS=91} [2022-12-13 22:30:45,176 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 47 predicate places. [2022-12-13 22:30:45,176 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 91 transitions, 705 flow [2022-12-13 22:30:45,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 351.6) internal successors, (1758), 5 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:45,176 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:30:45,176 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:30:45,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-12-13 22:30:45,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:30:45,377 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:30:45,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:30:45,378 INFO L85 PathProgramCache]: Analyzing trace with hash -2101500359, now seen corresponding path program 3 times [2022-12-13 22:30:45,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:30:45,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050526247] [2022-12-13 22:30:45,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 22:30:45,380 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 [2022-12-13 22:30:45,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:30:45,383 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:30:45,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-12-13 22:30:45,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 22:30:45,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:30:45,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 22:30:45,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:30:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 22:30:45,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:30:45,789 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:30:45,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050526247] [2022-12-13 22:30:45,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050526247] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:30:45,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:30:45,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 22:30:45,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850148413] [2022-12-13 22:30:45,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:30:45,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:30:45,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:30:45,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:30:45,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:30:45,867 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 345 out of 839 [2022-12-13 22:30:45,868 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 91 transitions, 705 flow. Second operand has 5 states, 5 states have (on average 350.6) internal successors, (1753), 5 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:45,868 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:30:45,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 345 of 839 [2022-12-13 22:30:45,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:30:52,818 INFO L130 PetriNetUnfolder]: 27163/40292 cut-off events. [2022-12-13 22:30:52,819 INFO L131 PetriNetUnfolder]: For 117631/117631 co-relation queries the response was YES. [2022-12-13 22:30:53,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161145 conditions, 40292 events. 27163/40292 cut-off events. For 117631/117631 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 260107 event pairs, 17121 based on Foata normal form. 480/40772 useless extension candidates. Maximal degree in co-relation 161114. Up to 30737 conditions per place. [2022-12-13 22:30:53,164 INFO L137 encePairwiseOnDemand]: 833/839 looper letters, 151 selfloop transitions, 19 changer transitions 0/170 dead transitions. [2022-12-13 22:30:53,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 170 transitions, 1471 flow [2022-12-13 22:30:53,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 22:30:53,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 22:30:53,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2151 transitions. [2022-12-13 22:30:53,167 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4272943980929678 [2022-12-13 22:30:53,168 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2151 transitions. [2022-12-13 22:30:53,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2151 transitions. [2022-12-13 22:30:53,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:30:53,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2151 transitions. [2022-12-13 22:30:53,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 358.5) internal successors, (2151), 6 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:53,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 839.0) internal successors, (5873), 7 states have internal predecessors, (5873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:53,172 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 839.0) internal successors, (5873), 7 states have internal predecessors, (5873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:53,172 INFO L175 Difference]: Start difference. First operand has 112 places, 91 transitions, 705 flow. Second operand 6 states and 2151 transitions. [2022-12-13 22:30:53,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 170 transitions, 1471 flow [2022-12-13 22:30:54,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 170 transitions, 1459 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-13 22:30:54,653 INFO L231 Difference]: Finished difference. Result has 116 places, 95 transitions, 786 flow [2022-12-13 22:30:54,653 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=786, PETRI_PLACES=116, PETRI_TRANSITIONS=95} [2022-12-13 22:30:54,653 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 51 predicate places. [2022-12-13 22:30:54,653 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 95 transitions, 786 flow [2022-12-13 22:30:54,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 350.6) internal successors, (1753), 5 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:54,653 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:30:54,653 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:30:54,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-12-13 22:30:54,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:30:54,855 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:30:54,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:30:54,856 INFO L85 PathProgramCache]: Analyzing trace with hash -201911583, now seen corresponding path program 4 times [2022-12-13 22:30:54,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:30:54,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669970314] [2022-12-13 22:30:54,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 22:30:54,858 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 [2022-12-13 22:30:54,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:30:54,860 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:30:54,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-12-13 22:30:55,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 22:30:55,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:30:55,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 22:30:55,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:30:55,263 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 22:30:55,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:30:55,264 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:30:55,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669970314] [2022-12-13 22:30:55,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669970314] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:30:55,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:30:55,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 22:30:55,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041105688] [2022-12-13 22:30:55,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:30:55,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:30:55,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:30:55,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:30:55,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:30:55,336 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 345 out of 839 [2022-12-13 22:30:55,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 95 transitions, 786 flow. Second operand has 5 states, 5 states have (on average 350.6) internal successors, (1753), 5 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:30:55,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:30:55,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 345 of 839 [2022-12-13 22:30:55,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:31:02,591 INFO L130 PetriNetUnfolder]: 27765/41374 cut-off events. [2022-12-13 22:31:02,591 INFO L131 PetriNetUnfolder]: For 152897/152897 co-relation queries the response was YES. [2022-12-13 22:31:02,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172932 conditions, 41374 events. 27765/41374 cut-off events. For 152897/152897 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 271143 event pairs, 18715 based on Foata normal form. 480/41854 useless extension candidates. Maximal degree in co-relation 172900. Up to 34131 conditions per place. [2022-12-13 22:31:02,947 INFO L137 encePairwiseOnDemand]: 833/839 looper letters, 150 selfloop transitions, 16 changer transitions 1/167 dead transitions. [2022-12-13 22:31:02,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 167 transitions, 1518 flow [2022-12-13 22:31:02,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 22:31:02,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 22:31:02,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2151 transitions. [2022-12-13 22:31:02,950 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4272943980929678 [2022-12-13 22:31:02,950 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2151 transitions. [2022-12-13 22:31:02,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2151 transitions. [2022-12-13 22:31:02,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:31:02,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2151 transitions. [2022-12-13 22:31:02,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 358.5) internal successors, (2151), 6 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:31:02,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 839.0) internal successors, (5873), 7 states have internal predecessors, (5873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:31:02,955 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 839.0) internal successors, (5873), 7 states have internal predecessors, (5873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:31:02,955 INFO L175 Difference]: Start difference. First operand has 116 places, 95 transitions, 786 flow. Second operand 6 states and 2151 transitions. [2022-12-13 22:31:02,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 167 transitions, 1518 flow [2022-12-13 22:31:04,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 167 transitions, 1491 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-12-13 22:31:04,644 INFO L231 Difference]: Finished difference. Result has 120 places, 95 transitions, 802 flow [2022-12-13 22:31:04,644 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=802, PETRI_PLACES=120, PETRI_TRANSITIONS=95} [2022-12-13 22:31:04,644 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 55 predicate places. [2022-12-13 22:31:04,644 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 95 transitions, 802 flow [2022-12-13 22:31:04,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 350.6) internal successors, (1753), 5 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:31:04,644 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:31:04,644 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:31:04,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-12-13 22:31:04,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:31:04,846 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:31:04,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:31:04,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1345054193, now seen corresponding path program 5 times [2022-12-13 22:31:04,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:31:04,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229177848] [2022-12-13 22:31:04,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 22:31:04,848 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 [2022-12-13 22:31:04,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:31:04,851 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:31:04,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-12-13 22:31:05,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 22:31:05,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:31:05,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 22:31:05,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:31:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-13 22:31:05,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:31:05,938 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 22:31:05,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229177848] [2022-12-13 22:31:05,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229177848] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:31:05,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:31:05,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 22:31:05,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478503803] [2022-12-13 22:31:05,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:31:05,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:31:05,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 22:31:05,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:31:05,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 22:31:06,021 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 839 [2022-12-13 22:31:06,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 95 transitions, 802 flow. Second operand has 5 states, 5 states have (on average 351.6) internal successors, (1758), 5 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:31:06,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:31:06,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 839 [2022-12-13 22:31:06,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:31:12,978 INFO L130 PetriNetUnfolder]: 26876/39759 cut-off events. [2022-12-13 22:31:12,978 INFO L131 PetriNetUnfolder]: For 147012/147012 co-relation queries the response was YES. [2022-12-13 22:31:13,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169161 conditions, 39759 events. 26876/39759 cut-off events. For 147012/147012 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 254979 event pairs, 19800 based on Foata normal form. 58/39817 useless extension candidates. Maximal degree in co-relation 169127. Up to 36636 conditions per place. [2022-12-13 22:31:13,321 INFO L137 encePairwiseOnDemand]: 834/839 looper letters, 112 selfloop transitions, 13 changer transitions 17/142 dead transitions. [2022-12-13 22:31:13,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 142 transitions, 1345 flow [2022-12-13 22:31:13,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 22:31:13,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 22:31:13,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1795 transitions. [2022-12-13 22:31:13,324 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42789034564958284 [2022-12-13 22:31:13,324 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1795 transitions. [2022-12-13 22:31:13,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1795 transitions. [2022-12-13 22:31:13,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:31:13,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1795 transitions. [2022-12-13 22:31:13,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 359.0) internal successors, (1795), 5 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:31:13,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 839.0) internal successors, (5034), 6 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:31:13,328 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 839.0) internal successors, (5034), 6 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:31:13,328 INFO L175 Difference]: Start difference. First operand has 120 places, 95 transitions, 802 flow. Second operand 5 states and 1795 transitions. [2022-12-13 22:31:13,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 142 transitions, 1345 flow [2022-12-13 22:31:14,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 142 transitions, 1298 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-12-13 22:31:14,916 INFO L231 Difference]: Finished difference. Result has 119 places, 93 transitions, 763 flow [2022-12-13 22:31:14,916 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=839, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=763, PETRI_PLACES=119, PETRI_TRANSITIONS=93} [2022-12-13 22:31:14,917 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 54 predicate places. [2022-12-13 22:31:14,917 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 93 transitions, 763 flow [2022-12-13 22:31:14,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 351.6) internal successors, (1758), 5 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:31:14,917 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:31:14,917 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:31:14,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-12-13 22:31:15,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 22:31:15,118 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-12-13 22:31:15,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:31:15,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1969210695, now seen corresponding path program 1 times [2022-12-13 22:31:15,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 22:31:15,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874846015] [2022-12-13 22:31:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:31:15,121 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 [2022-12-13 22:31:15,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 22:31:15,124 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -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) [2022-12-13 22:31:15,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8e98943-b25c-42d5-b552-6d5837349505/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-12-13 22:31:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:31:15,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-13 22:31:15,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:31:15,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:31:15,907 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 44 treesize of output 42 [2022-12-13 22:31:16,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 5 [2022-12-13 22:31:16,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:31:16,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:31:16,851 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 22:31:16,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 193 treesize of output 170 [2022-12-13 22:31:18,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:31:18,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:31:18,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:31:18,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:31:18,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:31:18,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:31:18,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:31:18,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:31:18,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:31:18,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:31:18,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:31:18,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:31:18,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:31:18,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:31:18,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:31:18,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:31:18,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:31:18,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:31:18,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:31:18,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:31:18,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:31:19,375 INFO L321 Elim1Store]: treesize reduction 64, result has 63.0 percent of original size [2022-12-13 22:31:19,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 24 select indices, 24 select index equivalence classes, 9 disjoint index pairs (out of 276 index pairs), introduced 16 new quantified variables, introduced 220 case distinctions, treesize of input 472 treesize of output 228 [2022-12-13 22:32:16,250 WARN L233 SmtUtils]: Spent 43.28s on a formula simplification. DAG size of input: 337 DAG size of output: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:32:25,458 WARN L233 SmtUtils]: Spent 8.57s on a formula simplification. DAG size of input: 86 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 22:32:31,547 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 22:32:31,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:36:29,338 WARN L233 SmtUtils]: Spent 3.58m on a formula simplification. DAG size of input: 805 DAG size of output: 724 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-13 22:36:29,343 INFO L321 Elim1Store]: treesize reduction 264, result has 91.6 percent of original size [2022-12-13 22:36:29,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 24 select indices, 24 select index equivalence classes, 0 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 276 case distinctions, treesize of input 23296 treesize of output 21784 [2022-12-13 22:36:30,638 INFO L217 Elim1Store]: Index analysis took 574 ms [2022-12-13 22:36:35,339 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:36:35,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 18 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 48 case distinctions, treesize of input 18491 treesize of output 17380 [2022-12-13 22:36:36,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:36,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:36,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:36,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:36,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:36,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:36,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:36,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:36,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:36,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:36,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:36,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:36,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:37,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:37,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:37,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:37,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:37,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:37,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:37,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:37,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:37,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:37,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:37,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 22:36:37,707 INFO L217 Elim1Store]: Index analysis took 1434 ms [2022-12-13 22:36:51,479 WARN L233 SmtUtils]: Spent 13.76s on a formula simplification that was a NOOP. DAG size: 506 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-13 22:36:51,480 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:36:51,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 20 select indices, 20 select index equivalence classes, 54 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 136 case distinctions, treesize of input 17356 treesize of output 16064 [2022-12-13 22:36:54,189 INFO L217 Elim1Store]: Index analysis took 847 ms [2022-12-13 22:36:59,242 WARN L233 SmtUtils]: Spent 5.04s on a formula simplification that was a NOOP. DAG size: 193 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-13 22:36:59,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 22:36:59,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 18 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 48 case distinctions, treesize of input 14319 treesize of output 11136