./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R --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 c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f --- 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-38b53e6 [2022-11-25 18:03:36,686 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:03:36,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:03:36,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:03:36,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:03:36,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:03:36,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:03:36,722 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:03:36,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:03:36,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:03:36,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:03:36,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:03:36,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:03:36,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:03:36,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:03:36,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:03:36,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:03:36,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:03:36,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:03:36,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:03:36,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:03:36,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:03:36,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:03:36,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:03:36,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:03:36,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:03:36,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:03:36,757 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:03:36,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:03:36,759 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:03:36,760 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:03:36,761 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:03:36,762 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:03:36,764 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:03:36,765 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:03:36,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:03:36,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:03:36,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:03:36,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:03:36,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:03:36,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:03:36,773 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:03:36,801 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:03:36,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:03:36,802 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:03:36,802 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:03:36,803 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:03:36,804 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:03:36,805 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:03:36,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:03:36,805 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:03:36,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:03:36,806 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:03:36,807 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:03:36,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:03:36,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:03:36,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:03:36,808 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:03:36,808 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:03:36,809 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:03:36,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:03:36,809 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:03:36,810 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:03:36,810 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:03:36,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:03:36,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:03:36,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:03:36,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:03:36,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:03:36,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:03:36,813 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:03:36,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:03:36,813 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:03:36,814 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:03:36,814 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:03:36,814 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_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f [2022-11-25 18:03:37,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:03:37,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:03:37,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:03:37,237 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:03:37,237 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:03:37,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2022-11-25 18:03:40,512 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:03:40,800 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:03:40,800 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2022-11-25 18:03:40,812 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/data/5578f18d8/ed4fa7a951f84a27b6b02fd3672dcc89/FLAGd45286ef9 [2022-11-25 18:03:40,829 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/data/5578f18d8/ed4fa7a951f84a27b6b02fd3672dcc89 [2022-11-25 18:03:40,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:03:40,834 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:03:40,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:03:40,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:03:40,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:03:40,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:03:40" (1/1) ... [2022-11-25 18:03:40,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b3618eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:40, skipping insertion in model container [2022-11-25 18:03:40,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:03:40" (1/1) ... [2022-11-25 18:03:40,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:03:40,875 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:03:41,132 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_6a599a70-0e34-4785-ab43-96caca1d8814/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2022-11-25 18:03:41,144 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:03:41,158 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-25 18:03:41,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@154f8d1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:41, skipping insertion in model container [2022-11-25 18:03:41,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:03:41,160 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 18:03:41,162 INFO L158 Benchmark]: Toolchain (without parser) took 327.06ms. Allocated memory is still 188.7MB. Free memory was 148.6MB in the beginning and 138.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 18:03:41,163 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 151.0MB. Free memory is still 94.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:03:41,164 INFO L158 Benchmark]: CACSL2BoogieTranslator took 323.92ms. Allocated memory is still 188.7MB. Free memory was 147.9MB in the beginning and 138.2MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-25 18:03:41,166 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 151.0MB. Free memory is still 94.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 323.92ms. Allocated memory is still 188.7MB. Free memory was 147.9MB in the beginning and 138.2MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 102]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R --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 c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f --- 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-38b53e6 [2022-11-25 18:03:43,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:03:44,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:03:44,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:03:44,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:03:44,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:03:44,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:03:44,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:03:44,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:03:44,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:03:44,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:03:44,102 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:03:44,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:03:44,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:03:44,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:03:44,114 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:03:44,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:03:44,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:03:44,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:03:44,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:03:44,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:03:44,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:03:44,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:03:44,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:03:44,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:03:44,134 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:03:44,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:03:44,136 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:03:44,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:03:44,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:03:44,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:03:44,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:03:44,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:03:44,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:03:44,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:03:44,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:03:44,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:03:44,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:03:44,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:03:44,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:03:44,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:03:44,148 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 18:03:44,177 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:03:44,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:03:44,178 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:03:44,178 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:03:44,179 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:03:44,179 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:03:44,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:03:44,180 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:03:44,181 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:03:44,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:03:44,181 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:03:44,181 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:03:44,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:03:44,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:03:44,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:03:44,182 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:03:44,183 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:03:44,183 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:03:44,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:03:44,184 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:03:44,184 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 18:03:44,184 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 18:03:44,184 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:03:44,185 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:03:44,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:03:44,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:03:44,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:03:44,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:03:44,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:03:44,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:03:44,187 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 18:03:44,187 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 18:03:44,187 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:03:44,187 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:03:44,188 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:03:44,188 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 18:03:44,188 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_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7fdb1595c27c144c3bf111946260cb3946663200a2d53f7fba5455031291c4f [2022-11-25 18:03:44,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:03:44,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:03:44,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:03:44,753 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:03:44,754 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:03:44,756 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2022-11-25 18:03:48,098 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:03:48,364 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:03:48,365 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2022-11-25 18:03:48,374 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/data/ac91a2e0a/3bef464c201c400da8cb8c5256e55753/FLAGd1ecc812b [2022-11-25 18:03:48,391 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/data/ac91a2e0a/3bef464c201c400da8cb8c5256e55753 [2022-11-25 18:03:48,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:03:48,396 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:03:48,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:03:48,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:03:48,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:03:48,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:03:48" (1/1) ... [2022-11-25 18:03:48,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e9a464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:48, skipping insertion in model container [2022-11-25 18:03:48,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:03:48" (1/1) ... [2022-11-25 18:03:48,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:03:48,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:03:48,657 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_6a599a70-0e34-4785-ab43-96caca1d8814/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2022-11-25 18:03:48,672 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:03:48,689 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 18:03:48,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:03:48,715 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_6a599a70-0e34-4785-ab43-96caca1d8814/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2022-11-25 18:03:48,727 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:03:48,749 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:03:48,804 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_6a599a70-0e34-4785-ab43-96caca1d8814/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c[2695,2708] [2022-11-25 18:03:48,810 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:03:48,834 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:03:48,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:48 WrapperNode [2022-11-25 18:03:48,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:03:48,837 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:03:48,837 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:03:48,837 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:03:48,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:48" (1/1) ... [2022-11-25 18:03:48,879 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:48" (1/1) ... [2022-11-25 18:03:48,931 INFO L138 Inliner]: procedures = 27, calls = 37, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 190 [2022-11-25 18:03:48,931 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:03:48,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:03:48,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:03:48,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:03:48,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:48" (1/1) ... [2022-11-25 18:03:48,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:48" (1/1) ... [2022-11-25 18:03:48,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:48" (1/1) ... [2022-11-25 18:03:48,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:48" (1/1) ... [2022-11-25 18:03:48,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:48" (1/1) ... [2022-11-25 18:03:49,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:48" (1/1) ... [2022-11-25 18:03:49,013 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:48" (1/1) ... [2022-11-25 18:03:49,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:48" (1/1) ... [2022-11-25 18:03:49,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:03:49,031 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:03:49,032 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:03:49,032 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:03:49,033 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:48" (1/1) ... [2022-11-25 18:03:49,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:03:49,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:03:49,086 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:03:49,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:03:49,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:03:49,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 18:03:49,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:03:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 18:03:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 18:03:49,155 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 18:03:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 18:03:49,156 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 18:03:49,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:03:49,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:03:49,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:03:49,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:03:49,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 18:03:49,159 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:03:49,400 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:03:49,402 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:03:50,177 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:03:50,191 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:03:50,191 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 18:03:50,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:03:50 BoogieIcfgContainer [2022-11-25 18:03:50,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:03:50,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:03:50,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:03:50,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:03:50,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:03:48" (1/3) ... [2022-11-25 18:03:50,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb89f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:03:50, skipping insertion in model container [2022-11-25 18:03:50,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:03:48" (2/3) ... [2022-11-25 18:03:50,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb89f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:03:50, skipping insertion in model container [2022-11-25 18:03:50,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:03:50" (3/3) ... [2022-11-25 18:03:50,204 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2022-11-25 18:03:50,243 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:03:50,244 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-11-25 18:03:50,244 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:03:50,556 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:03:50,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 268 places, 282 transitions, 580 flow [2022-11-25 18:03:50,777 INFO L130 PetriNetUnfolder]: 21/280 cut-off events. [2022-11-25 18:03:50,778 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:03:50,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 280 events. 21/280 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 396 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 176. Up to 2 conditions per place. [2022-11-25 18:03:50,789 INFO L82 GeneralOperation]: Start removeDead. Operand has 268 places, 282 transitions, 580 flow [2022-11-25 18:03:50,808 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 261 places, 275 transitions, 562 flow [2022-11-25 18:03:50,813 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:03:50,832 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 261 places, 275 transitions, 562 flow [2022-11-25 18:03:50,835 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 261 places, 275 transitions, 562 flow [2022-11-25 18:03:50,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 275 transitions, 562 flow [2022-11-25 18:03:50,925 INFO L130 PetriNetUnfolder]: 21/275 cut-off events. [2022-11-25 18:03:50,925 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:03:50,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 275 events. 21/275 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 399 event pairs, 0 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 176. Up to 2 conditions per place. [2022-11-25 18:03:50,934 INFO L119 LiptonReduction]: Number of co-enabled transitions 8848 [2022-11-25 18:04:25,666 INFO L134 LiptonReduction]: Checked pairs total: 9570 [2022-11-25 18:04:25,666 INFO L136 LiptonReduction]: Total number of compositions: 335 [2022-11-25 18:04:25,696 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:04:25,704 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;@3f47c110, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:04:25,705 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2022-11-25 18:04:25,709 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 18:04:25,709 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:04:25,709 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:04:25,710 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:04:25,711 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:04:25,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:25,717 INFO L85 PathProgramCache]: Analyzing trace with hash 36056, now seen corresponding path program 1 times [2022-11-25 18:04:25,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:04:25,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184381328] [2022-11-25 18:04:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:25,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:25,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:04:25,744 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:04:25,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-25 18:04:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:04:25,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 18:04:25,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:26,107 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 18:04:26,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 18:04:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:04:26,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:04:26,137 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:04:26,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184381328] [2022-11-25 18:04:26,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184381328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:04:26,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:04:26,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:04:26,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034664028] [2022-11-25 18:04:26,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:04:26,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:04:26,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:04:26,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:04:26,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:04:26,464 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 617 [2022-11-25 18:04:26,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:26,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:04:26,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 617 [2022-11-25 18:04:26,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:04:26,915 INFO L130 PetriNetUnfolder]: 455/748 cut-off events. [2022-11-25 18:04:26,915 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-11-25 18:04:26,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1526 conditions, 748 events. 455/748 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 3251 event pairs, 385 based on Foata normal form. 0/260 useless extension candidates. Maximal degree in co-relation 1376. Up to 748 conditions per place. [2022-11-25 18:04:26,930 INFO L137 encePairwiseOnDemand]: 612/617 looper letters, 37 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2022-11-25 18:04:26,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 38 transitions, 164 flow [2022-11-25 18:04:26,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:04:26,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:04:26,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 792 transitions. [2022-11-25 18:04:26,967 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42787682333873583 [2022-11-25 18:04:26,968 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 792 transitions. [2022-11-25 18:04:26,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 792 transitions. [2022-11-25 18:04:26,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:04:26,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 792 transitions. [2022-11-25 18:04:26,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:27,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 617.0) internal successors, (2468), 4 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:27,003 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 617.0) internal successors, (2468), 4 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:27,005 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 96 flow. Second operand 3 states and 792 transitions. [2022-11-25 18:04:27,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 38 transitions, 164 flow [2022-11-25 18:04:27,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 156 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:04:27,020 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 82 flow [2022-11-25 18:04:27,023 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2022-11-25 18:04:27,032 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2022-11-25 18:04:27,032 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 82 flow [2022-11-25 18:04:27,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:27,033 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:04:27,035 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:04:27,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 18:04:27,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:27,264 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:04:27,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:27,264 INFO L85 PathProgramCache]: Analyzing trace with hash 36057, now seen corresponding path program 1 times [2022-11-25 18:04:27,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:04:27,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2014138269] [2022-11-25 18:04:27,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:27,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:27,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:04:27,273 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:04:27,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-25 18:04:27,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:04:27,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 18:04:27,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:27,508 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-25 18:04:27,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-25 18:04:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:04:27,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:04:27,557 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:04:27,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2014138269] [2022-11-25 18:04:27,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2014138269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:04:27,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:04:27,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:04:27,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168598233] [2022-11-25 18:04:27,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:04:27,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:04:27,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:04:27,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:04:27,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:04:27,841 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 617 [2022-11-25 18:04:27,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:27,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:04:27,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 617 [2022-11-25 18:04:27,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:04:28,553 INFO L130 PetriNetUnfolder]: 909/1493 cut-off events. [2022-11-25 18:04:28,554 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 18:04:28,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3008 conditions, 1493 events. 909/1493 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 7357 event pairs, 770 based on Foata normal form. 0/519 useless extension candidates. Maximal degree in co-relation 3002. Up to 749 conditions per place. [2022-11-25 18:04:28,564 INFO L137 encePairwiseOnDemand]: 611/617 looper letters, 69 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2022-11-25 18:04:28,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 73 transitions, 302 flow [2022-11-25 18:04:28,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:04:28,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:04:28,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 819 transitions. [2022-11-25 18:04:28,569 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44246353322528365 [2022-11-25 18:04:28,569 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 819 transitions. [2022-11-25 18:04:28,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 819 transitions. [2022-11-25 18:04:28,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:04:28,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 819 transitions. [2022-11-25 18:04:28,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 273.0) internal successors, (819), 3 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:28,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 617.0) internal successors, (2468), 4 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:28,580 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 617.0) internal successors, (2468), 4 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:28,580 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 82 flow. Second operand 3 states and 819 transitions. [2022-11-25 18:04:28,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 73 transitions, 302 flow [2022-11-25 18:04:28,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 73 transitions, 301 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:04:28,585 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 113 flow [2022-11-25 18:04:28,585 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2022-11-25 18:04:28,586 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -2 predicate places. [2022-11-25 18:04:28,586 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 113 flow [2022-11-25 18:04:28,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.66666666666666) internal successors, (746), 3 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:28,588 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:04:28,589 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:04:28,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:28,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:28,802 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:04:28,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:28,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1125948, now seen corresponding path program 1 times [2022-11-25 18:04:28,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:04:28,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839843033] [2022-11-25 18:04:28,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:28,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:28,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:04:28,809 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:04:28,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-25 18:04:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:04:28,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:04:28,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:04:28,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:04:28,919 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:04:28,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839843033] [2022-11-25 18:04:28,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839843033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:04:28,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:04:28,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:04:28,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710467821] [2022-11-25 18:04:28,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:04:28,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:04:28,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:04:28,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:04:28,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:04:29,018 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 617 [2022-11-25 18:04:29,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 113 flow. Second operand has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:29,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:04:29,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 617 [2022-11-25 18:04:29,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:04:29,459 INFO L130 PetriNetUnfolder]: 455/750 cut-off events. [2022-11-25 18:04:29,460 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 18:04:29,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1526 conditions, 750 events. 455/750 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 3182 event pairs, 385 based on Foata normal form. 2/266 useless extension candidates. Maximal degree in co-relation 1517. Up to 749 conditions per place. [2022-11-25 18:04:29,465 INFO L137 encePairwiseOnDemand]: 610/617 looper letters, 36 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2022-11-25 18:04:29,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 40 transitions, 189 flow [2022-11-25 18:04:29,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:04:29,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:04:29,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 800 transitions. [2022-11-25 18:04:29,470 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4321988114532685 [2022-11-25 18:04:29,470 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 800 transitions. [2022-11-25 18:04:29,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 800 transitions. [2022-11-25 18:04:29,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:04:29,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 800 transitions. [2022-11-25 18:04:29,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:29,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 617.0) internal successors, (2468), 4 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:29,481 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 617.0) internal successors, (2468), 4 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:29,481 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 113 flow. Second operand 3 states and 800 transitions. [2022-11-25 18:04:29,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 40 transitions, 189 flow [2022-11-25 18:04:29,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 181 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:04:29,484 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 119 flow [2022-11-25 18:04:29,484 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2022-11-25 18:04:29,485 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -1 predicate places. [2022-11-25 18:04:29,485 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 119 flow [2022-11-25 18:04:29,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.0) internal successors, (759), 3 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:29,486 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:04:29,487 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:04:29,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:29,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:29,713 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:04:29,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:29,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1123289, now seen corresponding path program 1 times [2022-11-25 18:04:29,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:04:29,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936899033] [2022-11-25 18:04:29,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:29,715 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:29,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:04:29,719 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:04:29,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-25 18:04:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:04:29,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:04:29,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:29,899 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-25 18:04:29,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-25 18:04:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:04:29,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:04:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:04:30,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:04:30,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936899033] [2022-11-25 18:04:30,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936899033] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:04:30,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:04:30,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 18:04:30,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269753926] [2022-11-25 18:04:30,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:04:30,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:04:30,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:04:30,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:04:30,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:04:31,748 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 617 [2022-11-25 18:04:31,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:31,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:04:31,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 617 [2022-11-25 18:04:31,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:04:34,762 INFO L130 PetriNetUnfolder]: 1817/2985 cut-off events. [2022-11-25 18:04:34,763 INFO L131 PetriNetUnfolder]: For 27/27 co-relation queries the response was YES. [2022-11-25 18:04:34,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6050 conditions, 2985 events. 1817/2985 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 16510 event pairs, 1540 based on Foata normal form. 0/1047 useless extension candidates. Maximal degree in co-relation 6040. Up to 749 conditions per place. [2022-11-25 18:04:34,784 INFO L137 encePairwiseOnDemand]: 611/617 looper letters, 132 selfloop transitions, 13 changer transitions 0/145 dead transitions. [2022-11-25 18:04:34,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 145 transitions, 676 flow [2022-11-25 18:04:34,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:04:34,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:04:34,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1615 transitions. [2022-11-25 18:04:34,792 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4362506753106429 [2022-11-25 18:04:34,792 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1615 transitions. [2022-11-25 18:04:34,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1615 transitions. [2022-11-25 18:04:34,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:04:34,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1615 transitions. [2022-11-25 18:04:34,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 269.1666666666667) internal successors, (1615), 6 states have internal predecessors, (1615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:34,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 617.0) internal successors, (4319), 7 states have internal predecessors, (4319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:34,808 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 617.0) internal successors, (4319), 7 states have internal predecessors, (4319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:34,809 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 119 flow. Second operand 6 states and 1615 transitions. [2022-11-25 18:04:34,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 145 transitions, 676 flow [2022-11-25 18:04:34,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 145 transitions, 662 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:04:34,813 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 207 flow [2022-11-25 18:04:34,813 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2022-11-25 18:04:34,814 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2022-11-25 18:04:34,814 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 207 flow [2022-11-25 18:04:34,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:34,816 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:04:34,816 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:04:34,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:35,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:35,029 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:04:35,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:35,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1079733252, now seen corresponding path program 1 times [2022-11-25 18:04:35,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:04:35,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588843699] [2022-11-25 18:04:35,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:35,031 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:35,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:04:35,033 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:04:35,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-25 18:04:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:04:35,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 18:04:35,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:04:35,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:04:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:04:35,260 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:04:35,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588843699] [2022-11-25 18:04:35,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1588843699] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:04:35,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:04:35,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-25 18:04:35,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394817415] [2022-11-25 18:04:35,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:04:35,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:04:35,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:04:35,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:04:35,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:04:35,702 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 617 [2022-11-25 18:04:35,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 207 flow. Second operand has 6 states, 6 states have (on average 249.33333333333334) internal successors, (1496), 6 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:35,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:04:35,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 617 [2022-11-25 18:04:35,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:04:36,318 INFO L130 PetriNetUnfolder]: 455/756 cut-off events. [2022-11-25 18:04:36,318 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-25 18:04:36,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1573 conditions, 756 events. 455/756 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 3187 event pairs, 385 based on Foata normal form. 6/278 useless extension candidates. Maximal degree in co-relation 1560. Up to 747 conditions per place. [2022-11-25 18:04:36,323 INFO L137 encePairwiseOnDemand]: 608/617 looper letters, 34 selfloop transitions, 12 changer transitions 0/46 dead transitions. [2022-11-25 18:04:36,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 275 flow [2022-11-25 18:04:36,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:04:36,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:04:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1546 transitions. [2022-11-25 18:04:36,329 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4176121015667207 [2022-11-25 18:04:36,330 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1546 transitions. [2022-11-25 18:04:36,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1546 transitions. [2022-11-25 18:04:36,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:04:36,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1546 transitions. [2022-11-25 18:04:36,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 257.6666666666667) internal successors, (1546), 6 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:36,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 617.0) internal successors, (4319), 7 states have internal predecessors, (4319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:36,344 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 617.0) internal successors, (4319), 7 states have internal predecessors, (4319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:36,344 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 207 flow. Second operand 6 states and 1546 transitions. [2022-11-25 18:04:36,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 275 flow [2022-11-25 18:04:36,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 46 transitions, 259 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 18:04:36,347 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 223 flow [2022-11-25 18:04:36,348 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2022-11-25 18:04:36,349 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2022-11-25 18:04:36,349 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 223 flow [2022-11-25 18:04:36,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 249.33333333333334) internal successors, (1496), 6 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:36,350 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:04:36,350 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 18:04:36,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:36,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:36,563 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:04:36,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:36,564 INFO L85 PathProgramCache]: Analyzing trace with hash -890352423, now seen corresponding path program 2 times [2022-11-25 18:04:36,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:04:36,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345005758] [2022-11-25 18:04:36,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:04:36,565 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:36,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:04:36,567 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:04:36,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-25 18:04:36,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:04:36,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:04:36,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 18:04:36,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:36,756 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-25 18:04:36,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-25 18:04:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:04:36,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:04:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:04:37,554 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:04:37,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345005758] [2022-11-25 18:04:37,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345005758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:04:37,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:04:37,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 18:04:37,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493100637] [2022-11-25 18:04:37,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:04:37,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:04:37,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:04:37,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:04:37,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:04:43,146 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 617 [2022-11-25 18:04:43,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 223 flow. Second operand has 12 states, 12 states have (on average 245.0) internal successors, (2940), 12 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:43,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:04:43,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 617 [2022-11-25 18:04:43,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:04:44,378 INFO L130 PetriNetUnfolder]: 909/1501 cut-off events. [2022-11-25 18:04:44,378 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2022-11-25 18:04:44,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3113 conditions, 1501 events. 909/1501 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 7348 event pairs, 770 based on Foata normal form. 2/535 useless extension candidates. Maximal degree in co-relation 3096. Up to 749 conditions per place. [2022-11-25 18:04:44,390 INFO L137 encePairwiseOnDemand]: 611/617 looper letters, 68 selfloop transitions, 13 changer transitions 0/81 dead transitions. [2022-11-25 18:04:44,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 81 transitions, 497 flow [2022-11-25 18:04:44,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:04:44,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:04:44,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1791 transitions. [2022-11-25 18:04:44,398 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4146793239175735 [2022-11-25 18:04:44,398 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1791 transitions. [2022-11-25 18:04:44,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1791 transitions. [2022-11-25 18:04:44,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:04:44,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1791 transitions. [2022-11-25 18:04:44,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 255.85714285714286) internal successors, (1791), 7 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:44,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 617.0) internal successors, (4936), 8 states have internal predecessors, (4936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:44,414 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 617.0) internal successors, (4936), 8 states have internal predecessors, (4936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:44,414 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 223 flow. Second operand 7 states and 1791 transitions. [2022-11-25 18:04:44,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 81 transitions, 497 flow [2022-11-25 18:04:44,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 81 transitions, 454 flow, removed 6 selfloop flow, removed 7 redundant places. [2022-11-25 18:04:44,418 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 239 flow [2022-11-25 18:04:44,419 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=239, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2022-11-25 18:04:44,420 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2022-11-25 18:04:44,420 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 239 flow [2022-11-25 18:04:44,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 245.0) internal successors, (2940), 12 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:44,422 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:04:44,422 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 1, 1] [2022-11-25 18:04:44,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:44,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:44,647 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:04:44,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:44,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1831115815, now seen corresponding path program 3 times [2022-11-25 18:04:44,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:04:44,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [769067931] [2022-11-25 18:04:44,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:04:44,649 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:44,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:04:44,651 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:04:44,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-25 18:04:44,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 18:04:44,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:04:44,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:04:44,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:44,959 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:04:44,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:04:45,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:04:45,349 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:04:45,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [769067931] [2022-11-25 18:04:45,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [769067931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:04:45,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:04:45,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-25 18:04:45,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602558500] [2022-11-25 18:04:45,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:04:45,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:04:45,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:04:45,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:04:45,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:04:47,371 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 617 [2022-11-25 18:04:47,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 239 flow. Second operand has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:47,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:04:47,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 617 [2022-11-25 18:04:47,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:04:48,079 INFO L130 PetriNetUnfolder]: 453/754 cut-off events. [2022-11-25 18:04:48,079 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 18:04:48,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1581 conditions, 754 events. 453/754 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 3178 event pairs, 385 based on Foata normal form. 6/276 useless extension candidates. Maximal degree in co-relation 1565. Up to 744 conditions per place. [2022-11-25 18:04:48,087 INFO L137 encePairwiseOnDemand]: 608/617 looper letters, 32 selfloop transitions, 12 changer transitions 0/44 dead transitions. [2022-11-25 18:04:48,087 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 44 transitions, 285 flow [2022-11-25 18:04:48,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:04:48,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:04:48,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2036 transitions. [2022-11-25 18:04:48,094 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41247974068071314 [2022-11-25 18:04:48,095 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2036 transitions. [2022-11-25 18:04:48,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2036 transitions. [2022-11-25 18:04:48,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:04:48,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2036 transitions. [2022-11-25 18:04:48,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 254.5) internal successors, (2036), 8 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:48,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 617.0) internal successors, (5553), 9 states have internal predecessors, (5553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:48,112 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 617.0) internal successors, (5553), 9 states have internal predecessors, (5553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:48,112 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 239 flow. Second operand 8 states and 2036 transitions. [2022-11-25 18:04:48,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 44 transitions, 285 flow [2022-11-25 18:04:48,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 44 transitions, 245 flow, removed 4 selfloop flow, removed 8 redundant places. [2022-11-25 18:04:48,115 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 191 flow [2022-11-25 18:04:48,116 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=191, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2022-11-25 18:04:48,116 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2022-11-25 18:04:48,117 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 191 flow [2022-11-25 18:04:48,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:48,118 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:04:48,119 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1] [2022-11-25 18:04:48,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:48,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:48,332 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:04:48,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:48,333 INFO L85 PathProgramCache]: Analyzing trace with hash -317130237, now seen corresponding path program 1 times [2022-11-25 18:04:48,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:04:48,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1885257740] [2022-11-25 18:04:48,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:48,334 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 [2022-11-25 18:04:48,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:04:48,335 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:04:48,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-25 18:04:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:04:48,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:04:48,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:48,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:04:48,689 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-25 18:04:48,690 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 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-25 18:04:48,876 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 18:04:48,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 18:04:48,974 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:04:48,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:04:48,975 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:04:48,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1885257740] [2022-11-25 18:04:48,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1885257740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:04:48,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:04:48,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:04:48,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927678488] [2022-11-25 18:04:48,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:04:48,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:04:48,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:04:48,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:04:48,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:04:49,238 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 617 [2022-11-25 18:04:49,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 191 flow. Second operand has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:49,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:04:49,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 617 [2022-11-25 18:04:49,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:04:49,586 INFO L130 PetriNetUnfolder]: 341/585 cut-off events. [2022-11-25 18:04:49,586 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 18:04:49,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 585 events. 341/585 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 2344 event pairs, 288 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 1219. Up to 585 conditions per place. [2022-11-25 18:04:49,591 INFO L137 encePairwiseOnDemand]: 614/617 looper letters, 41 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2022-11-25 18:04:49,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 42 transitions, 261 flow [2022-11-25 18:04:49,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:04:49,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:04:49,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 795 transitions. [2022-11-25 18:04:49,595 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42949756888168555 [2022-11-25 18:04:49,595 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 795 transitions. [2022-11-25 18:04:49,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 795 transitions. [2022-11-25 18:04:49,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:04:49,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 795 transitions. [2022-11-25 18:04:49,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:49,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 617.0) internal successors, (2468), 4 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:49,603 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 617.0) internal successors, (2468), 4 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:49,603 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 191 flow. Second operand 3 states and 795 transitions. [2022-11-25 18:04:49,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 42 transitions, 261 flow [2022-11-25 18:04:49,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 236 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-25 18:04:49,606 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 154 flow [2022-11-25 18:04:49,606 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2022-11-25 18:04:49,607 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2022-11-25 18:04:49,607 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 154 flow [2022-11-25 18:04:49,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:49,608 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:04:49,608 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1] [2022-11-25 18:04:49,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:49,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:49,825 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:04:49,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:49,825 INFO L85 PathProgramCache]: Analyzing trace with hash -317130236, now seen corresponding path program 2 times [2022-11-25 18:04:49,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:04:49,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145693098] [2022-11-25 18:04:49,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:04:49,826 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:49,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:04:49,827 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:04:49,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-25 18:04:49,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:04:49,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:04:49,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:04:49,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:49,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:04:49,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:04:50,012 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 18:04:50,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-25 18:04:50,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-25 18:04:50,206 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 18:04:50,207 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 18 [2022-11-25 18:04:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:04:50,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:04:50,421 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:04:50,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145693098] [2022-11-25 18:04:50,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145693098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:04:50,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:04:50,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:04:50,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014470806] [2022-11-25 18:04:50,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:04:50,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:04:50,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:04:50,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:04:50,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:04:51,040 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 617 [2022-11-25 18:04:51,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 253.25) internal successors, (1013), 4 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) [2022-11-25 18:04:51,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:04:51,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 617 [2022-11-25 18:04:51,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:04:51,485 INFO L130 PetriNetUnfolder]: 229/416 cut-off events. [2022-11-25 18:04:51,485 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 18:04:51,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 878 conditions, 416 events. 229/416 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1581 event pairs, 191 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 865. Up to 410 conditions per place. [2022-11-25 18:04:51,488 INFO L137 encePairwiseOnDemand]: 613/617 looper letters, 38 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2022-11-25 18:04:51,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 40 transitions, 220 flow [2022-11-25 18:04:51,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:04:51,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:04:51,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1042 transitions. [2022-11-25 18:04:51,493 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4222042139384117 [2022-11-25 18:04:51,493 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1042 transitions. [2022-11-25 18:04:51,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1042 transitions. [2022-11-25 18:04:51,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:04:51,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1042 transitions. [2022-11-25 18:04:51,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 260.5) internal successors, (1042), 4 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:51,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 617.0) internal successors, (3085), 5 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:51,503 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 617.0) internal successors, (3085), 5 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:51,503 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 154 flow. Second operand 4 states and 1042 transitions. [2022-11-25 18:04:51,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 40 transitions, 220 flow [2022-11-25 18:04:51,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 40 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:04:51,505 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 143 flow [2022-11-25 18:04:51,505 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2022-11-25 18:04:51,506 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2022-11-25 18:04:51,506 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 143 flow [2022-11-25 18:04:51,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 253.25) internal successors, (1013), 4 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) [2022-11-25 18:04:51,507 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:04:51,507 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2022-11-25 18:04:51,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:51,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:51,721 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:04:51,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:51,721 INFO L85 PathProgramCache]: Analyzing trace with hash 180544158, now seen corresponding path program 1 times [2022-11-25 18:04:51,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:04:51,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260967938] [2022-11-25 18:04:51,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:51,723 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:51,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:04:51,724 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:04:51,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-25 18:04:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:04:52,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:04:52,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:52,094 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-25 18:04:52,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-25 18:04:52,151 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 18:04:52,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-25 18:04:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:04:52,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:04:52,183 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:04:52,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260967938] [2022-11-25 18:04:52,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260967938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:04:52,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:04:52,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:04:52,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146817375] [2022-11-25 18:04:52,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:04:52,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:04:52,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:04:52,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:04:52,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:04:52,345 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 617 [2022-11-25 18:04:52,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 253.33333333333334) internal successors, (760), 3 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:52,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:04:52,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 617 [2022-11-25 18:04:52,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:04:52,597 INFO L130 PetriNetUnfolder]: 214/386 cut-off events. [2022-11-25 18:04:52,597 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-25 18:04:52,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 820 conditions, 386 events. 214/386 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1426 event pairs, 178 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 806. Up to 386 conditions per place. [2022-11-25 18:04:52,600 INFO L137 encePairwiseOnDemand]: 614/617 looper letters, 37 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2022-11-25 18:04:52,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 38 transitions, 215 flow [2022-11-25 18:04:52,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:04:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:04:52,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 785 transitions. [2022-11-25 18:04:52,604 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42409508373851973 [2022-11-25 18:04:52,604 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 785 transitions. [2022-11-25 18:04:52,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 785 transitions. [2022-11-25 18:04:52,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:04:52,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 785 transitions. [2022-11-25 18:04:52,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:52,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 617.0) internal successors, (2468), 4 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:52,611 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 617.0) internal successors, (2468), 4 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:52,611 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 143 flow. Second operand 3 states and 785 transitions. [2022-11-25 18:04:52,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 38 transitions, 215 flow [2022-11-25 18:04:52,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 38 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:04:52,613 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 138 flow [2022-11-25 18:04:52,613 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2022-11-25 18:04:52,614 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2022-11-25 18:04:52,614 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 138 flow [2022-11-25 18:04:52,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.33333333333334) internal successors, (760), 3 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:52,615 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:04:52,615 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2022-11-25 18:04:52,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:52,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:52,828 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:04:52,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:52,828 INFO L85 PathProgramCache]: Analyzing trace with hash 180544156, now seen corresponding path program 1 times [2022-11-25 18:04:52,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:04:52,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157347682] [2022-11-25 18:04:52,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:52,829 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:52,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:04:52,831 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:04:52,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-25 18:04:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:04:53,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 18:04:53,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:53,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:04:53,220 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-25 18:04:53,220 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-25 18:04:53,247 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 39 treesize of output 37 [2022-11-25 18:04:53,334 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 18:04:53,334 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 [2022-11-25 18:04:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:04:53,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:04:53,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:04:53,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157347682] [2022-11-25 18:04:53,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157347682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:04:53,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:04:53,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:04:53,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672636757] [2022-11-25 18:04:53,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:04:53,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:04:53,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:04:53,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:04:53,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:04:53,883 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 617 [2022-11-25 18:04:53,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 253.75) internal successors, (1015), 4 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:53,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:04:53,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 617 [2022-11-25 18:04:53,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:04:54,202 INFO L130 PetriNetUnfolder]: 199/356 cut-off events. [2022-11-25 18:04:54,203 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 18:04:54,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 356 events. 199/356 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1289 event pairs, 165 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 746. Up to 350 conditions per place. [2022-11-25 18:04:54,205 INFO L137 encePairwiseOnDemand]: 613/617 looper letters, 34 selfloop transitions, 2 changer transitions 0/36 dead transitions. [2022-11-25 18:04:54,206 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 36 transitions, 206 flow [2022-11-25 18:04:54,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:04:54,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:04:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1038 transitions. [2022-11-25 18:04:54,210 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4205834683954619 [2022-11-25 18:04:54,210 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1038 transitions. [2022-11-25 18:04:54,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1038 transitions. [2022-11-25 18:04:54,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:04:54,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1038 transitions. [2022-11-25 18:04:54,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 259.5) internal successors, (1038), 4 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:54,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 617.0) internal successors, (3085), 5 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:54,219 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 617.0) internal successors, (3085), 5 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:54,219 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 138 flow. Second operand 4 states and 1038 transitions. [2022-11-25 18:04:54,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 36 transitions, 206 flow [2022-11-25 18:04:54,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 36 transitions, 205 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:04:54,221 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 137 flow [2022-11-25 18:04:54,221 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2022-11-25 18:04:54,222 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2022-11-25 18:04:54,222 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 137 flow [2022-11-25 18:04:54,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 253.75) internal successors, (1015), 4 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:54,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:04:54,223 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2022-11-25 18:04:54,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:54,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:54,436 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:04:54,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:54,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1301904059, now seen corresponding path program 1 times [2022-11-25 18:04:54,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:04:54,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [773150260] [2022-11-25 18:04:54,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:54,437 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 [2022-11-25 18:04:54,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:04:54,439 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:04:54,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-25 18:04:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:04:54,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 18:04:54,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:54,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:04:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:04:54,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:04:54,826 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:04:54,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [773150260] [2022-11-25 18:04:54,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [773150260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:04:54,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:04:54,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:04:54,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900256105] [2022-11-25 18:04:54,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:04:54,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:04:54,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:04:54,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:04:54,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:04:55,401 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 617 [2022-11-25 18:04:55,403 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 137 flow. Second operand has 5 states, 5 states have (on average 248.6) internal successors, (1243), 5 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:55,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:04:55,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 617 [2022-11-25 18:04:55,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:04:55,866 INFO L130 PetriNetUnfolder]: 351/620 cut-off events. [2022-11-25 18:04:55,866 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 18:04:55,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1296 conditions, 620 events. 351/620 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 2914 event pairs, 165 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 1281. Up to 344 conditions per place. [2022-11-25 18:04:55,868 INFO L137 encePairwiseOnDemand]: 612/617 looper letters, 52 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2022-11-25 18:04:55,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 56 transitions, 292 flow [2022-11-25 18:04:55,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:04:55,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:04:55,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1284 transitions. [2022-11-25 18:04:55,874 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41620745542949755 [2022-11-25 18:04:55,874 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1284 transitions. [2022-11-25 18:04:55,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1284 transitions. [2022-11-25 18:04:55,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:04:55,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1284 transitions. [2022-11-25 18:04:55,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 256.8) internal successors, (1284), 5 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:55,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 617.0) internal successors, (3702), 6 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:55,882 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 617.0) internal successors, (3702), 6 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:55,882 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 137 flow. Second operand 5 states and 1284 transitions. [2022-11-25 18:04:55,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 56 transitions, 292 flow [2022-11-25 18:04:55,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 56 transitions, 289 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:04:55,884 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 150 flow [2022-11-25 18:04:55,885 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=150, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2022-11-25 18:04:55,885 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2022-11-25 18:04:55,886 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 150 flow [2022-11-25 18:04:55,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 248.6) internal successors, (1243), 5 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:55,886 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:04:55,887 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2022-11-25 18:04:55,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:56,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:56,100 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:04:56,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:56,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1301904058, now seen corresponding path program 1 times [2022-11-25 18:04:56,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:04:56,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514135969] [2022-11-25 18:04:56,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:56,101 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:56,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:04:56,103 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:04:56,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-25 18:04:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:04:56,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 18:04:56,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:56,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-25 18:04:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:04:56,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:04:56,428 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:04:56,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514135969] [2022-11-25 18:04:56,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514135969] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:04:56,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:04:56,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:04:56,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431793938] [2022-11-25 18:04:56,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:04:56,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:04:56,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:04:56,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:04:56,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:04:56,689 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 617 [2022-11-25 18:04:56,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:56,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:04:56,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 617 [2022-11-25 18:04:56,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:04:56,965 INFO L130 PetriNetUnfolder]: 265/474 cut-off events. [2022-11-25 18:04:56,965 INFO L131 PetriNetUnfolder]: For 86/86 co-relation queries the response was YES. [2022-11-25 18:04:56,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1074 conditions, 474 events. 265/474 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 1892 event pairs, 223 based on Foata normal form. 0/278 useless extension candidates. Maximal degree in co-relation 1058. Up to 462 conditions per place. [2022-11-25 18:04:56,969 INFO L137 encePairwiseOnDemand]: 613/617 looper letters, 33 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2022-11-25 18:04:56,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 35 transitions, 216 flow [2022-11-25 18:04:56,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:04:56,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:04:56,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1004 transitions. [2022-11-25 18:04:56,978 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.406807131280389 [2022-11-25 18:04:56,978 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1004 transitions. [2022-11-25 18:04:56,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1004 transitions. [2022-11-25 18:04:56,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:04:56,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1004 transitions. [2022-11-25 18:04:56,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 251.0) internal successors, (1004), 4 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:56,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 617.0) internal successors, (3085), 5 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:56,986 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 617.0) internal successors, (3085), 5 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:56,986 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 150 flow. Second operand 4 states and 1004 transitions. [2022-11-25 18:04:56,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 35 transitions, 216 flow [2022-11-25 18:04:56,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 35 transitions, 210 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 18:04:56,988 INFO L231 Difference]: Finished difference. Result has 46 places, 35 transitions, 144 flow [2022-11-25 18:04:56,988 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=46, PETRI_TRANSITIONS=35} [2022-11-25 18:04:56,989 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2022-11-25 18:04:56,989 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 35 transitions, 144 flow [2022-11-25 18:04:56,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:56,990 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:04:56,990 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2022-11-25 18:04:57,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:57,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:57,204 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:04:57,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:57,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1301904011, now seen corresponding path program 1 times [2022-11-25 18:04:57,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:04:57,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851260096] [2022-11-25 18:04:57,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:57,205 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:57,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:04:57,206 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:04:57,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-25 18:04:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:04:57,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:04:57,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:57,651 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 18:04:57,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 18:04:57,705 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-25 18:04:57,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-25 18:04:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:04:57,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:04:57,740 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:04:57,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851260096] [2022-11-25 18:04:57,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851260096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:04:57,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:04:57,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:04:57,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615189699] [2022-11-25 18:04:57,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:04:57,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:04:57,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:04:57,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:04:57,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:04:58,092 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 617 [2022-11-25 18:04:58,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 35 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:58,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:04:58,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 617 [2022-11-25 18:04:58,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:04:58,322 INFO L130 PetriNetUnfolder]: 191/348 cut-off events. [2022-11-25 18:04:58,322 INFO L131 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2022-11-25 18:04:58,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 348 events. 191/348 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1237 event pairs, 155 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 782. Up to 342 conditions per place. [2022-11-25 18:04:58,325 INFO L137 encePairwiseOnDemand]: 613/617 looper letters, 31 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2022-11-25 18:04:58,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 33 transitions, 206 flow [2022-11-25 18:04:58,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:04:58,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:04:58,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1002 transitions. [2022-11-25 18:04:58,335 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4059967585089141 [2022-11-25 18:04:58,335 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1002 transitions. [2022-11-25 18:04:58,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1002 transitions. [2022-11-25 18:04:58,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:04:58,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1002 transitions. [2022-11-25 18:04:58,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 250.5) internal successors, (1002), 4 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:58,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 617.0) internal successors, (3085), 5 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:58,343 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 617.0) internal successors, (3085), 5 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:58,343 INFO L175 Difference]: Start difference. First operand has 46 places, 35 transitions, 144 flow. Second operand 4 states and 1002 transitions. [2022-11-25 18:04:58,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 33 transitions, 206 flow [2022-11-25 18:04:58,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 33 transitions, 203 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:04:58,345 INFO L231 Difference]: Finished difference. Result has 45 places, 33 transitions, 141 flow [2022-11-25 18:04:58,345 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=45, PETRI_TRANSITIONS=33} [2022-11-25 18:04:58,350 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2022-11-25 18:04:58,350 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 33 transitions, 141 flow [2022-11-25 18:04:58,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:58,351 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:04:58,351 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2022-11-25 18:04:58,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-25 18:04:58,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:58,564 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:04:58,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:04:58,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1301904010, now seen corresponding path program 1 times [2022-11-25 18:04:58,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:04:58,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491497691] [2022-11-25 18:04:58,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:04:58,565 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:04:58,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:04:58,566 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:04:58,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-25 18:04:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:04:58,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:04:58,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:04:58,930 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-25 18:04:58,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-25 18:04:59,005 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 18:04:59,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 18:04:59,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:04:59,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:04:59,135 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:04:59,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 18:04:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:04:59,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:04:59,222 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:04:59,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491497691] [2022-11-25 18:04:59,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491497691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:04:59,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:04:59,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:04:59,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211485537] [2022-11-25 18:04:59,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:04:59,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:04:59,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:04:59,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:04:59,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:04:59,868 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 617 [2022-11-25 18:04:59,869 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 33 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 244.6) internal successors, (1223), 5 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:04:59,869 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:04:59,869 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 617 [2022-11-25 18:04:59,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:05:00,236 INFO L130 PetriNetUnfolder]: 174/319 cut-off events. [2022-11-25 18:05:00,236 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-11-25 18:05:00,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 740 conditions, 319 events. 174/319 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1161 event pairs, 87 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 724. Up to 204 conditions per place. [2022-11-25 18:05:00,238 INFO L137 encePairwiseOnDemand]: 612/617 looper letters, 43 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2022-11-25 18:05:00,239 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 266 flow [2022-11-25 18:05:00,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:05:00,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:05:00,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1255 transitions. [2022-11-25 18:05:00,242 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.406807131280389 [2022-11-25 18:05:00,242 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1255 transitions. [2022-11-25 18:05:00,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1255 transitions. [2022-11-25 18:05:00,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:05:00,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1255 transitions. [2022-11-25 18:05:00,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 251.0) internal successors, (1255), 5 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:00,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 617.0) internal successors, (3702), 6 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:00,250 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 617.0) internal successors, (3702), 6 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:00,250 INFO L175 Difference]: Start difference. First operand has 45 places, 33 transitions, 141 flow. Second operand 5 states and 1255 transitions. [2022-11-25 18:05:00,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 266 flow [2022-11-25 18:05:00,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 263 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:05:00,252 INFO L231 Difference]: Finished difference. Result has 48 places, 33 transitions, 150 flow [2022-11-25 18:05:00,252 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=150, PETRI_PLACES=48, PETRI_TRANSITIONS=33} [2022-11-25 18:05:00,253 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2022-11-25 18:05:00,253 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 33 transitions, 150 flow [2022-11-25 18:05:00,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 244.6) internal successors, (1223), 5 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:00,253 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:05:00,253 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:05:00,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-25 18:05:00,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:00,454 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:05:00,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:05:00,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1292697771, now seen corresponding path program 1 times [2022-11-25 18:05:00,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:05:00,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292409968] [2022-11-25 18:05:00,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:05:00,455 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:00,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:05:00,456 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:05:00,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-25 18:05:00,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:05:00,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:05:00,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:05:00,897 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 18:05:00,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 18:05:00,975 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-25 18:05:00,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-25 18:05:01,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:05:01,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:05:01,069 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:05:01,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 18:05:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:05:01,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:05:01,168 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:05:01,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292409968] [2022-11-25 18:05:01,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292409968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:05:01,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:05:01,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:05:01,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627182870] [2022-11-25 18:05:01,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:05:01,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:05:01,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:05:01,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:05:01,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:05:01,721 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 617 [2022-11-25 18:05:01,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 33 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:01,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:05:01,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 617 [2022-11-25 18:05:01,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:05:02,166 INFO L130 PetriNetUnfolder]: 267/482 cut-off events. [2022-11-25 18:05:02,166 INFO L131 PetriNetUnfolder]: For 209/209 co-relation queries the response was YES. [2022-11-25 18:05:02,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1164 conditions, 482 events. 267/482 cut-off events. For 209/209 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1929 event pairs, 140 based on Foata normal form. 0/336 useless extension candidates. Maximal degree in co-relation 1147. Up to 313 conditions per place. [2022-11-25 18:05:02,170 INFO L137 encePairwiseOnDemand]: 612/617 looper letters, 44 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2022-11-25 18:05:02,170 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 48 transitions, 294 flow [2022-11-25 18:05:02,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:05:02,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:05:02,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1254 transitions. [2022-11-25 18:05:02,174 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.406482982171799 [2022-11-25 18:05:02,175 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1254 transitions. [2022-11-25 18:05:02,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1254 transitions. [2022-11-25 18:05:02,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:05:02,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1254 transitions. [2022-11-25 18:05:02,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 250.8) internal successors, (1254), 5 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:02,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 617.0) internal successors, (3702), 6 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:02,184 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 617.0) internal successors, (3702), 6 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:02,184 INFO L175 Difference]: Start difference. First operand has 48 places, 33 transitions, 150 flow. Second operand 5 states and 1254 transitions. [2022-11-25 18:05:02,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 48 transitions, 294 flow [2022-11-25 18:05:02,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 282 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:05:02,186 INFO L231 Difference]: Finished difference. Result has 49 places, 34 transitions, 158 flow [2022-11-25 18:05:02,187 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=158, PETRI_PLACES=49, PETRI_TRANSITIONS=34} [2022-11-25 18:05:02,187 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2022-11-25 18:05:02,187 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 34 transitions, 158 flow [2022-11-25 18:05:02,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:02,188 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:05:02,188 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:05:02,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-25 18:05:02,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:02,404 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:05:02,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:05:02,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1292697722, now seen corresponding path program 1 times [2022-11-25 18:05:02,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:05:02,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777788394] [2022-11-25 18:05:02,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:05:02,406 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:02,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:05:02,408 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:05:02,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-25 18:05:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:05:02,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 18:05:02,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:05:02,752 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 [2022-11-25 18:05:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:05:02,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:05:02,860 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:05:02,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777788394] [2022-11-25 18:05:02,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777788394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:05:02,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:05:02,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:05:02,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426957682] [2022-11-25 18:05:02,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:05:02,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:05:02,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:05:02,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:05:02,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:05:03,386 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 617 [2022-11-25 18:05:03,388 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 34 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:03,388 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:05:03,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 617 [2022-11-25 18:05:03,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:05:03,807 INFO L130 PetriNetUnfolder]: 236/429 cut-off events. [2022-11-25 18:05:03,807 INFO L131 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2022-11-25 18:05:03,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1121 conditions, 429 events. 236/429 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1678 event pairs, 140 based on Foata normal form. 0/353 useless extension candidates. Maximal degree in co-relation 1103. Up to 307 conditions per place. [2022-11-25 18:05:03,809 INFO L137 encePairwiseOnDemand]: 612/617 looper letters, 43 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2022-11-25 18:05:03,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 292 flow [2022-11-25 18:05:03,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:05:03,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:05:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1273 transitions. [2022-11-25 18:05:03,815 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4126418152350081 [2022-11-25 18:05:03,815 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1273 transitions. [2022-11-25 18:05:03,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1273 transitions. [2022-11-25 18:05:03,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:05:03,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1273 transitions. [2022-11-25 18:05:03,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 254.6) internal successors, (1273), 5 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:03,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 617.0) internal successors, (3702), 6 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:03,822 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 617.0) internal successors, (3702), 6 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:03,822 INFO L175 Difference]: Start difference. First operand has 49 places, 34 transitions, 158 flow. Second operand 5 states and 1273 transitions. [2022-11-25 18:05:03,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 292 flow [2022-11-25 18:05:03,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 47 transitions, 286 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 18:05:03,825 INFO L231 Difference]: Finished difference. Result has 51 places, 34 transitions, 164 flow [2022-11-25 18:05:03,825 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=51, PETRI_TRANSITIONS=34} [2022-11-25 18:05:03,825 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2022-11-25 18:05:03,826 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 34 transitions, 164 flow [2022-11-25 18:05:03,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:03,826 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:05:03,826 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:05:03,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-25 18:05:04,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:04,040 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:05:04,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:05:04,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1294350692, now seen corresponding path program 1 times [2022-11-25 18:05:04,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:05:04,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135205188] [2022-11-25 18:05:04,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:05:04,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:04,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:05:04,042 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:05:04,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-25 18:05:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:05:04,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:05:04,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:05:04,469 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-25 18:05:04,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-25 18:05:04,544 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 18:05:04,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 18:05:04,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:05:04,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:05:04,656 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:05:04,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 18:05:04,765 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:05:04,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:05:07,150 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:05:07,150 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:05:07,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135205188] [2022-11-25 18:05:07,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135205188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:05:07,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:05:07,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 18:05:07,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575189220] [2022-11-25 18:05:07,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:05:07,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:05:07,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:05:07,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:05:07,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:05:10,611 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 617 [2022-11-25 18:05:10,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 34 transitions, 164 flow. Second operand has 10 states, 10 states have (on average 244.0) internal successors, (2440), 10 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:10,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:05:10,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 617 [2022-11-25 18:05:10,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:05:11,851 INFO L130 PetriNetUnfolder]: 524/931 cut-off events. [2022-11-25 18:05:11,851 INFO L131 PetriNetUnfolder]: For 586/586 co-relation queries the response was YES. [2022-11-25 18:05:11,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2490 conditions, 931 events. 524/931 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4113 event pairs, 81 based on Foata normal form. 48/851 useless extension candidates. Maximal degree in co-relation 2471. Up to 220 conditions per place. [2022-11-25 18:05:11,857 INFO L137 encePairwiseOnDemand]: 610/617 looper letters, 90 selfloop transitions, 9 changer transitions 0/99 dead transitions. [2022-11-25 18:05:11,857 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 99 transitions, 578 flow [2022-11-25 18:05:11,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:05:11,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:05:11,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2025 transitions. [2022-11-25 18:05:11,862 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4102512155591572 [2022-11-25 18:05:11,862 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2025 transitions. [2022-11-25 18:05:11,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2025 transitions. [2022-11-25 18:05:11,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:05:11,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2025 transitions. [2022-11-25 18:05:11,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 253.125) internal successors, (2025), 8 states have internal predecessors, (2025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:11,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 617.0) internal successors, (5553), 9 states have internal predecessors, (5553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:11,872 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 617.0) internal successors, (5553), 9 states have internal predecessors, (5553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:11,872 INFO L175 Difference]: Start difference. First operand has 51 places, 34 transitions, 164 flow. Second operand 8 states and 2025 transitions. [2022-11-25 18:05:11,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 99 transitions, 578 flow [2022-11-25 18:05:11,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 99 transitions, 554 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:05:11,875 INFO L231 Difference]: Finished difference. Result has 58 places, 38 transitions, 211 flow [2022-11-25 18:05:11,876 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=211, PETRI_PLACES=58, PETRI_TRANSITIONS=38} [2022-11-25 18:05:11,876 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2022-11-25 18:05:11,876 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 38 transitions, 211 flow [2022-11-25 18:05:11,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 244.0) internal successors, (2440), 10 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:11,877 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:05:11,877 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:05:11,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-25 18:05:12,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:12,077 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:05:12,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:05:12,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1294350741, now seen corresponding path program 1 times [2022-11-25 18:05:12,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:05:12,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881150871] [2022-11-25 18:05:12,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:05:12,078 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:12,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:05:12,079 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:05:12,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-25 18:05:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:05:12,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:05:12,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:05:12,404 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 [2022-11-25 18:05:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:05:12,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:05:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:05:12,913 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:05:12,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881150871] [2022-11-25 18:05:12,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881150871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:05:12,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:05:12,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-25 18:05:12,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264616074] [2022-11-25 18:05:12,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:05:12,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:05:12,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:05:12,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:05:12,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:05:16,331 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 617 [2022-11-25 18:05:16,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 38 transitions, 211 flow. Second operand has 10 states, 10 states have (on average 247.8) internal successors, (2478), 10 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:16,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:05:16,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 617 [2022-11-25 18:05:16,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:05:17,457 INFO L130 PetriNetUnfolder]: 485/876 cut-off events. [2022-11-25 18:05:17,458 INFO L131 PetriNetUnfolder]: For 796/796 co-relation queries the response was YES. [2022-11-25 18:05:17,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2595 conditions, 876 events. 485/876 cut-off events. For 796/796 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3808 event pairs, 123 based on Foata normal form. 48/878 useless extension candidates. Maximal degree in co-relation 2572. Up to 268 conditions per place. [2022-11-25 18:05:17,465 INFO L137 encePairwiseOnDemand]: 612/617 looper letters, 90 selfloop transitions, 7 changer transitions 0/97 dead transitions. [2022-11-25 18:05:17,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 97 transitions, 591 flow [2022-11-25 18:05:17,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:05:17,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:05:17,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2055 transitions. [2022-11-25 18:05:17,471 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4163290113452188 [2022-11-25 18:05:17,472 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2055 transitions. [2022-11-25 18:05:17,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2055 transitions. [2022-11-25 18:05:17,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:05:17,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2055 transitions. [2022-11-25 18:05:17,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 256.875) internal successors, (2055), 8 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:17,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 617.0) internal successors, (5553), 9 states have internal predecessors, (5553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:17,484 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 617.0) internal successors, (5553), 9 states have internal predecessors, (5553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:17,484 INFO L175 Difference]: Start difference. First operand has 58 places, 38 transitions, 211 flow. Second operand 8 states and 2055 transitions. [2022-11-25 18:05:17,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 97 transitions, 591 flow [2022-11-25 18:05:17,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 97 transitions, 574 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-25 18:05:17,490 INFO L231 Difference]: Finished difference. Result has 62 places, 38 transitions, 214 flow [2022-11-25 18:05:17,490 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=214, PETRI_PLACES=62, PETRI_TRANSITIONS=38} [2022-11-25 18:05:17,490 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2022-11-25 18:05:17,491 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 38 transitions, 214 flow [2022-11-25 18:05:17,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 247.8) internal successors, (2478), 10 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:17,491 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:05:17,492 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:05:17,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-25 18:05:17,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:17,708 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:05:17,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:05:17,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1418931023, now seen corresponding path program 1 times [2022-11-25 18:05:17,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:05:17,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078397505] [2022-11-25 18:05:17,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:05:17,709 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:17,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:05:17,710 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:05:17,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-25 18:05:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:05:18,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 18:05:18,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:05:18,157 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-25 18:05:18,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-25 18:05:18,228 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 18:05:18,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 18:05:18,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:05:18,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:05:18,346 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:05:18,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 18:05:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:05:18,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:05:21,190 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:05:21,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:05:21,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078397505] [2022-11-25 18:05:21,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078397505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:05:21,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:05:21,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 18:05:21,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518968277] [2022-11-25 18:05:21,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:05:21,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:05:21,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:05:21,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:05:21,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:05:24,953 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 617 [2022-11-25 18:05:24,956 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 38 transitions, 214 flow. Second operand has 10 states, 10 states have (on average 244.2) internal successors, (2442), 10 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:24,956 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:05:24,956 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 617 [2022-11-25 18:05:24,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:05:26,312 INFO L130 PetriNetUnfolder]: 1061/1896 cut-off events. [2022-11-25 18:05:26,312 INFO L131 PetriNetUnfolder]: For 1938/1938 co-relation queries the response was YES. [2022-11-25 18:05:26,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5470 conditions, 1896 events. 1061/1896 cut-off events. For 1938/1938 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 10283 event pairs, 299 based on Foata normal form. 0/1816 useless extension candidates. Maximal degree in co-relation 5447. Up to 640 conditions per place. [2022-11-25 18:05:26,325 INFO L137 encePairwiseOnDemand]: 612/617 looper letters, 105 selfloop transitions, 7 changer transitions 0/112 dead transitions. [2022-11-25 18:05:26,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 112 transitions, 830 flow [2022-11-25 18:05:26,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:05:26,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:05:26,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2018 transitions. [2022-11-25 18:05:26,334 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4088330632090762 [2022-11-25 18:05:26,334 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2018 transitions. [2022-11-25 18:05:26,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2018 transitions. [2022-11-25 18:05:26,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:05:26,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2018 transitions. [2022-11-25 18:05:26,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 252.25) internal successors, (2018), 8 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:26,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 617.0) internal successors, (5553), 9 states have internal predecessors, (5553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:26,346 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 617.0) internal successors, (5553), 9 states have internal predecessors, (5553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:26,347 INFO L175 Difference]: Start difference. First operand has 62 places, 38 transitions, 214 flow. Second operand 8 states and 2018 transitions. [2022-11-25 18:05:26,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 112 transitions, 830 flow [2022-11-25 18:05:26,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 112 transitions, 786 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 18:05:26,352 INFO L231 Difference]: Finished difference. Result has 66 places, 41 transitions, 242 flow [2022-11-25 18:05:26,352 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=242, PETRI_PLACES=66, PETRI_TRANSITIONS=41} [2022-11-25 18:05:26,353 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2022-11-25 18:05:26,353 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 41 transitions, 242 flow [2022-11-25 18:05:26,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 244.2) internal successors, (2442), 10 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:26,354 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:05:26,354 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:05:26,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-25 18:05:26,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:26,568 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:05:26,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:05:26,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1418930974, now seen corresponding path program 1 times [2022-11-25 18:05:26,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:05:26,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897043469] [2022-11-25 18:05:26,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:05:26,569 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:26,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:05:26,570 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:05:26,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-25 18:05:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:05:26,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:05:26,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:05:26,904 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 [2022-11-25 18:05:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:05:27,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:05:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:05:27,449 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:05:27,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897043469] [2022-11-25 18:05:27,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897043469] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:05:27,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:05:27,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-25 18:05:27,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862463879] [2022-11-25 18:05:27,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:05:27,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:05:27,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:05:27,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:05:27,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:05:31,295 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 617 [2022-11-25 18:05:31,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 41 transitions, 242 flow. Second operand has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:31,296 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:05:31,296 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 617 [2022-11-25 18:05:31,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:05:32,532 INFO L130 PetriNetUnfolder]: 869/1566 cut-off events. [2022-11-25 18:05:32,532 INFO L131 PetriNetUnfolder]: For 1857/1857 co-relation queries the response was YES. [2022-11-25 18:05:32,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4929 conditions, 1566 events. 869/1566 cut-off events. For 1857/1857 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 8067 event pairs, 237 based on Foata normal form. 138/1676 useless extension candidates. Maximal degree in co-relation 4903. Up to 524 conditions per place. [2022-11-25 18:05:32,543 INFO L137 encePairwiseOnDemand]: 611/617 looper letters, 101 selfloop transitions, 8 changer transitions 0/109 dead transitions. [2022-11-25 18:05:32,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 109 transitions, 796 flow [2022-11-25 18:05:32,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:05:32,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:05:32,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2047 transitions. [2022-11-25 18:05:32,546 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41470826580226905 [2022-11-25 18:05:32,547 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2047 transitions. [2022-11-25 18:05:32,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2047 transitions. [2022-11-25 18:05:32,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:05:32,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2047 transitions. [2022-11-25 18:05:32,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 255.875) internal successors, (2047), 8 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:32,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 617.0) internal successors, (5553), 9 states have internal predecessors, (5553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:32,554 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 617.0) internal successors, (5553), 9 states have internal predecessors, (5553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:32,554 INFO L175 Difference]: Start difference. First operand has 66 places, 41 transitions, 242 flow. Second operand 8 states and 2047 transitions. [2022-11-25 18:05:32,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 109 transitions, 796 flow [2022-11-25 18:05:32,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 109 transitions, 785 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-25 18:05:32,563 INFO L231 Difference]: Finished difference. Result has 73 places, 41 transitions, 260 flow [2022-11-25 18:05:32,564 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=260, PETRI_PLACES=73, PETRI_TRANSITIONS=41} [2022-11-25 18:05:32,564 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 29 predicate places. [2022-11-25 18:05:32,564 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 41 transitions, 260 flow [2022-11-25 18:05:32,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:32,565 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:05:32,565 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:05:32,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-25 18:05:32,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:32,782 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:05:32,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:05:32,783 INFO L85 PathProgramCache]: Analyzing trace with hash 311724410, now seen corresponding path program 2 times [2022-11-25 18:05:32,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:05:32,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146859238] [2022-11-25 18:05:32,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:05:32,783 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:32,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:05:32,784 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:05:32,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-25 18:05:33,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:05:33,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:05:33,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 18:05:33,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:05:33,171 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 [2022-11-25 18:05:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:05:33,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:05:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:05:34,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:05:34,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146859238] [2022-11-25 18:05:34,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146859238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:05:34,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:05:34,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-25 18:05:34,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159242471] [2022-11-25 18:05:34,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:05:34,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:05:34,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:05:34,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:05:34,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:05:43,406 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 617 [2022-11-25 18:05:43,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 41 transitions, 260 flow. Second operand has 16 states, 16 states have (on average 247.625) internal successors, (3962), 16 states have internal predecessors, (3962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:43,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:05:43,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 617 [2022-11-25 18:05:43,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:05:45,535 INFO L130 PetriNetUnfolder]: 1061/1906 cut-off events. [2022-11-25 18:05:45,535 INFO L131 PetriNetUnfolder]: For 3685/3685 co-relation queries the response was YES. [2022-11-25 18:05:45,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6465 conditions, 1906 events. 1061/1906 cut-off events. For 3685/3685 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 10230 event pairs, 237 based on Foata normal form. 46/1918 useless extension candidates. Maximal degree in co-relation 6436. Up to 524 conditions per place. [2022-11-25 18:05:45,546 INFO L137 encePairwiseOnDemand]: 611/617 looper letters, 133 selfloop transitions, 9 changer transitions 0/142 dead transitions. [2022-11-25 18:05:45,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 142 transitions, 1060 flow [2022-11-25 18:05:45,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:05:45,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:05:45,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2560 transitions. [2022-11-25 18:05:45,550 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41491085899513774 [2022-11-25 18:05:45,550 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2560 transitions. [2022-11-25 18:05:45,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2560 transitions. [2022-11-25 18:05:45,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:05:45,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2560 transitions. [2022-11-25 18:05:45,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 256.0) internal successors, (2560), 10 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:45,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 617.0) internal successors, (6787), 11 states have internal predecessors, (6787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:45,558 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 617.0) internal successors, (6787), 11 states have internal predecessors, (6787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:45,558 INFO L175 Difference]: Start difference. First operand has 73 places, 41 transitions, 260 flow. Second operand 10 states and 2560 transitions. [2022-11-25 18:05:45,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 142 transitions, 1060 flow [2022-11-25 18:05:45,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 142 transitions, 1029 flow, removed 6 selfloop flow, removed 9 redundant places. [2022-11-25 18:05:45,565 INFO L231 Difference]: Finished difference. Result has 75 places, 43 transitions, 278 flow [2022-11-25 18:05:45,565 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=278, PETRI_PLACES=75, PETRI_TRANSITIONS=43} [2022-11-25 18:05:45,566 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2022-11-25 18:05:45,566 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 43 transitions, 278 flow [2022-11-25 18:05:45,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 247.625) internal successors, (3962), 16 states have internal predecessors, (3962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:45,567 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:05:45,567 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:05:45,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-25 18:05:45,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:45,769 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:05:45,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:05:45,769 INFO L85 PathProgramCache]: Analyzing trace with hash 311724459, now seen corresponding path program 2 times [2022-11-25 18:05:45,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:05:45,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053378088] [2022-11-25 18:05:45,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:05:45,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:45,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:05:45,771 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:05:45,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-25 18:05:45,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:05:45,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:05:45,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 18:05:45,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:05:46,062 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 18:05:46,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 18:05:46,130 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-25 18:05:46,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-25 18:05:46,227 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 18:05:46,227 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 [2022-11-25 18:05:46,249 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:05:46,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 18:05:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-25 18:05:46,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:05:46,553 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:05:46,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053378088] [2022-11-25 18:05:46,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053378088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:05:46,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:05:46,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:05:46,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204922599] [2022-11-25 18:05:46,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:05:46,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:05:46,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:05:46,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:05:46,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:05:47,436 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 617 [2022-11-25 18:05:47,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 43 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 244.2) internal successors, (1221), 5 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:47,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:05:47,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 617 [2022-11-25 18:05:47,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:05:47,998 INFO L130 PetriNetUnfolder]: 889/1612 cut-off events. [2022-11-25 18:05:47,998 INFO L131 PetriNetUnfolder]: For 2967/2967 co-relation queries the response was YES. [2022-11-25 18:05:48,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5328 conditions, 1612 events. 889/1612 cut-off events. For 2967/2967 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 8316 event pairs, 815 based on Foata normal form. 88/1700 useless extension candidates. Maximal degree in co-relation 5300. Up to 1600 conditions per place. [2022-11-25 18:05:48,008 INFO L137 encePairwiseOnDemand]: 612/617 looper letters, 37 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2022-11-25 18:05:48,008 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 40 transitions, 335 flow [2022-11-25 18:05:48,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:05:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:05:48,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1234 transitions. [2022-11-25 18:05:48,011 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4 [2022-11-25 18:05:48,012 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1234 transitions. [2022-11-25 18:05:48,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1234 transitions. [2022-11-25 18:05:48,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:05:48,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1234 transitions. [2022-11-25 18:05:48,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 246.8) internal successors, (1234), 5 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:48,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 617.0) internal successors, (3702), 6 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:48,019 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 617.0) internal successors, (3702), 6 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:48,019 INFO L175 Difference]: Start difference. First operand has 75 places, 43 transitions, 278 flow. Second operand 5 states and 1234 transitions. [2022-11-25 18:05:48,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 40 transitions, 335 flow [2022-11-25 18:05:48,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 40 transitions, 307 flow, removed 3 selfloop flow, removed 10 redundant places. [2022-11-25 18:05:48,027 INFO L231 Difference]: Finished difference. Result has 66 places, 40 transitions, 233 flow [2022-11-25 18:05:48,027 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=66, PETRI_TRANSITIONS=40} [2022-11-25 18:05:48,028 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2022-11-25 18:05:48,028 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 40 transitions, 233 flow [2022-11-25 18:05:48,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 244.2) internal successors, (1221), 5 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:48,028 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:05:48,029 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:05:48,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-25 18:05:48,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:48,243 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:05:48,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:05:48,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1073529374, now seen corresponding path program 3 times [2022-11-25 18:05:48,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:05:48,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073411112] [2022-11-25 18:05:48,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:05:48,245 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:48,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:05:48,247 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:05:48,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-25 18:05:48,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 18:05:48,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:05:48,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 18:05:48,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:05:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:05:48,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:05:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:05:49,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:05:49,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073411112] [2022-11-25 18:05:49,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073411112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:05:49,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:05:49,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-25 18:05:49,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146108096] [2022-11-25 18:05:49,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:05:49,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:05:49,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:05:49,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:05:49,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:05:49,684 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 617 [2022-11-25 18:05:49,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 40 transitions, 233 flow. Second operand has 14 states, 14 states have (on average 258.57142857142856) internal successors, (3620), 14 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:49,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:05:49,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 617 [2022-11-25 18:05:49,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:05:51,366 INFO L130 PetriNetUnfolder]: 784/1463 cut-off events. [2022-11-25 18:05:51,367 INFO L131 PetriNetUnfolder]: For 1571/1571 co-relation queries the response was YES. [2022-11-25 18:05:51,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4186 conditions, 1463 events. 784/1463 cut-off events. For 1571/1571 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7609 event pairs, 48 based on Foata normal form. 88/1551 useless extension candidates. Maximal degree in co-relation 4160. Up to 264 conditions per place. [2022-11-25 18:05:51,375 INFO L137 encePairwiseOnDemand]: 614/617 looper letters, 125 selfloop transitions, 6 changer transitions 0/131 dead transitions. [2022-11-25 18:05:51,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 131 transitions, 938 flow [2022-11-25 18:05:51,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:05:51,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:05:51,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2146 transitions. [2022-11-25 18:05:51,384 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43476499189627227 [2022-11-25 18:05:51,385 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2146 transitions. [2022-11-25 18:05:51,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2146 transitions. [2022-11-25 18:05:51,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:05:51,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2146 transitions. [2022-11-25 18:05:51,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 268.25) internal successors, (2146), 8 states have internal predecessors, (2146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:51,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 617.0) internal successors, (5553), 9 states have internal predecessors, (5553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:51,401 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 617.0) internal successors, (5553), 9 states have internal predecessors, (5553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:51,401 INFO L175 Difference]: Start difference. First operand has 66 places, 40 transitions, 233 flow. Second operand 8 states and 2146 transitions. [2022-11-25 18:05:51,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 131 transitions, 938 flow [2022-11-25 18:05:51,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 131 transitions, 920 flow, removed 0 selfloop flow, removed 9 redundant places. [2022-11-25 18:05:51,409 INFO L231 Difference]: Finished difference. Result has 63 places, 38 transitions, 209 flow [2022-11-25 18:05:51,409 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=209, PETRI_PLACES=63, PETRI_TRANSITIONS=38} [2022-11-25 18:05:51,410 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2022-11-25 18:05:51,410 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 38 transitions, 209 flow [2022-11-25 18:05:51,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 258.57142857142856) internal successors, (3620), 14 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:05:51,411 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:05:51,412 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-25 18:05:51,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-25 18:05:51,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:51,630 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:05:51,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:05:51,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1978589454, now seen corresponding path program 2 times [2022-11-25 18:05:51,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:05:51,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591729805] [2022-11-25 18:05:51,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:05:51,632 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:05:51,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:05:51,634 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:05:51,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-25 18:05:52,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:05:52,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:05:52,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 18:05:52,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:05:52,145 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-25 18:05:52,145 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-25 18:05:52,232 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-25 18:05:52,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-25 18:05:52,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:05:52,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:05:52,338 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:05:52,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 18:05:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:05:52,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:05:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:05:53,748 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:05:53,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591729805] [2022-11-25 18:05:53,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591729805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:05:53,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:05:53,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-25 18:05:53,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615731909] [2022-11-25 18:05:53,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:05:53,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:05:53,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:05:53,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:05:53,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:06:03,003 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 617 [2022-11-25 18:06:03,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 38 transitions, 209 flow. Second operand has 16 states, 16 states have (on average 244.0) internal successors, (3904), 16 states have internal predecessors, (3904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:03,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:06:03,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 617 [2022-11-25 18:06:03,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:06:06,754 INFO L130 PetriNetUnfolder]: 1591/2974 cut-off events. [2022-11-25 18:06:06,754 INFO L131 PetriNetUnfolder]: For 2483/2483 co-relation queries the response was YES. [2022-11-25 18:06:06,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8479 conditions, 2974 events. 1591/2974 cut-off events. For 2483/2483 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 16058 event pairs, 153 based on Foata normal form. 168/3142 useless extension candidates. Maximal degree in co-relation 8459. Up to 540 conditions per place. [2022-11-25 18:06:06,773 INFO L137 encePairwiseOnDemand]: 611/617 looper letters, 188 selfloop transitions, 14 changer transitions 0/202 dead transitions. [2022-11-25 18:06:06,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 202 transitions, 1251 flow [2022-11-25 18:06:06,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 18:06:06,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 18:06:06,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3544 transitions. [2022-11-25 18:06:06,781 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41028015744385277 [2022-11-25 18:06:06,781 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3544 transitions. [2022-11-25 18:06:06,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3544 transitions. [2022-11-25 18:06:06,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:06:06,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3544 transitions. [2022-11-25 18:06:06,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 253.14285714285714) internal successors, (3544), 14 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:06,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 617.0) internal successors, (9255), 15 states have internal predecessors, (9255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:06,798 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 617.0) internal successors, (9255), 15 states have internal predecessors, (9255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:06,798 INFO L175 Difference]: Start difference. First operand has 63 places, 38 transitions, 209 flow. Second operand 14 states and 3544 transitions. [2022-11-25 18:06:06,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 202 transitions, 1251 flow [2022-11-25 18:06:06,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 202 transitions, 1130 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 18:06:06,808 INFO L231 Difference]: Finished difference. Result has 77 places, 44 transitions, 303 flow [2022-11-25 18:06:06,808 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=303, PETRI_PLACES=77, PETRI_TRANSITIONS=44} [2022-11-25 18:06:06,809 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2022-11-25 18:06:06,809 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 44 transitions, 303 flow [2022-11-25 18:06:06,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 244.0) internal successors, (3904), 16 states have internal predecessors, (3904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:06,810 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:06:06,810 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:06:06,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-25 18:06:07,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:06:07,024 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:06:07,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:06:07,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1801470757, now seen corresponding path program 1 times [2022-11-25 18:06:07,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:06:07,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346842572] [2022-11-25 18:06:07,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:06:07,025 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:06:07,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:06:07,026 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:06:07,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-25 18:06:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:06:07,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:06:07,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:06:07,320 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:06:07,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:06:07,321 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:06:07,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346842572] [2022-11-25 18:06:07,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346842572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:06:07,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:06:07,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:06:07,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6787345] [2022-11-25 18:06:07,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:06:07,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:06:07,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:06:07,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:06:07,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:06:07,388 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 617 [2022-11-25 18:06:07,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 44 transitions, 303 flow. Second operand has 4 states, 4 states have (on average 259.25) internal successors, (1037), 4 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:07,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:06:07,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 617 [2022-11-25 18:06:07,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:06:08,285 INFO L130 PetriNetUnfolder]: 1589/2972 cut-off events. [2022-11-25 18:06:08,285 INFO L131 PetriNetUnfolder]: For 3188/3188 co-relation queries the response was YES. [2022-11-25 18:06:08,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8922 conditions, 2972 events. 1589/2972 cut-off events. For 3188/3188 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 16606 event pairs, 1319 based on Foata normal form. 2/2974 useless extension candidates. Maximal degree in co-relation 8894. Up to 2525 conditions per place. [2022-11-25 18:06:08,301 INFO L137 encePairwiseOnDemand]: 613/617 looper letters, 81 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2022-11-25 18:06:08,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 84 transitions, 811 flow [2022-11-25 18:06:08,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:06:08,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:06:08,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1061 transitions. [2022-11-25 18:06:08,304 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.429902755267423 [2022-11-25 18:06:08,304 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1061 transitions. [2022-11-25 18:06:08,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1061 transitions. [2022-11-25 18:06:08,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:06:08,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1061 transitions. [2022-11-25 18:06:08,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 265.25) internal successors, (1061), 4 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:08,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 617.0) internal successors, (3085), 5 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:08,311 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 617.0) internal successors, (3085), 5 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:08,311 INFO L175 Difference]: Start difference. First operand has 77 places, 44 transitions, 303 flow. Second operand 4 states and 1061 transitions. [2022-11-25 18:06:08,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 84 transitions, 811 flow [2022-11-25 18:06:08,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 84 transitions, 743 flow, removed 18 selfloop flow, removed 7 redundant places. [2022-11-25 18:06:08,324 INFO L231 Difference]: Finished difference. Result has 75 places, 45 transitions, 294 flow [2022-11-25 18:06:08,324 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=75, PETRI_TRANSITIONS=45} [2022-11-25 18:06:08,324 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 31 predicate places. [2022-11-25 18:06:08,325 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 45 transitions, 294 flow [2022-11-25 18:06:08,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 259.25) internal successors, (1037), 4 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:08,325 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:06:08,326 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:06:08,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-25 18:06:08,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:06:08,582 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:06:08,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:06:08,582 INFO L85 PathProgramCache]: Analyzing trace with hash 165037163, now seen corresponding path program 2 times [2022-11-25 18:06:08,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:06:08,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190662335] [2022-11-25 18:06:08,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:06:08,583 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:06:08,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:06:08,584 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:06:08,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-25 18:06:08,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:06:08,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:06:08,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:06:08,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:06:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:06:08,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:06:08,785 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:06:08,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190662335] [2022-11-25 18:06:08,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190662335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:06:08,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:06:08,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:06:08,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201892317] [2022-11-25 18:06:08,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:06:08,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:06:08,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:06:08,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:06:08,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:06:08,853 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 617 [2022-11-25 18:06:08,854 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 45 transitions, 294 flow. Second operand has 4 states, 4 states have (on average 259.25) internal successors, (1037), 4 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:08,854 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:06:08,854 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 617 [2022-11-25 18:06:08,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:06:09,772 INFO L130 PetriNetUnfolder]: 1585/2968 cut-off events. [2022-11-25 18:06:09,772 INFO L131 PetriNetUnfolder]: For 2995/2995 co-relation queries the response was YES. [2022-11-25 18:06:09,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9526 conditions, 2968 events. 1585/2968 cut-off events. For 2995/2995 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 16275 event pairs, 1422 based on Foata normal form. 4/2972 useless extension candidates. Maximal degree in co-relation 9498. Up to 2712 conditions per place. [2022-11-25 18:06:09,785 INFO L137 encePairwiseOnDemand]: 613/617 looper letters, 67 selfloop transitions, 3 changer transitions 2/72 dead transitions. [2022-11-25 18:06:09,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 540 flow [2022-11-25 18:06:09,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:06:09,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:06:09,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1060 transitions. [2022-11-25 18:06:09,788 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42949756888168555 [2022-11-25 18:06:09,788 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1060 transitions. [2022-11-25 18:06:09,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1060 transitions. [2022-11-25 18:06:09,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:06:09,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1060 transitions. [2022-11-25 18:06:09,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:09,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 617.0) internal successors, (3085), 5 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:09,792 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 617.0) internal successors, (3085), 5 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:09,792 INFO L175 Difference]: Start difference. First operand has 75 places, 45 transitions, 294 flow. Second operand 4 states and 1060 transitions. [2022-11-25 18:06:09,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 540 flow [2022-11-25 18:06:09,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 72 transitions, 524 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-25 18:06:09,806 INFO L231 Difference]: Finished difference. Result has 78 places, 46 transitions, 304 flow [2022-11-25 18:06:09,806 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=304, PETRI_PLACES=78, PETRI_TRANSITIONS=46} [2022-11-25 18:06:09,807 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2022-11-25 18:06:09,807 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 46 transitions, 304 flow [2022-11-25 18:06:09,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 259.25) internal successors, (1037), 4 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:09,807 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:06:09,808 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:06:09,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-25 18:06:10,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:06:10,021 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:06:10,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:06:10,021 INFO L85 PathProgramCache]: Analyzing trace with hash -952705209, now seen corresponding path program 3 times [2022-11-25 18:06:10,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:06:10,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306051337] [2022-11-25 18:06:10,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:06:10,022 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:06:10,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:06:10,023 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:06:10,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-25 18:06:10,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 18:06:10,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:06:10,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:06:10,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:06:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:06:10,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:06:10,229 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:06:10,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306051337] [2022-11-25 18:06:10,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306051337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:06:10,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:06:10,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:06:10,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616333069] [2022-11-25 18:06:10,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:06:10,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:06:10,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:06:10,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:06:10,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:06:10,293 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 617 [2022-11-25 18:06:10,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 46 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 257.25) internal successors, (1029), 4 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:10,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:06:10,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 617 [2022-11-25 18:06:10,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:06:11,282 INFO L130 PetriNetUnfolder]: 1706/3177 cut-off events. [2022-11-25 18:06:11,282 INFO L131 PetriNetUnfolder]: For 3934/3934 co-relation queries the response was YES. [2022-11-25 18:06:11,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10440 conditions, 3177 events. 1706/3177 cut-off events. For 3934/3934 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 17853 event pairs, 1319 based on Foata normal form. 88/3265 useless extension candidates. Maximal degree in co-relation 10410. Up to 2613 conditions per place. [2022-11-25 18:06:11,303 INFO L137 encePairwiseOnDemand]: 613/617 looper letters, 84 selfloop transitions, 4 changer transitions 0/88 dead transitions. [2022-11-25 18:06:11,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 88 transitions, 805 flow [2022-11-25 18:06:11,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:06:11,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:06:11,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1054 transitions. [2022-11-25 18:06:11,306 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42706645056726095 [2022-11-25 18:06:11,306 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1054 transitions. [2022-11-25 18:06:11,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1054 transitions. [2022-11-25 18:06:11,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:06:11,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1054 transitions. [2022-11-25 18:06:11,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 263.5) internal successors, (1054), 4 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:11,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 617.0) internal successors, (3085), 5 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:11,311 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 617.0) internal successors, (3085), 5 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:11,311 INFO L175 Difference]: Start difference. First operand has 78 places, 46 transitions, 304 flow. Second operand 4 states and 1054 transitions. [2022-11-25 18:06:11,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 88 transitions, 805 flow [2022-11-25 18:06:11,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 88 transitions, 795 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:06:11,330 INFO L231 Difference]: Finished difference. Result has 81 places, 48 transitions, 331 flow [2022-11-25 18:06:11,330 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=331, PETRI_PLACES=81, PETRI_TRANSITIONS=48} [2022-11-25 18:06:11,331 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 37 predicate places. [2022-11-25 18:06:11,331 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 48 transitions, 331 flow [2022-11-25 18:06:11,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 257.25) internal successors, (1029), 4 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:11,332 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:06:11,332 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:06:11,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-25 18:06:11,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:06:11,546 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:06:11,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:06:11,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1295663869, now seen corresponding path program 4 times [2022-11-25 18:06:11,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:06:11,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1472945336] [2022-11-25 18:06:11,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:06:11,548 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:06:11,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:06:11,549 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:06:11,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-25 18:06:11,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:06:11,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:06:11,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:06:11,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:06:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:06:11,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:06:11,882 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:06:11,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1472945336] [2022-11-25 18:06:11,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1472945336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:06:11,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:06:11,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:06:11,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539727616] [2022-11-25 18:06:11,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:06:11,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:06:11,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:06:11,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:06:11,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:06:11,960 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 617 [2022-11-25 18:06:11,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 48 transitions, 331 flow. Second operand has 4 states, 4 states have (on average 258.25) internal successors, (1033), 4 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) [2022-11-25 18:06:11,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:06:11,961 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 617 [2022-11-25 18:06:11,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:06:12,930 INFO L130 PetriNetUnfolder]: 1585/2946 cut-off events. [2022-11-25 18:06:12,930 INFO L131 PetriNetUnfolder]: For 3791/3791 co-relation queries the response was YES. [2022-11-25 18:06:12,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10054 conditions, 2946 events. 1585/2946 cut-off events. For 3791/3791 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 16418 event pairs, 12 based on Foata normal form. 88/3034 useless extension candidates. Maximal degree in co-relation 10022. Up to 2700 conditions per place. [2022-11-25 18:06:12,946 INFO L137 encePairwiseOnDemand]: 611/617 looper letters, 70 selfloop transitions, 6 changer transitions 1/77 dead transitions. [2022-11-25 18:06:12,946 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 77 transitions, 677 flow [2022-11-25 18:06:12,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:06:12,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:06:12,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1052 transitions. [2022-11-25 18:06:12,948 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42625607779578606 [2022-11-25 18:06:12,948 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1052 transitions. [2022-11-25 18:06:12,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1052 transitions. [2022-11-25 18:06:12,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:06:12,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1052 transitions. [2022-11-25 18:06:12,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:12,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 617.0) internal successors, (3085), 5 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:12,953 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 617.0) internal successors, (3085), 5 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:12,954 INFO L175 Difference]: Start difference. First operand has 81 places, 48 transitions, 331 flow. Second operand 4 states and 1052 transitions. [2022-11-25 18:06:12,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 77 transitions, 677 flow [2022-11-25 18:06:12,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 77 transitions, 670 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 18:06:12,968 INFO L231 Difference]: Finished difference. Result has 85 places, 49 transitions, 355 flow [2022-11-25 18:06:12,969 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=355, PETRI_PLACES=85, PETRI_TRANSITIONS=49} [2022-11-25 18:06:12,972 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2022-11-25 18:06:12,973 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 49 transitions, 355 flow [2022-11-25 18:06:12,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 258.25) internal successors, (1033), 4 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) [2022-11-25 18:06:12,973 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:06:12,974 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:06:12,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-25 18:06:13,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:06:13,190 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:06:13,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:06:13,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1534893063, now seen corresponding path program 1 times [2022-11-25 18:06:13,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:06:13,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483608671] [2022-11-25 18:06:13,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:06:13,192 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:06:13,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:06:13,193 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:06:13,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 18:06:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:06:13,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:06:13,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:06:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-25 18:06:13,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:06:13,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:06:13,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483608671] [2022-11-25 18:06:13,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483608671] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:06:13,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:06:13,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:06:13,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581582587] [2022-11-25 18:06:13,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:06:13,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:06:13,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:06:13,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:06:13,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:06:13,702 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 617 [2022-11-25 18:06:13,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 49 transitions, 355 flow. Second operand has 4 states, 4 states have (on average 258.5) internal successors, (1034), 4 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:13,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:06:13,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 617 [2022-11-25 18:06:13,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:06:14,612 INFO L130 PetriNetUnfolder]: 1635/3030 cut-off events. [2022-11-25 18:06:14,613 INFO L131 PetriNetUnfolder]: For 6861/6861 co-relation queries the response was YES. [2022-11-25 18:06:14,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10497 conditions, 3030 events. 1635/3030 cut-off events. For 6861/6861 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 17023 event pairs, 139 based on Foata normal form. 22/3052 useless extension candidates. Maximal degree in co-relation 10462. Up to 2662 conditions per place. [2022-11-25 18:06:14,632 INFO L137 encePairwiseOnDemand]: 611/617 looper letters, 70 selfloop transitions, 7 changer transitions 1/78 dead transitions. [2022-11-25 18:06:14,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 78 transitions, 713 flow [2022-11-25 18:06:14,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:06:14,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:06:14,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1051 transitions. [2022-11-25 18:06:14,636 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4258508914100486 [2022-11-25 18:06:14,636 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1051 transitions. [2022-11-25 18:06:14,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1051 transitions. [2022-11-25 18:06:14,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:06:14,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1051 transitions. [2022-11-25 18:06:14,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 262.75) internal successors, (1051), 4 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:14,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 617.0) internal successors, (3085), 5 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:14,644 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 617.0) internal successors, (3085), 5 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:14,645 INFO L175 Difference]: Start difference. First operand has 85 places, 49 transitions, 355 flow. Second operand 4 states and 1051 transitions. [2022-11-25 18:06:14,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 78 transitions, 713 flow [2022-11-25 18:06:14,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 78 transitions, 697 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-11-25 18:06:14,659 INFO L231 Difference]: Finished difference. Result has 85 places, 51 transitions, 392 flow [2022-11-25 18:06:14,659 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=392, PETRI_PLACES=85, PETRI_TRANSITIONS=51} [2022-11-25 18:06:14,660 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2022-11-25 18:06:14,660 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 51 transitions, 392 flow [2022-11-25 18:06:14,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 258.5) internal successors, (1034), 4 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:14,661 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:06:14,661 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:06:14,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-25 18:06:14,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:06:14,878 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:06:14,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:06:14,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1320515851, now seen corresponding path program 2 times [2022-11-25 18:06:14,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:06:14,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314710722] [2022-11-25 18:06:14,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:06:14,879 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:06:14,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:06:14,880 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:06:14,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 18:06:15,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:06:15,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:06:15,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:06:15,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:06:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-25 18:06:15,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:06:15,150 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:06:15,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314710722] [2022-11-25 18:06:15,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314710722] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:06:15,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:06:15,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:06:15,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224813399] [2022-11-25 18:06:15,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:06:15,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:06:15,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:06:15,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:06:15,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:06:15,233 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 617 [2022-11-25 18:06:15,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 51 transitions, 392 flow. Second operand has 4 states, 4 states have (on average 257.5) internal successors, (1030), 4 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:15,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:06:15,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 617 [2022-11-25 18:06:15,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:06:16,262 INFO L130 PetriNetUnfolder]: 1584/2925 cut-off events. [2022-11-25 18:06:16,262 INFO L131 PetriNetUnfolder]: For 5915/5915 co-relation queries the response was YES. [2022-11-25 18:06:16,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10229 conditions, 2925 events. 1584/2925 cut-off events. For 5915/5915 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 15647 event pairs, 1163 based on Foata normal form. 22/2947 useless extension candidates. Maximal degree in co-relation 10193. Up to 2709 conditions per place. [2022-11-25 18:06:16,283 INFO L137 encePairwiseOnDemand]: 612/617 looper letters, 66 selfloop transitions, 7 changer transitions 3/76 dead transitions. [2022-11-25 18:06:16,283 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 76 transitions, 653 flow [2022-11-25 18:06:16,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:06:16,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:06:16,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1052 transitions. [2022-11-25 18:06:16,286 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42625607779578606 [2022-11-25 18:06:16,286 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1052 transitions. [2022-11-25 18:06:16,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1052 transitions. [2022-11-25 18:06:16,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:06:16,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1052 transitions. [2022-11-25 18:06:16,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:16,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 617.0) internal successors, (3085), 5 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:16,290 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 617.0) internal successors, (3085), 5 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:16,290 INFO L175 Difference]: Start difference. First operand has 85 places, 51 transitions, 392 flow. Second operand 4 states and 1052 transitions. [2022-11-25 18:06:16,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 76 transitions, 653 flow [2022-11-25 18:06:16,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 76 transitions, 643 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 18:06:16,305 INFO L231 Difference]: Finished difference. Result has 88 places, 52 transitions, 416 flow [2022-11-25 18:06:16,305 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=617, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=416, PETRI_PLACES=88, PETRI_TRANSITIONS=52} [2022-11-25 18:06:16,306 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2022-11-25 18:06:16,306 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 52 transitions, 416 flow [2022-11-25 18:06:16,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 257.5) internal successors, (1030), 4 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:16,306 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:06:16,306 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:06:16,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-25 18:06:16,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:06:16,518 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-25 18:06:16,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:06:16,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1858237821, now seen corresponding path program 1 times [2022-11-25 18:06:16,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:06:16,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157818741] [2022-11-25 18:06:16,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:06:16,519 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:06:16,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:06:16,520 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:06:16,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6a599a70-0e34-4785-ab43-96caca1d8814/bin/uautomizer-ZsLfNo2U6R/mathsat -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 [2022-11-25 18:06:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:06:16,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 18:06:16,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:06:17,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:06:17,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:06:17,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:06:17,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:06:17,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:06:17,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:06:17,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:06:17,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:06:17,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:06:17,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:06:18,811 INFO L321 Elim1Store]: treesize reduction 288, result has 31.6 percent of original size [2022-11-25 18:06:18,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 24 select indices, 24 select index equivalence classes, 6 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 276 case distinctions, treesize of input 878 treesize of output 338 [2022-11-25 18:06:39,241 WARN L233 SmtUtils]: Spent 18.35s on a formula simplification. DAG size of input: 89 DAG size of output: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:06:58,739 WARN L233 SmtUtils]: Spent 18.28s on a formula simplification. DAG size of input: 74 DAG size of output: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:07:07,889 WARN L233 SmtUtils]: Spent 8.30s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:07:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:07:08,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:07:58,291 WARN L233 SmtUtils]: Spent 14.41s on a formula simplification. DAG size of input: 199 DAG size of output: 136 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:08:18,386 WARN L233 SmtUtils]: Spent 9.84s on a formula simplification. DAG size of input: 362 DAG size of output: 234 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-25 18:08:18,390 INFO L321 Elim1Store]: treesize reduction 420, result has 66.7 percent of original size [2022-11-25 18:08:18,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 408 treesize of output 941