./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 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_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 03:34:25,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:34:25,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:34:25,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:34:25,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:34:25,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:34:25,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:34:25,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:34:25,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:34:25,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:34:25,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:34:25,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:34:25,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:34:25,789 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:34:25,791 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:34:25,792 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:34:25,793 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:34:25,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:34:25,796 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:34:25,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:34:25,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:34:25,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:34:25,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:34:25,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:34:25,810 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:34:25,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:34:25,811 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:34:25,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:34:25,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:34:25,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:34:25,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:34:25,815 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:34:25,816 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:34:25,817 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:34:25,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:34:25,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:34:25,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:34:25,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:34:25,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:34:25,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:34:25,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:34:25,825 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-23 03:34:25,855 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:34:25,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:34:25,856 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:34:25,857 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:34:25,858 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:34:25,858 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:34:25,859 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:34:25,859 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:34:25,860 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:34:25,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:34:25,861 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:34:25,862 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 03:34:25,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:34:25,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:34:25,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:34:25,863 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 03:34:25,863 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 03:34:25,864 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 03:34:25,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:34:25,864 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 03:34:25,864 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:34:25,865 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:34:25,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:34:25,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:34:25,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:34:25,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:34:25,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:34:25,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:34:25,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:34:25,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:34:25,868 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:34:25,868 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:34:25,869 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:34:25,869 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_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a [2022-11-23 03:34:26,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:34:26,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:34:26,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:34:26,181 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:34:26,181 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:34:26,183 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2022-11-23 03:34:29,337 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:34:29,654 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:34:29,654 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2022-11-23 03:34:29,681 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/data/ea232fbf8/b4e30aa7db4846ca8379b799334a146a/FLAGcf1ef70c7 [2022-11-23 03:34:29,699 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/data/ea232fbf8/b4e30aa7db4846ca8379b799334a146a [2022-11-23 03:34:29,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:34:29,707 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:34:29,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:34:29,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:34:29,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:34:29,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:34:29" (1/1) ... [2022-11-23 03:34:29,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72bced1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:29, skipping insertion in model container [2022-11-23 03:34:29,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:34:29" (1/1) ... [2022-11-23 03:34:29,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:34:29,802 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:34:30,371 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_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i[47038,47051] [2022-11-23 03:34:30,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:34:30,540 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:34:30,575 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_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i[47038,47051] [2022-11-23 03:34:30,588 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:34:30,656 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:34:30,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:30 WrapperNode [2022-11-23 03:34:30,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:34:30,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:34:30,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:34:30,659 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:34:30,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:30" (1/1) ... [2022-11-23 03:34:30,684 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:30" (1/1) ... [2022-11-23 03:34:30,714 INFO L138 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 227 [2022-11-23 03:34:30,714 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:34:30,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:34:30,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:34:30,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:34:30,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:30" (1/1) ... [2022-11-23 03:34:30,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:30" (1/1) ... [2022-11-23 03:34:30,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:30" (1/1) ... [2022-11-23 03:34:30,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:30" (1/1) ... [2022-11-23 03:34:30,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:30" (1/1) ... [2022-11-23 03:34:30,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:30" (1/1) ... [2022-11-23 03:34:30,768 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:30" (1/1) ... [2022-11-23 03:34:30,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:30" (1/1) ... [2022-11-23 03:34:30,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:34:30,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:34:30,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:34:30,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:34:30,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:30" (1/1) ... [2022-11-23 03:34:30,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:34:30,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:34:30,806 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:34:30,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:34:30,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 03:34:30,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 03:34:30,863 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-11-23 03:34:30,864 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-11-23 03:34:30,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 03:34:30,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 03:34:30,864 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-11-23 03:34:30,870 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-11-23 03:34:30,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 03:34:30,871 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-23 03:34:30,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 03:34:30,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:34:30,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 03:34:30,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 03:34:30,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:34:30,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:34:30,875 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 03:34:31,100 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:34:31,102 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:34:31,666 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:34:31,682 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:34:31,686 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-23 03:34:31,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:34:31 BoogieIcfgContainer [2022-11-23 03:34:31,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:34:31,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:34:31,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:34:31,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:34:31,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:34:29" (1/3) ... [2022-11-23 03:34:31,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53dd377c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:34:31, skipping insertion in model container [2022-11-23 03:34:31,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:34:30" (2/3) ... [2022-11-23 03:34:31,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53dd377c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:34:31, skipping insertion in model container [2022-11-23 03:34:31,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:34:31" (3/3) ... [2022-11-23 03:34:31,702 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing.i [2022-11-23 03:34:31,721 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:34:31,721 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2022-11-23 03:34:31,722 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 03:34:31,895 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-23 03:34:31,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 287 transitions, 596 flow [2022-11-23 03:34:32,147 INFO L130 PetriNetUnfolder]: 54/537 cut-off events. [2022-11-23 03:34:32,147 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-11-23 03:34:32,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 537 events. 54/537 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2462 event pairs, 0 based on Foata normal form. 0/391 useless extension candidates. Maximal degree in co-relation 272. Up to 8 conditions per place. [2022-11-23 03:34:32,166 INFO L82 GeneralOperation]: Start removeDead. Operand has 267 places, 287 transitions, 596 flow [2022-11-23 03:34:32,176 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 267 places, 287 transitions, 596 flow [2022-11-23 03:34:32,179 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 03:34:32,201 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 267 places, 287 transitions, 596 flow [2022-11-23 03:34:32,204 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 267 places, 287 transitions, 596 flow [2022-11-23 03:34:32,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 287 transitions, 596 flow [2022-11-23 03:34:32,300 INFO L130 PetriNetUnfolder]: 54/537 cut-off events. [2022-11-23 03:34:32,300 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-11-23 03:34:32,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 537 events. 54/537 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2462 event pairs, 0 based on Foata normal form. 0/391 useless extension candidates. Maximal degree in co-relation 272. Up to 8 conditions per place. [2022-11-23 03:34:32,324 INFO L119 LiptonReduction]: Number of co-enabled transitions 27012 [2022-11-23 03:34:57,487 INFO L134 LiptonReduction]: Checked pairs total: 63208 [2022-11-23 03:34:57,487 INFO L136 LiptonReduction]: Total number of compositions: 261 [2022-11-23 03:34:57,503 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:34:57,510 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;@36c8499e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:34:57,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2022-11-23 03:34:57,513 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2022-11-23 03:34:57,514 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 03:34:57,514 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:34:57,515 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:34:57,516 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-23 03:34:57,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:34:57,522 INFO L85 PathProgramCache]: Analyzing trace with hash 36150, now seen corresponding path program 1 times [2022-11-23 03:34:57,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:34:57,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772308526] [2022-11-23 03:34:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:34:57,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:34:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:34:57,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:34:57,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:34:57,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772308526] [2022-11-23 03:34:57,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772308526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:34:57,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:34:57,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:34:57,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350403133] [2022-11-23 03:34:57,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:34:57,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 03:34:57,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:34:57,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 03:34:57,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 03:34:57,826 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 548 [2022-11-23 03:34:57,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 114 transitions, 250 flow. Second operand has 2 states, 2 states have (on average 264.0) internal successors, (528), 2 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:34:57,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:34:57,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 548 [2022-11-23 03:34:57,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:35:01,911 INFO L130 PetriNetUnfolder]: 18093/31373 cut-off events. [2022-11-23 03:35:01,911 INFO L131 PetriNetUnfolder]: For 159/159 co-relation queries the response was YES. [2022-11-23 03:35:01,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59180 conditions, 31373 events. 18093/31373 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 1022. Compared 252221 event pairs, 17344 based on Foata normal form. 1304/17107 useless extension candidates. Maximal degree in co-relation 56426. Up to 27656 conditions per place. [2022-11-23 03:35:02,106 INFO L137 encePairwiseOnDemand]: 533/548 looper letters, 80 selfloop transitions, 0 changer transitions 0/99 dead transitions. [2022-11-23 03:35:02,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 99 transitions, 380 flow [2022-11-23 03:35:02,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 03:35:02,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-23 03:35:02,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 621 transitions. [2022-11-23 03:35:02,129 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5666058394160584 [2022-11-23 03:35:02,130 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 621 transitions. [2022-11-23 03:35:02,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 621 transitions. [2022-11-23 03:35:02,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:35:02,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 621 transitions. [2022-11-23 03:35:02,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 310.5) internal successors, (621), 2 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:02,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 548.0) internal successors, (1644), 3 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:02,152 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 548.0) internal successors, (1644), 3 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:02,153 INFO L175 Difference]: Start difference. First operand has 101 places, 114 transitions, 250 flow. Second operand 2 states and 621 transitions. [2022-11-23 03:35:02,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 99 transitions, 380 flow [2022-11-23 03:35:02,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 99 transitions, 380 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 03:35:02,172 INFO L231 Difference]: Finished difference. Result has 98 places, 99 transitions, 220 flow [2022-11-23 03:35:02,175 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=220, PETRI_PLACES=98, PETRI_TRANSITIONS=99} [2022-11-23 03:35:02,179 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -3 predicate places. [2022-11-23 03:35:02,179 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 99 transitions, 220 flow [2022-11-23 03:35:02,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 264.0) internal successors, (528), 2 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:02,180 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:35:02,180 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-23 03:35:02,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 03:35:02,181 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-23 03:35:02,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:35:02,182 INFO L85 PathProgramCache]: Analyzing trace with hash 36145, now seen corresponding path program 1 times [2022-11-23 03:35:02,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:35:02,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838203437] [2022-11-23 03:35:02,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:02,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:35:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:35:02,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:35:02,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:35:02,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838203437] [2022-11-23 03:35:02,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838203437] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:35:02,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:35:02,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 03:35:02,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649208053] [2022-11-23 03:35:02,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:35:02,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:35:02,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:35:02,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:35:02,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:35:02,772 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 548 [2022-11-23 03:35:02,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 99 transitions, 220 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) [2022-11-23 03:35:02,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:35:02,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 548 [2022-11-23 03:35:02,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:35:06,615 INFO L130 PetriNetUnfolder]: 18093/31374 cut-off events. [2022-11-23 03:35:06,616 INFO L131 PetriNetUnfolder]: For 159/159 co-relation queries the response was YES. [2022-11-23 03:35:06,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59183 conditions, 31374 events. 18093/31374 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 1048. Compared 252368 event pairs, 17344 based on Foata normal form. 0/15804 useless extension candidates. Maximal degree in co-relation 59178. Up to 27656 conditions per place. [2022-11-23 03:35:06,778 INFO L137 encePairwiseOnDemand]: 543/548 looper letters, 79 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2022-11-23 03:35:06,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 100 transitions, 384 flow [2022-11-23 03:35:06,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:35:06,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:35:06,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 846 transitions. [2022-11-23 03:35:06,781 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5145985401459854 [2022-11-23 03:35:06,782 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 846 transitions. [2022-11-23 03:35:06,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 846 transitions. [2022-11-23 03:35:06,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:35:06,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 846 transitions. [2022-11-23 03:35:06,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 282.0) internal successors, (846), 3 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:06,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:06,792 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:06,792 INFO L175 Difference]: Start difference. First operand has 98 places, 99 transitions, 220 flow. Second operand 3 states and 846 transitions. [2022-11-23 03:35:06,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 100 transitions, 384 flow [2022-11-23 03:35:06,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 100 transitions, 384 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-23 03:35:06,802 INFO L231 Difference]: Finished difference. Result has 101 places, 100 transitions, 236 flow [2022-11-23 03:35:06,803 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=101, PETRI_TRANSITIONS=100} [2022-11-23 03:35:06,804 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, 0 predicate places. [2022-11-23 03:35:06,804 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 100 transitions, 236 flow [2022-11-23 03:35:06,805 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) [2022-11-23 03:35:06,805 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:35:06,805 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-23 03:35:06,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 03:35:06,806 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-23 03:35:06,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:35:06,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1121951, now seen corresponding path program 1 times [2022-11-23 03:35:06,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:35:06,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411348131] [2022-11-23 03:35:06,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:06,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:35:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:35:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:35:07,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:35:07,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411348131] [2022-11-23 03:35:07,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411348131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:35:07,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838078478] [2022-11-23 03:35:07,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:07,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:35:07,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:35:07,224 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:35:07,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 03:35:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:35:07,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 03:35:07,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:35:07,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:35:07,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:35:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:35:07,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:35:13,597 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:35:13,662 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:35:13,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2022-11-23 03:35:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:35:15,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838078478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:35:15,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:35:15,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-23 03:35:15,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14494201] [2022-11-23 03:35:15,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:35:15,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:35:15,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:35:15,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:35:15,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:35:18,581 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 548 [2022-11-23 03:35:18,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 100 transitions, 236 flow. Second operand has 8 states, 8 states have (on average 245.125) internal successors, (1961), 8 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:18,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:35:18,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 548 [2022-11-23 03:35:18,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:35:30,895 INFO L130 PetriNetUnfolder]: 45067/76945 cut-off events. [2022-11-23 03:35:30,895 INFO L131 PetriNetUnfolder]: For 477/477 co-relation queries the response was YES. [2022-11-23 03:35:31,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146033 conditions, 76945 events. 45067/76945 cut-off events. For 477/477 co-relation queries the response was YES. Maximal size of possible extension queue 2417. Compared 693857 event pairs, 37272 based on Foata normal form. 0/37299 useless extension candidates. Maximal degree in co-relation 146026. Up to 28736 conditions per place. [2022-11-23 03:35:31,336 INFO L137 encePairwiseOnDemand]: 542/548 looper letters, 223 selfloop transitions, 7 changer transitions 0/249 dead transitions. [2022-11-23 03:35:31,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 249 transitions, 1044 flow [2022-11-23 03:35:31,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:35:31,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-23 03:35:31,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1699 transitions. [2022-11-23 03:35:31,342 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5167274939172749 [2022-11-23 03:35:31,343 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1699 transitions. [2022-11-23 03:35:31,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1699 transitions. [2022-11-23 03:35:31,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:35:31,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1699 transitions. [2022-11-23 03:35:31,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 283.1666666666667) internal successors, (1699), 6 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:31,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 548.0) internal successors, (3836), 7 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:31,359 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 548.0) internal successors, (3836), 7 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:31,359 INFO L175 Difference]: Start difference. First operand has 101 places, 100 transitions, 236 flow. Second operand 6 states and 1699 transitions. [2022-11-23 03:35:31,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 249 transitions, 1044 flow [2022-11-23 03:35:31,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 249 transitions, 1040 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-23 03:35:31,370 INFO L231 Difference]: Finished difference. Result has 108 places, 105 transitions, 284 flow [2022-11-23 03:35:31,370 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=284, PETRI_PLACES=108, PETRI_TRANSITIONS=105} [2022-11-23 03:35:31,373 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, 7 predicate places. [2022-11-23 03:35:31,373 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 105 transitions, 284 flow [2022-11-23 03:35:31,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 245.125) internal successors, (1961), 8 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:31,375 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:35:31,375 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2022-11-23 03:35:31,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 03:35:31,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:35:31,582 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-23 03:35:31,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:35:31,582 INFO L85 PathProgramCache]: Analyzing trace with hash 34781940, now seen corresponding path program 1 times [2022-11-23 03:35:31,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:35:31,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611279979] [2022-11-23 03:35:31,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:31,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:35:31,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:35:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:35:31,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:35:31,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611279979] [2022-11-23 03:35:31,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611279979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:35:31,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:35:31,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:35:31,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528386770] [2022-11-23 03:35:31,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:35:31,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:35:31,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:35:31,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:35:31,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:35:31,925 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 548 [2022-11-23 03:35:31,926 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 105 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:31,926 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:35:31,926 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 548 [2022-11-23 03:35:31,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:35:38,842 INFO L130 PetriNetUnfolder]: 45566/78515 cut-off events. [2022-11-23 03:35:38,842 INFO L131 PetriNetUnfolder]: For 1907/1907 co-relation queries the response was YES. [2022-11-23 03:35:38,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151162 conditions, 78515 events. 45566/78515 cut-off events. For 1907/1907 co-relation queries the response was YES. Maximal size of possible extension queue 2548. Compared 720309 event pairs, 36064 based on Foata normal form. 0/41445 useless extension candidates. Maximal degree in co-relation 151152. Up to 60818 conditions per place. [2022-11-23 03:35:39,227 INFO L137 encePairwiseOnDemand]: 540/548 looper letters, 125 selfloop transitions, 7 changer transitions 0/151 dead transitions. [2022-11-23 03:35:39,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 151 transitions, 636 flow [2022-11-23 03:35:39,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:35:39,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:35:39,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 891 transitions. [2022-11-23 03:35:39,231 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.541970802919708 [2022-11-23 03:35:39,231 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 891 transitions. [2022-11-23 03:35:39,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 891 transitions. [2022-11-23 03:35:39,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:35:39,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 891 transitions. [2022-11-23 03:35:39,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.0) internal successors, (891), 3 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:39,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:39,240 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:39,241 INFO L175 Difference]: Start difference. First operand has 108 places, 105 transitions, 284 flow. Second operand 3 states and 891 transitions. [2022-11-23 03:35:39,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 151 transitions, 636 flow [2022-11-23 03:35:39,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 151 transitions, 630 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-23 03:35:39,253 INFO L231 Difference]: Finished difference. Result has 110 places, 107 transitions, 316 flow [2022-11-23 03:35:39,254 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=316, PETRI_PLACES=110, PETRI_TRANSITIONS=107} [2022-11-23 03:35:39,254 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, 9 predicate places. [2022-11-23 03:35:39,255 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 107 transitions, 316 flow [2022-11-23 03:35:39,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:39,255 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:35:39,256 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2022-11-23 03:35:39,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 03:35:39,256 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-23 03:35:39,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:35:39,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1078239598, now seen corresponding path program 1 times [2022-11-23 03:35:39,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:35:39,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228827100] [2022-11-23 03:35:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:39,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:35:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:35:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:35:39,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:35:39,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228827100] [2022-11-23 03:35:39,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228827100] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:35:39,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101256068] [2022-11-23 03:35:39,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:39,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:35:39,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:35:39,366 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:35:39,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 03:35:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:35:39,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 03:35:39,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:35:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:35:39,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:35:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:35:39,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101256068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:35:39,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:35:39,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-23 03:35:39,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325279249] [2022-11-23 03:35:39,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:35:39,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 03:35:39,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:35:39,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 03:35:39,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-23 03:35:39,648 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 548 [2022-11-23 03:35:39,651 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 107 transitions, 316 flow. Second operand has 9 states, 9 states have (on average 259.22222222222223) internal successors, (2333), 9 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:39,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:35:39,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 548 [2022-11-23 03:35:39,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:35:43,405 INFO L130 PetriNetUnfolder]: 21011/36823 cut-off events. [2022-11-23 03:35:43,406 INFO L131 PetriNetUnfolder]: For 6543/6543 co-relation queries the response was YES. [2022-11-23 03:35:43,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73936 conditions, 36823 events. 21011/36823 cut-off events. For 6543/6543 co-relation queries the response was YES. Maximal size of possible extension queue 1271. Compared 308849 event pairs, 19432 based on Foata normal form. 4/21501 useless extension candidates. Maximal degree in co-relation 73924. Up to 32395 conditions per place. [2022-11-23 03:35:43,602 INFO L137 encePairwiseOnDemand]: 544/548 looper letters, 82 selfloop transitions, 8 changer transitions 0/109 dead transitions. [2022-11-23 03:35:43,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 109 transitions, 510 flow [2022-11-23 03:35:43,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 03:35:43,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-23 03:35:43,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2155 transitions. [2022-11-23 03:35:43,609 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4915602189781022 [2022-11-23 03:35:43,610 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2155 transitions. [2022-11-23 03:35:43,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2155 transitions. [2022-11-23 03:35:43,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:35:43,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2155 transitions. [2022-11-23 03:35:43,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 269.375) internal successors, (2155), 8 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:43,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:43,630 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:43,630 INFO L175 Difference]: Start difference. First operand has 110 places, 107 transitions, 316 flow. Second operand 8 states and 2155 transitions. [2022-11-23 03:35:43,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 109 transitions, 510 flow [2022-11-23 03:35:43,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 109 transitions, 490 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-23 03:35:43,664 INFO L231 Difference]: Finished difference. Result has 120 places, 108 transitions, 340 flow [2022-11-23 03:35:43,664 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=340, PETRI_PLACES=120, PETRI_TRANSITIONS=108} [2022-11-23 03:35:43,667 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, 19 predicate places. [2022-11-23 03:35:43,667 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 108 transitions, 340 flow [2022-11-23 03:35:43,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 259.22222222222223) internal successors, (2333), 9 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:43,668 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:35:43,669 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-23 03:35:43,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 03:35:43,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:35:43,875 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-23 03:35:43,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:35:43,875 INFO L85 PathProgramCache]: Analyzing trace with hash -934250319, now seen corresponding path program 2 times [2022-11-23 03:35:43,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:35:43,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155761834] [2022-11-23 03:35:43,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:43,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:35:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:35:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:35:45,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:35:45,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155761834] [2022-11-23 03:35:45,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155761834] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:35:45,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563478124] [2022-11-23 03:35:45,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:35:45,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:35:45,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:35:45,046 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:35:45,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 03:35:45,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:35:45,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:35:45,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-23 03:35:45,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:35:45,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:35:45,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:35:45,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:35:45,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:35:45,394 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 03:35:45,394 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 11 treesize of output 11 [2022-11-23 03:35:45,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:35:45,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:35:45,456 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 03:35:45,457 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 11 treesize of output 11 [2022-11-23 03:35:45,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 03:35:45,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 03:35:45,789 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 03:35:45,790 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 11 treesize of output 11 [2022-11-23 03:35:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:35:45,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:35:51,899 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:35:51,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:35:51,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2022-11-23 03:35:54,199 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:35:54,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 70 [2022-11-23 03:36:00,350 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:36:00,405 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:36:00,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 76 [2022-11-23 03:36:04,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 03:36:04,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 82 [2022-11-23 03:36:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:36:09,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563478124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:36:09,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 03:36:09,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-11-23 03:36:09,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84278788] [2022-11-23 03:36:09,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 03:36:09,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 03:36:09,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:36:09,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 03:36:09,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-11-23 03:36:13,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:36:23,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:36:26,261 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 548 [2022-11-23 03:36:26,263 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 108 transitions, 340 flow. Second operand has 17 states, 17 states have (on average 245.05882352941177) internal successors, (4166), 17 states have internal predecessors, (4166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:36:26,263 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:36:26,263 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 548 [2022-11-23 03:36:26,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:36:29,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:36:30,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:36:32,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:36:34,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:36:38,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:36:40,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 03:36:48,691 INFO L130 PetriNetUnfolder]: 34300/59116 cut-off events. [2022-11-23 03:36:48,691 INFO L131 PetriNetUnfolder]: For 2971/2971 co-relation queries the response was YES. [2022-11-23 03:36:48,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116814 conditions, 59116 events. 34300/59116 cut-off events. For 2971/2971 co-relation queries the response was YES. Maximal size of possible extension queue 1955. Compared 537330 event pairs, 8743 based on Foata normal form. 6/33234 useless extension candidates. Maximal degree in co-relation 116798. Up to 33725 conditions per place. [2022-11-23 03:36:49,002 INFO L137 encePairwiseOnDemand]: 541/548 looper letters, 256 selfloop transitions, 19 changer transitions 0/294 dead transitions. [2022-11-23 03:36:49,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 294 transitions, 1376 flow [2022-11-23 03:36:49,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 03:36:49,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-23 03:36:49,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 3694 transitions. [2022-11-23 03:36:49,010 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48149113660062565 [2022-11-23 03:36:49,010 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 3694 transitions. [2022-11-23 03:36:49,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 3694 transitions. [2022-11-23 03:36:49,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:36:49,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 3694 transitions. [2022-11-23 03:36:49,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 263.85714285714283) internal successors, (3694), 14 states have internal predecessors, (3694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:36:49,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 548.0) internal successors, (8220), 15 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:36:49,034 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 548.0) internal successors, (8220), 15 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:36:49,034 INFO L175 Difference]: Start difference. First operand has 120 places, 108 transitions, 340 flow. Second operand 14 states and 3694 transitions. [2022-11-23 03:36:49,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 294 transitions, 1376 flow [2022-11-23 03:36:49,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 294 transitions, 1335 flow, removed 12 selfloop flow, removed 8 redundant places. [2022-11-23 03:36:49,050 INFO L231 Difference]: Finished difference. Result has 131 places, 120 transitions, 432 flow [2022-11-23 03:36:49,050 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=432, PETRI_PLACES=131, PETRI_TRANSITIONS=120} [2022-11-23 03:36:49,051 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, 30 predicate places. [2022-11-23 03:36:49,051 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 120 transitions, 432 flow [2022-11-23 03:36:49,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 245.05882352941177) internal successors, (4166), 17 states have internal predecessors, (4166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:36:49,053 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:36:49,053 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1] [2022-11-23 03:36:49,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 03:36:49,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:36:49,266 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-23 03:36:49,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:36:49,266 INFO L85 PathProgramCache]: Analyzing trace with hash -861731346, now seen corresponding path program 2 times [2022-11-23 03:36:49,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:36:49,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95799137] [2022-11-23 03:36:49,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:36:49,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:36:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:36:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:36:49,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:36:49,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95799137] [2022-11-23 03:36:49,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95799137] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:36:49,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328095237] [2022-11-23 03:36:49,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:36:49,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:36:49,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:36:49,533 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:36:49,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 03:36:49,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 03:36:49,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:36:49,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 03:36:49,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:36:49,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 03:36:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 03:36:49,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:36:49,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328095237] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:36:49,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 03:36:49,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2022-11-23 03:36:49,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436927492] [2022-11-23 03:36:49,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:36:49,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:36:49,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:36:49,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:36:49,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:36:49,892 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 548 [2022-11-23 03:36:49,893 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 120 transitions, 432 flow. Second operand has 3 states, 3 states have (on average 257.3333333333333) internal successors, (772), 3 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:36:49,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:36:49,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 548 [2022-11-23 03:36:49,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-23 03:36:55,693 INFO L130 PetriNetUnfolder]: 33955/58484 cut-off events. [2022-11-23 03:36:55,693 INFO L131 PetriNetUnfolder]: For 8668/8668 co-relation queries the response was YES. [2022-11-23 03:36:55,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119337 conditions, 58484 events. 33955/58484 cut-off events. For 8668/8668 co-relation queries the response was YES. Maximal size of possible extension queue 1774. Compared 509771 event pairs, 30252 based on Foata normal form. 5/33733 useless extension candidates. Maximal degree in co-relation 119317. Up to 51933 conditions per place. [2022-11-23 03:36:56,036 INFO L137 encePairwiseOnDemand]: 543/548 looper letters, 101 selfloop transitions, 5 changer transitions 0/125 dead transitions. [2022-11-23 03:36:56,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 125 transitions, 661 flow [2022-11-23 03:36:56,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 03:36:56,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-23 03:36:56,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 853 transitions. [2022-11-23 03:36:56,040 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5188564476885644 [2022-11-23 03:36:56,040 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 853 transitions. [2022-11-23 03:36:56,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 853 transitions. [2022-11-23 03:36:56,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-23 03:36:56,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 853 transitions. [2022-11-23 03:36:56,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 284.3333333333333) internal successors, (853), 3 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:36:56,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:36:56,046 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:36:56,046 INFO L175 Difference]: Start difference. First operand has 131 places, 120 transitions, 432 flow. Second operand 3 states and 853 transitions. [2022-11-23 03:36:56,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 125 transitions, 661 flow [2022-11-23 03:36:56,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 125 transitions, 622 flow, removed 13 selfloop flow, removed 6 redundant places. [2022-11-23 03:36:56,058 INFO L231 Difference]: Finished difference. Result has 128 places, 123 transitions, 439 flow [2022-11-23 03:36:56,059 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=439, PETRI_PLACES=128, PETRI_TRANSITIONS=123} [2022-11-23 03:36:56,059 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, 27 predicate places. [2022-11-23 03:36:56,060 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 123 transitions, 439 flow [2022-11-23 03:36:56,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.3333333333333) internal successors, (772), 3 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:36:56,060 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-23 03:36:56,060 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1] [2022-11-23 03:36:56,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 03:36:56,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01bd9e22-53e7-4a7d-a82b-e7361cb06f1a/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 03:36:56,266 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-23 03:36:56,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:36:56,267 INFO L85 PathProgramCache]: Analyzing trace with hash -861731347, now seen corresponding path program 1 times [2022-11-23 03:36:56,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:36:56,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113622075] [2022-11-23 03:36:56,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:36:56,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:36:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:36:56,391 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-23 03:36:56,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:36:56,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113622075] [2022-11-23 03:36:56,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113622075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:36:56,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:36:56,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:36:56,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90392682] [2022-11-23 03:36:56,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:36:56,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 03:36:56,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:36:56,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 03:36:56,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 03:36:56,522 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 548 [2022-11-23 03:36:56,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 123 transitions, 439 flow. Second operand has 3 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:36:56,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-23 03:36:56,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 548 [2022-11-23 03:36:56,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand