./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_84-list2_racing2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_4cd4e77d-18b6-4a98-9ff8-3a00109d9152/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd4e77d-18b6-4a98-9ff8-3a00109d9152/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd4e77d-18b6-4a98-9ff8-3a00109d9152/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd4e77d-18b6-4a98-9ff8-3a00109d9152/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_84-list2_racing2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd4e77d-18b6-4a98-9ff8-3a00109d9152/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd4e77d-18b6-4a98-9ff8-3a00109d9152/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f70125267ee7251a74a40ef1ba0ea3ced14d0fe45e7a9ea5a666e1eecab0c01c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 20:58:34,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 20:58:34,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 20:58:34,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 20:58:34,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 20:58:34,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 20:58:34,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 20:58:34,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 20:58:34,809 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 20:58:34,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 20:58:34,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 20:58:34,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 20:58:34,812 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 20:58:34,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 20:58:34,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 20:58:34,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 20:58:34,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 20:58:34,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 20:58:34,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 20:58:34,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 20:58:34,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 20:58:34,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 20:58:34,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 20:58:34,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 20:58:34,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 20:58:34,828 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 20:58:34,828 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 20:58:34,829 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 20:58:34,829 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 20:58:34,830 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 20:58:34,830 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 20:58:34,831 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 20:58:34,832 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 20:58:34,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 20:58:34,834 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 20:58:34,834 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 20:58:34,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 20:58:34,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 20:58:34,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 20:58:34,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 20:58:34,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 20:58:34,837 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd4e77d-18b6-4a98-9ff8-3a00109d9152/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 20:58:34,858 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 20:58:34,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 20:58:34,858 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 20:58:34,863 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 20:58:34,864 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 20:58:34,864 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 20:58:34,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 20:58:34,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 20:58:34,865 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 20:58:34,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 20:58:34,866 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 20:58:34,866 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 20:58:34,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 20:58:34,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 20:58:34,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 20:58:34,867 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 20:58:34,867 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 20:58:34,867 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 20:58:34,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 20:58:34,867 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 20:58:34,868 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 20:58:34,868 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 20:58:34,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 20:58:34,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 20:58:34,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 20:58:34,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:58:34,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 20:58:34,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 20:58:34,869 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 20:58:34,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 20:58:34,870 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 20:58:34,870 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 20:58:34,870 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 20:58:34,870 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 20:58:34,870 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_4cd4e77d-18b6-4a98-9ff8-3a00109d9152/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd4e77d-18b6-4a98-9ff8-3a00109d9152/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f70125267ee7251a74a40ef1ba0ea3ced14d0fe45e7a9ea5a666e1eecab0c01c [2022-12-13 20:58:35,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 20:58:35,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 20:58:35,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 20:58:35,074 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 20:58:35,074 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 20:58:35,075 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd4e77d-18b6-4a98-9ff8-3a00109d9152/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_84-list2_racing2.i [2022-12-13 20:58:37,649 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 20:58:37,816 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 20:58:37,817 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd4e77d-18b6-4a98-9ff8-3a00109d9152/sv-benchmarks/c/goblint-regression/28-race_reach_84-list2_racing2.i [2022-12-13 20:58:37,826 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd4e77d-18b6-4a98-9ff8-3a00109d9152/bin/uautomizer-uyxdKDjOR8/data/7bbc210f1/42cd629110ab40878eda998a4b380aab/FLAG8fec92e13 [2022-12-13 20:58:37,837 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd4e77d-18b6-4a98-9ff8-3a00109d9152/bin/uautomizer-uyxdKDjOR8/data/7bbc210f1/42cd629110ab40878eda998a4b380aab [2022-12-13 20:58:37,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 20:58:37,839 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 20:58:37,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 20:58:37,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 20:58:37,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 20:58:37,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:58:37" (1/1) ... [2022-12-13 20:58:37,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54c786ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:37, skipping insertion in model container [2022-12-13 20:58:37,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:58:37" (1/1) ... [2022-12-13 20:58:37,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 20:58:37,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:58:38,249 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_4cd4e77d-18b6-4a98-9ff8-3a00109d9152/sv-benchmarks/c/goblint-regression/28-race_reach_84-list2_racing2.i[47038,47051] [2022-12-13 20:58:38,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:58:38,291 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 20:58:38,316 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_4cd4e77d-18b6-4a98-9ff8-3a00109d9152/sv-benchmarks/c/goblint-regression/28-race_reach_84-list2_racing2.i[47038,47051] [2022-12-13 20:58:38,329 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:58:38,364 INFO L208 MainTranslator]: Completed translation [2022-12-13 20:58:38,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:38 WrapperNode [2022-12-13 20:58:38,364 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 20:58:38,365 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 20:58:38,365 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 20:58:38,365 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 20:58:38,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:38" (1/1) ... [2022-12-13 20:58:38,383 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:38" (1/1) ... [2022-12-13 20:58:38,408 INFO L138 Inliner]: procedures = 279, calls = 88, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 378 [2022-12-13 20:58:38,408 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 20:58:38,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 20:58:38,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 20:58:38,408 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 20:58:38,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:38" (1/1) ... [2022-12-13 20:58:38,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:38" (1/1) ... [2022-12-13 20:58:38,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:38" (1/1) ... [2022-12-13 20:58:38,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:38" (1/1) ... [2022-12-13 20:58:38,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:38" (1/1) ... [2022-12-13 20:58:38,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:38" (1/1) ... [2022-12-13 20:58:38,435 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:38" (1/1) ... [2022-12-13 20:58:38,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:38" (1/1) ... [2022-12-13 20:58:38,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 20:58:38,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 20:58:38,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 20:58:38,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 20:58:38,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:38" (1/1) ... [2022-12-13 20:58:38,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:58:38,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd4e77d-18b6-4a98-9ff8-3a00109d9152/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:58:38,463 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd4e77d-18b6-4a98-9ff8-3a00109d9152/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 20:58:38,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd4e77d-18b6-4a98-9ff8-3a00109d9152/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 20:58:38,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 20:58:38,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 20:58:38,491 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-12-13 20:58:38,492 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-12-13 20:58:38,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 20:58:38,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 20:58:38,492 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-12-13 20:58:38,492 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-12-13 20:58:38,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 20:58:38,492 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 20:58:38,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 20:58:38,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 20:58:38,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 20:58:38,492 INFO L130 BoogieDeclarations]: Found specification of procedure t3_fun [2022-12-13 20:58:38,492 INFO L138 BoogieDeclarations]: Found implementation of procedure t3_fun [2022-12-13 20:58:38,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 20:58:38,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 20:58:38,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 20:58:38,494 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 20:58:38,672 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 20:58:38,674 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 20:58:39,194 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 20:58:39,202 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 20:58:39,202 INFO L300 CfgBuilder]: Removed 29 assume(true) statements. [2022-12-13 20:58:39,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:58:39 BoogieIcfgContainer [2022-12-13 20:58:39,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 20:58:39,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 20:58:39,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 20:58:39,209 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 20:58:39,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 08:58:37" (1/3) ... [2022-12-13 20:58:39,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e9f930a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:58:39, skipping insertion in model container [2022-12-13 20:58:39,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:58:38" (2/3) ... [2022-12-13 20:58:39,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e9f930a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:58:39, skipping insertion in model container [2022-12-13 20:58:39,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:58:39" (3/3) ... [2022-12-13 20:58:39,212 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_84-list2_racing2.i [2022-12-13 20:58:39,228 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 20:58:39,229 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 71 error locations. [2022-12-13 20:58:39,229 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 20:58:39,346 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2022-12-13 20:58:39,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 440 places, 481 transitions, 1004 flow [2022-12-13 20:58:39,822 INFO L130 PetriNetUnfolder]: 188/1750 cut-off events. [2022-12-13 20:58:39,822 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-12-13 20:58:39,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1811 conditions, 1750 events. 188/1750 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 12631 event pairs, 0 based on Foata normal form. 0/1288 useless extension candidates. Maximal degree in co-relation 897. Up to 16 conditions per place. [2022-12-13 20:58:39,849 INFO L82 GeneralOperation]: Start removeDead. Operand has 440 places, 481 transitions, 1004 flow [2022-12-13 20:58:39,871 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 440 places, 481 transitions, 1004 flow [2022-12-13 20:58:39,874 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 20:58:39,882 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 440 places, 481 transitions, 1004 flow [2022-12-13 20:58:39,884 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 440 places, 481 transitions, 1004 flow [2022-12-13 20:58:39,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 440 places, 481 transitions, 1004 flow [2022-12-13 20:58:40,199 INFO L130 PetriNetUnfolder]: 188/1750 cut-off events. [2022-12-13 20:58:40,200 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-12-13 20:58:40,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1811 conditions, 1750 events. 188/1750 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 12631 event pairs, 0 based on Foata normal form. 0/1288 useless extension candidates. Maximal degree in co-relation 897. Up to 16 conditions per place. [2022-12-13 20:58:40,279 INFO L119 LiptonReduction]: Number of co-enabled transitions 105040 [2022-12-13 20:59:01,437 INFO L134 LiptonReduction]: Checked pairs total: 302059 [2022-12-13 20:59:01,437 INFO L136 LiptonReduction]: Total number of compositions: 418 [2022-12-13 20:59:01,448 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:59:01,452 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;@35c81977, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:59:01,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 114 error locations. [2022-12-13 20:59:01,453 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-12-13 20:59:01,453 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 20:59:01,453 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 20:59:01,454 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-12-13 20:59:01,454 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 111 more)] === [2022-12-13 20:59:01,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:59:01,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1837, now seen corresponding path program 1 times [2022-12-13 20:59:01,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:59:01,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011767668] [2022-12-13 20:59:01,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:59:01,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:59:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:59:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:59:01,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:59:01,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011767668] [2022-12-13 20:59:01,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011767668] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:59:01,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:59:01,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-13 20:59:01,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506789709] [2022-12-13 20:59:01,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:59:01,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 20:59:01,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:59:01,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 20:59:01,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 20:59:01,569 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 436 out of 899 [2022-12-13 20:59:01,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 197 transitions, 436 flow. Second operand has 2 states, 2 states have (on average 436.5) internal successors, (873), 2 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:59:01,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 20:59:01,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 436 of 899 [2022-12-13 20:59:01,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:00:47,328 INFO L130 PetriNetUnfolder]: 1113829/1611807 cut-off events. [2022-12-13 21:00:47,328 INFO L131 PetriNetUnfolder]: For 9086/9086 co-relation queries the response was YES. [2022-12-13 21:00:49,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3100112 conditions, 1611807 events. 1113829/1611807 cut-off events. For 9086/9086 co-relation queries the response was YES. Maximal size of possible extension queue 36199. Compared 15309365 event pairs, 1041105 based on Foata normal form. 114354/992075 useless extension candidates. Maximal degree in co-relation 2918812. Up to 1482802 conditions per place. [2022-12-13 21:00:55,491 INFO L137 encePairwiseOnDemand]: 867/899 looper letters, 126 selfloop transitions, 0 changer transitions 0/163 dead transitions. [2022-12-13 21:00:55,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 163 transitions, 620 flow [2022-12-13 21:00:55,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 21:00:55,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 21:00:55,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1030 transitions. [2022-12-13 21:00:55,507 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5728587319243604 [2022-12-13 21:00:55,507 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1030 transitions. [2022-12-13 21:00:55,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1030 transitions. [2022-12-13 21:00:55,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:00:55,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1030 transitions. [2022-12-13 21:00:55,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 515.0) internal successors, (1030), 2 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:00:55,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 899.0) internal successors, (2697), 3 states have internal predecessors, (2697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:00:55,524 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 899.0) internal successors, (2697), 3 states have internal predecessors, (2697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:00:55,526 INFO L175 Difference]: Start difference. First operand has 166 places, 197 transitions, 436 flow. Second operand 2 states and 1030 transitions. [2022-12-13 21:00:55,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 163 transitions, 620 flow [2022-12-13 21:00:56,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 163 transitions, 620 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 21:00:56,053 INFO L231 Difference]: Finished difference. Result has 157 places, 163 transitions, 368 flow [2022-12-13 21:00:56,054 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=368, PETRI_PLACES=157, PETRI_TRANSITIONS=163} [2022-12-13 21:00:56,056 INFO L288 CegarLoopForPetriNet]: 166 programPoint places, -9 predicate places. [2022-12-13 21:00:56,057 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 163 transitions, 368 flow [2022-12-13 21:00:56,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 436.5) internal successors, (873), 2 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:00:56,057 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:00:56,057 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 21:00:56,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 21:00:56,058 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 111 more)] === [2022-12-13 21:00:56,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:00:56,058 INFO L85 PathProgramCache]: Analyzing trace with hash 58904, now seen corresponding path program 1 times [2022-12-13 21:00:56,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:00:56,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965413066] [2022-12-13 21:00:56,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:00:56,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:00:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:00:56,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:00:56,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:00:56,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965413066] [2022-12-13 21:00:56,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965413066] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:00:56,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:00:56,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:00:56,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759723575] [2022-12-13 21:00:56,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:00:56,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:00:56,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:00:56,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:00:56,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:00:56,334 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 426 out of 899 [2022-12-13 21:00:56,335 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 163 transitions, 368 flow. Second operand has 3 states, 3 states have (on average 426.6666666666667) internal successors, (1280), 3 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:00:56,335 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:00:56,335 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 426 of 899 [2022-12-13 21:00:56,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:02:32,959 INFO L130 PetriNetUnfolder]: 1080039/1556772 cut-off events. [2022-12-13 21:02:32,959 INFO L131 PetriNetUnfolder]: For 9086/9086 co-relation queries the response was YES. [2022-12-13 21:02:35,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3003428 conditions, 1556772 events. 1080039/1556772 cut-off events. For 9086/9086 co-relation queries the response was YES. Maximal size of possible extension queue 35010. Compared 14675132 event pairs, 833003 based on Foata normal form. 0/851172 useless extension candidates. Maximal degree in co-relation 3003422. Up to 1189889 conditions per place. [2022-12-13 21:02:40,679 INFO L137 encePairwiseOnDemand]: 895/899 looper letters, 187 selfloop transitions, 2 changer transitions 0/226 dead transitions. [2022-12-13 21:02:40,679 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 226 transitions, 872 flow [2022-12-13 21:02:40,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:02:40,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:02:40,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1469 transitions. [2022-12-13 21:02:40,683 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5446792732665925 [2022-12-13 21:02:40,683 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1469 transitions. [2022-12-13 21:02:40,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1469 transitions. [2022-12-13 21:02:40,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:02:40,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1469 transitions. [2022-12-13 21:02:40,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 489.6666666666667) internal successors, (1469), 3 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:02:40,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 899.0) internal successors, (3596), 4 states have internal predecessors, (3596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:02:40,692 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 899.0) internal successors, (3596), 4 states have internal predecessors, (3596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:02:40,692 INFO L175 Difference]: Start difference. First operand has 157 places, 163 transitions, 368 flow. Second operand 3 states and 1469 transitions. [2022-12-13 21:02:40,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 226 transitions, 872 flow [2022-12-13 21:02:41,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 226 transitions, 872 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 21:02:41,030 INFO L231 Difference]: Finished difference. Result has 157 places, 161 transitions, 368 flow [2022-12-13 21:02:41,031 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=368, PETRI_PLACES=157, PETRI_TRANSITIONS=161} [2022-12-13 21:02:41,031 INFO L288 CegarLoopForPetriNet]: 166 programPoint places, -9 predicate places. [2022-12-13 21:02:41,031 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 161 transitions, 368 flow [2022-12-13 21:02:41,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 426.6666666666667) internal successors, (1280), 3 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:02:41,032 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:02:41,032 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 21:02:41,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 21:02:41,032 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 111 more)] === [2022-12-13 21:02:41,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:02:41,033 INFO L85 PathProgramCache]: Analyzing trace with hash 58905, now seen corresponding path program 1 times [2022-12-13 21:02:41,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:02:41,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247332853] [2022-12-13 21:02:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:02:41,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:02:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:02:41,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:02:41,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:02:41,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247332853] [2022-12-13 21:02:41,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247332853] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:02:41,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:02:41,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 21:02:41,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719080035] [2022-12-13 21:02:41,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:02:41,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:02:41,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:02:41,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:02:41,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:02:41,281 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 428 out of 899 [2022-12-13 21:02:41,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 161 transitions, 368 flow. Second operand has 3 states, 3 states have (on average 428.6666666666667) internal successors, (1286), 3 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:02:41,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:02:41,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 428 of 899 [2022-12-13 21:02:41,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:04:19,874 INFO L130 PetriNetUnfolder]: 1056069/1519258 cut-off events. [2022-12-13 21:04:19,874 INFO L131 PetriNetUnfolder]: For 14625/14625 co-relation queries the response was YES. [2022-12-13 21:04:22,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2939202 conditions, 1519258 events. 1056069/1519258 cut-off events. For 14625/14625 co-relation queries the response was YES. Maximal size of possible extension queue 33089. Compared 14165283 event pairs, 989002 based on Foata normal form. 0/844794 useless extension candidates. Maximal degree in co-relation 2939195. Up to 1403527 conditions per place. [2022-12-13 21:04:27,805 INFO L137 encePairwiseOnDemand]: 894/899 looper letters, 124 selfloop transitions, 3 changer transitions 0/164 dead transitions. [2022-12-13 21:04:27,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 164 transitions, 628 flow [2022-12-13 21:04:27,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:04:27,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:04:27,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1413 transitions. [2022-12-13 21:04:27,809 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5239154616240267 [2022-12-13 21:04:27,809 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1413 transitions. [2022-12-13 21:04:27,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1413 transitions. [2022-12-13 21:04:27,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:04:27,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1413 transitions. [2022-12-13 21:04:27,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 471.0) internal successors, (1413), 3 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:04:27,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 899.0) internal successors, (3596), 4 states have internal predecessors, (3596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:04:27,816 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 899.0) internal successors, (3596), 4 states have internal predecessors, (3596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:04:27,816 INFO L175 Difference]: Start difference. First operand has 157 places, 161 transitions, 368 flow. Second operand 3 states and 1413 transitions. [2022-12-13 21:04:27,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 164 transitions, 628 flow [2022-12-13 21:04:44,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 164 transitions, 624 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 21:04:44,510 INFO L231 Difference]: Finished difference. Result has 158 places, 163 transitions, 385 flow [2022-12-13 21:04:44,510 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=899, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=385, PETRI_PLACES=158, PETRI_TRANSITIONS=163} [2022-12-13 21:04:44,510 INFO L288 CegarLoopForPetriNet]: 166 programPoint places, -8 predicate places. [2022-12-13 21:04:44,511 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 163 transitions, 385 flow [2022-12-13 21:04:44,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 428.6666666666667) internal successors, (1286), 3 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:04:44,511 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:04:44,511 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 21:04:44,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 21:04:44,511 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 111 more)] === [2022-12-13 21:04:44,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:04:44,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1756256273, now seen corresponding path program 1 times [2022-12-13 21:04:44,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:04:44,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28933522] [2022-12-13 21:04:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:04:44,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:04:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:04:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:04:44,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:04:44,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28933522] [2022-12-13 21:04:44,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28933522] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:04:44,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494402771] [2022-12-13 21:04:44,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:04:44,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:04:44,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd4e77d-18b6-4a98-9ff8-3a00109d9152/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:04:44,607 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd4e77d-18b6-4a98-9ff8-3a00109d9152/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:04:44,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cd4e77d-18b6-4a98-9ff8-3a00109d9152/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 21:04:44,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:04:44,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 21:04:44,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:04:44,748 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 21:04:44,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-12-13 21:04:44,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:04:44,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:04:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:04:44,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494402771] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:04:44,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:04:44,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-12-13 21:04:44,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250634601] [2022-12-13 21:04:44,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:04:44,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 21:04:44,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:04:44,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 21:04:44,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 21:04:45,310 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 423 out of 899 [2022-12-13 21:04:45,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 163 transitions, 385 flow. Second operand has 7 states, 7 states have (on average 424.7142857142857) internal successors, (2973), 7 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:04:45,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:04:45,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 423 of 899 [2022-12-13 21:04:45,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand