./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa --- 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-5e519f3 [2022-11-02 21:05:27,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:05:27,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:05:27,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:05:27,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:05:27,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:05:27,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:05:27,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:05:27,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:05:27,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:05:27,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:05:27,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:05:27,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:05:27,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:05:27,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:05:27,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:05:27,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:05:27,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:05:27,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:05:27,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:05:27,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:05:27,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:05:27,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:05:27,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:05:27,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:05:27,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:05:27,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:05:27,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:05:27,554 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:05:27,555 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:05:27,556 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:05:27,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:05:27,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:05:27,558 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:05:27,559 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:05:27,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:05:27,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:05:27,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:05:27,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:05:27,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:05:27,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:05:27,563 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:05:27,587 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:05:27,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:05:27,588 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:05:27,588 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:05:27,589 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:05:27,589 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:05:27,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:05:27,590 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:05:27,590 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:05:27,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:05:27,590 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:05:27,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:05:27,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:05:27,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:05:27,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:05:27,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:05:27,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:05:27,592 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:05:27,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:05:27,592 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:05:27,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:05:27,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:05:27,593 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:05:27,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:05:27,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:05:27,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:05:27,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:05:27,594 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:05:27,594 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:05:27,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:05:27,594 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:05:27,595 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:05:27,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:05:27,595 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b86d528cae3f36fe49030118864df9a90bfa303271cb05b13ff89a15d513aa [2022-11-02 21:05:27,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:05:27,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:05:27,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:05:27,882 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:05:27,893 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:05:27,894 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2022-11-02 21:05:27,974 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/data/7d3998d16/895f7429a5ec42fab53478a66e3e7944/FLAG7083a9d42 [2022-11-02 21:05:28,623 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:05:28,624 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2022-11-02 21:05:28,638 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/data/7d3998d16/895f7429a5ec42fab53478a66e3e7944/FLAG7083a9d42 [2022-11-02 21:05:28,862 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/data/7d3998d16/895f7429a5ec42fab53478a66e3e7944 [2022-11-02 21:05:28,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:05:28,870 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:05:28,874 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:05:28,874 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:05:28,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:05:28,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:05:28" (1/1) ... [2022-11-02 21:05:28,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f477dc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:28, skipping insertion in model container [2022-11-02 21:05:28,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:05:28" (1/1) ... [2022-11-02 21:05:28,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:05:28,939 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:05:29,468 WARN L230 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_25cd4024-7942-4a5c-b65e-89c373fe7547/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] [2022-11-02 21:05:29,507 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:05:29,585 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:05:29,639 WARN L230 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_25cd4024-7942-4a5c-b65e-89c373fe7547/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i[47038,47051] [2022-11-02 21:05:29,672 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:05:29,754 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:05:29,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:29 WrapperNode [2022-11-02 21:05:29,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:05:29,756 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:05:29,756 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:05:29,757 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:05:29,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:29" (1/1) ... [2022-11-02 21:05:29,803 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:29" (1/1) ... [2022-11-02 21:05:29,851 INFO L138 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 224 [2022-11-02 21:05:29,851 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:05:29,859 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:05:29,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:05:29,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:05:29,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:29" (1/1) ... [2022-11-02 21:05:29,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:29" (1/1) ... [2022-11-02 21:05:29,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:29" (1/1) ... [2022-11-02 21:05:29,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:29" (1/1) ... [2022-11-02 21:05:29,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:29" (1/1) ... [2022-11-02 21:05:29,889 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:29" (1/1) ... [2022-11-02 21:05:29,892 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:29" (1/1) ... [2022-11-02 21:05:29,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:29" (1/1) ... [2022-11-02 21:05:29,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:05:29,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:05:29,899 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:05:29,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:05:29,900 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:29" (1/1) ... [2022-11-02 21:05:29,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:05:29,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:29,957 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:05:29,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:05:30,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 21:05:30,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 21:05:30,006 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-11-02 21:05:30,007 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-11-02 21:05:30,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 21:05:30,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 21:05:30,007 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-11-02 21:05:30,009 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-11-02 21:05:30,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 21:05:30,010 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-02 21:05:30,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 21:05:30,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:05:30,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 21:05:30,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:05:30,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:05:30,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:05:30,013 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 21:05:30,212 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:05:30,216 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:05:30,656 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:05:30,665 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:05:30,665 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-02 21:05:30,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:05:30 BoogieIcfgContainer [2022-11-02 21:05:30,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:05:30,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:05:30,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:05:30,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:05:30,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:05:28" (1/3) ... [2022-11-02 21:05:30,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f445f6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:05:30, skipping insertion in model container [2022-11-02 21:05:30,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:29" (2/3) ... [2022-11-02 21:05:30,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f445f6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:05:30, skipping insertion in model container [2022-11-02 21:05:30,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:05:30" (3/3) ... [2022-11-02 21:05:30,677 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree.i [2022-11-02 21:05:30,685 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 21:05:30,712 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:05:30,712 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:05:30,712 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 21:05:30,926 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-02 21:05:30,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 238 transitions, 498 flow [2022-11-02 21:05:31,173 INFO L130 PetriNetUnfolder]: 54/440 cut-off events. [2022-11-02 21:05:31,174 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-11-02 21:05:31,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 440 events. 54/440 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1779 event pairs, 0 based on Foata normal form. 0/376 useless extension candidates. Maximal degree in co-relation 226. Up to 8 conditions per place. [2022-11-02 21:05:31,183 INFO L82 GeneralOperation]: Start removeDead. Operand has 218 places, 238 transitions, 498 flow [2022-11-02 21:05:31,190 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 218 places, 236 transitions, 488 flow [2022-11-02 21:05:31,201 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:05:31,208 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@5555b248, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:05:31,209 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-02 21:05:31,232 INFO L130 PetriNetUnfolder]: 11/133 cut-off events. [2022-11-02 21:05:31,232 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-02 21:05:31,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:05:31,233 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:31,234 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 21:05:31,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:31,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1000804867, now seen corresponding path program 1 times [2022-11-02 21:05:31,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:31,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323392144] [2022-11-02 21:05:31,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:31,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 21:05:31,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:31,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323392144] [2022-11-02 21:05:31,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323392144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:31,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:31,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:05:31,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260475114] [2022-11-02 21:05:31,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:31,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 21:05:31,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:31,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 21:05:31,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 21:05:31,599 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 238 [2022-11-02 21:05:31,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 236 transitions, 488 flow. Second operand has 2 states, 2 states have (on average 215.0) internal successors, (430), 2 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:31,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:05:31,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 238 [2022-11-02 21:05:31,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:05:31,773 INFO L130 PetriNetUnfolder]: 11/387 cut-off events. [2022-11-02 21:05:31,774 INFO L131 PetriNetUnfolder]: For 18/27 co-relation queries the response was YES. [2022-11-02 21:05:31,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 387 events. 11/387 cut-off events. For 18/27 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1467 event pairs, 0 based on Foata normal form. 55/417 useless extension candidates. Maximal degree in co-relation 194. Up to 8 conditions per place. [2022-11-02 21:05:31,782 INFO L137 encePairwiseOnDemand]: 221/238 looper letters, 4 selfloop transitions, 0 changer transitions 0/218 dead transitions. [2022-11-02 21:05:31,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 218 transitions, 460 flow [2022-11-02 21:05:31,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 21:05:31,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 21:05:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 449 transitions. [2022-11-02 21:05:31,807 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9432773109243697 [2022-11-02 21:05:31,808 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 449 transitions. [2022-11-02 21:05:31,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 449 transitions. [2022-11-02 21:05:31,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:05:31,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 449 transitions. [2022-11-02 21:05:31,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 224.5) internal successors, (449), 2 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:31,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:31,827 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:31,829 INFO L175 Difference]: Start difference. First operand has 218 places, 236 transitions, 488 flow. Second operand 2 states and 449 transitions. [2022-11-02 21:05:31,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 218 transitions, 460 flow [2022-11-02 21:05:31,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 218 transitions, 460 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 21:05:31,847 INFO L231 Difference]: Finished difference. Result has 218 places, 218 transitions, 452 flow [2022-11-02 21:05:31,849 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=452, PETRI_PLACES=218, PETRI_TRANSITIONS=218} [2022-11-02 21:05:31,853 INFO L287 CegarLoopForPetriNet]: 218 programPoint places, 0 predicate places. [2022-11-02 21:05:31,853 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 218 transitions, 452 flow [2022-11-02 21:05:31,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 215.0) internal successors, (430), 2 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:31,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:05:31,854 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:31,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:05:31,855 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 21:05:31,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:31,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1997877220, now seen corresponding path program 1 times [2022-11-02 21:05:31,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:31,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289478335] [2022-11-02 21:05:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:31,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 21:05:32,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:32,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289478335] [2022-11-02 21:05:32,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289478335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:32,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:32,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:05:32,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333249799] [2022-11-02 21:05:32,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:32,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:05:32,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:32,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:05:32,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:05:32,041 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 238 [2022-11-02 21:05:32,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 218 transitions, 452 flow. Second operand has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:32,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:05:32,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 238 [2022-11-02 21:05:32,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:05:32,175 INFO L130 PetriNetUnfolder]: 11/402 cut-off events. [2022-11-02 21:05:32,176 INFO L131 PetriNetUnfolder]: For 18/27 co-relation queries the response was YES. [2022-11-02 21:05:32,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 402 events. 11/402 cut-off events. For 18/27 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1460 event pairs, 0 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 435. Up to 16 conditions per place. [2022-11-02 21:05:32,180 INFO L137 encePairwiseOnDemand]: 235/238 looper letters, 15 selfloop transitions, 2 changer transitions 0/223 dead transitions. [2022-11-02 21:05:32,181 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 223 transitions, 496 flow [2022-11-02 21:05:32,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:05:32,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 21:05:32,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 636 transitions. [2022-11-02 21:05:32,185 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8907563025210085 [2022-11-02 21:05:32,185 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 636 transitions. [2022-11-02 21:05:32,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 636 transitions. [2022-11-02 21:05:32,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:05:32,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 636 transitions. [2022-11-02 21:05:32,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:32,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:32,195 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:32,195 INFO L175 Difference]: Start difference. First operand has 218 places, 218 transitions, 452 flow. Second operand 3 states and 636 transitions. [2022-11-02 21:05:32,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 223 transitions, 496 flow [2022-11-02 21:05:32,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 223 transitions, 496 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 21:05:32,207 INFO L231 Difference]: Finished difference. Result has 221 places, 219 transitions, 464 flow [2022-11-02 21:05:32,208 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=464, PETRI_PLACES=221, PETRI_TRANSITIONS=219} [2022-11-02 21:05:32,209 INFO L287 CegarLoopForPetriNet]: 218 programPoint places, 3 predicate places. [2022-11-02 21:05:32,210 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 219 transitions, 464 flow [2022-11-02 21:05:32,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:32,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:05:32,211 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:32,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 21:05:32,213 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 21:05:32,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:32,215 INFO L85 PathProgramCache]: Analyzing trace with hash -787589799, now seen corresponding path program 1 times [2022-11-02 21:05:32,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:32,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790441428] [2022-11-02 21:05:32,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:32,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:32,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 21:05:32,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:32,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790441428] [2022-11-02 21:05:32,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790441428] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:32,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721618140] [2022-11-02 21:05:32,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:32,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:32,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:32,474 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:32,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:05:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:32,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:05:32,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 21:05:32,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 21:05:32,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721618140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:32,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:05:32,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-02 21:05:32,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402077327] [2022-11-02 21:05:32,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:32,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:05:32,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:32,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:05:32,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:05:32,901 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 238 [2022-11-02 21:05:32,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 219 transitions, 464 flow. Second operand has 10 states, 10 states have (on average 207.4) internal successors, (2074), 10 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:32,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:05:32,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 238 [2022-11-02 21:05:32,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:05:33,120 INFO L130 PetriNetUnfolder]: 11/420 cut-off events. [2022-11-02 21:05:33,120 INFO L131 PetriNetUnfolder]: For 19/28 co-relation queries the response was YES. [2022-11-02 21:05:33,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 475 conditions, 420 events. 11/420 cut-off events. For 19/28 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1394 event pairs, 0 based on Foata normal form. 2/398 useless extension candidates. Maximal degree in co-relation 468. Up to 12 conditions per place. [2022-11-02 21:05:33,125 INFO L137 encePairwiseOnDemand]: 232/238 looper letters, 17 selfloop transitions, 9 changer transitions 0/231 dead transitions. [2022-11-02 21:05:33,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 231 transitions, 542 flow [2022-11-02 21:05:33,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:05:33,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 21:05:33,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1873 transitions. [2022-11-02 21:05:33,131 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8744164332399627 [2022-11-02 21:05:33,131 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1873 transitions. [2022-11-02 21:05:33,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1873 transitions. [2022-11-02 21:05:33,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:05:33,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1873 transitions. [2022-11-02 21:05:33,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 208.11111111111111) internal successors, (1873), 9 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:33,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 238.0) internal successors, (2380), 10 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:33,144 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 238.0) internal successors, (2380), 10 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:33,144 INFO L175 Difference]: Start difference. First operand has 221 places, 219 transitions, 464 flow. Second operand 9 states and 1873 transitions. [2022-11-02 21:05:33,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 231 transitions, 542 flow [2022-11-02 21:05:33,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 231 transitions, 540 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 21:05:33,151 INFO L231 Difference]: Finished difference. Result has 231 places, 225 transitions, 512 flow [2022-11-02 21:05:33,151 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=512, PETRI_PLACES=231, PETRI_TRANSITIONS=225} [2022-11-02 21:05:33,154 INFO L287 CegarLoopForPetriNet]: 218 programPoint places, 13 predicate places. [2022-11-02 21:05:33,154 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 225 transitions, 512 flow [2022-11-02 21:05:33,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 207.4) internal successors, (2074), 10 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:33,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:05:33,156 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:33,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:33,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:33,375 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 21:05:33,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:33,375 INFO L85 PathProgramCache]: Analyzing trace with hash -113700397, now seen corresponding path program 2 times [2022-11-02 21:05:33,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:33,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440739965] [2022-11-02 21:05:33,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:33,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 21:05:33,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:33,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440739965] [2022-11-02 21:05:33,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440739965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:33,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359444993] [2022-11-02 21:05:33,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:05:33,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:33,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:33,740 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:33,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:05:33,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:05:33,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:05:33,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 21:05:33,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:34,037 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 21:05:34,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:34,192 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 21:05:34,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359444993] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:34,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:05:34,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-02 21:05:34,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984448371] [2022-11-02 21:05:34,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:34,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 21:05:34,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:34,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 21:05:34,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-02 21:05:34,210 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 238 [2022-11-02 21:05:34,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 225 transitions, 512 flow. Second operand has 18 states, 18 states have (on average 207.66666666666666) internal successors, (3738), 18 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:34,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:05:34,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 238 [2022-11-02 21:05:34,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:05:34,585 INFO L130 PetriNetUnfolder]: 11/484 cut-off events. [2022-11-02 21:05:34,586 INFO L131 PetriNetUnfolder]: For 39/48 co-relation queries the response was YES. [2022-11-02 21:05:34,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612 conditions, 484 events. 11/484 cut-off events. For 39/48 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1383 event pairs, 0 based on Foata normal form. 4/464 useless extension candidates. Maximal degree in co-relation 603. Up to 12 conditions per place. [2022-11-02 21:05:34,590 INFO L137 encePairwiseOnDemand]: 232/238 looper letters, 29 selfloop transitions, 21 changer transitions 0/255 dead transitions. [2022-11-02 21:05:34,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 255 transitions, 732 flow [2022-11-02 21:05:34,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 21:05:34,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-02 21:05:34,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4359 transitions. [2022-11-02 21:05:34,600 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8721488595438175 [2022-11-02 21:05:34,600 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4359 transitions. [2022-11-02 21:05:34,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4359 transitions. [2022-11-02 21:05:34,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:05:34,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4359 transitions. [2022-11-02 21:05:34,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 207.57142857142858) internal successors, (4359), 21 states have internal predecessors, (4359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:34,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 238.0) internal successors, (5236), 22 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:34,627 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 238.0) internal successors, (5236), 22 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:34,627 INFO L175 Difference]: Start difference. First operand has 231 places, 225 transitions, 512 flow. Second operand 21 states and 4359 transitions. [2022-11-02 21:05:34,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 255 transitions, 732 flow [2022-11-02 21:05:34,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 255 transitions, 718 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-02 21:05:34,635 INFO L231 Difference]: Finished difference. Result has 255 places, 238 transitions, 636 flow [2022-11-02 21:05:34,636 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=636, PETRI_PLACES=255, PETRI_TRANSITIONS=238} [2022-11-02 21:05:34,636 INFO L287 CegarLoopForPetriNet]: 218 programPoint places, 37 predicate places. [2022-11-02 21:05:34,637 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 238 transitions, 636 flow [2022-11-02 21:05:34,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 207.66666666666666) internal successors, (3738), 18 states have internal predecessors, (3738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:34,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:05:34,639 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:34,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:34,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-02 21:05:34,865 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 21:05:34,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:34,865 INFO L85 PathProgramCache]: Analyzing trace with hash -506637625, now seen corresponding path program 3 times [2022-11-02 21:05:34,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:34,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664280947] [2022-11-02 21:05:34,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:34,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 21:05:35,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:35,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664280947] [2022-11-02 21:05:35,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664280947] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:35,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18029319] [2022-11-02 21:05:35,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:05:35,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:35,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:35,792 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:35,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25cd4024-7942-4a5c-b65e-89c373fe7547/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process