./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56ab87fb-4052-41ba-9f13-0145da4686aa/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56ab87fb-4052-41ba-9f13-0145da4686aa/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56ab87fb-4052-41ba-9f13-0145da4686aa/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56ab87fb-4052-41ba-9f13-0145da4686aa/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56ab87fb-4052-41ba-9f13-0145da4686aa/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56ab87fb-4052-41ba-9f13-0145da4686aa/bin/uautomizer-J5u9QxTXDZ --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 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 --- 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-dbf71c6-m [2022-10-17 10:17:02,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:17:02,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:17:02,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:17:02,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:17:02,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:17:02,283 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:17:02,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:17:02,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:17:02,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:17:02,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:17:02,297 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:17:02,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:17:02,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:17:02,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:17:02,305 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:17:02,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:17:02,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:17:02,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:17:02,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:17:02,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:17:02,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:17:02,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:17:02,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:17:02,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:17:02,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:17:02,323 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:17:02,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:17:02,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:17:02,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:17:02,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:17:02,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:17:02,328 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:17:02,329 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:17:02,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:17:02,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:17:02,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:17:02,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:17:02,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:17:02,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:17:02,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:17:02,335 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56ab87fb-4052-41ba-9f13-0145da4686aa/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:17:02,361 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:17:02,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:17:02,363 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:17:02,363 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:17:02,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:17:02,364 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:17:02,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:17:02,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:17:02,366 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:17:02,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:17:02,367 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:17:02,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:17:02,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:17:02,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:17:02,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:17:02,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:17:02,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:17:02,369 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:17:02,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:17:02,369 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:17:02,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:17:02,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:17:02,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:17:02,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:17:02,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:17:02,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:17:02,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:17:02,372 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:17:02,372 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:17:02,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:17:02,373 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:17:02,373 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:17:02,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:17:02,374 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_56ab87fb-4052-41ba-9f13-0145da4686aa/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56ab87fb-4052-41ba-9f13-0145da4686aa/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31f5db4bc5916150a86a586587dbeca1bc7aa37b414274f5dc02856908270171 [2022-10-17 10:17:02,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:17:02,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:17:02,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:17:02,671 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:17:02,672 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:17:02,673 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56ab87fb-4052-41ba-9f13-0145da4686aa/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i [2022-10-17 10:17:02,731 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56ab87fb-4052-41ba-9f13-0145da4686aa/bin/uautomizer-J5u9QxTXDZ/data/46ecefb94/1f361da521a044fbb4ed471629672b4e/FLAG5bf6e8acb [2022-10-17 10:17:03,294 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:17:03,297 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56ab87fb-4052-41ba-9f13-0145da4686aa/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i [2022-10-17 10:17:03,315 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56ab87fb-4052-41ba-9f13-0145da4686aa/bin/uautomizer-J5u9QxTXDZ/data/46ecefb94/1f361da521a044fbb4ed471629672b4e/FLAG5bf6e8acb [2022-10-17 10:17:03,558 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56ab87fb-4052-41ba-9f13-0145da4686aa/bin/uautomizer-J5u9QxTXDZ/data/46ecefb94/1f361da521a044fbb4ed471629672b4e [2022-10-17 10:17:03,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:17:03,563 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:17:03,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:17:03,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:17:03,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:17:03,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:17:03" (1/1) ... [2022-10-17 10:17:03,580 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34466580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:03, skipping insertion in model container [2022-10-17 10:17:03,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:17:03" (1/1) ... [2022-10-17 10:17:03,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:17:03,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:17:03,912 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-10-17 10:17:04,101 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_56ab87fb-4052-41ba-9f13-0145da4686aa/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2022-10-17 10:17:04,112 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:17:04,120 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:17:04,145 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-10-17 10:17:04,180 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_56ab87fb-4052-41ba-9f13-0145da4686aa/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs.i[30893,30906] [2022-10-17 10:17:04,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:17:04,235 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:17:04,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:04 WrapperNode [2022-10-17 10:17:04,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:17:04,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:17:04,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:17:04,238 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:17:04,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:04" (1/1) ... [2022-10-17 10:17:04,280 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:04" (1/1) ... [2022-10-17 10:17:04,312 INFO L138 Inliner]: procedures = 173, calls = 24, calls flagged for inlining = 5, calls inlined = 7, statements flattened = 108 [2022-10-17 10:17:04,312 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:17:04,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:17:04,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:17:04,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:17:04,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:04" (1/1) ... [2022-10-17 10:17:04,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:04" (1/1) ... [2022-10-17 10:17:04,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:04" (1/1) ... [2022-10-17 10:17:04,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:04" (1/1) ... [2022-10-17 10:17:04,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:04" (1/1) ... [2022-10-17 10:17:04,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:04" (1/1) ... [2022-10-17 10:17:04,358 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:04" (1/1) ... [2022-10-17 10:17:04,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:04" (1/1) ... [2022-10-17 10:17:04,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:17:04,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:17:04,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:17:04,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:17:04,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:04" (1/1) ... [2022-10-17 10:17:04,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:17:04,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56ab87fb-4052-41ba-9f13-0145da4686aa/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:17:04,412 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56ab87fb-4052-41ba-9f13-0145da4686aa/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:17:04,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56ab87fb-4052-41ba-9f13-0145da4686aa/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:17:04,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:17:04,458 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-10-17 10:17:04,459 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-10-17 10:17:04,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:17:04,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-10-17 10:17:04,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:17:04,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:17:04,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:17:04,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:17:04,460 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-10-17 10:17:04,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:17:04,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:17:04,462 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 10:17:04,660 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:17:04,662 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:17:04,848 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:17:04,949 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:17:04,950 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-17 10:17:04,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:17:04 BoogieIcfgContainer [2022-10-17 10:17:04,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:17:04,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:17:04,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:17:04,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:17:04,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:17:03" (1/3) ... [2022-10-17 10:17:04,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5497c9b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:17:04, skipping insertion in model container [2022-10-17 10:17:04,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:17:04" (2/3) ... [2022-10-17 10:17:04,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5497c9b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:17:04, skipping insertion in model container [2022-10-17 10:17:04,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:17:04" (3/3) ... [2022-10-17 10:17:04,968 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs.i [2022-10-17 10:17:04,976 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 10:17:04,987 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:17:04,987 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-10-17 10:17:04,987 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 10:17:05,100 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 10:17:05,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 75 transitions, 155 flow [2022-10-17 10:17:05,242 INFO L130 PetriNetUnfolder]: 8/113 cut-off events. [2022-10-17 10:17:05,242 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 10:17:05,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 113 events. 8/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 209 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 57. Up to 4 conditions per place. [2022-10-17 10:17:05,247 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 75 transitions, 155 flow [2022-10-17 10:17:05,252 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 75 transitions, 155 flow [2022-10-17 10:17:05,263 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:17:05,270 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;@18f46503, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:17:05,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-10-17 10:17:05,286 INFO L130 PetriNetUnfolder]: 4/54 cut-off events. [2022-10-17 10:17:05,286 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 10:17:05,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:05,287 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2022-10-17 10:17:05,288 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 10:17:05,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:05,294 INFO L85 PathProgramCache]: Analyzing trace with hash 24858482, now seen corresponding path program 1 times [2022-10-17 10:17:05,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:05,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455556341] [2022-10-17 10:17:05,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:05,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:05,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:05,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:05,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455556341] [2022-10-17 10:17:05,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455556341] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:17:05,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:17:05,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:17:05,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210963107] [2022-10-17 10:17:05,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:17:05,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:17:05,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:05,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:17:05,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:17:05,650 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 75 [2022-10-17 10:17:05,654 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 155 flow. Second operand has 2 states, 2 states have (on average 62.5) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:05,654 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:05,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 75 [2022-10-17 10:17:05,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:05,773 INFO L130 PetriNetUnfolder]: 18/173 cut-off events. [2022-10-17 10:17:05,780 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 10:17:05,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 173 events. 18/173 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 499 event pairs, 9 based on Foata normal form. 13/164 useless extension candidates. Maximal degree in co-relation 152. Up to 38 conditions per place. [2022-10-17 10:17:05,785 INFO L137 encePairwiseOnDemand]: 72/75 looper letters, 9 selfloop transitions, 0 changer transitions 0/70 dead transitions. [2022-10-17 10:17:05,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 70 transitions, 163 flow [2022-10-17 10:17:05,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:17:05,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-10-17 10:17:05,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 134 transitions. [2022-10-17 10:17:05,801 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8933333333333333 [2022-10-17 10:17:05,802 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 134 transitions. [2022-10-17 10:17:05,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 134 transitions. [2022-10-17 10:17:05,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:05,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 134 transitions. [2022-10-17 10:17:05,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 67.0) internal successors, (134), 2 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:05,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:05,820 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:05,822 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 155 flow. Second operand 2 states and 134 transitions. [2022-10-17 10:17:05,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 70 transitions, 163 flow [2022-10-17 10:17:05,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 70 transitions, 163 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:17:05,830 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 145 flow [2022-10-17 10:17:05,832 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=145, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2022-10-17 10:17:05,836 INFO L287 CegarLoopForPetriNet]: 73 programPoint places, -1 predicate places. [2022-10-17 10:17:05,836 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 145 flow [2022-10-17 10:17:05,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 62.5) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:05,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:05,837 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2022-10-17 10:17:05,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:17:05,838 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 10:17:05,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:05,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1969669199, now seen corresponding path program 1 times [2022-10-17 10:17:05,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:05,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195057780] [2022-10-17 10:17:05,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:05,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:06,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:06,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195057780] [2022-10-17 10:17:06,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195057780] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:17:06,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:17:06,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:17:06,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565292079] [2022-10-17 10:17:06,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:17:06,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:17:06,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:06,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:17:06,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:17:06,168 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 75 [2022-10-17 10:17:06,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:06,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:06,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 75 [2022-10-17 10:17:06,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:06,332 INFO L130 PetriNetUnfolder]: 57/297 cut-off events. [2022-10-17 10:17:06,332 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 10:17:06,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 297 events. 57/297 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1180 event pairs, 20 based on Foata normal form. 0/271 useless extension candidates. Maximal degree in co-relation 425. Up to 80 conditions per place. [2022-10-17 10:17:06,337 INFO L137 encePairwiseOnDemand]: 69/75 looper letters, 22 selfloop transitions, 4 changer transitions 6/84 dead transitions. [2022-10-17 10:17:06,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 84 transitions, 237 flow [2022-10-17 10:17:06,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:17:06,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:17:06,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 190 transitions. [2022-10-17 10:17:06,346 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8444444444444444 [2022-10-17 10:17:06,346 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 190 transitions. [2022-10-17 10:17:06,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 190 transitions. [2022-10-17 10:17:06,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:06,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 190 transitions. [2022-10-17 10:17:06,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:06,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:06,352 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 75.0) internal successors, (300), 4 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:06,352 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 145 flow. Second operand 3 states and 190 transitions. [2022-10-17 10:17:06,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 84 transitions, 237 flow [2022-10-17 10:17:06,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 84 transitions, 237 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:17:06,358 INFO L231 Difference]: Finished difference. Result has 76 places, 72 transitions, 173 flow [2022-10-17 10:17:06,358 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2022-10-17 10:17:06,359 INFO L287 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2022-10-17 10:17:06,360 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 173 flow [2022-10-17 10:17:06,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:06,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:06,361 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:17:06,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:17:06,362 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-10-17 10:17:06,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:06,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1114984198, now seen corresponding path program 1 times [2022-10-17 10:17:06,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:06,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977908808] [2022-10-17 10:17:06,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:06,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:17:06,390 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:17:06,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:17:06,435 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:17:06,436 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:17:06,439 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-10-17 10:17:06,441 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-10-17 10:17:06,442 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-10-17 10:17:06,443 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-10-17 10:17:06,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:17:06,443 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-10-17 10:17:06,447 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 10:17:06,448 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-10-17 10:17:06,473 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 10:17:06,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 93 transitions, 198 flow [2022-10-17 10:17:06,510 INFO L130 PetriNetUnfolder]: 13/171 cut-off events. [2022-10-17 10:17:06,510 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 10:17:06,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 171 events. 13/171 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 436 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 114. Up to 6 conditions per place. [2022-10-17 10:17:06,513 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 93 transitions, 198 flow [2022-10-17 10:17:06,515 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 93 transitions, 198 flow [2022-10-17 10:17:06,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:17:06,524 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;@18f46503, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:17:06,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-10-17 10:17:06,531 INFO L130 PetriNetUnfolder]: 4/53 cut-off events. [2022-10-17 10:17:06,532 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 10:17:06,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:06,533 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2022-10-17 10:17:06,533 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-10-17 10:17:06,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:06,536 INFO L85 PathProgramCache]: Analyzing trace with hash -403506638, now seen corresponding path program 1 times [2022-10-17 10:17:06,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:06,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088851905] [2022-10-17 10:17:06,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:06,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:06,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:06,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088851905] [2022-10-17 10:17:06,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088851905] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:17:06,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:17:06,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:17:06,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052573346] [2022-10-17 10:17:06,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:17:06,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:17:06,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:06,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:17:06,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:17:06,599 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 93 [2022-10-17 10:17:06,599 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 93 transitions, 198 flow. Second operand has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:06,599 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:06,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 93 [2022-10-17 10:17:06,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:06,758 INFO L130 PetriNetUnfolder]: 150/610 cut-off events. [2022-10-17 10:17:06,759 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-10-17 10:17:06,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 863 conditions, 610 events. 150/610 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3432 event pairs, 93 based on Foata normal form. 75/577 useless extension candidates. Maximal degree in co-relation 627. Up to 234 conditions per place. [2022-10-17 10:17:06,765 INFO L137 encePairwiseOnDemand]: 89/93 looper letters, 14 selfloop transitions, 0 changer transitions 0/86 dead transitions. [2022-10-17 10:17:06,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 212 flow [2022-10-17 10:17:06,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:17:06,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-10-17 10:17:06,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 162 transitions. [2022-10-17 10:17:06,768 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8709677419354839 [2022-10-17 10:17:06,768 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 162 transitions. [2022-10-17 10:17:06,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 162 transitions. [2022-10-17 10:17:06,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:06,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 162 transitions. [2022-10-17 10:17:06,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:06,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:06,773 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:06,773 INFO L175 Difference]: Start difference. First operand has 91 places, 93 transitions, 198 flow. Second operand 2 states and 162 transitions. [2022-10-17 10:17:06,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 212 flow [2022-10-17 10:17:06,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 86 transitions, 210 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-10-17 10:17:06,777 INFO L231 Difference]: Finished difference. Result has 89 places, 86 transitions, 182 flow [2022-10-17 10:17:06,778 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=89, PETRI_TRANSITIONS=86} [2022-10-17 10:17:06,781 INFO L287 CegarLoopForPetriNet]: 91 programPoint places, -2 predicate places. [2022-10-17 10:17:06,781 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 86 transitions, 182 flow [2022-10-17 10:17:06,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:06,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:06,782 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2022-10-17 10:17:06,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:17:06,782 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-10-17 10:17:06,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:06,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1667315025, now seen corresponding path program 1 times [2022-10-17 10:17:06,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:06,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262632764] [2022-10-17 10:17:06,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:06,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:06,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:06,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262632764] [2022-10-17 10:17:06,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262632764] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:17:06,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:17:06,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:17:06,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459920428] [2022-10-17 10:17:06,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:17:06,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:17:06,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:06,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:17:06,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:17:06,971 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 93 [2022-10-17 10:17:06,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 86 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:06,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:06,972 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 93 [2022-10-17 10:17:06,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:07,471 INFO L130 PetriNetUnfolder]: 1077/2533 cut-off events. [2022-10-17 10:17:07,471 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-10-17 10:17:07,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4273 conditions, 2533 events. 1077/2533 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 17442 event pairs, 352 based on Foata normal form. 0/2184 useless extension candidates. Maximal degree in co-relation 4268. Up to 1021 conditions per place. [2022-10-17 10:17:07,492 INFO L137 encePairwiseOnDemand]: 84/93 looper letters, 43 selfloop transitions, 6 changer transitions 0/108 dead transitions. [2022-10-17 10:17:07,492 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 108 transitions, 329 flow [2022-10-17 10:17:07,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:17:07,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:17:07,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 229 transitions. [2022-10-17 10:17:07,494 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8207885304659498 [2022-10-17 10:17:07,494 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 229 transitions. [2022-10-17 10:17:07,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 229 transitions. [2022-10-17 10:17:07,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:07,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 229 transitions. [2022-10-17 10:17:07,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:07,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:07,498 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:07,499 INFO L175 Difference]: Start difference. First operand has 89 places, 86 transitions, 182 flow. Second operand 3 states and 229 transitions. [2022-10-17 10:17:07,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 108 transitions, 329 flow [2022-10-17 10:17:07,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 108 transitions, 329 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:17:07,504 INFO L231 Difference]: Finished difference. Result has 93 places, 92 transitions, 236 flow [2022-10-17 10:17:07,505 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=93, PETRI_TRANSITIONS=92} [2022-10-17 10:17:07,506 INFO L287 CegarLoopForPetriNet]: 91 programPoint places, 2 predicate places. [2022-10-17 10:17:07,507 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 92 transitions, 236 flow [2022-10-17 10:17:07,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:07,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:07,508 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:17:07,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:17:07,508 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-10-17 10:17:07,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:07,509 INFO L85 PathProgramCache]: Analyzing trace with hash -767453885, now seen corresponding path program 1 times [2022-10-17 10:17:07,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:07,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609321062] [2022-10-17 10:17:07,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:07,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:17:07,539 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 10:17:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 10:17:07,573 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 10:17:07,576 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 10:17:07,580 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-10-17 10:17:07,581 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-10-17 10:17:07,581 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-10-17 10:17:07,581 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-10-17 10:17:07,582 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-10-17 10:17:07,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:17:07,582 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-10-17 10:17:07,583 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 10:17:07,583 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-10-17 10:17:07,627 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 10:17:07,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 111 transitions, 243 flow [2022-10-17 10:17:07,667 INFO L130 PetriNetUnfolder]: 18/229 cut-off events. [2022-10-17 10:17:07,668 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-10-17 10:17:07,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 229 events. 18/229 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 674 event pairs, 0 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 175. Up to 8 conditions per place. [2022-10-17 10:17:07,670 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 111 transitions, 243 flow [2022-10-17 10:17:07,674 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 111 transitions, 243 flow [2022-10-17 10:17:07,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:17:07,680 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;@18f46503, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:17:07,680 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-10-17 10:17:07,686 INFO L130 PetriNetUnfolder]: 4/54 cut-off events. [2022-10-17 10:17:07,686 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 10:17:07,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:07,687 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2022-10-17 10:17:07,687 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-10-17 10:17:07,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:07,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1301976178, now seen corresponding path program 1 times [2022-10-17 10:17:07,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:07,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695729798] [2022-10-17 10:17:07,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:07,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:07,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:07,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:07,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695729798] [2022-10-17 10:17:07,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695729798] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:17:07,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:17:07,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:17:07,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680614551] [2022-10-17 10:17:07,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:17:07,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:17:07,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:07,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:17:07,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:17:07,718 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 111 [2022-10-17 10:17:07,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 111 transitions, 243 flow. Second operand has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:07,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:07,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 111 [2022-10-17 10:17:07,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:08,185 INFO L130 PetriNetUnfolder]: 934/2551 cut-off events. [2022-10-17 10:17:08,185 INFO L131 PetriNetUnfolder]: For 112/112 co-relation queries the response was YES. [2022-10-17 10:17:08,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3910 conditions, 2551 events. 934/2551 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 19343 event pairs, 621 based on Foata normal form. 389/2446 useless extension candidates. Maximal degree in co-relation 2921. Up to 1274 conditions per place. [2022-10-17 10:17:08,217 INFO L137 encePairwiseOnDemand]: 106/111 looper letters, 19 selfloop transitions, 0 changer transitions 0/102 dead transitions. [2022-10-17 10:17:08,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 102 transitions, 263 flow [2022-10-17 10:17:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:17:08,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-10-17 10:17:08,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 190 transitions. [2022-10-17 10:17:08,219 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8558558558558559 [2022-10-17 10:17:08,219 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 190 transitions. [2022-10-17 10:17:08,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 190 transitions. [2022-10-17 10:17:08,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:08,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 190 transitions. [2022-10-17 10:17:08,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 95.0) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:08,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:08,221 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:08,221 INFO L175 Difference]: Start difference. First operand has 109 places, 111 transitions, 243 flow. Second operand 2 states and 190 transitions. [2022-10-17 10:17:08,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 102 transitions, 263 flow [2022-10-17 10:17:08,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 102 transitions, 257 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-10-17 10:17:08,224 INFO L231 Difference]: Finished difference. Result has 106 places, 102 transitions, 219 flow [2022-10-17 10:17:08,225 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=219, PETRI_PLACES=106, PETRI_TRANSITIONS=102} [2022-10-17 10:17:08,226 INFO L287 CegarLoopForPetriNet]: 109 programPoint places, -3 predicate places. [2022-10-17 10:17:08,226 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 102 transitions, 219 flow [2022-10-17 10:17:08,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:08,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:08,226 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2022-10-17 10:17:08,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 10:17:08,227 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-10-17 10:17:08,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:08,227 INFO L85 PathProgramCache]: Analyzing trace with hash -775515820, now seen corresponding path program 1 times [2022-10-17 10:17:08,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:08,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72890608] [2022-10-17 10:17:08,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:08,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:08,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:08,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:08,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72890608] [2022-10-17 10:17:08,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72890608] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:17:08,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:17:08,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:17:08,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343599357] [2022-10-17 10:17:08,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:17:08,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:17:08,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:08,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:17:08,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:17:08,308 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 111 [2022-10-17 10:17:08,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 102 transitions, 219 flow. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:08,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:08,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 111 [2022-10-17 10:17:08,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:12,476 INFO L130 PetriNetUnfolder]: 15145/26652 cut-off events. [2022-10-17 10:17:12,476 INFO L131 PetriNetUnfolder]: For 205/205 co-relation queries the response was YES. [2022-10-17 10:17:12,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47828 conditions, 26652 events. 15145/26652 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 1175. Compared 227322 event pairs, 5877 based on Foata normal form. 0/22805 useless extension candidates. Maximal degree in co-relation 47822. Up to 12218 conditions per place. [2022-10-17 10:17:12,703 INFO L137 encePairwiseOnDemand]: 99/111 looper letters, 58 selfloop transitions, 8 changer transitions 0/132 dead transitions. [2022-10-17 10:17:12,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 132 transitions, 421 flow [2022-10-17 10:17:12,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:17:12,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 10:17:12,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 268 transitions. [2022-10-17 10:17:12,705 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8048048048048048 [2022-10-17 10:17:12,705 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 268 transitions. [2022-10-17 10:17:12,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 268 transitions. [2022-10-17 10:17:12,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:12,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 268 transitions. [2022-10-17 10:17:12,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:12,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:12,709 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:12,710 INFO L175 Difference]: Start difference. First operand has 106 places, 102 transitions, 219 flow. Second operand 3 states and 268 transitions. [2022-10-17 10:17:12,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 132 transitions, 421 flow [2022-10-17 10:17:12,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 132 transitions, 421 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:17:12,715 INFO L231 Difference]: Finished difference. Result has 110 places, 110 transitions, 291 flow [2022-10-17 10:17:12,715 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=291, PETRI_PLACES=110, PETRI_TRANSITIONS=110} [2022-10-17 10:17:12,717 INFO L287 CegarLoopForPetriNet]: 109 programPoint places, 1 predicate places. [2022-10-17 10:17:12,717 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 110 transitions, 291 flow [2022-10-17 10:17:12,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:12,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:12,718 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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] [2022-10-17 10:17:12,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 10:17:12,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-10-17 10:17:12,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:12,720 INFO L85 PathProgramCache]: Analyzing trace with hash -915373184, now seen corresponding path program 1 times [2022-10-17 10:17:12,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:12,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365806293] [2022-10-17 10:17:12,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:12,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:12,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:13,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 10:17:13,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:13,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365806293] [2022-10-17 10:17:13,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365806293] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:17:13,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:17:13,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:17:13,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799934099] [2022-10-17 10:17:13,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:17:13,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:17:13,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:13,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:17:13,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:17:13,161 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 111 [2022-10-17 10:17:13,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 110 transitions, 291 flow. Second operand has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:13,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:13,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 111 [2022-10-17 10:17:13,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:14,804 INFO L130 PetriNetUnfolder]: 4513/11833 cut-off events. [2022-10-17 10:17:14,804 INFO L131 PetriNetUnfolder]: For 1409/1683 co-relation queries the response was YES. [2022-10-17 10:17:14,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21126 conditions, 11833 events. 4513/11833 cut-off events. For 1409/1683 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 124286 event pairs, 970 based on Foata normal form. 0/10498 useless extension candidates. Maximal degree in co-relation 21118. Up to 3938 conditions per place. [2022-10-17 10:17:14,908 INFO L137 encePairwiseOnDemand]: 99/111 looper letters, 64 selfloop transitions, 25 changer transitions 0/172 dead transitions. [2022-10-17 10:17:14,908 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 172 transitions, 623 flow [2022-10-17 10:17:14,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:17:14,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-10-17 10:17:14,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 540 transitions. [2022-10-17 10:17:14,911 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8108108108108109 [2022-10-17 10:17:14,911 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 540 transitions. [2022-10-17 10:17:14,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 540 transitions. [2022-10-17 10:17:14,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:14,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 540 transitions. [2022-10-17 10:17:14,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 90.0) internal successors, (540), 6 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:14,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 111.0) internal successors, (777), 7 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:14,917 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 111.0) internal successors, (777), 7 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:14,917 INFO L175 Difference]: Start difference. First operand has 110 places, 110 transitions, 291 flow. Second operand 6 states and 540 transitions. [2022-10-17 10:17:14,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 172 transitions, 623 flow [2022-10-17 10:17:14,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 172 transitions, 607 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-10-17 10:17:14,930 INFO L231 Difference]: Finished difference. Result has 116 places, 136 transitions, 430 flow [2022-10-17 10:17:14,931 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=430, PETRI_PLACES=116, PETRI_TRANSITIONS=136} [2022-10-17 10:17:14,932 INFO L287 CegarLoopForPetriNet]: 109 programPoint places, 7 predicate places. [2022-10-17 10:17:14,932 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 136 transitions, 430 flow [2022-10-17 10:17:14,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:14,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:14,933 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2022-10-17 10:17:14,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 10:17:14,933 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-10-17 10:17:14,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:14,934 INFO L85 PathProgramCache]: Analyzing trace with hash -696341705, now seen corresponding path program 1 times [2022-10-17 10:17:14,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:14,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610631308] [2022-10-17 10:17:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:14,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:15,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:15,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610631308] [2022-10-17 10:17:15,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610631308] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:17:15,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677211380] [2022-10-17 10:17:15,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:15,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:17:15,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56ab87fb-4052-41ba-9f13-0145da4686aa/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:17:15,360 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56ab87fb-4052-41ba-9f13-0145da4686aa/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:17:15,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56ab87fb-4052-41ba-9f13-0145da4686aa/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:17:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:15,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 29 conjunts are in the unsatisfiable core [2022-10-17 10:17:15,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:17:15,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 10:17:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:15,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:17:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:17:15,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677211380] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:17:15,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:17:15,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 14 [2022-10-17 10:17:15,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372906037] [2022-10-17 10:17:15,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:17:15,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:17:15,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:15,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:17:15,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:17:15,993 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 111 [2022-10-17 10:17:15,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 136 transitions, 430 flow. Second operand has 14 states, 14 states have (on average 59.57142857142857) internal successors, (834), 14 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:15,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:15,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 111 [2022-10-17 10:17:15,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:28,057 INFO L130 PetriNetUnfolder]: 43702/76305 cut-off events. [2022-10-17 10:17:28,057 INFO L131 PetriNetUnfolder]: For 24586/24667 co-relation queries the response was YES. [2022-10-17 10:17:28,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178632 conditions, 76305 events. 43702/76305 cut-off events. For 24586/24667 co-relation queries the response was YES. Maximal size of possible extension queue 2851. Compared 739633 event pairs, 3459 based on Foata normal form. 3336/74574 useless extension candidates. Maximal degree in co-relation 178621. Up to 12109 conditions per place. [2022-10-17 10:17:28,690 INFO L137 encePairwiseOnDemand]: 85/111 looper letters, 402 selfloop transitions, 277 changer transitions 0/736 dead transitions. [2022-10-17 10:17:28,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 736 transitions, 3854 flow [2022-10-17 10:17:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-10-17 10:17:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-10-17 10:17:28,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2651 transitions. [2022-10-17 10:17:28,703 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7024377318494965 [2022-10-17 10:17:28,703 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2651 transitions. [2022-10-17 10:17:28,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2651 transitions. [2022-10-17 10:17:28,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 10:17:28,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2651 transitions. [2022-10-17 10:17:28,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 77.97058823529412) internal successors, (2651), 34 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:28,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 111.0) internal successors, (3885), 35 states have internal predecessors, (3885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:28,920 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 111.0) internal successors, (3885), 35 states have internal predecessors, (3885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:28,920 INFO L175 Difference]: Start difference. First operand has 116 places, 136 transitions, 430 flow. Second operand 34 states and 2651 transitions. [2022-10-17 10:17:28,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 736 transitions, 3854 flow [2022-10-17 10:17:28,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 736 transitions, 3854 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 10:17:28,945 INFO L231 Difference]: Finished difference. Result has 176 places, 397 transitions, 2770 flow [2022-10-17 10:17:28,946 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=2770, PETRI_PLACES=176, PETRI_TRANSITIONS=397} [2022-10-17 10:17:28,948 INFO L287 CegarLoopForPetriNet]: 109 programPoint places, 67 predicate places. [2022-10-17 10:17:28,948 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 397 transitions, 2770 flow [2022-10-17 10:17:28,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 59.57142857142857) internal successors, (834), 14 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:28,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 10:17:28,950 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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] [2022-10-17 10:17:28,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56ab87fb-4052-41ba-9f13-0145da4686aa/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:17:29,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56ab87fb-4052-41ba-9f13-0145da4686aa/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:17:29,175 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-10-17 10:17:29,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:17:29,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2064953242, now seen corresponding path program 2 times [2022-10-17 10:17:29,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:17:29,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107797935] [2022-10-17 10:17:29,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:17:29,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:17:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:17:29,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 10:17:29,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:17:29,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107797935] [2022-10-17 10:17:29,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107797935] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:17:29,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:17:29,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:17:29,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247464121] [2022-10-17 10:17:29,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:17:29,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:17:29,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:17:29,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:17:29,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:17:29,483 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 111 [2022-10-17 10:17:29,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 397 transitions, 2770 flow. Second operand has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:17:29,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 10:17:29,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 111 [2022-10-17 10:17:29,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 10:17:35,239 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([496] L719-->L719-3: Formula: (= v_~s~0_22 (+ v_~s~0_23 1)) InVars {~s~0=v_~s~0_23} OutVars{thr1Thread3of3ForFork0_#t~post5#1=|v_thr1Thread3of3ForFork0_#t~post5#1_1|, ~s~0=v_~s~0_22} AuxVars[] AssignedVars[thr1Thread3of3ForFork0_#t~post5#1, ~s~0][282], [Black: 124#(and (= ~t~0 0) (= ~s~0 0)), Black: 126#(and (not (<= (+ (div ~s~0 4294967296) 1) (div (select (select |#memory_int| |thr1Thread1of3ForFork0_~#l~0#1.base|) |thr1Thread1of3ForFork0_~#l~0#1.offset|) 4294967296))) (= ~s~0 0) (<= 1 (select (select |#memory_int| |thr1Thread1of3ForFork0_~#l~0#1.base|) |thr1Thread1of3ForFork0_~#l~0#1.offset|))), Black: 125#(and (<= ~t~0 1) (<= 1 ~t~0) (= ~s~0 0)), 32#L719true, Black: 452#(and (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (= (mod ~c~0 4294967296) 1)), Black: 436#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (= ~s~0 0) (= (mod ~c~0 4294967296) 1)), Black: 418#(and (<= ~t~0 1) (<= 1 ~t~0) (not (= (mod ~c~0 4294967296) 1)) (= ~s~0 0)), 46#L717-8true, Black: 456#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~s~0 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (not (= (mod ~c~0 4294967296) 1)) (= ~s~0 0)), 45#L719-3true, Black: 470#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~s~0 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (= (mod ~c~0 4294967296) 1)), Black: 426#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~c~0 4294967296) 1)) (= ~s~0 0)), Black: 290#(not (= (mod ~c~0 4294967296) 1)), 121#true, Black: 450#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (= (mod ~c~0 4294967296) 1)), Black: 420#(and (<= ~t~0 1) (<= 1 ~t~0) (not (= (mod ~s~0 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (not (= (mod ~c~0 4294967296) 1)) (= ~s~0 0)), Black: 444#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~c~0 4294967296) 1))), 424#(and (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~c~0 4294967296) 1))), Black: 448#(and (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~s~0 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (not (= (mod ~c~0 4294967296) 1))), Black: 430#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~s~0 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (not (= (mod ~c~0 4294967296) 1)) (= ~s~0 0)), Black: 468#(and (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~s~0 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (= (mod ~c~0 4294967296) 1)), Black: 280#(= (mod ~c~0 4294967296) 1), Black: 446#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~s~0 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (not (= (mod ~c~0 4294967296) 1))), Black: 442#(and (<= 1 (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|)) (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (<= (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 1) (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (= ~s~0 0) (= |ULTIMATE.start_thr1_~#l~0#1.offset| 0) (= (mod ~c~0 4294967296) 1)), Black: 462#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~s~0 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (= ~s~0 0) (= (mod ~c~0 4294967296) 1)), Black: 434#(and (<= 1 (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|)) (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (<= (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 1) (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~c~0 4294967296) 1)) (= ~s~0 0) (= |ULTIMATE.start_thr1_~#l~0#1.offset| 0)), thr1Thread1of3ForFork0InUse, Black: 454#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~c~0 4294967296) 1)) (= ~s~0 0)), thr1Thread2of3ForFork0InUse, Black: 422#(and (<= ~t~0 1) (<= 1 ~t~0) (= ~s~0 0) (= (mod ~c~0 4294967296) 1)), 499#true, Black: 440#(and (not (<= (+ (div ~s~0 4294967296) 1) (div (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (<= 1 (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|)) (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (= ~s~0 0) (= (mod ~c~0 4294967296) 1)), Black: 460#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~s~0 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (= ~s~0 0) (= (mod ~c~0 4294967296) 1)), thr1Thread3of3ForFork0InUse, Black: 466#(and (not (= (mod ~s~0 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (= (mod ~c~0 4294967296) 1)), Black: 458#(and (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (= ~s~0 0) (= (mod ~c~0 4294967296) 1)), Black: 432#(and (not (<= (+ (div ~s~0 4294967296) 1) (div (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (<= 1 (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|)) (not (= (mod ~t~0 4294967296) (mod ~s~0 4294967296))) (not (= (mod (+ ~t~0 1) 4294967296) (mod ~s~0 4294967296))) (not (= (mod ~c~0 4294967296) 1)) (= ~s~0 0)), Black: 464#(and (not (= (mod ~s~0 4294967296) (mod (select (select |#memory_int| |ULTIMATE.start_thr1_~#l~0#1.base|) |ULTIMATE.start_thr1_~#l~0#1.offset|) 4294967296))) (not (= (mod ~c~0 4294967296) 1))), 112#true, 4#L717-8true, Black: 117#(= ~c~0 1)]) [2022-10-17 10:17:35,239 INFO L383 tUnfolder$Statistics]: this new event has 73 ancestors and is cut-off event [2022-10-17 10:17:35,239 INFO L386 tUnfolder$Statistics]: existing Event has 73 ancestors and is cut-off event [2022-10-17 10:17:35,239 INFO L386 tUnfolder$Statistics]: existing Event has 73 ancestors and is cut-off event [2022-10-17 10:17:35,240 INFO L386 tUnfolder$Statistics]: existing Event has 73 ancestors and is cut-off event