./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-data-race.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DataRace-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! data-race) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:54:36,502 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:54:36,639 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DataRace-32bit-Automizer_Default.epf [2023-11-19 07:54:36,648 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:54:36,649 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:54:36,692 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:54:36,693 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:54:36,694 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:54:36,695 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:54:36,701 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:54:36,702 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:54:36,703 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:54:36,704 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:54:36,706 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:54:36,706 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:54:36,707 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:54:36,708 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:54:36,708 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:54:36,709 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:54:36,709 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:54:36,710 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:54:36,710 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:54:36,711 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2023-11-19 07:54:36,711 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:54:36,712 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:54:36,712 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:54:36,713 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:54:36,714 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:54:36,715 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:54:36,715 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:54:36,717 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:54:36,717 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:54:36,718 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:54:36,718 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:54:36,718 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:54:36,719 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:54:36,719 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:54:36,719 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:54:36,720 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:54:36,720 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:54:36,720 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:54:36,721 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a10f98c1a89e2ac521234c9e4f0eca565cc5bc1484e9c7d67d861e216c6f9ba [2023-11-19 07:54:37,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:54:37,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:54:37,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:54:37,139 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:54:37,139 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:54:37,141 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-11-19 07:54:40,586 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:54:41,078 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:54:41,079 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/sv-benchmarks/c/goblint-regression/28-race_reach_70-funloop_racefree.i [2023-11-19 07:54:41,112 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/data/33d63fcad/c209048b2c1d4db9904c50c1a9c20524/FLAG67e64aa89 [2023-11-19 07:54:41,132 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/data/33d63fcad/c209048b2c1d4db9904c50c1a9c20524 [2023-11-19 07:54:41,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:54:41,137 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:54:41,139 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:54:41,139 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:54:41,149 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:54:41,151 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:41" (1/1) ... [2023-11-19 07:54:41,153 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@758579a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:41, skipping insertion in model container [2023-11-19 07:54:41,153 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:41" (1/1) ... [2023-11-19 07:54:41,217 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:54:41,890 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:54:41,918 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:54:42,001 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:54:42,130 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:54:42,131 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:42 WrapperNode [2023-11-19 07:54:42,132 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:54:42,134 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:54:42,134 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:54:42,134 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:54:42,144 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:42" (1/1) ... [2023-11-19 07:54:42,205 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:42" (1/1) ... [2023-11-19 07:54:42,292 INFO L138 Inliner]: procedures = 271, calls = 32, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 266 [2023-11-19 07:54:42,293 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:54:42,294 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:54:42,294 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:54:42,295 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:54:42,307 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:42" (1/1) ... [2023-11-19 07:54:42,308 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:42" (1/1) ... [2023-11-19 07:54:42,316 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:42" (1/1) ... [2023-11-19 07:54:42,316 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:42" (1/1) ... [2023-11-19 07:54:42,338 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:42" (1/1) ... [2023-11-19 07:54:42,346 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:42" (1/1) ... [2023-11-19 07:54:42,350 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:42" (1/1) ... [2023-11-19 07:54:42,353 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:42" (1/1) ... [2023-11-19 07:54:42,359 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:54:42,361 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:54:42,361 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:54:42,361 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:54:42,363 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:42" (1/1) ... [2023-11-19 07:54:42,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:54:42,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:42,444 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:54:42,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:54:42,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:54:42,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:54:42,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:54:42,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:54:42,503 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:54:42,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:54:42,504 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-19 07:54:42,504 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-19 07:54:42,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:54:42,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:54:42,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:54:42,507 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:54:42,763 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:54:42,766 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:54:43,386 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:54:43,402 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:54:43,403 INFO L302 CfgBuilder]: Removed 25 assume(true) statements. [2023-11-19 07:54:43,409 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:43 BoogieIcfgContainer [2023-11-19 07:54:43,409 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:54:43,413 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:54:43,413 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:54:43,417 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:54:43,417 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:54:41" (1/3) ... [2023-11-19 07:54:43,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f4ca8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:43, skipping insertion in model container [2023-11-19 07:54:43,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:42" (2/3) ... [2023-11-19 07:54:43,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78f4ca8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:43, skipping insertion in model container [2023-11-19 07:54:43,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:43" (3/3) ... [2023-11-19 07:54:43,421 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_70-funloop_racefree.i [2023-11-19 07:54:43,431 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:54:43,444 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:54:43,444 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-11-19 07:54:43,445 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:54:43,565 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-19 07:54:43,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 283 transitions, 573 flow [2023-11-19 07:54:43,790 INFO L124 PetriNetUnfolderBase]: 52/414 cut-off events. [2023-11-19 07:54:43,791 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:54:43,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 414 events. 52/414 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1821 event pairs, 0 based on Foata normal form. 0/342 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-11-19 07:54:43,803 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 283 transitions, 573 flow [2023-11-19 07:54:43,815 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 251 places, 283 transitions, 573 flow [2023-11-19 07:54:43,819 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:54:43,836 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 251 places, 283 transitions, 573 flow [2023-11-19 07:54:43,842 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 251 places, 283 transitions, 573 flow [2023-11-19 07:54:43,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 283 transitions, 573 flow [2023-11-19 07:54:43,968 INFO L124 PetriNetUnfolderBase]: 52/414 cut-off events. [2023-11-19 07:54:43,968 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:54:43,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 414 events. 52/414 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1821 event pairs, 0 based on Foata normal form. 0/342 useless extension candidates. Maximal degree in co-relation 246. Up to 8 conditions per place. [2023-11-19 07:54:44,001 INFO L119 LiptonReduction]: Number of co-enabled transitions 30140 [2023-11-19 07:54:48,112 INFO L134 LiptonReduction]: Checked pairs total: 108424 [2023-11-19 07:54:48,112 INFO L136 LiptonReduction]: Total number of compositions: 189 [2023-11-19 07:54:48,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:54:48,154 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=LoopHeads, 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;@7477231, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:54:48,154 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-11-19 07:54:48,163 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:54:48,163 INFO L124 PetriNetUnfolderBase]: 7/30 cut-off events. [2023-11-19 07:54:48,163 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:54:48,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:48,164 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-19 07:54:48,165 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr5ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (and 14 more)] === [2023-11-19 07:54:48,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:48,174 INFO L85 PathProgramCache]: Analyzing trace with hash 95307048, now seen corresponding path program 1 times [2023-11-19 07:54:48,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:48,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295243744] [2023-11-19 07:54:48,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:48,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:54:48,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:48,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295243744] [2023-11-19 07:54:48,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295243744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:48,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:48,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:54:48,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051237658] [2023-11-19 07:54:48,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:48,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:54:48,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:48,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:54:48,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:54:48,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 472 [2023-11-19 07:54:48,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 137 transitions, 281 flow. Second operand has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:48,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:48,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 472 [2023-11-19 07:54:48,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:49,233 INFO L124 PetriNetUnfolderBase]: 483/1714 cut-off events. [2023-11-19 07:54:49,233 INFO L125 PetriNetUnfolderBase]: For 3/8 co-relation queries the response was YES. [2023-11-19 07:54:49,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2623 conditions, 1714 events. 483/1714 cut-off events. For 3/8 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 11745 event pairs, 396 based on Foata normal form. 188/1726 useless extension candidates. Maximal degree in co-relation 2521. Up to 903 conditions per place. [2023-11-19 07:54:49,251 INFO L140 encePairwiseOnDemand]: 447/472 looper letters, 47 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2023-11-19 07:54:49,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 116 transitions, 337 flow [2023-11-19 07:54:49,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:54:49,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:54:49,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 804 transitions. [2023-11-19 07:54:49,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5677966101694916 [2023-11-19 07:54:49,283 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 804 transitions. [2023-11-19 07:54:49,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 804 transitions. [2023-11-19 07:54:49,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:49,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 804 transitions. [2023-11-19 07:54:49,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 268.0) internal successors, (804), 3 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:49,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 472.0) internal successors, (1888), 4 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:49,352 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 472.0) internal successors, (1888), 4 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:49,355 INFO L175 Difference]: Start difference. First operand has 112 places, 137 transitions, 281 flow. Second operand 3 states and 804 transitions. [2023-11-19 07:54:49,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 116 transitions, 337 flow [2023-11-19 07:54:49,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 116 transitions, 337 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:54:49,368 INFO L231 Difference]: Finished difference. Result has 115 places, 116 transitions, 249 flow [2023-11-19 07:54:49,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=115, PETRI_TRANSITIONS=116} [2023-11-19 07:54:49,376 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, 3 predicate places. [2023-11-19 07:54:49,377 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 116 transitions, 249 flow [2023-11-19 07:54:49,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:49,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:49,379 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:49,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:54:49,380 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr5ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (and 14 more)] === [2023-11-19 07:54:49,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:49,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1899819018, now seen corresponding path program 1 times [2023-11-19 07:54:49,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:49,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898438317] [2023-11-19 07:54:49,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:49,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:54:49,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:49,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898438317] [2023-11-19 07:54:49,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898438317] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:49,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554293704] [2023-11-19 07:54:49,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:49,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:49,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:49,543 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:49,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:54:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:49,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:54:49,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:54:49,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:54:49,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554293704] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:49,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:49,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 07:54:49,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320585161] [2023-11-19 07:54:49,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:49,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:54:49,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:49,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:54:49,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:54:49,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 472 [2023-11-19 07:54:49,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 116 transitions, 249 flow. Second operand has 7 states, 7 states have (on average 244.57142857142858) internal successors, (1712), 7 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:49,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:49,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 472 [2023-11-19 07:54:49,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:50,198 INFO L124 PetriNetUnfolderBase]: 483/1717 cut-off events. [2023-11-19 07:54:50,199 INFO L125 PetriNetUnfolderBase]: For 8/13 co-relation queries the response was YES. [2023-11-19 07:54:50,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2639 conditions, 1717 events. 483/1717 cut-off events. For 8/13 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 11765 event pairs, 396 based on Foata normal form. 0/1541 useless extension candidates. Maximal degree in co-relation 2627. Up to 903 conditions per place. [2023-11-19 07:54:50,213 INFO L140 encePairwiseOnDemand]: 469/472 looper letters, 47 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2023-11-19 07:54:50,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 119 transitions, 365 flow [2023-11-19 07:54:50,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:54:50,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:54:50,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1513 transitions. [2023-11-19 07:54:50,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5342514124293786 [2023-11-19 07:54:50,220 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1513 transitions. [2023-11-19 07:54:50,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1513 transitions. [2023-11-19 07:54:50,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:50,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1513 transitions. [2023-11-19 07:54:50,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 252.16666666666666) internal successors, (1513), 6 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:50,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 472.0) internal successors, (3304), 7 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:50,276 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 472.0) internal successors, (3304), 7 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:50,276 INFO L175 Difference]: Start difference. First operand has 115 places, 116 transitions, 249 flow. Second operand 6 states and 1513 transitions. [2023-11-19 07:54:50,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 119 transitions, 365 flow [2023-11-19 07:54:50,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 119 transitions, 361 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:54:50,282 INFO L231 Difference]: Finished difference. Result has 122 places, 119 transitions, 281 flow [2023-11-19 07:54:50,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=281, PETRI_PLACES=122, PETRI_TRANSITIONS=119} [2023-11-19 07:54:50,283 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, 10 predicate places. [2023-11-19 07:54:50,283 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 119 transitions, 281 flow [2023-11-19 07:54:50,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 244.57142857142858) internal successors, (1712), 7 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:50,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:50,286 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-11-19 07:54:50,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:50,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:50,516 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr5ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (and 14 more)] === [2023-11-19 07:54:50,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:50,517 INFO L85 PathProgramCache]: Analyzing trace with hash 166824104, now seen corresponding path program 2 times [2023-11-19 07:54:50,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:50,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889618203] [2023-11-19 07:54:50,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:50,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:50,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:54:50,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:50,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889618203] [2023-11-19 07:54:50,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889618203] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:50,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654170025] [2023-11-19 07:54:50,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:54:50,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:50,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:50,656 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:50,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:54:50,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:54:50,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:50,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:54:50,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:54:50,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:50,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 07:54:50,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654170025] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:50,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:50,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-19 07:54:50,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955994889] [2023-11-19 07:54:50,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:50,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:54:50,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:50,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:54:50,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:54:50,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 472 [2023-11-19 07:54:50,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 119 transitions, 281 flow. Second operand has 13 states, 13 states have (on average 244.30769230769232) internal successors, (3176), 13 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:50,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:50,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 472 [2023-11-19 07:54:50,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:51,274 INFO L124 PetriNetUnfolderBase]: 483/1723 cut-off events. [2023-11-19 07:54:51,275 INFO L125 PetriNetUnfolderBase]: For 28/33 co-relation queries the response was YES. [2023-11-19 07:54:51,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2676 conditions, 1723 events. 483/1723 cut-off events. For 28/33 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 11757 event pairs, 396 based on Foata normal form. 6/1554 useless extension candidates. Maximal degree in co-relation 2618. Up to 903 conditions per place. [2023-11-19 07:54:51,287 INFO L140 encePairwiseOnDemand]: 469/472 looper letters, 47 selfloop transitions, 11 changer transitions 0/125 dead transitions. [2023-11-19 07:54:51,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 125 transitions, 433 flow [2023-11-19 07:54:51,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:54:51,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:54:51,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2980 transitions. [2023-11-19 07:54:51,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261299435028248 [2023-11-19 07:54:51,299 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2980 transitions. [2023-11-19 07:54:51,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2980 transitions. [2023-11-19 07:54:51,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:51,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2980 transitions. [2023-11-19 07:54:51,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 248.33333333333334) internal successors, (2980), 12 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:51,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 472.0) internal successors, (6136), 13 states have internal predecessors, (6136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:51,332 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 472.0) internal successors, (6136), 13 states have internal predecessors, (6136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:51,333 INFO L175 Difference]: Start difference. First operand has 122 places, 119 transitions, 281 flow. Second operand 12 states and 2980 transitions. [2023-11-19 07:54:51,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 125 transitions, 433 flow [2023-11-19 07:54:51,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 125 transitions, 419 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-19 07:54:51,339 INFO L231 Difference]: Finished difference. Result has 138 places, 125 transitions, 351 flow [2023-11-19 07:54:51,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=472, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=351, PETRI_PLACES=138, PETRI_TRANSITIONS=125} [2023-11-19 07:54:51,341 INFO L281 CegarLoopForPetriNet]: 112 programPoint places, 26 predicate places. [2023-11-19 07:54:51,341 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 125 transitions, 351 flow [2023-11-19 07:54:51,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 244.30769230769232) internal successors, (3176), 13 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:51,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:51,344 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-11-19 07:54:51,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-19 07:54:51,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:51,558 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr5ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (and 14 more)] === [2023-11-19 07:54:51,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:51,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1667933672, now seen corresponding path program 3 times [2023-11-19 07:54:51,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:51,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564340863] [2023-11-19 07:54:51,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:51,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:54:51,598 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:54:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:54:51,655 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:54:51,661 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:54:51,662 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (16 of 17 remaining) [2023-11-19 07:54:51,664 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONDATA_RACE (15 of 17 remaining) [2023-11-19 07:54:51,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE (14 of 17 remaining) [2023-11-19 07:54:51,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (13 of 17 remaining) [2023-11-19 07:54:51,665 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE (12 of 17 remaining) [2023-11-19 07:54:51,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE (11 of 17 remaining) [2023-11-19 07:54:51,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONDATA_RACE (10 of 17 remaining) [2023-11-19 07:54:51,666 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONDATA_RACE (9 of 17 remaining) [2023-11-19 07:54:51,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONDATA_RACE (8 of 17 remaining) [2023-11-19 07:54:51,667 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONDATA_RACE (7 of 17 remaining) [2023-11-19 07:54:51,669 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONDATA_RACE (6 of 17 remaining) [2023-11-19 07:54:51,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONDATA_RACE (5 of 17 remaining) [2023-11-19 07:54:51,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONDATA_RACE (4 of 17 remaining) [2023-11-19 07:54:51,673 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONDATA_RACE (3 of 17 remaining) [2023-11-19 07:54:51,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONDATA_RACE (2 of 17 remaining) [2023-11-19 07:54:51,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONDATA_RACE (1 of 17 remaining) [2023-11-19 07:54:51,674 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONDATA_RACE (0 of 17 remaining) [2023-11-19 07:54:51,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:54:51,675 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-11-19 07:54:51,679 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:54:51,679 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:54:51,765 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:54:51,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 349 places, 395 transitions, 806 flow [2023-11-19 07:54:51,916 INFO L124 PetriNetUnfolderBase]: 87/689 cut-off events. [2023-11-19 07:54:51,916 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:54:51,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 701 conditions, 689 events. 87/689 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3775 event pairs, 0 based on Foata normal form. 0/569 useless extension candidates. Maximal degree in co-relation 416. Up to 12 conditions per place. [2023-11-19 07:54:51,930 INFO L82 GeneralOperation]: Start removeDead. Operand has 349 places, 395 transitions, 806 flow [2023-11-19 07:54:51,941 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 349 places, 395 transitions, 806 flow [2023-11-19 07:54:51,942 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:54:51,942 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 349 places, 395 transitions, 806 flow [2023-11-19 07:54:51,942 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 349 places, 395 transitions, 806 flow [2023-11-19 07:54:51,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 349 places, 395 transitions, 806 flow [2023-11-19 07:54:52,088 INFO L124 PetriNetUnfolderBase]: 87/689 cut-off events. [2023-11-19 07:54:52,088 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:54:52,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 701 conditions, 689 events. 87/689 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3775 event pairs, 0 based on Foata normal form. 0/569 useless extension candidates. Maximal degree in co-relation 416. Up to 12 conditions per place. [2023-11-19 07:54:52,147 INFO L119 LiptonReduction]: Number of co-enabled transitions 86900 [2023-11-19 07:54:56,659 INFO L134 LiptonReduction]: Checked pairs total: 315053 [2023-11-19 07:54:56,662 INFO L136 LiptonReduction]: Total number of compositions: 253 [2023-11-19 07:54:56,666 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:54:56,668 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=LoopHeads, 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;@7477231, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:54:56,669 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-19 07:54:56,675 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:54:56,676 INFO L124 PetriNetUnfolderBase]: 13/65 cut-off events. [2023-11-19 07:54:56,676 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:54:56,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:56,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:56,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONDATA_RACE === [ULTIMATE.startErr5ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (and 19 more)] === [2023-11-19 07:54:56,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:56,677 INFO L85 PathProgramCache]: Analyzing trace with hash -363413164, now seen corresponding path program 1 times [2023-11-19 07:54:56,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:56,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199890170] [2023-11-19 07:54:56,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:56,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:56,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:56,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:56,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199890170] [2023-11-19 07:54:56,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199890170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:56,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:56,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:54:56,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339312570] [2023-11-19 07:54:56,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:56,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:54:56,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:56,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:54:56,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:54:56,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 648 [2023-11-19 07:54:56,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 201 transitions, 418 flow. Second operand has 3 states, 3 states have (on average 341.6666666666667) internal successors, (1025), 3 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:56,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:56,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 648 [2023-11-19 07:54:56,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:02,283 INFO L124 PetriNetUnfolderBase]: 18367/41842 cut-off events. [2023-11-19 07:55:02,283 INFO L125 PetriNetUnfolderBase]: For 185/257 co-relation queries the response was YES. [2023-11-19 07:55:02,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67986 conditions, 41842 events. 18367/41842 cut-off events. For 185/257 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 442190 event pairs, 15876 based on Foata normal form. 5449/42598 useless extension candidates. Maximal degree in co-relation 30382. Up to 26041 conditions per place. [2023-11-19 07:55:02,647 INFO L140 encePairwiseOnDemand]: 612/648 looper letters, 68 selfloop transitions, 2 changer transitions 0/169 dead transitions. [2023-11-19 07:55:02,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 169 transitions, 494 flow [2023-11-19 07:55:02,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:02,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:55:02,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1124 transitions. [2023-11-19 07:55:02,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5781893004115226 [2023-11-19 07:55:02,654 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1124 transitions. [2023-11-19 07:55:02,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1124 transitions. [2023-11-19 07:55:02,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:02,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1124 transitions. [2023-11-19 07:55:02,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:02,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 648.0) internal successors, (2592), 4 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:02,667 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 648.0) internal successors, (2592), 4 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:02,667 INFO L175 Difference]: Start difference. First operand has 164 places, 201 transitions, 418 flow. Second operand 3 states and 1124 transitions. [2023-11-19 07:55:02,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 169 transitions, 494 flow [2023-11-19 07:55:02,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 169 transitions, 494 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:55:02,676 INFO L231 Difference]: Finished difference. Result has 167 places, 169 transitions, 364 flow [2023-11-19 07:55:02,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=648, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=364, PETRI_PLACES=167, PETRI_TRANSITIONS=169} [2023-11-19 07:55:02,680 INFO L281 CegarLoopForPetriNet]: 164 programPoint places, 3 predicate places. [2023-11-19 07:55:02,680 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 169 transitions, 364 flow [2023-11-19 07:55:02,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 341.6666666666667) internal successors, (1025), 3 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:02,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:02,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:02,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:55:02,681 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONDATA_RACE === [ULTIMATE.startErr5ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (and 19 more)] === [2023-11-19 07:55:02,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:02,683 INFO L85 PathProgramCache]: Analyzing trace with hash -315798838, now seen corresponding path program 1 times [2023-11-19 07:55:02,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:02,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720845345] [2023-11-19 07:55:02,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:02,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:02,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:02,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:02,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720845345] [2023-11-19 07:55:02,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720845345] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:02,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8116435] [2023-11-19 07:55:02,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:02,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:02,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:02,782 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:02,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:55:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:02,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:55:02,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:55:02,904 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:55:02,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8116435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:02,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:55:02,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-19 07:55:02,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969417214] [2023-11-19 07:55:02,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:02,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:55:02,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:02,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:55:02,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:55:02,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 340 out of 648 [2023-11-19 07:55:02,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 169 transitions, 364 flow. Second operand has 3 states, 3 states have (on average 342.0) internal successors, (1026), 3 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:02,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:02,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 340 of 648 [2023-11-19 07:55:02,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:08,272 INFO L124 PetriNetUnfolderBase]: 17982/41292 cut-off events. [2023-11-19 07:55:08,272 INFO L125 PetriNetUnfolderBase]: For 298/438 co-relation queries the response was YES. [2023-11-19 07:55:08,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67424 conditions, 41292 events. 17982/41292 cut-off events. For 298/438 co-relation queries the response was YES. Maximal size of possible extension queue 960. Compared 441147 event pairs, 7596 based on Foata normal form. 0/36718 useless extension candidates. Maximal degree in co-relation 67411. Up to 26001 conditions per place. [2023-11-19 07:55:08,837 INFO L140 encePairwiseOnDemand]: 645/648 looper letters, 89 selfloop transitions, 2 changer transitions 0/190 dead transitions. [2023-11-19 07:55:08,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 190 transitions, 588 flow [2023-11-19 07:55:08,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:55:08,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:55:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1111 transitions. [2023-11-19 07:55:08,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5715020576131687 [2023-11-19 07:55:08,849 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1111 transitions. [2023-11-19 07:55:08,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1111 transitions. [2023-11-19 07:55:08,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:08,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1111 transitions. [2023-11-19 07:55:08,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 370.3333333333333) internal successors, (1111), 3 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:08,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 648.0) internal successors, (2592), 4 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:08,873 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 648.0) internal successors, (2592), 4 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:08,873 INFO L175 Difference]: Start difference. First operand has 167 places, 169 transitions, 364 flow. Second operand 3 states and 1111 transitions. [2023-11-19 07:55:08,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 190 transitions, 588 flow [2023-11-19 07:55:08,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 190 transitions, 584 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-19 07:55:08,886 INFO L231 Difference]: Finished difference. Result has 169 places, 170 transitions, 372 flow [2023-11-19 07:55:08,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=648, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=372, PETRI_PLACES=169, PETRI_TRANSITIONS=170} [2023-11-19 07:55:08,892 INFO L281 CegarLoopForPetriNet]: 164 programPoint places, 5 predicate places. [2023-11-19 07:55:08,893 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 170 transitions, 372 flow [2023-11-19 07:55:08,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 342.0) internal successors, (1026), 3 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:08,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:08,894 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:08,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:09,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:09,122 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr5ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (and 19 more)] === [2023-11-19 07:55:09,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:09,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1339499845, now seen corresponding path program 1 times [2023-11-19 07:55:09,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:09,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849311646] [2023-11-19 07:55:09,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:09,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:55:09,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:09,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849311646] [2023-11-19 07:55:09,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849311646] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:09,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575637119] [2023-11-19 07:55:09,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:09,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:09,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:09,230 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:09,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:55:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:09,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:55:09,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:55:09,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:55:09,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575637119] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:09,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:09,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 07:55:09,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498727450] [2023-11-19 07:55:09,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:09,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:55:09,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:09,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:55:09,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:55:09,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 648 [2023-11-19 07:55:09,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 170 transitions, 372 flow. Second operand has 7 states, 7 states have (on average 340.7142857142857) internal successors, (2385), 7 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:09,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:09,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 648 [2023-11-19 07:55:09,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:15,032 INFO L124 PetriNetUnfolderBase]: 18400/42158 cut-off events. [2023-11-19 07:55:15,033 INFO L125 PetriNetUnfolderBase]: For 1018/1096 co-relation queries the response was YES. [2023-11-19 07:55:15,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69075 conditions, 42158 events. 18400/42158 cut-off events. For 1018/1096 co-relation queries the response was YES. Maximal size of possible extension queue 983. Compared 447771 event pairs, 15876 based on Foata normal form. 3/37734 useless extension candidates. Maximal degree in co-relation 69047. Up to 26022 conditions per place. [2023-11-19 07:55:15,307 INFO L140 encePairwiseOnDemand]: 645/648 looper letters, 69 selfloop transitions, 5 changer transitions 0/173 dead transitions. [2023-11-19 07:55:15,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 173 transitions, 532 flow [2023-11-19 07:55:15,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:55:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:55:15,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2110 transitions. [2023-11-19 07:55:15,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426954732510288 [2023-11-19 07:55:15,317 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2110 transitions. [2023-11-19 07:55:15,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2110 transitions. [2023-11-19 07:55:15,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:15,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2110 transitions. [2023-11-19 07:55:15,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 351.6666666666667) internal successors, (2110), 6 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:15,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 648.0) internal successors, (4536), 7 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:15,336 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 648.0) internal successors, (4536), 7 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:15,337 INFO L175 Difference]: Start difference. First operand has 169 places, 170 transitions, 372 flow. Second operand 6 states and 2110 transitions. [2023-11-19 07:55:15,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 173 transitions, 532 flow [2023-11-19 07:55:15,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 173 transitions, 530 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:55:15,342 INFO L231 Difference]: Finished difference. Result has 176 places, 173 transitions, 406 flow [2023-11-19 07:55:15,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=648, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=406, PETRI_PLACES=176, PETRI_TRANSITIONS=173} [2023-11-19 07:55:15,343 INFO L281 CegarLoopForPetriNet]: 164 programPoint places, 12 predicate places. [2023-11-19 07:55:15,344 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 173 transitions, 406 flow [2023-11-19 07:55:15,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 340.7142857142857) internal successors, (2385), 7 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:15,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:15,345 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-19 07:55:15,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-19 07:55:15,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:55:15,565 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr5ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (and 19 more)] === [2023-11-19 07:55:15,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:15,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1327927601, now seen corresponding path program 2 times [2023-11-19 07:55:15,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:15,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244751293] [2023-11-19 07:55:15,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:15,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:55:15,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:15,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244751293] [2023-11-19 07:55:15,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244751293] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:15,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848342241] [2023-11-19 07:55:15,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:55:15,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:15,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:15,693 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:15,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:55:15,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:55:15,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:15,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:55:15,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:15,827 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:55:15,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:15,892 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:55:15,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848342241] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:15,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:15,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-19 07:55:15,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432361114] [2023-11-19 07:55:15,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:15,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:55:15,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:15,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:55:15,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:55:15,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 648 [2023-11-19 07:55:15,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 173 transitions, 406 flow. Second operand has 13 states, 13 states have (on average 340.38461538461536) internal successors, (4425), 13 states have internal predecessors, (4425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:15,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:55:15,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 648 [2023-11-19 07:55:15,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:55:21,215 INFO L124 PetriNetUnfolderBase]: 18400/42164 cut-off events. [2023-11-19 07:55:21,216 INFO L125 PetriNetUnfolderBase]: For 1052/1130 co-relation queries the response was YES. [2023-11-19 07:55:21,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69095 conditions, 42164 events. 18400/42164 cut-off events. For 1052/1130 co-relation queries the response was YES. Maximal size of possible extension queue 983. Compared 447372 event pairs, 15876 based on Foata normal form. 6/37743 useless extension candidates. Maximal degree in co-relation 69035. Up to 26022 conditions per place. [2023-11-19 07:55:21,554 INFO L140 encePairwiseOnDemand]: 645/648 looper letters, 69 selfloop transitions, 11 changer transitions 0/179 dead transitions. [2023-11-19 07:55:21,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 179 transitions, 602 flow [2023-11-19 07:55:21,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:55:21,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:55:21,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 4153 transitions. [2023-11-19 07:55:21,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340792181069959 [2023-11-19 07:55:21,576 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 4153 transitions. [2023-11-19 07:55:21,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 4153 transitions. [2023-11-19 07:55:21,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:55:21,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 4153 transitions. [2023-11-19 07:55:21,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 346.0833333333333) internal successors, (4153), 12 states have internal predecessors, (4153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:21,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 648.0) internal successors, (8424), 13 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:21,636 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 648.0) internal successors, (8424), 13 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:21,636 INFO L175 Difference]: Start difference. First operand has 176 places, 173 transitions, 406 flow. Second operand 12 states and 4153 transitions. [2023-11-19 07:55:21,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 179 transitions, 602 flow [2023-11-19 07:55:21,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 179 transitions, 588 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-19 07:55:21,648 INFO L231 Difference]: Finished difference. Result has 192 places, 179 transitions, 476 flow [2023-11-19 07:55:21,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=648, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=476, PETRI_PLACES=192, PETRI_TRANSITIONS=179} [2023-11-19 07:55:21,652 INFO L281 CegarLoopForPetriNet]: 164 programPoint places, 28 predicate places. [2023-11-19 07:55:21,652 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 179 transitions, 476 flow [2023-11-19 07:55:21,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 340.38461538461536) internal successors, (4425), 13 states have internal predecessors, (4425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:21,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:55:21,654 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-11-19 07:55:21,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:21,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25bec228-29dc-4a66-a598-12af24c289ce/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:55:21,868 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr5ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE, ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (and 19 more)] === [2023-11-19 07:55:21,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:21,868 INFO L85 PathProgramCache]: Analyzing trace with hash -58148081, now seen corresponding path program 3 times [2023-11-19 07:55:21,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:21,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344194353] [2023-11-19 07:55:21,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:21,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:21,929 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:55:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:55:21,975 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:55:21,976 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:55:21,976 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (21 of 22 remaining) [2023-11-19 07:55:21,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONDATA_RACE (20 of 22 remaining) [2023-11-19 07:55:21,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE (19 of 22 remaining) [2023-11-19 07:55:21,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (18 of 22 remaining) [2023-11-19 07:55:21,977 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE (17 of 22 remaining) [2023-11-19 07:55:21,978 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE (16 of 22 remaining) [2023-11-19 07:55:21,978 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONDATA_RACE (15 of 22 remaining) [2023-11-19 07:55:21,978 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONDATA_RACE (14 of 22 remaining) [2023-11-19 07:55:21,979 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONDATA_RACE (13 of 22 remaining) [2023-11-19 07:55:21,979 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONDATA_RACE (12 of 22 remaining) [2023-11-19 07:55:21,980 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONDATA_RACE (11 of 22 remaining) [2023-11-19 07:55:21,980 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONDATA_RACE (10 of 22 remaining) [2023-11-19 07:55:21,980 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONDATA_RACE (9 of 22 remaining) [2023-11-19 07:55:21,980 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONDATA_RACE (8 of 22 remaining) [2023-11-19 07:55:21,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONDATA_RACE (7 of 22 remaining) [2023-11-19 07:55:21,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONDATA_RACE (6 of 22 remaining) [2023-11-19 07:55:21,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONDATA_RACE (5 of 22 remaining) [2023-11-19 07:55:21,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4ASSERT_VIOLATIONDATA_RACE (4 of 22 remaining) [2023-11-19 07:55:21,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONDATA_RACE (3 of 22 remaining) [2023-11-19 07:55:21,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2ASSERT_VIOLATIONDATA_RACE (2 of 22 remaining) [2023-11-19 07:55:21,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1ASSERT_VIOLATIONDATA_RACE (1 of 22 remaining) [2023-11-19 07:55:21,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3ASSERT_VIOLATIONDATA_RACE (0 of 22 remaining) [2023-11-19 07:55:21,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:55:21,983 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2023-11-19 07:55:21,984 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:55:21,984 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 07:55:22,081 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-19 07:55:22,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 447 places, 507 transitions, 1041 flow [2023-11-19 07:55:22,410 INFO L124 PetriNetUnfolderBase]: 127/1011 cut-off events. [2023-11-19 07:55:22,411 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 07:55:22,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 1011 events. 127/1011 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6097 event pairs, 1 based on Foata normal form. 0/837 useless extension candidates. Maximal degree in co-relation 697. Up to 16 conditions per place. [2023-11-19 07:55:22,439 INFO L82 GeneralOperation]: Start removeDead. Operand has 447 places, 507 transitions, 1041 flow [2023-11-19 07:55:22,459 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 447 places, 507 transitions, 1041 flow [2023-11-19 07:55:22,459 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:55:22,460 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 447 places, 507 transitions, 1041 flow [2023-11-19 07:55:22,460 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 447 places, 507 transitions, 1041 flow [2023-11-19 07:55:22,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 447 places, 507 transitions, 1041 flow [2023-11-19 07:55:22,727 INFO L124 PetriNetUnfolderBase]: 127/1011 cut-off events. [2023-11-19 07:55:22,727 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-19 07:55:22,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 1011 events. 127/1011 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6097 event pairs, 1 based on Foata normal form. 0/837 useless extension candidates. Maximal degree in co-relation 697. Up to 16 conditions per place. [2023-11-19 07:55:22,849 INFO L119 LiptonReduction]: Number of co-enabled transitions 167640