./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:57:40,650 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:57:40,725 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 21:57:40,730 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:57:40,731 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:57:40,767 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:57:40,771 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:57:40,772 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:57:40,773 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:57:40,778 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:57:40,779 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:57:40,779 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:57:40,779 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 21:57:40,781 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:57:40,782 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:57:40,782 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:57:40,783 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:57:40,783 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:57:40,783 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:57:40,784 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:57:40,784 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:57:40,785 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:57:40,785 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:57:40,786 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:57:40,786 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:57:40,786 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:57:40,787 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 21:57:40,787 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:57:40,787 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:57:40,788 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:57:40,788 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:57:40,789 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:57:40,789 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 21:57:40,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:57:40,789 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 21:57:40,789 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:57:40,790 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 21:57:40,790 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:57:40,790 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 21:57:40,790 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_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a [2023-11-06 21:57:41,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:57:41,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:57:41,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:57:41,097 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:57:41,097 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:57:41,099 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2023-11-06 21:57:44,257 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:57:44,623 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:57:44,623 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2023-11-06 21:57:44,644 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/data/6e351248e/2e6d0b212325471e8950efeb2cdecf85/FLAGc334fa13c [2023-11-06 21:57:44,660 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/data/6e351248e/2e6d0b212325471e8950efeb2cdecf85 [2023-11-06 21:57:44,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:57:44,664 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:57:44,666 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:57:44,666 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:57:44,684 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:57:44,685 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:57:44" (1/1) ... [2023-11-06 21:57:44,686 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22340167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:44, skipping insertion in model container [2023-11-06 21:57:44,686 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:57:44" (1/1) ... [2023-11-06 21:57:44,744 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:57:45,244 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i[47038,47051] [2023-11-06 21:57:45,304 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:57:45,393 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:57:45,432 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i[47038,47051] [2023-11-06 21:57:45,447 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:57:45,527 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:57:45,528 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:45 WrapperNode [2023-11-06 21:57:45,528 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:57:45,529 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:57:45,529 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:57:45,529 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:57:45,537 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:45" (1/1) ... [2023-11-06 21:57:45,579 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:45" (1/1) ... [2023-11-06 21:57:45,622 INFO L138 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 236 [2023-11-06 21:57:45,623 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:57:45,624 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:57:45,624 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:57:45,624 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:57:45,635 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:45" (1/1) ... [2023-11-06 21:57:45,635 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:45" (1/1) ... [2023-11-06 21:57:45,658 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:45" (1/1) ... [2023-11-06 21:57:45,658 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:45" (1/1) ... [2023-11-06 21:57:45,689 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:45" (1/1) ... [2023-11-06 21:57:45,712 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:45" (1/1) ... [2023-11-06 21:57:45,716 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:45" (1/1) ... [2023-11-06 21:57:45,718 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:45" (1/1) ... [2023-11-06 21:57:45,723 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:57:45,724 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:57:45,734 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:57:45,734 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:57:45,735 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:45" (1/1) ... [2023-11-06 21:57:45,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:57:45,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:45,777 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:57:45,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:57:45,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:57:45,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 21:57:45,827 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-11-06 21:57:45,828 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-11-06 21:57:45,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:57:45,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:57:45,828 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-11-06 21:57:45,828 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-11-06 21:57:45,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:57:45,829 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-06 21:57:45,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 21:57:45,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:57:45,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 21:57:45,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:57:45,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:57:45,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:57:45,835 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 21:57:46,062 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:57:46,064 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:57:46,540 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:57:46,555 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:57:46,555 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-06 21:57:46,557 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:57:46 BoogieIcfgContainer [2023-11-06 21:57:46,558 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:57:46,564 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:57:46,565 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:57:46,568 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:57:46,568 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:57:44" (1/3) ... [2023-11-06 21:57:46,569 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d387e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:57:46, skipping insertion in model container [2023-11-06 21:57:46,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:57:45" (2/3) ... [2023-11-06 21:57:46,570 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d387e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:57:46, skipping insertion in model container [2023-11-06 21:57:46,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:57:46" (3/3) ... [2023-11-06 21:57:46,571 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing.i [2023-11-06 21:57:46,591 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 21:57:46,602 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:57:46,603 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:57:46,603 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 21:57:46,730 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-06 21:57:46,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 247 transitions, 514 flow [2023-11-06 21:57:47,011 INFO L124 PetriNetUnfolderBase]: 54/466 cut-off events. [2023-11-06 21:57:47,011 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-06 21:57:47,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 466 events. 54/466 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1889 event pairs, 0 based on Foata normal form. 0/402 useless extension candidates. Maximal degree in co-relation 236. Up to 8 conditions per place. [2023-11-06 21:57:47,025 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 247 transitions, 514 flow [2023-11-06 21:57:47,034 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 227 places, 245 transitions, 504 flow [2023-11-06 21:57:47,038 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 21:57:47,048 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 227 places, 245 transitions, 504 flow [2023-11-06 21:57:47,051 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 227 places, 245 transitions, 504 flow [2023-11-06 21:57:47,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 245 transitions, 504 flow [2023-11-06 21:57:47,134 INFO L124 PetriNetUnfolderBase]: 50/454 cut-off events. [2023-11-06 21:57:47,134 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 21:57:47,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467 conditions, 454 events. 50/454 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1800 event pairs, 0 based on Foata normal form. 0/390 useless extension candidates. Maximal degree in co-relation 224. Up to 8 conditions per place. [2023-11-06 21:57:47,156 INFO L119 LiptonReduction]: Number of co-enabled transitions 18738 [2023-11-06 21:57:55,179 INFO L134 LiptonReduction]: Checked pairs total: 26059 [2023-11-06 21:57:55,179 INFO L136 LiptonReduction]: Total number of compositions: 198 [2023-11-06 21:57:55,213 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:57:55,221 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3a4dbd18, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 21:57:55,222 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 21:57:55,231 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 21:57:55,231 INFO L124 PetriNetUnfolderBase]: 1/27 cut-off events. [2023-11-06 21:57:55,231 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 21:57:55,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:55,232 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-06 21:57:55,233 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:57:55,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:55,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1894194674, now seen corresponding path program 1 times [2023-11-06 21:57:55,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:55,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976691571] [2023-11-06 21:57:55,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:55,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:55,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:57:55,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:55,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976691571] [2023-11-06 21:57:55,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976691571] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:57:55,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:57:55,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:57:55,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5820637] [2023-11-06 21:57:55,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:57:55,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:57:55,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:55,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:57:55,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:57:55,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 445 [2023-11-06 21:57:55,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 69 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 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) [2023-11-06 21:57:55,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:57:55,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 445 [2023-11-06 21:57:55,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:57:56,617 INFO L124 PetriNetUnfolderBase]: 3305/5694 cut-off events. [2023-11-06 21:57:56,617 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2023-11-06 21:57:56,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10930 conditions, 5694 events. 3305/5694 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 33706 event pairs, 3078 based on Foata normal form. 460/5124 useless extension candidates. Maximal degree in co-relation 9868. Up to 5168 conditions per place. [2023-11-06 21:57:56,648 INFO L140 encePairwiseOnDemand]: 430/445 looper letters, 47 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-11-06 21:57:56,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 226 flow [2023-11-06 21:57:56,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:57:56,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 21:57:56,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 713 transitions. [2023-11-06 21:57:56,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340823970037453 [2023-11-06 21:57:56,673 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 713 transitions. [2023-11-06 21:57:56,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 713 transitions. [2023-11-06 21:57:56,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:57:56,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 713 transitions. [2023-11-06 21:57:56,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.66666666666666) internal successors, (713), 3 states have internal predecessors, (713), 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) [2023-11-06 21:57:56,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 445.0) internal successors, (1780), 4 states have internal predecessors, (1780), 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) [2023-11-06 21:57:56,700 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 445.0) internal successors, (1780), 4 states have internal predecessors, (1780), 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) [2023-11-06 21:57:56,703 INFO L175 Difference]: Start difference. First operand has 57 places, 69 transitions, 152 flow. Second operand 3 states and 713 transitions. [2023-11-06 21:57:56,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 226 flow [2023-11-06 21:57:56,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 226 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 21:57:56,714 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 138 flow [2023-11-06 21:57:56,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2023-11-06 21:57:56,722 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2023-11-06 21:57:56,723 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 138 flow [2023-11-06 21:57:56,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 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) [2023-11-06 21:57:56,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:56,725 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-06 21:57:56,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:57:56,725 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:57:56,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:56,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1362715464, now seen corresponding path program 1 times [2023-11-06 21:57:56,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:56,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609671117] [2023-11-06 21:57:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:56,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:57:56,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:56,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609671117] [2023-11-06 21:57:56,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609671117] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:56,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100126709] [2023-11-06 21:57:56,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:56,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:56,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:56,920 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:56,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:57:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:57,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:57:57,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:57,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:57:57,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:57:57,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100126709] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:57,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:57,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 21:57:57,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808093734] [2023-11-06 21:57:57,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:57,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:57:57,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:57,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:57:57,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 21:57:57,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 445 [2023-11-06 21:57:57,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 138 flow. Second operand has 7 states, 7 states have (on average 217.57142857142858) internal successors, (1523), 7 states have internal predecessors, (1523), 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) [2023-11-06 21:57:57,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:57:57,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 445 [2023-11-06 21:57:57,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:57:58,180 INFO L124 PetriNetUnfolderBase]: 3305/5697 cut-off events. [2023-11-06 21:57:58,183 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2023-11-06 21:57:58,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10946 conditions, 5697 events. 3305/5697 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 33704 event pairs, 3078 based on Foata normal form. 0/4667 useless extension candidates. Maximal degree in co-relation 10933. Up to 5168 conditions per place. [2023-11-06 21:57:58,218 INFO L140 encePairwiseOnDemand]: 442/445 looper letters, 47 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-11-06 21:57:58,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 60 transitions, 254 flow [2023-11-06 21:57:58,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:57:58,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 21:57:58,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1351 transitions. [2023-11-06 21:57:58,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059925093632959 [2023-11-06 21:57:58,226 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1351 transitions. [2023-11-06 21:57:58,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1351 transitions. [2023-11-06 21:57:58,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:57:58,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1351 transitions. [2023-11-06 21:57:58,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 225.16666666666666) internal successors, (1351), 6 states have internal predecessors, (1351), 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) [2023-11-06 21:57:58,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 445.0) internal successors, (3115), 7 states have internal predecessors, (3115), 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) [2023-11-06 21:57:58,250 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 445.0) internal successors, (3115), 7 states have internal predecessors, (3115), 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) [2023-11-06 21:57:58,250 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 138 flow. Second operand 6 states and 1351 transitions. [2023-11-06 21:57:58,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 60 transitions, 254 flow [2023-11-06 21:57:58,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 60 transitions, 250 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 21:57:58,257 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 170 flow [2023-11-06 21:57:58,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2023-11-06 21:57:58,258 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 9 predicate places. [2023-11-06 21:57:58,258 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 170 flow [2023-11-06 21:57:58,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 217.57142857142858) internal successors, (1523), 7 states have internal predecessors, (1523), 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) [2023-11-06 21:57:58,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:57:58,260 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-11-06 21:57:58,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:57:58,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 21:57:58,468 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:57:58,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:57:58,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1405902990, now seen corresponding path program 2 times [2023-11-06 21:57:58,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:57:58,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145697216] [2023-11-06 21:57:58,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:57:58,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:57:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:57:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:57:58,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:57:58,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145697216] [2023-11-06 21:57:58,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145697216] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:57:58,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317364968] [2023-11-06 21:57:58,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 21:57:58,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:57:58,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:57:58,722 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:57:58,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:57:58,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 21:57:58,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:57:58,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:57:58,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:57:58,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:57:58,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:57:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:57:58,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317364968] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:57:58,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:57:58,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 21:57:58,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304670788] [2023-11-06 21:57:58,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:57:58,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:57:58,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 21:57:59,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:57:59,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:57:59,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 445 [2023-11-06 21:57:59,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 170 flow. Second operand has 13 states, 13 states have (on average 217.30769230769232) internal successors, (2825), 13 states have internal predecessors, (2825), 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) [2023-11-06 21:57:59,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 21:57:59,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 445 [2023-11-06 21:57:59,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 21:58:00,174 INFO L124 PetriNetUnfolderBase]: 3305/5703 cut-off events. [2023-11-06 21:58:00,175 INFO L125 PetriNetUnfolderBase]: For 126/126 co-relation queries the response was YES. [2023-11-06 21:58:00,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10983 conditions, 5703 events. 3305/5703 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 33699 event pairs, 3078 based on Foata normal form. 6/4680 useless extension candidates. Maximal degree in co-relation 10924. Up to 5168 conditions per place. [2023-11-06 21:58:00,206 INFO L140 encePairwiseOnDemand]: 442/445 looper letters, 47 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2023-11-06 21:58:00,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 66 transitions, 322 flow [2023-11-06 21:58:00,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:58:00,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-06 21:58:00,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2656 transitions. [2023-11-06 21:58:00,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49737827715355803 [2023-11-06 21:58:00,216 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2656 transitions. [2023-11-06 21:58:00,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2656 transitions. [2023-11-06 21:58:00,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 21:58:00,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2656 transitions. [2023-11-06 21:58:00,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 221.33333333333334) internal successors, (2656), 12 states have internal predecessors, (2656), 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) [2023-11-06 21:58:00,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 445.0) internal successors, (5785), 13 states have internal predecessors, (5785), 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) [2023-11-06 21:58:00,245 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 445.0) internal successors, (5785), 13 states have internal predecessors, (5785), 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) [2023-11-06 21:58:00,245 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 170 flow. Second operand 12 states and 2656 transitions. [2023-11-06 21:58:00,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 66 transitions, 322 flow [2023-11-06 21:58:00,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 66 transitions, 308 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-06 21:58:00,250 INFO L231 Difference]: Finished difference. Result has 82 places, 66 transitions, 240 flow [2023-11-06 21:58:00,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=240, PETRI_PLACES=82, PETRI_TRANSITIONS=66} [2023-11-06 21:58:00,252 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2023-11-06 21:58:00,252 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 66 transitions, 240 flow [2023-11-06 21:58:00,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 217.30769230769232) internal successors, (2825), 13 states have internal predecessors, (2825), 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) [2023-11-06 21:58:00,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 21:58:00,254 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-11-06 21:58:00,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:58:00,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:00,460 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 21:58:00,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:58:00,461 INFO L85 PathProgramCache]: Analyzing trace with hash 800163406, now seen corresponding path program 3 times [2023-11-06 21:58:00,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 21:58:00,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144289616] [2023-11-06 21:58:00,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:58:00,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:58:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:58:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 21:58:01,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 21:58:01,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144289616] [2023-11-06 21:58:01,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144289616] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:58:01,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217371218] [2023-11-06 21:58:01,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:58:01,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:58:01,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 21:58:01,042 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:58:01,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:02:10,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-06 22:02:10,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:02:10,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:02:10,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:02:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:02:10,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:02:11,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217371218] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:11,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:02:11,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-06 22:02:11,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375387875] [2023-11-06 22:02:11,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:11,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:02:11,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:11,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:02:11,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:02:11,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 445 [2023-11-06 22:02:11,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 66 transitions, 240 flow. Second operand has 25 states, 25 states have (on average 217.16) internal successors, (5429), 25 states have internal predecessors, (5429), 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) [2023-11-06 22:02:11,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:11,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 445 [2023-11-06 22:02:11,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:02:12,327 INFO L124 PetriNetUnfolderBase]: 3305/5715 cut-off events. [2023-11-06 22:02:12,327 INFO L125 PetriNetUnfolderBase]: For 569/569 co-relation queries the response was YES. [2023-11-06 22:02:12,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11067 conditions, 5715 events. 3305/5715 cut-off events. For 569/569 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 33697 event pairs, 3078 based on Foata normal form. 12/4698 useless extension candidates. Maximal degree in co-relation 10930. Up to 5168 conditions per place. [2023-11-06 22:02:12,368 INFO L140 encePairwiseOnDemand]: 442/445 looper letters, 47 selfloop transitions, 23 changer transitions 0/78 dead transitions. [2023-11-06 22:02:12,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 78 transitions, 476 flow [2023-11-06 22:02:12,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:02:12,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-06 22:02:12,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5266 transitions. [2023-11-06 22:02:12,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49307116104868914 [2023-11-06 22:02:12,389 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5266 transitions. [2023-11-06 22:02:12,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5266 transitions. [2023-11-06 22:02:12,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:02:12,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5266 transitions. [2023-11-06 22:02:12,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 219.41666666666666) internal successors, (5266), 24 states have internal predecessors, (5266), 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) [2023-11-06 22:02:12,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 445.0) internal successors, (11125), 25 states have internal predecessors, (11125), 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) [2023-11-06 22:02:12,438 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 445.0) internal successors, (11125), 25 states have internal predecessors, (11125), 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) [2023-11-06 22:02:12,438 INFO L175 Difference]: Start difference. First operand has 82 places, 66 transitions, 240 flow. Second operand 24 states and 5266 transitions. [2023-11-06 22:02:12,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 78 transitions, 476 flow [2023-11-06 22:02:12,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 78 transitions, 404 flow, removed 31 selfloop flow, removed 5 redundant places. [2023-11-06 22:02:12,447 INFO L231 Difference]: Finished difference. Result has 112 places, 78 transitions, 360 flow [2023-11-06 22:02:12,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=360, PETRI_PLACES=112, PETRI_TRANSITIONS=78} [2023-11-06 22:02:12,450 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 55 predicate places. [2023-11-06 22:02:12,450 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 78 transitions, 360 flow [2023-11-06 22:02:12,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 217.16) internal successors, (5429), 25 states have internal predecessors, (5429), 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) [2023-11-06 22:02:12,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:12,454 INFO L208 CegarLoopForPetriNet]: trace histogram [22, 2, 1, 1, 1, 1, 1] [2023-11-06 22:02:12,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:12,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d59bc39-9639-4284-adad-24e1013be752/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:12,680 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 22:02:12,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:12,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1112677938, now seen corresponding path program 4 times [2023-11-06 22:02:12,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:12,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602405704] [2023-11-06 22:02:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:12,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat