./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 cf1a7837 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_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/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_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --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-cf1a783 [2023-11-12 02:09:48,853 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:09:48,969 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:09:48,975 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:09:48,976 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:09:49,006 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:09:49,007 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:09:49,007 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:09:49,008 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:09:49,009 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:09:49,010 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:09:49,011 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:09:49,011 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:09:49,012 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:09:49,013 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:09:49,013 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:09:49,014 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:09:49,015 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:09:49,015 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:09:49,016 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:09:49,016 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:09:49,021 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:09:49,021 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:09:49,022 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:09:49,022 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:09:49,023 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:09:49,023 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:09:49,024 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:09:49,025 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:09:49,025 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:09:49,025 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:09:49,026 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:09:49,026 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:09:49,026 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:09:49,027 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:09:49,027 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:09:49,027 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:09:49,027 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:09:49,027 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:09:49,028 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_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a [2023-11-12 02:09:49,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:09:49,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:09:49,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:09:49,440 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:09:49,441 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:09:49,442 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2023-11-12 02:09:52,838 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:09:53,129 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:09:53,130 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2023-11-12 02:09:53,149 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/data/5b007b2d5/141487b1adef499ebb1134133ff2b431/FLAGd7836d0ab [2023-11-12 02:09:53,163 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/data/5b007b2d5/141487b1adef499ebb1134133ff2b431 [2023-11-12 02:09:53,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:09:53,167 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:09:53,169 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:09:53,169 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:09:53,179 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:09:53,180 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:09:53" (1/1) ... [2023-11-12 02:09:53,181 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57dfb3c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:53, skipping insertion in model container [2023-11-12 02:09:53,181 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:09:53" (1/1) ... [2023-11-12 02:09:53,237 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:09:53,766 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_62ca5a56-e48b-4008-9405-d050df81285f/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i[47038,47051] [2023-11-12 02:09:53,837 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:09:53,957 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:09:53,993 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_62ca5a56-e48b-4008-9405-d050df81285f/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i[47038,47051] [2023-11-12 02:09:54,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:09:54,078 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:09:54,079 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:54 WrapperNode [2023-11-12 02:09:54,079 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:09:54,081 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:09:54,081 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:09:54,082 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:09:54,090 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:54" (1/1) ... [2023-11-12 02:09:54,116 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:54" (1/1) ... [2023-11-12 02:09:54,158 INFO L138 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 236 [2023-11-12 02:09:54,159 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:09:54,160 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:09:54,160 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:09:54,160 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:09:54,172 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:54" (1/1) ... [2023-11-12 02:09:54,172 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:54" (1/1) ... [2023-11-12 02:09:54,178 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:54" (1/1) ... [2023-11-12 02:09:54,179 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:54" (1/1) ... [2023-11-12 02:09:54,194 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:54" (1/1) ... [2023-11-12 02:09:54,206 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:54" (1/1) ... [2023-11-12 02:09:54,211 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:54" (1/1) ... [2023-11-12 02:09:54,213 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:54" (1/1) ... [2023-11-12 02:09:54,221 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:09:54,222 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:09:54,222 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:09:54,222 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:09:54,223 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:54" (1/1) ... [2023-11-12 02:09:54,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:09:54,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:09:54,271 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:09:54,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:09:54,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:09:54,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 02:09:54,338 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-11-12 02:09:54,339 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-11-12 02:09:54,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:09:54,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:09:54,339 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-11-12 02:09:54,339 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-11-12 02:09:54,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:09:54,340 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-12 02:09:54,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:09:54,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:09:54,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 02:09:54,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:09:54,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:09:54,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:09:54,343 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:09:54,597 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:09:54,599 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:09:55,179 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:09:55,192 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:09:55,193 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-12 02:09:55,196 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:09:55 BoogieIcfgContainer [2023-11-12 02:09:55,196 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:09:55,200 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:09:55,200 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:09:55,204 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:09:55,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:09:53" (1/3) ... [2023-11-12 02:09:55,205 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71718ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:09:55, skipping insertion in model container [2023-11-12 02:09:55,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:09:54" (2/3) ... [2023-11-12 02:09:55,206 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71718ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:09:55, skipping insertion in model container [2023-11-12 02:09:55,206 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:09:55" (3/3) ... [2023-11-12 02:09:55,207 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing.i [2023-11-12 02:09:55,217 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:09:55,230 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:09:55,231 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:09:55,231 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:09:55,395 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-12 02:09:55,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 247 transitions, 514 flow [2023-11-12 02:09:55,717 INFO L124 PetriNetUnfolderBase]: 54/466 cut-off events. [2023-11-12 02:09:55,717 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-12 02:09:55,730 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. [2023-11-12 02:09:55,731 INFO L82 GeneralOperation]: Start removeDead. Operand has 227 places, 247 transitions, 514 flow [2023-11-12 02:09:55,742 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 227 places, 245 transitions, 504 flow [2023-11-12 02:09:55,746 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:09:55,759 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 227 places, 245 transitions, 504 flow [2023-11-12 02:09:55,762 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 227 places, 245 transitions, 504 flow [2023-11-12 02:09:55,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 227 places, 245 transitions, 504 flow [2023-11-12 02:09:55,878 INFO L124 PetriNetUnfolderBase]: 50/454 cut-off events. [2023-11-12 02:09:55,878 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:09:55,887 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. [2023-11-12 02:09:55,908 INFO L119 LiptonReduction]: Number of co-enabled transitions 18738 [2023-11-12 02:10:04,842 INFO L134 LiptonReduction]: Checked pairs total: 26059 [2023-11-12 02:10:04,842 INFO L136 LiptonReduction]: Total number of compositions: 198 [2023-11-12 02:10:04,859 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:10:04,867 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;@68600d8e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:10:04,867 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-12 02:10:04,875 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:10:04,875 INFO L124 PetriNetUnfolderBase]: 1/27 cut-off events. [2023-11-12 02:10:04,875 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:10:04,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:10:04,876 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-12 02:10:04,877 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)] === [2023-11-12 02:10:04,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:04,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1894194674, now seen corresponding path program 1 times [2023-11-12 02:10:04,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:04,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981558501] [2023-11-12 02:10:04,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:04,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:10:05,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:05,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981558501] [2023-11-12 02:10:05,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981558501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:10:05,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:10:05,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:10:05,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472952956] [2023-11-12 02:10:05,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:10:05,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:10:05,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:05,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:10:05,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:10:05,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 445 [2023-11-12 02:10:05,343 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) [2023-11-12 02:10:05,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:10:05,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 445 [2023-11-12 02:10:05,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:10:06,433 INFO L124 PetriNetUnfolderBase]: 3305/5694 cut-off events. [2023-11-12 02:10:06,433 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2023-11-12 02:10:06,444 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. [2023-11-12 02:10:06,468 INFO L140 encePairwiseOnDemand]: 430/445 looper letters, 47 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-11-12 02:10:06,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 226 flow [2023-11-12 02:10:06,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:10:06,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:10:06,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 713 transitions. [2023-11-12 02:10:06,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340823970037453 [2023-11-12 02:10:06,494 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 713 transitions. [2023-11-12 02:10:06,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 713 transitions. [2023-11-12 02:10:06,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:10:06,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 713 transitions. [2023-11-12 02:10:06,509 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) [2023-11-12 02:10:06,519 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) [2023-11-12 02:10:06,521 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) [2023-11-12 02:10:06,523 INFO L175 Difference]: Start difference. First operand has 57 places, 69 transitions, 152 flow. Second operand 3 states and 713 transitions. [2023-11-12 02:10:06,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 226 flow [2023-11-12 02:10:06,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 226 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:10:06,534 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 138 flow [2023-11-12 02:10:06,537 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} [2023-11-12 02:10:06,541 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2023-11-12 02:10:06,541 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 138 flow [2023-11-12 02:10:06,543 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) [2023-11-12 02:10:06,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:10:06,543 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-12 02:10:06,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:10:06,544 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)] === [2023-11-12 02:10:06,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:06,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1362715464, now seen corresponding path program 1 times [2023-11-12 02:10:06,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:06,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234889669] [2023-11-12 02:10:06,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:06,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:10:06,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:06,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234889669] [2023-11-12 02:10:06,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234889669] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:10:06,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466181828] [2023-11-12 02:10:06,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:06,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:06,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:06,743 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:06,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:10:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:06,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:10:06,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:10:06,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:10:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:10:07,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466181828] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:10:07,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:10:07,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 02:10:07,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515722636] [2023-11-12 02:10:07,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:10:07,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:10:07,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:07,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:10:07,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:10:07,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 445 [2023-11-12 02:10:07,075 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) [2023-11-12 02:10:07,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:10:07,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 445 [2023-11-12 02:10:07,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:10:08,194 INFO L124 PetriNetUnfolderBase]: 3305/5697 cut-off events. [2023-11-12 02:10:08,197 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2023-11-12 02:10:08,208 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. [2023-11-12 02:10:08,230 INFO L140 encePairwiseOnDemand]: 442/445 looper letters, 47 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-11-12 02:10:08,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 60 transitions, 254 flow [2023-11-12 02:10:08,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:10:08,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:10:08,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1351 transitions. [2023-11-12 02:10:08,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059925093632959 [2023-11-12 02:10:08,237 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1351 transitions. [2023-11-12 02:10:08,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1351 transitions. [2023-11-12 02:10:08,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:10:08,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1351 transitions. [2023-11-12 02:10:08,249 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) [2023-11-12 02:10:08,256 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) [2023-11-12 02:10:08,259 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) [2023-11-12 02:10:08,259 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 138 flow. Second operand 6 states and 1351 transitions. [2023-11-12 02:10:08,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 60 transitions, 254 flow [2023-11-12 02:10:08,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 60 transitions, 250 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-12 02:10:08,265 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 170 flow [2023-11-12 02:10:08,265 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} [2023-11-12 02:10:08,267 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 9 predicate places. [2023-11-12 02:10:08,267 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 170 flow [2023-11-12 02:10:08,269 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) [2023-11-12 02:10:08,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:10:08,269 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-11-12 02:10:08,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:08,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:08,476 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)] === [2023-11-12 02:10:08,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:08,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1405902990, now seen corresponding path program 2 times [2023-11-12 02:10:08,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:08,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370890387] [2023-11-12 02:10:08,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:08,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:10:08,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:08,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370890387] [2023-11-12 02:10:08,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370890387] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:10:08,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396070367] [2023-11-12 02:10:08,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:10:08,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:08,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:08,844 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:08,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:10:09,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:10:09,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:10:09,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:10:09,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:10:09,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:10:09,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:10:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:10:09,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396070367] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:10:09,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:10:09,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-12 02:10:09,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169977518] [2023-11-12 02:10:09,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:10:09,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:10:09,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:10:09,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:10:09,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:10:09,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 445 [2023-11-12 02:10:09,245 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) [2023-11-12 02:10:09,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:10:09,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 445 [2023-11-12 02:10:09,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:10:10,593 INFO L124 PetriNetUnfolderBase]: 3305/5703 cut-off events. [2023-11-12 02:10:10,593 INFO L125 PetriNetUnfolderBase]: For 126/126 co-relation queries the response was YES. [2023-11-12 02:10:10,613 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. [2023-11-12 02:10:10,638 INFO L140 encePairwiseOnDemand]: 442/445 looper letters, 47 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2023-11-12 02:10:10,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 66 transitions, 322 flow [2023-11-12 02:10:10,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-12 02:10:10,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-12 02:10:10,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2656 transitions. [2023-11-12 02:10:10,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49737827715355803 [2023-11-12 02:10:10,651 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2656 transitions. [2023-11-12 02:10:10,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2656 transitions. [2023-11-12 02:10:10,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:10:10,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2656 transitions. [2023-11-12 02:10:10,663 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) [2023-11-12 02:10:10,676 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) [2023-11-12 02:10:10,682 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) [2023-11-12 02:10:10,682 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 170 flow. Second operand 12 states and 2656 transitions. [2023-11-12 02:10:10,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 66 transitions, 322 flow [2023-11-12 02:10:10,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 66 transitions, 308 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-12 02:10:10,691 INFO L231 Difference]: Finished difference. Result has 82 places, 66 transitions, 240 flow [2023-11-12 02:10:10,691 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} [2023-11-12 02:10:10,693 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2023-11-12 02:10:10,693 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 66 transitions, 240 flow [2023-11-12 02:10:10,695 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) [2023-11-12 02:10:10,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:10:10,695 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-11-12 02:10:10,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:10:10,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:10,903 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)] === [2023-11-12 02:10:10,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:10:10,903 INFO L85 PathProgramCache]: Analyzing trace with hash 800163406, now seen corresponding path program 3 times [2023-11-12 02:10:10,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:10:10,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222067083] [2023-11-12 02:10:10,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:10:10,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:10:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:10:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:10:11,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:10:11,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222067083] [2023-11-12 02:10:11,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222067083] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:10:11,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827415271] [2023-11-12 02:10:11,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:10:11,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:10:11,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:10:11,548 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:10:11,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62ca5a56-e48b-4008-9405-d050df81285f/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process