./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 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_6e575d09-70c7-46a6-84f8-aeeacfb81f72/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e575d09-70c7-46a6-84f8-aeeacfb81f72/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e575d09-70c7-46a6-84f8-aeeacfb81f72/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e575d09-70c7-46a6-84f8-aeeacfb81f72/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e575d09-70c7-46a6-84f8-aeeacfb81f72/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e575d09-70c7-46a6-84f8-aeeacfb81f72/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:43:44,701 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:43:44,804 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e575d09-70c7-46a6-84f8-aeeacfb81f72/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-23 22:43:44,810 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:43:44,811 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:43:44,838 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:43:44,839 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:43:44,839 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:43:44,840 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:43:44,841 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:43:44,842 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:43:44,842 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:43:44,843 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:43:44,843 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:43:44,844 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:43:44,845 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:43:44,845 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:43:44,846 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:43:44,846 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 22:43:44,847 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 22:43:44,847 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 22:43:44,848 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:43:44,848 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 22:43:44,849 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 22:43:44,849 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:43:44,849 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:43:44,850 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:43:44,850 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:43:44,851 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:43:44,851 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:43:44,852 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:43:44,852 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:43:44,853 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:43:44,853 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:43:44,853 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:43:44,854 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:43:44,854 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:43:44,854 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:43:44,855 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:43:44,855 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_6e575d09-70c7-46a6-84f8-aeeacfb81f72/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e575d09-70c7-46a6-84f8-aeeacfb81f72/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f [2023-11-23 22:43:45,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:43:45,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:43:45,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:43:45,234 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:43:45,235 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:43:45,236 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e575d09-70c7-46a6-84f8-aeeacfb81f72/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2023-11-23 22:43:48,365 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:43:48,786 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:43:48,787 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e575d09-70c7-46a6-84f8-aeeacfb81f72/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2023-11-23 22:43:48,818 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e575d09-70c7-46a6-84f8-aeeacfb81f72/bin/uautomizer-verify-zZY32mL2XJ/data/747922aa3/5daafa89c5b64e009b81d105259cb9f1/FLAG0d3924142 [2023-11-23 22:43:48,833 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e575d09-70c7-46a6-84f8-aeeacfb81f72/bin/uautomizer-verify-zZY32mL2XJ/data/747922aa3/5daafa89c5b64e009b81d105259cb9f1 [2023-11-23 22:43:48,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:43:48,839 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:43:48,841 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:43:48,841 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:43:48,848 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:43:48,851 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:43:48" (1/1) ... [2023-11-23 22:43:48,853 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56fba4c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:48, skipping insertion in model container [2023-11-23 22:43:48,853 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:43:48" (1/1) ... [2023-11-23 22:43:48,923 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:43:49,942 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:43:49,967 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:43:50,098 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:43:50,248 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:43:50,249 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:43:50,257 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:43:50,258 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:50 WrapperNode [2023-11-23 22:43:50,258 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:43:50,259 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:43:50,259 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:43:50,259 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:43:50,270 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:50" (1/1) ... [2023-11-23 22:43:50,313 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:50" (1/1) ... [2023-11-23 22:43:50,430 INFO L138 Inliner]: procedures = 490, calls = 133, calls flagged for inlining = 48, calls inlined = 122, statements flattened = 1873 [2023-11-23 22:43:50,430 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:43:50,431 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:43:50,431 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:43:50,431 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:43:50,444 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:50" (1/1) ... [2023-11-23 22:43:50,445 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:50" (1/1) ... [2023-11-23 22:43:50,488 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:50" (1/1) ... [2023-11-23 22:43:50,496 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:50" (1/1) ... [2023-11-23 22:43:50,601 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:50" (1/1) ... [2023-11-23 22:43:50,611 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:50" (1/1) ... [2023-11-23 22:43:50,637 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:50" (1/1) ... [2023-11-23 22:43:50,656 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:50" (1/1) ... [2023-11-23 22:43:50,674 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:43:50,675 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:43:50,675 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:43:50,675 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:43:50,676 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:50" (1/1) ... [2023-11-23 22:43:50,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:43:50,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e575d09-70c7-46a6-84f8-aeeacfb81f72/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:43:50,723 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e575d09-70c7-46a6-84f8-aeeacfb81f72/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:43:50,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e575d09-70c7-46a6-84f8-aeeacfb81f72/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:43:50,776 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2023-11-23 22:43:50,777 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2023-11-23 22:43:50,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 22:43:50,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:43:50,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 22:43:50,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 22:43:50,779 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-23 22:43:50,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:43:50,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 22:43:50,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:43:50,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:43:50,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:43:50,781 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 22:43:50,781 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-23 22:43:50,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 22:43:50,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 22:43:50,787 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:43:51,238 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:43:51,241 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:43:54,336 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:43:56,820 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:43:56,820 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-23 22:43:56,822 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:43:56 BoogieIcfgContainer [2023-11-23 22:43:56,822 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:43:56,827 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:43:56,828 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:43:56,832 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:43:56,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:43:48" (1/3) ... [2023-11-23 22:43:56,834 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e72f427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:43:56, skipping insertion in model container [2023-11-23 22:43:56,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:43:50" (2/3) ... [2023-11-23 22:43:56,836 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e72f427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:43:56, skipping insertion in model container [2023-11-23 22:43:56,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:43:56" (3/3) ... [2023-11-23 22:43:56,838 INFO L112 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-2.i [2023-11-23 22:43:56,861 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:43:56,862 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 520 error locations. [2023-11-23 22:43:56,863 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:43:57,199 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-23 22:43:57,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 808 places, 857 transitions, 1721 flow [2023-11-23 22:43:57,795 INFO L124 PetriNetUnfolderBase]: 98/1609 cut-off events. [2023-11-23 22:43:57,796 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-23 22:43:57,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1614 conditions, 1609 events. 98/1609 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 12378 event pairs, 0 based on Foata normal form. 0/528 useless extension candidates. Maximal degree in co-relation 826. Up to 4 conditions per place. [2023-11-23 22:43:57,827 INFO L82 GeneralOperation]: Start removeDead. Operand has 808 places, 857 transitions, 1721 flow [2023-11-23 22:43:57,883 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 808 places, 857 transitions, 1721 flow [2023-11-23 22:43:57,901 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:43:57,921 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@9ff40a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:43:57,922 INFO L358 AbstractCegarLoop]: Starting to check reachability of 565 error locations. [2023-11-23 22:43:57,924 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:43:57,926 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-23 22:43:57,926 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 22:43:57,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:43:57,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-23 22:43:57,928 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [StealerErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 562 more)] === [2023-11-23 22:43:57,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:43:57,935 INFO L85 PathProgramCache]: Analyzing trace with hash 196754, now seen corresponding path program 1 times [2023-11-23 22:43:57,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:43:57,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676627218] [2023-11-23 22:43:57,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:43:57,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:43:58,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:43:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:43:58,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:43:58,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676627218] [2023-11-23 22:43:58,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676627218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:43:58,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:43:58,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:43:58,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328534721] [2023-11-23 22:43:58,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:43:58,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:43:58,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:43:58,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:43:58,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:43:59,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 857 [2023-11-23 22:43:59,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 808 places, 857 transitions, 1721 flow. Second operand has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 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) [2023-11-23 22:43:59,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:43:59,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 857 [2023-11-23 22:43:59,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:44:07,065 INFO L124 PetriNetUnfolderBase]: 17609/39700 cut-off events. [2023-11-23 22:44:07,066 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-11-23 22:44:07,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72676 conditions, 39700 events. 17609/39700 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 371660 event pairs, 9679 based on Foata normal form. 425/23141 useless extension candidates. Maximal degree in co-relation 71586. Up to 32393 conditions per place. [2023-11-23 22:44:07,321 INFO L140 encePairwiseOnDemand]: 650/857 looper letters, 505 selfloop transitions, 6 changer transitions 0/692 dead transitions. [2023-11-23 22:44:07,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 692 transitions, 2413 flow [2023-11-23 22:44:07,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:44:07,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:44:07,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1275 transitions. [2023-11-23 22:44:07,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959159859976663 [2023-11-23 22:44:07,345 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1275 transitions. [2023-11-23 22:44:07,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1275 transitions. [2023-11-23 22:44:07,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:44:07,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1275 transitions. [2023-11-23 22:44:07,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 425.0) internal successors, (1275), 3 states have internal predecessors, (1275), 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) [2023-11-23 22:44:07,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 857.0) internal successors, (3428), 4 states have internal predecessors, (3428), 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) [2023-11-23 22:44:07,379 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 857.0) internal successors, (3428), 4 states have internal predecessors, (3428), 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) [2023-11-23 22:44:07,381 INFO L175 Difference]: Start difference. First operand has 808 places, 857 transitions, 1721 flow. Second operand 3 states and 1275 transitions. [2023-11-23 22:44:07,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 692 transitions, 2413 flow [2023-11-23 22:44:07,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 692 transitions, 2413 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 22:44:07,415 INFO L231 Difference]: Finished difference. Result has 615 places, 656 transitions, 1347 flow [2023-11-23 22:44:07,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=857, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1347, PETRI_PLACES=615, PETRI_TRANSITIONS=656} [2023-11-23 22:44:07,423 INFO L281 CegarLoopForPetriNet]: 808 programPoint places, -193 predicate places. [2023-11-23 22:44:07,423 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 656 transitions, 1347 flow [2023-11-23 22:44:07,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 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) [2023-11-23 22:44:07,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:44:07,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-23 22:44:07,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:44:07,426 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [StealerErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 562 more)] === [2023-11-23 22:44:07,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:44:07,427 INFO L85 PathProgramCache]: Analyzing trace with hash 196755, now seen corresponding path program 1 times [2023-11-23 22:44:07,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:44:07,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222134733] [2023-11-23 22:44:07,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:44:07,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:44:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:44:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:44:07,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:44:07,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222134733] [2023-11-23 22:44:07,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222134733] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:44:07,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:44:07,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:44:07,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681853596] [2023-11-23 22:44:07,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:44:07,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:44:07,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:44:07,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:44:07,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:44:07,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 857 [2023-11-23 22:44:07,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 656 transitions, 1347 flow. Second operand has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 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) [2023-11-23 22:44:07,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:44:07,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 857 [2023-11-23 22:44:07,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:44:14,129 INFO L124 PetriNetUnfolderBase]: 16704/38284 cut-off events. [2023-11-23 22:44:14,130 INFO L125 PetriNetUnfolderBase]: For 804/807 co-relation queries the response was YES. [2023-11-23 22:44:14,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70530 conditions, 38284 events. 16704/38284 cut-off events. For 804/807 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 361473 event pairs, 12775 based on Foata normal form. 2/21934 useless extension candidates. Maximal degree in co-relation 69441. Up to 31187 conditions per place. [2023-11-23 22:44:14,370 INFO L140 encePairwiseOnDemand]: 850/857 looper letters, 473 selfloop transitions, 4 changer transitions 0/668 dead transitions. [2023-11-23 22:44:14,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 668 transitions, 2328 flow [2023-11-23 22:44:14,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:44:14,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:44:14,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1057 transitions. [2023-11-23 22:44:14,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.411124076234928 [2023-11-23 22:44:14,377 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1057 transitions. [2023-11-23 22:44:14,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1057 transitions. [2023-11-23 22:44:14,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:44:14,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1057 transitions. [2023-11-23 22:44:14,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 352.3333333333333) internal successors, (1057), 3 states have internal predecessors, (1057), 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) [2023-11-23 22:44:14,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 857.0) internal successors, (3428), 4 states have internal predecessors, (3428), 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) [2023-11-23 22:44:14,394 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 857.0) internal successors, (3428), 4 states have internal predecessors, (3428), 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) [2023-11-23 22:44:14,395 INFO L175 Difference]: Start difference. First operand has 615 places, 656 transitions, 1347 flow. Second operand 3 states and 1057 transitions. [2023-11-23 22:44:14,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 668 transitions, 2328 flow [2023-11-23 22:44:14,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 613 places, 668 transitions, 2321 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:44:14,421 INFO L231 Difference]: Finished difference. Result has 614 places, 656 transitions, 1359 flow [2023-11-23 22:44:14,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=857, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1359, PETRI_PLACES=614, PETRI_TRANSITIONS=656} [2023-11-23 22:44:14,424 INFO L281 CegarLoopForPetriNet]: 808 programPoint places, -194 predicate places. [2023-11-23 22:44:14,424 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 656 transitions, 1359 flow [2023-11-23 22:44:14,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 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) [2023-11-23 22:44:14,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:44:14,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-23 22:44:14,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:44:14,430 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [StealerErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 562 more)] === [2023-11-23 22:44:14,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:44:14,431 INFO L85 PathProgramCache]: Analyzing trace with hash 189296300, now seen corresponding path program 1 times [2023-11-23 22:44:14,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:44:14,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383647765] [2023-11-23 22:44:14,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:44:14,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:44:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:44:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:44:14,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:44:14,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383647765] [2023-11-23 22:44:14,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383647765] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:44:14,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:44:14,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:44:14,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582551317] [2023-11-23 22:44:14,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:44:14,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:44:14,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:44:14,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:44:14,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:44:14,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 857 [2023-11-23 22:44:14,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 656 transitions, 1359 flow. Second operand has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 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) [2023-11-23 22:44:14,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:44:14,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 857 [2023-11-23 22:44:14,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:44:26,490 INFO L124 PetriNetUnfolderBase]: 32271/71977 cut-off events. [2023-11-23 22:44:26,490 INFO L125 PetriNetUnfolderBase]: For 1546/1548 co-relation queries the response was YES. [2023-11-23 22:44:26,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135436 conditions, 71977 events. 32271/71977 cut-off events. For 1546/1548 co-relation queries the response was YES. Maximal size of possible extension queue 941. Compared 744593 event pairs, 7600 based on Foata normal form. 1/43837 useless extension candidates. Maximal degree in co-relation 134320. Up to 32321 conditions per place. [2023-11-23 22:44:26,850 INFO L140 encePairwiseOnDemand]: 662/857 looper letters, 889 selfloop transitions, 200 changer transitions 0/1251 dead transitions. [2023-11-23 22:44:26,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 1251 transitions, 4758 flow [2023-11-23 22:44:26,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:44:26,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 22:44:26,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1973 transitions. [2023-11-23 22:44:26,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604434072345391 [2023-11-23 22:44:26,860 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1973 transitions. [2023-11-23 22:44:26,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1973 transitions. [2023-11-23 22:44:26,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:44:26,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1973 transitions. [2023-11-23 22:44:26,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 394.6) internal successors, (1973), 5 states have internal predecessors, (1973), 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) [2023-11-23 22:44:26,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 857.0) internal successors, (5142), 6 states have internal predecessors, (5142), 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) [2023-11-23 22:44:26,883 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 857.0) internal successors, (5142), 6 states have internal predecessors, (5142), 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) [2023-11-23 22:44:26,884 INFO L175 Difference]: Start difference. First operand has 614 places, 656 transitions, 1359 flow. Second operand 5 states and 1973 transitions. [2023-11-23 22:44:26,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 1251 transitions, 4758 flow [2023-11-23 22:44:26,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 1251 transitions, 4753 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:44:26,916 INFO L231 Difference]: Finished difference. Result has 619 places, 832 transitions, 2929 flow [2023-11-23 22:44:26,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=857, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2929, PETRI_PLACES=619, PETRI_TRANSITIONS=832} [2023-11-23 22:44:26,920 INFO L281 CegarLoopForPetriNet]: 808 programPoint places, -189 predicate places. [2023-11-23 22:44:26,920 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 832 transitions, 2929 flow [2023-11-23 22:44:26,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 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) [2023-11-23 22:44:26,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:44:26,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-23 22:44:26,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:44:26,922 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [StealerErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 562 more)] === [2023-11-23 22:44:26,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:44:26,924 INFO L85 PathProgramCache]: Analyzing trace with hash 189296301, now seen corresponding path program 1 times [2023-11-23 22:44:26,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:44:26,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802901152] [2023-11-23 22:44:26,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:44:26,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:44:26,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:44:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:44:27,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:44:27,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802901152] [2023-11-23 22:44:27,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802901152] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:44:27,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:44:27,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:44:27,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718727825] [2023-11-23 22:44:27,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:44:27,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:44:27,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:44:27,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:44:27,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:44:27,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 857 [2023-11-23 22:44:27,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 832 transitions, 2929 flow. Second operand has 4 states, 4 states have (on average 194.75) internal successors, (779), 4 states have internal predecessors, (779), 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) [2023-11-23 22:44:27,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:44:27,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 857 [2023-11-23 22:44:27,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand