./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/singleton_with-uninit-problems.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3425d890-2f65-49de-9095-4db9eaee52e5/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3425d890-2f65-49de-9095-4db9eaee52e5/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3425d890-2f65-49de-9095-4db9eaee52e5/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3425d890-2f65-49de-9095-4db9eaee52e5/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/singleton_with-uninit-problems.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3425d890-2f65-49de-9095-4db9eaee52e5/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3425d890-2f65-49de-9095-4db9eaee52e5/bin/uautomizer-verify-uCwYo4JHxu --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 9556b3eb7217f056a72a299bf0514e64606a248fa454b59dcc03e4a2e74c7c90 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:05:00,622 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:05:00,751 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3425d890-2f65-49de-9095-4db9eaee52e5/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 08:05:00,762 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:05:00,764 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:05:00,812 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:05:00,814 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:05:00,815 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:05:00,816 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:05:00,822 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:05:00,823 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:05:00,823 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:05:00,824 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:05:00,826 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:05:00,826 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:05:00,827 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:05:00,828 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:05:00,828 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:05:00,829 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 08:05:00,829 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 08:05:00,830 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 08:05:00,830 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:05:00,831 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 08:05:00,831 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 08:05:00,832 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:05:00,832 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:05:00,833 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:05:00,834 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:05:00,834 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:05:00,835 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:05:00,836 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:05:00,837 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:05:00,837 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:05:00,837 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:05:00,838 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:05:00,838 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:05:00,838 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:05:00,839 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:05:00,839 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_3425d890-2f65-49de-9095-4db9eaee52e5/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3425d890-2f65-49de-9095-4db9eaee52e5/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9556b3eb7217f056a72a299bf0514e64606a248fa454b59dcc03e4a2e74c7c90 [2023-11-19 08:05:01,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:05:01,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:05:01,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:05:01,208 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:05:01,209 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:05:01,211 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3425d890-2f65-49de-9095-4db9eaee52e5/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread/singleton_with-uninit-problems.i [2023-11-19 08:05:04,336 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:05:04,756 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:05:04,757 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3425d890-2f65-49de-9095-4db9eaee52e5/sv-benchmarks/c/pthread/singleton_with-uninit-problems.i [2023-11-19 08:05:04,787 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3425d890-2f65-49de-9095-4db9eaee52e5/bin/uautomizer-verify-uCwYo4JHxu/data/999fc905e/cbe968ea433844c3bf5819933f6eb039/FLAGc47c3b833 [2023-11-19 08:05:04,814 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3425d890-2f65-49de-9095-4db9eaee52e5/bin/uautomizer-verify-uCwYo4JHxu/data/999fc905e/cbe968ea433844c3bf5819933f6eb039 [2023-11-19 08:05:04,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:05:04,825 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:05:04,832 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:05:04,832 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:05:04,838 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:05:04,839 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:05:04" (1/1) ... [2023-11-19 08:05:04,841 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12158fa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:04, skipping insertion in model container [2023-11-19 08:05:04,841 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:05:04" (1/1) ... [2023-11-19 08:05:04,911 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:05:05,170 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 08:05:05,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:05:05,623 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:05:05,657 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-19 08:05:05,710 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:05:05,796 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:05:05,796 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:05:05,797 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:05:05,804 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:05:05,805 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:05 WrapperNode [2023-11-19 08:05:05,805 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:05:05,806 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:05:05,807 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:05:05,807 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:05:05,814 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:05" (1/1) ... [2023-11-19 08:05:05,839 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:05" (1/1) ... [2023-11-19 08:05:05,868 INFO L138 Inliner]: procedures = 325, calls = 54, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 43 [2023-11-19 08:05:05,868 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:05:05,869 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:05:05,869 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:05:05,869 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:05:05,904 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:05" (1/1) ... [2023-11-19 08:05:05,910 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:05" (1/1) ... [2023-11-19 08:05:05,915 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:05" (1/1) ... [2023-11-19 08:05:05,924 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:05" (1/1) ... [2023-11-19 08:05:05,935 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:05" (1/1) ... [2023-11-19 08:05:05,961 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:05" (1/1) ... [2023-11-19 08:05:05,964 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:05" (1/1) ... [2023-11-19 08:05:05,966 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:05" (1/1) ... [2023-11-19 08:05:05,970 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:05:05,983 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:05:05,984 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:05:05,984 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:05:05,985 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:05" (1/1) ... [2023-11-19 08:05:05,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:05:06,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3425d890-2f65-49de-9095-4db9eaee52e5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:06,035 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3425d890-2f65-49de-9095-4db9eaee52e5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:05:06,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3425d890-2f65-49de-9095-4db9eaee52e5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:05:06,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 08:05:06,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:05:06,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:05:06,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 08:05:06,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:05:06,068 INFO L130 BoogieDeclarations]: Found specification of procedure thread0 [2023-11-19 08:05:06,068 INFO L138 BoogieDeclarations]: Found implementation of procedure thread0 [2023-11-19 08:05:06,068 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 08:05:06,068 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 08:05:06,068 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 08:05:06,068 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 08:05:06,069 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 08:05:06,069 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 08:05:06,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:05:06,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 08:05:06,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:05:06,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:05:06,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:05:06,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:05:06,071 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:05:06,249 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:05:06,252 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:05:06,667 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:05:06,711 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:05:06,716 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 08:05:06,721 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:05:06 BoogieIcfgContainer [2023-11-19 08:05:06,722 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:05:06,726 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:05:06,727 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:05:06,731 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:05:06,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:05:04" (1/3) ... [2023-11-19 08:05:06,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c579c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:05:06, skipping insertion in model container [2023-11-19 08:05:06,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:05:05" (2/3) ... [2023-11-19 08:05:06,735 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c579c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:05:06, skipping insertion in model container [2023-11-19 08:05:06,735 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:05:06" (3/3) ... [2023-11-19 08:05:06,737 INFO L112 eAbstractionObserver]: Analyzing ICFG singleton_with-uninit-problems.i [2023-11-19 08:05:06,761 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:05:06,761 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-11-19 08:05:06,762 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:05:06,981 INFO L144 ThreadInstanceAdder]: Constructed 21 joinOtherThreadTransitions. [2023-11-19 08:05:07,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 258 transitions, 613 flow [2023-11-19 08:05:07,148 INFO L124 PetriNetUnfolderBase]: 8/179 cut-off events. [2023-11-19 08:05:07,148 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 08:05:07,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 179 events. 8/179 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 191 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 154. Up to 3 conditions per place. [2023-11-19 08:05:07,156 INFO L82 GeneralOperation]: Start removeDead. Operand has 266 places, 258 transitions, 613 flow [2023-11-19 08:05:07,165 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 185 places, 174 transitions, 399 flow [2023-11-19 08:05:07,169 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:05:07,182 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 185 places, 174 transitions, 399 flow [2023-11-19 08:05:07,186 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 185 places, 174 transitions, 399 flow [2023-11-19 08:05:07,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 174 transitions, 399 flow [2023-11-19 08:05:07,256 INFO L124 PetriNetUnfolderBase]: 8/174 cut-off events. [2023-11-19 08:05:07,256 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 08:05:07,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 174 events. 8/174 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 191 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 149. Up to 3 conditions per place. [2023-11-19 08:05:07,265 INFO L119 LiptonReduction]: Number of co-enabled transitions 2920 [2023-11-19 08:05:12,671 INFO L134 LiptonReduction]: Checked pairs total: 7843 [2023-11-19 08:05:12,672 INFO L136 LiptonReduction]: Total number of compositions: 151 [2023-11-19 08:05:12,690 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:05:12,697 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;@428c1f26, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:05:12,698 INFO L358 AbstractCegarLoop]: Starting to check reachability of 73 error locations. [2023-11-19 08:05:12,700 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:05:12,700 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-19 08:05:12,700 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:05:12,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:12,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 08:05:12,702 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-19 08:05:12,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:12,708 INFO L85 PathProgramCache]: Analyzing trace with hash 683, now seen corresponding path program 1 times [2023-11-19 08:05:12,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:12,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965770339] [2023-11-19 08:05:12,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:12,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:12,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:12,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:12,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965770339] [2023-11-19 08:05:12,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965770339] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:12,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:12,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 08:05:12,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664708016] [2023-11-19 08:05:12,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:12,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:05:12,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:12,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:05:12,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:05:12,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 411 [2023-11-19 08:05:12,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 87 transitions, 225 flow. Second operand has 2 states, 2 states have (on average 214.5) internal successors, (429), 2 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:12,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:12,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 411 [2023-11-19 08:05:12,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:16,605 INFO L124 PetriNetUnfolderBase]: 19442/26672 cut-off events. [2023-11-19 08:05:16,606 INFO L125 PetriNetUnfolderBase]: For 961/961 co-relation queries the response was YES. [2023-11-19 08:05:16,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53375 conditions, 26672 events. 19442/26672 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 145263 event pairs, 19098 based on Foata normal form. 0/9489 useless extension candidates. Maximal degree in co-relation 53350. Up to 25317 conditions per place. [2023-11-19 08:05:16,872 INFO L140 encePairwiseOnDemand]: 407/411 looper letters, 65 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2023-11-19 08:05:16,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 83 transitions, 347 flow [2023-11-19 08:05:16,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:05:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 08:05:16,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 497 transitions. [2023-11-19 08:05:16,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046228710462287 [2023-11-19 08:05:16,891 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 497 transitions. [2023-11-19 08:05:16,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 497 transitions. [2023-11-19 08:05:16,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:16,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 497 transitions. [2023-11-19 08:05:16,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 248.5) internal successors, (497), 2 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:16,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 411.0) internal successors, (1233), 3 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:16,911 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 411.0) internal successors, (1233), 3 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:16,913 INFO L175 Difference]: Start difference. First operand has 101 places, 87 transitions, 225 flow. Second operand 2 states and 497 transitions. [2023-11-19 08:05:16,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 83 transitions, 347 flow [2023-11-19 08:05:16,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 313 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-11-19 08:05:16,969 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 183 flow [2023-11-19 08:05:16,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=183, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2023-11-19 08:05:16,976 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -15 predicate places. [2023-11-19 08:05:16,976 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 183 flow [2023-11-19 08:05:16,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 214.5) internal successors, (429), 2 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:16,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:16,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 08:05:16,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:05:16,978 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-19 08:05:16,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:16,982 INFO L85 PathProgramCache]: Analyzing trace with hash 670712, now seen corresponding path program 1 times [2023-11-19 08:05:16,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:16,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578105735] [2023-11-19 08:05:16,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:16,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:17,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:17,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578105735] [2023-11-19 08:05:17,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578105735] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:17,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:17,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:05:17,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792111806] [2023-11-19 08:05:17,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:17,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:17,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:17,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:17,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:17,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 411 [2023-11-19 08:05:17,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:17,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:17,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 411 [2023-11-19 08:05:17,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:21,177 INFO L124 PetriNetUnfolderBase]: 23211/32262 cut-off events. [2023-11-19 08:05:21,178 INFO L125 PetriNetUnfolderBase]: For 346/346 co-relation queries the response was YES. [2023-11-19 08:05:21,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63265 conditions, 32262 events. 23211/32262 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 2114. Compared 186219 event pairs, 19840 based on Foata normal form. 0/11517 useless extension candidates. Maximal degree in co-relation 63262. Up to 23874 conditions per place. [2023-11-19 08:05:21,445 INFO L140 encePairwiseOnDemand]: 399/411 looper letters, 121 selfloop transitions, 11 changer transitions 0/147 dead transitions. [2023-11-19 08:05:21,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 147 transitions, 591 flow [2023-11-19 08:05:21,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:21,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:21,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 733 transitions. [2023-11-19 08:05:21,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944849959448499 [2023-11-19 08:05:21,455 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 733 transitions. [2023-11-19 08:05:21,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 733 transitions. [2023-11-19 08:05:21,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:21,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 733 transitions. [2023-11-19 08:05:21,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.33333333333334) internal successors, (733), 3 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:21,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:21,470 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:21,472 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 183 flow. Second operand 3 states and 733 transitions. [2023-11-19 08:05:21,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 147 transitions, 591 flow [2023-11-19 08:05:21,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 147 transitions, 591 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:05:21,489 INFO L231 Difference]: Finished difference. Result has 90 places, 92 transitions, 265 flow [2023-11-19 08:05:21,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=265, PETRI_PLACES=90, PETRI_TRANSITIONS=92} [2023-11-19 08:05:21,490 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -11 predicate places. [2023-11-19 08:05:21,491 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 92 transitions, 265 flow [2023-11-19 08:05:21,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:21,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:21,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 08:05:21,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:05:21,493 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-19 08:05:21,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:21,496 INFO L85 PathProgramCache]: Analyzing trace with hash 670711, now seen corresponding path program 1 times [2023-11-19 08:05:21,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:21,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682185427] [2023-11-19 08:05:21,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:21,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:21,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:21,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682185427] [2023-11-19 08:05:21,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682185427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:21,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:21,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:05:21,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620963854] [2023-11-19 08:05:21,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:21,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:21,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:21,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:21,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:21,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 411 [2023-11-19 08:05:21,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 265 flow. Second operand has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:21,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:21,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 411 [2023-11-19 08:05:21,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:24,542 INFO L124 PetriNetUnfolderBase]: 17985/25242 cut-off events. [2023-11-19 08:05:24,543 INFO L125 PetriNetUnfolderBase]: For 6158/6158 co-relation queries the response was YES. [2023-11-19 08:05:24,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53936 conditions, 25242 events. 17985/25242 cut-off events. For 6158/6158 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 143797 event pairs, 17620 based on Foata normal form. 1462/12457 useless extension candidates. Maximal degree in co-relation 53931. Up to 23826 conditions per place. [2023-11-19 08:05:24,727 INFO L140 encePairwiseOnDemand]: 402/411 looper letters, 74 selfloop transitions, 8 changer transitions 0/103 dead transitions. [2023-11-19 08:05:24,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 103 transitions, 462 flow [2023-11-19 08:05:24,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:24,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:24,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 662 transitions. [2023-11-19 08:05:24,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369018653690186 [2023-11-19 08:05:24,731 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 662 transitions. [2023-11-19 08:05:24,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 662 transitions. [2023-11-19 08:05:24,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:24,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 662 transitions. [2023-11-19 08:05:24,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:24,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:24,741 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:24,741 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 265 flow. Second operand 3 states and 662 transitions. [2023-11-19 08:05:24,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 103 transitions, 462 flow [2023-11-19 08:05:24,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 103 transitions, 436 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:05:24,757 INFO L231 Difference]: Finished difference. Result has 92 places, 98 transitions, 305 flow [2023-11-19 08:05:24,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=305, PETRI_PLACES=92, PETRI_TRANSITIONS=98} [2023-11-19 08:05:24,759 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -9 predicate places. [2023-11-19 08:05:24,760 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 98 transitions, 305 flow [2023-11-19 08:05:24,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:24,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:24,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 08:05:24,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:05:24,766 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-19 08:05:24,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:24,767 INFO L85 PathProgramCache]: Analyzing trace with hash 20790115, now seen corresponding path program 1 times [2023-11-19 08:05:24,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:24,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198115967] [2023-11-19 08:05:24,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:24,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:25,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:25,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198115967] [2023-11-19 08:05:25,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198115967] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:25,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:25,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:05:25,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796530527] [2023-11-19 08:05:25,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:25,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:05:25,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:25,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:05:25,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:05:25,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 411 [2023-11-19 08:05:25,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 98 transitions, 305 flow. Second operand has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:25,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:25,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 411 [2023-11-19 08:05:25,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:26,970 INFO L124 PetriNetUnfolderBase]: 12756/18205 cut-off events. [2023-11-19 08:05:26,970 INFO L125 PetriNetUnfolderBase]: For 6088/6088 co-relation queries the response was YES. [2023-11-19 08:05:27,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38670 conditions, 18205 events. 12756/18205 cut-off events. For 6088/6088 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 102825 event pairs, 12482 based on Foata normal form. 1469/8987 useless extension candidates. Maximal degree in co-relation 38664. Up to 17141 conditions per place. [2023-11-19 08:05:27,097 INFO L140 encePairwiseOnDemand]: 402/411 looper letters, 70 selfloop transitions, 10 changer transitions 0/101 dead transitions. [2023-11-19 08:05:27,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 101 transitions, 470 flow [2023-11-19 08:05:27,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:05:27,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:05:27,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 844 transitions. [2023-11-19 08:05:27,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51338199513382 [2023-11-19 08:05:27,103 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 844 transitions. [2023-11-19 08:05:27,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 844 transitions. [2023-11-19 08:05:27,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:27,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 844 transitions. [2023-11-19 08:05:27,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:27,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 411.0) internal successors, (2055), 5 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:27,116 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 411.0) internal successors, (2055), 5 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:27,116 INFO L175 Difference]: Start difference. First operand has 92 places, 98 transitions, 305 flow. Second operand 4 states and 844 transitions. [2023-11-19 08:05:27,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 101 transitions, 470 flow [2023-11-19 08:05:27,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 101 transitions, 454 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:05:27,126 INFO L231 Difference]: Finished difference. Result has 92 places, 97 transitions, 305 flow [2023-11-19 08:05:27,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=305, PETRI_PLACES=92, PETRI_TRANSITIONS=97} [2023-11-19 08:05:27,128 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -9 predicate places. [2023-11-19 08:05:27,128 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 97 transitions, 305 flow [2023-11-19 08:05:27,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:27,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:27,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:27,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:05:27,131 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-19 08:05:27,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:27,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1372956886, now seen corresponding path program 1 times [2023-11-19 08:05:27,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:27,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703114191] [2023-11-19 08:05:27,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:27,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:27,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:27,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703114191] [2023-11-19 08:05:27,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703114191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:27,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:27,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:05:27,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063142994] [2023-11-19 08:05:27,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:27,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:05:27,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:27,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:05:27,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:05:28,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 411 [2023-11-19 08:05:28,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 97 transitions, 305 flow. Second operand has 4 states, 4 states have (on average 195.5) internal successors, (782), 4 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:28,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:28,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 411 [2023-11-19 08:05:28,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:29,774 INFO L124 PetriNetUnfolderBase]: 12745/18177 cut-off events. [2023-11-19 08:05:29,774 INFO L125 PetriNetUnfolderBase]: For 4610/4610 co-relation queries the response was YES. [2023-11-19 08:05:29,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38596 conditions, 18177 events. 12745/18177 cut-off events. For 4610/4610 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 102705 event pairs, 12471 based on Foata normal form. 0/7509 useless extension candidates. Maximal degree in co-relation 38590. Up to 17103 conditions per place. [2023-11-19 08:05:29,883 INFO L140 encePairwiseOnDemand]: 404/411 looper letters, 69 selfloop transitions, 4 changer transitions 0/93 dead transitions. [2023-11-19 08:05:29,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 93 transitions, 443 flow [2023-11-19 08:05:29,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:05:29,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:05:29,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 844 transitions. [2023-11-19 08:05:29,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51338199513382 [2023-11-19 08:05:29,888 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 844 transitions. [2023-11-19 08:05:29,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 844 transitions. [2023-11-19 08:05:29,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:29,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 844 transitions. [2023-11-19 08:05:29,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:29,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 411.0) internal successors, (2055), 5 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:29,899 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 411.0) internal successors, (2055), 5 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:29,900 INFO L175 Difference]: Start difference. First operand has 92 places, 97 transitions, 305 flow. Second operand 4 states and 844 transitions. [2023-11-19 08:05:29,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 93 transitions, 443 flow [2023-11-19 08:05:29,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 430 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:05:29,907 INFO L231 Difference]: Finished difference. Result has 89 places, 91 transitions, 281 flow [2023-11-19 08:05:29,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=281, PETRI_PLACES=89, PETRI_TRANSITIONS=91} [2023-11-19 08:05:29,908 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -12 predicate places. [2023-11-19 08:05:29,908 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 91 transitions, 281 flow [2023-11-19 08:05:29,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 195.5) internal successors, (782), 4 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:29,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:29,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:29,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 08:05:29,910 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-19 08:05:29,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:29,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1932864346, now seen corresponding path program 1 times [2023-11-19 08:05:29,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:29,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395518728] [2023-11-19 08:05:29,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:29,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:30,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:30,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395518728] [2023-11-19 08:05:30,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395518728] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:30,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:30,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:05:30,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093731062] [2023-11-19 08:05:30,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:30,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:05:30,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:30,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:05:30,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:05:30,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 411 [2023-11-19 08:05:30,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 91 transitions, 281 flow. Second operand has 6 states, 6 states have (on average 195.83333333333334) internal successors, (1175), 6 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:30,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:30,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 411 [2023-11-19 08:05:30,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:31,995 INFO L124 PetriNetUnfolderBase]: 7622/11511 cut-off events. [2023-11-19 08:05:31,996 INFO L125 PetriNetUnfolderBase]: For 3065/3065 co-relation queries the response was YES. [2023-11-19 08:05:32,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24236 conditions, 11511 events. 7622/11511 cut-off events. For 3065/3065 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 66132 event pairs, 7349 based on Foata normal form. 0/5456 useless extension candidates. Maximal degree in co-relation 24230. Up to 10435 conditions per place. [2023-11-19 08:05:32,066 INFO L140 encePairwiseOnDemand]: 404/411 looper letters, 66 selfloop transitions, 5 changer transitions 0/90 dead transitions. [2023-11-19 08:05:32,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 90 transitions, 432 flow [2023-11-19 08:05:32,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:05:32,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:05:32,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 840 transitions. [2023-11-19 08:05:32,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5109489051094891 [2023-11-19 08:05:32,072 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 840 transitions. [2023-11-19 08:05:32,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 840 transitions. [2023-11-19 08:05:32,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:32,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 840 transitions. [2023-11-19 08:05:32,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:32,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 411.0) internal successors, (2055), 5 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:32,084 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 411.0) internal successors, (2055), 5 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:32,085 INFO L175 Difference]: Start difference. First operand has 89 places, 91 transitions, 281 flow. Second operand 4 states and 840 transitions. [2023-11-19 08:05:32,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 90 transitions, 432 flow [2023-11-19 08:05:32,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 90 transitions, 424 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 08:05:32,093 INFO L231 Difference]: Finished difference. Result has 85 places, 87 transitions, 275 flow [2023-11-19 08:05:32,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=275, PETRI_PLACES=85, PETRI_TRANSITIONS=87} [2023-11-19 08:05:32,094 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -16 predicate places. [2023-11-19 08:05:32,095 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 87 transitions, 275 flow [2023-11-19 08:05:32,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 195.83333333333334) internal successors, (1175), 6 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:32,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:32,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:32,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 08:05:32,097 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-19 08:05:32,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:32,097 INFO L85 PathProgramCache]: Analyzing trace with hash 2056778211, now seen corresponding path program 1 times [2023-11-19 08:05:32,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:32,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176604928] [2023-11-19 08:05:32,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:32,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:32,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:32,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176604928] [2023-11-19 08:05:32,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176604928] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:32,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:32,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:05:32,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886126291] [2023-11-19 08:05:32,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:32,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:05:32,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:32,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:05:32,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:05:32,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 411 [2023-11-19 08:05:32,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 transitions, 275 flow. Second operand has 5 states, 5 states have (on average 196.6) internal successors, (983), 5 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:32,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:32,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 411 [2023-11-19 08:05:32,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:33,992 INFO L124 PetriNetUnfolderBase]: 8092/11573 cut-off events. [2023-11-19 08:05:33,995 INFO L125 PetriNetUnfolderBase]: For 3184/3184 co-relation queries the response was YES. [2023-11-19 08:05:34,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25049 conditions, 11573 events. 8092/11573 cut-off events. For 3184/3184 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 59802 event pairs, 7820 based on Foata normal form. 0/5650 useless extension candidates. Maximal degree in co-relation 25043. Up to 11072 conditions per place. [2023-11-19 08:05:34,052 INFO L140 encePairwiseOnDemand]: 404/411 looper letters, 65 selfloop transitions, 5 changer transitions 0/86 dead transitions. [2023-11-19 08:05:34,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 86 transitions, 424 flow [2023-11-19 08:05:34,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:05:34,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:05:34,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 839 transitions. [2023-11-19 08:05:34,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5103406326034063 [2023-11-19 08:05:34,057 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 839 transitions. [2023-11-19 08:05:34,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 839 transitions. [2023-11-19 08:05:34,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:34,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 839 transitions. [2023-11-19 08:05:34,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 209.75) internal successors, (839), 4 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:34,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 411.0) internal successors, (2055), 5 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:34,066 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 411.0) internal successors, (2055), 5 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:34,067 INFO L175 Difference]: Start difference. First operand has 85 places, 87 transitions, 275 flow. Second operand 4 states and 839 transitions. [2023-11-19 08:05:34,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 86 transitions, 424 flow [2023-11-19 08:05:34,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 86 transitions, 414 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 08:05:34,075 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 267 flow [2023-11-19 08:05:34,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=267, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2023-11-19 08:05:34,076 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -20 predicate places. [2023-11-19 08:05:34,077 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 267 flow [2023-11-19 08:05:34,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.6) internal successors, (983), 5 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:34,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:34,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:34,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 08:05:34,078 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-19 08:05:34,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:34,079 INFO L85 PathProgramCache]: Analyzing trace with hash 2056778167, now seen corresponding path program 1 times [2023-11-19 08:05:34,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:34,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183289734] [2023-11-19 08:05:34,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:34,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:34,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:34,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183289734] [2023-11-19 08:05:34,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183289734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:34,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:34,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:05:34,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158546830] [2023-11-19 08:05:34,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:34,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:34,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:34,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:34,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:34,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 411 [2023-11-19 08:05:34,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 267 flow. Second operand has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:34,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:34,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 411 [2023-11-19 08:05:34,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:34,741 INFO L124 PetriNetUnfolderBase]: 2562/4006 cut-off events. [2023-11-19 08:05:34,741 INFO L125 PetriNetUnfolderBase]: For 1207/1207 co-relation queries the response was YES. [2023-11-19 08:05:34,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8629 conditions, 4006 events. 2562/4006 cut-off events. For 1207/1207 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 19261 event pairs, 2424 based on Foata normal form. 0/2436 useless extension candidates. Maximal degree in co-relation 8623. Up to 3617 conditions per place. [2023-11-19 08:05:34,759 INFO L140 encePairwiseOnDemand]: 404/411 looper letters, 58 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2023-11-19 08:05:34,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 81 transitions, 391 flow [2023-11-19 08:05:34,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:34,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:34,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 647 transitions. [2023-11-19 08:05:34,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247364152473641 [2023-11-19 08:05:34,763 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 647 transitions. [2023-11-19 08:05:34,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 647 transitions. [2023-11-19 08:05:34,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:34,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 647 transitions. [2023-11-19 08:05:34,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:34,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:34,771 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:34,771 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 267 flow. Second operand 3 states and 647 transitions. [2023-11-19 08:05:34,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 81 transitions, 391 flow [2023-11-19 08:05:34,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 81 transitions, 381 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 08:05:34,775 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 257 flow [2023-11-19 08:05:34,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=257, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2023-11-19 08:05:34,776 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -25 predicate places. [2023-11-19 08:05:34,777 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 257 flow [2023-11-19 08:05:34,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:34,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:34,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:34,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 08:05:34,778 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-19 08:05:34,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:34,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1200282222, now seen corresponding path program 1 times [2023-11-19 08:05:34,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:34,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5481269] [2023-11-19 08:05:34,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:34,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:34,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:34,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5481269] [2023-11-19 08:05:34,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5481269] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:34,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:34,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:05:34,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268541862] [2023-11-19 08:05:34,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:34,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:34,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:34,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:34,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:34,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 411 [2023-11-19 08:05:34,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 257 flow. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:34,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:34,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 411 [2023-11-19 08:05:34,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:35,167 INFO L124 PetriNetUnfolderBase]: 566/1062 cut-off events. [2023-11-19 08:05:35,167 INFO L125 PetriNetUnfolderBase]: For 389/389 co-relation queries the response was YES. [2023-11-19 08:05:35,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2356 conditions, 1062 events. 566/1062 cut-off events. For 389/389 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4177 event pairs, 503 based on Foata normal form. 0/905 useless extension candidates. Maximal degree in co-relation 2350. Up to 904 conditions per place. [2023-11-19 08:05:35,174 INFO L140 encePairwiseOnDemand]: 405/411 looper letters, 61 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-11-19 08:05:35,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 381 flow [2023-11-19 08:05:35,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:35,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:35,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 667 transitions. [2023-11-19 08:05:35,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409570154095702 [2023-11-19 08:05:35,180 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 667 transitions. [2023-11-19 08:05:35,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 667 transitions. [2023-11-19 08:05:35,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:35,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 667 transitions. [2023-11-19 08:05:35,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:35,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:35,187 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:35,187 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 257 flow. Second operand 3 states and 667 transitions. [2023-11-19 08:05:35,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 381 flow [2023-11-19 08:05:35,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 76 transitions, 373 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:05:35,190 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 243 flow [2023-11-19 08:05:35,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=243, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2023-11-19 08:05:35,191 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -30 predicate places. [2023-11-19 08:05:35,191 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 243 flow [2023-11-19 08:05:35,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:35,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:35,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:35,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 08:05:35,192 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-19 08:05:35,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:35,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1874932304, now seen corresponding path program 1 times [2023-11-19 08:05:35,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:35,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092210816] [2023-11-19 08:05:35,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:35,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:35,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:35,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092210816] [2023-11-19 08:05:35,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092210816] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:35,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:35,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:05:35,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423697476] [2023-11-19 08:05:35,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:35,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:35,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:35,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:35,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:35,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 411 [2023-11-19 08:05:35,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 243 flow. Second operand has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:35,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:35,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 411 [2023-11-19 08:05:35,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:35,639 INFO L124 PetriNetUnfolderBase]: 566/1038 cut-off events. [2023-11-19 08:05:35,640 INFO L125 PetriNetUnfolderBase]: For 381/381 co-relation queries the response was YES. [2023-11-19 08:05:35,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2320 conditions, 1038 events. 566/1038 cut-off events. For 381/381 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3926 event pairs, 506 based on Foata normal form. 0/914 useless extension candidates. Maximal degree in co-relation 2314. Up to 875 conditions per place. [2023-11-19 08:05:35,645 INFO L140 encePairwiseOnDemand]: 407/411 looper letters, 55 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2023-11-19 08:05:35,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 73 transitions, 361 flow [2023-11-19 08:05:35,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:35,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:35,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 640 transitions. [2023-11-19 08:05:35,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519059205190592 [2023-11-19 08:05:35,648 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 640 transitions. [2023-11-19 08:05:35,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 640 transitions. [2023-11-19 08:05:35,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:35,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 640 transitions. [2023-11-19 08:05:35,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:35,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:35,656 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:35,656 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 243 flow. Second operand 3 states and 640 transitions. [2023-11-19 08:05:35,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 73 transitions, 361 flow [2023-11-19 08:05:35,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 73 transitions, 359 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:05:35,659 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 243 flow [2023-11-19 08:05:35,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=243, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2023-11-19 08:05:35,660 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -31 predicate places. [2023-11-19 08:05:35,661 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 243 flow [2023-11-19 08:05:35,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:35,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:35,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:35,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 08:05:35,662 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-19 08:05:35,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:35,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1874932303, now seen corresponding path program 1 times [2023-11-19 08:05:35,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:35,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667856351] [2023-11-19 08:05:35,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:35,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:35,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:35,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667856351] [2023-11-19 08:05:35,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667856351] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:35,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:35,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:05:35,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967533701] [2023-11-19 08:05:35,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:35,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:05:35,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:35,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:05:35,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:05:36,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 411 [2023-11-19 08:05:36,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 243 flow. Second operand has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:36,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:36,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 411 [2023-11-19 08:05:36,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:36,554 INFO L124 PetriNetUnfolderBase]: 550/998 cut-off events. [2023-11-19 08:05:36,554 INFO L125 PetriNetUnfolderBase]: For 370/370 co-relation queries the response was YES. [2023-11-19 08:05:36,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2250 conditions, 998 events. 550/998 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3697 event pairs, 489 based on Foata normal form. 0/886 useless extension candidates. Maximal degree in co-relation 2244. Up to 847 conditions per place. [2023-11-19 08:05:36,560 INFO L140 encePairwiseOnDemand]: 406/411 looper letters, 54 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2023-11-19 08:05:36,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 73 transitions, 374 flow [2023-11-19 08:05:36,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:05:36,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:05:36,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 826 transitions. [2023-11-19 08:05:36,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024330900243309 [2023-11-19 08:05:36,565 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 826 transitions. [2023-11-19 08:05:36,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 826 transitions. [2023-11-19 08:05:36,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:36,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 826 transitions. [2023-11-19 08:05:36,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 206.5) internal successors, (826), 4 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:36,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 411.0) internal successors, (2055), 5 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:36,574 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 411.0) internal successors, (2055), 5 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:36,574 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 243 flow. Second operand 4 states and 826 transitions. [2023-11-19 08:05:36,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 73 transitions, 374 flow [2023-11-19 08:05:36,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 73 transitions, 368 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:05:36,578 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 243 flow [2023-11-19 08:05:36,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=243, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2023-11-19 08:05:36,579 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -32 predicate places. [2023-11-19 08:05:36,579 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 243 flow [2023-11-19 08:05:36,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 196.8) internal successors, (984), 5 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:36,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:36,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:36,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 08:05:36,581 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-19 08:05:36,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:36,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1468089004, now seen corresponding path program 1 times [2023-11-19 08:05:36,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:36,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148713313] [2023-11-19 08:05:36,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:36,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:36,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:36,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148713313] [2023-11-19 08:05:36,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148713313] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:36,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:36,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:05:36,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579298191] [2023-11-19 08:05:36,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:36,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:36,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:36,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:36,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:36,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 411 [2023-11-19 08:05:36,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 243 flow. Second operand has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:36,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:36,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 411 [2023-11-19 08:05:36,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:36,986 INFO L124 PetriNetUnfolderBase]: 495/913 cut-off events. [2023-11-19 08:05:36,986 INFO L125 PetriNetUnfolderBase]: For 344/344 co-relation queries the response was YES. [2023-11-19 08:05:36,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2062 conditions, 913 events. 495/913 cut-off events. For 344/344 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3300 event pairs, 435 based on Foata normal form. 0/837 useless extension candidates. Maximal degree in co-relation 2056. Up to 758 conditions per place. [2023-11-19 08:05:36,991 INFO L140 encePairwiseOnDemand]: 407/411 looper letters, 51 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2023-11-19 08:05:36,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 69 transitions, 353 flow [2023-11-19 08:05:36,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:36,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:36,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 637 transitions. [2023-11-19 08:05:36,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166261151662611 [2023-11-19 08:05:36,994 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 637 transitions. [2023-11-19 08:05:36,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 637 transitions. [2023-11-19 08:05:36,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:36,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 637 transitions. [2023-11-19 08:05:36,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:37,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:37,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 411.0) internal successors, (1644), 4 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:37,002 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 243 flow. Second operand 3 states and 637 transitions. [2023-11-19 08:05:37,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 69 transitions, 353 flow [2023-11-19 08:05:37,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 69 transitions, 343 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 08:05:37,005 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 235 flow [2023-11-19 08:05:37,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=235, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2023-11-19 08:05:37,006 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -35 predicate places. [2023-11-19 08:05:37,006 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 235 flow [2023-11-19 08:05:37,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:37,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:37,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:37,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 08:05:37,008 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-19 08:05:37,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:37,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1468089002, now seen corresponding path program 1 times [2023-11-19 08:05:37,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:37,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373049393] [2023-11-19 08:05:37,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:37,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:37,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:37,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:37,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373049393] [2023-11-19 08:05:37,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373049393] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:37,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:37,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:05:37,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963304579] [2023-11-19 08:05:37,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:37,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:05:37,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:37,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:05:37,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:05:37,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 411 [2023-11-19 08:05:37,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 235 flow. Second operand has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:37,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:37,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 411 [2023-11-19 08:05:37,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:37,574 INFO L124 PetriNetUnfolderBase]: 451/839 cut-off events. [2023-11-19 08:05:37,574 INFO L125 PetriNetUnfolderBase]: For 321/321 co-relation queries the response was YES. [2023-11-19 08:05:37,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1899 conditions, 839 events. 451/839 cut-off events. For 321/321 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2943 event pairs, 390 based on Foata normal form. 0/787 useless extension candidates. Maximal degree in co-relation 1893. Up to 690 conditions per place. [2023-11-19 08:05:37,579 INFO L140 encePairwiseOnDemand]: 406/411 looper letters, 50 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-11-19 08:05:37,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 69 transitions, 358 flow [2023-11-19 08:05:37,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:05:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:05:37,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 823 transitions. [2023-11-19 08:05:37,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5006082725060828 [2023-11-19 08:05:37,584 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 823 transitions. [2023-11-19 08:05:37,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 823 transitions. [2023-11-19 08:05:37,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:37,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 823 transitions. [2023-11-19 08:05:37,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.75) internal successors, (823), 4 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:37,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 411.0) internal successors, (2055), 5 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:37,591 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 411.0) internal successors, (2055), 5 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:37,592 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 235 flow. Second operand 4 states and 823 transitions. [2023-11-19 08:05:37,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 69 transitions, 358 flow [2023-11-19 08:05:37,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 69 transitions, 352 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:05:37,595 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 235 flow [2023-11-19 08:05:37,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=235, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2023-11-19 08:05:37,596 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -36 predicate places. [2023-11-19 08:05:37,596 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 235 flow [2023-11-19 08:05:37,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:37,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:37,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:37,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 08:05:37,597 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-19 08:05:37,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:37,598 INFO L85 PathProgramCache]: Analyzing trace with hash 2042274665, now seen corresponding path program 1 times [2023-11-19 08:05:37,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:37,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085834969] [2023-11-19 08:05:37,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:37,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:38,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:38,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085834969] [2023-11-19 08:05:38,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085834969] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:38,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:38,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-19 08:05:38,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188463381] [2023-11-19 08:05:38,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:38,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 08:05:38,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:38,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 08:05:38,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-19 08:05:40,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 411 [2023-11-19 08:05:40,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 235 flow. Second operand has 15 states, 15 states have (on average 173.2) internal successors, (2598), 15 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:40,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:40,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 411 [2023-11-19 08:05:40,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:41,146 INFO L124 PetriNetUnfolderBase]: 510/897 cut-off events. [2023-11-19 08:05:41,147 INFO L125 PetriNetUnfolderBase]: For 331/331 co-relation queries the response was YES. [2023-11-19 08:05:41,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2087 conditions, 897 events. 510/897 cut-off events. For 331/331 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3001 event pairs, 447 based on Foata normal form. 1/846 useless extension candidates. Maximal degree in co-relation 2081. Up to 778 conditions per place. [2023-11-19 08:05:41,151 INFO L140 encePairwiseOnDemand]: 401/411 looper letters, 55 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2023-11-19 08:05:41,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 72 transitions, 389 flow [2023-11-19 08:05:41,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:05:41,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:05:41,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1085 transitions. [2023-11-19 08:05:41,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4399837793998378 [2023-11-19 08:05:41,157 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1085 transitions. [2023-11-19 08:05:41,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1085 transitions. [2023-11-19 08:05:41,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:41,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1085 transitions. [2023-11-19 08:05:41,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 180.83333333333334) internal successors, (1085), 6 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:41,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 411.0) internal successors, (2877), 7 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:41,185 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 411.0) internal successors, (2877), 7 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:41,185 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 235 flow. Second operand 6 states and 1085 transitions. [2023-11-19 08:05:41,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 72 transitions, 389 flow [2023-11-19 08:05:41,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 72 transitions, 379 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 08:05:41,189 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 270 flow [2023-11-19 08:05:41,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2023-11-19 08:05:41,190 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -32 predicate places. [2023-11-19 08:05:41,190 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 270 flow [2023-11-19 08:05:41,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 173.2) internal successors, (2598), 15 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:41,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:41,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:41,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 08:05:41,192 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-19 08:05:41,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:41,193 INFO L85 PathProgramCache]: Analyzing trace with hash 346777241, now seen corresponding path program 1 times [2023-11-19 08:05:41,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:41,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088461120] [2023-11-19 08:05:41,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:41,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:42,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:42,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088461120] [2023-11-19 08:05:42,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088461120] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:42,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:42,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-19 08:05:42,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432085072] [2023-11-19 08:05:42,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:42,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 08:05:42,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:42,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 08:05:42,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2023-11-19 08:05:43,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 411 [2023-11-19 08:05:43,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 270 flow. Second operand has 15 states, 15 states have (on average 173.26666666666668) internal successors, (2599), 15 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:43,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:43,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 411 [2023-11-19 08:05:43,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:43,892 INFO L124 PetriNetUnfolderBase]: 444/830 cut-off events. [2023-11-19 08:05:43,892 INFO L125 PetriNetUnfolderBase]: For 351/351 co-relation queries the response was YES. [2023-11-19 08:05:43,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1905 conditions, 830 events. 444/830 cut-off events. For 351/351 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2928 event pairs, 381 based on Foata normal form. 1/779 useless extension candidates. Maximal degree in co-relation 1898. Up to 671 conditions per place. [2023-11-19 08:05:43,896 INFO L140 encePairwiseOnDemand]: 397/411 looper letters, 48 selfloop transitions, 20 changer transitions 0/77 dead transitions. [2023-11-19 08:05:43,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 77 transitions, 455 flow [2023-11-19 08:05:43,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 08:05:43,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 08:05:43,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1941 transitions. [2023-11-19 08:05:43,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42932979429329793 [2023-11-19 08:05:43,905 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1941 transitions. [2023-11-19 08:05:43,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1941 transitions. [2023-11-19 08:05:43,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:43,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1941 transitions. [2023-11-19 08:05:43,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 176.45454545454547) internal successors, (1941), 11 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:43,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 411.0) internal successors, (4932), 12 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:43,923 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 411.0) internal successors, (4932), 12 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:43,923 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 270 flow. Second operand 11 states and 1941 transitions. [2023-11-19 08:05:43,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 77 transitions, 455 flow [2023-11-19 08:05:43,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 446 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 08:05:43,927 INFO L231 Difference]: Finished difference. Result has 78 places, 68 transitions, 326 flow [2023-11-19 08:05:43,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=326, PETRI_PLACES=78, PETRI_TRANSITIONS=68} [2023-11-19 08:05:43,929 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -23 predicate places. [2023-11-19 08:05:43,929 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 68 transitions, 326 flow [2023-11-19 08:05:43,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 173.26666666666668) internal successors, (2599), 15 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:43,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:43,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:43,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 08:05:43,932 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-19 08:05:43,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:43,933 INFO L85 PathProgramCache]: Analyzing trace with hash -2134809654, now seen corresponding path program 1 times [2023-11-19 08:05:43,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:43,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669396400] [2023-11-19 08:05:43,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:43,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:44,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:44,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669396400] [2023-11-19 08:05:44,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669396400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:44,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:44,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-19 08:05:44,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926425347] [2023-11-19 08:05:44,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:44,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 08:05:44,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:44,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 08:05:44,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2023-11-19 08:05:46,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 411 [2023-11-19 08:05:46,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 68 transitions, 326 flow. Second operand has 15 states, 15 states have (on average 173.26666666666668) internal successors, (2599), 15 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:46,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:46,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 411 [2023-11-19 08:05:46,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:46,365 INFO L124 PetriNetUnfolderBase]: 443/828 cut-off events. [2023-11-19 08:05:46,366 INFO L125 PetriNetUnfolderBase]: For 388/388 co-relation queries the response was YES. [2023-11-19 08:05:46,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1937 conditions, 828 events. 443/828 cut-off events. For 388/388 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2924 event pairs, 380 based on Foata normal form. 1/777 useless extension candidates. Maximal degree in co-relation 1928. Up to 671 conditions per place. [2023-11-19 08:05:46,370 INFO L140 encePairwiseOnDemand]: 397/411 looper letters, 48 selfloop transitions, 21 changer transitions 0/78 dead transitions. [2023-11-19 08:05:46,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 78 transitions, 516 flow [2023-11-19 08:05:46,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 08:05:46,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 08:05:46,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2112 transitions. [2023-11-19 08:05:46,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4282238442822384 [2023-11-19 08:05:46,380 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2112 transitions. [2023-11-19 08:05:46,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2112 transitions. [2023-11-19 08:05:46,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:46,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2112 transitions. [2023-11-19 08:05:46,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 176.0) internal successors, (2112), 12 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:46,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 411.0) internal successors, (5343), 13 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:46,402 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 411.0) internal successors, (5343), 13 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:46,403 INFO L175 Difference]: Start difference. First operand has 78 places, 68 transitions, 326 flow. Second operand 12 states and 2112 transitions. [2023-11-19 08:05:46,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 78 transitions, 516 flow [2023-11-19 08:05:46,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 78 transitions, 487 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-19 08:05:46,408 INFO L231 Difference]: Finished difference. Result has 83 places, 69 transitions, 366 flow [2023-11-19 08:05:46,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=411, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=366, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2023-11-19 08:05:46,409 INFO L281 CegarLoopForPetriNet]: 101 programPoint places, -18 predicate places. [2023-11-19 08:05:46,409 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 366 flow [2023-11-19 08:05:46,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 173.26666666666668) internal successors, (2599), 15 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:46,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:46,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:46,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-19 08:05:46,411 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 70 more)] === [2023-11-19 08:05:46,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:46,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1754591327, now seen corresponding path program 1 times [2023-11-19 08:05:46,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:46,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87961351] [2023-11-19 08:05:46,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:46,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat