./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr-deref.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr-deref.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya --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 12bbf3623faa1d8cb0ae406b9406d293839854c20d2fb62622ec841c419248fb --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 03:32:26,491 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 03:32:26,551 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 03:32:26,556 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 03:32:26,557 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 03:32:26,577 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 03:32:26,578 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 03:32:26,578 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 03:32:26,579 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 03:32:26,580 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 03:32:26,580 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 03:32:26,581 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 03:32:26,582 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 03:32:26,582 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 03:32:26,583 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 03:32:26,583 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 03:32:26,584 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 03:32:26,584 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 03:32:26,585 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 03:32:26,585 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 03:32:26,586 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 03:32:26,588 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 03:32:26,589 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 03:32:26,589 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 03:32:26,590 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 03:32:26,590 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 03:32:26,591 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 03:32:26,591 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 03:32:26,592 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 03:32:26,592 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 03:32:26,593 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 03:32:26,593 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 03:32:26,593 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:32:26,594 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 03:32:26,594 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 03:32:26,594 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 03:32:26,594 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 03:32:26,594 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 03:32:26,595 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 03:32:26,595 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 03:32:26,595 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 03:32:26,595 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_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 12bbf3623faa1d8cb0ae406b9406d293839854c20d2fb62622ec841c419248fb [2023-11-29 03:32:26,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 03:32:26,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 03:32:26,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 03:32:26,839 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 03:32:26,839 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 03:32:26,840 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr-deref.i [2023-11-29 03:32:29,624 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 03:32:29,858 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 03:32:29,859 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/sv-benchmarks/c/goblint-regression/09-regions_19-nested_nr-deref.i [2023-11-29 03:32:29,879 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/data/95b210758/c4d1910e6214451e90ead4cb83b31cff/FLAGae6ce6210 [2023-11-29 03:32:29,894 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/data/95b210758/c4d1910e6214451e90ead4cb83b31cff [2023-11-29 03:32:29,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 03:32:29,898 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 03:32:29,899 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 03:32:29,899 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 03:32:29,904 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 03:32:29,905 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:32:29" (1/1) ... [2023-11-29 03:32:29,906 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2022fdf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:32:29, skipping insertion in model container [2023-11-29 03:32:29,906 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 03:32:29" (1/1) ... [2023-11-29 03:32:29,958 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 03:32:30,462 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:32:30,482 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 03:32:30,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 03:32:30,658 INFO L206 MainTranslator]: Completed translation [2023-11-29 03:32:30,659 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:32:30 WrapperNode [2023-11-29 03:32:30,659 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 03:32:30,660 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 03:32:30,660 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 03:32:30,660 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 03:32:30,666 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:32:30" (1/1) ... [2023-11-29 03:32:30,688 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:32:30" (1/1) ... [2023-11-29 03:32:30,716 INFO L138 Inliner]: procedures = 371, calls = 31, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 122 [2023-11-29 03:32:30,716 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 03:32:30,717 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 03:32:30,717 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 03:32:30,718 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 03:32:30,727 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:32:30" (1/1) ... [2023-11-29 03:32:30,728 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:32:30" (1/1) ... [2023-11-29 03:32:30,734 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:32:30" (1/1) ... [2023-11-29 03:32:30,757 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [6, 14, 1]. 67 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0, 0]. The 14 writes are split as follows [3, 10, 1]. [2023-11-29 03:32:30,757 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:32:30" (1/1) ... [2023-11-29 03:32:30,757 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:32:30" (1/1) ... [2023-11-29 03:32:30,769 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:32:30" (1/1) ... [2023-11-29 03:32:30,772 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:32:30" (1/1) ... [2023-11-29 03:32:30,775 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:32:30" (1/1) ... [2023-11-29 03:32:30,777 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:32:30" (1/1) ... [2023-11-29 03:32:30,782 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 03:32:30,783 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 03:32:30,783 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 03:32:30,783 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 03:32:30,784 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:32:30" (1/1) ... [2023-11-29 03:32:30,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 03:32:30,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:32:30,823 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 03:32:30,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 03:32:30,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 03:32:30,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-29 03:32:30,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-29 03:32:30,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-29 03:32:30,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 03:32:30,857 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 03:32:30,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 03:32:30,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 03:32:30,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 03:32:30,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 03:32:30,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 03:32:30,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 03:32:30,858 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 03:32:30,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-29 03:32:30,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 03:32:30,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-29 03:32:30,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-29 03:32:30,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-29 03:32:30,859 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-29 03:32:30,859 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-29 03:32:30,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 03:32:30,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 03:32:30,861 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 03:32:31,016 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 03:32:31,018 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 03:32:31,347 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 03:32:31,499 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 03:32:31,499 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 03:32:31,500 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:32:31 BoogieIcfgContainer [2023-11-29 03:32:31,500 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 03:32:31,503 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 03:32:31,503 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 03:32:31,506 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 03:32:31,507 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 03:32:29" (1/3) ... [2023-11-29 03:32:31,507 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1074f40a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:32:31, skipping insertion in model container [2023-11-29 03:32:31,508 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 03:32:30" (2/3) ... [2023-11-29 03:32:31,508 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1074f40a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 03:32:31, skipping insertion in model container [2023-11-29 03:32:31,508 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:32:31" (3/3) ... [2023-11-29 03:32:31,509 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_19-nested_nr-deref.i [2023-11-29 03:32:31,530 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 03:32:31,530 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-11-29 03:32:31,530 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 03:32:31,594 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-29 03:32:31,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 74 transitions, 152 flow [2023-11-29 03:32:31,673 INFO L124 PetriNetUnfolderBase]: 1/73 cut-off events. [2023-11-29 03:32:31,674 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 03:32:31,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 73 events. 1/73 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 168 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2023-11-29 03:32:31,677 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 74 transitions, 152 flow [2023-11-29 03:32:31,682 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 73 transitions, 149 flow [2023-11-29 03:32:31,690 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 03:32:31,697 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;@25818a46, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 03:32:31,697 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-29 03:32:31,701 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 03:32:31,701 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-11-29 03:32:31,701 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 03:32:31,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:32:31,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-29 03:32:31,703 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 03:32:31,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:31,709 INFO L85 PathProgramCache]: Analyzing trace with hash 385122, now seen corresponding path program 1 times [2023-11-29 03:32:31,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:31,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332364522] [2023-11-29 03:32:31,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:31,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:32:31,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:31,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332364522] [2023-11-29 03:32:31,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332364522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:32:31,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:32:31,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:32:31,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350433968] [2023-11-29 03:32:31,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:32:31,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:32:31,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:31,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:32:31,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:32:31,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 74 [2023-11-29 03:32:31,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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) [2023-11-29 03:32:31,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:32:31,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 74 [2023-11-29 03:32:31,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:32:32,138 INFO L124 PetriNetUnfolderBase]: 64/270 cut-off events. [2023-11-29 03:32:32,139 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 03:32:32,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 270 events. 64/270 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1235 event pairs, 63 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 377. Up to 153 conditions per place. [2023-11-29 03:32:32,145 INFO L140 encePairwiseOnDemand]: 71/74 looper letters, 25 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-11-29 03:32:32,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 74 transitions, 205 flow [2023-11-29 03:32:32,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:32:32,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:32:32,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 172 transitions. [2023-11-29 03:32:32,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7747747747747747 [2023-11-29 03:32:32,158 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 172 transitions. [2023-11-29 03:32:32,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 172 transitions. [2023-11-29 03:32:32,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:32:32,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 172 transitions. [2023-11-29 03:32:32,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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) [2023-11-29 03:32:32,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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) [2023-11-29 03:32:32,169 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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) [2023-11-29 03:32:32,171 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 149 flow. Second operand 3 states and 172 transitions. [2023-11-29 03:32:32,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 74 transitions, 205 flow [2023-11-29 03:32:32,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:32:32,178 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 160 flow [2023-11-29 03:32:32,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2023-11-29 03:32:32,184 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 2 predicate places. [2023-11-29 03:32:32,184 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 160 flow [2023-11-29 03:32:32,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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) [2023-11-29 03:32:32,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:32:32,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-29 03:32:32,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 03:32:32,185 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 03:32:32,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:32,186 INFO L85 PathProgramCache]: Analyzing trace with hash 11938264, now seen corresponding path program 1 times [2023-11-29 03:32:32,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:32,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266215779] [2023-11-29 03:32:32,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:32,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:32:32,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:32,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266215779] [2023-11-29 03:32:32,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266215779] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:32:32,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013725578] [2023-11-29 03:32:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:32,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:32:32,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:32:32,301 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:32:32,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 03:32:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:32,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 03:32:32,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:32:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:32:32,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:32:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:32:32,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013725578] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:32:32,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:32:32,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-29 03:32:32,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793856541] [2023-11-29 03:32:32,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:32:32,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 03:32:32,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:32,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 03:32:32,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 03:32:32,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 74 [2023-11-29 03:32:32,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 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) [2023-11-29 03:32:32,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:32:32,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 74 [2023-11-29 03:32:32,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:32:32,623 INFO L124 PetriNetUnfolderBase]: 64/273 cut-off events. [2023-11-29 03:32:32,623 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 03:32:32,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 273 events. 64/273 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1230 event pairs, 63 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 432. Up to 153 conditions per place. [2023-11-29 03:32:32,627 INFO L140 encePairwiseOnDemand]: 71/74 looper letters, 25 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2023-11-29 03:32:32,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 77 transitions, 232 flow [2023-11-29 03:32:32,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:32:32,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 03:32:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 321 transitions. [2023-11-29 03:32:32,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.722972972972973 [2023-11-29 03:32:32,632 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 321 transitions. [2023-11-29 03:32:32,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 321 transitions. [2023-11-29 03:32:32,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:32:32,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 321 transitions. [2023-11-29 03:32:32,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 53.5) internal successors, (321), 6 states have internal predecessors, (321), 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) [2023-11-29 03:32:32,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 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) [2023-11-29 03:32:32,639 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 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) [2023-11-29 03:32:32,639 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 160 flow. Second operand 6 states and 321 transitions. [2023-11-29 03:32:32,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 77 transitions, 232 flow [2023-11-29 03:32:32,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 77 transitions, 228 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-29 03:32:32,643 INFO L231 Difference]: Finished difference. Result has 85 places, 77 transitions, 192 flow [2023-11-29 03:32:32,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=85, PETRI_TRANSITIONS=77} [2023-11-29 03:32:32,644 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 9 predicate places. [2023-11-29 03:32:32,644 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 77 transitions, 192 flow [2023-11-29 03:32:32,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 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) [2023-11-29 03:32:32,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:32:32,645 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-29 03:32:32,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 03:32:32,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:32:32,846 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 03:32:32,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:32,847 INFO L85 PathProgramCache]: Analyzing trace with hash -829977118, now seen corresponding path program 2 times [2023-11-29 03:32:32,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:32,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483583043] [2023-11-29 03:32:32,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:32,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:32,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-29 03:32:32,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:32,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483583043] [2023-11-29 03:32:32,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483583043] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:32:32,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:32:32,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:32:32,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046234877] [2023-11-29 03:32:32,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:32:32,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:32:32,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:32,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:32:32,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:32:33,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 74 [2023-11-29 03:32:33,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 77 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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) [2023-11-29 03:32:33,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:32:33,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 74 [2023-11-29 03:32:33,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:32:33,164 INFO L124 PetriNetUnfolderBase]: 64/269 cut-off events. [2023-11-29 03:32:33,165 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-29 03:32:33,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 269 events. 64/269 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1209 event pairs, 63 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 421. Up to 155 conditions per place. [2023-11-29 03:32:33,168 INFO L140 encePairwiseOnDemand]: 66/74 looper letters, 28 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2023-11-29 03:32:33,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 73 transitions, 248 flow [2023-11-29 03:32:33,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:32:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:32:33,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 158 transitions. [2023-11-29 03:32:33,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7117117117117117 [2023-11-29 03:32:33,171 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 158 transitions. [2023-11-29 03:32:33,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 158 transitions. [2023-11-29 03:32:33,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:32:33,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 158 transitions. [2023-11-29 03:32:33,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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) [2023-11-29 03:32:33,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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) [2023-11-29 03:32:33,175 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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) [2023-11-29 03:32:33,175 INFO L175 Difference]: Start difference. First operand has 85 places, 77 transitions, 192 flow. Second operand 3 states and 158 transitions. [2023-11-29 03:32:33,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 73 transitions, 248 flow [2023-11-29 03:32:33,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 73 transitions, 234 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-29 03:32:33,179 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 178 flow [2023-11-29 03:32:33,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2023-11-29 03:32:33,180 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 6 predicate places. [2023-11-29 03:32:33,181 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 178 flow [2023-11-29 03:32:33,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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) [2023-11-29 03:32:33,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:32:33,181 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-11-29 03:32:33,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 03:32:33,182 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 03:32:33,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:33,182 INFO L85 PathProgramCache]: Analyzing trace with hash -829977117, now seen corresponding path program 1 times [2023-11-29 03:32:33,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:33,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483887108] [2023-11-29 03:32:33,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:33,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:32:33,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:33,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483887108] [2023-11-29 03:32:33,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483887108] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 03:32:33,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091973355] [2023-11-29 03:32:33,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:33,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:32:33,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:32:33,308 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:32:33,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 03:32:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:33,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 03:32:33,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:32:33,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:32:33,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 03:32:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 03:32:33,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091973355] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 03:32:33,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 03:32:33,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-29 03:32:33,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759156274] [2023-11-29 03:32:33,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 03:32:33,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 03:32:33,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:33,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 03:32:33,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-29 03:32:33,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 74 [2023-11-29 03:32:33,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 178 flow. Second operand has 13 states, 13 states have (on average 49.07692307692308) internal successors, (638), 13 states have internal predecessors, (638), 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) [2023-11-29 03:32:33,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:32:33,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 74 [2023-11-29 03:32:33,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:32:33,669 INFO L124 PetriNetUnfolderBase]: 64/275 cut-off events. [2023-11-29 03:32:33,669 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-11-29 03:32:33,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 275 events. 64/275 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1221 event pairs, 63 based on Foata normal form. 6/222 useless extension candidates. Maximal degree in co-relation 423. Up to 153 conditions per place. [2023-11-29 03:32:33,672 INFO L140 encePairwiseOnDemand]: 71/74 looper letters, 25 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2023-11-29 03:32:33,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 79 transitions, 286 flow [2023-11-29 03:32:33,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 03:32:33,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 03:32:33,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 618 transitions. [2023-11-29 03:32:33,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6959459459459459 [2023-11-29 03:32:33,676 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 618 transitions. [2023-11-29 03:32:33,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 618 transitions. [2023-11-29 03:32:33,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:32:33,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 618 transitions. [2023-11-29 03:32:33,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 51.5) internal successors, (618), 12 states have internal predecessors, (618), 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) [2023-11-29 03:32:33,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 74.0) internal successors, (962), 13 states have internal predecessors, (962), 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) [2023-11-29 03:32:33,684 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 74.0) internal successors, (962), 13 states have internal predecessors, (962), 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) [2023-11-29 03:32:33,684 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 178 flow. Second operand 12 states and 618 transitions. [2023-11-29 03:32:33,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 79 transitions, 286 flow [2023-11-29 03:32:33,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 79 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:32:33,689 INFO L231 Difference]: Finished difference. Result has 97 places, 79 transitions, 254 flow [2023-11-29 03:32:33,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=254, PETRI_PLACES=97, PETRI_TRANSITIONS=79} [2023-11-29 03:32:33,690 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 21 predicate places. [2023-11-29 03:32:33,690 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 79 transitions, 254 flow [2023-11-29 03:32:33,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 49.07692307692308) internal successors, (638), 13 states have internal predecessors, (638), 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) [2023-11-29 03:32:33,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:32:33,691 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-11-29 03:32:33,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 03:32:33,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-29 03:32:33,896 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 03:32:33,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:33,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2110056995, now seen corresponding path program 2 times [2023-11-29 03:32:33,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:33,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454996674] [2023-11-29 03:32:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:33,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:33,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 03:32:34,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:34,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454996674] [2023-11-29 03:32:34,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454996674] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:32:34,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:32:34,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:32:34,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777538781] [2023-11-29 03:32:34,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:32:34,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:32:34,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:34,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:32:34,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:32:34,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 74 [2023-11-29 03:32:34,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 79 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2023-11-29 03:32:34,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:32:34,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 74 [2023-11-29 03:32:34,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:32:34,211 INFO L124 PetriNetUnfolderBase]: 64/271 cut-off events. [2023-11-29 03:32:34,211 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-11-29 03:32:34,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 271 events. 64/271 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1205 event pairs, 63 based on Foata normal form. 2/216 useless extension candidates. Maximal degree in co-relation 421. Up to 161 conditions per place. [2023-11-29 03:32:34,214 INFO L140 encePairwiseOnDemand]: 66/74 looper letters, 32 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-11-29 03:32:34,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 75 transitions, 318 flow [2023-11-29 03:32:34,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:32:34,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:32:34,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-11-29 03:32:34,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7297297297297297 [2023-11-29 03:32:34,216 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-11-29 03:32:34,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-11-29 03:32:34,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:32:34,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-11-29 03:32:34,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 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) [2023-11-29 03:32:34,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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) [2023-11-29 03:32:34,218 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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) [2023-11-29 03:32:34,218 INFO L175 Difference]: Start difference. First operand has 97 places, 79 transitions, 254 flow. Second operand 3 states and 162 transitions. [2023-11-29 03:32:34,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 75 transitions, 318 flow [2023-11-29 03:32:34,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 75 transitions, 270 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-11-29 03:32:34,224 INFO L231 Difference]: Finished difference. Result has 90 places, 75 transitions, 206 flow [2023-11-29 03:32:34,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=90, PETRI_TRANSITIONS=75} [2023-11-29 03:32:34,225 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 14 predicate places. [2023-11-29 03:32:34,226 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 75 transitions, 206 flow [2023-11-29 03:32:34,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2023-11-29 03:32:34,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:32:34,226 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-11-29 03:32:34,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 03:32:34,226 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 03:32:34,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:34,227 INFO L85 PathProgramCache]: Analyzing trace with hash 540218211, now seen corresponding path program 1 times [2023-11-29 03:32:34,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:34,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304072596] [2023-11-29 03:32:34,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:34,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:34,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 03:32:34,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:34,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304072596] [2023-11-29 03:32:34,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304072596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:32:34,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:32:34,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:32:34,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549854525] [2023-11-29 03:32:34,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:32:34,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 03:32:34,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:34,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 03:32:34,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 03:32:34,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 74 [2023-11-29 03:32:34,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 75 transitions, 206 flow. Second operand has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 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) [2023-11-29 03:32:34,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:32:34,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 74 [2023-11-29 03:32:34,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:32:34,814 INFO L124 PetriNetUnfolderBase]: 77/321 cut-off events. [2023-11-29 03:32:34,815 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-11-29 03:32:34,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563 conditions, 321 events. 77/321 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1491 event pairs, 55 based on Foata normal form. 1/261 useless extension candidates. Maximal degree in co-relation 512. Up to 145 conditions per place. [2023-11-29 03:32:34,818 INFO L140 encePairwiseOnDemand]: 67/74 looper letters, 51 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2023-11-29 03:32:34,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 86 transitions, 336 flow [2023-11-29 03:32:34,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 03:32:34,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-29 03:32:34,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 212 transitions. [2023-11-29 03:32:34,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7162162162162162 [2023-11-29 03:32:34,820 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 212 transitions. [2023-11-29 03:32:34,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 212 transitions. [2023-11-29 03:32:34,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:32:34,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 212 transitions. [2023-11-29 03:32:34,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 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) [2023-11-29 03:32:34,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 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) [2023-11-29 03:32:34,823 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 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) [2023-11-29 03:32:34,823 INFO L175 Difference]: Start difference. First operand has 90 places, 75 transitions, 206 flow. Second operand 4 states and 212 transitions. [2023-11-29 03:32:34,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 86 transitions, 336 flow [2023-11-29 03:32:34,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 86 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:32:34,828 INFO L231 Difference]: Finished difference. Result has 90 places, 73 transitions, 209 flow [2023-11-29 03:32:34,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=209, PETRI_PLACES=90, PETRI_TRANSITIONS=73} [2023-11-29 03:32:34,829 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 14 predicate places. [2023-11-29 03:32:34,829 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 73 transitions, 209 flow [2023-11-29 03:32:34,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 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) [2023-11-29 03:32:34,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:32:34,830 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-11-29 03:32:34,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 03:32:34,830 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 03:32:34,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:34,831 INFO L85 PathProgramCache]: Analyzing trace with hash 540218212, now seen corresponding path program 1 times [2023-11-29 03:32:34,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:34,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218494432] [2023-11-29 03:32:34,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:34,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 03:32:35,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:35,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218494432] [2023-11-29 03:32:35,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218494432] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:32:35,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:32:35,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:32:35,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849199559] [2023-11-29 03:32:35,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:32:35,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 03:32:35,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:35,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 03:32:35,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 03:32:35,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 74 [2023-11-29 03:32:35,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 73 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 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) [2023-11-29 03:32:35,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:32:35,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 74 [2023-11-29 03:32:35,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:32:35,405 INFO L124 PetriNetUnfolderBase]: 75/310 cut-off events. [2023-11-29 03:32:35,405 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2023-11-29 03:32:35,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 580 conditions, 310 events. 75/310 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1460 event pairs, 45 based on Foata normal form. 9/263 useless extension candidates. Maximal degree in co-relation 526. Up to 112 conditions per place. [2023-11-29 03:32:35,408 INFO L140 encePairwiseOnDemand]: 66/74 looper letters, 52 selfloop transitions, 5 changer transitions 0/89 dead transitions. [2023-11-29 03:32:35,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 89 transitions, 360 flow [2023-11-29 03:32:35,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:32:35,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 03:32:35,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 255 transitions. [2023-11-29 03:32:35,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6891891891891891 [2023-11-29 03:32:35,410 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 255 transitions. [2023-11-29 03:32:35,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 255 transitions. [2023-11-29 03:32:35,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:32:35,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 255 transitions. [2023-11-29 03:32:35,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 51.0) internal successors, (255), 5 states have internal predecessors, (255), 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) [2023-11-29 03:32:35,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 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) [2023-11-29 03:32:35,413 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 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) [2023-11-29 03:32:35,413 INFO L175 Difference]: Start difference. First operand has 90 places, 73 transitions, 209 flow. Second operand 5 states and 255 transitions. [2023-11-29 03:32:35,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 89 transitions, 360 flow [2023-11-29 03:32:35,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 89 transitions, 358 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-29 03:32:35,416 INFO L231 Difference]: Finished difference. Result has 91 places, 72 transitions, 222 flow [2023-11-29 03:32:35,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=222, PETRI_PLACES=91, PETRI_TRANSITIONS=72} [2023-11-29 03:32:35,417 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 15 predicate places. [2023-11-29 03:32:35,417 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 72 transitions, 222 flow [2023-11-29 03:32:35,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 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) [2023-11-29 03:32:35,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:32:35,417 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:35,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 03:32:35,418 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 03:32:35,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:35,418 INFO L85 PathProgramCache]: Analyzing trace with hash -525008228, now seen corresponding path program 1 times [2023-11-29 03:32:35,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:35,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067403298] [2023-11-29 03:32:35,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:35,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 03:32:35,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:35,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067403298] [2023-11-29 03:32:35,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067403298] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:32:35,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:32:35,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 03:32:35,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82244410] [2023-11-29 03:32:35,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:32:35,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 03:32:35,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:35,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 03:32:35,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 03:32:36,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 74 [2023-11-29 03:32:36,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 72 transitions, 222 flow. Second operand has 7 states, 7 states have (on average 40.42857142857143) internal successors, (283), 7 states have internal predecessors, (283), 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) [2023-11-29 03:32:36,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:32:36,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 74 [2023-11-29 03:32:36,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:32:36,217 INFO L124 PetriNetUnfolderBase]: 73/312 cut-off events. [2023-11-29 03:32:36,218 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-29 03:32:36,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 638 conditions, 312 events. 73/312 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1478 event pairs, 50 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 582. Up to 107 conditions per place. [2023-11-29 03:32:36,220 INFO L140 encePairwiseOnDemand]: 65/74 looper letters, 43 selfloop transitions, 7 changer transitions 0/78 dead transitions. [2023-11-29 03:32:36,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 78 transitions, 336 flow [2023-11-29 03:32:36,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 03:32:36,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 03:32:36,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 313 transitions. [2023-11-29 03:32:36,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6042471042471043 [2023-11-29 03:32:36,222 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 313 transitions. [2023-11-29 03:32:36,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 313 transitions. [2023-11-29 03:32:36,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:32:36,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 313 transitions. [2023-11-29 03:32:36,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 44.714285714285715) internal successors, (313), 7 states have internal predecessors, (313), 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) [2023-11-29 03:32:36,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 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) [2023-11-29 03:32:36,226 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 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) [2023-11-29 03:32:36,226 INFO L175 Difference]: Start difference. First operand has 91 places, 72 transitions, 222 flow. Second operand 7 states and 313 transitions. [2023-11-29 03:32:36,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 78 transitions, 336 flow [2023-11-29 03:32:36,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 78 transitions, 329 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-29 03:32:36,229 INFO L231 Difference]: Finished difference. Result has 92 places, 70 transitions, 225 flow [2023-11-29 03:32:36,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=225, PETRI_PLACES=92, PETRI_TRANSITIONS=70} [2023-11-29 03:32:36,230 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 16 predicate places. [2023-11-29 03:32:36,230 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 70 transitions, 225 flow [2023-11-29 03:32:36,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 40.42857142857143) internal successors, (283), 7 states have internal predecessors, (283), 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) [2023-11-29 03:32:36,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:32:36,231 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:36,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 03:32:36,231 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 03:32:36,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:36,231 INFO L85 PathProgramCache]: Analyzing trace with hash -525008227, now seen corresponding path program 1 times [2023-11-29 03:32:36,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:36,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000435883] [2023-11-29 03:32:36,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:36,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 03:32:36,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:36,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000435883] [2023-11-29 03:32:36,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000435883] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:32:36,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:32:36,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 03:32:36,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436559885] [2023-11-29 03:32:36,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:32:36,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 03:32:36,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:36,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 03:32:36,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 03:32:37,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 74 [2023-11-29 03:32:37,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 70 transitions, 225 flow. Second operand has 7 states, 7 states have (on average 37.42857142857143) internal successors, (262), 7 states have internal predecessors, (262), 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) [2023-11-29 03:32:37,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:32:37,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 74 [2023-11-29 03:32:37,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:32:37,232 INFO L124 PetriNetUnfolderBase]: 73/301 cut-off events. [2023-11-29 03:32:37,232 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2023-11-29 03:32:37,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 301 events. 73/301 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1418 event pairs, 52 based on Foata normal form. 1/249 useless extension candidates. Maximal degree in co-relation 569. Up to 136 conditions per place. [2023-11-29 03:32:37,235 INFO L140 encePairwiseOnDemand]: 65/74 looper letters, 39 selfloop transitions, 8 changer transitions 3/77 dead transitions. [2023-11-29 03:32:37,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 77 transitions, 344 flow [2023-11-29 03:32:37,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 03:32:37,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 03:32:37,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 291 transitions. [2023-11-29 03:32:37,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5617760617760618 [2023-11-29 03:32:37,237 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 291 transitions. [2023-11-29 03:32:37,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 291 transitions. [2023-11-29 03:32:37,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:32:37,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 291 transitions. [2023-11-29 03:32:37,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 41.57142857142857) internal successors, (291), 7 states have internal predecessors, (291), 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) [2023-11-29 03:32:37,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 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) [2023-11-29 03:32:37,241 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 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) [2023-11-29 03:32:37,241 INFO L175 Difference]: Start difference. First operand has 92 places, 70 transitions, 225 flow. Second operand 7 states and 291 transitions. [2023-11-29 03:32:37,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 77 transitions, 344 flow [2023-11-29 03:32:37,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 77 transitions, 330 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 03:32:37,244 INFO L231 Difference]: Finished difference. Result has 90 places, 68 transitions, 223 flow [2023-11-29 03:32:37,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=223, PETRI_PLACES=90, PETRI_TRANSITIONS=68} [2023-11-29 03:32:37,245 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 14 predicate places. [2023-11-29 03:32:37,245 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 68 transitions, 223 flow [2023-11-29 03:32:37,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 37.42857142857143) internal successors, (262), 7 states have internal predecessors, (262), 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) [2023-11-29 03:32:37,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:32:37,246 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:37,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 03:32:37,246 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 03:32:37,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:37,247 INFO L85 PathProgramCache]: Analyzing trace with hash -2021718729, now seen corresponding path program 1 times [2023-11-29 03:32:37,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:37,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356634003] [2023-11-29 03:32:37,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:37,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 03:32:37,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:37,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356634003] [2023-11-29 03:32:37,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356634003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:32:37,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:32:37,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:32:37,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019724852] [2023-11-29 03:32:37,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:32:37,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:32:37,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:37,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:32:37,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:32:37,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 74 [2023-11-29 03:32:37,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 68 transitions, 223 flow. Second operand has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 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) [2023-11-29 03:32:37,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:32:37,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 74 [2023-11-29 03:32:37,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:32:37,715 INFO L124 PetriNetUnfolderBase]: 73/307 cut-off events. [2023-11-29 03:32:37,715 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2023-11-29 03:32:37,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 640 conditions, 307 events. 73/307 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1471 event pairs, 65 based on Foata normal form. 1/252 useless extension candidates. Maximal degree in co-relation 585. Up to 184 conditions per place. [2023-11-29 03:32:37,717 INFO L140 encePairwiseOnDemand]: 67/74 looper letters, 33 selfloop transitions, 6 changer transitions 0/67 dead transitions. [2023-11-29 03:32:37,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 67 transitions, 299 flow [2023-11-29 03:32:37,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:32:37,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 03:32:37,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 242 transitions. [2023-11-29 03:32:37,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.654054054054054 [2023-11-29 03:32:37,719 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 242 transitions. [2023-11-29 03:32:37,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 242 transitions. [2023-11-29 03:32:37,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:32:37,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 242 transitions. [2023-11-29 03:32:37,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 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) [2023-11-29 03:32:37,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 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) [2023-11-29 03:32:37,721 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 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) [2023-11-29 03:32:37,721 INFO L175 Difference]: Start difference. First operand has 90 places, 68 transitions, 223 flow. Second operand 5 states and 242 transitions. [2023-11-29 03:32:37,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 67 transitions, 299 flow [2023-11-29 03:32:37,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 67 transitions, 283 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 03:32:37,724 INFO L231 Difference]: Finished difference. Result has 87 places, 67 transitions, 217 flow [2023-11-29 03:32:37,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=217, PETRI_PLACES=87, PETRI_TRANSITIONS=67} [2023-11-29 03:32:37,725 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 11 predicate places. [2023-11-29 03:32:37,726 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 67 transitions, 217 flow [2023-11-29 03:32:37,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 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) [2023-11-29 03:32:37,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:32:37,726 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:37,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 03:32:37,726 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 03:32:37,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:37,727 INFO L85 PathProgramCache]: Analyzing trace with hash -2021718730, now seen corresponding path program 1 times [2023-11-29 03:32:37,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:37,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475258075] [2023-11-29 03:32:37,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:37,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 03:32:37,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:37,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475258075] [2023-11-29 03:32:37,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475258075] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:32:37,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:32:37,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 03:32:37,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937829279] [2023-11-29 03:32:37,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:32:37,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 03:32:37,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:37,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 03:32:37,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 03:32:37,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 74 [2023-11-29 03:32:37,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 67 transitions, 217 flow. Second operand has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 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) [2023-11-29 03:32:37,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:32:37,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 74 [2023-11-29 03:32:37,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:32:38,106 INFO L124 PetriNetUnfolderBase]: 73/306 cut-off events. [2023-11-29 03:32:38,107 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2023-11-29 03:32:38,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 306 events. 73/306 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1456 event pairs, 65 based on Foata normal form. 1/251 useless extension candidates. Maximal degree in co-relation 564. Up to 184 conditions per place. [2023-11-29 03:32:38,109 INFO L140 encePairwiseOnDemand]: 67/74 looper letters, 35 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2023-11-29 03:32:38,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 66 transitions, 297 flow [2023-11-29 03:32:38,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 03:32:38,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-29 03:32:38,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 234 transitions. [2023-11-29 03:32:38,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6324324324324324 [2023-11-29 03:32:38,111 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 234 transitions. [2023-11-29 03:32:38,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 234 transitions. [2023-11-29 03:32:38,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:32:38,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 234 transitions. [2023-11-29 03:32:38,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 46.8) internal successors, (234), 5 states have internal predecessors, (234), 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) [2023-11-29 03:32:38,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 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) [2023-11-29 03:32:38,113 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 74.0) internal successors, (444), 6 states have internal predecessors, (444), 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) [2023-11-29 03:32:38,113 INFO L175 Difference]: Start difference. First operand has 87 places, 67 transitions, 217 flow. Second operand 5 states and 234 transitions. [2023-11-29 03:32:38,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 66 transitions, 297 flow [2023-11-29 03:32:38,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 66 transitions, 285 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 03:32:38,116 INFO L231 Difference]: Finished difference. Result has 86 places, 66 transitions, 215 flow [2023-11-29 03:32:38,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=215, PETRI_PLACES=86, PETRI_TRANSITIONS=66} [2023-11-29 03:32:38,117 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 10 predicate places. [2023-11-29 03:32:38,117 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 66 transitions, 215 flow [2023-11-29 03:32:38,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.2) internal successors, (216), 5 states have internal predecessors, (216), 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) [2023-11-29 03:32:38,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:32:38,117 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:38,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 03:32:38,117 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 03:32:38,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:38,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1751229261, now seen corresponding path program 1 times [2023-11-29 03:32:38,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:38,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274559069] [2023-11-29 03:32:38,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:38,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 03:32:38,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:38,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274559069] [2023-11-29 03:32:38,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274559069] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:32:38,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:32:38,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 03:32:38,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755238206] [2023-11-29 03:32:38,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:32:38,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 03:32:38,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:38,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 03:32:38,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 03:32:38,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 74 [2023-11-29 03:32:38,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 66 transitions, 215 flow. Second operand has 6 states, 6 states have (on average 48.666666666666664) internal successors, (292), 6 states have internal predecessors, (292), 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) [2023-11-29 03:32:38,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:32:38,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 74 [2023-11-29 03:32:38,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:32:38,728 INFO L124 PetriNetUnfolderBase]: 73/307 cut-off events. [2023-11-29 03:32:38,728 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2023-11-29 03:32:38,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 307 events. 73/307 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1470 event pairs, 50 based on Foata normal form. 1/253 useless extension candidates. Maximal degree in co-relation 563. Up to 109 conditions per place. [2023-11-29 03:32:38,731 INFO L140 encePairwiseOnDemand]: 68/74 looper letters, 42 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2023-11-29 03:32:38,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 73 transitions, 325 flow [2023-11-29 03:32:38,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:32:38,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 03:32:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 318 transitions. [2023-11-29 03:32:38,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7162162162162162 [2023-11-29 03:32:38,733 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 318 transitions. [2023-11-29 03:32:38,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 318 transitions. [2023-11-29 03:32:38,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:32:38,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 318 transitions. [2023-11-29 03:32:38,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 53.0) internal successors, (318), 6 states have internal predecessors, (318), 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) [2023-11-29 03:32:38,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 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) [2023-11-29 03:32:38,737 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 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) [2023-11-29 03:32:38,737 INFO L175 Difference]: Start difference. First operand has 86 places, 66 transitions, 215 flow. Second operand 6 states and 318 transitions. [2023-11-29 03:32:38,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 73 transitions, 325 flow [2023-11-29 03:32:38,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 73 transitions, 313 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-29 03:32:38,741 INFO L231 Difference]: Finished difference. Result has 86 places, 65 transitions, 211 flow [2023-11-29 03:32:38,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=211, PETRI_PLACES=86, PETRI_TRANSITIONS=65} [2023-11-29 03:32:38,742 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 10 predicate places. [2023-11-29 03:32:38,742 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 65 transitions, 211 flow [2023-11-29 03:32:38,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 48.666666666666664) internal successors, (292), 6 states have internal predecessors, (292), 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) [2023-11-29 03:32:38,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:32:38,742 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:38,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 03:32:38,743 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 03:32:38,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:38,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1751229260, now seen corresponding path program 1 times [2023-11-29 03:32:38,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:38,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114059130] [2023-11-29 03:32:38,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:38,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 03:32:39,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:39,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114059130] [2023-11-29 03:32:39,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114059130] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:32:39,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:32:39,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 03:32:39,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252900779] [2023-11-29 03:32:39,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:32:39,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 03:32:39,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:39,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 03:32:39,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-29 03:32:39,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 74 [2023-11-29 03:32:39,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 65 transitions, 211 flow. Second operand has 9 states, 9 states have (on average 44.44444444444444) internal successors, (400), 9 states have internal predecessors, (400), 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) [2023-11-29 03:32:39,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:32:39,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 74 [2023-11-29 03:32:39,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:32:39,608 INFO L124 PetriNetUnfolderBase]: 73/306 cut-off events. [2023-11-29 03:32:39,608 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-29 03:32:39,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629 conditions, 306 events. 73/306 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1465 event pairs, 50 based on Foata normal form. 0/252 useless extension candidates. Maximal degree in co-relation 574. Up to 116 conditions per place. [2023-11-29 03:32:39,610 INFO L140 encePairwiseOnDemand]: 71/74 looper letters, 49 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-11-29 03:32:39,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 72 transitions, 329 flow [2023-11-29 03:32:39,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:32:39,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:32:39,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2023-11-29 03:32:39,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7612612612612613 [2023-11-29 03:32:39,612 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 169 transitions. [2023-11-29 03:32:39,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 169 transitions. [2023-11-29 03:32:39,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:32:39,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 169 transitions. [2023-11-29 03:32:39,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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) [2023-11-29 03:32:39,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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) [2023-11-29 03:32:39,614 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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) [2023-11-29 03:32:39,614 INFO L175 Difference]: Start difference. First operand has 86 places, 65 transitions, 211 flow. Second operand 3 states and 169 transitions. [2023-11-29 03:32:39,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 72 transitions, 329 flow [2023-11-29 03:32:39,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 72 transitions, 319 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 03:32:39,618 INFO L231 Difference]: Finished difference. Result has 82 places, 64 transitions, 203 flow [2023-11-29 03:32:39,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=82, PETRI_TRANSITIONS=64} [2023-11-29 03:32:39,618 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 6 predicate places. [2023-11-29 03:32:39,619 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 64 transitions, 203 flow [2023-11-29 03:32:39,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 44.44444444444444) internal successors, (400), 9 states have internal predecessors, (400), 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) [2023-11-29 03:32:39,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:32:39,619 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:39,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 03:32:39,619 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 03:32:39,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:39,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1791764171, now seen corresponding path program 1 times [2023-11-29 03:32:39,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:39,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265035730] [2023-11-29 03:32:39,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:39,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 03:32:39,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:39,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265035730] [2023-11-29 03:32:39,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265035730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:32:39,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:32:39,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:32:39,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887848924] [2023-11-29 03:32:39,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:32:39,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:32:39,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:39,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:32:39,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:32:39,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 74 [2023-11-29 03:32:39,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 64 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2023-11-29 03:32:39,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:32:39,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 74 [2023-11-29 03:32:39,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:32:39,939 INFO L124 PetriNetUnfolderBase]: 73/303 cut-off events. [2023-11-29 03:32:39,940 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-29 03:32:39,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 303 events. 73/303 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1442 event pairs, 58 based on Foata normal form. 9/266 useless extension candidates. Maximal degree in co-relation 564. Up to 173 conditions per place. [2023-11-29 03:32:39,942 INFO L140 encePairwiseOnDemand]: 70/74 looper letters, 44 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2023-11-29 03:32:39,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 70 transitions, 320 flow [2023-11-29 03:32:39,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:32:39,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:32:39,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 173 transitions. [2023-11-29 03:32:39,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7792792792792793 [2023-11-29 03:32:39,944 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 173 transitions. [2023-11-29 03:32:39,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 173 transitions. [2023-11-29 03:32:39,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:32:39,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 173 transitions. [2023-11-29 03:32:39,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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) [2023-11-29 03:32:39,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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) [2023-11-29 03:32:39,946 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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) [2023-11-29 03:32:39,947 INFO L175 Difference]: Start difference. First operand has 82 places, 64 transitions, 203 flow. Second operand 3 states and 173 transitions. [2023-11-29 03:32:39,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 70 transitions, 320 flow [2023-11-29 03:32:39,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 70 transitions, 314 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:32:39,951 INFO L231 Difference]: Finished difference. Result has 80 places, 62 transitions, 201 flow [2023-11-29 03:32:39,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=80, PETRI_TRANSITIONS=62} [2023-11-29 03:32:39,951 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 4 predicate places. [2023-11-29 03:32:39,952 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 62 transitions, 201 flow [2023-11-29 03:32:39,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 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) [2023-11-29 03:32:39,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:32:39,952 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:39,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 03:32:39,952 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 03:32:39,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:39,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1791764170, now seen corresponding path program 1 times [2023-11-29 03:32:39,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:39,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805868261] [2023-11-29 03:32:39,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:39,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 03:32:40,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:40,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805868261] [2023-11-29 03:32:40,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805868261] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:32:40,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:32:40,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 03:32:40,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377156636] [2023-11-29 03:32:40,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:32:40,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 03:32:40,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:40,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 03:32:40,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 03:32:40,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 74 [2023-11-29 03:32:40,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 62 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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) [2023-11-29 03:32:40,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:32:40,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 74 [2023-11-29 03:32:40,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:32:40,223 INFO L124 PetriNetUnfolderBase]: 84/307 cut-off events. [2023-11-29 03:32:40,223 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2023-11-29 03:32:40,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 666 conditions, 307 events. 84/307 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1389 event pairs, 60 based on Foata normal form. 9/275 useless extension candidates. Maximal degree in co-relation 611. Up to 185 conditions per place. [2023-11-29 03:32:40,226 INFO L140 encePairwiseOnDemand]: 68/74 looper letters, 47 selfloop transitions, 5 changer transitions 0/72 dead transitions. [2023-11-29 03:32:40,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 72 transitions, 336 flow [2023-11-29 03:32:40,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 03:32:40,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 03:32:40,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 175 transitions. [2023-11-29 03:32:40,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7882882882882883 [2023-11-29 03:32:40,227 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 175 transitions. [2023-11-29 03:32:40,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 175 transitions. [2023-11-29 03:32:40,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:32:40,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 175 transitions. [2023-11-29 03:32:40,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 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) [2023-11-29 03:32:40,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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) [2023-11-29 03:32:40,230 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 74.0) internal successors, (296), 4 states have internal predecessors, (296), 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) [2023-11-29 03:32:40,230 INFO L175 Difference]: Start difference. First operand has 80 places, 62 transitions, 201 flow. Second operand 3 states and 175 transitions. [2023-11-29 03:32:40,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 72 transitions, 336 flow [2023-11-29 03:32:40,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 72 transitions, 328 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:32:40,234 INFO L231 Difference]: Finished difference. Result has 82 places, 65 transitions, 236 flow [2023-11-29 03:32:40,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=82, PETRI_TRANSITIONS=65} [2023-11-29 03:32:40,234 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 6 predicate places. [2023-11-29 03:32:40,235 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 65 transitions, 236 flow [2023-11-29 03:32:40,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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) [2023-11-29 03:32:40,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:32:40,235 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:40,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 03:32:40,236 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 03:32:40,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:40,236 INFO L85 PathProgramCache]: Analyzing trace with hash -299554695, now seen corresponding path program 1 times [2023-11-29 03:32:40,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:40,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607225707] [2023-11-29 03:32:40,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:40,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 03:32:40,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:40,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607225707] [2023-11-29 03:32:40,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607225707] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:32:40,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:32:40,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 03:32:40,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486170878] [2023-11-29 03:32:40,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:32:40,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 03:32:40,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:40,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 03:32:40,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 03:32:40,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 74 [2023-11-29 03:32:40,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 65 transitions, 236 flow. Second operand has 6 states, 6 states have (on average 45.5) internal successors, (273), 6 states have internal predecessors, (273), 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) [2023-11-29 03:32:40,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:32:40,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 74 [2023-11-29 03:32:40,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:32:40,833 INFO L124 PetriNetUnfolderBase]: 84/316 cut-off events. [2023-11-29 03:32:40,833 INFO L125 PetriNetUnfolderBase]: For 161/164 co-relation queries the response was YES. [2023-11-29 03:32:40,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 718 conditions, 316 events. 84/316 cut-off events. For 161/164 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1457 event pairs, 50 based on Foata normal form. 0/278 useless extension candidates. Maximal degree in co-relation 662. Up to 106 conditions per place. [2023-11-29 03:32:40,836 INFO L140 encePairwiseOnDemand]: 67/74 looper letters, 53 selfloop transitions, 7 changer transitions 0/81 dead transitions. [2023-11-29 03:32:40,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 81 transitions, 410 flow [2023-11-29 03:32:40,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 03:32:40,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-29 03:32:40,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 305 transitions. [2023-11-29 03:32:40,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6869369369369369 [2023-11-29 03:32:40,838 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 305 transitions. [2023-11-29 03:32:40,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 305 transitions. [2023-11-29 03:32:40,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:32:40,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 305 transitions. [2023-11-29 03:32:40,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 50.833333333333336) internal successors, (305), 6 states have internal predecessors, (305), 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) [2023-11-29 03:32:40,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 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) [2023-11-29 03:32:40,841 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 74.0) internal successors, (518), 7 states have internal predecessors, (518), 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) [2023-11-29 03:32:40,841 INFO L175 Difference]: Start difference. First operand has 82 places, 65 transitions, 236 flow. Second operand 6 states and 305 transitions. [2023-11-29 03:32:40,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 81 transitions, 410 flow [2023-11-29 03:32:40,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 81 transitions, 392 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-29 03:32:40,845 INFO L231 Difference]: Finished difference. Result has 84 places, 64 transitions, 238 flow [2023-11-29 03:32:40,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=238, PETRI_PLACES=84, PETRI_TRANSITIONS=64} [2023-11-29 03:32:40,846 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 8 predicate places. [2023-11-29 03:32:40,846 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 64 transitions, 238 flow [2023-11-29 03:32:40,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 45.5) internal successors, (273), 6 states have internal predecessors, (273), 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) [2023-11-29 03:32:40,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:32:40,846 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:40,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 03:32:40,847 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 03:32:40,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:40,847 INFO L85 PathProgramCache]: Analyzing trace with hash -299554694, now seen corresponding path program 1 times [2023-11-29 03:32:40,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:40,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871742734] [2023-11-29 03:32:40,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:40,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 03:32:41,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:41,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871742734] [2023-11-29 03:32:41,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871742734] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:32:41,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:32:41,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 03:32:41,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971910917] [2023-11-29 03:32:41,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:32:41,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 03:32:41,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:41,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 03:32:41,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-29 03:32:41,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 74 [2023-11-29 03:32:41,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 64 transitions, 238 flow. Second operand has 9 states, 9 states have (on average 44.666666666666664) internal successors, (402), 9 states have internal predecessors, (402), 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) [2023-11-29 03:32:41,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:32:41,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 74 [2023-11-29 03:32:41,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:32:41,933 INFO L124 PetriNetUnfolderBase]: 96/332 cut-off events. [2023-11-29 03:32:41,933 INFO L125 PetriNetUnfolderBase]: For 178/182 co-relation queries the response was YES. [2023-11-29 03:32:41,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 332 events. 96/332 cut-off events. For 178/182 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1566 event pairs, 57 based on Foata normal form. 10/303 useless extension candidates. Maximal degree in co-relation 727. Up to 164 conditions per place. [2023-11-29 03:32:41,936 INFO L140 encePairwiseOnDemand]: 61/74 looper letters, 48 selfloop transitions, 13 changer transitions 3/84 dead transitions. [2023-11-29 03:32:41,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 84 transitions, 427 flow [2023-11-29 03:32:41,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 03:32:41,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-29 03:32:41,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 479 transitions. [2023-11-29 03:32:41,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472972972972973 [2023-11-29 03:32:41,939 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 479 transitions. [2023-11-29 03:32:41,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 479 transitions. [2023-11-29 03:32:41,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:32:41,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 479 transitions. [2023-11-29 03:32:41,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 47.9) internal successors, (479), 10 states have internal predecessors, (479), 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) [2023-11-29 03:32:41,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 74.0) internal successors, (814), 11 states have internal predecessors, (814), 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) [2023-11-29 03:32:41,944 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 74.0) internal successors, (814), 11 states have internal predecessors, (814), 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) [2023-11-29 03:32:41,944 INFO L175 Difference]: Start difference. First operand has 84 places, 64 transitions, 238 flow. Second operand 10 states and 479 transitions. [2023-11-29 03:32:41,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 84 transitions, 427 flow [2023-11-29 03:32:41,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 411 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-29 03:32:41,948 INFO L231 Difference]: Finished difference. Result has 89 places, 66 transitions, 267 flow [2023-11-29 03:32:41,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=267, PETRI_PLACES=89, PETRI_TRANSITIONS=66} [2023-11-29 03:32:41,950 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 13 predicate places. [2023-11-29 03:32:41,950 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 66 transitions, 267 flow [2023-11-29 03:32:41,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 44.666666666666664) internal successors, (402), 9 states have internal predecessors, (402), 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) [2023-11-29 03:32:41,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:32:41,951 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:41,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 03:32:41,951 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 03:32:41,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:41,951 INFO L85 PathProgramCache]: Analyzing trace with hash -396505909, now seen corresponding path program 1 times [2023-11-29 03:32:41,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:41,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526394844] [2023-11-29 03:32:41,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:41,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 03:32:42,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:42,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526394844] [2023-11-29 03:32:42,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526394844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:32:42,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:32:42,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 03:32:42,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101080928] [2023-11-29 03:32:42,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:32:42,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 03:32:42,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:42,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 03:32:42,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-29 03:32:43,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 74 [2023-11-29 03:32:43,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 66 transitions, 267 flow. Second operand has 9 states, 9 states have (on average 38.77777777777778) internal successors, (349), 9 states have internal predecessors, (349), 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) [2023-11-29 03:32:43,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:32:43,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 74 [2023-11-29 03:32:43,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:32:43,310 INFO L124 PetriNetUnfolderBase]: 90/333 cut-off events. [2023-11-29 03:32:43,310 INFO L125 PetriNetUnfolderBase]: For 215/222 co-relation queries the response was YES. [2023-11-29 03:32:43,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 806 conditions, 333 events. 90/333 cut-off events. For 215/222 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1611 event pairs, 11 based on Foata normal form. 14/300 useless extension candidates. Maximal degree in co-relation 748. Up to 130 conditions per place. [2023-11-29 03:32:43,312 INFO L140 encePairwiseOnDemand]: 65/74 looper letters, 50 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2023-11-29 03:32:43,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 80 transitions, 438 flow [2023-11-29 03:32:43,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 03:32:43,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-29 03:32:43,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 306 transitions. [2023-11-29 03:32:43,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5907335907335908 [2023-11-29 03:32:43,315 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 306 transitions. [2023-11-29 03:32:43,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 306 transitions. [2023-11-29 03:32:43,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:32:43,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 306 transitions. [2023-11-29 03:32:43,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 43.714285714285715) internal successors, (306), 7 states have internal predecessors, (306), 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) [2023-11-29 03:32:43,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 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) [2023-11-29 03:32:43,318 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 74.0) internal successors, (592), 8 states have internal predecessors, (592), 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) [2023-11-29 03:32:43,319 INFO L175 Difference]: Start difference. First operand has 89 places, 66 transitions, 267 flow. Second operand 7 states and 306 transitions. [2023-11-29 03:32:43,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 80 transitions, 438 flow [2023-11-29 03:32:43,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 80 transitions, 405 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-11-29 03:32:43,322 INFO L231 Difference]: Finished difference. Result has 84 places, 66 transitions, 263 flow [2023-11-29 03:32:43,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=263, PETRI_PLACES=84, PETRI_TRANSITIONS=66} [2023-11-29 03:32:43,323 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 8 predicate places. [2023-11-29 03:32:43,323 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 66 transitions, 263 flow [2023-11-29 03:32:43,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 38.77777777777778) internal successors, (349), 9 states have internal predecessors, (349), 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) [2023-11-29 03:32:43,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:32:43,324 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:43,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 03:32:43,324 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 03:32:43,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:43,324 INFO L85 PathProgramCache]: Analyzing trace with hash -696260484, now seen corresponding path program 1 times [2023-11-29 03:32:43,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:43,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461290091] [2023-11-29 03:32:43,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:43,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 03:32:44,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:44,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461290091] [2023-11-29 03:32:44,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461290091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:32:44,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:32:44,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 03:32:44,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978328513] [2023-11-29 03:32:44,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:32:44,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 03:32:44,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:44,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 03:32:44,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-29 03:32:45,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 74 [2023-11-29 03:32:45,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 66 transitions, 263 flow. Second operand has 12 states, 12 states have (on average 33.5) internal successors, (402), 12 states have internal predecessors, (402), 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) [2023-11-29 03:32:45,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:32:45,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 74 [2023-11-29 03:32:45,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:32:45,710 INFO L124 PetriNetUnfolderBase]: 150/463 cut-off events. [2023-11-29 03:32:45,710 INFO L125 PetriNetUnfolderBase]: For 305/314 co-relation queries the response was YES. [2023-11-29 03:32:45,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1113 conditions, 463 events. 150/463 cut-off events. For 305/314 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2360 event pairs, 62 based on Foata normal form. 0/418 useless extension candidates. Maximal degree in co-relation 1056. Up to 225 conditions per place. [2023-11-29 03:32:45,713 INFO L140 encePairwiseOnDemand]: 62/74 looper letters, 72 selfloop transitions, 18 changer transitions 0/103 dead transitions. [2023-11-29 03:32:45,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 103 transitions, 596 flow [2023-11-29 03:32:45,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 03:32:45,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 03:32:45,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 450 transitions. [2023-11-29 03:32:45,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067567567567568 [2023-11-29 03:32:45,716 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 450 transitions. [2023-11-29 03:32:45,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 450 transitions. [2023-11-29 03:32:45,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:32:45,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 450 transitions. [2023-11-29 03:32:45,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 37.5) internal successors, (450), 12 states have internal predecessors, (450), 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) [2023-11-29 03:32:45,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 74.0) internal successors, (962), 13 states have internal predecessors, (962), 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) [2023-11-29 03:32:45,721 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 74.0) internal successors, (962), 13 states have internal predecessors, (962), 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) [2023-11-29 03:32:45,721 INFO L175 Difference]: Start difference. First operand has 84 places, 66 transitions, 263 flow. Second operand 12 states and 450 transitions. [2023-11-29 03:32:45,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 103 transitions, 596 flow [2023-11-29 03:32:45,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 103 transitions, 589 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-29 03:32:45,725 INFO L231 Difference]: Finished difference. Result has 97 places, 76 transitions, 365 flow [2023-11-29 03:32:45,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=365, PETRI_PLACES=97, PETRI_TRANSITIONS=76} [2023-11-29 03:32:45,725 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 21 predicate places. [2023-11-29 03:32:45,725 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 76 transitions, 365 flow [2023-11-29 03:32:45,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 33.5) internal successors, (402), 12 states have internal predecessors, (402), 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) [2023-11-29 03:32:45,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:32:45,726 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:45,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-29 03:32:45,726 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 03:32:45,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:45,726 INFO L85 PathProgramCache]: Analyzing trace with hash -696260485, now seen corresponding path program 1 times [2023-11-29 03:32:45,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:45,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998781920] [2023-11-29 03:32:45,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:45,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:32:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-11-29 03:32:46,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:32:46,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998781920] [2023-11-29 03:32:46,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998781920] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:32:46,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:32:46,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-29 03:32:46,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064064530] [2023-11-29 03:32:46,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:32:46,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 03:32:46,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:32:46,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 03:32:46,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-11-29 03:32:47,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 74 [2023-11-29 03:32:47,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 76 transitions, 365 flow. Second operand has 13 states, 13 states have (on average 37.38461538461539) internal successors, (486), 13 states have internal predecessors, (486), 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) [2023-11-29 03:32:47,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 03:32:47,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 74 [2023-11-29 03:32:47,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 03:32:47,968 INFO L124 PetriNetUnfolderBase]: 150/457 cut-off events. [2023-11-29 03:32:47,968 INFO L125 PetriNetUnfolderBase]: For 457/466 co-relation queries the response was YES. [2023-11-29 03:32:47,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1259 conditions, 457 events. 150/457 cut-off events. For 457/466 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2325 event pairs, 43 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 1198. Up to 232 conditions per place. [2023-11-29 03:32:47,971 INFO L140 encePairwiseOnDemand]: 61/74 looper letters, 66 selfloop transitions, 19 changer transitions 0/98 dead transitions. [2023-11-29 03:32:47,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 98 transitions, 621 flow [2023-11-29 03:32:47,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 03:32:47,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-29 03:32:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 494 transitions. [2023-11-29 03:32:47,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5563063063063063 [2023-11-29 03:32:47,973 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 494 transitions. [2023-11-29 03:32:47,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 494 transitions. [2023-11-29 03:32:47,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 03:32:47,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 494 transitions. [2023-11-29 03:32:47,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 41.166666666666664) internal successors, (494), 12 states have internal predecessors, (494), 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) [2023-11-29 03:32:47,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 74.0) internal successors, (962), 13 states have internal predecessors, (962), 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) [2023-11-29 03:32:47,978 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 74.0) internal successors, (962), 13 states have internal predecessors, (962), 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) [2023-11-29 03:32:47,978 INFO L175 Difference]: Start difference. First operand has 97 places, 76 transitions, 365 flow. Second operand 12 states and 494 transitions. [2023-11-29 03:32:47,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 98 transitions, 621 flow [2023-11-29 03:32:47,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 98 transitions, 609 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-29 03:32:47,984 INFO L231 Difference]: Finished difference. Result has 105 places, 80 transitions, 448 flow [2023-11-29 03:32:47,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=448, PETRI_PLACES=105, PETRI_TRANSITIONS=80} [2023-11-29 03:32:47,985 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 29 predicate places. [2023-11-29 03:32:47,985 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 80 transitions, 448 flow [2023-11-29 03:32:47,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 37.38461538461539) internal successors, (486), 13 states have internal predecessors, (486), 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) [2023-11-29 03:32:47,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-29 03:32:47,985 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:47,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-29 03:32:47,986 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-29 03:32:47,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:32:47,986 INFO L85 PathProgramCache]: Analyzing trace with hash 593219163, now seen corresponding path program 1 times [2023-11-29 03:32:47,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:32:47,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736005039] [2023-11-29 03:32:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:32:47,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:32:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 03:32:48,049 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 03:32:48,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 03:32:48,113 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 03:32:48,113 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-29 03:32:48,114 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 52 remaining) [2023-11-29 03:32:48,116 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 52 remaining) [2023-11-29 03:32:48,116 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 52 remaining) [2023-11-29 03:32:48,116 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 52 remaining) [2023-11-29 03:32:48,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 52 remaining) [2023-11-29 03:32:48,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 52 remaining) [2023-11-29 03:32:48,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 52 remaining) [2023-11-29 03:32:48,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 52 remaining) [2023-11-29 03:32:48,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 52 remaining) [2023-11-29 03:32:48,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 52 remaining) [2023-11-29 03:32:48,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 52 remaining) [2023-11-29 03:32:48,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 52 remaining) [2023-11-29 03:32:48,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 52 remaining) [2023-11-29 03:32:48,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 52 remaining) [2023-11-29 03:32:48,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 52 remaining) [2023-11-29 03:32:48,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 52 remaining) [2023-11-29 03:32:48,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 52 remaining) [2023-11-29 03:32:48,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 52 remaining) [2023-11-29 03:32:48,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 52 remaining) [2023-11-29 03:32:48,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 52 remaining) [2023-11-29 03:32:48,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 52 remaining) [2023-11-29 03:32:48,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 52 remaining) [2023-11-29 03:32:48,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 52 remaining) [2023-11-29 03:32:48,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 52 remaining) [2023-11-29 03:32:48,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 52 remaining) [2023-11-29 03:32:48,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 52 remaining) [2023-11-29 03:32:48,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 52 remaining) [2023-11-29 03:32:48,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK (24 of 52 remaining) [2023-11-29 03:32:48,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (23 of 52 remaining) [2023-11-29 03:32:48,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 52 remaining) [2023-11-29 03:32:48,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 52 remaining) [2023-11-29 03:32:48,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 52 remaining) [2023-11-29 03:32:48,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 52 remaining) [2023-11-29 03:32:48,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 52 remaining) [2023-11-29 03:32:48,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 52 remaining) [2023-11-29 03:32:48,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 52 remaining) [2023-11-29 03:32:48,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 52 remaining) [2023-11-29 03:32:48,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 52 remaining) [2023-11-29 03:32:48,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 52 remaining) [2023-11-29 03:32:48,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 52 remaining) [2023-11-29 03:32:48,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 52 remaining) [2023-11-29 03:32:48,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 52 remaining) [2023-11-29 03:32:48,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 52 remaining) [2023-11-29 03:32:48,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 52 remaining) [2023-11-29 03:32:48,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 52 remaining) [2023-11-29 03:32:48,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 52 remaining) [2023-11-29 03:32:48,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 52 remaining) [2023-11-29 03:32:48,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 52 remaining) [2023-11-29 03:32:48,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 52 remaining) [2023-11-29 03:32:48,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 52 remaining) [2023-11-29 03:32:48,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 52 remaining) [2023-11-29 03:32:48,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 52 remaining) [2023-11-29 03:32:48,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-29 03:32:48,123 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:32:48,130 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-29 03:32:48,130 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 03:32:48,161 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-29 03:32:48,165 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre42 could not be translated [2023-11-29 03:32:48,176 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 03:32:48 BasicIcfg [2023-11-29 03:32:48,177 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 03:32:48,178 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 03:32:48,178 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 03:32:48,178 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 03:32:48,179 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 03:32:31" (3/4) ... [2023-11-29 03:32:48,180 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-29 03:32:48,192 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-29 03:32:48,193 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre42 could not be translated [2023-11-29 03:32:48,230 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-29 03:32:48,230 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 03:32:48,231 INFO L158 Benchmark]: Toolchain (without parser) took 18333.26ms. Allocated memory was 178.3MB in the beginning and 400.6MB in the end (delta: 222.3MB). Free memory was 139.0MB in the beginning and 204.7MB in the end (delta: -65.7MB). Peak memory consumption was 159.5MB. Max. memory is 16.1GB. [2023-11-29 03:32:48,231 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 107.0MB. Free memory is still 56.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 03:32:48,232 INFO L158 Benchmark]: CACSL2BoogieTranslator took 760.18ms. Allocated memory is still 178.3MB. Free memory was 139.0MB in the beginning and 145.9MB in the end (delta: -7.0MB). Peak memory consumption was 47.3MB. Max. memory is 16.1GB. [2023-11-29 03:32:48,232 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.68ms. Allocated memory is still 178.3MB. Free memory was 145.9MB in the beginning and 142.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-29 03:32:48,233 INFO L158 Benchmark]: Boogie Preprocessor took 64.79ms. Allocated memory is still 178.3MB. Free memory was 142.8MB in the beginning and 139.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 03:32:48,233 INFO L158 Benchmark]: RCFGBuilder took 717.45ms. Allocated memory is still 178.3MB. Free memory was 139.7MB in the beginning and 91.5MB in the end (delta: 48.2MB). Peak memory consumption was 48.2MB. Max. memory is 16.1GB. [2023-11-29 03:32:48,233 INFO L158 Benchmark]: TraceAbstraction took 16674.93ms. Allocated memory was 178.3MB in the beginning and 400.6MB in the end (delta: 222.3MB). Free memory was 90.4MB in the beginning and 209.9MB in the end (delta: -119.5MB). Peak memory consumption was 101.7MB. Max. memory is 16.1GB. [2023-11-29 03:32:48,234 INFO L158 Benchmark]: Witness Printer took 52.57ms. Allocated memory is still 400.6MB. Free memory was 209.9MB in the beginning and 204.7MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-29 03:32:48,236 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 107.0MB. Free memory is still 56.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 760.18ms. Allocated memory is still 178.3MB. Free memory was 139.0MB in the beginning and 145.9MB in the end (delta: -7.0MB). Peak memory consumption was 47.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.68ms. Allocated memory is still 178.3MB. Free memory was 145.9MB in the beginning and 142.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 64.79ms. Allocated memory is still 178.3MB. Free memory was 142.8MB in the beginning and 139.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 717.45ms. Allocated memory is still 178.3MB. Free memory was 139.7MB in the beginning and 91.5MB in the end (delta: 48.2MB). Peak memory consumption was 48.2MB. Max. memory is 16.1GB. * TraceAbstraction took 16674.93ms. Allocated memory was 178.3MB in the beginning and 400.6MB in the end (delta: 222.3MB). Free memory was 90.4MB in the beginning and 209.9MB in the end (delta: -119.5MB). Peak memory consumption was 101.7MB. Max. memory is 16.1GB. * Witness Printer took 52.57ms. Allocated memory is still 400.6MB. Free memory was 209.9MB in the beginning and 204.7MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre42 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre42 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L1232-L1235] 0 struct cache { struct s *slots[10]; pthread_mutex_t mutex[10]; } c; [L1232-L1235] 0 struct cache { struct s *slots[10]; pthread_mutex_t mutex[10]; } c; [L1232-L1235] 0 struct cache { struct s *slots[10]; pthread_mutex_t mutex[10]; } c; [L1256] 0 int i = 0; VAL [c={1:0}, i=0] [L1256] COND TRUE 0 i < 10 [L1256] 0 i++ VAL [c={1:0}, i=1] [L1256] COND TRUE 0 i < 10 [L1256] 0 i++ VAL [c={1:0}, i=2] [L1256] COND TRUE 0 i < 10 [L1256] 0 i++ VAL [c={1:0}, i=3] [L1256] COND TRUE 0 i < 10 [L1256] 0 i++ VAL [c={1:0}, i=4] [L1256] COND TRUE 0 i < 10 [L1256] 0 i++ VAL [c={1:0}, i=5] [L1256] COND TRUE 0 i < 10 [L1256] 0 i++ VAL [c={1:0}, i=6] [L1256] COND TRUE 0 i < 10 [L1256] 0 i++ VAL [c={1:0}, i=7] [L1256] COND TRUE 0 i < 10 [L1256] 0 i++ VAL [c={1:0}, i=8] [L1256] COND TRUE 0 i < 10 [L1256] 0 i++ VAL [c={1:0}, i=9] [L1256] COND TRUE 0 i < 10 [L1256] 0 i++ VAL [c={1:0}, i=10] [L1256] COND FALSE 0 !(i < 10) [L1258] 0 int j = __VERIFIER_nondet_int(); [L1259] CALL 0 assume_abort_if_not(0 <= j && j < 10) [L11] COND FALSE 0 !(!cond) [L1259] RET 0 assume_abort_if_not(0 <= j && j < 10) [L1260] 0 struct s *p; [L1261] 0 pthread_t t1; [L1262] CALL, EXPR 0 new(1) [L1237] 0 struct s *p = malloc(sizeof(struct s)); [L1238] 0 p->datum = x VAL [c={1:0}] [L1239] 0 p->next = ((void *)0) [L1240] 0 return p; [L1262] RET, EXPR 0 new(1) [L1262] 0 c.slots[j] = new(1) [L1263] CALL, EXPR 0 new(2) [L1237] 0 struct s *p = malloc(sizeof(struct s)); [L1238] 0 p->datum = x VAL [c={1:0}] [L1239] 0 p->next = ((void *)0) [L1240] 0 return p; [L1263] RET, EXPR 0 new(2) [L1263] EXPR 0 c.slots[j] [L1263] CALL 0 list_add(new(2), c.slots[j]) [L1243] EXPR 0 list->next [L1243] 0 struct s *temp = list->next; [L1244] 0 list->next = node VAL [c={1:0}] [L1245] 0 node->next = temp [L1263] RET 0 list_add(new(2), c.slots[j]) [L1264] FCALL, FORK 0 pthread_create(&t1, ((void *)0), t_fun, ((void *)0)) VAL [c={1:0}, j=2, t1={5:0}] [L1248] 1 int i = __VERIFIER_nondet_int(); [L1249] CALL 1 assume_abort_if_not(0 <= i && i < 10) [L11] COND FALSE 1 !(!cond) [L1249] RET 1 assume_abort_if_not(0 <= i && i < 10) [L1251] CALL, EXPR 1 new(3) [L1237] 1 struct s *p = malloc(sizeof(struct s)); [L1238] 1 p->datum = x VAL [arg={0:0}, arg={0:0}, c={1:0}, i=1] [L1239] 1 p->next = ((void *)0) [L1240] 1 return p; [L1251] RET, EXPR 1 new(3) [L1251] EXPR 1 c.slots[i] [L1251] CALL 1 list_add(new(3), c.slots[i]) [L1243] 1 list->next - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1255]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1264]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 99 locations, 52 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 16.5s, OverallIterations: 21, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 9.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3985 SdHoareTripleChecker+Valid, 7.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2931 mSDsluCounter, 1607 SdHoareTripleChecker+Invalid, 6.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1555 mSDsCounter, 159 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11099 IncrementalHoareTripleChecker+Invalid, 11258 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 159 mSolverCounterUnsat, 52 mSDtfsCounter, 11099 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 147 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=448occurred in iteration=20, InterpolantAutomatonStates: 122, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 426 NumberOfCodeBlocks, 426 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 3233 SizeOfPredicates, 0 NumberOfNonLiveVariables, 141 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 24 InterpolantComputations, 18 PerfectInterpolantSequences, 890/923 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-29 03:32:48,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6cb4dcb7-a6e9-4eeb-936c-b7ced57524b8/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)