./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-word-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a 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_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU --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 9cb2b0cbecf02e8cce2fd890595fb88c3204482a27ce7ac6f4ef6fb92949d747 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:17:37,513 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:17:37,622 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:17:37,631 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:17:37,632 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:17:37,675 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:17:37,675 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:17:37,676 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:17:37,677 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:17:37,679 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:17:37,679 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:17:37,680 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:17:37,681 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:17:37,681 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:17:37,684 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:17:37,684 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:17:37,685 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:17:37,685 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:17:37,686 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:17:37,689 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:17:37,689 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:17:37,690 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:17:37,690 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:17:37,690 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:17:37,691 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:17:37,691 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:17:37,692 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:17:37,710 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:17:37,711 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:17:37,711 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:17:37,711 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:17:37,712 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:17:37,712 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:17:37,713 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:17:37,713 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:17:37,713 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:17:37,719 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:17:37,720 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:17:37,720 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:17:37,722 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:17:37,723 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:17:37,727 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:17:37,727 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_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9cb2b0cbecf02e8cce2fd890595fb88c3204482a27ce7ac6f4ef6fb92949d747 [2024-10-31 22:17:38,084 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:17:38,119 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:17:38,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:17:38,124 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:17:38,125 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:17:38,126 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/chl-word-trans.wvr.c Unable to find full path for "g++" [2024-10-31 22:17:40,645 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:17:40,929 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:17:40,930 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/sv-benchmarks/c/weaver/chl-word-trans.wvr.c [2024-10-31 22:17:40,941 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/data/51fb5c680/d8a006c9d7654ab88aca0115541ae36a/FLAG1cc21e356 [2024-10-31 22:17:40,963 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/data/51fb5c680/d8a006c9d7654ab88aca0115541ae36a [2024-10-31 22:17:40,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:17:40,972 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:17:40,975 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:17:40,975 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:17:40,982 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:17:40,983 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:17:40" (1/1) ... [2024-10-31 22:17:40,985 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6098c98e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:40, skipping insertion in model container [2024-10-31 22:17:40,985 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:17:40" (1/1) ... [2024-10-31 22:17:41,019 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:17:41,310 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-10-31 22:17:41,314 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:17:41,327 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:17:41,367 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:17:41,391 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:17:41,391 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:41 WrapperNode [2024-10-31 22:17:41,392 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:17:41,393 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:17:41,393 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:17:41,393 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:17:41,403 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:41" (1/1) ... [2024-10-31 22:17:41,414 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:41" (1/1) ... [2024-10-31 22:17:41,443 INFO L138 Inliner]: procedures = 24, calls = 30, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 167 [2024-10-31 22:17:41,444 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:17:41,445 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:17:41,445 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:17:41,445 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:17:41,460 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:41" (1/1) ... [2024-10-31 22:17:41,460 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:41" (1/1) ... [2024-10-31 22:17:41,465 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:41" (1/1) ... [2024-10-31 22:17:41,501 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-10-31 22:17:41,502 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:41" (1/1) ... [2024-10-31 22:17:41,506 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:41" (1/1) ... [2024-10-31 22:17:41,523 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:41" (1/1) ... [2024-10-31 22:17:41,528 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:41" (1/1) ... [2024-10-31 22:17:41,531 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:41" (1/1) ... [2024-10-31 22:17:41,533 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:41" (1/1) ... [2024-10-31 22:17:41,537 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:17:41,538 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:17:41,539 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:17:41,539 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:17:41,540 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:41" (1/1) ... [2024-10-31 22:17:41,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:17:41,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:41,593 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:17:41,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:17:41,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:17:41,626 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:17:41,626 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:17:41,626 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:17:41,626 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:17:41,627 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-31 22:17:41,627 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-31 22:17:41,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:17:41,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:17:41,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:17:41,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:17:41,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:17:41,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:17:41,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:17:41,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:17:41,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:17:41,631 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:17:41,787 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:17:41,790 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:17:42,579 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:17:42,579 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:17:43,233 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:17:43,233 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-31 22:17:43,234 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:17:43 BoogieIcfgContainer [2024-10-31 22:17:43,234 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:17:43,239 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:17:43,239 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:17:43,244 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:17:43,245 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:17:40" (1/3) ... [2024-10-31 22:17:43,247 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0219af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:17:43, skipping insertion in model container [2024-10-31 22:17:43,248 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:41" (2/3) ... [2024-10-31 22:17:43,248 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d0219af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:17:43, skipping insertion in model container [2024-10-31 22:17:43,248 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:17:43" (3/3) ... [2024-10-31 22:17:43,250 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-trans.wvr.c [2024-10-31 22:17:43,274 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:17:43,275 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-10-31 22:17:43,275 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:17:43,390 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-31 22:17:43,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 96 transitions, 213 flow [2024-10-31 22:17:43,503 INFO L124 PetriNetUnfolderBase]: 12/93 cut-off events. [2024-10-31 22:17:43,504 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 22:17:43,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 93 events. 12/93 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 316 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2024-10-31 22:17:43,511 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 96 transitions, 213 flow [2024-10-31 22:17:43,516 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 92 transitions, 202 flow [2024-10-31 22:17:43,531 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:17:43,543 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@26e633b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:17:43,544 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-10-31 22:17:43,548 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:17:43,548 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 22:17:43,549 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:17:43,549 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:43,550 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:17:43,550 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-10-31 22:17:43,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:43,558 INFO L85 PathProgramCache]: Analyzing trace with hash 775074, now seen corresponding path program 1 times [2024-10-31 22:17:43,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:43,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271428145] [2024-10-31 22:17:43,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:43,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:43,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:43,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271428145] [2024-10-31 22:17:43,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271428145] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:43,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:43,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:17:43,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724207457] [2024-10-31 22:17:43,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:43,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:17:43,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:44,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:17:44,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:17:44,143 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-10-31 22:17:44,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2024-10-31 22:17:44,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:44,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-10-31 22:17:44,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:45,042 INFO L124 PetriNetUnfolderBase]: 2712/4947 cut-off events. [2024-10-31 22:17:45,043 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2024-10-31 22:17:45,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8698 conditions, 4947 events. 2712/4947 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34503 event pairs, 1692 based on Foata normal form. 1/3396 useless extension candidates. Maximal degree in co-relation 8222. Up to 3567 conditions per place. [2024-10-31 22:17:45,091 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 45 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2024-10-31 22:17:45,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 87 transitions, 286 flow [2024-10-31 22:17:45,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:17:45,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:17:45,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2024-10-31 22:17:45,106 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-10-31 22:17:45,109 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 202 flow. Second operand 3 states and 183 transitions. [2024-10-31 22:17:45,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 87 transitions, 286 flow [2024-10-31 22:17:45,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 274 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 22:17:45,124 INFO L231 Difference]: Finished difference. Result has 81 places, 87 transitions, 184 flow [2024-10-31 22:17:45,126 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=81, PETRI_TRANSITIONS=87} [2024-10-31 22:17:45,130 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -9 predicate places. [2024-10-31 22:17:45,132 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 87 transitions, 184 flow [2024-10-31 22:17:45,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2024-10-31 22:17:45,132 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:45,133 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:17:45,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:17:45,133 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-10-31 22:17:45,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:45,135 INFO L85 PathProgramCache]: Analyzing trace with hash 775075, now seen corresponding path program 1 times [2024-10-31 22:17:45,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:45,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429490034] [2024-10-31 22:17:45,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:45,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:45,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:45,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:45,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429490034] [2024-10-31 22:17:45,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429490034] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:45,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:45,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:17:45,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069092826] [2024-10-31 22:17:45,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:45,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:17:45,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:45,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:17:45,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:17:45,735 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-10-31 22:17:45,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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) [2024-10-31 22:17:45,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:45,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-10-31 22:17:45,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:46,478 INFO L124 PetriNetUnfolderBase]: 2712/4946 cut-off events. [2024-10-31 22:17:46,478 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-10-31 22:17:46,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8585 conditions, 4946 events. 2712/4946 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34539 event pairs, 1692 based on Foata normal form. 0/3393 useless extension candidates. Maximal degree in co-relation 8556. Up to 3575 conditions per place. [2024-10-31 22:17:46,520 INFO L140 encePairwiseOnDemand]: 91/96 looper letters, 45 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2024-10-31 22:17:46,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 280 flow [2024-10-31 22:17:46,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:17:46,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:17:46,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 226 transitions. [2024-10-31 22:17:46,525 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5885416666666666 [2024-10-31 22:17:46,525 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 184 flow. Second operand 4 states and 226 transitions. [2024-10-31 22:17:46,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 280 flow [2024-10-31 22:17:46,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 86 transitions, 276 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:17:46,530 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 186 flow [2024-10-31 22:17:46,530 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-10-31 22:17:46,531 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -9 predicate places. [2024-10-31 22:17:46,531 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 186 flow [2024-10-31 22:17:46,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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) [2024-10-31 22:17:46,531 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:46,532 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-31 22:17:46,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:17:46,533 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-10-31 22:17:46,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:46,534 INFO L85 PathProgramCache]: Analyzing trace with hash 24028939, now seen corresponding path program 1 times [2024-10-31 22:17:46,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:46,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811658176] [2024-10-31 22:17:46,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:46,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:46,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:46,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811658176] [2024-10-31 22:17:46,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811658176] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:46,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:46,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:17:46,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165789025] [2024-10-31 22:17:46,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:46,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:17:46,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:46,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:17:46,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:17:47,117 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-10-31 22:17:47,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 186 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) [2024-10-31 22:17:47,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:47,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-10-31 22:17:47,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:47,889 INFO L124 PetriNetUnfolderBase]: 2714/4952 cut-off events. [2024-10-31 22:17:47,890 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-10-31 22:17:47,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8602 conditions, 4952 events. 2714/4952 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 34630 event pairs, 1692 based on Foata normal form. 0/3396 useless extension candidates. Maximal degree in co-relation 8578. Up to 3578 conditions per place. [2024-10-31 22:17:47,933 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 48 selfloop transitions, 7 changer transitions 0/92 dead transitions. [2024-10-31 22:17:47,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 92 transitions, 314 flow [2024-10-31 22:17:47,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:17:47,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:17:47,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 276 transitions. [2024-10-31 22:17:47,938 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-10-31 22:17:47,939 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 186 flow. Second operand 5 states and 276 transitions. [2024-10-31 22:17:47,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 92 transitions, 314 flow [2024-10-31 22:17:47,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 92 transitions, 300 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:17:47,946 INFO L231 Difference]: Finished difference. Result has 85 places, 92 transitions, 231 flow [2024-10-31 22:17:47,947 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=85, PETRI_TRANSITIONS=92} [2024-10-31 22:17:47,948 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -5 predicate places. [2024-10-31 22:17:47,948 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 92 transitions, 231 flow [2024-10-31 22:17:47,948 INFO L472 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) [2024-10-31 22:17:47,948 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:47,948 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 22:17:47,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:17:47,950 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-10-31 22:17:47,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:47,951 INFO L85 PathProgramCache]: Analyzing trace with hash 744899006, now seen corresponding path program 1 times [2024-10-31 22:17:47,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:47,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801875720] [2024-10-31 22:17:47,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:47,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:48,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:48,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:48,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801875720] [2024-10-31 22:17:48,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801875720] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:48,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:48,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:17:48,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974474439] [2024-10-31 22:17:48,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:48,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:17:48,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:48,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:17:48,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:17:48,503 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-10-31 22:17:48,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 92 transitions, 231 flow. Second operand has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 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) [2024-10-31 22:17:48,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:48,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-10-31 22:17:48,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:49,373 INFO L124 PetriNetUnfolderBase]: 2715/4955 cut-off events. [2024-10-31 22:17:49,373 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-10-31 22:17:49,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8624 conditions, 4955 events. 2715/4955 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 34648 event pairs, 1692 based on Foata normal form. 0/3401 useless extension candidates. Maximal degree in co-relation 8580. Up to 3581 conditions per place. [2024-10-31 22:17:49,409 INFO L140 encePairwiseOnDemand]: 87/96 looper letters, 49 selfloop transitions, 9 changer transitions 0/95 dead transitions. [2024-10-31 22:17:49,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 95 transitions, 353 flow [2024-10-31 22:17:49,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:17:49,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:17:49,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 276 transitions. [2024-10-31 22:17:49,412 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-10-31 22:17:49,412 INFO L175 Difference]: Start difference. First operand has 85 places, 92 transitions, 231 flow. Second operand 5 states and 276 transitions. [2024-10-31 22:17:49,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 95 transitions, 353 flow [2024-10-31 22:17:49,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 95 transitions, 352 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:17:49,417 INFO L231 Difference]: Finished difference. Result has 90 places, 95 transitions, 273 flow [2024-10-31 22:17:49,418 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=90, PETRI_TRANSITIONS=95} [2024-10-31 22:17:49,420 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 0 predicate places. [2024-10-31 22:17:49,420 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 95 transitions, 273 flow [2024-10-31 22:17:49,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 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) [2024-10-31 22:17:49,421 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:49,421 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-31 22:17:49,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:17:49,423 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-10-31 22:17:49,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:49,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1616998019, now seen corresponding path program 1 times [2024-10-31 22:17:49,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:49,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580687444] [2024-10-31 22:17:49,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:49,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:49,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:49,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:49,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580687444] [2024-10-31 22:17:49,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580687444] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:49,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74029799] [2024-10-31 22:17:49,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:49,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:49,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:49,813 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:17:49,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:17:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:49,997 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-31 22:17:50,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:17:50,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-10-31 22:17:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:50,374 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:17:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:50,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74029799] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:17:50,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:17:50,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-10-31 22:17:50,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793831604] [2024-10-31 22:17:50,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:17:50,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:17:50,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:50,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:17:50,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:17:51,722 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-10-31 22:17:51,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 95 transitions, 273 flow. Second operand has 13 states, 13 states have (on average 45.30769230769231) internal successors, (589), 13 states have internal predecessors, (589), 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) [2024-10-31 22:17:51,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:51,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-10-31 22:17:51,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:52,720 INFO L124 PetriNetUnfolderBase]: 2717/4960 cut-off events. [2024-10-31 22:17:52,720 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-10-31 22:17:52,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8662 conditions, 4960 events. 2717/4960 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 34697 event pairs, 1692 based on Foata normal form. 0/3409 useless extension candidates. Maximal degree in co-relation 8602. Up to 3575 conditions per place. [2024-10-31 22:17:52,759 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 45 selfloop transitions, 18 changer transitions 0/100 dead transitions. [2024-10-31 22:17:52,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 100 transitions, 424 flow [2024-10-31 22:17:52,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:17:52,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:17:52,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 458 transitions. [2024-10-31 22:17:52,762 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5300925925925926 [2024-10-31 22:17:52,763 INFO L175 Difference]: Start difference. First operand has 90 places, 95 transitions, 273 flow. Second operand 9 states and 458 transitions. [2024-10-31 22:17:52,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 100 transitions, 424 flow [2024-10-31 22:17:52,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 100 transitions, 416 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:17:52,767 INFO L231 Difference]: Finished difference. Result has 95 places, 100 transitions, 326 flow [2024-10-31 22:17:52,768 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=326, PETRI_PLACES=95, PETRI_TRANSITIONS=100} [2024-10-31 22:17:52,768 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 5 predicate places. [2024-10-31 22:17:52,769 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 100 transitions, 326 flow [2024-10-31 22:17:52,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.30769230769231) internal successors, (589), 13 states have internal predecessors, (589), 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) [2024-10-31 22:17:52,770 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:52,770 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-31 22:17:52,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:17:52,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:52,976 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-10-31 22:17:52,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:52,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1411568643, now seen corresponding path program 1 times [2024-10-31 22:17:52,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:52,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271628451] [2024-10-31 22:17:52,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:52,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:53,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:53,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271628451] [2024-10-31 22:17:53,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271628451] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:53,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947728031] [2024-10-31 22:17:53,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:53,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:53,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:53,316 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:17:53,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:17:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:53,431 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-31 22:17:53,433 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:17:53,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-10-31 22:17:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:53,698 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:17:53,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:53,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947728031] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:17:53,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:17:53,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-10-31 22:17:53,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290471328] [2024-10-31 22:17:53,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:17:53,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:17:53,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:53,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:17:53,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:17:55,361 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-10-31 22:17:55,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 100 transitions, 326 flow. Second operand has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 states have internal predecessors, (591), 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) [2024-10-31 22:17:55,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:55,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-10-31 22:17:55,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:56,460 INFO L124 PetriNetUnfolderBase]: 2718/4962 cut-off events. [2024-10-31 22:17:56,461 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-10-31 22:17:56,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8682 conditions, 4962 events. 2718/4962 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 34655 event pairs, 1692 based on Foata normal form. 0/3411 useless extension candidates. Maximal degree in co-relation 8610. Up to 3577 conditions per place. [2024-10-31 22:17:56,502 INFO L140 encePairwiseOnDemand]: 87/96 looper letters, 43 selfloop transitions, 22 changer transitions 0/102 dead transitions. [2024-10-31 22:17:56,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 102 transitions, 464 flow [2024-10-31 22:17:56,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:17:56,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:17:56,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 457 transitions. [2024-10-31 22:17:56,504 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5289351851851852 [2024-10-31 22:17:56,504 INFO L175 Difference]: Start difference. First operand has 95 places, 100 transitions, 326 flow. Second operand 9 states and 457 transitions. [2024-10-31 22:17:56,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 102 transitions, 464 flow [2024-10-31 22:17:56,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 102 transitions, 418 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-10-31 22:17:56,510 INFO L231 Difference]: Finished difference. Result has 96 places, 102 transitions, 332 flow [2024-10-31 22:17:56,510 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=332, PETRI_PLACES=96, PETRI_TRANSITIONS=102} [2024-10-31 22:17:56,513 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 6 predicate places. [2024-10-31 22:17:56,513 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 102 transitions, 332 flow [2024-10-31 22:17:56,514 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 states have internal predecessors, (591), 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) [2024-10-31 22:17:56,514 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:56,514 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:56,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:17:56,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:56,715 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-10-31 22:17:56,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:56,716 INFO L85 PathProgramCache]: Analyzing trace with hash 856152628, now seen corresponding path program 1 times [2024-10-31 22:17:56,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:56,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646389118] [2024-10-31 22:17:56,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:56,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:56,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:56,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646389118] [2024-10-31 22:17:56,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646389118] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:56,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:56,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:17:56,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590524231] [2024-10-31 22:17:56,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:56,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:17:56,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:56,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:17:56,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:17:56,836 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-10-31 22:17:56,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 102 transitions, 332 flow. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 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) [2024-10-31 22:17:56,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:56,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-10-31 22:17:56,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:57,793 INFO L124 PetriNetUnfolderBase]: 5204/9287 cut-off events. [2024-10-31 22:17:57,794 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-10-31 22:17:57,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16450 conditions, 9287 events. 5204/9287 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 69835 event pairs, 2894 based on Foata normal form. 0/6441 useless extension candidates. Maximal degree in co-relation 9726. Up to 4040 conditions per place. [2024-10-31 22:17:57,858 INFO L140 encePairwiseOnDemand]: 84/96 looper letters, 123 selfloop transitions, 18 changer transitions 0/177 dead transitions. [2024-10-31 22:17:57,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 177 transitions, 842 flow [2024-10-31 22:17:57,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:17:57,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:17:57,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 395 transitions. [2024-10-31 22:17:57,862 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6857638888888888 [2024-10-31 22:17:57,862 INFO L175 Difference]: Start difference. First operand has 96 places, 102 transitions, 332 flow. Second operand 6 states and 395 transitions. [2024-10-31 22:17:57,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 177 transitions, 842 flow [2024-10-31 22:17:57,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 177 transitions, 764 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-10-31 22:17:57,868 INFO L231 Difference]: Finished difference. Result has 98 places, 117 transitions, 443 flow [2024-10-31 22:17:57,868 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=443, PETRI_PLACES=98, PETRI_TRANSITIONS=117} [2024-10-31 22:17:57,870 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 8 predicate places. [2024-10-31 22:17:57,870 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 117 transitions, 443 flow [2024-10-31 22:17:57,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 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) [2024-10-31 22:17:57,870 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:57,870 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:57,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:17:57,871 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-10-31 22:17:57,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:57,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1918678218, now seen corresponding path program 1 times [2024-10-31 22:17:57,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:57,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380852089] [2024-10-31 22:17:57,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:57,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:17:57,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:57,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380852089] [2024-10-31 22:17:57,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380852089] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:57,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:57,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:17:57,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082257089] [2024-10-31 22:17:57,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:57,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:17:57,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:57,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:17:57,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:17:58,031 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-10-31 22:17:58,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 117 transitions, 443 flow. Second operand has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 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) [2024-10-31 22:17:58,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:58,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-10-31 22:17:58,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:59,885 INFO L124 PetriNetUnfolderBase]: 9500/17109 cut-off events. [2024-10-31 22:17:59,886 INFO L125 PetriNetUnfolderBase]: For 1749/1749 co-relation queries the response was YES. [2024-10-31 22:17:59,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31679 conditions, 17109 events. 9500/17109 cut-off events. For 1749/1749 co-relation queries the response was YES. Maximal size of possible extension queue 1006. Compared 142463 event pairs, 5298 based on Foata normal form. 114/12620 useless extension candidates. Maximal degree in co-relation 22707. Up to 6942 conditions per place. [2024-10-31 22:17:59,992 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 145 selfloop transitions, 10 changer transitions 0/191 dead transitions. [2024-10-31 22:17:59,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 191 transitions, 983 flow [2024-10-31 22:17:59,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:17:59,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:17:59,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 342 transitions. [2024-10-31 22:17:59,994 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7125 [2024-10-31 22:17:59,994 INFO L175 Difference]: Start difference. First operand has 98 places, 117 transitions, 443 flow. Second operand 5 states and 342 transitions. [2024-10-31 22:17:59,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 191 transitions, 983 flow [2024-10-31 22:18:00,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 191 transitions, 979 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-31 22:18:00,002 INFO L231 Difference]: Finished difference. Result has 103 places, 121 transitions, 498 flow [2024-10-31 22:18:00,003 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=498, PETRI_PLACES=103, PETRI_TRANSITIONS=121} [2024-10-31 22:18:00,006 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 13 predicate places. [2024-10-31 22:18:00,007 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 121 transitions, 498 flow [2024-10-31 22:18:00,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 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) [2024-10-31 22:18:00,007 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:18:00,007 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:18:00,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:18:00,007 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-10-31 22:18:00,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:00,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1193415617, now seen corresponding path program 1 times [2024-10-31 22:18:00,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:00,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119329811] [2024-10-31 22:18:00,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:00,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:18:00,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:00,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119329811] [2024-10-31 22:18:00,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119329811] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:18:00,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:18:00,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:18:00,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737108901] [2024-10-31 22:18:00,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:18:00,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:18:00,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:00,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:18:00,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:18:00,152 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-10-31 22:18:00,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 121 transitions, 498 flow. Second operand has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 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) [2024-10-31 22:18:00,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:18:00,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-10-31 22:18:00,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:18:01,522 INFO L124 PetriNetUnfolderBase]: 8828/16221 cut-off events. [2024-10-31 22:18:01,522 INFO L125 PetriNetUnfolderBase]: For 5585/5585 co-relation queries the response was YES. [2024-10-31 22:18:01,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31239 conditions, 16221 events. 8828/16221 cut-off events. For 5585/5585 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 134802 event pairs, 5194 based on Foata normal form. 0/11714 useless extension candidates. Maximal degree in co-relation 23054. Up to 7338 conditions per place. [2024-10-31 22:18:01,629 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 142 selfloop transitions, 8 changer transitions 0/186 dead transitions. [2024-10-31 22:18:01,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 186 transitions, 1026 flow [2024-10-31 22:18:01,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:18:01,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:18:01,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 335 transitions. [2024-10-31 22:18:01,632 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6979166666666666 [2024-10-31 22:18:01,632 INFO L175 Difference]: Start difference. First operand has 103 places, 121 transitions, 498 flow. Second operand 5 states and 335 transitions. [2024-10-31 22:18:01,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 186 transitions, 1026 flow [2024-10-31 22:18:01,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 186 transitions, 1015 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:18:01,646 INFO L231 Difference]: Finished difference. Result has 107 places, 123 transitions, 518 flow [2024-10-31 22:18:01,646 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=518, PETRI_PLACES=107, PETRI_TRANSITIONS=123} [2024-10-31 22:18:01,647 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 17 predicate places. [2024-10-31 22:18:01,647 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 123 transitions, 518 flow [2024-10-31 22:18:01,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 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) [2024-10-31 22:18:01,648 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:18:01,648 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:18:01,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:18:01,649 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-10-31 22:18:01,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:01,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1303113116, now seen corresponding path program 1 times [2024-10-31 22:18:01,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:01,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889839186] [2024-10-31 22:18:01,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:01,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:01,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:18:01,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:01,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889839186] [2024-10-31 22:18:01,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889839186] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:18:01,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:18:01,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:18:01,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297929463] [2024-10-31 22:18:01,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:18:01,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:18:01,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:01,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:18:01,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:18:01,814 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-10-31 22:18:01,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 123 transitions, 518 flow. Second operand has 5 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) [2024-10-31 22:18:01,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:18:01,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-10-31 22:18:01,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:18:03,054 INFO L124 PetriNetUnfolderBase]: 7930/14288 cut-off events. [2024-10-31 22:18:03,055 INFO L125 PetriNetUnfolderBase]: For 6576/6576 co-relation queries the response was YES. [2024-10-31 22:18:03,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29363 conditions, 14288 events. 7930/14288 cut-off events. For 6576/6576 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 111809 event pairs, 4896 based on Foata normal form. 0/10888 useless extension candidates. Maximal degree in co-relation 21587. Up to 6601 conditions per place. [2024-10-31 22:18:03,159 INFO L140 encePairwiseOnDemand]: 84/96 looper letters, 127 selfloop transitions, 18 changer transitions 0/181 dead transitions. [2024-10-31 22:18:03,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 181 transitions, 999 flow [2024-10-31 22:18:03,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:18:03,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:18:03,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 387 transitions. [2024-10-31 22:18:03,162 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.671875 [2024-10-31 22:18:03,162 INFO L175 Difference]: Start difference. First operand has 107 places, 123 transitions, 518 flow. Second operand 6 states and 387 transitions. [2024-10-31 22:18:03,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 181 transitions, 999 flow [2024-10-31 22:18:03,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 181 transitions, 987 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:18:03,186 INFO L231 Difference]: Finished difference. Result has 112 places, 125 transitions, 570 flow [2024-10-31 22:18:03,186 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=570, PETRI_PLACES=112, PETRI_TRANSITIONS=125} [2024-10-31 22:18:03,187 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 22 predicate places. [2024-10-31 22:18:03,187 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 125 transitions, 570 flow [2024-10-31 22:18:03,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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) [2024-10-31 22:18:03,188 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:18:03,188 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:18:03,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 22:18:03,188 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-10-31 22:18:03,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:03,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1331590473, now seen corresponding path program 1 times [2024-10-31 22:18:03,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:03,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146564961] [2024-10-31 22:18:03,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:03,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:03,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:18:03,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:03,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146564961] [2024-10-31 22:18:03,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146564961] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:18:03,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:18:03,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:18:03,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202646610] [2024-10-31 22:18:03,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:18:03,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:18:03,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:18:03,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:18:03,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:18:03,367 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-10-31 22:18:03,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 125 transitions, 570 flow. Second operand has 5 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) [2024-10-31 22:18:03,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:18:03,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-10-31 22:18:03,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:18:05,498 INFO L124 PetriNetUnfolderBase]: 14398/25606 cut-off events. [2024-10-31 22:18:05,498 INFO L125 PetriNetUnfolderBase]: For 13531/13531 co-relation queries the response was YES. [2024-10-31 22:18:05,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55837 conditions, 25606 events. 14398/25606 cut-off events. For 13531/13531 co-relation queries the response was YES. Maximal size of possible extension queue 1125. Compared 215452 event pairs, 8752 based on Foata normal form. 209/21235 useless extension candidates. Maximal degree in co-relation 40013. Up to 10931 conditions per place. [2024-10-31 22:18:05,663 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 150 selfloop transitions, 13 changer transitions 0/199 dead transitions. [2024-10-31 22:18:05,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 199 transitions, 1184 flow [2024-10-31 22:18:05,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:18:05,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:18:05,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 338 transitions. [2024-10-31 22:18:05,665 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7041666666666667 [2024-10-31 22:18:05,665 INFO L175 Difference]: Start difference. First operand has 112 places, 125 transitions, 570 flow. Second operand 5 states and 338 transitions. [2024-10-31 22:18:05,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 199 transitions, 1184 flow [2024-10-31 22:18:05,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 199 transitions, 1165 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:18:05,718 INFO L231 Difference]: Finished difference. Result has 115 places, 129 transitions, 617 flow [2024-10-31 22:18:05,719 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=617, PETRI_PLACES=115, PETRI_TRANSITIONS=129} [2024-10-31 22:18:05,719 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 25 predicate places. [2024-10-31 22:18:05,719 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 129 transitions, 617 flow [2024-10-31 22:18:05,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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) [2024-10-31 22:18:05,720 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:18:05,720 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:18:05,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 22:18:05,720 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-10-31 22:18:05,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:18:05,721 INFO L85 PathProgramCache]: Analyzing trace with hash 2047314643, now seen corresponding path program 1 times [2024-10-31 22:18:05,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:18:05,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119372815] [2024-10-31 22:18:05,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:05,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:18:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:18:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:18:06,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:18:06,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119372815] [2024-10-31 22:18:06,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119372815] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:18:06,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599702205] [2024-10-31 22:18:06,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:18:06,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:18:06,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:18:06,166 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:18:06,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21ea8fb0-9e74-47b8-b671-3d8445b7537f/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process