./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/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_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/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_cc466c03-6a51-428a-883b-a826640bbebb/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 e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:06:04,306 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:06:04,392 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:06:04,396 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:06:04,397 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:06:04,422 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:06:04,423 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:06:04,423 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:06:04,424 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:06:04,424 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:06:04,425 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:06:04,425 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:06:04,429 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:06:04,430 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:06:04,430 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:06:04,430 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:06:04,431 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:06:04,431 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:06:04,432 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:06:04,432 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:06:04,436 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:06:04,437 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:06:04,437 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:06:04,438 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:06:04,438 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:06:04,438 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:06:04,438 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:06:04,439 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:06:04,439 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:06:04,439 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:06:04,440 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:06:04,440 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:06:04,440 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:06:04,445 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:06:04,445 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:06:04,445 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:06:04,446 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:06:04,446 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:06:04,446 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:06:04,446 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:06:04,447 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:06:04,449 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:06:04,449 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_cc466c03-6a51-428a-883b-a826640bbebb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc [2024-10-31 22:06:04,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:06:04,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:06:04,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:06:04,812 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:06:04,814 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:06:04,815 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c Unable to find full path for "g++" [2024-10-31 22:06:06,983 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:06:07,173 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:06:07,174 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2024-10-31 22:06:07,184 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/data/f93bd5ceb/9c9dd48b5b604e24b24bf27c0d3e48c3/FLAGe1b766747 [2024-10-31 22:06:07,205 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/data/f93bd5ceb/9c9dd48b5b604e24b24bf27c0d3e48c3 [2024-10-31 22:06:07,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:06:07,210 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:06:07,212 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:06:07,213 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:06:07,219 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:06:07,220 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:06:07" (1/1) ... [2024-10-31 22:06:07,221 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f628709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:07, skipping insertion in model container [2024-10-31 22:06:07,221 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:06:07" (1/1) ... [2024-10-31 22:06:07,250 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:06:07,552 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 22:06:07,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:06:07,568 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:06:07,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:06:07,631 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:06:07,631 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:07 WrapperNode [2024-10-31 22:06:07,631 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:06:07,632 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:06:07,633 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:06:07,633 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:06:07,641 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:07" (1/1) ... [2024-10-31 22:06:07,655 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:07" (1/1) ... [2024-10-31 22:06:07,703 INFO L138 Inliner]: procedures = 24, calls = 25, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 221 [2024-10-31 22:06:07,706 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:06:07,706 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:06:07,707 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:06:07,707 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:06:07,718 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:07" (1/1) ... [2024-10-31 22:06:07,719 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:07" (1/1) ... [2024-10-31 22:06:07,722 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:07" (1/1) ... [2024-10-31 22:06:07,751 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-31 22:06:07,752 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:07" (1/1) ... [2024-10-31 22:06:07,752 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:07" (1/1) ... [2024-10-31 22:06:07,764 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:07" (1/1) ... [2024-10-31 22:06:07,770 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:07" (1/1) ... [2024-10-31 22:06:07,775 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:07" (1/1) ... [2024-10-31 22:06:07,777 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:07" (1/1) ... [2024-10-31 22:06:07,783 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:06:07,784 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:06:07,785 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:06:07,785 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:06:07,786 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:07" (1/1) ... [2024-10-31 22:06:07,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:06:07,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:06:07,821 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:06:07,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:06:07,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:06:07,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:06:07,861 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:06:07,861 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:06:07,862 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:06:07,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:06:07,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:06:07,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:06:07,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:06:07,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:06:07,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:06:07,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:06:07,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:06:07,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:06:07,868 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 22:06:08,020 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:06:08,023 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:06:08,515 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:06:08,515 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:06:09,034 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:06:09,035 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-31 22:06:09,035 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:06:09 BoogieIcfgContainer [2024-10-31 22:06:09,035 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:06:09,038 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:06:09,038 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:06:09,041 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:06:09,042 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:06:07" (1/3) ... [2024-10-31 22:06:09,043 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42adaf29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:06:09, skipping insertion in model container [2024-10-31 22:06:09,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:06:07" (2/3) ... [2024-10-31 22:06:09,043 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42adaf29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:06:09, skipping insertion in model container [2024-10-31 22:06:09,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:06:09" (3/3) ... [2024-10-31 22:06:09,045 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2024-10-31 22:06:09,065 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:06:09,065 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2024-10-31 22:06:09,065 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:06:09,132 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:06:09,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 37 transitions, 88 flow [2024-10-31 22:06:09,214 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2024-10-31 22:06:09,214 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:06:09,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 5/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 50 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-10-31 22:06:09,219 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 37 transitions, 88 flow [2024-10-31 22:06:09,224 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 34 transitions, 80 flow [2024-10-31 22:06:09,239 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:06:09,249 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;@351c63d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:06:09,249 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-10-31 22:06:09,256 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:06:09,256 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 22:06:09,256 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:06:09,256 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:09,257 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:06:09,258 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:06:09,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:09,265 INFO L85 PathProgramCache]: Analyzing trace with hash 683369, now seen corresponding path program 1 times [2024-10-31 22:06:09,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:09,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631269094] [2024-10-31 22:06:09,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:09,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:09,665 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 22:06:09,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:09,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631269094] [2024-10-31 22:06:09,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631269094] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:09,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:09,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:06:09,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569525120] [2024-10-31 22:06:09,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:09,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:06:09,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:09,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:06:09,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:06:09,741 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-10-31 22:06:09,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 22:06:09,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:09,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-10-31 22:06:09,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:09,968 INFO L124 PetriNetUnfolderBase]: 128/255 cut-off events. [2024-10-31 22:06:09,969 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-31 22:06:09,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 255 events. 128/255 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 906 event pairs, 100 based on Foata normal form. 1/213 useless extension candidates. Maximal degree in co-relation 450. Up to 221 conditions per place. [2024-10-31 22:06:09,982 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 21 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2024-10-31 22:06:09,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 116 flow [2024-10-31 22:06:09,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:06:09,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:06:10,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-10-31 22:06:10,002 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2024-10-31 22:06:10,006 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 80 flow. Second operand 3 states and 54 transitions. [2024-10-31 22:06:10,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 116 flow [2024-10-31 22:06:10,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 108 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:06:10,015 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 66 flow [2024-10-31 22:06:10,018 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2024-10-31 22:06:10,025 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2024-10-31 22:06:10,026 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 66 flow [2024-10-31 22:06:10,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 22:06:10,027 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:10,027 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:06:10,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:06:10,028 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:06:10,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:10,029 INFO L85 PathProgramCache]: Analyzing trace with hash 683370, now seen corresponding path program 1 times [2024-10-31 22:06:10,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:10,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930062186] [2024-10-31 22:06:10,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:10,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:10,374 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 22:06:10,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:10,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930062186] [2024-10-31 22:06:10,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930062186] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:10,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:10,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:06:10,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965726725] [2024-10-31 22:06:10,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:10,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:06:10,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:10,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:06:10,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:06:10,413 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-10-31 22:06:10,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 22:06:10,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:10,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-10-31 22:06:10,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:10,626 INFO L124 PetriNetUnfolderBase]: 129/258 cut-off events. [2024-10-31 22:06:10,626 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-31 22:06:10,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 258 events. 129/258 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 928 event pairs, 100 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 476. Up to 226 conditions per place. [2024-10-31 22:06:10,629 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 24 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2024-10-31 22:06:10,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 128 flow [2024-10-31 22:06:10,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:06:10,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:06:10,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-10-31 22:06:10,632 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4954954954954955 [2024-10-31 22:06:10,632 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 66 flow. Second operand 3 states and 55 transitions. [2024-10-31 22:06:10,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 128 flow [2024-10-31 22:06:10,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 32 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:06:10,634 INFO L231 Difference]: Finished difference. Result has 32 places, 31 transitions, 81 flow [2024-10-31 22:06:10,635 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=32, PETRI_TRANSITIONS=31} [2024-10-31 22:06:10,636 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2024-10-31 22:06:10,636 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 31 transitions, 81 flow [2024-10-31 22:06:10,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 22:06:10,637 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:10,637 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-31 22:06:10,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:06:10,639 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:06:10,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:10,641 INFO L85 PathProgramCache]: Analyzing trace with hash 656739811, now seen corresponding path program 1 times [2024-10-31 22:06:10,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:10,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043691761] [2024-10-31 22:06:10,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:10,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:11,067 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 22:06:11,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:11,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043691761] [2024-10-31 22:06:11,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043691761] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:06:11,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429687821] [2024-10-31 22:06:11,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:11,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:11,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:06:11,077 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:06:11,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:06:11,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:11,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-31 22:06:11,184 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:06:11,254 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 6 treesize of output 5 [2024-10-31 22:06:11,355 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 22:06:11,355 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:06:11,461 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 22:06:11,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429687821] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:06:11,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:06:11,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-10-31 22:06:11,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419705312] [2024-10-31 22:06:11,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:06:11,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 22:06:11,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:11,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 22:06:11,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:06:11,535 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-10-31 22:06:11,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 81 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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 22:06:11,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:11,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-10-31 22:06:11,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:11,796 INFO L124 PetriNetUnfolderBase]: 129/262 cut-off events. [2024-10-31 22:06:11,797 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-31 22:06:11,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 262 events. 129/262 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 928 event pairs, 100 based on Foata normal form. 2/221 useless extension candidates. Maximal degree in co-relation 500. Up to 226 conditions per place. [2024-10-31 22:06:11,801 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 26 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2024-10-31 22:06:11,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 36 transitions, 156 flow [2024-10-31 22:06:11,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:06:11,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:06:11,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-10-31 22:06:11,805 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2024-10-31 22:06:11,807 INFO L175 Difference]: Start difference. First operand has 32 places, 31 transitions, 81 flow. Second operand 5 states and 80 transitions. [2024-10-31 22:06:11,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 36 transitions, 156 flow [2024-10-31 22:06:11,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 36 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:06:11,809 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 111 flow [2024-10-31 22:06:11,812 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=111, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2024-10-31 22:06:11,813 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2024-10-31 22:06:11,813 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 111 flow [2024-10-31 22:06:11,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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 22:06:11,814 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:11,814 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1] [2024-10-31 22:06:11,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:06:12,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:12,015 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:06:12,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:12,015 INFO L85 PathProgramCache]: Analyzing trace with hash -779276267, now seen corresponding path program 2 times [2024-10-31 22:06:12,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:12,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825556617] [2024-10-31 22:06:12,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:12,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:12,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:12,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825556617] [2024-10-31 22:06:12,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825556617] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:12,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:12,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:06:12,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817455826] [2024-10-31 22:06:12,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:12,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:06:12,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:12,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:06:12,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:06:12,147 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-10-31 22:06:12,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 111 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 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 22:06:12,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:12,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-10-31 22:06:12,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:12,298 INFO L124 PetriNetUnfolderBase]: 128/259 cut-off events. [2024-10-31 22:06:12,299 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-10-31 22:06:12,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 259 events. 128/259 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 909 event pairs, 100 based on Foata normal form. 1/218 useless extension candidates. Maximal degree in co-relation 488. Up to 222 conditions per place. [2024-10-31 22:06:12,302 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 22 selfloop transitions, 6 changer transitions 0/33 dead transitions. [2024-10-31 22:06:12,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 33 transitions, 157 flow [2024-10-31 22:06:12,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:06:12,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:06:12,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 89 transitions. [2024-10-31 22:06:12,306 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4009009009009009 [2024-10-31 22:06:12,308 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 111 flow. Second operand 6 states and 89 transitions. [2024-10-31 22:06:12,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 33 transitions, 157 flow [2024-10-31 22:06:12,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 33 transitions, 146 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-10-31 22:06:12,310 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 102 flow [2024-10-31 22:06:12,310 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=102, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2024-10-31 22:06:12,311 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2024-10-31 22:06:12,311 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 102 flow [2024-10-31 22:06:12,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 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 22:06:12,311 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:12,311 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:12,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:06:12,312 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:06:12,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:12,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1506558022, now seen corresponding path program 1 times [2024-10-31 22:06:12,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:12,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578121285] [2024-10-31 22:06:12,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:12,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:12,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:12,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578121285] [2024-10-31 22:06:12,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578121285] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:06:12,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325890503] [2024-10-31 22:06:12,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:12,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:12,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:06:12,443 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:06:12,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:06:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:12,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:06:12,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:06:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:12,608 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:06:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:12,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325890503] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:06:12,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:06:12,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-31 22:06:12,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661736867] [2024-10-31 22:06:12,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:06:12,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:06:12,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:12,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:06:12,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:06:12,660 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-10-31 22:06:12,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 102 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 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 22:06:12,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:12,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-10-31 22:06:12,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:12,803 INFO L124 PetriNetUnfolderBase]: 127/258 cut-off events. [2024-10-31 22:06:12,804 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-10-31 22:06:12,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 258 events. 127/258 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 909 event pairs, 100 based on Foata normal form. 1/217 useless extension candidates. Maximal degree in co-relation 476. Up to 222 conditions per place. [2024-10-31 22:06:12,806 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 23 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2024-10-31 22:06:12,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 32 transitions, 158 flow [2024-10-31 22:06:12,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:06:12,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:06:12,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-10-31 22:06:12,809 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42162162162162165 [2024-10-31 22:06:12,810 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 102 flow. Second operand 5 states and 78 transitions. [2024-10-31 22:06:12,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 32 transitions, 158 flow [2024-10-31 22:06:12,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 138 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-10-31 22:06:12,812 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 84 flow [2024-10-31 22:06:12,812 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2024-10-31 22:06:12,813 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2024-10-31 22:06:12,813 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 84 flow [2024-10-31 22:06:12,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 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 22:06:12,813 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:12,814 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:12,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:06:13,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:13,020 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:06:13,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:13,021 INFO L85 PathProgramCache]: Analyzing trace with hash -318318797, now seen corresponding path program 2 times [2024-10-31 22:06:13,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:13,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685730816] [2024-10-31 22:06:13,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:13,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 22:06:13,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:13,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685730816] [2024-10-31 22:06:13,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685730816] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:06:13,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229376390] [2024-10-31 22:06:13,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:06:13,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:13,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:06:13,389 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:06:13,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:06:13,498 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-31 22:06:13,498 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:06:13,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 22:06:13,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:06:13,516 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 8 treesize of output 1 [2024-10-31 22:06:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:06:13,670 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:06:13,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229376390] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:13,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:06:13,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2024-10-31 22:06:13,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639098902] [2024-10-31 22:06:13,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:13,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:06:13,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:13,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:06:13,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:06:13,710 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-10-31 22:06:13,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 22:06:13,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:13,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-10-31 22:06:13,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:13,892 INFO L124 PetriNetUnfolderBase]: 253/485 cut-off events. [2024-10-31 22:06:13,893 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 22:06:13,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 485 events. 253/485 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2077 event pairs, 118 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 930. Up to 254 conditions per place. [2024-10-31 22:06:13,896 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 39 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-10-31 22:06:13,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 47 transitions, 207 flow [2024-10-31 22:06:13,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:06:13,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:06:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-10-31 22:06:13,898 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4702702702702703 [2024-10-31 22:06:13,899 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 84 flow. Second operand 5 states and 87 transitions. [2024-10-31 22:06:13,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 47 transitions, 207 flow [2024-10-31 22:06:13,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 47 transitions, 199 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:06:13,901 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 92 flow [2024-10-31 22:06:13,901 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2024-10-31 22:06:13,902 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2024-10-31 22:06:13,902 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 92 flow [2024-10-31 22:06:13,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 22:06:13,903 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:13,903 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:13,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:06:14,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:14,107 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:06:14,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:14,108 INFO L85 PathProgramCache]: Analyzing trace with hash -318318798, now seen corresponding path program 1 times [2024-10-31 22:06:14,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:14,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983932025] [2024-10-31 22:06:14,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:14,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:06:14,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:14,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983932025] [2024-10-31 22:06:14,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983932025] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:14,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:14,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:06:14,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103441388] [2024-10-31 22:06:14,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:14,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:06:14,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:14,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:06:14,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:06:14,211 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-10-31 22:06:14,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 22:06:14,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:14,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-10-31 22:06:14,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:14,356 INFO L124 PetriNetUnfolderBase]: 233/441 cut-off events. [2024-10-31 22:06:14,356 INFO L125 PetriNetUnfolderBase]: For 67/73 co-relation queries the response was YES. [2024-10-31 22:06:14,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 941 conditions, 441 events. 233/441 cut-off events. For 67/73 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1722 event pairs, 195 based on Foata normal form. 28/417 useless extension candidates. Maximal degree in co-relation 910. Up to 404 conditions per place. [2024-10-31 22:06:14,360 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 24 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2024-10-31 22:06:14,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 29 transitions, 140 flow [2024-10-31 22:06:14,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:06:14,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:06:14,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 53 transitions. [2024-10-31 22:06:14,363 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3581081081081081 [2024-10-31 22:06:14,363 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 92 flow. Second operand 4 states and 53 transitions. [2024-10-31 22:06:14,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 29 transitions, 140 flow [2024-10-31 22:06:14,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 29 transitions, 134 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:06:14,366 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 86 flow [2024-10-31 22:06:14,366 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2024-10-31 22:06:14,368 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2024-10-31 22:06:14,368 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 86 flow [2024-10-31 22:06:14,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 22:06:14,369 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:14,369 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:14,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:06:14,369 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:06:14,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:14,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1802868794, now seen corresponding path program 1 times [2024-10-31 22:06:14,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:14,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317572479] [2024-10-31 22:06:14,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:14,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:14,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 22:06:14,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:14,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317572479] [2024-10-31 22:06:14,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317572479] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:06:14,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047203113] [2024-10-31 22:06:14,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:14,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:14,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:06:14,694 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:06:14,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:06:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:14,800 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-31 22:06:14,802 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:06:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:14,937 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:06:15,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-10-31 22:06:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:15,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047203113] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:06:15,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:06:15,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 13 [2024-10-31 22:06:15,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626662247] [2024-10-31 22:06:15,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:06:15,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 22:06:15,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:15,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 22:06:15,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:06:15,351 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-10-31 22:06:15,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 86 flow. Second operand has 15 states, 15 states have (on average 11.266666666666667) internal successors, (169), 15 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:06:15,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:15,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-10-31 22:06:15,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:15,900 INFO L124 PetriNetUnfolderBase]: 618/1080 cut-off events. [2024-10-31 22:06:15,901 INFO L125 PetriNetUnfolderBase]: For 128/156 co-relation queries the response was YES. [2024-10-31 22:06:15,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2289 conditions, 1080 events. 618/1080 cut-off events. For 128/156 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4614 event pairs, 228 based on Foata normal form. 0/912 useless extension candidates. Maximal degree in co-relation 2258. Up to 463 conditions per place. [2024-10-31 22:06:15,909 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 54 selfloop transitions, 7 changer transitions 0/63 dead transitions. [2024-10-31 22:06:15,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 63 transitions, 296 flow [2024-10-31 22:06:15,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:06:15,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:06:15,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-10-31 22:06:15,911 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44594594594594594 [2024-10-31 22:06:15,911 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 86 flow. Second operand 8 states and 132 transitions. [2024-10-31 22:06:15,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 63 transitions, 296 flow [2024-10-31 22:06:15,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 63 transitions, 293 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:06:15,917 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 111 flow [2024-10-31 22:06:15,917 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=111, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2024-10-31 22:06:15,918 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 7 predicate places. [2024-10-31 22:06:15,918 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 111 flow [2024-10-31 22:06:15,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.266666666666667) internal successors, (169), 15 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:06:15,919 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:15,919 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:15,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:06:16,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:16,120 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:06:16,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:16,120 INFO L85 PathProgramCache]: Analyzing trace with hash 253200361, now seen corresponding path program 1 times [2024-10-31 22:06:16,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:16,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060474938] [2024-10-31 22:06:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:16,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 22:06:16,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:16,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060474938] [2024-10-31 22:06:16,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060474938] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:06:16,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721575867] [2024-10-31 22:06:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:16,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:16,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:06:16,437 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:06:16,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:06:16,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:16,537 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 22:06:16,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:06:16,550 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 8 treesize of output 1 [2024-10-31 22:06:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:16,695 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:06:16,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:16,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721575867] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:06:16,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:06:16,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 17 [2024-10-31 22:06:16,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836437076] [2024-10-31 22:06:16,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:06:16,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-31 22:06:16,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:16,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-31 22:06:16,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2024-10-31 22:06:17,179 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-10-31 22:06:17,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 111 flow. Second operand has 19 states, 19 states have (on average 10.157894736842104) internal successors, (193), 19 states have internal predecessors, (193), 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 22:06:17,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:17,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-10-31 22:06:17,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:18,092 INFO L124 PetriNetUnfolderBase]: 1165/2025 cut-off events. [2024-10-31 22:06:18,092 INFO L125 PetriNetUnfolderBase]: For 403/403 co-relation queries the response was YES. [2024-10-31 22:06:18,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4577 conditions, 2025 events. 1165/2025 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 10106 event pairs, 318 based on Foata normal form. 0/1711 useless extension candidates. Maximal degree in co-relation 4541. Up to 628 conditions per place. [2024-10-31 22:06:18,108 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 79 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2024-10-31 22:06:18,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 89 transitions, 454 flow [2024-10-31 22:06:18,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:06:18,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:06:18,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-10-31 22:06:18,110 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4594594594594595 [2024-10-31 22:06:18,110 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 111 flow. Second operand 9 states and 153 transitions. [2024-10-31 22:06:18,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 89 transitions, 454 flow [2024-10-31 22:06:18,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 89 transitions, 447 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:06:18,114 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 138 flow [2024-10-31 22:06:18,115 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=138, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2024-10-31 22:06:18,116 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 13 predicate places. [2024-10-31 22:06:18,116 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 138 flow [2024-10-31 22:06:18,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.157894736842104) internal successors, (193), 19 states have internal predecessors, (193), 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 22:06:18,117 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:18,117 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:18,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:06:18,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:18,321 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:06:18,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:18,321 INFO L85 PathProgramCache]: Analyzing trace with hash -301607642, now seen corresponding path program 1 times [2024-10-31 22:06:18,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:18,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56301145] [2024-10-31 22:06:18,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:18,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-31 22:06:18,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:18,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56301145] [2024-10-31 22:06:18,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56301145] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:06:18,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999822257] [2024-10-31 22:06:18,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:18,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:18,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:06:18,693 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:06:18,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:06:18,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:18,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-31 22:06:18,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:06:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:19,041 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:06:19,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-10-31 22:06:19,406 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:06:19,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999822257] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:06:19,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:06:19,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 20 [2024-10-31 22:06:19,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306043020] [2024-10-31 22:06:19,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:06:19,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-31 22:06:19,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:19,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-31 22:06:19,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2024-10-31 22:06:19,852 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-10-31 22:06:19,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 138 flow. Second operand has 22 states, 22 states have (on average 11.454545454545455) internal successors, (252), 22 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:06:19,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:19,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-10-31 22:06:19,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:20,948 INFO L124 PetriNetUnfolderBase]: 1517/2633 cut-off events. [2024-10-31 22:06:20,948 INFO L125 PetriNetUnfolderBase]: For 1321/1359 co-relation queries the response was YES. [2024-10-31 22:06:20,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6273 conditions, 2633 events. 1517/2633 cut-off events. For 1321/1359 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 13157 event pairs, 450 based on Foata normal form. 46/2311 useless extension candidates. Maximal degree in co-relation 6234. Up to 885 conditions per place. [2024-10-31 22:06:20,968 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 77 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2024-10-31 22:06:20,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 87 transitions, 500 flow [2024-10-31 22:06:20,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:06:20,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:06:20,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-10-31 22:06:20,970 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46546546546546547 [2024-10-31 22:06:20,970 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 138 flow. Second operand 9 states and 155 transitions. [2024-10-31 22:06:20,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 87 transitions, 500 flow [2024-10-31 22:06:20,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 87 transitions, 469 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-10-31 22:06:20,977 INFO L231 Difference]: Finished difference. Result has 53 places, 34 transitions, 151 flow [2024-10-31 22:06:20,978 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=151, PETRI_PLACES=53, PETRI_TRANSITIONS=34} [2024-10-31 22:06:20,979 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 17 predicate places. [2024-10-31 22:06:20,980 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 34 transitions, 151 flow [2024-10-31 22:06:20,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 11.454545454545455) internal successors, (252), 22 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:06:20,981 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:20,981 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2024-10-31 22:06:21,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:06:21,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 22:06:21,186 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:06:21,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:21,187 INFO L85 PathProgramCache]: Analyzing trace with hash 2111202217, now seen corresponding path program 2 times [2024-10-31 22:06:21,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:21,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892643557] [2024-10-31 22:06:21,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:21,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:06:21,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:21,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892643557] [2024-10-31 22:06:21,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892643557] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:06:21,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816953446] [2024-10-31 22:06:21,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:06:21,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:21,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:06:21,374 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:06:21,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:06:21,480 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:06:21,480 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:06:21,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 22:06:21,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:06:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:06:21,511 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:06:21,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816953446] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:21,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:06:21,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2024-10-31 22:06:21,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103751401] [2024-10-31 22:06:21,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:21,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:06:21,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:21,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:06:21,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:06:21,520 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-10-31 22:06:21,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 34 transitions, 151 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 22:06:21,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:21,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-10-31 22:06:21,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:22,105 INFO L124 PetriNetUnfolderBase]: 1341/2363 cut-off events. [2024-10-31 22:06:22,105 INFO L125 PetriNetUnfolderBase]: For 1299/1339 co-relation queries the response was YES. [2024-10-31 22:06:22,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5640 conditions, 2363 events. 1341/2363 cut-off events. For 1299/1339 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 12305 event pairs, 20 based on Foata normal form. 0/2055 useless extension candidates. Maximal degree in co-relation 5599. Up to 595 conditions per place. [2024-10-31 22:06:22,122 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 94 selfloop transitions, 4 changer transitions 0/100 dead transitions. [2024-10-31 22:06:22,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 100 transitions, 583 flow [2024-10-31 22:06:22,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:06:22,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:06:22,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-10-31 22:06:22,124 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6396396396396397 [2024-10-31 22:06:22,125 INFO L175 Difference]: Start difference. First operand has 53 places, 34 transitions, 151 flow. Second operand 6 states and 142 transitions. [2024-10-31 22:06:22,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 100 transitions, 583 flow [2024-10-31 22:06:22,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 100 transitions, 526 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-10-31 22:06:22,131 INFO L231 Difference]: Finished difference. Result has 47 places, 32 transitions, 123 flow [2024-10-31 22:06:22,131 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=123, PETRI_PLACES=47, PETRI_TRANSITIONS=32} [2024-10-31 22:06:22,132 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2024-10-31 22:06:22,132 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 32 transitions, 123 flow [2024-10-31 22:06:22,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 22:06:22,133 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:22,133 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:22,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-31 22:06:22,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-31 22:06:22,334 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:06:22,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:22,335 INFO L85 PathProgramCache]: Analyzing trace with hash 159171789, now seen corresponding path program 1 times [2024-10-31 22:06:22,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:22,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047910143] [2024-10-31 22:06:22,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:22,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:22,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:06:22,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:22,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047910143] [2024-10-31 22:06:22,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047910143] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:22,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:22,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:06:22,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557393647] [2024-10-31 22:06:22,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:22,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:06:22,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:22,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:06:22,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:06:22,775 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-10-31 22:06:22,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 32 transitions, 123 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 22:06:22,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:22,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-10-31 22:06:22,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:23,301 INFO L124 PetriNetUnfolderBase]: 1343/2417 cut-off events. [2024-10-31 22:06:23,301 INFO L125 PetriNetUnfolderBase]: For 1125/1125 co-relation queries the response was YES. [2024-10-31 22:06:23,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5781 conditions, 2417 events. 1343/2417 cut-off events. For 1125/1125 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 12505 event pairs, 987 based on Foata normal form. 3/2244 useless extension candidates. Maximal degree in co-relation 5747. Up to 1808 conditions per place. [2024-10-31 22:06:23,318 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 52 selfloop transitions, 3 changer transitions 7/64 dead transitions. [2024-10-31 22:06:23,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 64 transitions, 350 flow [2024-10-31 22:06:23,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:06:23,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:06:23,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-10-31 22:06:23,320 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5621621621621622 [2024-10-31 22:06:23,320 INFO L175 Difference]: Start difference. First operand has 47 places, 32 transitions, 123 flow. Second operand 5 states and 104 transitions. [2024-10-31 22:06:23,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 64 transitions, 350 flow [2024-10-31 22:06:23,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 64 transitions, 329 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:06:23,324 INFO L231 Difference]: Finished difference. Result has 50 places, 33 transitions, 136 flow [2024-10-31 22:06:23,324 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=50, PETRI_TRANSITIONS=33} [2024-10-31 22:06:23,325 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 14 predicate places. [2024-10-31 22:06:23,325 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 33 transitions, 136 flow [2024-10-31 22:06:23,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 22:06:23,326 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:23,326 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:23,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 22:06:23,326 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:06:23,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:23,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1027608845, now seen corresponding path program 2 times [2024-10-31 22:06:23,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:23,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965768525] [2024-10-31 22:06:23,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:23,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:06:23,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:23,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965768525] [2024-10-31 22:06:23,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965768525] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:23,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:23,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:06:23,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065420235] [2024-10-31 22:06:23,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:23,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:06:23,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:23,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:06:23,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:06:23,720 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-10-31 22:06:23,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 33 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 22:06:23,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:23,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-10-31 22:06:23,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:24,254 INFO L124 PetriNetUnfolderBase]: 1344/2410 cut-off events. [2024-10-31 22:06:24,254 INFO L125 PetriNetUnfolderBase]: For 1600/1609 co-relation queries the response was YES. [2024-10-31 22:06:24,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6162 conditions, 2410 events. 1344/2410 cut-off events. For 1600/1609 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 12859 event pairs, 966 based on Foata normal form. 1/2235 useless extension candidates. Maximal degree in co-relation 6125. Up to 1751 conditions per place. [2024-10-31 22:06:24,270 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 58 selfloop transitions, 3 changer transitions 9/72 dead transitions. [2024-10-31 22:06:24,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 72 transitions, 430 flow [2024-10-31 22:06:24,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:06:24,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:06:24,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-10-31 22:06:24,272 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5783783783783784 [2024-10-31 22:06:24,272 INFO L175 Difference]: Start difference. First operand has 50 places, 33 transitions, 136 flow. Second operand 5 states and 107 transitions. [2024-10-31 22:06:24,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 72 transitions, 430 flow [2024-10-31 22:06:24,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 410 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-10-31 22:06:24,278 INFO L231 Difference]: Finished difference. Result has 53 places, 34 transitions, 148 flow [2024-10-31 22:06:24,278 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=53, PETRI_TRANSITIONS=34} [2024-10-31 22:06:24,279 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 17 predicate places. [2024-10-31 22:06:24,280 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 34 transitions, 148 flow [2024-10-31 22:06:24,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 22:06:24,280 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:24,280 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:24,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 22:06:24,280 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:06:24,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:24,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1568482809, now seen corresponding path program 3 times [2024-10-31 22:06:24,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:24,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884949450] [2024-10-31 22:06:24,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:24,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:24,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:06:24,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:24,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884949450] [2024-10-31 22:06:24,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884949450] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:24,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:24,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:06:24,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114024054] [2024-10-31 22:06:24,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:24,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:06:24,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:24,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:06:24,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:06:24,660 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-10-31 22:06:24,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 34 transitions, 148 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 22:06:24,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:24,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-10-31 22:06:24,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:25,252 INFO L124 PetriNetUnfolderBase]: 1441/2581 cut-off events. [2024-10-31 22:06:25,253 INFO L125 PetriNetUnfolderBase]: For 1867/1867 co-relation queries the response was YES. [2024-10-31 22:06:25,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7052 conditions, 2581 events. 1441/2581 cut-off events. For 1867/1867 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 13560 event pairs, 993 based on Foata normal form. 3/2584 useless extension candidates. Maximal degree in co-relation 7013. Up to 1839 conditions per place. [2024-10-31 22:06:25,269 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 56 selfloop transitions, 10 changer transitions 5/73 dead transitions. [2024-10-31 22:06:25,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 445 flow [2024-10-31 22:06:25,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:06:25,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:06:25,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-10-31 22:06:25,271 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5945945945945946 [2024-10-31 22:06:25,271 INFO L175 Difference]: Start difference. First operand has 53 places, 34 transitions, 148 flow. Second operand 5 states and 110 transitions. [2024-10-31 22:06:25,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 445 flow [2024-10-31 22:06:25,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 73 transitions, 421 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-10-31 22:06:25,277 INFO L231 Difference]: Finished difference. Result has 56 places, 42 transitions, 235 flow [2024-10-31 22:06:25,278 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=56, PETRI_TRANSITIONS=42} [2024-10-31 22:06:25,278 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 20 predicate places. [2024-10-31 22:06:25,278 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 42 transitions, 235 flow [2024-10-31 22:06:25,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 22:06:25,279 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:25,279 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:25,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-31 22:06:25,279 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:06:25,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:25,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1703738957, now seen corresponding path program 4 times [2024-10-31 22:06:25,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:25,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533577861] [2024-10-31 22:06:25,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:25,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:06:25,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:25,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533577861] [2024-10-31 22:06:25,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533577861] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:25,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:25,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:06:25,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318290157] [2024-10-31 22:06:25,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:25,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:06:25,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:25,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:06:25,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:06:25,604 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-10-31 22:06:25,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 42 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 22:06:25,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:25,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-10-31 22:06:25,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:26,296 INFO L124 PetriNetUnfolderBase]: 1455/2603 cut-off events. [2024-10-31 22:06:26,296 INFO L125 PetriNetUnfolderBase]: For 3210/3210 co-relation queries the response was YES. [2024-10-31 22:06:26,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7760 conditions, 2603 events. 1455/2603 cut-off events. For 3210/3210 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 13958 event pairs, 976 based on Foata normal form. 3/2606 useless extension candidates. Maximal degree in co-relation 7719. Up to 1835 conditions per place. [2024-10-31 22:06:26,318 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 62 selfloop transitions, 11 changer transitions 5/80 dead transitions. [2024-10-31 22:06:26,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 80 transitions, 562 flow [2024-10-31 22:06:26,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:06:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:06:26,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-10-31 22:06:26,320 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-10-31 22:06:26,320 INFO L175 Difference]: Start difference. First operand has 56 places, 42 transitions, 235 flow. Second operand 5 states and 111 transitions. [2024-10-31 22:06:26,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 80 transitions, 562 flow [2024-10-31 22:06:26,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 80 transitions, 556 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:06:26,327 INFO L231 Difference]: Finished difference. Result has 62 places, 48 transitions, 332 flow [2024-10-31 22:06:26,327 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=62, PETRI_TRANSITIONS=48} [2024-10-31 22:06:26,328 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 26 predicate places. [2024-10-31 22:06:26,328 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 48 transitions, 332 flow [2024-10-31 22:06:26,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 22:06:26,328 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:26,329 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:26,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-31 22:06:26,329 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:06:26,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:26,330 INFO L85 PathProgramCache]: Analyzing trace with hash -120978433, now seen corresponding path program 2 times [2024-10-31 22:06:26,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:26,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854668404] [2024-10-31 22:06:26,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:26,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:26,450 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:06:26,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:26,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854668404] [2024-10-31 22:06:26,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854668404] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:06:26,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824213704] [2024-10-31 22:06:26,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:06:26,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:26,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:06:26,453 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:06:26,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:06:26,565 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:06:26,566 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:06:26,567 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-31 22:06:26,569 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:06:26,598 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:06:26,598 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:06:26,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824213704] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:26,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:06:26,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2024-10-31 22:06:26,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261222544] [2024-10-31 22:06:26,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:26,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:06:26,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:26,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:06:26,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:06:26,608 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-10-31 22:06:26,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 48 transitions, 332 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 22:06:26,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:26,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-10-31 22:06:26,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:27,224 INFO L124 PetriNetUnfolderBase]: 1349/2410 cut-off events. [2024-10-31 22:06:27,224 INFO L125 PetriNetUnfolderBase]: For 4245/4245 co-relation queries the response was YES. [2024-10-31 22:06:27,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7494 conditions, 2410 events. 1349/2410 cut-off events. For 4245/4245 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 12257 event pairs, 107 based on Foata normal form. 44/2454 useless extension candidates. Maximal degree in co-relation 7450. Up to 696 conditions per place. [2024-10-31 22:06:27,240 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 96 selfloop transitions, 7 changer transitions 1/105 dead transitions. [2024-10-31 22:06:27,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 105 transitions, 821 flow [2024-10-31 22:06:27,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:06:27,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:06:27,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-10-31 22:06:27,241 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6081081081081081 [2024-10-31 22:06:27,242 INFO L175 Difference]: Start difference. First operand has 62 places, 48 transitions, 332 flow. Second operand 6 states and 135 transitions. [2024-10-31 22:06:27,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 105 transitions, 821 flow [2024-10-31 22:06:27,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 105 transitions, 787 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-10-31 22:06:27,254 INFO L231 Difference]: Finished difference. Result has 62 places, 46 transitions, 308 flow [2024-10-31 22:06:27,254 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=62, PETRI_TRANSITIONS=46} [2024-10-31 22:06:27,255 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 26 predicate places. [2024-10-31 22:06:27,255 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 46 transitions, 308 flow [2024-10-31 22:06:27,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 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 22:06:27,255 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:27,256 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:27,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-31 22:06:27,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-31 22:06:27,457 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:06:27,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:27,457 INFO L85 PathProgramCache]: Analyzing trace with hash 853377515, now seen corresponding path program 1 times [2024-10-31 22:06:27,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:27,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935338917] [2024-10-31 22:06:27,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:27,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:06:27,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:27,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935338917] [2024-10-31 22:06:27,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935338917] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:06:27,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207632041] [2024-10-31 22:06:27,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:27,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:27,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:06:27,618 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:06:27,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 22:06:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:27,733 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:06:27,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:06:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:06:27,814 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:06:27,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:06:27,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207632041] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 22:06:27,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:06:27,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2024-10-31 22:06:27,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423294090] [2024-10-31 22:06:27,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:27,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:06:27,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:27,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:06:27,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:06:27,884 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-10-31 22:06:27,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 46 transitions, 308 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 22:06:27,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:27,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-10-31 22:06:27,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:28,471 INFO L124 PetriNetUnfolderBase]: 1487/2647 cut-off events. [2024-10-31 22:06:28,471 INFO L125 PetriNetUnfolderBase]: For 3933/3933 co-relation queries the response was YES. [2024-10-31 22:06:28,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8179 conditions, 2647 events. 1487/2647 cut-off events. For 3933/3933 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 14358 event pairs, 91 based on Foata normal form. 33/2680 useless extension candidates. Maximal degree in co-relation 8138. Up to 1450 conditions per place. [2024-10-31 22:06:28,489 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 72 selfloop transitions, 25 changer transitions 4/102 dead transitions. [2024-10-31 22:06:28,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 102 transitions, 817 flow [2024-10-31 22:06:28,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:06:28,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:06:28,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-10-31 22:06:28,491 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.528957528957529 [2024-10-31 22:06:28,491 INFO L175 Difference]: Start difference. First operand has 62 places, 46 transitions, 308 flow. Second operand 7 states and 137 transitions. [2024-10-31 22:06:28,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 102 transitions, 817 flow [2024-10-31 22:06:28,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 102 transitions, 788 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:06:28,501 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 521 flow [2024-10-31 22:06:28,501 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=521, PETRI_PLACES=68, PETRI_TRANSITIONS=63} [2024-10-31 22:06:28,503 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 32 predicate places. [2024-10-31 22:06:28,503 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 521 flow [2024-10-31 22:06:28,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 22:06:28,503 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:28,503 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:28,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-31 22:06:28,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-31 22:06:28,708 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:06:28,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:28,708 INFO L85 PathProgramCache]: Analyzing trace with hash 851063968, now seen corresponding path program 1 times [2024-10-31 22:06:28,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:28,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285577109] [2024-10-31 22:06:28,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:28,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:06:28,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:28,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285577109] [2024-10-31 22:06:28,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285577109] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:06:28,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107171215] [2024-10-31 22:06:28,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:28,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:28,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:06:28,962 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:06:28,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-31 22:06:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:29,181 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:06:29,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:06:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:06:29,251 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:06:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:06:29,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107171215] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 22:06:29,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:06:29,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2024-10-31 22:06:29,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905057922] [2024-10-31 22:06:29,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:29,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:06:29,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:29,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:06:29,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:06:29,328 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-10-31 22:06:29,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 63 transitions, 521 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 22:06:29,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:29,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-10-31 22:06:29,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:29,937 INFO L124 PetriNetUnfolderBase]: 1616/2866 cut-off events. [2024-10-31 22:06:29,937 INFO L125 PetriNetUnfolderBase]: For 7468/7468 co-relation queries the response was YES. [2024-10-31 22:06:29,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9847 conditions, 2866 events. 1616/2866 cut-off events. For 7468/7468 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 15222 event pairs, 209 based on Foata normal form. 30/2896 useless extension candidates. Maximal degree in co-relation 9802. Up to 1481 conditions per place. [2024-10-31 22:06:29,960 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 78 selfloop transitions, 38 changer transitions 4/121 dead transitions. [2024-10-31 22:06:29,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 121 transitions, 1151 flow [2024-10-31 22:06:29,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:06:29,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:06:29,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-10-31 22:06:29,961 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5173745173745173 [2024-10-31 22:06:29,961 INFO L175 Difference]: Start difference. First operand has 68 places, 63 transitions, 521 flow. Second operand 7 states and 134 transitions. [2024-10-31 22:06:29,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 121 transitions, 1151 flow [2024-10-31 22:06:29,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 121 transitions, 1119 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-10-31 22:06:29,985 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 823 flow [2024-10-31 22:06:29,986 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=823, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-10-31 22:06:29,986 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 42 predicate places. [2024-10-31 22:06:29,986 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 823 flow [2024-10-31 22:06:29,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 22:06:29,987 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:29,987 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:30,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-31 22:06:30,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-31 22:06:30,190 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:06:30,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:30,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1737492538, now seen corresponding path program 2 times [2024-10-31 22:06:30,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:30,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096559060] [2024-10-31 22:06:30,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:30,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:06:30,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:30,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096559060] [2024-10-31 22:06:30,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096559060] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:30,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:30,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:06:30,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745029325] [2024-10-31 22:06:30,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:30,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:06:30,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:30,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:06:30,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:06:30,359 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-10-31 22:06:30,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 823 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 22:06:30,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:30,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-10-31 22:06:30,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:31,118 INFO L124 PetriNetUnfolderBase]: 1618/2883 cut-off events. [2024-10-31 22:06:31,118 INFO L125 PetriNetUnfolderBase]: For 11744/11744 co-relation queries the response was YES. [2024-10-31 22:06:31,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10766 conditions, 2883 events. 1618/2883 cut-off events. For 11744/11744 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 15868 event pairs, 973 based on Foata normal form. 6/2889 useless extension candidates. Maximal degree in co-relation 10716. Up to 1951 conditions per place. [2024-10-31 22:06:31,144 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 96 selfloop transitions, 17 changer transitions 1/115 dead transitions. [2024-10-31 22:06:31,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 115 transitions, 1243 flow [2024-10-31 22:06:31,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:06:31,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:06:31,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-10-31 22:06:31,145 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5945945945945946 [2024-10-31 22:06:31,145 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 823 flow. Second operand 5 states and 110 transitions. [2024-10-31 22:06:31,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 115 transitions, 1243 flow [2024-10-31 22:06:31,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 115 transitions, 1211 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-10-31 22:06:31,184 INFO L231 Difference]: Finished difference. Result has 84 places, 83 transitions, 865 flow [2024-10-31 22:06:31,184 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=865, PETRI_PLACES=84, PETRI_TRANSITIONS=83} [2024-10-31 22:06:31,184 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 48 predicate places. [2024-10-31 22:06:31,185 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 83 transitions, 865 flow [2024-10-31 22:06:31,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 22:06:31,185 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:31,185 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:31,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-31 22:06:31,186 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:06:31,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:31,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2008416708, now seen corresponding path program 3 times [2024-10-31 22:06:31,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:31,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852060912] [2024-10-31 22:06:31,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:31,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:06:31,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:31,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852060912] [2024-10-31 22:06:31,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852060912] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:31,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:31,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:06:31,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087067402] [2024-10-31 22:06:31,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:31,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:06:31,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:31,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:06:31,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:06:31,366 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-10-31 22:06:31,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 865 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 22:06:31,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:31,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-10-31 22:06:31,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:32,082 INFO L124 PetriNetUnfolderBase]: 1738/3075 cut-off events. [2024-10-31 22:06:32,082 INFO L125 PetriNetUnfolderBase]: For 12831/12831 co-relation queries the response was YES. [2024-10-31 22:06:32,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11521 conditions, 3075 events. 1738/3075 cut-off events. For 12831/12831 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 17044 event pairs, 977 based on Foata normal form. 30/3105 useless extension candidates. Maximal degree in co-relation 11468. Up to 1957 conditions per place. [2024-10-31 22:06:32,105 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 89 selfloop transitions, 34 changer transitions 8/132 dead transitions. [2024-10-31 22:06:32,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 132 transitions, 1409 flow [2024-10-31 22:06:32,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:06:32,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:06:32,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-10-31 22:06:32,109 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6081081081081081 [2024-10-31 22:06:32,110 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 865 flow. Second operand 6 states and 135 transitions. [2024-10-31 22:06:32,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 132 transitions, 1409 flow [2024-10-31 22:06:32,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 132 transitions, 1376 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-10-31 22:06:32,157 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 1087 flow [2024-10-31 22:06:32,159 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1087, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2024-10-31 22:06:32,160 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 54 predicate places. [2024-10-31 22:06:32,160 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 1087 flow [2024-10-31 22:06:32,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 22:06:32,160 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:32,160 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:32,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-10-31 22:06:32,161 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:06:32,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:32,161 INFO L85 PathProgramCache]: Analyzing trace with hash 636749041, now seen corresponding path program 2 times [2024-10-31 22:06:32,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:32,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000662245] [2024-10-31 22:06:32,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:32,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:06:32,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:32,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000662245] [2024-10-31 22:06:32,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000662245] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:06:32,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760682629] [2024-10-31 22:06:32,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:06:32,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:32,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:06:32,286 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:06:32,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-31 22:06:32,399 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:06:32,399 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:06:32,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-31 22:06:32,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:06:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:06:32,503 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:06:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:06:32,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760682629] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:06:32,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:06:32,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-10-31 22:06:32,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698639911] [2024-10-31 22:06:32,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:06:32,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-31 22:06:32,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:32,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-31 22:06:32,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-10-31 22:06:32,610 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-10-31 22:06:32,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 1087 flow. Second operand has 10 states, 10 states have (on average 14.2) internal successors, (142), 10 states have internal predecessors, (142), 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 22:06:32,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:32,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-10-31 22:06:32,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:06:33,396 INFO L124 PetriNetUnfolderBase]: 2027/3570 cut-off events. [2024-10-31 22:06:33,396 INFO L125 PetriNetUnfolderBase]: For 17042/17042 co-relation queries the response was YES. [2024-10-31 22:06:33,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14039 conditions, 3570 events. 2027/3570 cut-off events. For 17042/17042 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 20123 event pairs, 313 based on Foata normal form. 33/3603 useless extension candidates. Maximal degree in co-relation 13983. Up to 1221 conditions per place. [2024-10-31 22:06:33,427 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 85 selfloop transitions, 87 changer transitions 10/183 dead transitions. [2024-10-31 22:06:33,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 183 transitions, 2022 flow [2024-10-31 22:06:33,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 22:06:33,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-31 22:06:33,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-10-31 22:06:33,429 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5356265356265356 [2024-10-31 22:06:33,429 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 1087 flow. Second operand 11 states and 218 transitions. [2024-10-31 22:06:33,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 183 transitions, 2022 flow [2024-10-31 22:06:33,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 183 transitions, 1976 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-10-31 22:06:33,501 INFO L231 Difference]: Finished difference. Result has 102 places, 123 transitions, 1712 flow [2024-10-31 22:06:33,501 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1032, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1712, PETRI_PLACES=102, PETRI_TRANSITIONS=123} [2024-10-31 22:06:33,502 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 66 predicate places. [2024-10-31 22:06:33,503 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 123 transitions, 1712 flow [2024-10-31 22:06:33,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.2) internal successors, (142), 10 states have internal predecessors, (142), 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 22:06:33,503 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:06:33,503 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:06:33,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-31 22:06:33,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc466c03-6a51-428a-883b-a826640bbebb/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:06:33,707 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-10-31 22:06:33,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:06:33,707 INFO L85 PathProgramCache]: Analyzing trace with hash 301963538, now seen corresponding path program 4 times [2024-10-31 22:06:33,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:06:33,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066326035] [2024-10-31 22:06:33,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:06:33,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:06:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:06:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-31 22:06:33,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:06:33,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066326035] [2024-10-31 22:06:33,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066326035] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:06:33,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:06:33,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:06:33,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537234181] [2024-10-31 22:06:33,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:06:33,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:06:33,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:06:33,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:06:33,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:06:33,835 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-10-31 22:06:33,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 123 transitions, 1712 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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 22:06:33,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:06:33,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-10-31 22:06:33,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand