./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC --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 632917bb2a5e88c193ba7761220e89039206b92cb89d98172ae8e9ad69d27ca8 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 00:40:34,729 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 00:40:34,796 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-24 00:40:34,803 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 00:40:34,805 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 00:40:34,860 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 00:40:34,863 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 00:40:34,863 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 00:40:34,864 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 00:40:34,864 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 00:40:34,865 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 00:40:34,865 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 00:40:34,866 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 00:40:34,866 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 00:40:34,867 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 00:40:34,868 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 00:40:34,868 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 00:40:34,868 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 00:40:34,868 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 00:40:34,868 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 00:40:34,868 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-24 00:40:34,869 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-24 00:40:34,869 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-24 00:40:34,869 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 00:40:34,869 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-24 00:40:34,869 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-24 00:40:34,869 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 00:40:34,869 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 00:40:34,870 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 00:40:34,870 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 00:40:34,870 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:40:34,870 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:40:34,870 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:40:34,870 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:40:34,870 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 00:40:34,870 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:40:34,871 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:40:34,871 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:40:34,871 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:40:34,871 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 00:40:34,872 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 00:40:34,872 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-24 00:40:34,872 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-24 00:40:34,872 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 00:40:34,873 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 00:40:34,873 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 00:40:34,873 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 00:40:34,873 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC 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 -> 632917bb2a5e88c193ba7761220e89039206b92cb89d98172ae8e9ad69d27ca8 [2024-11-24 00:40:35,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 00:40:35,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 00:40:35,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 00:40:35,255 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 00:40:35,258 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 00:40:35,259 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2024-11-24 00:40:38,907 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/data/2875cf1da/435d28ee8a704ad2b03a2d29ad6d2069/FLAG4244d3aa0 [2024-11-24 00:40:39,317 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 00:40:39,318 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2024-11-24 00:40:39,327 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/data/2875cf1da/435d28ee8a704ad2b03a2d29ad6d2069/FLAG4244d3aa0 [2024-11-24 00:40:39,345 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/data/2875cf1da/435d28ee8a704ad2b03a2d29ad6d2069 [2024-11-24 00:40:39,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 00:40:39,350 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 00:40:39,351 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 00:40:39,351 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 00:40:39,358 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 00:40:39,359 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:40:39" (1/1) ... [2024-11-24 00:40:39,360 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@556b143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:40:39, skipping insertion in model container [2024-11-24 00:40:39,361 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:40:39" (1/1) ... [2024-11-24 00:40:39,387 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 00:40:39,672 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 00:40:39,679 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:40:39,704 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 00:40:39,746 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:40:39,766 INFO L204 MainTranslator]: Completed translation [2024-11-24 00:40:39,767 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:40:39 WrapperNode [2024-11-24 00:40:39,767 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 00:40:39,769 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 00:40:39,769 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 00:40:39,769 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 00:40:39,777 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:40:39" (1/1) ... [2024-11-24 00:40:39,791 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:40:39" (1/1) ... [2024-11-24 00:40:39,846 INFO L138 Inliner]: procedures = 25, calls = 43, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 220 [2024-11-24 00:40:39,847 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 00:40:39,847 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 00:40:39,847 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 00:40:39,847 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 00:40:39,859 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:40:39" (1/1) ... [2024-11-24 00:40:39,861 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:40:39" (1/1) ... [2024-11-24 00:40:39,866 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:40:39" (1/1) ... [2024-11-24 00:40:39,913 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-24 00:40:39,914 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:40:39" (1/1) ... [2024-11-24 00:40:39,914 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:40:39" (1/1) ... [2024-11-24 00:40:39,934 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:40:39" (1/1) ... [2024-11-24 00:40:39,935 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:40:39" (1/1) ... [2024-11-24 00:40:39,944 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:40:39" (1/1) ... [2024-11-24 00:40:39,949 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:40:39" (1/1) ... [2024-11-24 00:40:39,950 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:40:39" (1/1) ... [2024-11-24 00:40:39,957 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 00:40:39,962 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 00:40:39,962 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 00:40:39,962 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 00:40:39,963 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:40:39" (1/1) ... [2024-11-24 00:40:39,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:40:39,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:40:40,019 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 00:40:40,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 00:40:40,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 00:40:40,065 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-24 00:40:40,065 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-24 00:40:40,065 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-24 00:40:40,065 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-24 00:40:40,066 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-24 00:40:40,066 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-24 00:40:40,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-24 00:40:40,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-24 00:40:40,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-24 00:40:40,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-24 00:40:40,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-24 00:40:40,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-24 00:40:40,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-24 00:40:40,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 00:40:40,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 00:40:40,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-24 00:40:40,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-24 00:40:40,069 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-24 00:40:40,219 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 00:40:40,222 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 00:40:41,158 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-24 00:40:41,158 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 00:40:41,912 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 00:40:41,912 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-24 00:40:41,913 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:40:41 BoogieIcfgContainer [2024-11-24 00:40:41,917 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 00:40:41,920 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 00:40:41,920 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 00:40:41,928 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 00:40:41,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 12:40:39" (1/3) ... [2024-11-24 00:40:41,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e6a80a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:40:41, skipping insertion in model container [2024-11-24 00:40:41,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:40:39" (2/3) ... [2024-11-24 00:40:41,932 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e6a80a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:40:41, skipping insertion in model container [2024-11-24 00:40:41,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:40:41" (3/3) ... [2024-11-24 00:40:41,934 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-three-array-min.wvr.c [2024-11-24 00:40:41,956 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 00:40:41,958 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-three-array-min.wvr.c that has 4 procedures, 81 locations, 1 initial locations, 6 loop locations, and 34 error locations. [2024-11-24 00:40:41,958 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-24 00:40:42,107 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-24 00:40:42,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 199 flow [2024-11-24 00:40:42,309 INFO L124 PetriNetUnfolderBase]: 9/86 cut-off events. [2024-11-24 00:40:42,313 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-24 00:40:42,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 86 events. 9/86 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 247 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2024-11-24 00:40:42,322 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 199 flow [2024-11-24 00:40:42,327 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 85 transitions, 188 flow [2024-11-24 00:40:42,341 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 00:40:42,359 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;@544325c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 00:40:42,359 INFO L334 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2024-11-24 00:40:42,364 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-24 00:40:42,364 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-24 00:40:42,365 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-24 00:40:42,365 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:40:42,366 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-24 00:40:42,366 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:40:42,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:40:42,380 INFO L85 PathProgramCache]: Analyzing trace with hash 909488, now seen corresponding path program 1 times [2024-11-24 00:40:42,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:40:42,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055258148] [2024-11-24 00:40:42,393 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:40:42,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:40:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:40:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:40:42,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:40:42,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055258148] [2024-11-24 00:40:42,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055258148] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:40:42,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:40:42,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-24 00:40:42,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27018302] [2024-11-24 00:40:42,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:40:42,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 00:40:42,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:40:42,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 00:40:42,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 00:40:42,967 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-24 00:40:42,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:40:42,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:40:42,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-24 00:40:42,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:40:44,399 INFO L124 PetriNetUnfolderBase]: 2958/4632 cut-off events. [2024-11-24 00:40:44,400 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-11-24 00:40:44,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8752 conditions, 4632 events. 2958/4632 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29707 event pairs, 2134 based on Foata normal form. 1/3242 useless extension candidates. Maximal degree in co-relation 8216. Up to 3883 conditions per place. [2024-11-24 00:40:44,481 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 46 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2024-11-24 00:40:44,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 270 flow [2024-11-24 00:40:44,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 00:40:44,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 00:40:44,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2024-11-24 00:40:44,505 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5842696629213483 [2024-11-24 00:40:44,508 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 188 flow. Second operand 3 states and 156 transitions. [2024-11-24 00:40:44,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 270 flow [2024-11-24 00:40:44,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 258 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-24 00:40:44,542 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 166 flow [2024-11-24 00:40:44,546 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-11-24 00:40:44,554 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, -11 predicate places. [2024-11-24 00:40:44,554 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 166 flow [2024-11-24 00:40:44,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:40:44,555 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:40:44,555 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-24 00:40:44,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-24 00:40:44,556 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:40:44,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:40:44,558 INFO L85 PathProgramCache]: Analyzing trace with hash 909489, now seen corresponding path program 1 times [2024-11-24 00:40:44,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:40:44,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91036324] [2024-11-24 00:40:44,559 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:40:44,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:40:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:40:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:40:45,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:40:45,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91036324] [2024-11-24 00:40:45,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91036324] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:40:45,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:40:45,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 00:40:45,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201910017] [2024-11-24 00:40:45,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:40:45,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:40:45,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:40:45,223 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:40:45,223 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:40:45,328 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-24 00:40:45,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:40:45,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:40:45,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-24 00:40:45,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:40:46,224 INFO L124 PetriNetUnfolderBase]: 2958/4634 cut-off events. [2024-11-24 00:40:46,224 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-24 00:40:46,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8613 conditions, 4634 events. 2958/4634 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29713 event pairs, 2134 based on Foata normal form. 0/3241 useless extension candidates. Maximal degree in co-relation 8578. Up to 3895 conditions per place. [2024-11-24 00:40:46,271 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 51 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2024-11-24 00:40:46,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 80 transitions, 276 flow [2024-11-24 00:40:46,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 00:40:46,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 00:40:46,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2024-11-24 00:40:46,277 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5880149812734082 [2024-11-24 00:40:46,277 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 166 flow. Second operand 3 states and 157 transitions. [2024-11-24 00:40:46,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 80 transitions, 276 flow [2024-11-24 00:40:46,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 80 transitions, 272 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 00:40:46,283 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 176 flow [2024-11-24 00:40:46,284 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-11-24 00:40:46,285 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, -10 predicate places. [2024-11-24 00:40:46,286 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 176 flow [2024-11-24 00:40:46,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:40:46,286 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:40:46,287 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-24 00:40:46,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-24 00:40:46,288 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:40:46,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:40:46,291 INFO L85 PathProgramCache]: Analyzing trace with hash 874048142, now seen corresponding path program 1 times [2024-11-24 00:40:46,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:40:46,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600899462] [2024-11-24 00:40:46,292 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:40:46,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:40:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:40:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:40:46,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:40:46,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600899462] [2024-11-24 00:40:46,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600899462] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:40:46,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888693506] [2024-11-24 00:40:46,859 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:40:46,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:40:46,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:40:46,864 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:40:46,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 00:40:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:40:46,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-24 00:40:46,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:40:47,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-24 00:40:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:40:47,524 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:40:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:40:47,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888693506] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:40:47,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:40:47,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-24 00:40:47,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916542805] [2024-11-24 00:40:47,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:40:47,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-24 00:40:47,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:40:47,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-24 00:40:47,767 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-24 00:40:48,385 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-24 00:40:48,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 176 flow. Second operand has 11 states, 11 states have (on average 35.36363636363637) internal successors, (389), 11 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:40:48,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:40:48,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-24 00:40:48,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:40:49,613 INFO L124 PetriNetUnfolderBase]: 2958/4633 cut-off events. [2024-11-24 00:40:49,613 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-24 00:40:49,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8615 conditions, 4633 events. 2958/4633 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29703 event pairs, 2134 based on Foata normal form. 0/3241 useless extension candidates. Maximal degree in co-relation 8602. Up to 3891 conditions per place. [2024-11-24 00:40:49,662 INFO L140 encePairwiseOnDemand]: 84/89 looper letters, 47 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2024-11-24 00:40:49,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 79 transitions, 278 flow [2024-11-24 00:40:49,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:40:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 00:40:49,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 223 transitions. [2024-11-24 00:40:49,668 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.501123595505618 [2024-11-24 00:40:49,668 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 176 flow. Second operand 5 states and 223 transitions. [2024-11-24 00:40:49,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 79 transitions, 278 flow [2024-11-24 00:40:49,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 79 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 00:40:49,673 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 188 flow [2024-11-24 00:40:49,674 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2024-11-24 00:40:49,674 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, -7 predicate places. [2024-11-24 00:40:49,675 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 188 flow [2024-11-24 00:40:49,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.36363636363637) internal successors, (389), 11 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:40:49,675 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:40:49,675 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-24 00:40:49,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-24 00:40:49,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:40:49,881 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:40:49,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:40:49,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1325691451, now seen corresponding path program 1 times [2024-11-24 00:40:49,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:40:49,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867036636] [2024-11-24 00:40:49,882 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:40:49,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:40:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:40:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:40:50,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:40:50,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867036636] [2024-11-24 00:40:50,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867036636] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:40:50,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484983941] [2024-11-24 00:40:50,335 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:40:50,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:40:50,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:40:50,338 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:40:50,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 00:40:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:40:50,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-24 00:40:50,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:40:50,475 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 [2024-11-24 00:40:50,655 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-24 00:40:50,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-24 00:40:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:40:50,712 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:40:50,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:40:50,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484983941] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 00:40:50,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:40:50,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 9 [2024-11-24 00:40:50,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563900266] [2024-11-24 00:40:50,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:40:50,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:40:50,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:40:50,842 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:40:50,843 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-24 00:40:51,029 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-24 00:40:51,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 35.2) internal successors, (176), 5 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:40:51,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:40:51,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-24 00:40:51,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:40:51,818 INFO L124 PetriNetUnfolderBase]: 2960/4639 cut-off events. [2024-11-24 00:40:51,818 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2024-11-24 00:40:51,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8635 conditions, 4639 events. 2960/4639 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29756 event pairs, 2134 based on Foata normal form. 0/3245 useless extension candidates. Maximal degree in co-relation 8606. Up to 3894 conditions per place. [2024-11-24 00:40:51,855 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 51 selfloop transitions, 7 changer transitions 0/85 dead transitions. [2024-11-24 00:40:51,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 85 transitions, 316 flow [2024-11-24 00:40:51,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:40:51,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 00:40:51,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 196 transitions. [2024-11-24 00:40:51,858 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.550561797752809 [2024-11-24 00:40:51,859 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 188 flow. Second operand 4 states and 196 transitions. [2024-11-24 00:40:51,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 85 transitions, 316 flow [2024-11-24 00:40:51,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 85 transitions, 306 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-24 00:40:51,864 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 225 flow [2024-11-24 00:40:51,864 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-11-24 00:40:51,866 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2024-11-24 00:40:51,866 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 225 flow [2024-11-24 00:40:51,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.2) internal successors, (176), 5 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:40:51,867 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:40:51,867 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:40:51,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-24 00:40:52,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:40:52,067 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:40:52,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:40:52,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1853236567, now seen corresponding path program 1 times [2024-11-24 00:40:52,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:40:52,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117094524] [2024-11-24 00:40:52,068 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:40:52,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:40:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:40:52,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:40:52,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:40:52,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117094524] [2024-11-24 00:40:52,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117094524] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:40:52,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:40:52,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 00:40:52,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813634481] [2024-11-24 00:40:52,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:40:52,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:40:52,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:40:52,221 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:40:52,221 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:40:52,259 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-24 00:40:52,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 225 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:40:52,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:40:52,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-24 00:40:52,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:40:53,096 INFO L124 PetriNetUnfolderBase]: 2958/4637 cut-off events. [2024-11-24 00:40:53,097 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-24 00:40:53,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8641 conditions, 4637 events. 2958/4637 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29804 event pairs, 2134 based on Foata normal form. 2/3251 useless extension candidates. Maximal degree in co-relation 8611. Up to 3891 conditions per place. [2024-11-24 00:40:53,132 INFO L140 encePairwiseOnDemand]: 82/89 looper letters, 48 selfloop transitions, 6 changer transitions 0/83 dead transitions. [2024-11-24 00:40:53,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 327 flow [2024-11-24 00:40:53,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:40:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 00:40:53,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 204 transitions. [2024-11-24 00:40:53,135 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5730337078651685 [2024-11-24 00:40:53,135 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 225 flow. Second operand 4 states and 204 transitions. [2024-11-24 00:40:53,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 327 flow [2024-11-24 00:40:53,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 83 transitions, 321 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 00:40:53,142 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 221 flow [2024-11-24 00:40:53,142 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=221, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2024-11-24 00:40:53,143 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, -4 predicate places. [2024-11-24 00:40:53,143 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 221 flow [2024-11-24 00:40:53,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:40:53,143 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:40:53,143 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-24 00:40:53,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-24 00:40:53,144 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:40:53,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:40:53,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1615772427, now seen corresponding path program 1 times [2024-11-24 00:40:53,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:40:53,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852323670] [2024-11-24 00:40:53,145 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:40:53,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:40:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:40:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:40:53,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:40:53,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852323670] [2024-11-24 00:40:53,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852323670] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:40:53,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060987062] [2024-11-24 00:40:53,304 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:40:53,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:40:53,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:40:53,309 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:40:53,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 00:40:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:40:53,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 00:40:53,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:40:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:40:53,517 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:40:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:40:53,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060987062] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:40:53,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:40:53,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-24 00:40:53,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717717514] [2024-11-24 00:40:53,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:40:53,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-24 00:40:53,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:40:53,607 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-24 00:40:53,607 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-24 00:40:53,767 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-24 00:40:53,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 221 flow. Second operand has 13 states, 13 states have (on average 38.53846153846154) internal successors, (501), 13 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:40:53,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:40:53,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-24 00:40:53,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:40:55,624 INFO L124 PetriNetUnfolderBase]: 5915/9273 cut-off events. [2024-11-24 00:40:55,625 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2024-11-24 00:40:55,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17276 conditions, 9273 events. 5915/9273 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 63286 event pairs, 4268 based on Foata normal form. 2/6508 useless extension candidates. Maximal degree in co-relation 8634. Up to 3889 conditions per place. [2024-11-24 00:40:55,695 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 85 selfloop transitions, 22 changer transitions 0/136 dead transitions. [2024-11-24 00:40:55,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 136 transitions, 592 flow [2024-11-24 00:40:55,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 00:40:55,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 00:40:55,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 405 transitions. [2024-11-24 00:40:55,700 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5688202247191011 [2024-11-24 00:40:55,701 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 221 flow. Second operand 8 states and 405 transitions. [2024-11-24 00:40:55,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 136 transitions, 592 flow [2024-11-24 00:40:55,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 136 transitions, 570 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-24 00:40:55,709 INFO L231 Difference]: Finished difference. Result has 88 places, 94 transitions, 338 flow [2024-11-24 00:40:55,713 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=338, PETRI_PLACES=88, PETRI_TRANSITIONS=94} [2024-11-24 00:40:55,714 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2024-11-24 00:40:55,714 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 94 transitions, 338 flow [2024-11-24 00:40:55,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 38.53846153846154) internal successors, (501), 13 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:40:55,715 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:40:55,715 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-24 00:40:55,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-24 00:40:55,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-24 00:40:55,916 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:40:55,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:40:55,917 INFO L85 PathProgramCache]: Analyzing trace with hash 256040248, now seen corresponding path program 2 times [2024-11-24 00:40:55,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:40:55,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043316097] [2024-11-24 00:40:55,917 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:40:55,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:40:55,967 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:40:55,967 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:40:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:40:56,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:40:56,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043316097] [2024-11-24 00:40:56,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043316097] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:40:56,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312036963] [2024-11-24 00:40:56,362 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:40:56,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:40:56,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:40:56,364 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:40:56,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 00:40:56,464 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:40:56,464 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:40:56,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-24 00:40:56,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:40:56,488 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 [2024-11-24 00:40:56,705 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-24 00:40:56,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-24 00:40:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:40:56,816 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:40:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:40:57,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312036963] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:40:57,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:40:57,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-24 00:40:57,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440388710] [2024-11-24 00:40:57,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:40:57,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-24 00:40:57,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:40:57,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-24 00:40:57,112 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-24 00:40:58,861 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-24 00:40:58,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 94 transitions, 338 flow. Second operand has 18 states, 18 states have (on average 35.666666666666664) internal successors, (642), 18 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:40:58,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:40:58,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-24 00:40:58,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:41:02,571 INFO L124 PetriNetUnfolderBase]: 8876/13921 cut-off events. [2024-11-24 00:41:02,571 INFO L125 PetriNetUnfolderBase]: For 173/173 co-relation queries the response was YES. [2024-11-24 00:41:02,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26017 conditions, 13921 events. 8876/13921 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 103165 event pairs, 6402 based on Foata normal form. 10/9783 useless extension candidates. Maximal degree in co-relation 17295. Up to 7776 conditions per place. [2024-11-24 00:41:02,818 INFO L140 encePairwiseOnDemand]: 77/89 looper letters, 96 selfloop transitions, 44 changer transitions 0/167 dead transitions. [2024-11-24 00:41:02,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 167 transitions, 923 flow [2024-11-24 00:41:02,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-24 00:41:02,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-24 00:41:02,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 660 transitions. [2024-11-24 00:41:02,822 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4943820224719101 [2024-11-24 00:41:02,823 INFO L175 Difference]: Start difference. First operand has 88 places, 94 transitions, 338 flow. Second operand 15 states and 660 transitions. [2024-11-24 00:41:02,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 167 transitions, 923 flow [2024-11-24 00:41:02,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 167 transitions, 885 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-11-24 00:41:02,829 INFO L231 Difference]: Finished difference. Result has 108 places, 119 transitions, 640 flow [2024-11-24 00:41:02,829 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=640, PETRI_PLACES=108, PETRI_TRANSITIONS=119} [2024-11-24 00:41:02,830 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 22 predicate places. [2024-11-24 00:41:02,830 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 119 transitions, 640 flow [2024-11-24 00:41:02,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 35.666666666666664) internal successors, (642), 18 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:02,831 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:41:02,831 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:41:02,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-24 00:41:03,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-24 00:41:03,036 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:41:03,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:41:03,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1776525134, now seen corresponding path program 1 times [2024-11-24 00:41:03,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:41:03,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029586267] [2024-11-24 00:41:03,037 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:41:03,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:41:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:41:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:41:03,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:41:03,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029586267] [2024-11-24 00:41:03,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029586267] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:41:03,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:41:03,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 00:41:03,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384813011] [2024-11-24 00:41:03,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:41:03,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:41:03,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:41:03,338 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:41:03,339 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:41:03,453 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 89 [2024-11-24 00:41:03,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 119 transitions, 640 flow. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:03,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:41:03,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 89 [2024-11-24 00:41:03,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:41:05,193 INFO L124 PetriNetUnfolderBase]: 8975/14419 cut-off events. [2024-11-24 00:41:05,193 INFO L125 PetriNetUnfolderBase]: For 234/234 co-relation queries the response was YES. [2024-11-24 00:41:05,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26776 conditions, 14419 events. 8975/14419 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 105986 event pairs, 6564 based on Foata normal form. 0/10261 useless extension candidates. Maximal degree in co-relation 26700. Up to 11812 conditions per place. [2024-11-24 00:41:05,288 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 80 selfloop transitions, 11 changer transitions 0/114 dead transitions. [2024-11-24 00:41:05,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 114 transitions, 812 flow [2024-11-24 00:41:05,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:41:05,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 00:41:05,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 194 transitions. [2024-11-24 00:41:05,290 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43595505617977526 [2024-11-24 00:41:05,290 INFO L175 Difference]: Start difference. First operand has 108 places, 119 transitions, 640 flow. Second operand 5 states and 194 transitions. [2024-11-24 00:41:05,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 114 transitions, 812 flow [2024-11-24 00:41:05,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 114 transitions, 761 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-11-24 00:41:05,297 INFO L231 Difference]: Finished difference. Result has 104 places, 114 transitions, 601 flow [2024-11-24 00:41:05,297 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=601, PETRI_PLACES=104, PETRI_TRANSITIONS=114} [2024-11-24 00:41:05,298 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2024-11-24 00:41:05,298 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 114 transitions, 601 flow [2024-11-24 00:41:05,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:05,299 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:41:05,299 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:41:05,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-24 00:41:05,299 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:41:05,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:41:05,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1776525133, now seen corresponding path program 1 times [2024-11-24 00:41:05,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:41:05,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13406933] [2024-11-24 00:41:05,300 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:41:05,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:41:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:41:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:41:05,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:41:05,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13406933] [2024-11-24 00:41:05,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13406933] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:41:05,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403793196] [2024-11-24 00:41:05,806 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:41:05,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:41:05,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:41:05,808 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:41:05,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 00:41:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:41:05,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-24 00:41:05,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:41:05,938 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 [2024-11-24 00:41:06,089 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 [2024-11-24 00:41:06,178 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 00:41:06,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-24 00:41:06,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-24 00:41:06,437 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-24 00:41:06,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2024-11-24 00:41:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:41:06,927 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:41:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:41:07,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403793196] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 00:41:07,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:41:07,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2024-11-24 00:41:07,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933580367] [2024-11-24 00:41:07,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:41:07,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:41:07,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:41:07,596 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:41:07,597 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-24 00:41:08,105 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-24 00:41:08,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 114 transitions, 601 flow. Second operand has 6 states, 6 states have (on average 35.833333333333336) internal successors, (215), 6 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:08,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:41:08,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-24 00:41:08,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:41:12,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:41:15,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:41:18,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.98s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:41:22,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.46s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-24 00:41:23,848 INFO L124 PetriNetUnfolderBase]: 7997/12541 cut-off events. [2024-11-24 00:41:23,848 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2024-11-24 00:41:23,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23545 conditions, 12541 events. 7997/12541 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 90440 event pairs, 5736 based on Foata normal form. 0/8926 useless extension candidates. Maximal degree in co-relation 23471. Up to 10504 conditions per place. [2024-11-24 00:41:23,913 INFO L140 encePairwiseOnDemand]: 83/89 looper letters, 77 selfloop transitions, 14 changer transitions 0/113 dead transitions. [2024-11-24 00:41:23,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 787 flow [2024-11-24 00:41:23,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 00:41:23,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-24 00:41:23,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 256 transitions. [2024-11-24 00:41:23,916 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4794007490636704 [2024-11-24 00:41:23,916 INFO L175 Difference]: Start difference. First operand has 104 places, 114 transitions, 601 flow. Second operand 6 states and 256 transitions. [2024-11-24 00:41:23,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 787 flow [2024-11-24 00:41:23,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 113 transitions, 772 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-24 00:41:23,922 INFO L231 Difference]: Finished difference. Result has 104 places, 112 transitions, 610 flow [2024-11-24 00:41:23,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=610, PETRI_PLACES=104, PETRI_TRANSITIONS=112} [2024-11-24 00:41:23,923 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2024-11-24 00:41:23,923 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 112 transitions, 610 flow [2024-11-24 00:41:23,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 35.833333333333336) internal successors, (215), 6 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:23,923 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:41:23,924 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:41:23,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-24 00:41:24,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-24 00:41:24,125 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:41:24,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:41:24,126 INFO L85 PathProgramCache]: Analyzing trace with hash 762296661, now seen corresponding path program 1 times [2024-11-24 00:41:24,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:41:24,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098857039] [2024-11-24 00:41:24,126 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:41:24,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:41:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:41:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 00:41:24,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:41:24,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098857039] [2024-11-24 00:41:24,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098857039] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:41:24,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:41:24,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:41:24,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809736155] [2024-11-24 00:41:24,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:41:24,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:41:24,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:41:24,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:41:24,302 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:41:24,435 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 89 [2024-11-24 00:41:24,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 112 transitions, 610 flow. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:24,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:41:24,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 89 [2024-11-24 00:41:24,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:41:26,449 INFO L124 PetriNetUnfolderBase]: 8132/12709 cut-off events. [2024-11-24 00:41:26,449 INFO L125 PetriNetUnfolderBase]: For 214/214 co-relation queries the response was YES. [2024-11-24 00:41:26,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23981 conditions, 12709 events. 8132/12709 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 88750 event pairs, 5934 based on Foata normal form. 0/9292 useless extension candidates. Maximal degree in co-relation 23907. Up to 10756 conditions per place. [2024-11-24 00:41:26,507 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 76 selfloop transitions, 13 changer transitions 0/107 dead transitions. [2024-11-24 00:41:26,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 107 transitions, 778 flow [2024-11-24 00:41:26,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:41:26,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 00:41:26,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 197 transitions. [2024-11-24 00:41:26,509 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44269662921348313 [2024-11-24 00:41:26,510 INFO L175 Difference]: Start difference. First operand has 104 places, 112 transitions, 610 flow. Second operand 5 states and 197 transitions. [2024-11-24 00:41:26,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 107 transitions, 778 flow [2024-11-24 00:41:26,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 107 transitions, 763 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-24 00:41:26,516 INFO L231 Difference]: Finished difference. Result has 100 places, 107 transitions, 611 flow [2024-11-24 00:41:26,516 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=611, PETRI_PLACES=100, PETRI_TRANSITIONS=107} [2024-11-24 00:41:26,517 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 14 predicate places. [2024-11-24 00:41:26,517 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 107 transitions, 611 flow [2024-11-24 00:41:26,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:26,518 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:41:26,518 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:41:26,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-24 00:41:26,518 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:41:26,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:41:26,519 INFO L85 PathProgramCache]: Analyzing trace with hash 762296662, now seen corresponding path program 1 times [2024-11-24 00:41:26,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:41:26,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528088947] [2024-11-24 00:41:26,519 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:41:26,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:41:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:41:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:41:26,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:41:26,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528088947] [2024-11-24 00:41:26,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528088947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:41:26,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800904587] [2024-11-24 00:41:26,815 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:41:26,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:41:26,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:41:26,818 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:41:26,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-24 00:41:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:41:26,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-24 00:41:26,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:41:26,952 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 [2024-11-24 00:41:27,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:41:27,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-24 00:41:27,051 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 00:41:27,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-24 00:41:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:41:27,099 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:41:27,219 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 52 treesize of output 48 [2024-11-24 00:41:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:41:27,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800904587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:41:27,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:41:27,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-24 00:41:27,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353196459] [2024-11-24 00:41:27,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:41:27,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-24 00:41:27,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:41:27,326 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-24 00:41:27,326 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-24 00:41:28,229 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 89 [2024-11-24 00:41:28,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 107 transitions, 611 flow. Second operand has 10 states, 10 states have (on average 34.5) internal successors, (345), 10 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:28,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:41:28,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 89 [2024-11-24 00:41:28,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:41:29,921 INFO L124 PetriNetUnfolderBase]: 7118/11161 cut-off events. [2024-11-24 00:41:29,921 INFO L125 PetriNetUnfolderBase]: For 215/215 co-relation queries the response was YES. [2024-11-24 00:41:29,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21011 conditions, 11161 events. 7118/11161 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 78722 event pairs, 5070 based on Foata normal form. 0/8092 useless extension candidates. Maximal degree in co-relation 20937. Up to 9352 conditions per place. [2024-11-24 00:41:30,168 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 67 selfloop transitions, 23 changer transitions 0/107 dead transitions. [2024-11-24 00:41:30,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 107 transitions, 803 flow [2024-11-24 00:41:30,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 00:41:30,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 00:41:30,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 310 transitions. [2024-11-24 00:41:30,171 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4353932584269663 [2024-11-24 00:41:30,171 INFO L175 Difference]: Start difference. First operand has 100 places, 107 transitions, 611 flow. Second operand 8 states and 310 transitions. [2024-11-24 00:41:30,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 107 transitions, 803 flow [2024-11-24 00:41:30,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 107 transitions, 784 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-24 00:41:30,178 INFO L231 Difference]: Finished difference. Result has 102 places, 105 transitions, 634 flow [2024-11-24 00:41:30,179 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=634, PETRI_PLACES=102, PETRI_TRANSITIONS=105} [2024-11-24 00:41:30,179 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 16 predicate places. [2024-11-24 00:41:30,180 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 105 transitions, 634 flow [2024-11-24 00:41:30,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.5) internal successors, (345), 10 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:30,180 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:41:30,180 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1] [2024-11-24 00:41:30,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-24 00:41:30,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-24 00:41:30,381 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:41:30,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:41:30,382 INFO L85 PathProgramCache]: Analyzing trace with hash -357129355, now seen corresponding path program 3 times [2024-11-24 00:41:30,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:41:30,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389458937] [2024-11-24 00:41:30,382 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:41:30,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:41:30,416 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 00:41:30,419 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:41:30,806 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:41:30,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:41:30,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389458937] [2024-11-24 00:41:30,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389458937] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:41:30,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312972371] [2024-11-24 00:41:30,807 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:41:30,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:41:30,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:41:30,810 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:41:30,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-24 00:41:30,929 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 00:41:30,930 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:41:30,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-24 00:41:30,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:41:31,019 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 [2024-11-24 00:41:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-24 00:41:31,252 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:41:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-24 00:41:31,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312972371] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:41:31,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:41:31,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2024-11-24 00:41:31,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366594888] [2024-11-24 00:41:31,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:41:31,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-24 00:41:31,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:41:31,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-24 00:41:31,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-11-24 00:41:32,982 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-24 00:41:32,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 105 transitions, 634 flow. Second operand has 15 states, 15 states have (on average 35.86666666666667) internal successors, (538), 15 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:32,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:41:32,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-24 00:41:32,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:41:35,369 INFO L124 PetriNetUnfolderBase]: 7118/11157 cut-off events. [2024-11-24 00:41:35,369 INFO L125 PetriNetUnfolderBase]: For 233/233 co-relation queries the response was YES. [2024-11-24 00:41:35,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21004 conditions, 11157 events. 7118/11157 cut-off events. For 233/233 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 78737 event pairs, 5070 based on Foata normal form. 4/8092 useless extension candidates. Maximal degree in co-relation 20954. Up to 9352 conditions per place. [2024-11-24 00:41:35,422 INFO L140 encePairwiseOnDemand]: 77/89 looper letters, 37 selfloop transitions, 53 changer transitions 0/105 dead transitions. [2024-11-24 00:41:35,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 105 transitions, 806 flow [2024-11-24 00:41:35,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 00:41:35,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 00:41:35,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 292 transitions. [2024-11-24 00:41:35,425 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46869983948635635 [2024-11-24 00:41:35,425 INFO L175 Difference]: Start difference. First operand has 102 places, 105 transitions, 634 flow. Second operand 7 states and 292 transitions. [2024-11-24 00:41:35,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 105 transitions, 806 flow [2024-11-24 00:41:35,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 105 transitions, 749 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-11-24 00:41:35,431 INFO L231 Difference]: Finished difference. Result has 98 places, 105 transitions, 675 flow [2024-11-24 00:41:35,432 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=675, PETRI_PLACES=98, PETRI_TRANSITIONS=105} [2024-11-24 00:41:35,433 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 12 predicate places. [2024-11-24 00:41:35,433 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 105 transitions, 675 flow [2024-11-24 00:41:35,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 35.86666666666667) internal successors, (538), 15 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:35,433 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:41:35,434 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:41:35,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-24 00:41:35,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:41:35,637 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:41:35,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:41:35,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1062165093, now seen corresponding path program 1 times [2024-11-24 00:41:35,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:41:35,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236643686] [2024-11-24 00:41:35,638 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:41:35,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:41:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:41:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:41:35,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:41:35,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236643686] [2024-11-24 00:41:35,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236643686] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:41:35,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698609856] [2024-11-24 00:41:35,793 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:41:35,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:41:35,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:41:35,796 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:41:35,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-24 00:41:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:41:35,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-24 00:41:35,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:41:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:41:36,018 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:41:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:41:36,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698609856] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:41:36,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:41:36,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-24 00:41:36,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997217036] [2024-11-24 00:41:36,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:41:36,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-24 00:41:36,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:41:36,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-24 00:41:36,117 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-24 00:41:36,353 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-24 00:41:36,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 105 transitions, 675 flow. Second operand has 12 states, 12 states have (on average 38.333333333333336) internal successors, (460), 12 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:36,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:41:36,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-24 00:41:36,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:41:37,392 INFO L124 PetriNetUnfolderBase]: 4452/7131 cut-off events. [2024-11-24 00:41:37,392 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2024-11-24 00:41:37,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13621 conditions, 7131 events. 4452/7131 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 46632 event pairs, 2874 based on Foata normal form. 0/5174 useless extension candidates. Maximal degree in co-relation 13400. Up to 3523 conditions per place. [2024-11-24 00:41:37,430 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 95 selfloop transitions, 44 changer transitions 0/153 dead transitions. [2024-11-24 00:41:37,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 153 transitions, 1057 flow [2024-11-24 00:41:37,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 00:41:37,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 00:41:37,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 440 transitions. [2024-11-24 00:41:37,433 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5493133583021224 [2024-11-24 00:41:37,433 INFO L175 Difference]: Start difference. First operand has 98 places, 105 transitions, 675 flow. Second operand 9 states and 440 transitions. [2024-11-24 00:41:37,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 153 transitions, 1057 flow [2024-11-24 00:41:37,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 153 transitions, 1044 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-24 00:41:37,437 INFO L231 Difference]: Finished difference. Result has 107 places, 107 transitions, 767 flow [2024-11-24 00:41:37,437 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=767, PETRI_PLACES=107, PETRI_TRANSITIONS=107} [2024-11-24 00:41:37,438 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 21 predicate places. [2024-11-24 00:41:37,438 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 107 transitions, 767 flow [2024-11-24 00:41:37,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 38.333333333333336) internal successors, (460), 12 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:37,439 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:41:37,439 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:41:37,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-24 00:41:37,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-24 00:41:37,640 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:41:37,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:41:37,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1387189167, now seen corresponding path program 1 times [2024-11-24 00:41:37,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:41:37,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538352375] [2024-11-24 00:41:37,641 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:41:37,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:41:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:41:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:41:37,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:41:37,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538352375] [2024-11-24 00:41:37,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538352375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:41:37,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68963788] [2024-11-24 00:41:37,882 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:41:37,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:41:37,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:41:37,885 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:41:37,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-24 00:41:38,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:41:38,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-24 00:41:38,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:41:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:41:38,127 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:41:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:41:38,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68963788] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:41:38,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:41:38,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-24 00:41:38,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100881364] [2024-11-24 00:41:38,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:41:38,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-24 00:41:38,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:41:38,249 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-24 00:41:38,249 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-24 00:41:38,405 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-24 00:41:38,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 107 transitions, 767 flow. Second operand has 12 states, 12 states have (on average 38.583333333333336) internal successors, (463), 12 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:38,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:41:38,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-24 00:41:38,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:41:39,131 INFO L124 PetriNetUnfolderBase]: 3253/5228 cut-off events. [2024-11-24 00:41:39,131 INFO L125 PetriNetUnfolderBase]: For 940/1066 co-relation queries the response was YES. [2024-11-24 00:41:39,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10700 conditions, 5228 events. 3253/5228 cut-off events. For 940/1066 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 31043 event pairs, 2212 based on Foata normal form. 0/3914 useless extension candidates. Maximal degree in co-relation 10457. Up to 3518 conditions per place. [2024-11-24 00:41:39,159 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 82 selfloop transitions, 44 changer transitions 0/140 dead transitions. [2024-11-24 00:41:39,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 140 transitions, 1101 flow [2024-11-24 00:41:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 00:41:39,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 00:41:39,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 427 transitions. [2024-11-24 00:41:39,162 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.533083645443196 [2024-11-24 00:41:39,162 INFO L175 Difference]: Start difference. First operand has 107 places, 107 transitions, 767 flow. Second operand 9 states and 427 transitions. [2024-11-24 00:41:39,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 140 transitions, 1101 flow [2024-11-24 00:41:39,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 140 transitions, 1020 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-24 00:41:39,173 INFO L231 Difference]: Finished difference. Result has 111 places, 109 transitions, 791 flow [2024-11-24 00:41:39,175 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=791, PETRI_PLACES=111, PETRI_TRANSITIONS=109} [2024-11-24 00:41:39,175 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 25 predicate places. [2024-11-24 00:41:39,176 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 109 transitions, 791 flow [2024-11-24 00:41:39,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 38.583333333333336) internal successors, (463), 12 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:39,176 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:41:39,176 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:41:39,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-24 00:41:39,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:41:39,377 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:41:39,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:41:39,377 INFO L85 PathProgramCache]: Analyzing trace with hash 511246116, now seen corresponding path program 1 times [2024-11-24 00:41:39,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:41:39,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127000039] [2024-11-24 00:41:39,378 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:41:39,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:41:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:41:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:41:39,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:41:39,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127000039] [2024-11-24 00:41:39,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127000039] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:41:39,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:41:39,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 00:41:39,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434512767] [2024-11-24 00:41:39,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:41:39,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:41:39,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:41:39,479 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:41:39,479 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:41:39,575 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-24 00:41:39,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 109 transitions, 791 flow. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:39,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:41:39,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-24 00:41:39,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:41:40,047 INFO L124 PetriNetUnfolderBase]: 2451/3882 cut-off events. [2024-11-24 00:41:40,048 INFO L125 PetriNetUnfolderBase]: For 1347/1433 co-relation queries the response was YES. [2024-11-24 00:41:40,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8832 conditions, 3882 events. 2451/3882 cut-off events. For 1347/1433 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 21951 event pairs, 1866 based on Foata normal form. 0/3093 useless extension candidates. Maximal degree in co-relation 8586. Up to 3352 conditions per place. [2024-11-24 00:41:40,068 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 84 selfloop transitions, 8 changer transitions 0/107 dead transitions. [2024-11-24 00:41:40,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 107 transitions, 971 flow [2024-11-24 00:41:40,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:41:40,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 00:41:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2024-11-24 00:41:40,069 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5112359550561798 [2024-11-24 00:41:40,070 INFO L175 Difference]: Start difference. First operand has 111 places, 109 transitions, 791 flow. Second operand 4 states and 182 transitions. [2024-11-24 00:41:40,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 107 transitions, 971 flow [2024-11-24 00:41:40,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 107 transitions, 890 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-24 00:41:40,079 INFO L231 Difference]: Finished difference. Result has 106 places, 107 transitions, 722 flow [2024-11-24 00:41:40,080 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=722, PETRI_PLACES=106, PETRI_TRANSITIONS=107} [2024-11-24 00:41:40,080 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 20 predicate places. [2024-11-24 00:41:40,080 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 107 transitions, 722 flow [2024-11-24 00:41:40,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:40,081 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:41:40,081 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:41:40,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-24 00:41:40,081 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:41:40,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:41:40,082 INFO L85 PathProgramCache]: Analyzing trace with hash 511246117, now seen corresponding path program 1 times [2024-11-24 00:41:40,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:41:40,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275592522] [2024-11-24 00:41:40,082 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:41:40,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:41:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:41:40,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:41:40,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:41:40,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275592522] [2024-11-24 00:41:40,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275592522] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:41:40,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217364731] [2024-11-24 00:41:40,312 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:41:40,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:41:40,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:41:40,315 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:41:40,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-24 00:41:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:41:40,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-24 00:41:40,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:41:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:41:40,549 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:41:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:41:40,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217364731] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:41:40,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:41:40,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-24 00:41:40,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929043441] [2024-11-24 00:41:40,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:41:40,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-24 00:41:40,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:41:40,647 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-24 00:41:40,647 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-24 00:41:40,774 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-24 00:41:40,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 107 transitions, 722 flow. Second operand has 12 states, 12 states have (on average 38.75) internal successors, (465), 12 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:40,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:41:40,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-24 00:41:40,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:41:41,457 INFO L124 PetriNetUnfolderBase]: 2335/3663 cut-off events. [2024-11-24 00:41:41,458 INFO L125 PetriNetUnfolderBase]: For 1081/1262 co-relation queries the response was YES. [2024-11-24 00:41:41,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8108 conditions, 3663 events. 2335/3663 cut-off events. For 1081/1262 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 20399 event pairs, 1329 based on Foata normal form. 0/2816 useless extension candidates. Maximal degree in co-relation 7883. Up to 2356 conditions per place. [2024-11-24 00:41:41,476 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 90 selfloop transitions, 44 changer transitions 0/148 dead transitions. [2024-11-24 00:41:41,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 148 transitions, 1106 flow [2024-11-24 00:41:41,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 00:41:41,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-24 00:41:41,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 471 transitions. [2024-11-24 00:41:41,480 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5292134831460674 [2024-11-24 00:41:41,480 INFO L175 Difference]: Start difference. First operand has 106 places, 107 transitions, 722 flow. Second operand 10 states and 471 transitions. [2024-11-24 00:41:41,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 148 transitions, 1106 flow [2024-11-24 00:41:41,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 148 transitions, 1097 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 00:41:41,487 INFO L231 Difference]: Finished difference. Result has 116 places, 109 transitions, 847 flow [2024-11-24 00:41:41,487 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=847, PETRI_PLACES=116, PETRI_TRANSITIONS=109} [2024-11-24 00:41:41,488 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 30 predicate places. [2024-11-24 00:41:41,488 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 109 transitions, 847 flow [2024-11-24 00:41:41,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 38.75) internal successors, (465), 12 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:41,488 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:41:41,489 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:41:41,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-24 00:41:41,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:41:41,689 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:41:41,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:41:41,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1186557003, now seen corresponding path program 2 times [2024-11-24 00:41:41,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:41:41,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611096296] [2024-11-24 00:41:41,690 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:41:41,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:41:41,720 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 00:41:41,720 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:41:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-24 00:41:42,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:41:42,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611096296] [2024-11-24 00:41:42,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611096296] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:41:42,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:41:42,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 00:41:42,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751685628] [2024-11-24 00:41:42,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:41:42,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-24 00:41:42,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:41:42,165 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-24 00:41:42,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-24 00:41:42,759 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 89 [2024-11-24 00:41:42,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 109 transitions, 847 flow. Second operand has 8 states, 8 states have (on average 32.25) internal successors, (258), 8 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:42,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:41:42,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 89 [2024-11-24 00:41:42,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:41:44,113 INFO L124 PetriNetUnfolderBase]: 4946/7807 cut-off events. [2024-11-24 00:41:44,113 INFO L125 PetriNetUnfolderBase]: For 1859/2093 co-relation queries the response was YES. [2024-11-24 00:41:44,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17566 conditions, 7807 events. 4946/7807 cut-off events. For 1859/2093 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 49123 event pairs, 2354 based on Foata normal form. 0/5702 useless extension candidates. Maximal degree in co-relation 17302. Up to 4215 conditions per place. [2024-11-24 00:41:44,181 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 136 selfloop transitions, 11 changer transitions 0/157 dead transitions. [2024-11-24 00:41:44,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 157 transitions, 1277 flow [2024-11-24 00:41:44,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 00:41:44,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 00:41:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 305 transitions. [2024-11-24 00:41:44,183 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4895666131621188 [2024-11-24 00:41:44,184 INFO L175 Difference]: Start difference. First operand has 116 places, 109 transitions, 847 flow. Second operand 7 states and 305 transitions. [2024-11-24 00:41:44,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 157 transitions, 1277 flow [2024-11-24 00:41:44,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 157 transitions, 1226 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-24 00:41:44,200 INFO L231 Difference]: Finished difference. Result has 119 places, 112 transitions, 845 flow [2024-11-24 00:41:44,200 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=845, PETRI_PLACES=119, PETRI_TRANSITIONS=112} [2024-11-24 00:41:44,201 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 33 predicate places. [2024-11-24 00:41:44,201 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 112 transitions, 845 flow [2024-11-24 00:41:44,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 32.25) internal successors, (258), 8 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:44,202 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:41:44,202 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:41:44,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-24 00:41:44,202 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:41:44,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:41:44,203 INFO L85 PathProgramCache]: Analyzing trace with hash 2105647945, now seen corresponding path program 2 times [2024-11-24 00:41:44,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:41:44,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569431784] [2024-11-24 00:41:44,204 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:41:44,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:41:44,249 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 00:41:44,249 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:41:44,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-24 00:41:44,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:41:44,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569431784] [2024-11-24 00:41:44,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569431784] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:41:44,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:41:44,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-24 00:41:44,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404845451] [2024-11-24 00:41:44,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:41:44,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-24 00:41:44,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:41:44,823 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-24 00:41:44,823 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-24 00:41:45,384 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 89 [2024-11-24 00:41:45,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 112 transitions, 845 flow. Second operand has 9 states, 9 states have (on average 27.22222222222222) internal successors, (245), 9 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:45,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:41:45,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 89 [2024-11-24 00:41:45,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:41:46,920 INFO L124 PetriNetUnfolderBase]: 7661/11075 cut-off events. [2024-11-24 00:41:46,920 INFO L125 PetriNetUnfolderBase]: For 4664/5156 co-relation queries the response was YES. [2024-11-24 00:41:46,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26649 conditions, 11075 events. 7661/11075 cut-off events. For 4664/5156 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 62426 event pairs, 3316 based on Foata normal form. 172/8424 useless extension candidates. Maximal degree in co-relation 26394. Up to 6302 conditions per place. [2024-11-24 00:41:47,007 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 133 selfloop transitions, 18 changer transitions 0/164 dead transitions. [2024-11-24 00:41:47,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 164 transitions, 1327 flow [2024-11-24 00:41:47,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 00:41:47,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 00:41:47,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 292 transitions. [2024-11-24 00:41:47,009 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4101123595505618 [2024-11-24 00:41:47,010 INFO L175 Difference]: Start difference. First operand has 119 places, 112 transitions, 845 flow. Second operand 8 states and 292 transitions. [2024-11-24 00:41:47,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 164 transitions, 1327 flow [2024-11-24 00:41:47,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 164 transitions, 1296 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-24 00:41:47,030 INFO L231 Difference]: Finished difference. Result has 124 places, 115 transitions, 887 flow [2024-11-24 00:41:47,030 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=887, PETRI_PLACES=124, PETRI_TRANSITIONS=115} [2024-11-24 00:41:47,031 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 38 predicate places. [2024-11-24 00:41:47,031 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 115 transitions, 887 flow [2024-11-24 00:41:47,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.22222222222222) internal successors, (245), 9 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:47,032 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:41:47,032 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:41:47,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-24 00:41:47,032 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:41:47,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:41:47,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2105647947, now seen corresponding path program 1 times [2024-11-24 00:41:47,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:41:47,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220189507] [2024-11-24 00:41:47,033 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:41:47,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:41:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:41:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:41:47,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:41:47,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220189507] [2024-11-24 00:41:47,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220189507] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:41:47,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108096021] [2024-11-24 00:41:47,508 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:41:47,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:41:47,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:41:47,511 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:41:47,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-24 00:41:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:41:47,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-24 00:41:47,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:41:47,698 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 [2024-11-24 00:41:47,708 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 [2024-11-24 00:41:47,809 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 00:41:47,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-24 00:41:47,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2024-11-24 00:41:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:41:48,566 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:41:49,134 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-24 00:41:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:41:49,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108096021] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 00:41:49,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:41:49,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 22 [2024-11-24 00:41:49,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979089117] [2024-11-24 00:41:49,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:41:49,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-24 00:41:49,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:41:49,147 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-24 00:41:49,147 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-11-24 00:41:49,614 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-24 00:41:49,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 115 transitions, 887 flow. Second operand has 8 states, 8 states have (on average 39.5) internal successors, (316), 8 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:49,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:41:49,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-24 00:41:49,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:41:51,177 INFO L124 PetriNetUnfolderBase]: 5250/7934 cut-off events. [2024-11-24 00:41:51,177 INFO L125 PetriNetUnfolderBase]: For 5426/6434 co-relation queries the response was YES. [2024-11-24 00:41:51,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20431 conditions, 7934 events. 5250/7934 cut-off events. For 5426/6434 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 47367 event pairs, 1921 based on Foata normal form. 285/6647 useless extension candidates. Maximal degree in co-relation 20170. Up to 3342 conditions per place. [2024-11-24 00:41:51,258 INFO L140 encePairwiseOnDemand]: 78/89 looper letters, 108 selfloop transitions, 25 changer transitions 0/150 dead transitions. [2024-11-24 00:41:51,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 150 transitions, 1252 flow [2024-11-24 00:41:51,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 00:41:51,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 00:41:51,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 423 transitions. [2024-11-24 00:41:51,260 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5280898876404494 [2024-11-24 00:41:51,260 INFO L175 Difference]: Start difference. First operand has 124 places, 115 transitions, 887 flow. Second operand 9 states and 423 transitions. [2024-11-24 00:41:51,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 150 transitions, 1252 flow [2024-11-24 00:41:51,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 150 transitions, 1217 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-24 00:41:51,291 INFO L231 Difference]: Finished difference. Result has 130 places, 118 transitions, 936 flow [2024-11-24 00:41:51,291 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=936, PETRI_PLACES=130, PETRI_TRANSITIONS=118} [2024-11-24 00:41:51,292 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 44 predicate places. [2024-11-24 00:41:51,292 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 118 transitions, 936 flow [2024-11-24 00:41:51,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 39.5) internal successors, (316), 8 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:51,292 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:41:51,293 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:41:51,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-24 00:41:51,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:41:51,497 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:41:51,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:41:51,498 INFO L85 PathProgramCache]: Analyzing trace with hash -2114918215, now seen corresponding path program 1 times [2024-11-24 00:41:51,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:41:51,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55536685] [2024-11-24 00:41:51,498 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:41:51,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:41:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:41:52,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:41:52,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:41:52,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55536685] [2024-11-24 00:41:52,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55536685] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:41:52,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605589794] [2024-11-24 00:41:52,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:41:52,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:41:52,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:41:52,175 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:41:52,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-24 00:41:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:41:52,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-24 00:41:52,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:41:52,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-24 00:41:52,490 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-24 00:41:52,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-11-24 00:41:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:41:53,301 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:41:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:41:53,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605589794] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 00:41:53,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:41:53,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 22 [2024-11-24 00:41:53,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926076415] [2024-11-24 00:41:53,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:41:53,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-24 00:41:53,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:41:53,776 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-24 00:41:53,776 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-11-24 00:41:54,297 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-24 00:41:54,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 118 transitions, 936 flow. Second operand has 8 states, 8 states have (on average 36.375) internal successors, (291), 8 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:54,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:41:54,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-24 00:41:54,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:41:56,171 INFO L124 PetriNetUnfolderBase]: 6231/9100 cut-off events. [2024-11-24 00:41:56,171 INFO L125 PetriNetUnfolderBase]: For 10432/11303 co-relation queries the response was YES. [2024-11-24 00:41:56,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26238 conditions, 9100 events. 6231/9100 cut-off events. For 10432/11303 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 53497 event pairs, 2024 based on Foata normal form. 393/7928 useless extension candidates. Maximal degree in co-relation 25970. Up to 4718 conditions per place. [2024-11-24 00:41:56,268 INFO L140 encePairwiseOnDemand]: 78/89 looper letters, 116 selfloop transitions, 24 changer transitions 0/154 dead transitions. [2024-11-24 00:41:56,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 154 transitions, 1347 flow [2024-11-24 00:41:56,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 00:41:56,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 00:41:56,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 400 transitions. [2024-11-24 00:41:56,271 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4993757802746567 [2024-11-24 00:41:56,271 INFO L175 Difference]: Start difference. First operand has 130 places, 118 transitions, 936 flow. Second operand 9 states and 400 transitions. [2024-11-24 00:41:56,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 154 transitions, 1347 flow [2024-11-24 00:41:56,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 154 transitions, 1310 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-24 00:41:56,302 INFO L231 Difference]: Finished difference. Result has 134 places, 118 transitions, 964 flow [2024-11-24 00:41:56,302 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=964, PETRI_PLACES=134, PETRI_TRANSITIONS=118} [2024-11-24 00:41:56,303 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 48 predicate places. [2024-11-24 00:41:56,303 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 118 transitions, 964 flow [2024-11-24 00:41:56,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 36.375) internal successors, (291), 8 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:56,303 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:41:56,304 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:41:56,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-24 00:41:56,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-24 00:41:56,504 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:41:56,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:41:56,505 INFO L85 PathProgramCache]: Analyzing trace with hash 2105647949, now seen corresponding path program 1 times [2024-11-24 00:41:56,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:41:56,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266920571] [2024-11-24 00:41:56,505 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:41:56,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:41:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:41:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-24 00:41:57,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:41:57,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266920571] [2024-11-24 00:41:57,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266920571] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:41:57,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449458165] [2024-11-24 00:41:57,065 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:41:57,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:41:57,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:41:57,067 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:41:57,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-24 00:41:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:41:57,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-24 00:41:57,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:41:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:41:57,362 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:41:57,489 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 [2024-11-24 00:41:57,552 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:41:57,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449458165] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:41:57,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:41:57,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2024-11-24 00:41:57,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793586930] [2024-11-24 00:41:57,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:41:57,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-24 00:41:57,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:41:57,554 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-24 00:41:57,554 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2024-11-24 00:41:59,021 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-24 00:41:59,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 118 transitions, 964 flow. Second operand has 19 states, 19 states have (on average 39.05263157894737) internal successors, (742), 19 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:41:59,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:41:59,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-24 00:41:59,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:42:01,217 INFO L124 PetriNetUnfolderBase]: 5515/8072 cut-off events. [2024-11-24 00:42:01,218 INFO L125 PetriNetUnfolderBase]: For 8752/9092 co-relation queries the response was YES. [2024-11-24 00:42:01,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23635 conditions, 8072 events. 5515/8072 cut-off events. For 8752/9092 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 46130 event pairs, 2613 based on Foata normal form. 348/6938 useless extension candidates. Maximal degree in co-relation 23362. Up to 4536 conditions per place. [2024-11-24 00:42:01,290 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 120 selfloop transitions, 31 changer transitions 12/178 dead transitions. [2024-11-24 00:42:01,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 178 transitions, 1523 flow [2024-11-24 00:42:01,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-24 00:42:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-24 00:42:01,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 593 transitions. [2024-11-24 00:42:01,292 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5125324114088159 [2024-11-24 00:42:01,292 INFO L175 Difference]: Start difference. First operand has 134 places, 118 transitions, 964 flow. Second operand 13 states and 593 transitions. [2024-11-24 00:42:01,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 178 transitions, 1523 flow [2024-11-24 00:42:01,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 178 transitions, 1466 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-24 00:42:01,325 INFO L231 Difference]: Finished difference. Result has 140 places, 114 transitions, 941 flow [2024-11-24 00:42:01,326 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=901, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=941, PETRI_PLACES=140, PETRI_TRANSITIONS=114} [2024-11-24 00:42:01,326 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 54 predicate places. [2024-11-24 00:42:01,326 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 114 transitions, 941 flow [2024-11-24 00:42:01,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 39.05263157894737) internal successors, (742), 19 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:42:01,327 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:42:01,327 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:42:01,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-24 00:42:01,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:42:01,528 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:42:01,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:42:01,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1361678330, now seen corresponding path program 1 times [2024-11-24 00:42:01,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:42:01,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965881323] [2024-11-24 00:42:01,531 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:42:01,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:42:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:42:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:42:01,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:42:01,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965881323] [2024-11-24 00:42:01,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965881323] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:42:01,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489557081] [2024-11-24 00:42:01,750 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:42:01,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:42:01,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:42:01,753 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:42:01,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-24 00:42:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:42:01,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 00:42:01,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:42:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:42:02,090 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:42:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:42:02,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489557081] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:42:02,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:42:02,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-24 00:42:02,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340359655] [2024-11-24 00:42:02,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:42:02,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-24 00:42:02,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:42:02,250 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-24 00:42:02,250 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2024-11-24 00:42:02,427 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-24 00:42:02,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 114 transitions, 941 flow. Second operand has 17 states, 17 states have (on average 38.64705882352941) internal successors, (657), 17 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:42:02,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:42:02,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-24 00:42:02,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:42:04,475 INFO L124 PetriNetUnfolderBase]: 8262/12153 cut-off events. [2024-11-24 00:42:04,475 INFO L125 PetriNetUnfolderBase]: For 17898/18500 co-relation queries the response was YES. [2024-11-24 00:42:04,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36049 conditions, 12153 events. 8262/12153 cut-off events. For 17898/18500 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 73053 event pairs, 4702 based on Foata normal form. 228/10629 useless extension candidates. Maximal degree in co-relation 22770. Up to 7043 conditions per place. [2024-11-24 00:42:04,582 INFO L140 encePairwiseOnDemand]: 75/89 looper letters, 136 selfloop transitions, 55 changer transitions 0/206 dead transitions. [2024-11-24 00:42:04,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 206 transitions, 1804 flow [2024-11-24 00:42:04,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-24 00:42:04,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-24 00:42:04,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 699 transitions. [2024-11-24 00:42:04,584 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5235955056179775 [2024-11-24 00:42:04,584 INFO L175 Difference]: Start difference. First operand has 140 places, 114 transitions, 941 flow. Second operand 15 states and 699 transitions. [2024-11-24 00:42:04,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 206 transitions, 1804 flow [2024-11-24 00:42:04,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 206 transitions, 1740 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-11-24 00:42:04,628 INFO L231 Difference]: Finished difference. Result has 150 places, 127 transitions, 1205 flow [2024-11-24 00:42:04,628 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1205, PETRI_PLACES=150, PETRI_TRANSITIONS=127} [2024-11-24 00:42:04,629 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 64 predicate places. [2024-11-24 00:42:04,629 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 127 transitions, 1205 flow [2024-11-24 00:42:04,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 38.64705882352941) internal successors, (657), 17 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:42:04,629 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:42:04,629 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:42:04,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-24 00:42:04,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:42:04,830 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:42:04,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:42:04,831 INFO L85 PathProgramCache]: Analyzing trace with hash -37326401, now seen corresponding path program 2 times [2024-11-24 00:42:04,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:42:04,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550311345] [2024-11-24 00:42:04,831 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:42:04,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:42:04,856 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:42:04,857 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:42:05,052 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-24 00:42:05,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:42:05,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550311345] [2024-11-24 00:42:05,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550311345] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:42:05,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:42:05,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 00:42:05,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222358026] [2024-11-24 00:42:05,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:42:05,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:42:05,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:42:05,055 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:42:05,055 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:42:05,073 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-24 00:42:05,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 127 transitions, 1205 flow. Second operand has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:42:05,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:42:05,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-24 00:42:05,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:42:07,279 INFO L124 PetriNetUnfolderBase]: 8406/12260 cut-off events. [2024-11-24 00:42:07,279 INFO L125 PetriNetUnfolderBase]: For 16663/17665 co-relation queries the response was YES. [2024-11-24 00:42:07,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36207 conditions, 12260 events. 8406/12260 cut-off events. For 16663/17665 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 70224 event pairs, 1252 based on Foata normal form. 916/11636 useless extension candidates. Maximal degree in co-relation 23564. Up to 8731 conditions per place. [2024-11-24 00:42:07,386 INFO L140 encePairwiseOnDemand]: 83/89 looper letters, 187 selfloop transitions, 9 changer transitions 0/210 dead transitions. [2024-11-24 00:42:07,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 210 transitions, 1994 flow [2024-11-24 00:42:07,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 00:42:07,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-24 00:42:07,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 322 transitions. [2024-11-24 00:42:07,388 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.602996254681648 [2024-11-24 00:42:07,388 INFO L175 Difference]: Start difference. First operand has 150 places, 127 transitions, 1205 flow. Second operand 6 states and 322 transitions. [2024-11-24 00:42:07,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 210 transitions, 1994 flow [2024-11-24 00:42:07,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 210 transitions, 1965 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-11-24 00:42:07,426 INFO L231 Difference]: Finished difference. Result has 158 places, 133 transitions, 1238 flow [2024-11-24 00:42:07,426 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1238, PETRI_PLACES=158, PETRI_TRANSITIONS=133} [2024-11-24 00:42:07,427 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 72 predicate places. [2024-11-24 00:42:07,427 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 133 transitions, 1238 flow [2024-11-24 00:42:07,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:42:07,427 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:42:07,428 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:42:07,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-24 00:42:07,428 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:42:07,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:42:07,428 INFO L85 PathProgramCache]: Analyzing trace with hash -619839489, now seen corresponding path program 1 times [2024-11-24 00:42:07,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:42:07,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345241563] [2024-11-24 00:42:07,429 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:42:07,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:42:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:42:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:42:07,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:42:07,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345241563] [2024-11-24 00:42:07,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345241563] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:42:07,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183923769] [2024-11-24 00:42:07,589 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:42:07,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:42:07,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:42:07,592 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:42:07,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-24 00:42:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:42:07,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 00:42:07,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:42:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:42:07,911 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:42:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:42:08,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183923769] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:42:08,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:42:08,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-24 00:42:08,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017567034] [2024-11-24 00:42:08,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:42:08,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-24 00:42:08,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:42:08,052 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-24 00:42:08,052 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2024-11-24 00:42:08,289 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-24 00:42:08,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 133 transitions, 1238 flow. Second operand has 17 states, 17 states have (on average 38.64705882352941) internal successors, (657), 17 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:42:08,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:42:08,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-24 00:42:08,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:42:09,932 INFO L124 PetriNetUnfolderBase]: 6086/9897 cut-off events. [2024-11-24 00:42:09,932 INFO L125 PetriNetUnfolderBase]: For 15911/16680 co-relation queries the response was YES. [2024-11-24 00:42:09,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30582 conditions, 9897 events. 6086/9897 cut-off events. For 15911/16680 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 63885 event pairs, 3592 based on Foata normal form. 322/8972 useless extension candidates. Maximal degree in co-relation 21932. Up to 6041 conditions per place. [2024-11-24 00:42:10,020 INFO L140 encePairwiseOnDemand]: 75/89 looper letters, 134 selfloop transitions, 56 changer transitions 0/208 dead transitions. [2024-11-24 00:42:10,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 208 transitions, 1991 flow [2024-11-24 00:42:10,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-24 00:42:10,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-24 00:42:10,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 691 transitions. [2024-11-24 00:42:10,022 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5176029962546816 [2024-11-24 00:42:10,022 INFO L175 Difference]: Start difference. First operand has 158 places, 133 transitions, 1238 flow. Second operand 15 states and 691 transitions. [2024-11-24 00:42:10,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 208 transitions, 1991 flow [2024-11-24 00:42:10,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 208 transitions, 1983 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-24 00:42:10,069 INFO L231 Difference]: Finished difference. Result has 175 places, 137 transitions, 1406 flow [2024-11-24 00:42:10,069 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1406, PETRI_PLACES=175, PETRI_TRANSITIONS=137} [2024-11-24 00:42:10,070 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 89 predicate places. [2024-11-24 00:42:10,070 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 137 transitions, 1406 flow [2024-11-24 00:42:10,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 38.64705882352941) internal successors, (657), 17 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:42:10,070 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:42:10,070 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:42:10,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-24 00:42:10,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-24 00:42:10,271 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:42:10,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:42:10,271 INFO L85 PathProgramCache]: Analyzing trace with hash -222388927, now seen corresponding path program 1 times [2024-11-24 00:42:10,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:42:10,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138442899] [2024-11-24 00:42:10,272 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:42:10,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:42:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:42:10,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:42:10,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:42:10,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138442899] [2024-11-24 00:42:10,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138442899] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:42:10,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:42:10,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 00:42:10,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688662058] [2024-11-24 00:42:10,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:42:10,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:42:10,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:42:10,446 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:42:10,447 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:42:10,618 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-24 00:42:10,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 137 transitions, 1406 flow. Second operand has 6 states, 6 states have (on average 41.0) internal successors, (246), 6 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:42:10,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:42:10,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-24 00:42:10,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:42:12,779 INFO L124 PetriNetUnfolderBase]: 9654/15226 cut-off events. [2024-11-24 00:42:12,779 INFO L125 PetriNetUnfolderBase]: For 28471/30034 co-relation queries the response was YES. [2024-11-24 00:42:12,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48541 conditions, 15226 events. 9654/15226 cut-off events. For 28471/30034 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 103096 event pairs, 1054 based on Foata normal form. 787/14014 useless extension candidates. Maximal degree in co-relation 34919. Up to 7025 conditions per place. [2024-11-24 00:42:12,942 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 172 selfloop transitions, 17 changer transitions 17/225 dead transitions. [2024-11-24 00:42:12,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 225 transitions, 2314 flow [2024-11-24 00:42:12,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 00:42:12,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 00:42:12,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 364 transitions. [2024-11-24 00:42:12,944 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5842696629213483 [2024-11-24 00:42:12,944 INFO L175 Difference]: Start difference. First operand has 175 places, 137 transitions, 1406 flow. Second operand 7 states and 364 transitions. [2024-11-24 00:42:12,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 225 transitions, 2314 flow [2024-11-24 00:42:13,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 225 transitions, 2212 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-11-24 00:42:13,035 INFO L231 Difference]: Finished difference. Result has 172 places, 135 transitions, 1279 flow [2024-11-24 00:42:13,036 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1310, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1279, PETRI_PLACES=172, PETRI_TRANSITIONS=135} [2024-11-24 00:42:13,036 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 86 predicate places. [2024-11-24 00:42:13,036 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 135 transitions, 1279 flow [2024-11-24 00:42:13,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.0) internal successors, (246), 6 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:42:13,037 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:42:13,037 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:42:13,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-24 00:42:13,037 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:42:13,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:42:13,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1445200004, now seen corresponding path program 1 times [2024-11-24 00:42:13,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:42:13,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369012382] [2024-11-24 00:42:13,038 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:42:13,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:42:13,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:42:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-24 00:42:13,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:42:13,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369012382] [2024-11-24 00:42:13,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369012382] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:42:13,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:42:13,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 00:42:13,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088463541] [2024-11-24 00:42:13,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:42:13,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 00:42:13,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:42:13,239 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 00:42:13,239 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-24 00:42:13,372 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-24 00:42:13,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 135 transitions, 1279 flow. Second operand has 7 states, 7 states have (on average 40.142857142857146) internal successors, (281), 7 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:42:13,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:42:13,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-24 00:42:13,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:42:17,610 INFO L124 PetriNetUnfolderBase]: 14599/23350 cut-off events. [2024-11-24 00:42:17,610 INFO L125 PetriNetUnfolderBase]: For 45816/47750 co-relation queries the response was YES. [2024-11-24 00:42:17,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78778 conditions, 23350 events. 14599/23350 cut-off events. For 45816/47750 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 177093 event pairs, 4209 based on Foata normal form. 1037/21984 useless extension candidates. Maximal degree in co-relation 58196. Up to 10652 conditions per place. [2024-11-24 00:42:17,840 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 211 selfloop transitions, 27 changer transitions 0/258 dead transitions. [2024-11-24 00:42:17,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 258 transitions, 2508 flow [2024-11-24 00:42:17,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 00:42:17,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 00:42:17,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 416 transitions. [2024-11-24 00:42:17,841 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5842696629213483 [2024-11-24 00:42:17,842 INFO L175 Difference]: Start difference. First operand has 172 places, 135 transitions, 1279 flow. Second operand 8 states and 416 transitions. [2024-11-24 00:42:17,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 258 transitions, 2508 flow [2024-11-24 00:42:18,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 258 transitions, 2358 flow, removed 21 selfloop flow, removed 14 redundant places. [2024-11-24 00:42:18,025 INFO L231 Difference]: Finished difference. Result has 159 places, 151 transitions, 1420 flow [2024-11-24 00:42:18,026 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1420, PETRI_PLACES=159, PETRI_TRANSITIONS=151} [2024-11-24 00:42:18,026 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 73 predicate places. [2024-11-24 00:42:18,027 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 151 transitions, 1420 flow [2024-11-24 00:42:18,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 40.142857142857146) internal successors, (281), 7 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:42:18,027 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:42:18,027 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:42:18,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-24 00:42:18,028 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:42:18,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:42:18,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1390978036, now seen corresponding path program 2 times [2024-11-24 00:42:18,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:42:18,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766450918] [2024-11-24 00:42:18,028 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:42:18,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:42:18,042 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 00:42:18,042 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:42:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-24 00:42:18,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:42:18,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766450918] [2024-11-24 00:42:18,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766450918] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:42:18,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:42:18,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:42:18,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152672978] [2024-11-24 00:42:18,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:42:18,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:42:18,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:42:18,108 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:42:18,109 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:42:18,270 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-24 00:42:18,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 151 transitions, 1420 flow. Second operand has 5 states, 5 states have (on average 41.4) internal successors, (207), 5 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:42:18,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:42:18,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-24 00:42:18,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:42:22,633 INFO L124 PetriNetUnfolderBase]: 15870/24570 cut-off events. [2024-11-24 00:42:22,634 INFO L125 PetriNetUnfolderBase]: For 58063/60192 co-relation queries the response was YES. [2024-11-24 00:42:22,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87524 conditions, 24570 events. 15870/24570 cut-off events. For 58063/60192 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 178353 event pairs, 930 based on Foata normal form. 1338/23194 useless extension candidates. Maximal degree in co-relation 64696. Up to 10917 conditions per place. [2024-11-24 00:42:22,854 INFO L140 encePairwiseOnDemand]: 82/89 looper letters, 219 selfloop transitions, 37 changer transitions 0/276 dead transitions. [2024-11-24 00:42:22,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 276 transitions, 2660 flow [2024-11-24 00:42:22,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 00:42:22,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 00:42:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 391 transitions. [2024-11-24 00:42:22,856 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6276083467094703 [2024-11-24 00:42:22,856 INFO L175 Difference]: Start difference. First operand has 159 places, 151 transitions, 1420 flow. Second operand 7 states and 391 transitions. [2024-11-24 00:42:22,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 276 transitions, 2660 flow [2024-11-24 00:42:23,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 276 transitions, 2625 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-24 00:42:23,432 INFO L231 Difference]: Finished difference. Result has 164 places, 160 transitions, 1575 flow [2024-11-24 00:42:23,432 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1387, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1575, PETRI_PLACES=164, PETRI_TRANSITIONS=160} [2024-11-24 00:42:23,432 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 78 predicate places. [2024-11-24 00:42:23,432 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 160 transitions, 1575 flow [2024-11-24 00:42:23,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.4) internal successors, (207), 5 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:42:23,433 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:42:23,433 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:42:23,433 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-24 00:42:23,433 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:42:23,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:42:23,434 INFO L85 PathProgramCache]: Analyzing trace with hash -7325802, now seen corresponding path program 3 times [2024-11-24 00:42:23,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:42:23,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733045695] [2024-11-24 00:42:23,434 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:42:23,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:42:23,448 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-24 00:42:23,448 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:42:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-24 00:42:23,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:42:23,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733045695] [2024-11-24 00:42:23,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733045695] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:42:23,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:42:23,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:42:23,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304169796] [2024-11-24 00:42:23,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:42:23,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:42:23,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:42:23,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:42:23,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:42:23,640 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-24 00:42:23,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 160 transitions, 1575 flow. Second operand has 5 states, 5 states have (on average 41.4) internal successors, (207), 5 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:42:23,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:42:23,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-24 00:42:23,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:42:28,202 INFO L124 PetriNetUnfolderBase]: 16526/25894 cut-off events. [2024-11-24 00:42:28,203 INFO L125 PetriNetUnfolderBase]: For 83286/86426 co-relation queries the response was YES. [2024-11-24 00:42:28,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96019 conditions, 25894 events. 16526/25894 cut-off events. For 83286/86426 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 191448 event pairs, 3816 based on Foata normal form. 1630/24742 useless extension candidates. Maximal degree in co-relation 72082. Up to 7848 conditions per place. [2024-11-24 00:42:28,450 INFO L140 encePairwiseOnDemand]: 82/89 looper letters, 251 selfloop transitions, 32 changer transitions 0/303 dead transitions. [2024-11-24 00:42:28,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 303 transitions, 3021 flow [2024-11-24 00:42:28,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 00:42:28,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 00:42:28,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 397 transitions. [2024-11-24 00:42:28,452 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.637239165329053 [2024-11-24 00:42:28,452 INFO L175 Difference]: Start difference. First operand has 164 places, 160 transitions, 1575 flow. Second operand 7 states and 397 transitions. [2024-11-24 00:42:28,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 303 transitions, 3021 flow [2024-11-24 00:42:29,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 303 transitions, 2872 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-11-24 00:42:29,400 INFO L231 Difference]: Finished difference. Result has 168 places, 174 transitions, 1731 flow [2024-11-24 00:42:29,400 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1731, PETRI_PLACES=168, PETRI_TRANSITIONS=174} [2024-11-24 00:42:29,401 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 82 predicate places. [2024-11-24 00:42:29,401 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 174 transitions, 1731 flow [2024-11-24 00:42:29,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.4) internal successors, (207), 5 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:42:29,401 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:42:29,401 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:42:29,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-24 00:42:29,401 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:42:29,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:42:29,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1720340320, now seen corresponding path program 2 times [2024-11-24 00:42:29,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:42:29,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432521230] [2024-11-24 00:42:29,403 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:42:29,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:42:29,435 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:42:29,435 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:42:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-24 00:42:30,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:42:30,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432521230] [2024-11-24 00:42:30,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432521230] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:42:30,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123708479] [2024-11-24 00:42:30,124 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:42:30,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:42:30,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:42:30,127 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:42:30,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-24 00:42:30,321 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:42:30,321 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:42:30,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-24 00:42:30,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:42:30,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-24 00:42:30,537 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-24 00:42:30,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2024-11-24 00:42:30,713 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-24 00:42:30,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2024-11-24 00:42:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-24 00:42:31,779 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:42:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-24 00:42:32,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123708479] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:42:32,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:42:32,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 9] total 31 [2024-11-24 00:42:32,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186682007] [2024-11-24 00:42:32,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:42:32,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-24 00:42:32,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:42:32,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-24 00:42:32,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2024-11-24 00:42:37,678 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 89 [2024-11-24 00:42:37,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 174 transitions, 1731 flow. Second operand has 33 states, 33 states have (on average 29.575757575757574) internal successors, (976), 33 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:42:37,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:42:37,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 89 [2024-11-24 00:42:37,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:42:49,839 INFO L124 PetriNetUnfolderBase]: 30158/44483 cut-off events. [2024-11-24 00:42:49,839 INFO L125 PetriNetUnfolderBase]: For 137194/141406 co-relation queries the response was YES. [2024-11-24 00:42:50,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164958 conditions, 44483 events. 30158/44483 cut-off events. For 137194/141406 co-relation queries the response was YES. Maximal size of possible extension queue 1449. Compared 320615 event pairs, 3063 based on Foata normal form. 3242/41689 useless extension candidates. Maximal degree in co-relation 123050. Up to 12098 conditions per place. [2024-11-24 00:42:50,541 INFO L140 encePairwiseOnDemand]: 77/89 looper letters, 365 selfloop transitions, 65 changer transitions 0/447 dead transitions. [2024-11-24 00:42:50,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 447 transitions, 4553 flow [2024-11-24 00:42:50,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-24 00:42:50,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-24 00:42:50,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 804 transitions. [2024-11-24 00:42:50,544 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4301765650080257 [2024-11-24 00:42:50,544 INFO L175 Difference]: Start difference. First operand has 168 places, 174 transitions, 1731 flow. Second operand 21 states and 804 transitions. [2024-11-24 00:42:50,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 447 transitions, 4553 flow [2024-11-24 00:42:53,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 447 transitions, 4462 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-11-24 00:42:53,508 INFO L231 Difference]: Finished difference. Result has 187 places, 187 transitions, 1980 flow [2024-11-24 00:42:53,508 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1980, PETRI_PLACES=187, PETRI_TRANSITIONS=187} [2024-11-24 00:42:53,509 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 101 predicate places. [2024-11-24 00:42:53,509 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 187 transitions, 1980 flow [2024-11-24 00:42:53,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 29.575757575757574) internal successors, (976), 33 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:42:53,510 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:42:53,510 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:42:53,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-24 00:42:53,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-24 00:42:53,710 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-24 00:42:53,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:42:53,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1720340316, now seen corresponding path program 1 times [2024-11-24 00:42:53,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:42:53,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198928715] [2024-11-24 00:42:53,711 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:42:53,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:42:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:42:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-24 00:42:54,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:42:54,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198928715] [2024-11-24 00:42:54,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198928715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:42:54,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120410908] [2024-11-24 00:42:54,241 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:42:54,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:42:54,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:42:54,243 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:42:54,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1d14ad45-f5c7-451f-b679-fb37070aea13/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-24 00:42:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:42:54,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-24 00:42:54,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:42:54,508 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 [2024-11-24 00:42:54,883 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-24 00:42:54,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-24 00:42:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-24 00:42:55,102 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:42:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-24 00:42:55,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120410908] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:42:55,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:42:55,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 26 [2024-11-24 00:42:55,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31765922] [2024-11-24 00:42:55,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:42:55,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-24 00:42:55,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:42:55,590 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-24 00:42:55,590 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2024-11-24 00:42:58,878 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 89 [2024-11-24 00:42:58,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 187 transitions, 1980 flow. Second operand has 27 states, 27 states have (on average 35.666666666666664) internal successors, (963), 27 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:42:58,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:42:58,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 89 [2024-11-24 00:42:58,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:10,433 INFO L124 PetriNetUnfolderBase]: 34066/52012 cut-off events. [2024-11-24 00:43:10,434 INFO L125 PetriNetUnfolderBase]: For 195778/200368 co-relation queries the response was YES. [2024-11-24 00:43:10,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203546 conditions, 52012 events. 34066/52012 cut-off events. For 195778/200368 co-relation queries the response was YES. Maximal size of possible extension queue 1528. Compared 402528 event pairs, 8925 based on Foata normal form. 3809/50376 useless extension candidates. Maximal degree in co-relation 159840. Up to 12871 conditions per place. [2024-11-24 00:43:11,214 INFO L140 encePairwiseOnDemand]: 74/89 looper letters, 397 selfloop transitions, 112 changer transitions 0/527 dead transitions. [2024-11-24 00:43:11,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 527 transitions, 5617 flow [2024-11-24 00:43:11,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-24 00:43:11,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-24 00:43:11,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 902 transitions. [2024-11-24 00:43:11,217 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5334121821407452 [2024-11-24 00:43:11,217 INFO L175 Difference]: Start difference. First operand has 187 places, 187 transitions, 1980 flow. Second operand 19 states and 902 transitions. [2024-11-24 00:43:11,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 527 transitions, 5617 flow