./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB --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 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:56:46,723 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:56:46,823 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 03:56:46,833 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:56:46,835 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:56:46,868 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:56:46,868 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:56:46,869 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:56:46,869 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:56:46,869 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:56:46,870 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:56:46,871 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:56:46,871 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:56:46,871 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:56:46,871 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:56:46,871 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:56:46,872 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:56:46,872 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:56:46,872 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:56:46,872 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:56:46,872 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 03:56:46,872 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 03:56:46,872 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 03:56:46,872 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:56:46,872 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 03:56:46,872 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 03:56:46,872 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:56:46,872 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:56:46,872 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:56:46,873 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:56:46,874 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:56:46,874 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:56:46,874 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:56:46,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:56:46,874 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:56:46,874 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:56:46,875 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:56:46,875 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:56:46,875 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:56:46,875 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:56:46,875 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:56:46,875 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:56:46,875 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:56:46,876 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:56:46,876 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:56:46,876 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:56:46,876 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:56:46,876 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_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a [2024-11-28 03:56:47,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:56:47,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:56:47,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:56:47,218 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:56:47,218 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:56:47,219 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2024-11-28 03:56:50,080 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/data/266bb19bb/5ed7c7fe7e194cac991e53d7b0702f8e/FLAG4e3d036e9 [2024-11-28 03:56:50,380 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:56:50,384 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2024-11-28 03:56:50,414 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/data/266bb19bb/5ed7c7fe7e194cac991e53d7b0702f8e/FLAG4e3d036e9 [2024-11-28 03:56:50,444 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/data/266bb19bb/5ed7c7fe7e194cac991e53d7b0702f8e [2024-11-28 03:56:50,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:56:50,449 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:56:50,450 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:56:50,451 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:56:50,455 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:56:50,456 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:56:50" (1/1) ... [2024-11-28 03:56:50,457 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c6a2b1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:56:50, skipping insertion in model container [2024-11-28 03:56:50,457 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:56:50" (1/1) ... [2024-11-28 03:56:50,473 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:56:50,683 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 03:56:50,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:56:50,697 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:56:50,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:56:50,744 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:56:50,744 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:56:50 WrapperNode [2024-11-28 03:56:50,744 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:56:50,745 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:56:50,746 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:56:50,746 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:56:50,752 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:56:50" (1/1) ... [2024-11-28 03:56:50,760 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:56:50" (1/1) ... [2024-11-28 03:56:50,785 INFO L138 Inliner]: procedures = 24, calls = 20, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 88 [2024-11-28 03:56:50,788 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:56:50,789 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:56:50,789 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:56:50,789 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:56:50,799 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:56:50" (1/1) ... [2024-11-28 03:56:50,799 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:56:50" (1/1) ... [2024-11-28 03:56:50,801 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:56:50" (1/1) ... [2024-11-28 03:56:50,814 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-28 03:56:50,815 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:56:50" (1/1) ... [2024-11-28 03:56:50,815 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:56:50" (1/1) ... [2024-11-28 03:56:50,829 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:56:50" (1/1) ... [2024-11-28 03:56:50,830 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:56:50" (1/1) ... [2024-11-28 03:56:50,836 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:56:50" (1/1) ... [2024-11-28 03:56:50,837 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:56:50" (1/1) ... [2024-11-28 03:56:50,838 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:56:50" (1/1) ... [2024-11-28 03:56:50,843 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:56:50,844 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:56:50,844 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:56:50,844 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:56:50,849 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:56:50" (1/1) ... [2024-11-28 03:56:50,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:56:50,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:56:50,881 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:56:50,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:56:50,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:56:50,916 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 03:56:50,917 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 03:56:50,917 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 03:56:50,917 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 03:56:50,917 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 03:56:50,917 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 03:56:50,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:56:50,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 03:56:50,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 03:56:50,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 03:56:50,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 03:56:50,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:56:50,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:56:50,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 03:56:50,918 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 03:56:50,919 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 03:56:51,046 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:56:51,048 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:56:51,414 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 03:56:51,415 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:56:51,720 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:56:51,721 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 03:56:51,721 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:56:51 BoogieIcfgContainer [2024-11-28 03:56:51,721 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:56:51,724 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:56:51,726 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:56:51,732 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:56:51,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:56:50" (1/3) ... [2024-11-28 03:56:51,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38d4ec57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:56:51, skipping insertion in model container [2024-11-28 03:56:51,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:56:50" (2/3) ... [2024-11-28 03:56:51,734 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38d4ec57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:56:51, skipping insertion in model container [2024-11-28 03:56:51,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:56:51" (3/3) ... [2024-11-28 03:56:51,735 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2024-11-28 03:56:51,751 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:56:51,753 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-sum-array-hom.wvr.c that has 4 procedures, 38 locations, 1 initial locations, 4 loop locations, and 10 error locations. [2024-11-28 03:56:51,753 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 03:56:51,869 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 03:56:51,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 41 transitions, 103 flow [2024-11-28 03:56:51,944 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2024-11-28 03:56:51,950 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 03:56:51,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 38 events. 4/38 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 64 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-11-28 03:56:51,956 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 41 transitions, 103 flow [2024-11-28 03:56:51,959 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 37 transitions, 92 flow [2024-11-28 03:56:51,968 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:56:51,979 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;@5de95bc0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:56:51,980 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-28 03:56:51,984 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 03:56:51,984 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-28 03:56:51,984 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 03:56:51,984 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:56:51,985 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 03:56:51,985 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:56:51,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:56:51,990 INFO L85 PathProgramCache]: Analyzing trace with hash 412921, now seen corresponding path program 1 times [2024-11-28 03:56:51,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:56:51,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652623245] [2024-11-28 03:56:51,999 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:56:51,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:56:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:56:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:56:52,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:56:52,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652623245] [2024-11-28 03:56:52,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652623245] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:56:52,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:56:52,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 03:56:52,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581058768] [2024-11-28 03:56:52,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:56:52,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:56:52,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:56:52,350 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:56:52,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:56:52,375 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-28 03:56:52,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:56:52,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:56:52,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-28 03:56:52,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:56:52,564 INFO L124 PetriNetUnfolderBase]: 200/339 cut-off events. [2024-11-28 03:56:52,565 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-11-28 03:56:52,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 678 conditions, 339 events. 200/339 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1081 event pairs, 124 based on Foata normal form. 1/312 useless extension candidates. Maximal degree in co-relation 576. Up to 293 conditions per place. [2024-11-28 03:56:52,571 INFO L140 encePairwiseOnDemand]: 37/41 looper letters, 21 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-11-28 03:56:52,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 34 transitions, 132 flow [2024-11-28 03:56:52,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:56:52,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:56:52,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-11-28 03:56:52,588 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-11-28 03:56:52,590 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 92 flow. Second operand 3 states and 70 transitions. [2024-11-28 03:56:52,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 34 transitions, 132 flow [2024-11-28 03:56:52,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 120 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 03:56:52,601 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 78 flow [2024-11-28 03:56:52,604 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2024-11-28 03:56:52,609 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, -7 predicate places. [2024-11-28 03:56:52,609 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 78 flow [2024-11-28 03:56:52,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:56:52,610 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:56:52,610 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 03:56:52,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:56:52,610 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:56:52,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:56:52,611 INFO L85 PathProgramCache]: Analyzing trace with hash 412922, now seen corresponding path program 1 times [2024-11-28 03:56:52,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:56:52,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251772526] [2024-11-28 03:56:52,611 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:56:52,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:56:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:56:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:56:53,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:56:53,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251772526] [2024-11-28 03:56:53,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251772526] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:56:53,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:56:53,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:56:53,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839667577] [2024-11-28 03:56:53,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:56:53,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:56:53,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:56:53,072 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:56:53,073 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:56:53,120 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-28 03:56:53,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:56:53,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:56:53,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-28 03:56:53,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:56:53,369 INFO L124 PetriNetUnfolderBase]: 201/342 cut-off events. [2024-11-28 03:56:53,369 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 03:56:53,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 342 events. 201/342 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1097 event pairs, 124 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 638. Up to 298 conditions per place. [2024-11-28 03:56:53,373 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 23 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2024-11-28 03:56:53,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 140 flow [2024-11-28 03:56:53,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:56:53,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:56:53,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-11-28 03:56:53,375 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-11-28 03:56:53,376 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 78 flow. Second operand 4 states and 88 transitions. [2024-11-28 03:56:53,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 140 flow [2024-11-28 03:56:53,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 37 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:56:53,378 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 101 flow [2024-11-28 03:56:53,378 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-11-28 03:56:53,379 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, -4 predicate places. [2024-11-28 03:56:53,379 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 101 flow [2024-11-28 03:56:53,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:56:53,381 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:56:53,381 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-28 03:56:53,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 03:56:53,382 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:56:53,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:56:53,386 INFO L85 PathProgramCache]: Analyzing trace with hash 396831188, now seen corresponding path program 1 times [2024-11-28 03:56:53,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:56:53,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445113682] [2024-11-28 03:56:53,386 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:56:53,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:56:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:56:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:56:53,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:56:53,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445113682] [2024-11-28 03:56:53,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445113682] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:56:53,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744364885] [2024-11-28 03:56:53,874 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:56:53,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:56:53,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:56:53,878 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:56:53,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:56:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:56:53,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 03:56:53,968 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:56:54,040 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 [2024-11-28 03:56:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:56:54,381 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:56:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:56:54,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744364885] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:56:54,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:56:54,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-28 03:56:54,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491204217] [2024-11-28 03:56:54,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:56:54,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:56:54,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:56:54,549 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:56:54,549 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:56:54,695 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-28 03:56:54,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 101 flow. Second operand has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:56:54,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:56:54,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-28 03:56:54,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:56:55,093 INFO L124 PetriNetUnfolderBase]: 202/344 cut-off events. [2024-11-28 03:56:55,093 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 03:56:55,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 676 conditions, 344 events. 202/344 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1100 event pairs, 124 based on Foata normal form. 0/315 useless extension candidates. Maximal degree in co-relation 645. Up to 295 conditions per place. [2024-11-28 03:56:55,100 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 19 selfloop transitions, 10 changer transitions 0/39 dead transitions. [2024-11-28 03:56:55,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 167 flow [2024-11-28 03:56:55,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:56:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:56:55,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-11-28 03:56:55,103 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-11-28 03:56:55,103 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 101 flow. Second operand 8 states and 151 transitions. [2024-11-28 03:56:55,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 167 flow [2024-11-28 03:56:55,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:56:55,105 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 126 flow [2024-11-28 03:56:55,105 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=126, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2024-11-28 03:56:55,106 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2024-11-28 03:56:55,106 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 126 flow [2024-11-28 03:56:55,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:56:55,109 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:56:55,109 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 03:56:55,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 03:56:55,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:56:55,313 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:56:55,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:56:55,314 INFO L85 PathProgramCache]: Analyzing trace with hash -581250644, now seen corresponding path program 1 times [2024-11-28 03:56:55,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:56:55,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209987329] [2024-11-28 03:56:55,314 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:56:55,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:56:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:56:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:56:55,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:56:55,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209987329] [2024-11-28 03:56:55,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209987329] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:56:55,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:56:55,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:56:55,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224767508] [2024-11-28 03:56:55,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:56:55,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 03:56:55,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:56:55,445 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 03:56:55,445 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 03:56:55,484 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-11-28 03:56:55,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:56:55,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:56:55,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-11-28 03:56:55,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:56:55,614 INFO L124 PetriNetUnfolderBase]: 202/330 cut-off events. [2024-11-28 03:56:55,615 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 03:56:55,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 670 conditions, 330 events. 202/330 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 976 event pairs, 124 based on Foata normal form. 0/315 useless extension candidates. Maximal degree in co-relation 632. Up to 294 conditions per place. [2024-11-28 03:56:55,619 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 25 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2024-11-28 03:56:55,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 36 transitions, 178 flow [2024-11-28 03:56:55,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 03:56:55,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 03:56:55,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2024-11-28 03:56:55,620 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-11-28 03:56:55,621 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 126 flow. Second operand 4 states and 74 transitions. [2024-11-28 03:56:55,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 36 transitions, 178 flow [2024-11-28 03:56:55,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 136 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-28 03:56:55,622 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 86 flow [2024-11-28 03:56:55,623 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2024-11-28 03:56:55,623 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, -6 predicate places. [2024-11-28 03:56:55,623 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 86 flow [2024-11-28 03:56:55,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:56:55,626 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:56:55,626 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-28 03:56:55,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 03:56:55,626 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:56:55,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:56:55,627 INFO L85 PathProgramCache]: Analyzing trace with hash -581250643, now seen corresponding path program 1 times [2024-11-28 03:56:55,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:56:55,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633709216] [2024-11-28 03:56:55,627 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:56:55,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:56:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:56:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:56:55,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:56:55,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633709216] [2024-11-28 03:56:55,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633709216] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:56:55,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:56:55,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:56:55,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102133960] [2024-11-28 03:56:55,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:56:55,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:56:55,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:56:55,733 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:56:55,733 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:56:55,753 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-28 03:56:55,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:56:55,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:56:55,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-28 03:56:55,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:56:55,991 INFO L124 PetriNetUnfolderBase]: 433/704 cut-off events. [2024-11-28 03:56:55,991 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-28 03:56:55,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1392 conditions, 704 events. 433/704 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2605 event pairs, 248 based on Foata normal form. 0/670 useless extension candidates. Maximal degree in co-relation 805. Up to 384 conditions per place. [2024-11-28 03:56:55,996 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 54 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2024-11-28 03:56:55,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 65 transitions, 270 flow [2024-11-28 03:56:55,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:56:55,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:56:55,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-11-28 03:56:55,997 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6439024390243903 [2024-11-28 03:56:55,997 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 86 flow. Second operand 5 states and 132 transitions. [2024-11-28 03:56:55,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 65 transitions, 270 flow [2024-11-28 03:56:55,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 65 transitions, 265 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:56:55,999 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 106 flow [2024-11-28 03:56:55,999 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2024-11-28 03:56:56,000 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2024-11-28 03:56:56,000 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 106 flow [2024-11-28 03:56:56,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:56:56,000 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:56:56,000 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:56:56,000 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 03:56:56,001 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:56:56,001 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:56:56,001 INFO L85 PathProgramCache]: Analyzing trace with hash -245667789, now seen corresponding path program 1 times [2024-11-28 03:56:56,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:56:56,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212837426] [2024-11-28 03:56:56,001 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:56:56,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:56:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:56:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:56:56,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:56:56,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212837426] [2024-11-28 03:56:56,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212837426] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:56:56,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:56:56,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:56:56,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372733209] [2024-11-28 03:56:56,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:56:56,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:56:56,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:56:56,129 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:56:56,129 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:56:56,153 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-28 03:56:56,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:56:56,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:56:56,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-28 03:56:56,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:56:56,348 INFO L124 PetriNetUnfolderBase]: 410/677 cut-off events. [2024-11-28 03:56:56,348 INFO L125 PetriNetUnfolderBase]: For 222/253 co-relation queries the response was YES. [2024-11-28 03:56:56,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1520 conditions, 677 events. 410/677 cut-off events. For 222/253 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2530 event pairs, 248 based on Foata normal form. 0/641 useless extension candidates. Maximal degree in co-relation 897. Up to 389 conditions per place. [2024-11-28 03:56:56,354 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 51 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2024-11-28 03:56:56,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 62 transitions, 282 flow [2024-11-28 03:56:56,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:56:56,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:56:56,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-11-28 03:56:56,356 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-11-28 03:56:56,356 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 106 flow. Second operand 5 states and 129 transitions. [2024-11-28 03:56:56,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 62 transitions, 282 flow [2024-11-28 03:56:56,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 62 transitions, 277 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:56:56,358 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 126 flow [2024-11-28 03:56:56,358 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-11-28 03:56:56,362 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2024-11-28 03:56:56,363 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 126 flow [2024-11-28 03:56:56,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:56:56,363 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:56:56,363 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:56:56,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 03:56:56,363 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:56:56,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:56:56,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2044752237, now seen corresponding path program 1 times [2024-11-28 03:56:56,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:56:56,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919717668] [2024-11-28 03:56:56,364 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:56:56,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:56:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:56:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:56:56,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:56:56,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919717668] [2024-11-28 03:56:56,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919717668] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:56:56,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632915908] [2024-11-28 03:56:56,605 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:56:56,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:56:56,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:56:56,610 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:56:56,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:56:56,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:56:56,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:56:56,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:56:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:56:56,796 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:56:56,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-28 03:56:56,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:56:56,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632915908] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:56:56,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:56:56,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-28 03:56:56,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607331465] [2024-11-28 03:56:56,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:56:56,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:56:56,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:56:56,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:56:56,871 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:56:57,082 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-28 03:56:57,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 126 flow. Second operand has 11 states, 11 states have (on average 16.454545454545453) internal successors, (181), 11 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:56:57,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:56:57,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-28 03:56:57,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:56:57,466 INFO L124 PetriNetUnfolderBase]: 491/815 cut-off events. [2024-11-28 03:56:57,466 INFO L125 PetriNetUnfolderBase]: For 431/488 co-relation queries the response was YES. [2024-11-28 03:56:57,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2006 conditions, 815 events. 491/815 cut-off events. For 431/488 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3313 event pairs, 293 based on Foata normal form. 0/773 useless extension candidates. Maximal degree in co-relation 1266. Up to 404 conditions per place. [2024-11-28 03:56:57,471 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 52 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-11-28 03:56:57,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 66 transitions, 312 flow [2024-11-28 03:56:57,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:56:57,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:56:57,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-11-28 03:56:57,472 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-11-28 03:56:57,473 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 126 flow. Second operand 6 states and 148 transitions. [2024-11-28 03:56:57,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 66 transitions, 312 flow [2024-11-28 03:56:57,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 66 transitions, 307 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:56:57,475 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 152 flow [2024-11-28 03:56:57,475 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-11-28 03:56:57,476 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-11-28 03:56:57,476 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 152 flow [2024-11-28 03:56:57,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.454545454545453) internal successors, (181), 11 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:56:57,476 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:56:57,476 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:56:57,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 03:56:57,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-28 03:56:57,677 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:56:57,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:56:57,679 INFO L85 PathProgramCache]: Analyzing trace with hash 130482817, now seen corresponding path program 1 times [2024-11-28 03:56:57,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:56:57,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721685608] [2024-11-28 03:56:57,680 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:56:57,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:56:57,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:56:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:56:57,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:56:57,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721685608] [2024-11-28 03:56:57,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721685608] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:56:57,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:56:57,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:56:57,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014555237] [2024-11-28 03:56:57,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:56:57,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:56:57,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:56:57,796 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:56:57,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:56:57,820 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-28 03:56:57,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:56:57,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:56:57,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-28 03:56:57,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:56:58,021 INFO L124 PetriNetUnfolderBase]: 483/769 cut-off events. [2024-11-28 03:56:58,021 INFO L125 PetriNetUnfolderBase]: For 936/1111 co-relation queries the response was YES. [2024-11-28 03:56:58,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2176 conditions, 769 events. 483/769 cut-off events. For 936/1111 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2882 event pairs, 306 based on Foata normal form. 0/735 useless extension candidates. Maximal degree in co-relation 1480. Up to 511 conditions per place. [2024-11-28 03:56:58,039 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 50 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-11-28 03:56:58,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 324 flow [2024-11-28 03:56:58,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:56:58,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:56:58,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-11-28 03:56:58,040 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-11-28 03:56:58,040 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 152 flow. Second operand 5 states and 126 transitions. [2024-11-28 03:56:58,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 324 flow [2024-11-28 03:56:58,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 309 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-28 03:56:58,043 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 164 flow [2024-11-28 03:56:58,043 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-11-28 03:56:58,044 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-11-28 03:56:58,044 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 164 flow [2024-11-28 03:56:58,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:56:58,044 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:56:58,044 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:56:58,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-28 03:56:58,045 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:56:58,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:56:58,046 INFO L85 PathProgramCache]: Analyzing trace with hash 2078573465, now seen corresponding path program 1 times [2024-11-28 03:56:58,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:56:58,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915345725] [2024-11-28 03:56:58,046 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:56:58,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:56:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:56:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:56:58,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:56:58,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915345725] [2024-11-28 03:56:58,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915345725] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:56:58,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557732952] [2024-11-28 03:56:58,222 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:56:58,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:56:58,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:56:58,224 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:56:58,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:56:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:56:58,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 03:56:58,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:56:58,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:56:58,407 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:56:58,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-28 03:56:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:56:58,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557732952] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:56:58,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:56:58,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-28 03:56:58,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615121101] [2024-11-28 03:56:58,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:56:58,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:56:58,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:56:58,504 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:56:58,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:56:58,668 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-28 03:56:58,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 164 flow. Second operand has 11 states, 11 states have (on average 16.818181818181817) internal successors, (185), 11 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:56:58,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:56:58,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-28 03:56:58,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:56:59,017 INFO L124 PetriNetUnfolderBase]: 625/1024 cut-off events. [2024-11-28 03:56:59,017 INFO L125 PetriNetUnfolderBase]: For 1060/1282 co-relation queries the response was YES. [2024-11-28 03:56:59,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2920 conditions, 1024 events. 625/1024 cut-off events. For 1060/1282 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4440 event pairs, 358 based on Foata normal form. 0/981 useless extension candidates. Maximal degree in co-relation 2177. Up to 564 conditions per place. [2024-11-28 03:56:59,027 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 54 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2024-11-28 03:56:59,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 68 transitions, 367 flow [2024-11-28 03:56:59,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:56:59,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:56:59,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-11-28 03:56:59,030 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-11-28 03:56:59,030 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 164 flow. Second operand 6 states and 146 transitions. [2024-11-28 03:56:59,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 68 transitions, 367 flow [2024-11-28 03:56:59,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 68 transitions, 362 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:56:59,037 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 190 flow [2024-11-28 03:56:59,037 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2024-11-28 03:56:59,038 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-11-28 03:56:59,038 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 190 flow [2024-11-28 03:56:59,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.818181818181817) internal successors, (185), 11 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:56:59,038 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:56:59,038 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:56:59,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:56:59,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-28 03:56:59,239 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:56:59,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:56:59,239 INFO L85 PathProgramCache]: Analyzing trace with hash 2088135223, now seen corresponding path program 1 times [2024-11-28 03:56:59,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:56:59,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803080748] [2024-11-28 03:56:59,240 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:56:59,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:56:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:56:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:56:59,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:56:59,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803080748] [2024-11-28 03:56:59,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803080748] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:56:59,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685763195] [2024-11-28 03:56:59,363 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:56:59,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:56:59,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:56:59,365 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:56:59,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:56:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:56:59,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:56:59,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:56:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:56:59,534 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:56:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:56:59,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685763195] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:56:59,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:56:59,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 03:56:59,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373317512] [2024-11-28 03:56:59,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:56:59,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:56:59,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:56:59,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:56:59,604 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:56:59,675 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-28 03:56:59,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 190 flow. Second operand has 14 states, 14 states have (on average 16.714285714285715) internal successors, (234), 14 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:56:59,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:56:59,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-28 03:56:59,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:00,203 INFO L124 PetriNetUnfolderBase]: 1167/1863 cut-off events. [2024-11-28 03:57:00,203 INFO L125 PetriNetUnfolderBase]: For 2519/2881 co-relation queries the response was YES. [2024-11-28 03:57:00,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5842 conditions, 1863 events. 1167/1863 cut-off events. For 2519/2881 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8852 event pairs, 547 based on Foata normal form. 34/1893 useless extension candidates. Maximal degree in co-relation 3771. Up to 806 conditions per place. [2024-11-28 03:57:00,218 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 80 selfloop transitions, 13 changer transitions 0/99 dead transitions. [2024-11-28 03:57:00,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 99 transitions, 594 flow [2024-11-28 03:57:00,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:57:00,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:57:00,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-11-28 03:57:00,220 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-11-28 03:57:00,220 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 190 flow. Second operand 8 states and 194 transitions. [2024-11-28 03:57:00,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 99 transitions, 594 flow [2024-11-28 03:57:00,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 99 transitions, 573 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-28 03:57:00,227 INFO L231 Difference]: Finished difference. Result has 61 places, 50 transitions, 250 flow [2024-11-28 03:57:00,227 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=250, PETRI_PLACES=61, PETRI_TRANSITIONS=50} [2024-11-28 03:57:00,228 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-11-28 03:57:00,228 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 50 transitions, 250 flow [2024-11-28 03:57:00,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.714285714285715) internal successors, (234), 14 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:00,228 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:00,228 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:57:00,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 03:57:00,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 03:57:00,429 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:57:00,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:00,430 INFO L85 PathProgramCache]: Analyzing trace with hash 343333991, now seen corresponding path program 1 times [2024-11-28 03:57:00,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:00,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325156938] [2024-11-28 03:57:00,430 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:00,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:00,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:57:00,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:00,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325156938] [2024-11-28 03:57:00,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325156938] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:00,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830192257] [2024-11-28 03:57:00,741 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:00,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:00,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:00,744 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:00,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:57:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:00,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 03:57:00,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:57:01,041 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 03:57:01,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830192257] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:01,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 03:57:01,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2024-11-28 03:57:01,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320144403] [2024-11-28 03:57:01,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:01,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:57:01,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:01,044 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:57:01,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:57:01,181 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-28 03:57:01,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 50 transitions, 250 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:01,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:01,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-28 03:57:01,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:01,563 INFO L124 PetriNetUnfolderBase]: 1113/1703 cut-off events. [2024-11-28 03:57:01,563 INFO L125 PetriNetUnfolderBase]: For 4523/5050 co-relation queries the response was YES. [2024-11-28 03:57:01,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6102 conditions, 1703 events. 1113/1703 cut-off events. For 4523/5050 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7645 event pairs, 409 based on Foata normal form. 0/1620 useless extension candidates. Maximal degree in co-relation 4222. Up to 896 conditions per place. [2024-11-28 03:57:01,577 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 72 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2024-11-28 03:57:01,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 87 transitions, 658 flow [2024-11-28 03:57:01,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 03:57:01,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 03:57:01,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-11-28 03:57:01,579 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-11-28 03:57:01,579 INFO L175 Difference]: Start difference. First operand has 61 places, 50 transitions, 250 flow. Second operand 6 states and 127 transitions. [2024-11-28 03:57:01,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 87 transitions, 658 flow [2024-11-28 03:57:01,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 87 transitions, 634 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-28 03:57:01,589 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 252 flow [2024-11-28 03:57:01,589 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2024-11-28 03:57:01,591 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-11-28 03:57:01,591 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 252 flow [2024-11-28 03:57:01,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:01,591 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:01,591 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:57:01,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 03:57:01,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 03:57:01,792 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:57:01,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:01,793 INFO L85 PathProgramCache]: Analyzing trace with hash 349320829, now seen corresponding path program 1 times [2024-11-28 03:57:01,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:01,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736575808] [2024-11-28 03:57:01,793 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:01,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:01,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:57:01,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:01,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736575808] [2024-11-28 03:57:01,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736575808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:01,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039054508] [2024-11-28 03:57:01,939 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:01,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:01,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:01,941 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:01,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:57:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:02,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:57:02,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:57:02,137 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:57:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:57:02,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039054508] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:57:02,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:57:02,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-28 03:57:02,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524415739] [2024-11-28 03:57:02,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:57:02,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:57:02,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:02,213 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:57:02,213 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:57:02,307 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-28 03:57:02,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 252 flow. Second operand has 15 states, 15 states have (on average 16.933333333333334) internal successors, (254), 15 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:02,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:02,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-28 03:57:02,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:02,783 INFO L124 PetriNetUnfolderBase]: 1136/1737 cut-off events. [2024-11-28 03:57:02,783 INFO L125 PetriNetUnfolderBase]: For 4582/5078 co-relation queries the response was YES. [2024-11-28 03:57:02,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6476 conditions, 1737 events. 1136/1737 cut-off events. For 4582/5078 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7511 event pairs, 544 based on Foata normal form. 35/1769 useless extension candidates. Maximal degree in co-relation 4587. Up to 816 conditions per place. [2024-11-28 03:57:02,796 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 75 selfloop transitions, 13 changer transitions 0/93 dead transitions. [2024-11-28 03:57:02,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 93 transitions, 653 flow [2024-11-28 03:57:02,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:57:02,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:57:02,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-11-28 03:57:02,798 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-11-28 03:57:02,798 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 252 flow. Second operand 8 states and 192 transitions. [2024-11-28 03:57:02,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 93 transitions, 653 flow [2024-11-28 03:57:02,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 93 transitions, 611 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-28 03:57:02,807 INFO L231 Difference]: Finished difference. Result has 66 places, 53 transitions, 305 flow [2024-11-28 03:57:02,808 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=305, PETRI_PLACES=66, PETRI_TRANSITIONS=53} [2024-11-28 03:57:02,808 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-11-28 03:57:02,808 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 53 transitions, 305 flow [2024-11-28 03:57:02,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.933333333333334) internal successors, (254), 15 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:02,809 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:02,809 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-28 03:57:02,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 03:57:03,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 03:57:03,009 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:57:03,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:03,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1993980899, now seen corresponding path program 2 times [2024-11-28 03:57:03,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:03,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474773921] [2024-11-28 03:57:03,010 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:57:03,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:03,029 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:57:03,030 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:57:03,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:03,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474773921] [2024-11-28 03:57:03,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474773921] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:03,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995797424] [2024-11-28 03:57:03,313 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:57:03,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:03,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:03,315 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:03,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:57:03,384 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:57:03,384 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:03,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 03:57:03,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:03,399 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 [2024-11-28 03:57:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:03,563 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:57:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:03,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995797424] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:57:03,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:57:03,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-28 03:57:03,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475434072] [2024-11-28 03:57:03,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:57:03,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:57:03,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:03,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:57:03,823 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:57:04,509 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-11-28 03:57:04,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 53 transitions, 305 flow. Second operand has 20 states, 20 states have (on average 14.75) internal successors, (295), 20 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:04,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:04,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-11-28 03:57:04,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:05,966 INFO L124 PetriNetUnfolderBase]: 1330/1986 cut-off events. [2024-11-28 03:57:05,967 INFO L125 PetriNetUnfolderBase]: For 5389/5889 co-relation queries the response was YES. [2024-11-28 03:57:05,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7682 conditions, 1986 events. 1330/1986 cut-off events. For 5389/5889 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8626 event pairs, 296 based on Foata normal form. 0/1982 useless extension candidates. Maximal degree in co-relation 5218. Up to 416 conditions per place. [2024-11-28 03:57:05,981 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 137 selfloop transitions, 21 changer transitions 0/162 dead transitions. [2024-11-28 03:57:05,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 162 transitions, 1124 flow [2024-11-28 03:57:05,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 03:57:05,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 03:57:05,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 318 transitions. [2024-11-28 03:57:05,983 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-11-28 03:57:05,983 INFO L175 Difference]: Start difference. First operand has 66 places, 53 transitions, 305 flow. Second operand 14 states and 318 transitions. [2024-11-28 03:57:05,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 162 transitions, 1124 flow [2024-11-28 03:57:05,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 162 transitions, 1096 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-28 03:57:05,994 INFO L231 Difference]: Finished difference. Result has 76 places, 56 transitions, 364 flow [2024-11-28 03:57:05,994 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=364, PETRI_PLACES=76, PETRI_TRANSITIONS=56} [2024-11-28 03:57:05,994 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-11-28 03:57:05,994 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 56 transitions, 364 flow [2024-11-28 03:57:05,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 14.75) internal successors, (295), 20 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:05,995 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:05,995 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:57:06,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 03:57:06,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 03:57:06,199 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:57:06,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:06,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1259131165, now seen corresponding path program 2 times [2024-11-28 03:57:06,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:06,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631798091] [2024-11-28 03:57:06,200 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:57:06,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:06,214 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:57:06,214 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:57:06,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:06,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631798091] [2024-11-28 03:57:06,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631798091] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:06,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150389324] [2024-11-28 03:57:06,453 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:57:06,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:06,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:06,455 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:06,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:57:06,525 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:57:06,525 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:06,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 03:57:06,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:06,687 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:57:06,829 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 [2024-11-28 03:57:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:06,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150389324] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:57:06,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:57:06,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-28 03:57:06,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543959828] [2024-11-28 03:57:06,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:57:06,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:57:06,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:06,895 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:57:06,895 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:57:07,468 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-28 03:57:07,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 56 transitions, 364 flow. Second operand has 20 states, 20 states have (on average 16.05) internal successors, (321), 20 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:07,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:07,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-28 03:57:07,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:08,638 INFO L124 PetriNetUnfolderBase]: 1587/2284 cut-off events. [2024-11-28 03:57:08,639 INFO L125 PetriNetUnfolderBase]: For 9465/10059 co-relation queries the response was YES. [2024-11-28 03:57:08,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9520 conditions, 2284 events. 1587/2284 cut-off events. For 9465/10059 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9511 event pairs, 312 based on Foata normal form. 0/2278 useless extension candidates. Maximal degree in co-relation 6545. Up to 481 conditions per place. [2024-11-28 03:57:08,659 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 140 selfloop transitions, 21 changer transitions 0/166 dead transitions. [2024-11-28 03:57:08,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 166 transitions, 1315 flow [2024-11-28 03:57:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 03:57:08,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 03:57:08,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 325 transitions. [2024-11-28 03:57:08,661 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5662020905923345 [2024-11-28 03:57:08,661 INFO L175 Difference]: Start difference. First operand has 76 places, 56 transitions, 364 flow. Second operand 14 states and 325 transitions. [2024-11-28 03:57:08,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 166 transitions, 1315 flow [2024-11-28 03:57:08,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 166 transitions, 1107 flow, removed 48 selfloop flow, removed 10 redundant places. [2024-11-28 03:57:08,675 INFO L231 Difference]: Finished difference. Result has 80 places, 59 transitions, 374 flow [2024-11-28 03:57:08,676 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=374, PETRI_PLACES=80, PETRI_TRANSITIONS=59} [2024-11-28 03:57:08,677 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-11-28 03:57:08,677 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 59 transitions, 374 flow [2024-11-28 03:57:08,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 16.05) internal successors, (321), 20 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:08,677 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:08,677 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:57:08,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 03:57:08,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 03:57:08,878 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:57:08,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:08,878 INFO L85 PathProgramCache]: Analyzing trace with hash 265243904, now seen corresponding path program 1 times [2024-11-28 03:57:08,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:08,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135793109] [2024-11-28 03:57:08,878 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:08,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:08,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:09,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:57:09,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:09,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135793109] [2024-11-28 03:57:09,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135793109] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:09,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:57:09,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:57:09,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188724464] [2024-11-28 03:57:09,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:09,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:57:09,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:09,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:57:09,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:57:09,099 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-11-28 03:57:09,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 59 transitions, 374 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:09,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:09,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-11-28 03:57:09,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:09,383 INFO L124 PetriNetUnfolderBase]: 1434/2293 cut-off events. [2024-11-28 03:57:09,383 INFO L125 PetriNetUnfolderBase]: For 8255/8609 co-relation queries the response was YES. [2024-11-28 03:57:09,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9370 conditions, 2293 events. 1434/2293 cut-off events. For 8255/8609 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10999 event pairs, 388 based on Foata normal form. 3/2277 useless extension candidates. Maximal degree in co-relation 6845. Up to 1405 conditions per place. [2024-11-28 03:57:09,430 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 60 selfloop transitions, 6 changer transitions 8/82 dead transitions. [2024-11-28 03:57:09,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 662 flow [2024-11-28 03:57:09,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:57:09,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:57:09,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-11-28 03:57:09,431 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7235772357723578 [2024-11-28 03:57:09,431 INFO L175 Difference]: Start difference. First operand has 80 places, 59 transitions, 374 flow. Second operand 3 states and 89 transitions. [2024-11-28 03:57:09,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 662 flow [2024-11-28 03:57:09,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 82 transitions, 574 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-11-28 03:57:09,443 INFO L231 Difference]: Finished difference. Result has 73 places, 57 transitions, 314 flow [2024-11-28 03:57:09,444 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=314, PETRI_PLACES=73, PETRI_TRANSITIONS=57} [2024-11-28 03:57:09,444 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-11-28 03:57:09,444 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 57 transitions, 314 flow [2024-11-28 03:57:09,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:09,444 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:09,444 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] [2024-11-28 03:57:09,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-28 03:57:09,445 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:57:09,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:09,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1762791014, now seen corresponding path program 1 times [2024-11-28 03:57:09,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:09,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879839111] [2024-11-28 03:57:09,446 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:09,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:09,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:09,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:09,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879839111] [2024-11-28 03:57:09,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879839111] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:09,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004148814] [2024-11-28 03:57:09,551 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:09,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:09,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:09,554 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:09,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:57:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:09,641 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:57:09,642 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:57:09,682 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:57:09,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:57:09,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004148814] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:09,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:57:09,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-28 03:57:09,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499360843] [2024-11-28 03:57:09,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:09,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:57:09,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:09,730 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:57:09,731 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:57:09,745 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-28 03:57:09,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 57 transitions, 314 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:09,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:09,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-28 03:57:09,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:10,028 INFO L124 PetriNetUnfolderBase]: 1581/2300 cut-off events. [2024-11-28 03:57:10,028 INFO L125 PetriNetUnfolderBase]: For 5848/6252 co-relation queries the response was YES. [2024-11-28 03:57:10,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8587 conditions, 2300 events. 1581/2300 cut-off events. For 5848/6252 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10469 event pairs, 481 based on Foata normal form. 108/2335 useless extension candidates. Maximal degree in co-relation 5714. Up to 1179 conditions per place. [2024-11-28 03:57:10,042 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 61 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2024-11-28 03:57:10,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 78 transitions, 576 flow [2024-11-28 03:57:10,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:57:10,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:57:10,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-11-28 03:57:10,045 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-11-28 03:57:10,045 INFO L175 Difference]: Start difference. First operand has 73 places, 57 transitions, 314 flow. Second operand 5 states and 113 transitions. [2024-11-28 03:57:10,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 78 transitions, 576 flow [2024-11-28 03:57:10,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 78 transitions, 483 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-11-28 03:57:10,063 INFO L231 Difference]: Finished difference. Result has 63 places, 56 transitions, 280 flow [2024-11-28 03:57:10,064 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=280, PETRI_PLACES=63, PETRI_TRANSITIONS=56} [2024-11-28 03:57:10,064 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-11-28 03:57:10,065 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 56 transitions, 280 flow [2024-11-28 03:57:10,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:10,065 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:10,065 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] [2024-11-28 03:57:10,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 03:57:10,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 03:57:10,270 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:57:10,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:10,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1904567804, now seen corresponding path program 1 times [2024-11-28 03:57:10,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:10,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995460397] [2024-11-28 03:57:10,271 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:10,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:57:10,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:10,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995460397] [2024-11-28 03:57:10,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995460397] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:10,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689805060] [2024-11-28 03:57:10,403 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:10,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:10,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:10,406 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:10,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:57:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:10,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:57:10,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:10,582 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:57:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:10,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689805060] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:10,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:57:10,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-28 03:57:10,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650124089] [2024-11-28 03:57:10,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:10,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:57:10,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:10,658 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:57:10,658 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:57:10,693 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-28 03:57:10,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 56 transitions, 280 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:10,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:10,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-28 03:57:10,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:11,184 INFO L124 PetriNetUnfolderBase]: 2124/3057 cut-off events. [2024-11-28 03:57:11,184 INFO L125 PetriNetUnfolderBase]: For 7241/7533 co-relation queries the response was YES. [2024-11-28 03:57:11,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10083 conditions, 3057 events. 2124/3057 cut-off events. For 7241/7533 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14276 event pairs, 589 based on Foata normal form. 0/2752 useless extension candidates. Maximal degree in co-relation 6782. Up to 1365 conditions per place. [2024-11-28 03:57:11,202 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 126 selfloop transitions, 28 changer transitions 0/159 dead transitions. [2024-11-28 03:57:11,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 159 transitions, 1196 flow [2024-11-28 03:57:11,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:57:11,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:57:11,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-11-28 03:57:11,204 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-11-28 03:57:11,204 INFO L175 Difference]: Start difference. First operand has 63 places, 56 transitions, 280 flow. Second operand 9 states and 206 transitions. [2024-11-28 03:57:11,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 159 transitions, 1196 flow [2024-11-28 03:57:11,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 159 transitions, 1137 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-28 03:57:11,215 INFO L231 Difference]: Finished difference. Result has 70 places, 72 transitions, 403 flow [2024-11-28 03:57:11,215 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=403, PETRI_PLACES=70, PETRI_TRANSITIONS=72} [2024-11-28 03:57:11,216 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-11-28 03:57:11,217 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 72 transitions, 403 flow [2024-11-28 03:57:11,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:11,217 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:11,218 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] [2024-11-28 03:57:11,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 03:57:11,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 03:57:11,418 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:57:11,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:11,419 INFO L85 PathProgramCache]: Analyzing trace with hash -992082222, now seen corresponding path program 2 times [2024-11-28 03:57:11,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:11,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856174504] [2024-11-28 03:57:11,419 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:57:11,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:11,432 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:57:11,433 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:57:11,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:11,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856174504] [2024-11-28 03:57:11,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856174504] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:11,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430680473] [2024-11-28 03:57:11,501 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:57:11,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:11,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:11,503 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:11,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:57:11,587 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:57:11,588 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:11,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:57:11,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:11,667 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:57:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:11,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430680473] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:11,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:57:11,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 12 [2024-11-28 03:57:11,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843021076] [2024-11-28 03:57:11,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:11,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:57:11,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:11,750 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:57:11,751 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:57:11,780 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-28 03:57:11,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 72 transitions, 403 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:11,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:11,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-28 03:57:11,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:12,292 INFO L124 PetriNetUnfolderBase]: 2767/3982 cut-off events. [2024-11-28 03:57:12,293 INFO L125 PetriNetUnfolderBase]: For 9008/9398 co-relation queries the response was YES. [2024-11-28 03:57:12,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14254 conditions, 3982 events. 2767/3982 cut-off events. For 9008/9398 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 19324 event pairs, 641 based on Foata normal form. 20/3918 useless extension candidates. Maximal degree in co-relation 11531. Up to 1452 conditions per place. [2024-11-28 03:57:12,316 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 131 selfloop transitions, 54 changer transitions 0/190 dead transitions. [2024-11-28 03:57:12,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 190 transitions, 1479 flow [2024-11-28 03:57:12,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:57:12,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:57:12,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-11-28 03:57:12,318 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-11-28 03:57:12,318 INFO L175 Difference]: Start difference. First operand has 70 places, 72 transitions, 403 flow. Second operand 9 states and 201 transitions. [2024-11-28 03:57:12,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 190 transitions, 1479 flow [2024-11-28 03:57:12,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 190 transitions, 1476 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:57:12,343 INFO L231 Difference]: Finished difference. Result has 82 places, 105 transitions, 841 flow [2024-11-28 03:57:12,343 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=841, PETRI_PLACES=82, PETRI_TRANSITIONS=105} [2024-11-28 03:57:12,344 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-11-28 03:57:12,344 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 105 transitions, 841 flow [2024-11-28 03:57:12,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:12,344 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:12,344 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] [2024-11-28 03:57:12,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 03:57:12,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 03:57:12,545 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:57:12,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:12,545 INFO L85 PathProgramCache]: Analyzing trace with hash -2041871226, now seen corresponding path program 3 times [2024-11-28 03:57:12,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:12,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085792510] [2024-11-28 03:57:12,546 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:57:12,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:12,559 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:57:12,559 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:57:12,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:12,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085792510] [2024-11-28 03:57:12,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085792510] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:12,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293179743] [2024-11-28 03:57:12,633 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:57:12,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:12,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:12,635 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:12,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:57:12,720 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:57:12,720 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:12,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:57:12,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:57:12,797 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:57:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:57:12,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293179743] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:57:12,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:57:12,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-28 03:57:12,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674710810] [2024-11-28 03:57:12,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:57:12,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 03:57:12,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:12,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 03:57:12,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-28 03:57:12,909 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-11-28 03:57:12,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 105 transitions, 841 flow. Second operand has 11 states, 11 states have (on average 16.0) internal successors, (176), 11 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) [2024-11-28 03:57:12,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:12,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-11-28 03:57:12,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:14,603 INFO L124 PetriNetUnfolderBase]: 6414/9064 cut-off events. [2024-11-28 03:57:14,603 INFO L125 PetriNetUnfolderBase]: For 34352/34352 co-relation queries the response was YES. [2024-11-28 03:57:14,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41750 conditions, 9064 events. 6414/9064 cut-off events. For 34352/34352 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 45735 event pairs, 374 based on Foata normal form. 22/9084 useless extension candidates. Maximal degree in co-relation 32995. Up to 2594 conditions per place. [2024-11-28 03:57:14,745 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 352 selfloop transitions, 430 changer transitions 0/783 dead transitions. [2024-11-28 03:57:14,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 783 transitions, 8193 flow [2024-11-28 03:57:14,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-28 03:57:14,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-28 03:57:14,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 661 transitions. [2024-11-28 03:57:14,750 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5200629425649095 [2024-11-28 03:57:14,750 INFO L175 Difference]: Start difference. First operand has 82 places, 105 transitions, 841 flow. Second operand 31 states and 661 transitions. [2024-11-28 03:57:14,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 783 transitions, 8193 flow [2024-11-28 03:57:15,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 783 transitions, 8118 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-11-28 03:57:15,098 INFO L231 Difference]: Finished difference. Result has 134 places, 554 transitions, 6957 flow [2024-11-28 03:57:15,098 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=6957, PETRI_PLACES=134, PETRI_TRANSITIONS=554} [2024-11-28 03:57:15,099 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-11-28 03:57:15,099 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 554 transitions, 6957 flow [2024-11-28 03:57:15,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.0) internal successors, (176), 11 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) [2024-11-28 03:57:15,099 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:15,099 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] [2024-11-28 03:57:15,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 03:57:15,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:15,300 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:57:15,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:15,301 INFO L85 PathProgramCache]: Analyzing trace with hash -443653554, now seen corresponding path program 4 times [2024-11-28 03:57:15,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:15,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330281530] [2024-11-28 03:57:15,301 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:57:15,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:15,311 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:57:15,311 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:57:15,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:15,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330281530] [2024-11-28 03:57:15,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330281530] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:15,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:57:15,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 03:57:15,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694361747] [2024-11-28 03:57:15,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:15,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:57:15,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:15,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:57:15,366 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:57:15,413 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-11-28 03:57:15,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 554 transitions, 6957 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:15,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:15,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-11-28 03:57:15,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:17,220 INFO L124 PetriNetUnfolderBase]: 6998/9888 cut-off events. [2024-11-28 03:57:17,221 INFO L125 PetriNetUnfolderBase]: For 73045/73045 co-relation queries the response was YES. [2024-11-28 03:57:17,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57861 conditions, 9888 events. 6998/9888 cut-off events. For 73045/73045 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 50129 event pairs, 1737 based on Foata normal form. 4/9890 useless extension candidates. Maximal degree in co-relation 56426. Up to 5726 conditions per place. [2024-11-28 03:57:17,318 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 502 selfloop transitions, 283 changer transitions 3/789 dead transitions. [2024-11-28 03:57:17,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 789 transitions, 11088 flow [2024-11-28 03:57:17,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:57:17,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:57:17,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-11-28 03:57:17,320 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-11-28 03:57:17,320 INFO L175 Difference]: Start difference. First operand has 134 places, 554 transitions, 6957 flow. Second operand 7 states and 165 transitions. [2024-11-28 03:57:17,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 789 transitions, 11088 flow [2024-11-28 03:57:18,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 789 transitions, 10769 flow, removed 128 selfloop flow, removed 1 redundant places. [2024-11-28 03:57:18,168 INFO L231 Difference]: Finished difference. Result has 144 places, 626 transitions, 8688 flow [2024-11-28 03:57:18,169 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6736, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8688, PETRI_PLACES=144, PETRI_TRANSITIONS=626} [2024-11-28 03:57:18,169 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-11-28 03:57:18,169 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 626 transitions, 8688 flow [2024-11-28 03:57:18,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:18,170 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:18,170 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] [2024-11-28 03:57:18,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-28 03:57:18,170 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:57:18,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:18,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1975984752, now seen corresponding path program 5 times [2024-11-28 03:57:18,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:18,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747873476] [2024-11-28 03:57:18,171 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:57:18,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:18,191 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:57:18,191 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:18,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:18,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747873476] [2024-11-28 03:57:18,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747873476] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:18,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506292430] [2024-11-28 03:57:18,304 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:57:18,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:18,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:18,307 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:18,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:57:18,393 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:57:18,393 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:18,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:57:18,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:18,494 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:57:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:18,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506292430] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:18,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:57:18,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-11-28 03:57:18,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103684993] [2024-11-28 03:57:18,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:18,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:57:18,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:18,588 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:57:18,588 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:57:18,619 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-28 03:57:18,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 626 transitions, 8688 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:18,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:18,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-28 03:57:18,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:20,090 INFO L124 PetriNetUnfolderBase]: 5748/8222 cut-off events. [2024-11-28 03:57:20,090 INFO L125 PetriNetUnfolderBase]: For 67327/67772 co-relation queries the response was YES. [2024-11-28 03:57:20,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50318 conditions, 8222 events. 5748/8222 cut-off events. For 67327/67772 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 43515 event pairs, 667 based on Foata normal form. 22/8230 useless extension candidates. Maximal degree in co-relation 49060. Up to 2710 conditions per place. [2024-11-28 03:57:20,181 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 419 selfloop transitions, 350 changer transitions 0/780 dead transitions. [2024-11-28 03:57:20,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 780 transitions, 11887 flow [2024-11-28 03:57:20,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:57:20,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:57:20,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-11-28 03:57:20,182 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-11-28 03:57:20,182 INFO L175 Difference]: Start difference. First operand has 144 places, 626 transitions, 8688 flow. Second operand 8 states and 187 transitions. [2024-11-28 03:57:20,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 780 transitions, 11887 flow [2024-11-28 03:57:20,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 780 transitions, 11575 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-11-28 03:57:20,865 INFO L231 Difference]: Finished difference. Result has 151 places, 682 transitions, 10471 flow [2024-11-28 03:57:20,865 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8414, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10471, PETRI_PLACES=151, PETRI_TRANSITIONS=682} [2024-11-28 03:57:20,866 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-11-28 03:57:20,866 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 682 transitions, 10471 flow [2024-11-28 03:57:20,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:20,866 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:20,866 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] [2024-11-28 03:57:20,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 03:57:21,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:21,067 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:57:21,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:21,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1153542514, now seen corresponding path program 6 times [2024-11-28 03:57:21,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:21,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491930665] [2024-11-28 03:57:21,067 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:57:21,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:21,079 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:57:21,079 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:57:21,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:21,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491930665] [2024-11-28 03:57:21,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491930665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:21,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273760605] [2024-11-28 03:57:21,155 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:57:21,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:21,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:21,158 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:21,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:57:21,243 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-28 03:57:21,244 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:21,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:57:21,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:21,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:21,371 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:57:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:21,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273760605] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:21,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:57:21,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2024-11-28 03:57:21,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188665053] [2024-11-28 03:57:21,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:21,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:57:21,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:21,469 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:57:21,469 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:57:21,495 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-28 03:57:21,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 682 transitions, 10471 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:21,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:21,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-28 03:57:21,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:23,308 INFO L124 PetriNetUnfolderBase]: 6084/8710 cut-off events. [2024-11-28 03:57:23,308 INFO L125 PetriNetUnfolderBase]: For 85182/85589 co-relation queries the response was YES. [2024-11-28 03:57:23,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56341 conditions, 8710 events. 6084/8710 cut-off events. For 85182/85589 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 46300 event pairs, 770 based on Foata normal form. 40/8722 useless extension candidates. Maximal degree in co-relation 55054. Up to 3231 conditions per place. [2024-11-28 03:57:23,411 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 356 selfloop transitions, 511 changer transitions 0/878 dead transitions. [2024-11-28 03:57:23,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 878 transitions, 14269 flow [2024-11-28 03:57:23,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:57:23,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:57:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-11-28 03:57:23,413 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-11-28 03:57:23,413 INFO L175 Difference]: Start difference. First operand has 151 places, 682 transitions, 10471 flow. Second operand 9 states and 215 transitions. [2024-11-28 03:57:23,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 878 transitions, 14269 flow [2024-11-28 03:57:24,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 878 transitions, 13779 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-11-28 03:57:24,327 INFO L231 Difference]: Finished difference. Result has 158 places, 745 transitions, 12611 flow [2024-11-28 03:57:24,327 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9998, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12611, PETRI_PLACES=158, PETRI_TRANSITIONS=745} [2024-11-28 03:57:24,328 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-11-28 03:57:24,328 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 745 transitions, 12611 flow [2024-11-28 03:57:24,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:24,328 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:24,328 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] [2024-11-28 03:57:24,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 03:57:24,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:24,529 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:57:24,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:24,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1880547316, now seen corresponding path program 7 times [2024-11-28 03:57:24,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:24,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632424789] [2024-11-28 03:57:24,529 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:57:24,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:24,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:57:24,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:24,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632424789] [2024-11-28 03:57:24,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632424789] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:24,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160899391] [2024-11-28 03:57:24,670 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:57:24,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:24,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:24,672 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:24,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 03:57:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:24,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:57:24,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:24,882 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:57:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:24,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160899391] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:24,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:57:24,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2024-11-28 03:57:24,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535965167] [2024-11-28 03:57:24,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:24,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:57:24,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:24,986 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:57:24,986 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:57:25,023 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-28 03:57:25,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 745 transitions, 12611 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:25,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:25,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-28 03:57:25,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:26,744 INFO L124 PetriNetUnfolderBase]: 6063/8674 cut-off events. [2024-11-28 03:57:26,744 INFO L125 PetriNetUnfolderBase]: For 97094/97487 co-relation queries the response was YES. [2024-11-28 03:57:26,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57799 conditions, 8674 events. 6063/8674 cut-off events. For 97094/97487 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 45972 event pairs, 791 based on Foata normal form. 26/8668 useless extension candidates. Maximal degree in co-relation 57373. Up to 3120 conditions per place. [2024-11-28 03:57:26,834 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 255 selfloop transitions, 561 changer transitions 0/827 dead transitions. [2024-11-28 03:57:26,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 827 transitions, 14854 flow [2024-11-28 03:57:26,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:57:26,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:57:26,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-11-28 03:57:26,836 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-11-28 03:57:26,836 INFO L175 Difference]: Start difference. First operand has 158 places, 745 transitions, 12611 flow. Second operand 9 states and 210 transitions. [2024-11-28 03:57:26,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 827 transitions, 14854 flow [2024-11-28 03:57:27,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 827 transitions, 14650 flow, removed 92 selfloop flow, removed 5 redundant places. [2024-11-28 03:57:27,825 INFO L231 Difference]: Finished difference. Result has 160 places, 748 transitions, 13556 flow [2024-11-28 03:57:27,825 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12400, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=557, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13556, PETRI_PLACES=160, PETRI_TRANSITIONS=748} [2024-11-28 03:57:27,825 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-11-28 03:57:27,825 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 748 transitions, 13556 flow [2024-11-28 03:57:27,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:27,826 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:27,826 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] [2024-11-28 03:57:27,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 03:57:28,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:28,027 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:57:28,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:28,027 INFO L85 PathProgramCache]: Analyzing trace with hash -710211500, now seen corresponding path program 8 times [2024-11-28 03:57:28,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:28,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668775319] [2024-11-28 03:57:28,027 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:57:28,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:28,038 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:57:28,038 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:57:28,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:28,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668775319] [2024-11-28 03:57:28,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668775319] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:28,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:57:28,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 03:57:28,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425268959] [2024-11-28 03:57:28,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:28,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:57:28,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:28,103 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:57:28,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:57:28,146 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-11-28 03:57:28,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 748 transitions, 13556 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:28,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:28,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-11-28 03:57:28,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:30,487 INFO L124 PetriNetUnfolderBase]: 8599/12120 cut-off events. [2024-11-28 03:57:30,487 INFO L125 PetriNetUnfolderBase]: For 143734/143734 co-relation queries the response was YES. [2024-11-28 03:57:30,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85007 conditions, 12120 events. 8599/12120 cut-off events. For 143734/143734 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 62747 event pairs, 2166 based on Foata normal form. 4/12122 useless extension candidates. Maximal degree in co-relation 83415. Up to 7877 conditions per place. [2024-11-28 03:57:30,620 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 806 selfloop transitions, 235 changer transitions 5/1047 dead transitions. [2024-11-28 03:57:30,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 1047 transitions, 19725 flow [2024-11-28 03:57:30,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:57:30,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:57:30,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-11-28 03:57:30,621 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-11-28 03:57:30,621 INFO L175 Difference]: Start difference. First operand has 160 places, 748 transitions, 13556 flow. Second operand 7 states and 163 transitions. [2024-11-28 03:57:30,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 1047 transitions, 19725 flow [2024-11-28 03:57:32,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 1047 transitions, 19393 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-28 03:57:32,468 INFO L231 Difference]: Finished difference. Result has 168 places, 846 transitions, 16241 flow [2024-11-28 03:57:32,469 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13272, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=16241, PETRI_PLACES=168, PETRI_TRANSITIONS=846} [2024-11-28 03:57:32,469 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-11-28 03:57:32,469 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 846 transitions, 16241 flow [2024-11-28 03:57:32,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:32,469 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:32,469 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] [2024-11-28 03:57:32,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-28 03:57:32,470 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:57:32,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:32,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1666436278, now seen corresponding path program 9 times [2024-11-28 03:57:32,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:32,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805215727] [2024-11-28 03:57:32,470 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:57:32,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:32,479 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-28 03:57:32,479 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:57:32,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:32,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805215727] [2024-11-28 03:57:32,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805215727] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:32,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:57:32,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 03:57:32,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73047319] [2024-11-28 03:57:32,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:32,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:57:32,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:32,539 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:57:32,539 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:57:32,586 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-11-28 03:57:32,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 846 transitions, 16241 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:32,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:32,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-11-28 03:57:32,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:36,237 INFO L124 PetriNetUnfolderBase]: 10564/14798 cut-off events. [2024-11-28 03:57:36,237 INFO L125 PetriNetUnfolderBase]: For 177513/177513 co-relation queries the response was YES. [2024-11-28 03:57:36,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110209 conditions, 14798 events. 10564/14798 cut-off events. For 177513/177513 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 78339 event pairs, 696 based on Foata normal form. 20/14816 useless extension candidates. Maximal degree in co-relation 108321. Up to 4252 conditions per place. [2024-11-28 03:57:36,378 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 505 selfloop transitions, 816 changer transitions 0/1322 dead transitions. [2024-11-28 03:57:36,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 1322 transitions, 26321 flow [2024-11-28 03:57:36,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 03:57:36,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-28 03:57:36,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 458 transitions. [2024-11-28 03:57:36,381 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5319396051103368 [2024-11-28 03:57:36,381 INFO L175 Difference]: Start difference. First operand has 168 places, 846 transitions, 16241 flow. Second operand 21 states and 458 transitions. [2024-11-28 03:57:36,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 1322 transitions, 26321 flow [2024-11-28 03:57:39,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 1322 transitions, 25951 flow, removed 80 selfloop flow, removed 2 redundant places. [2024-11-28 03:57:39,638 INFO L231 Difference]: Finished difference. Result has 199 places, 1133 transitions, 24373 flow [2024-11-28 03:57:39,639 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16010, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=529, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=24373, PETRI_PLACES=199, PETRI_TRANSITIONS=1133} [2024-11-28 03:57:39,639 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-11-28 03:57:39,639 INFO L471 AbstractCegarLoop]: Abstraction has has 199 places, 1133 transitions, 24373 flow [2024-11-28 03:57:39,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:39,639 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:39,639 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] [2024-11-28 03:57:39,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-28 03:57:39,640 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:57:39,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:39,640 INFO L85 PathProgramCache]: Analyzing trace with hash -340380976, now seen corresponding path program 10 times [2024-11-28 03:57:39,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:39,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903823677] [2024-11-28 03:57:39,640 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:57:39,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:39,651 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:57:39,651 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 03:57:39,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:39,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903823677] [2024-11-28 03:57:39,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903823677] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:57:39,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:57:39,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-28 03:57:39,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434424659] [2024-11-28 03:57:39,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:39,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:57:39,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:39,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:57:39,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-28 03:57:39,773 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-11-28 03:57:39,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 1133 transitions, 24373 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:39,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:39,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-11-28 03:57:39,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:43,784 INFO L124 PetriNetUnfolderBase]: 10649/14937 cut-off events. [2024-11-28 03:57:43,784 INFO L125 PetriNetUnfolderBase]: For 247593/247593 co-relation queries the response was YES. [2024-11-28 03:57:43,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121874 conditions, 14937 events. 10649/14937 cut-off events. For 247593/247593 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 78928 event pairs, 2231 based on Foata normal form. 8/14943 useless extension candidates. Maximal degree in co-relation 120737. Up to 8581 conditions per place. [2024-11-28 03:57:43,928 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 1028 selfloop transitions, 354 changer transitions 2/1385 dead transitions. [2024-11-28 03:57:43,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 1385 transitions, 30658 flow [2024-11-28 03:57:43,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:57:43,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:57:43,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-11-28 03:57:43,929 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-11-28 03:57:43,929 INFO L175 Difference]: Start difference. First operand has 199 places, 1133 transitions, 24373 flow. Second operand 7 states and 163 transitions. [2024-11-28 03:57:43,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 1385 transitions, 30658 flow [2024-11-28 03:57:48,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 1385 transitions, 30028 flow, removed 308 selfloop flow, removed 1 redundant places. [2024-11-28 03:57:48,100 INFO L231 Difference]: Finished difference. Result has 207 places, 1154 transitions, 25086 flow [2024-11-28 03:57:48,101 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=23875, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=790, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=25086, PETRI_PLACES=207, PETRI_TRANSITIONS=1154} [2024-11-28 03:57:48,101 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-11-28 03:57:48,101 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 1154 transitions, 25086 flow [2024-11-28 03:57:48,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:48,101 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:48,101 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] [2024-11-28 03:57:48,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-28 03:57:48,102 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:57:48,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:48,102 INFO L85 PathProgramCache]: Analyzing trace with hash -988086246, now seen corresponding path program 11 times [2024-11-28 03:57:48,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:48,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791327864] [2024-11-28 03:57:48,102 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:57:48,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:48,117 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:57:48,117 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:48,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:48,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791327864] [2024-11-28 03:57:48,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791327864] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:48,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197306920] [2024-11-28 03:57:48,214 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:57:48,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:48,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:48,217 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:48,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 03:57:48,309 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-28 03:57:48,309 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:57:48,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:57:48,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:48,395 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:57:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:48,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197306920] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:48,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:57:48,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2024-11-28 03:57:48,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006037016] [2024-11-28 03:57:48,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:57:48,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:57:48,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:48,488 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:57:48,488 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:57:48,520 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-28 03:57:48,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 1154 transitions, 25086 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:48,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:48,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-28 03:57:48,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:57:52,767 INFO L124 PetriNetUnfolderBase]: 8479/12028 cut-off events. [2024-11-28 03:57:52,767 INFO L125 PetriNetUnfolderBase]: For 202727/203542 co-relation queries the response was YES. [2024-11-28 03:57:52,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100607 conditions, 12028 events. 8479/12028 cut-off events. For 202727/203542 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 65509 event pairs, 556 based on Foata normal form. 50/12066 useless extension candidates. Maximal degree in co-relation 99277. Up to 2900 conditions per place. [2024-11-28 03:57:52,887 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 419 selfloop transitions, 798 changer transitions 0/1232 dead transitions. [2024-11-28 03:57:52,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 1232 transitions, 28049 flow [2024-11-28 03:57:52,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:57:52,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:57:52,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-11-28 03:57:52,889 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-11-28 03:57:52,889 INFO L175 Difference]: Start difference. First operand has 207 places, 1154 transitions, 25086 flow. Second operand 8 states and 184 transitions. [2024-11-28 03:57:52,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 1232 transitions, 28049 flow [2024-11-28 03:57:55,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 1232 transitions, 27531 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-11-28 03:57:55,769 INFO L231 Difference]: Finished difference. Result has 208 places, 1139 transitions, 25797 flow [2024-11-28 03:57:55,770 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=24201, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=798, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=25797, PETRI_PLACES=208, PETRI_TRANSITIONS=1139} [2024-11-28 03:57:55,770 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-11-28 03:57:55,770 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 1139 transitions, 25797 flow [2024-11-28 03:57:55,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:55,771 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:57:55,771 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] [2024-11-28 03:57:55,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 03:57:55,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:55,971 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:57:55,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:57:55,972 INFO L85 PathProgramCache]: Analyzing trace with hash 125464734, now seen corresponding path program 1 times [2024-11-28 03:57:55,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:57:55,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360666160] [2024-11-28 03:57:55,972 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:55,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:57:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:57:56,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:57:56,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360666160] [2024-11-28 03:57:56,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360666160] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:57:56,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550501309] [2024-11-28 03:57:56,353 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:57:56,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:57:56,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:57:56,355 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:57:56,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 03:57:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:57:56,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 03:57:56,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:57:56,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-28 03:57:56,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2024-11-28 03:57:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:57:56,825 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:57:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 03:57:57,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550501309] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:57:57,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:57:57,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 25 [2024-11-28 03:57:57,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599432635] [2024-11-28 03:57:57,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:57:57,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 03:57:57,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:57:57,234 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 03:57:57,234 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2024-11-28 03:57:57,982 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-28 03:57:57,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 1139 transitions, 25797 flow. Second operand has 26 states, 26 states have (on average 17.53846153846154) internal successors, (456), 26 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:57:57,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:57:57,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-28 03:57:57,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:58:02,573 INFO L124 PetriNetUnfolderBase]: 9617/14245 cut-off events. [2024-11-28 03:58:02,574 INFO L125 PetriNetUnfolderBase]: For 303347/304459 co-relation queries the response was YES. [2024-11-28 03:58:02,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125341 conditions, 14245 events. 9617/14245 cut-off events. For 303347/304459 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 87185 event pairs, 487 based on Foata normal form. 373/14479 useless extension candidates. Maximal degree in co-relation 123836. Up to 9413 conditions per place. [2024-11-28 03:58:02,734 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 880 selfloop transitions, 712 changer transitions 1/1704 dead transitions. [2024-11-28 03:58:02,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 1704 transitions, 41105 flow [2024-11-28 03:58:02,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:58:02,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 03:58:02,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 276 transitions. [2024-11-28 03:58:02,736 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-11-28 03:58:02,736 INFO L175 Difference]: Start difference. First operand has 208 places, 1139 transitions, 25797 flow. Second operand 12 states and 276 transitions. [2024-11-28 03:58:02,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 1704 transitions, 41105 flow [2024-11-28 03:58:07,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 1704 transitions, 40600 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-11-28 03:58:07,345 INFO L231 Difference]: Finished difference. Result has 221 places, 1527 transitions, 38614 flow [2024-11-28 03:58:07,345 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=25390, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=38614, PETRI_PLACES=221, PETRI_TRANSITIONS=1527} [2024-11-28 03:58:07,346 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-11-28 03:58:07,346 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 1527 transitions, 38614 flow [2024-11-28 03:58:07,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 17.53846153846154) internal successors, (456), 26 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:58:07,346 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:58:07,346 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] [2024-11-28 03:58:07,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-28 03:58:07,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 03:58:07,547 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:58:07,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:58:07,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1164727078, now seen corresponding path program 2 times [2024-11-28 03:58:07,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:58:07,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027238375] [2024-11-28 03:58:07,547 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:58:07,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:58:07,568 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:58:07,568 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:58:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:58:08,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:58:08,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027238375] [2024-11-28 03:58:08,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027238375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:58:08,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541064593] [2024-11-28 03:58:08,114 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:58:08,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:58:08,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:58:08,116 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:58:08,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 03:58:08,199 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:58:08,199 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:58:08,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 03:58:08,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:58:08,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-28 03:58:08,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2024-11-28 03:58:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:58:08,756 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:58:09,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 38 treesize of output 34 [2024-11-28 03:58:09,335 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:58:09,335 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 94 treesize of output 86 [2024-11-28 03:58:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:58:10,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541064593] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:58:10,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:58:10,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2024-11-28 03:58:10,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127204164] [2024-11-28 03:58:10,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:58:10,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 03:58:10,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:58:10,036 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 03:58:10,036 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2024-11-28 03:58:11,502 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-28 03:58:11,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 1527 transitions, 38614 flow. Second operand has 27 states, 27 states have (on average 16.555555555555557) internal successors, (447), 27 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:58:11,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:58:11,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-28 03:58:11,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:58:21,919 INFO L124 PetriNetUnfolderBase]: 15167/22035 cut-off events. [2024-11-28 03:58:21,919 INFO L125 PetriNetUnfolderBase]: For 519166/519910 co-relation queries the response was YES. [2024-11-28 03:58:22,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204475 conditions, 22035 events. 15167/22035 cut-off events. For 519166/519910 co-relation queries the response was YES. Maximal size of possible extension queue 973. Compared 135746 event pairs, 1122 based on Foata normal form. 5/22028 useless extension candidates. Maximal degree in co-relation 202150. Up to 14859 conditions per place. [2024-11-28 03:58:22,336 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 1953 selfloop transitions, 1434 changer transitions 9/3411 dead transitions. [2024-11-28 03:58:22,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 3411 transitions, 88872 flow [2024-11-28 03:58:22,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-28 03:58:22,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-11-28 03:58:22,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 882 transitions. [2024-11-28 03:58:22,339 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.551594746716698 [2024-11-28 03:58:22,339 INFO L175 Difference]: Start difference. First operand has 221 places, 1527 transitions, 38614 flow. Second operand 39 states and 882 transitions. [2024-11-28 03:58:22,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 3411 transitions, 88872 flow [2024-11-28 03:58:32,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 3411 transitions, 87789 flow, removed 309 selfloop flow, removed 3 redundant places. [2024-11-28 03:58:32,714 INFO L231 Difference]: Finished difference. Result has 283 places, 2746 transitions, 74757 flow [2024-11-28 03:58:32,715 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=38139, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=877, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=74757, PETRI_PLACES=283, PETRI_TRANSITIONS=2746} [2024-11-28 03:58:32,715 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-11-28 03:58:32,716 INFO L471 AbstractCegarLoop]: Abstraction has has 283 places, 2746 transitions, 74757 flow [2024-11-28 03:58:32,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 16.555555555555557) internal successors, (447), 27 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:58:32,716 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:58:32,716 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] [2024-11-28 03:58:32,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 03:58:32,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 03:58:32,917 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-28 03:58:32,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:58:32,917 INFO L85 PathProgramCache]: Analyzing trace with hash -670611768, now seen corresponding path program 1 times [2024-11-28 03:58:32,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:58:32,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965257475] [2024-11-28 03:58:32,917 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:58:32,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:58:32,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:58:33,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:58:33,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:58:33,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965257475] [2024-11-28 03:58:33,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965257475] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:58:33,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923869355] [2024-11-28 03:58:33,211 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:58:33,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:58:33,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:58:33,213 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:58:33,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aeb6c156-9af6-40ee-bf21-52a1995b6b30/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 03:58:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:58:33,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 03:58:33,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:58:33,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-28 03:58:33,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2024-11-28 03:58:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:58:33,544 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:58:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:58:33,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923869355] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:58:33,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:58:33,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 17 [2024-11-28 03:58:33,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374973253] [2024-11-28 03:58:33,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:58:33,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:58:33,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:58:33,742 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:58:33,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:58:34,174 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-11-28 03:58:34,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 2746 transitions, 74757 flow. Second operand has 18 states, 18 states have (on average 19.666666666666668) internal successors, (354), 18 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:58:34,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:58:34,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-11-28 03:58:34,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:58:46,354 INFO L124 PetriNetUnfolderBase]: 14348/21402 cut-off events. [2024-11-28 03:58:46,354 INFO L125 PetriNetUnfolderBase]: For 646596/648279 co-relation queries the response was YES. [2024-11-28 03:58:46,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223190 conditions, 21402 events. 14348/21402 cut-off events. For 646596/648279 co-relation queries the response was YES. Maximal size of possible extension queue 1127. Compared 141214 event pairs, 786 based on Foata normal form. 490/21368 useless extension candidates. Maximal degree in co-relation 221937. Up to 15498 conditions per place. [2024-11-28 03:58:46,653 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 1729 selfloop transitions, 725 changer transitions 17/3016 dead transitions. [2024-11-28 03:58:46,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 3016 transitions, 85920 flow [2024-11-28 03:58:46,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:58:46,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:58:46,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-11-28 03:58:46,654 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-11-28 03:58:46,654 INFO L175 Difference]: Start difference. First operand has 283 places, 2746 transitions, 74757 flow. Second operand 9 states and 222 transitions. [2024-11-28 03:58:46,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 3016 transitions, 85920 flow