./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 632917bb2a5e88c193ba7761220e89039206b92cb89d98172ae8e9ad69d27ca8 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 17:58:55,631 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 17:58:55,717 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 17:58:55,722 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 17:58:55,722 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 17:58:55,743 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 17:58:55,746 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 17:58:55,747 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 17:58:55,747 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 17:58:55,748 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 17:58:55,748 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 17:58:55,749 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 17:58:55,750 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 17:58:55,754 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 17:58:55,755 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 17:58:55,755 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 17:58:55,756 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 17:58:55,756 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 17:58:55,757 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 17:58:55,757 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 17:58:55,757 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 17:58:55,758 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 17:58:55,758 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 17:58:55,759 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 17:58:55,759 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 17:58:55,759 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 17:58:55,760 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 17:58:55,760 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 17:58:55,760 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 17:58:55,760 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 17:58:55,761 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 17:58:55,761 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 17:58:55,761 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 17:58:55,764 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:58:55,764 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 17:58:55,765 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 17:58:55,765 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 17:58:55,765 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 17:58:55,765 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 17:58:55,765 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 17:58:55,766 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 17:58:55,766 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 17:58:55,766 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 632917bb2a5e88c193ba7761220e89039206b92cb89d98172ae8e9ad69d27ca8 [2024-11-08 17:58:56,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 17:58:56,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 17:58:56,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 17:58:56,046 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 17:58:56,046 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 17:58:56,047 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c Unable to find full path for "g++" [2024-11-08 17:58:58,016 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 17:58:58,287 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 17:58:58,288 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2024-11-08 17:58:58,300 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/data/1ab602691/066d29b26bc64a7aaab4408cfca3623c/FLAG8b3ff62f1 [2024-11-08 17:58:58,317 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/data/1ab602691/066d29b26bc64a7aaab4408cfca3623c [2024-11-08 17:58:58,323 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 17:58:58,325 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 17:58:58,327 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 17:58:58,329 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 17:58:58,334 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 17:58:58,335 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:58:58" (1/1) ... [2024-11-08 17:58:58,336 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3da8297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:58:58, skipping insertion in model container [2024-11-08 17:58:58,337 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:58:58" (1/1) ... [2024-11-08 17:58:58,371 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 17:58:58,599 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 17:58:58,603 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:58:58,612 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 17:58:58,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:58:58,659 INFO L204 MainTranslator]: Completed translation [2024-11-08 17:58:58,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:58:58 WrapperNode [2024-11-08 17:58:58,660 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 17:58:58,661 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 17:58:58,661 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 17:58:58,661 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 17:58:58,669 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:58:58" (1/1) ... [2024-11-08 17:58:58,677 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:58:58" (1/1) ... [2024-11-08 17:58:58,713 INFO L138 Inliner]: procedures = 25, calls = 43, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 220 [2024-11-08 17:58:58,713 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 17:58:58,714 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 17:58:58,714 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 17:58:58,714 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 17:58:58,726 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:58:58" (1/1) ... [2024-11-08 17:58:58,726 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:58:58" (1/1) ... [2024-11-08 17:58:58,730 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:58:58" (1/1) ... [2024-11-08 17:58:58,753 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-08 17:58:58,753 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:58:58" (1/1) ... [2024-11-08 17:58:58,753 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:58:58" (1/1) ... [2024-11-08 17:58:58,773 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:58:58" (1/1) ... [2024-11-08 17:58:58,778 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:58:58" (1/1) ... [2024-11-08 17:58:58,780 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:58:58" (1/1) ... [2024-11-08 17:58:58,782 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:58:58" (1/1) ... [2024-11-08 17:58:58,785 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 17:58:58,786 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 17:58:58,786 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 17:58:58,786 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 17:58:58,787 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:58:58" (1/1) ... [2024-11-08 17:58:58,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:58:58,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:58:58,825 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 17:58:58,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 17:58:58,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 17:58:58,859 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 17:58:58,859 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 17:58:58,859 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 17:58:58,859 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 17:58:58,859 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-08 17:58:58,860 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-08 17:58:58,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 17:58:58,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 17:58:58,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 17:58:58,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 17:58:58,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-08 17:58:58,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-08 17:58:58,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 17:58:58,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 17:58:58,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 17:58:58,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 17:58:58,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 17:58:58,863 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 17:58:58,985 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 17:58:58,987 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 17:58:59,672 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 17:58:59,672 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 17:59:00,110 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 17:59:00,110 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 17:59:00,110 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:59:00 BoogieIcfgContainer [2024-11-08 17:59:00,110 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 17:59:00,116 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 17:59:00,116 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 17:59:00,134 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 17:59:00,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 05:58:58" (1/3) ... [2024-11-08 17:59:00,135 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e42a0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:59:00, skipping insertion in model container [2024-11-08 17:59:00,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:58:58" (2/3) ... [2024-11-08 17:59:00,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e42a0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:59:00, skipping insertion in model container [2024-11-08 17:59:00,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:59:00" (3/3) ... [2024-11-08 17:59:00,140 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-min.wvr.c [2024-11-08 17:59:00,160 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 17:59:00,160 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-11-08 17:59:00,160 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 17:59:00,266 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-08 17:59:00,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 107 transitions, 235 flow [2024-11-08 17:59:00,370 INFO L124 PetriNetUnfolderBase]: 15/104 cut-off events. [2024-11-08 17:59:00,370 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-08 17:59:00,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 104 events. 15/104 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 288 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2024-11-08 17:59:00,378 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 107 transitions, 235 flow [2024-11-08 17:59:00,384 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 98 places, 103 transitions, 224 flow [2024-11-08 17:59:00,396 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 17:59:00,402 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;@4bcd12d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 17:59:00,402 INFO L334 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2024-11-08 17:59:00,406 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 17:59:00,407 INFO L124 PetriNetUnfolderBase]: 3/10 cut-off events. [2024-11-08 17:59:00,407 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 17:59:00,407 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:59:00,408 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 17:59:00,408 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 17:59:00,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:59:00,413 INFO L85 PathProgramCache]: Analyzing trace with hash 28011397, now seen corresponding path program 1 times [2024-11-08 17:59:00,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:59:00,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569988762] [2024-11-08 17:59:00,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:00,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:59:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:59:00,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:59:00,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569988762] [2024-11-08 17:59:00,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569988762] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:59:00,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:59:00,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 17:59:00,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441710582] [2024-11-08 17:59:00,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:59:00,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:59:00,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:59:00,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:59:00,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:59:00,807 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 107 [2024-11-08 17:59:00,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 103 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:00,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:59:00,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 107 [2024-11-08 17:59:00,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:59:01,875 INFO L124 PetriNetUnfolderBase]: 3116/5113 cut-off events. [2024-11-08 17:59:01,875 INFO L125 PetriNetUnfolderBase]: For 233/233 co-relation queries the response was YES. [2024-11-08 17:59:01,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9233 conditions, 5113 events. 3116/5113 cut-off events. For 233/233 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 35799 event pairs, 2134 based on Foata normal form. 1/3389 useless extension candidates. Maximal degree in co-relation 8688. Up to 3883 conditions per place. [2024-11-08 17:59:01,938 INFO L140 encePairwiseOnDemand]: 99/107 looper letters, 46 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2024-11-08 17:59:01,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 96 transitions, 306 flow [2024-11-08 17:59:01,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:59:01,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:59:01,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 210 transitions. [2024-11-08 17:59:01,956 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6542056074766355 [2024-11-08 17:59:01,958 INFO L175 Difference]: Start difference. First operand has 98 places, 103 transitions, 224 flow. Second operand 3 states and 210 transitions. [2024-11-08 17:59:01,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 96 transitions, 306 flow [2024-11-08 17:59:01,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 96 transitions, 294 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 17:59:01,973 INFO L231 Difference]: Finished difference. Result has 87 places, 96 transitions, 202 flow [2024-11-08 17:59:01,975 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=87, PETRI_TRANSITIONS=96} [2024-11-08 17:59:01,981 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, -11 predicate places. [2024-11-08 17:59:01,981 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 96 transitions, 202 flow [2024-11-08 17:59:01,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:01,982 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:59:01,982 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 17:59:01,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 17:59:01,983 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 17:59:01,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:59:01,984 INFO L85 PathProgramCache]: Analyzing trace with hash 28011398, now seen corresponding path program 1 times [2024-11-08 17:59:01,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:59:01,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593275646] [2024-11-08 17:59:01,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:01,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:59:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:59:02,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:59:02,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593275646] [2024-11-08 17:59:02,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593275646] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:59:02,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:59:02,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:59:02,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059910912] [2024-11-08 17:59:02,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:59:02,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:59:02,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:59:02,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:59:02,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:59:02,592 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 107 [2024-11-08 17:59:02,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 96 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:02,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:59:02,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 107 [2024-11-08 17:59:02,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:59:03,354 INFO L124 PetriNetUnfolderBase]: 3116/5116 cut-off events. [2024-11-08 17:59:03,354 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-08 17:59:03,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9101 conditions, 5116 events. 3116/5116 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 35740 event pairs, 2134 based on Foata normal form. 1/3389 useless extension candidates. Maximal degree in co-relation 9050. Up to 3901 conditions per place. [2024-11-08 17:59:03,397 INFO L140 encePairwiseOnDemand]: 102/107 looper letters, 57 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2024-11-08 17:59:03,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 98 transitions, 324 flow [2024-11-08 17:59:03,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:59:03,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:59:03,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2024-11-08 17:59:03,400 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6230529595015576 [2024-11-08 17:59:03,400 INFO L175 Difference]: Start difference. First operand has 87 places, 96 transitions, 202 flow. Second operand 3 states and 200 transitions. [2024-11-08 17:59:03,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 98 transitions, 324 flow [2024-11-08 17:59:03,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 98 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:59:03,405 INFO L231 Difference]: Finished difference. Result has 88 places, 97 transitions, 214 flow [2024-11-08 17:59:03,407 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=88, PETRI_TRANSITIONS=97} [2024-11-08 17:59:03,408 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, -10 predicate places. [2024-11-08 17:59:03,408 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 97 transitions, 214 flow [2024-11-08 17:59:03,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:03,409 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:59:03,409 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-08 17:59:03,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 17:59:03,410 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 17:59:03,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:59:03,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1264803982, now seen corresponding path program 1 times [2024-11-08 17:59:03,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:59:03,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655338507] [2024-11-08 17:59:03,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:03,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:59:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:59:03,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:59:03,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655338507] [2024-11-08 17:59:03,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655338507] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:59:03,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487154950] [2024-11-08 17:59:03,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:03,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:59:03,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:59:03,875 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:59:03,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 17:59:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:03,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 17:59:03,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:59:04,060 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 [2024-11-08 17:59:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:59:04,423 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:59:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:59:04,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487154950] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:59:04,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:59:04,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-08 17:59:04,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427124214] [2024-11-08 17:59:04,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:59:04,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 17:59:04,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:59:04,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 17:59:04,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:59:05,459 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 107 [2024-11-08 17:59:05,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 97 transitions, 214 flow. Second operand has 12 states, 12 states have (on average 44.75) internal successors, (537), 12 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:05,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:59:05,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 107 [2024-11-08 17:59:05,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:59:06,744 INFO L124 PetriNetUnfolderBase]: 3117/5121 cut-off events. [2024-11-08 17:59:06,745 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-08 17:59:06,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9122 conditions, 5121 events. 3117/5121 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 35844 event pairs, 2134 based on Foata normal form. 1/3394 useless extension candidates. Maximal degree in co-relation 9107. Up to 3895 conditions per place. [2024-11-08 17:59:06,793 INFO L140 encePairwiseOnDemand]: 95/107 looper letters, 53 selfloop transitions, 15 changer transitions 0/104 dead transitions. [2024-11-08 17:59:06,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 104 transitions, 366 flow [2024-11-08 17:59:06,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 17:59:06,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 17:59:06,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 415 transitions. [2024-11-08 17:59:06,798 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4848130841121495 [2024-11-08 17:59:06,798 INFO L175 Difference]: Start difference. First operand has 88 places, 97 transitions, 214 flow. Second operand 8 states and 415 transitions. [2024-11-08 17:59:06,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 104 transitions, 366 flow [2024-11-08 17:59:06,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 104 transitions, 364 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 17:59:06,805 INFO L231 Difference]: Finished difference. Result has 94 places, 101 transitions, 256 flow [2024-11-08 17:59:06,805 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=256, PETRI_PLACES=94, PETRI_TRANSITIONS=101} [2024-11-08 17:59:06,806 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, -4 predicate places. [2024-11-08 17:59:06,806 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 101 transitions, 256 flow [2024-11-08 17:59:06,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 44.75) internal successors, (537), 12 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:06,807 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:59:06,807 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:59:06,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 17:59:07,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:59:07,013 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 17:59:07,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:59:07,013 INFO L85 PathProgramCache]: Analyzing trace with hash -879472, now seen corresponding path program 1 times [2024-11-08 17:59:07,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:59:07,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373981086] [2024-11-08 17:59:07,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:07,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:59:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:59:07,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:59:07,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373981086] [2024-11-08 17:59:07,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373981086] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:59:07,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852124371] [2024-11-08 17:59:07,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:07,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:59:07,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:59:07,314 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:59:07,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 17:59:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:07,396 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 17:59:07,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:59:07,411 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 [2024-11-08 17:59:07,558 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 17:59:07,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-08 17:59:07,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:59:07,599 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:59:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:59:07,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852124371] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 17:59:07,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:59:07,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-11-08 17:59:07,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690288676] [2024-11-08 17:59:07,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:59:07,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:59:07,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:59:07,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:59:07,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:59:07,965 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 107 [2024-11-08 17:59:07,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 101 transitions, 256 flow. Second operand has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:07,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:59:07,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 107 [2024-11-08 17:59:07,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:59:08,598 INFO L124 PetriNetUnfolderBase]: 3121/5133 cut-off events. [2024-11-08 17:59:08,598 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2024-11-08 17:59:08,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9152 conditions, 5133 events. 3121/5133 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 35859 event pairs, 2134 based on Foata normal form. 0/3409 useless extension candidates. Maximal degree in co-relation 9119. Up to 3896 conditions per place. [2024-11-08 17:59:08,638 INFO L140 encePairwiseOnDemand]: 98/107 looper letters, 52 selfloop transitions, 9 changer transitions 0/108 dead transitions. [2024-11-08 17:59:08,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 108 transitions, 396 flow [2024-11-08 17:59:08,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:59:08,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:59:08,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 268 transitions. [2024-11-08 17:59:08,640 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6261682242990654 [2024-11-08 17:59:08,640 INFO L175 Difference]: Start difference. First operand has 94 places, 101 transitions, 256 flow. Second operand 4 states and 268 transitions. [2024-11-08 17:59:08,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 108 transitions, 396 flow [2024-11-08 17:59:08,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 108 transitions, 372 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-08 17:59:08,644 INFO L231 Difference]: Finished difference. Result has 96 places, 105 transitions, 291 flow [2024-11-08 17:59:08,644 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=291, PETRI_PLACES=96, PETRI_TRANSITIONS=105} [2024-11-08 17:59:08,645 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, -2 predicate places. [2024-11-08 17:59:08,645 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 105 transitions, 291 flow [2024-11-08 17:59:08,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.2) internal successors, (266), 5 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:08,646 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:59:08,646 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:59:08,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 17:59:08,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:59:08,851 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 17:59:08,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:59:08,852 INFO L85 PathProgramCache]: Analyzing trace with hash -845917131, now seen corresponding path program 1 times [2024-11-08 17:59:08,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:59:08,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615363732] [2024-11-08 17:59:08,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:08,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:59:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:59:08,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:59:08,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615363732] [2024-11-08 17:59:08,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615363732] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:59:08,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:59:08,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:59:08,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335006198] [2024-11-08 17:59:08,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:59:08,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:59:08,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:59:08,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:59:08,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:59:09,021 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 107 [2024-11-08 17:59:09,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 105 transitions, 291 flow. Second operand has 4 states, 4 states have (on average 51.25) internal successors, (205), 4 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:09,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:59:09,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 107 [2024-11-08 17:59:09,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:59:09,653 INFO L124 PetriNetUnfolderBase]: 3117/5127 cut-off events. [2024-11-08 17:59:09,653 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2024-11-08 17:59:09,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9154 conditions, 5127 events. 3117/5127 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 35833 event pairs, 2134 based on Foata normal form. 2/3405 useless extension candidates. Maximal degree in co-relation 9116. Up to 3900 conditions per place. [2024-11-08 17:59:09,696 INFO L140 encePairwiseOnDemand]: 97/107 looper letters, 55 selfloop transitions, 8 changer transitions 0/106 dead transitions. [2024-11-08 17:59:09,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 106 transitions, 413 flow [2024-11-08 17:59:09,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:59:09,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:59:09,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 260 transitions. [2024-11-08 17:59:09,698 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6074766355140186 [2024-11-08 17:59:09,698 INFO L175 Difference]: Start difference. First operand has 96 places, 105 transitions, 291 flow. Second operand 4 states and 260 transitions. [2024-11-08 17:59:09,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 106 transitions, 413 flow [2024-11-08 17:59:09,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 106 transitions, 396 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-08 17:59:09,702 INFO L231 Difference]: Finished difference. Result has 97 places, 103 transitions, 296 flow [2024-11-08 17:59:09,702 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=296, PETRI_PLACES=97, PETRI_TRANSITIONS=103} [2024-11-08 17:59:09,703 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, -1 predicate places. [2024-11-08 17:59:09,703 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 103 transitions, 296 flow [2024-11-08 17:59:09,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.25) internal successors, (205), 4 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:09,704 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:59:09,704 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:59:09,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-08 17:59:09,704 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 17:59:09,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:59:09,705 INFO L85 PathProgramCache]: Analyzing trace with hash -429612377, now seen corresponding path program 1 times [2024-11-08 17:59:09,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:59:09,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393642383] [2024-11-08 17:59:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:09,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:59:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:09,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:59:09,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:59:09,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393642383] [2024-11-08 17:59:09,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393642383] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:59:09,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293514553] [2024-11-08 17:59:09,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:09,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:59:09,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:59:09,829 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:59:09,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 17:59:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:09,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 17:59:09,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:59:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:59:10,018 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:59:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:59:10,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293514553] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:59:10,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:59:10,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-08 17:59:10,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684896604] [2024-11-08 17:59:10,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:59:10,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 17:59:10,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:59:10,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 17:59:10,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-08 17:59:10,507 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 107 [2024-11-08 17:59:10,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 103 transitions, 296 flow. Second operand has 14 states, 14 states have (on average 48.142857142857146) internal successors, (674), 14 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:10,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:59:10,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 107 [2024-11-08 17:59:10,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:59:12,157 INFO L124 PetriNetUnfolderBase]: 6230/10244 cut-off events. [2024-11-08 17:59:12,157 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2024-11-08 17:59:12,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18290 conditions, 10244 events. 6230/10244 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 74760 event pairs, 4268 based on Foata normal form. 2/6827 useless extension candidates. Maximal degree in co-relation 9162. Up to 3889 conditions per place. [2024-11-08 17:59:12,272 INFO L140 encePairwiseOnDemand]: 91/107 looper letters, 97 selfloop transitions, 37 changer transitions 0/172 dead transitions. [2024-11-08 17:59:12,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 172 transitions, 751 flow [2024-11-08 17:59:12,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 17:59:12,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-08 17:59:12,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 642 transitions. [2024-11-08 17:59:12,275 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-11-08 17:59:12,276 INFO L175 Difference]: Start difference. First operand has 97 places, 103 transitions, 296 flow. Second operand 11 states and 642 transitions. [2024-11-08 17:59:12,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 172 transitions, 751 flow [2024-11-08 17:59:12,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 172 transitions, 725 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 17:59:12,281 INFO L231 Difference]: Finished difference. Result has 106 places, 122 transitions, 455 flow [2024-11-08 17:59:12,282 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=455, PETRI_PLACES=106, PETRI_TRANSITIONS=122} [2024-11-08 17:59:12,282 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 8 predicate places. [2024-11-08 17:59:12,283 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 122 transitions, 455 flow [2024-11-08 17:59:12,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 48.142857142857146) internal successors, (674), 14 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:12,283 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:59:12,284 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-08 17:59:12,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 17:59:12,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:59:12,485 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 17:59:12,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:59:12,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1451552849, now seen corresponding path program 2 times [2024-11-08 17:59:12,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:59:12,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111204589] [2024-11-08 17:59:12,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:12,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:59:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:59:12,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:59:12,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111204589] [2024-11-08 17:59:12,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111204589] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:59:12,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716424514] [2024-11-08 17:59:12,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:59:12,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:59:12,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:59:12,881 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:59:12,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 17:59:12,969 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:59:12,969 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:59:12,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-08 17:59:12,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:59:12,991 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 [2024-11-08 17:59:13,185 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 17:59:13,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-08 17:59:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:59:13,312 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:59:13,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:59:13,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716424514] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:59:13,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:59:13,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-11-08 17:59:13,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041755711] [2024-11-08 17:59:13,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:59:13,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 17:59:13,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:59:13,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 17:59:13,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-11-08 17:59:15,818 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 107 [2024-11-08 17:59:15,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 122 transitions, 455 flow. Second operand has 20 states, 20 states have (on average 45.25) internal successors, (905), 20 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:15,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:59:15,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 107 [2024-11-08 17:59:15,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:59:20,441 INFO L124 PetriNetUnfolderBase]: 15557/25566 cut-off events. [2024-11-08 17:59:20,441 INFO L125 PetriNetUnfolderBase]: For 359/359 co-relation queries the response was YES. [2024-11-08 17:59:20,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45673 conditions, 25566 events. 15557/25566 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 206196 event pairs, 10670 based on Foata normal form. 18/17074 useless extension candidates. Maximal degree in co-relation 36500. Up to 7784 conditions per place. [2024-11-08 17:59:20,626 INFO L140 encePairwiseOnDemand]: 89/107 looper letters, 171 selfloop transitions, 34 changer transitions 12/253 dead transitions. [2024-11-08 17:59:20,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 253 transitions, 1334 flow [2024-11-08 17:59:20,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 17:59:20,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-08 17:59:20,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 866 transitions. [2024-11-08 17:59:20,629 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5395638629283489 [2024-11-08 17:59:20,629 INFO L175 Difference]: Start difference. First operand has 106 places, 122 transitions, 455 flow. Second operand 15 states and 866 transitions. [2024-11-08 17:59:20,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 253 transitions, 1334 flow [2024-11-08 17:59:20,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 253 transitions, 1236 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-11-08 17:59:20,638 INFO L231 Difference]: Finished difference. Result has 121 places, 131 transitions, 595 flow [2024-11-08 17:59:20,638 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=595, PETRI_PLACES=121, PETRI_TRANSITIONS=131} [2024-11-08 17:59:20,639 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 23 predicate places. [2024-11-08 17:59:20,639 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 131 transitions, 595 flow [2024-11-08 17:59:20,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 45.25) internal successors, (905), 20 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:20,640 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:59:20,640 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:59:20,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 17:59:20,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:59:20,842 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 17:59:20,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:59:20,842 INFO L85 PathProgramCache]: Analyzing trace with hash -545846105, now seen corresponding path program 1 times [2024-11-08 17:59:20,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:59:20,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959141052] [2024-11-08 17:59:20,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:20,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:59:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:59:21,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:59:21,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959141052] [2024-11-08 17:59:21,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959141052] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:59:21,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:59:21,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:59:21,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101987071] [2024-11-08 17:59:21,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:59:21,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:59:21,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:59:21,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:59:21,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:59:21,235 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 107 [2024-11-08 17:59:21,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 131 transitions, 595 flow. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:21,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:59:21,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 107 [2024-11-08 17:59:21,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:59:24,247 INFO L124 PetriNetUnfolderBase]: 15712/26661 cut-off events. [2024-11-08 17:59:24,247 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-11-08 17:59:24,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47009 conditions, 26661 events. 15712/26661 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 1196. Compared 222767 event pairs, 10940 based on Foata normal form. 0/17906 useless extension candidates. Maximal degree in co-relation 37626. Up to 19680 conditions per place. [2024-11-08 17:59:24,411 INFO L140 encePairwiseOnDemand]: 99/107 looper letters, 65 selfloop transitions, 9 changer transitions 0/126 dead transitions. [2024-11-08 17:59:24,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 126 transitions, 733 flow [2024-11-08 17:59:24,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:59:24,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:59:24,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 284 transitions. [2024-11-08 17:59:24,413 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5308411214953271 [2024-11-08 17:59:24,413 INFO L175 Difference]: Start difference. First operand has 121 places, 131 transitions, 595 flow. Second operand 5 states and 284 transitions. [2024-11-08 17:59:24,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 126 transitions, 733 flow [2024-11-08 17:59:24,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 126 transitions, 698 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-08 17:59:24,418 INFO L231 Difference]: Finished difference. Result has 114 places, 126 transitions, 568 flow [2024-11-08 17:59:24,419 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=568, PETRI_PLACES=114, PETRI_TRANSITIONS=126} [2024-11-08 17:59:24,422 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 16 predicate places. [2024-11-08 17:59:24,423 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 126 transitions, 568 flow [2024-11-08 17:59:24,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:24,423 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:59:24,423 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:59:24,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 17:59:24,424 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 17:59:24,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:59:24,424 INFO L85 PathProgramCache]: Analyzing trace with hash -545846104, now seen corresponding path program 1 times [2024-11-08 17:59:24,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:59:24,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189201861] [2024-11-08 17:59:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:24,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:59:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:59:24,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:59:24,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189201861] [2024-11-08 17:59:24,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189201861] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:59:24,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942812316] [2024-11-08 17:59:24,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:24,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:59:24,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:59:24,985 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:59:24,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 17:59:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:25,080 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-08 17:59:25,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:59:25,091 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 [2024-11-08 17:59:25,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 17:59:25,186 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 17:59:25,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-08 17:59:25,211 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 17:59:25,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 17:59:25,405 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-08 17:59:25,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2024-11-08 17:59:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:59:25,833 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:59:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:59:26,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942812316] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 17:59:26,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:59:26,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 14 [2024-11-08 17:59:26,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499300627] [2024-11-08 17:59:26,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:59:26,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 17:59:26,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:59:26,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 17:59:26,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2024-11-08 17:59:28,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:59:29,003 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 107 [2024-11-08 17:59:29,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 126 transitions, 568 flow. Second operand has 6 states, 6 states have (on average 52.833333333333336) internal successors, (317), 6 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:29,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:59:29,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 107 [2024-11-08 17:59:29,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:59:31,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:59:33,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:59:36,217 INFO L124 PetriNetUnfolderBase]: 15697/25436 cut-off events. [2024-11-08 17:59:36,218 INFO L125 PetriNetUnfolderBase]: For 390/390 co-relation queries the response was YES. [2024-11-08 17:59:36,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45911 conditions, 25436 events. 15697/25436 cut-off events. For 390/390 co-relation queries the response was YES. Maximal size of possible extension queue 1169. Compared 204572 event pairs, 11065 based on Foata normal form. 0/16466 useless extension candidates. Maximal degree in co-relation 36745. Up to 19815 conditions per place. [2024-11-08 17:59:36,579 INFO L140 encePairwiseOnDemand]: 101/107 looper letters, 63 selfloop transitions, 12 changer transitions 0/125 dead transitions. [2024-11-08 17:59:36,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 125 transitions, 716 flow [2024-11-08 17:59:36,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:59:36,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 17:59:36,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 359 transitions. [2024-11-08 17:59:36,582 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.559190031152648 [2024-11-08 17:59:36,582 INFO L175 Difference]: Start difference. First operand has 114 places, 126 transitions, 568 flow. Second operand 6 states and 359 transitions. [2024-11-08 17:59:36,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 125 transitions, 716 flow [2024-11-08 17:59:36,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 125 transitions, 703 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 17:59:36,588 INFO L231 Difference]: Finished difference. Result has 114 places, 124 transitions, 575 flow [2024-11-08 17:59:36,588 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=575, PETRI_PLACES=114, PETRI_TRANSITIONS=124} [2024-11-08 17:59:36,589 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 16 predicate places. [2024-11-08 17:59:36,589 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 124 transitions, 575 flow [2024-11-08 17:59:36,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 52.833333333333336) internal successors, (317), 6 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:36,590 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:59:36,590 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2024-11-08 17:59:36,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 17:59:36,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:59:36,795 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 17:59:36,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:59:36,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1479254232, now seen corresponding path program 3 times [2024-11-08 17:59:36,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:59:36,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120191203] [2024-11-08 17:59:36,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:36,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:59:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:59:37,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:59:37,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120191203] [2024-11-08 17:59:37,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120191203] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:59:37,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564149059] [2024-11-08 17:59:37,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 17:59:37,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:59:37,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:59:37,020 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:59:37,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 17:59:37,117 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-08 17:59:37,118 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:59:37,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 17:59:37,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:59:37,134 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 [2024-11-08 17:59:37,359 INFO L349 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2024-11-08 17:59:37,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2024-11-08 17:59:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 17:59:37,575 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:59:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 17:59:37,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564149059] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:59:37,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:59:37,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2024-11-08 17:59:37,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351980480] [2024-11-08 17:59:37,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:59:37,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 17:59:37,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:59:37,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 17:59:37,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-08 17:59:39,881 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 107 [2024-11-08 17:59:39,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 124 transitions, 575 flow. Second operand has 21 states, 21 states have (on average 45.19047619047619) internal successors, (949), 21 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:39,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:59:39,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 107 [2024-11-08 17:59:39,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:59:44,637 INFO L124 PetriNetUnfolderBase]: 14020/23024 cut-off events. [2024-11-08 17:59:44,637 INFO L125 PetriNetUnfolderBase]: For 347/347 co-relation queries the response was YES. [2024-11-08 17:59:44,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41130 conditions, 23024 events. 14020/23024 cut-off events. For 347/347 co-relation queries the response was YES. Maximal size of possible extension queue 1026. Compared 183984 event pairs, 9560 based on Foata normal form. 6/15500 useless extension candidates. Maximal degree in co-relation 32950. Up to 13996 conditions per place. [2024-11-08 17:59:44,779 INFO L140 encePairwiseOnDemand]: 91/107 looper letters, 97 selfloop transitions, 56 changer transitions 0/183 dead transitions. [2024-11-08 17:59:44,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 183 transitions, 1018 flow [2024-11-08 17:59:44,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-08 17:59:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-08 17:59:44,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1148 transitions. [2024-11-08 17:59:44,783 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46647704185290534 [2024-11-08 17:59:44,783 INFO L175 Difference]: Start difference. First operand has 114 places, 124 transitions, 575 flow. Second operand 23 states and 1148 transitions. [2024-11-08 17:59:44,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 183 transitions, 1018 flow [2024-11-08 17:59:44,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 183 transitions, 973 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-11-08 17:59:44,793 INFO L231 Difference]: Finished difference. Result has 127 places, 131 transitions, 685 flow [2024-11-08 17:59:44,793 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=685, PETRI_PLACES=127, PETRI_TRANSITIONS=131} [2024-11-08 17:59:44,794 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 29 predicate places. [2024-11-08 17:59:44,794 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 131 transitions, 685 flow [2024-11-08 17:59:44,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 45.19047619047619) internal successors, (949), 21 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:44,795 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:59:44,795 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:59:44,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 17:59:44,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:59:44,996 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 17:59:44,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:59:44,996 INFO L85 PathProgramCache]: Analyzing trace with hash 258640893, now seen corresponding path program 1 times [2024-11-08 17:59:44,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:59:44,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464801707] [2024-11-08 17:59:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:44,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:59:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:59:45,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:59:45,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464801707] [2024-11-08 17:59:45,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464801707] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:59:45,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:59:45,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:59:45,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172410042] [2024-11-08 17:59:45,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:59:45,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:59:45,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:59:45,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:59:45,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:59:45,224 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 107 [2024-11-08 17:59:45,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 131 transitions, 685 flow. Second operand has 5 states, 5 states have (on average 49.4) internal successors, (247), 5 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:45,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:59:45,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 107 [2024-11-08 17:59:45,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:59:47,366 INFO L124 PetriNetUnfolderBase]: 14195/22584 cut-off events. [2024-11-08 17:59:47,366 INFO L125 PetriNetUnfolderBase]: For 370/370 co-relation queries the response was YES. [2024-11-08 17:59:47,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41415 conditions, 22584 events. 14195/22584 cut-off events. For 370/370 co-relation queries the response was YES. Maximal size of possible extension queue 1041. Compared 173888 event pairs, 10160 based on Foata normal form. 0/15674 useless extension candidates. Maximal degree in co-relation 24715. Up to 18200 conditions per place. [2024-11-08 17:59:47,507 INFO L140 encePairwiseOnDemand]: 99/107 looper letters, 61 selfloop transitions, 9 changer transitions 0/126 dead transitions. [2024-11-08 17:59:47,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 126 transitions, 815 flow [2024-11-08 17:59:47,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:59:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:59:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 287 transitions. [2024-11-08 17:59:47,510 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5364485981308411 [2024-11-08 17:59:47,510 INFO L175 Difference]: Start difference. First operand has 127 places, 131 transitions, 685 flow. Second operand 5 states and 287 transitions. [2024-11-08 17:59:47,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 126 transitions, 815 flow [2024-11-08 17:59:47,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 126 transitions, 634 flow, removed 33 selfloop flow, removed 14 redundant places. [2024-11-08 17:59:47,517 INFO L231 Difference]: Finished difference. Result has 112 places, 126 transitions, 512 flow [2024-11-08 17:59:47,517 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=512, PETRI_PLACES=112, PETRI_TRANSITIONS=126} [2024-11-08 17:59:47,518 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 14 predicate places. [2024-11-08 17:59:47,518 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 126 transitions, 512 flow [2024-11-08 17:59:47,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.4) internal successors, (247), 5 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:47,519 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:59:47,519 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:59:47,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-08 17:59:47,519 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 17:59:47,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:59:47,520 INFO L85 PathProgramCache]: Analyzing trace with hash 258640894, now seen corresponding path program 1 times [2024-11-08 17:59:47,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:59:47,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10570898] [2024-11-08 17:59:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:47,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:59:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:59:47,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:59:47,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10570898] [2024-11-08 17:59:47,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10570898] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:59:47,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168198205] [2024-11-08 17:59:47,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:47,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:59:47,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:59:47,844 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:59:47,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 17:59:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:47,950 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 17:59:47,952 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:59:47,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 17:59:48,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:59:48,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 17:59:48,032 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 17:59:48,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 17:59:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:59:48,086 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:59:48,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-08 17:59:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:59:48,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168198205] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:59:48,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:59:48,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2024-11-08 17:59:48,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655715759] [2024-11-08 17:59:48,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:59:48,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 17:59:48,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:59:48,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 17:59:48,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-08 17:59:49,301 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 107 [2024-11-08 17:59:49,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 126 transitions, 512 flow. Second operand has 11 states, 11 states have (on average 52.36363636363637) internal successors, (576), 11 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:49,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:59:49,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 107 [2024-11-08 17:59:49,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:59:51,190 INFO L124 PetriNetUnfolderBase]: 9990/16427 cut-off events. [2024-11-08 17:59:51,190 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2024-11-08 17:59:51,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29333 conditions, 16427 events. 9990/16427 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 124733 event pairs, 6760 based on Foata normal form. 0/11219 useless extension candidates. Maximal degree in co-relation 7352. Up to 12465 conditions per place. [2024-11-08 17:59:51,262 INFO L140 encePairwiseOnDemand]: 98/107 looper letters, 53 selfloop transitions, 19 changer transitions 0/127 dead transitions. [2024-11-08 17:59:51,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 127 transitions, 658 flow [2024-11-08 17:59:51,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 17:59:51,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 17:59:51,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 454 transitions. [2024-11-08 17:59:51,264 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.530373831775701 [2024-11-08 17:59:51,265 INFO L175 Difference]: Start difference. First operand has 112 places, 126 transitions, 512 flow. Second operand 8 states and 454 transitions. [2024-11-08 17:59:51,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 127 transitions, 658 flow [2024-11-08 17:59:51,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 127 transitions, 645 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 17:59:51,269 INFO L231 Difference]: Finished difference. Result has 114 places, 124 transitions, 533 flow [2024-11-08 17:59:51,269 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=533, PETRI_PLACES=114, PETRI_TRANSITIONS=124} [2024-11-08 17:59:51,269 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 16 predicate places. [2024-11-08 17:59:51,270 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 124 transitions, 533 flow [2024-11-08 17:59:51,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 52.36363636363637) internal successors, (576), 11 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:51,270 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:59:51,270 INFO L204 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] [2024-11-08 17:59:51,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 17:59:51,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-08 17:59:51,471 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 17:59:51,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:59:51,471 INFO L85 PathProgramCache]: Analyzing trace with hash 990982559, now seen corresponding path program 1 times [2024-11-08 17:59:51,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:59:51,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277514467] [2024-11-08 17:59:51,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:51,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:59:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:59:51,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:59:51,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277514467] [2024-11-08 17:59:51,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277514467] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:59:51,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872128345] [2024-11-08 17:59:51,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:51,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:59:51,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:59:51,604 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:59:51,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 17:59:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:51,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 17:59:51,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:59:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:59:51,793 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:59:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:59:51,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872128345] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:59:51,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:59:51,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-08 17:59:51,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009351022] [2024-11-08 17:59:51,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:59:51,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 17:59:51,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:59:51,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 17:59:51,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:59:52,166 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 107 [2024-11-08 17:59:52,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 124 transitions, 533 flow. Second operand has 12 states, 12 states have (on average 45.083333333333336) internal successors, (541), 12 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:52,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:59:52,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 107 [2024-11-08 17:59:52,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:59:53,979 INFO L124 PetriNetUnfolderBase]: 9566/15487 cut-off events. [2024-11-08 17:59:53,979 INFO L125 PetriNetUnfolderBase]: For 146/146 co-relation queries the response was YES. [2024-11-08 17:59:54,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28223 conditions, 15487 events. 9566/15487 cut-off events. For 146/146 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 111832 event pairs, 5316 based on Foata normal form. 0/10599 useless extension candidates. Maximal degree in co-relation 10259. Up to 7836 conditions per place. [2024-11-08 17:59:54,179 INFO L140 encePairwiseOnDemand]: 90/107 looper letters, 140 selfloop transitions, 40 changer transitions 0/200 dead transitions. [2024-11-08 17:59:54,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 200 transitions, 1055 flow [2024-11-08 17:59:54,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 17:59:54,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 17:59:54,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 577 transitions. [2024-11-08 17:59:54,181 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5392523364485982 [2024-11-08 17:59:54,181 INFO L175 Difference]: Start difference. First operand has 114 places, 124 transitions, 533 flow. Second operand 10 states and 577 transitions. [2024-11-08 17:59:54,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 200 transitions, 1055 flow [2024-11-08 17:59:54,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 200 transitions, 1028 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-08 17:59:54,185 INFO L231 Difference]: Finished difference. Result has 121 places, 127 transitions, 630 flow [2024-11-08 17:59:54,185 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=630, PETRI_PLACES=121, PETRI_TRANSITIONS=127} [2024-11-08 17:59:54,186 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 23 predicate places. [2024-11-08 17:59:54,186 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 127 transitions, 630 flow [2024-11-08 17:59:54,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 45.083333333333336) internal successors, (541), 12 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:54,186 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:59:54,186 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:59:54,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-08 17:59:54,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-08 17:59:54,387 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 17:59:54,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:59:54,388 INFO L85 PathProgramCache]: Analyzing trace with hash 360787511, now seen corresponding path program 1 times [2024-11-08 17:59:54,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:59:54,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655192386] [2024-11-08 17:59:54,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:54,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:59:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:59:54,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:59:54,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655192386] [2024-11-08 17:59:54,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655192386] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:59:54,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144723844] [2024-11-08 17:59:54,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:54,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:59:54,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:59:54,524 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:59:54,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 17:59:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:54,642 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 17:59:54,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:59:54,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:59:54,732 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:59:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:59:54,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144723844] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:59:54,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:59:54,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-08 17:59:54,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339156342] [2024-11-08 17:59:54,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:59:54,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 17:59:54,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:59:54,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 17:59:54,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:59:55,055 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 107 [2024-11-08 17:59:55,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 127 transitions, 630 flow. Second operand has 12 states, 12 states have (on average 45.333333333333336) internal successors, (544), 12 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:55,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:59:55,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 107 [2024-11-08 17:59:55,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:59:56,438 INFO L124 PetriNetUnfolderBase]: 8024/11951 cut-off events. [2024-11-08 17:59:56,438 INFO L125 PetriNetUnfolderBase]: For 2389/2389 co-relation queries the response was YES. [2024-11-08 17:59:56,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24120 conditions, 11951 events. 8024/11951 cut-off events. For 2389/2389 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 75234 event pairs, 4952 based on Foata normal form. 0/8479 useless extension candidates. Maximal degree in co-relation 10334. Up to 8292 conditions per place. [2024-11-08 17:59:56,496 INFO L140 encePairwiseOnDemand]: 90/107 looper letters, 127 selfloop transitions, 40 changer transitions 0/188 dead transitions. [2024-11-08 17:59:56,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 188 transitions, 1109 flow [2024-11-08 17:59:56,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 17:59:56,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 17:59:56,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 564 transitions. [2024-11-08 17:59:56,498 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5271028037383177 [2024-11-08 17:59:56,499 INFO L175 Difference]: Start difference. First operand has 121 places, 127 transitions, 630 flow. Second operand 10 states and 564 transitions. [2024-11-08 17:59:56,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 188 transitions, 1109 flow [2024-11-08 17:59:56,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 188 transitions, 1064 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-08 17:59:56,507 INFO L231 Difference]: Finished difference. Result has 128 places, 130 transitions, 709 flow [2024-11-08 17:59:56,508 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=709, PETRI_PLACES=128, PETRI_TRANSITIONS=130} [2024-11-08 17:59:56,508 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 30 predicate places. [2024-11-08 17:59:56,508 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 130 transitions, 709 flow [2024-11-08 17:59:56,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 45.333333333333336) internal successors, (544), 12 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:56,509 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:59:56,509 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:59:56,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-08 17:59:56,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 17:59:56,710 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 17:59:56,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:59:56,710 INFO L85 PathProgramCache]: Analyzing trace with hash -945589683, now seen corresponding path program 1 times [2024-11-08 17:59:56,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:59:56,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258661205] [2024-11-08 17:59:56,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:56,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:59:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:59:56,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:59:56,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258661205] [2024-11-08 17:59:56,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258661205] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:59:56,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290587782] [2024-11-08 17:59:56,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:56,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:59:56,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:59:56,850 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:59:56,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 17:59:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:56,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-08 17:59:56,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:59:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:59:57,043 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:59:57,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:59:57,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290587782] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:59:57,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:59:57,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-08 17:59:57,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86395341] [2024-11-08 17:59:57,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:59:57,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 17:59:57,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:59:57,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 17:59:57,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:59:57,283 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 107 [2024-11-08 17:59:57,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 130 transitions, 709 flow. Second operand has 12 states, 12 states have (on average 45.5) internal successors, (546), 12 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:57,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:59:57,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 107 [2024-11-08 17:59:57,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:59:58,818 INFO L124 PetriNetUnfolderBase]: 7316/10871 cut-off events. [2024-11-08 17:59:58,818 INFO L125 PetriNetUnfolderBase]: For 3447/3447 co-relation queries the response was YES. [2024-11-08 17:59:58,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22992 conditions, 10871 events. 7316/10871 cut-off events. For 3447/3447 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 69792 event pairs, 4004 based on Foata normal form. 0/7735 useless extension candidates. Maximal degree in co-relation 10500. Up to 7148 conditions per place. [2024-11-08 17:59:58,877 INFO L140 encePairwiseOnDemand]: 91/107 looper letters, 121 selfloop transitions, 38 changer transitions 0/181 dead transitions. [2024-11-08 17:59:58,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 181 transitions, 1165 flow [2024-11-08 17:59:58,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 17:59:58,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 17:59:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 556 transitions. [2024-11-08 17:59:58,880 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5196261682242991 [2024-11-08 17:59:58,880 INFO L175 Difference]: Start difference. First operand has 128 places, 130 transitions, 709 flow. Second operand 10 states and 556 transitions. [2024-11-08 17:59:58,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 181 transitions, 1165 flow [2024-11-08 17:59:58,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 181 transitions, 1120 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-08 17:59:58,891 INFO L231 Difference]: Finished difference. Result has 135 places, 132 transitions, 779 flow [2024-11-08 17:59:58,892 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=779, PETRI_PLACES=135, PETRI_TRANSITIONS=132} [2024-11-08 17:59:58,892 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 37 predicate places. [2024-11-08 17:59:58,892 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 132 transitions, 779 flow [2024-11-08 17:59:58,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 45.5) internal successors, (546), 12 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:59:58,893 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:59:58,893 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:59:58,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 17:59:59,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-08 17:59:59,094 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 17:59:59,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:59:59,094 INFO L85 PathProgramCache]: Analyzing trace with hash -46798555, now seen corresponding path program 2 times [2024-11-08 17:59:59,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:59:59,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103871716] [2024-11-08 17:59:59,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:59:59,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:59:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:59:59,866 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 17:59:59,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:59:59,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103871716] [2024-11-08 17:59:59,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103871716] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:59:59,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726825091] [2024-11-08 17:59:59,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:59:59,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:59:59,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:59:59,869 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:59:59,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 17:59:59,998 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-08 17:59:59,999 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:00:00,000 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-08 18:00:00,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:00:00,013 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 [2024-11-08 18:00:00,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:00:00,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:00:00,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-08 18:00:00,176 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:00:00,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 18:00:00,395 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 18:00:00,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-08 18:00:00,708 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 18:00:00,708 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:00:00,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726825091] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:00:00,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 18:00:00,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 14 [2024-11-08 18:00:00,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666361607] [2024-11-08 18:00:00,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:00:00,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 18:00:00,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:00:00,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 18:00:00,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-11-08 18:00:01,139 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 107 [2024-11-08 18:00:01,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 132 transitions, 779 flow. Second operand has 8 states, 8 states have (on average 46.375) internal successors, (371), 8 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:00:01,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:00:01,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 107 [2024-11-08 18:00:01,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:00:04,144 INFO L124 PetriNetUnfolderBase]: 14374/22749 cut-off events. [2024-11-08 18:00:04,144 INFO L125 PetriNetUnfolderBase]: For 5447/5447 co-relation queries the response was YES. [2024-11-08 18:00:04,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48787 conditions, 22749 events. 14374/22749 cut-off events. For 5447/5447 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 175048 event pairs, 3080 based on Foata normal form. 0/16465 useless extension candidates. Maximal degree in co-relation 24351. Up to 11768 conditions per place. [2024-11-08 18:00:04,318 INFO L140 encePairwiseOnDemand]: 97/107 looper letters, 116 selfloop transitions, 17 changer transitions 0/185 dead transitions. [2024-11-08 18:00:04,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 185 transitions, 1189 flow [2024-11-08 18:00:04,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 18:00:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 18:00:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 456 transitions. [2024-11-08 18:00:04,320 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5327102803738317 [2024-11-08 18:00:04,321 INFO L175 Difference]: Start difference. First operand has 135 places, 132 transitions, 779 flow. Second operand 8 states and 456 transitions. [2024-11-08 18:00:04,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 185 transitions, 1189 flow [2024-11-08 18:00:04,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 185 transitions, 1144 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-08 18:00:04,382 INFO L231 Difference]: Finished difference. Result has 139 places, 136 transitions, 802 flow [2024-11-08 18:00:04,383 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=802, PETRI_PLACES=139, PETRI_TRANSITIONS=136} [2024-11-08 18:00:04,383 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 41 predicate places. [2024-11-08 18:00:04,384 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 136 transitions, 802 flow [2024-11-08 18:00:04,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 46.375) internal successors, (371), 8 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:00:04,384 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:00:04,384 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:00:04,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-08 18:00:04,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-08 18:00:04,589 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 18:00:04,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:00:04,590 INFO L85 PathProgramCache]: Analyzing trace with hash -514450367, now seen corresponding path program 1 times [2024-11-08 18:00:04,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:00:04,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265292981] [2024-11-08 18:00:04,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:00:04,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:00:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:00:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 18:00:05,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:00:05,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265292981] [2024-11-08 18:00:05,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265292981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:00:05,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666117325] [2024-11-08 18:00:05,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:00:05,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:00:05,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:00:05,085 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:00:05,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 18:00:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:00:05,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 18:00:05,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:00:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 18:00:05,516 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:00:05,661 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 [2024-11-08 18:00:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 18:00:05,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666117325] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:00:05,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:00:05,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 19 [2024-11-08 18:00:05,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773889077] [2024-11-08 18:00:05,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:00:05,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 18:00:05,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:00:05,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 18:00:05,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2024-11-08 18:00:07,464 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 107 [2024-11-08 18:00:07,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 136 transitions, 802 flow. Second operand has 20 states, 20 states have (on average 47.9) internal successors, (958), 20 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:00:07,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:00:07,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 107 [2024-11-08 18:00:07,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:00:12,104 INFO L124 PetriNetUnfolderBase]: 21021/30073 cut-off events. [2024-11-08 18:00:12,104 INFO L125 PetriNetUnfolderBase]: For 19273/23027 co-relation queries the response was YES. [2024-11-08 18:00:12,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72413 conditions, 30073 events. 21021/30073 cut-off events. For 19273/23027 co-relation queries the response was YES. Maximal size of possible extension queue 1244. Compared 206338 event pairs, 7832 based on Foata normal form. 2/22690 useless extension candidates. Maximal degree in co-relation 35739. Up to 14624 conditions per place. [2024-11-08 18:00:12,352 INFO L140 encePairwiseOnDemand]: 94/107 looper letters, 160 selfloop transitions, 32 changer transitions 0/218 dead transitions. [2024-11-08 18:00:12,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 218 transitions, 1469 flow [2024-11-08 18:00:12,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 18:00:12,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-08 18:00:12,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 723 transitions. [2024-11-08 18:00:12,354 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5197699496764917 [2024-11-08 18:00:12,354 INFO L175 Difference]: Start difference. First operand has 139 places, 136 transitions, 802 flow. Second operand 13 states and 723 transitions. [2024-11-08 18:00:12,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 218 transitions, 1469 flow [2024-11-08 18:00:12,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 218 transitions, 1447 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-08 18:00:12,519 INFO L231 Difference]: Finished difference. Result has 149 places, 141 transitions, 892 flow [2024-11-08 18:00:12,520 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=892, PETRI_PLACES=149, PETRI_TRANSITIONS=141} [2024-11-08 18:00:12,521 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 51 predicate places. [2024-11-08 18:00:12,521 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 141 transitions, 892 flow [2024-11-08 18:00:12,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 47.9) internal successors, (958), 20 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:00:12,522 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:00:12,522 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:00:12,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-08 18:00:12,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-08 18:00:12,727 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 18:00:12,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:00:12,728 INFO L85 PathProgramCache]: Analyzing trace with hash -2023709879, now seen corresponding path program 1 times [2024-11-08 18:00:12,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:00:12,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775263982] [2024-11-08 18:00:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:00:12,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:00:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:00:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 18:00:13,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:00:13,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775263982] [2024-11-08 18:00:13,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775263982] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:00:13,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361853926] [2024-11-08 18:00:13,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:00:13,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:00:13,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:00:13,397 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:00:13,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 18:00:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:00:13,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-08 18:00:13,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:00:13,580 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 [2024-11-08 18:00:13,684 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-08 18:00:13,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-11-08 18:00:14,316 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 18:00:14,316 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:00:14,761 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 18:00:14,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361853926] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 18:00:14,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 18:00:14,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8] total 23 [2024-11-08 18:00:14,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253017484] [2024-11-08 18:00:14,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:00:14,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 18:00:14,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:00:14,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 18:00:14,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2024-11-08 18:00:15,144 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 107 [2024-11-08 18:00:15,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 141 transitions, 892 flow. Second operand has 8 states, 8 states have (on average 54.375) internal successors, (435), 8 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:00:15,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:00:15,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 107 [2024-11-08 18:00:15,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:00:19,436 INFO L124 PetriNetUnfolderBase]: 18723/28583 cut-off events. [2024-11-08 18:00:19,437 INFO L125 PetriNetUnfolderBase]: For 23645/23659 co-relation queries the response was YES. [2024-11-08 18:00:19,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73060 conditions, 28583 events. 18723/28583 cut-off events. For 23645/23659 co-relation queries the response was YES. Maximal size of possible extension queue 1291. Compared 219549 event pairs, 5692 based on Foata normal form. 14/22190 useless extension candidates. Maximal degree in co-relation 36262. Up to 14136 conditions per place. [2024-11-08 18:00:19,678 INFO L140 encePairwiseOnDemand]: 96/107 looper letters, 109 selfloop transitions, 23 changer transitions 0/188 dead transitions. [2024-11-08 18:00:19,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 188 transitions, 1331 flow [2024-11-08 18:00:19,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 18:00:19,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 18:00:19,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 566 transitions. [2024-11-08 18:00:19,680 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5877466251298027 [2024-11-08 18:00:19,681 INFO L175 Difference]: Start difference. First operand has 149 places, 141 transitions, 892 flow. Second operand 9 states and 566 transitions. [2024-11-08 18:00:19,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 188 transitions, 1331 flow [2024-11-08 18:00:19,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 188 transitions, 1295 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-08 18:00:19,787 INFO L231 Difference]: Finished difference. Result has 151 places, 144 transitions, 954 flow [2024-11-08 18:00:19,787 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=954, PETRI_PLACES=151, PETRI_TRANSITIONS=144} [2024-11-08 18:00:19,788 INFO L277 CegarLoopForPetriNet]: 98 programPoint places, 53 predicate places. [2024-11-08 18:00:19,788 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 144 transitions, 954 flow [2024-11-08 18:00:19,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 54.375) internal successors, (435), 8 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:00:19,788 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:00:19,788 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:00:19,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-08 18:00:19,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 18:00:19,989 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-08 18:00:19,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:00:19,990 INFO L85 PathProgramCache]: Analyzing trace with hash -514450371, now seen corresponding path program 2 times [2024-11-08 18:00:19,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:00:19,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456559980] [2024-11-08 18:00:19,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:00:19,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:00:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:00:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 18:00:20,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:00:20,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456559980] [2024-11-08 18:00:20,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456559980] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:00:20,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796877504] [2024-11-08 18:00:20,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:00:20,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:00:20,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:00:20,745 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:00:20,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db6c8a7-87ec-4de5-bf31-aecda3b95a00/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 18:00:20,893 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-08 18:00:20,893 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:00:20,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-08 18:00:20,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:00:20,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:00:20,919 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 [2024-11-08 18:00:21,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:00:21,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-08 18:00:21,265 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:00:21,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 18:00:21,426 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-08 18:00:21,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2024-11-08 18:00:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-08 18:00:22,027 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:00:22,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796877504] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:00:22,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 18:00:22,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 15 [2024-11-08 18:00:22,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88277963] [2024-11-08 18:00:22,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:00:22,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 18:00:22,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:00:22,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 18:00:22,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-11-08 18:00:22,705 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 107 [2024-11-08 18:00:22,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 144 transitions, 954 flow. Second operand has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:00:22,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:00:22,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 107 [2024-11-08 18:00:22,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand