./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1 --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 387879bf92b16ead997b40b3e249348f8a6b399496756f9bc3c41b6dc3c21353 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 10:56:33,701 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 10:56:33,756 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 10:56:33,761 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 10:56:33,761 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 10:56:33,782 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 10:56:33,783 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 10:56:33,783 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 10:56:33,783 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 10:56:33,783 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 10:56:33,784 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 10:56:33,784 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 10:56:33,784 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 10:56:33,784 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 10:56:33,784 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 10:56:33,784 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 10:56:33,784 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 10:56:33,784 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 10:56:33,785 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 10:56:33,785 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 10:56:33,785 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 10:56:33,785 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 10:56:33,785 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 10:56:33,785 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 10:56:33,785 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 10:56:33,785 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 10:56:33,785 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 10:56:33,785 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 10:56:33,785 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 10:56:33,785 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 10:56:33,785 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 10:56:33,786 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 10:56:33,786 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 10:56:33,786 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 10:56:33,786 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 10:56:33,786 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 10:56:33,786 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 10:56:33,786 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 10:56:33,786 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 10:56:33,786 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 10:56:33,786 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 10:56:33,786 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 10:56:33,787 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 10:56:33,787 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 10:56:33,787 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 10:56:33,787 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 10:56:33,787 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 10:56:33,787 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1 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 -> 387879bf92b16ead997b40b3e249348f8a6b399496756f9bc3c41b6dc3c21353 [2024-12-02 10:56:34,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 10:56:34,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 10:56:34,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 10:56:34,038 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 10:56:34,038 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 10:56:34,040 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2024-12-02 10:56:36,723 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/data/5c06ceec4/238e7db221d540ce9b21092b271fb6c2/FLAG0c881d3df [2024-12-02 10:56:36,931 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 10:56:36,932 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2024-12-02 10:56:36,940 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/data/5c06ceec4/238e7db221d540ce9b21092b271fb6c2/FLAG0c881d3df [2024-12-02 10:56:36,953 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/data/5c06ceec4/238e7db221d540ce9b21092b271fb6c2 [2024-12-02 10:56:36,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 10:56:36,956 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 10:56:36,957 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 10:56:36,957 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 10:56:36,962 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 10:56:36,963 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:56:36" (1/1) ... [2024-12-02 10:56:36,963 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42845816 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:36, skipping insertion in model container [2024-12-02 10:56:36,964 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:56:36" (1/1) ... [2024-12-02 10:56:36,979 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 10:56:37,118 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-02 10:56:37,123 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 10:56:37,132 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 10:56:37,151 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 10:56:37,165 INFO L204 MainTranslator]: Completed translation [2024-12-02 10:56:37,165 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:37 WrapperNode [2024-12-02 10:56:37,166 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 10:56:37,166 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 10:56:37,166 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 10:56:37,166 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 10:56:37,171 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:37" (1/1) ... [2024-12-02 10:56:37,177 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:37" (1/1) ... [2024-12-02 10:56:37,196 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 133 [2024-12-02 10:56:37,196 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 10:56:37,197 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 10:56:37,197 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 10:56:37,197 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 10:56:37,204 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:37" (1/1) ... [2024-12-02 10:56:37,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:37" (1/1) ... [2024-12-02 10:56:37,206 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:37" (1/1) ... [2024-12-02 10:56:37,218 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-12-02 10:56:37,219 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:37" (1/1) ... [2024-12-02 10:56:37,219 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:37" (1/1) ... [2024-12-02 10:56:37,224 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:37" (1/1) ... [2024-12-02 10:56:37,225 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:37" (1/1) ... [2024-12-02 10:56:37,228 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:37" (1/1) ... [2024-12-02 10:56:37,229 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:37" (1/1) ... [2024-12-02 10:56:37,230 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:37" (1/1) ... [2024-12-02 10:56:37,233 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 10:56:37,233 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 10:56:37,233 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 10:56:37,233 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 10:56:37,234 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:37" (1/1) ... [2024-12-02 10:56:37,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 10:56:37,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:56:37,257 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 10:56:37,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 10:56:37,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 10:56:37,281 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 10:56:37,281 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 10:56:37,281 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 10:56:37,281 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 10:56:37,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 10:56:37,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 10:56:37,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 10:56:37,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 10:56:37,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 10:56:37,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 10:56:37,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 10:56:37,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 10:56:37,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 10:56:37,283 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-12-02 10:56:37,362 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 10:56:37,364 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 10:56:37,600 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 10:56:37,600 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 10:56:37,781 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 10:56:37,781 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-12-02 10:56:37,781 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:56:37 BoogieIcfgContainer [2024-12-02 10:56:37,781 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 10:56:37,783 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 10:56:37,783 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 10:56:37,787 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 10:56:37,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 10:56:36" (1/3) ... [2024-12-02 10:56:37,788 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26f6ee0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 10:56:37, skipping insertion in model container [2024-12-02 10:56:37,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:37" (2/3) ... [2024-12-02 10:56:37,788 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26f6ee0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 10:56:37, skipping insertion in model container [2024-12-02 10:56:37,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:56:37" (3/3) ... [2024-12-02 10:56:37,789 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2024-12-02 10:56:37,800 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 10:56:37,801 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-counter-queue.wvr.c that has 3 procedures, 33 locations, 1 initial locations, 3 loop locations, and 8 error locations. [2024-12-02 10:56:37,801 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 10:56:37,845 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-12-02 10:56:37,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 35 transitions, 84 flow [2024-12-02 10:56:37,896 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2024-12-02 10:56:37,898 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-12-02 10:56:37,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 3/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 54 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-12-02 10:56:37,902 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 35 transitions, 84 flow [2024-12-02 10:56:37,904 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 32 transitions, 76 flow [2024-12-02 10:56:37,911 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 10:56:37,922 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;@6ce6c6c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 10:56:37,922 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-12-02 10:56:37,925 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 10:56:37,925 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-12-02 10:56:37,925 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 10:56:37,925 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:56:37,925 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 10:56:37,926 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:56:37,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:37,930 INFO L85 PathProgramCache]: Analyzing trace with hash 454002, now seen corresponding path program 1 times [2024-12-02 10:56:37,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:56:37,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195024824] [2024-12-02 10:56:37,936 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:37,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:56:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:38,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:56:38,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195024824] [2024-12-02 10:56:38,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195024824] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:56:38,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:56:38,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-12-02 10:56:38,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752415706] [2024-12-02 10:56:38,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:56:38,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 10:56:38,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:56:38,137 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 10:56:38,137 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 10:56:38,154 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:56:38,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-12-02 10:56:38,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:56:38,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:56:38,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:56:38,236 INFO L124 PetriNetUnfolderBase]: 62/137 cut-off events. [2024-12-02 10:56:38,236 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-12-02 10:56:38,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 137 events. 62/137 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 487 event pairs, 42 based on Foata normal form. 1/121 useless extension candidates. Maximal degree in co-relation 224. Up to 109 conditions per place. [2024-12-02 10:56:38,239 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 17 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2024-12-02 10:56:38,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 108 flow [2024-12-02 10:56:38,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 10:56:38,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 10:56:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-12-02 10:56:38,251 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-12-02 10:56:38,253 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 60 transitions. [2024-12-02 10:56:38,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 108 flow [2024-12-02 10:56:38,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 100 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-02 10:56:38,260 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 66 flow [2024-12-02 10:56:38,262 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2024-12-02 10:56:38,266 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2024-12-02 10:56:38,266 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 66 flow [2024-12-02 10:56:38,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-12-02 10:56:38,266 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:56:38,266 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 10:56:38,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 10:56:38,267 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:56:38,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:38,267 INFO L85 PathProgramCache]: Analyzing trace with hash 454003, now seen corresponding path program 1 times [2024-12-02 10:56:38,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:56:38,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997125669] [2024-12-02 10:56:38,268 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:38,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:56:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:38,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:56:38,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997125669] [2024-12-02 10:56:38,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997125669] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:56:38,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:56:38,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 10:56:38,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620089271] [2024-12-02 10:56:38,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:56:38,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:56:38,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:56:38,512 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:56:38,512 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:56:38,533 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:56:38,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2024-12-02 10:56:38,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:56:38,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:56:38,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:56:38,656 INFO L124 PetriNetUnfolderBase]: 63/140 cut-off events. [2024-12-02 10:56:38,656 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-12-02 10:56:38,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 140 events. 63/140 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 505 event pairs, 42 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 244. Up to 114 conditions per place. [2024-12-02 10:56:38,657 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 19 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2024-12-02 10:56:38,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 120 flow [2024-12-02 10:56:38,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 10:56:38,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 10:56:38,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-12-02 10:56:38,659 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-12-02 10:56:38,659 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 66 flow. Second operand 4 states and 76 transitions. [2024-12-02 10:56:38,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 120 flow [2024-12-02 10:56:38,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 32 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 10:56:38,661 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 89 flow [2024-12-02 10:56:38,661 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2024-12-02 10:56:38,662 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2024-12-02 10:56:38,662 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 89 flow [2024-12-02 10:56:38,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2024-12-02 10:56:38,662 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:56:38,662 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-12-02 10:56:38,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 10:56:38,663 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:56:38,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:38,663 INFO L85 PathProgramCache]: Analyzing trace with hash 436310748, now seen corresponding path program 1 times [2024-12-02 10:56:38,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:56:38,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278581769] [2024-12-02 10:56:38,663 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:38,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:56:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:38,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:56:38,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278581769] [2024-12-02 10:56:38,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278581769] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:56:38,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198537452] [2024-12-02 10:56:38,921 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:38,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:38,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:56:38,923 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:56:38,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 10:56:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:38,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-12-02 10:56:38,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:56:39,043 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 [2024-12-02 10:56:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:39,237 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:56:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:39,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198537452] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:56:39,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:56:39,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-12-02 10:56:39,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24906610] [2024-12-02 10:56:39,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:56:39,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 10:56:39,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:56:39,352 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 10:56:39,353 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-12-02 10:56:39,436 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:56:39,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 89 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 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) [2024-12-02 10:56:39,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:56:39,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:56:39,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:56:39,675 INFO L124 PetriNetUnfolderBase]: 64/142 cut-off events. [2024-12-02 10:56:39,675 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-12-02 10:56:39,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 142 events. 64/142 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 500 event pairs, 42 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 251. Up to 111 conditions per place. [2024-12-02 10:56:39,676 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 15 selfloop transitions, 10 changer transitions 0/34 dead transitions. [2024-12-02 10:56:39,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 147 flow [2024-12-02 10:56:39,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 10:56:39,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 10:56:39,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-12-02 10:56:39,678 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2024-12-02 10:56:39,679 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 89 flow. Second operand 8 states and 131 transitions. [2024-12-02 10:56:39,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 147 flow [2024-12-02 10:56:39,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 34 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 10:56:39,680 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 114 flow [2024-12-02 10:56:39,680 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=114, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2024-12-02 10:56:39,681 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2024-12-02 10:56:39,681 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 114 flow [2024-12-02 10:56:39,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 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) [2024-12-02 10:56:39,681 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:56:39,681 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-12-02 10:56:39,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 10:56:39,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:39,882 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:56:39,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:39,883 INFO L85 PathProgramCache]: Analyzing trace with hash 642755290, now seen corresponding path program 1 times [2024-12-02 10:56:39,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:56:39,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327262144] [2024-12-02 10:56:39,883 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:39,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:56:39,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:39,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:56:39,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327262144] [2024-12-02 10:56:39,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327262144] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:56:39,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:56:39,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 10:56:39,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040545770] [2024-12-02 10:56:39,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:56:39,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:56:39,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:56:39,940 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:56:39,940 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:56:39,953 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2024-12-02 10:56:39,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2024-12-02 10:56:39,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:56:39,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2024-12-02 10:56:39,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:56:40,015 INFO L124 PetriNetUnfolderBase]: 64/136 cut-off events. [2024-12-02 10:56:40,015 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-12-02 10:56:40,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 136 events. 64/136 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 456 event pairs, 42 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 246. Up to 110 conditions per place. [2024-12-02 10:56:40,017 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 21 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2024-12-02 10:56:40,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 32 transitions, 160 flow [2024-12-02 10:56:40,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 10:56:40,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 10:56:40,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-12-02 10:56:40,018 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-12-02 10:56:40,018 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 114 flow. Second operand 4 states and 65 transitions. [2024-12-02 10:56:40,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 32 transitions, 160 flow [2024-12-02 10:56:40,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 32 transitions, 118 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-12-02 10:56:40,020 INFO L231 Difference]: Finished difference. Result has 33 places, 32 transitions, 76 flow [2024-12-02 10:56:40,020 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=32} [2024-12-02 10:56:40,021 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2024-12-02 10:56:40,021 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 32 transitions, 76 flow [2024-12-02 10:56:40,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2024-12-02 10:56:40,021 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:56:40,021 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-12-02 10:56:40,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 10:56:40,021 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:56:40,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:40,022 INFO L85 PathProgramCache]: Analyzing trace with hash 642755291, now seen corresponding path program 1 times [2024-12-02 10:56:40,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:56:40,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711491666] [2024-12-02 10:56:40,022 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:40,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:56:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:40,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:40,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:56:40,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711491666] [2024-12-02 10:56:40,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711491666] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:56:40,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:56:40,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 10:56:40,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86418813] [2024-12-02 10:56:40,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:56:40,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 10:56:40,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:56:40,086 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 10:56:40,086 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 10:56:40,098 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:56:40,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 32 transitions, 76 flow. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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) [2024-12-02 10:56:40,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:56:40,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:56:40,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:56:40,206 INFO L124 PetriNetUnfolderBase]: 114/245 cut-off events. [2024-12-02 10:56:40,206 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-12-02 10:56:40,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476 conditions, 245 events. 114/245 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 981 event pairs, 72 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 292. Up to 139 conditions per place. [2024-12-02 10:56:40,208 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 41 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2024-12-02 10:56:40,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 52 transitions, 213 flow [2024-12-02 10:56:40,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 10:56:40,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 10:56:40,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-12-02 10:56:40,209 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6228571428571429 [2024-12-02 10:56:40,210 INFO L175 Difference]: Start difference. First operand has 33 places, 32 transitions, 76 flow. Second operand 5 states and 109 transitions. [2024-12-02 10:56:40,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 52 transitions, 213 flow [2024-12-02 10:56:40,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 52 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 10:56:40,211 INFO L231 Difference]: Finished difference. Result has 37 places, 34 transitions, 96 flow [2024-12-02 10:56:40,211 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=37, PETRI_TRANSITIONS=34} [2024-12-02 10:56:40,212 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2024-12-02 10:56:40,212 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 34 transitions, 96 flow [2024-12-02 10:56:40,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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) [2024-12-02 10:56:40,213 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:56:40,213 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:56:40,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 10:56:40,213 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:56:40,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:40,214 INFO L85 PathProgramCache]: Analyzing trace with hash -797984060, now seen corresponding path program 1 times [2024-12-02 10:56:40,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:56:40,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001481496] [2024-12-02 10:56:40,214 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:40,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:56:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:40,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:40,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:56:40,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001481496] [2024-12-02 10:56:40,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001481496] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:56:40,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:56:40,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 10:56:40,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314326251] [2024-12-02 10:56:40,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:56:40,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 10:56:40,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:56:40,295 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 10:56:40,295 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 10:56:40,309 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:56:40,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 34 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:56:40,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:56:40,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:56:40,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:56:40,421 INFO L124 PetriNetUnfolderBase]: 98/214 cut-off events. [2024-12-02 10:56:40,421 INFO L125 PetriNetUnfolderBase]: For 68/77 co-relation queries the response was YES. [2024-12-02 10:56:40,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 214 events. 98/214 cut-off events. For 68/77 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 797 event pairs, 67 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 326. Up to 137 conditions per place. [2024-12-02 10:56:40,423 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 36 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2024-12-02 10:56:40,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 47 transitions, 217 flow [2024-12-02 10:56:40,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 10:56:40,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 10:56:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-12-02 10:56:40,425 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5942857142857143 [2024-12-02 10:56:40,425 INFO L175 Difference]: Start difference. First operand has 37 places, 34 transitions, 96 flow. Second operand 5 states and 104 transitions. [2024-12-02 10:56:40,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 47 transitions, 217 flow [2024-12-02 10:56:40,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 47 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 10:56:40,427 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 116 flow [2024-12-02 10:56:40,427 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2024-12-02 10:56:40,427 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2024-12-02 10:56:40,428 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 116 flow [2024-12-02 10:56:40,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:56:40,428 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:56:40,428 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:56:40,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-02 10:56:40,428 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:56:40,429 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:40,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1564909778, now seen corresponding path program 1 times [2024-12-02 10:56:40,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:56:40,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729312957] [2024-12-02 10:56:40,429 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:40,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:56:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:40,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:56:40,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:56:40,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729312957] [2024-12-02 10:56:40,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729312957] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:56:40,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955008676] [2024-12-02 10:56:40,622 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:40,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:40,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:56:40,624 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:56:40,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 10:56:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:40,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 10:56:40,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:56:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:56:40,768 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:56:40,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-12-02 10:56:40,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:56:40,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955008676] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:56:40,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:56:40,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-12-02 10:56:40,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336278412] [2024-12-02 10:56:40,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:56:40,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 10:56:40,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:56:40,834 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 10:56:40,834 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-12-02 10:56:40,949 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:56:40,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 116 flow. Second operand has 11 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 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) [2024-12-02 10:56:40,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:56:40,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:56:40,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:56:41,211 INFO L124 PetriNetUnfolderBase]: 137/296 cut-off events. [2024-12-02 10:56:41,211 INFO L125 PetriNetUnfolderBase]: For 112/125 co-relation queries the response was YES. [2024-12-02 10:56:41,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 708 conditions, 296 events. 137/296 cut-off events. For 112/125 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1213 event pairs, 64 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 521. Up to 119 conditions per place. [2024-12-02 10:56:41,213 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 44 selfloop transitions, 10 changer transitions 0/60 dead transitions. [2024-12-02 10:56:41,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 60 transitions, 288 flow [2024-12-02 10:56:41,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 10:56:41,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 10:56:41,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-12-02 10:56:41,215 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5836734693877551 [2024-12-02 10:56:41,215 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 116 flow. Second operand 7 states and 143 transitions. [2024-12-02 10:56:41,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 60 transitions, 288 flow [2024-12-02 10:56:41,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 283 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 10:56:41,218 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 155 flow [2024-12-02 10:56:41,218 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=155, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2024-12-02 10:56:41,219 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2024-12-02 10:56:41,219 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 155 flow [2024-12-02 10:56:41,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 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) [2024-12-02 10:56:41,219 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:56:41,219 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:56:41,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 10:56:41,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-12-02 10:56:41,420 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:56:41,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:41,420 INFO L85 PathProgramCache]: Analyzing trace with hash 629214971, now seen corresponding path program 1 times [2024-12-02 10:56:41,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:56:41,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496531100] [2024-12-02 10:56:41,421 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:41,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:56:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:56:41,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:56:41,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496531100] [2024-12-02 10:56:41,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496531100] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:56:41,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415646047] [2024-12-02 10:56:41,580 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:41,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:41,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:56:41,582 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:56:41,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 10:56:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:41,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-12-02 10:56:41,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:56:41,657 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 [2024-12-02 10:56:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:56:41,740 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:56:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:56:41,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415646047] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 10:56:41,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:56:41,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2024-12-02 10:56:41,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468180333] [2024-12-02 10:56:41,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:56:41,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 10:56:41,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:56:41,826 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 10:56:41,826 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-12-02 10:56:41,862 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:56:41,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 155 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 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) [2024-12-02 10:56:41,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:56:41,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:56:41,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:56:42,022 INFO L124 PetriNetUnfolderBase]: 178/351 cut-off events. [2024-12-02 10:56:42,023 INFO L125 PetriNetUnfolderBase]: For 413/445 co-relation queries the response was YES. [2024-12-02 10:56:42,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 351 events. 178/351 cut-off events. For 413/445 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1405 event pairs, 88 based on Foata normal form. 0/328 useless extension candidates. Maximal degree in co-relation 802. Up to 167 conditions per place. [2024-12-02 10:56:42,026 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 42 selfloop transitions, 9 changer transitions 0/57 dead transitions. [2024-12-02 10:56:42,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 57 transitions, 328 flow [2024-12-02 10:56:42,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 10:56:42,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 10:56:42,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-12-02 10:56:42,027 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2024-12-02 10:56:42,027 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 155 flow. Second operand 6 states and 121 transitions. [2024-12-02 10:56:42,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 57 transitions, 328 flow [2024-12-02 10:56:42,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 57 transitions, 313 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-12-02 10:56:42,030 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 182 flow [2024-12-02 10:56:42,030 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2024-12-02 10:56:42,031 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 14 predicate places. [2024-12-02 10:56:42,031 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 182 flow [2024-12-02 10:56:42,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 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) [2024-12-02 10:56:42,031 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:56:42,031 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:56:42,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-12-02 10:56:42,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:42,232 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:56:42,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:42,232 INFO L85 PathProgramCache]: Analyzing trace with hash 627132343, now seen corresponding path program 1 times [2024-12-02 10:56:42,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:56:42,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206915804] [2024-12-02 10:56:42,233 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:42,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:56:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:56:42,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:56:42,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206915804] [2024-12-02 10:56:42,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206915804] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:56:42,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473241517] [2024-12-02 10:56:42,339 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:42,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:42,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:56:42,341 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:56:42,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 10:56:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:42,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 10:56:42,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:56:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:56:42,485 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:56:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:56:42,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473241517] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:56:42,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:56:42,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-12-02 10:56:42,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502214520] [2024-12-02 10:56:42,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:56:42,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 10:56:42,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:56:42,547 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 10:56:42,547 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-12-02 10:56:42,584 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:56:42,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 182 flow. Second operand has 14 states, 14 states have (on average 14.928571428571429) internal successors, (209), 14 states have internal predecessors, (209), 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) [2024-12-02 10:56:42,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:56:42,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:56:42,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:56:42,814 INFO L124 PetriNetUnfolderBase]: 315/614 cut-off events. [2024-12-02 10:56:42,814 INFO L125 PetriNetUnfolderBase]: For 965/1027 co-relation queries the response was YES. [2024-12-02 10:56:42,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1979 conditions, 614 events. 315/614 cut-off events. For 965/1027 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2772 event pairs, 149 based on Foata normal form. 12/618 useless extension candidates. Maximal degree in co-relation 1029. Up to 278 conditions per place. [2024-12-02 10:56:42,818 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 61 selfloop transitions, 13 changer transitions 0/80 dead transitions. [2024-12-02 10:56:42,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 80 transitions, 522 flow [2024-12-02 10:56:42,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 10:56:42,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 10:56:42,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-12-02 10:56:42,819 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-12-02 10:56:42,819 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 182 flow. Second operand 8 states and 162 transitions. [2024-12-02 10:56:42,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 80 transitions, 522 flow [2024-12-02 10:56:42,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 501 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-12-02 10:56:42,823 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 245 flow [2024-12-02 10:56:42,823 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=245, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2024-12-02 10:56:42,824 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 20 predicate places. [2024-12-02 10:56:42,824 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 245 flow [2024-12-02 10:56:42,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.928571428571429) internal successors, (209), 14 states have internal predecessors, (209), 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) [2024-12-02 10:56:42,824 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:56:42,824 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:56:42,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 10:56:43,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:43,024 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:56:43,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:43,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1492005273, now seen corresponding path program 1 times [2024-12-02 10:56:43,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:56:43,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368933816] [2024-12-02 10:56:43,025 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:43,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:56:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:43,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:56:43,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368933816] [2024-12-02 10:56:43,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368933816] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:56:43,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:56:43,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 10:56:43,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238763606] [2024-12-02 10:56:43,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:56:43,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 10:56:43,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:56:43,050 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 10:56:43,050 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 10:56:43,052 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-12-02 10:56:43,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 245 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2024-12-02 10:56:43,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:56:43,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-12-02 10:56:43,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:56:43,174 INFO L124 PetriNetUnfolderBase]: 409/812 cut-off events. [2024-12-02 10:56:43,174 INFO L125 PetriNetUnfolderBase]: For 1609/1668 co-relation queries the response was YES. [2024-12-02 10:56:43,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2729 conditions, 812 events. 409/812 cut-off events. For 1609/1668 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3964 event pairs, 122 based on Foata normal form. 3/812 useless extension candidates. Maximal degree in co-relation 1384. Up to 479 conditions per place. [2024-12-02 10:56:43,179 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 46 selfloop transitions, 3 changer transitions 6/60 dead transitions. [2024-12-02 10:56:43,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 434 flow [2024-12-02 10:56:43,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 10:56:43,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 10:56:43,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-12-02 10:56:43,180 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2024-12-02 10:56:43,180 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 245 flow. Second operand 3 states and 71 transitions. [2024-12-02 10:56:43,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 434 flow [2024-12-02 10:56:43,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 60 transitions, 418 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-12-02 10:56:43,185 INFO L231 Difference]: Finished difference. Result has 55 places, 42 transitions, 213 flow [2024-12-02 10:56:43,185 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=55, PETRI_TRANSITIONS=42} [2024-12-02 10:56:43,185 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 19 predicate places. [2024-12-02 10:56:43,186 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 42 transitions, 213 flow [2024-12-02 10:56:43,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2024-12-02 10:56:43,186 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:56:43,186 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:56:43,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-12-02 10:56:43,186 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:56:43,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:43,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1358576480, now seen corresponding path program 1 times [2024-12-02 10:56:43,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:56:43,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395520845] [2024-12-02 10:56:43,186 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:43,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:56:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:56:43,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:56:43,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395520845] [2024-12-02 10:56:43,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395520845] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:56:43,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903691372] [2024-12-02 10:56:43,281 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:43,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:43,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:56:43,283 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:56:43,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 10:56:43,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:43,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 10:56:43,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:56:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:56:43,410 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:56:43,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:56:43,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903691372] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:56:43,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:56:43,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-12-02 10:56:43,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185619492] [2024-12-02 10:56:43,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:56:43,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 10:56:43,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:56:43,464 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 10:56:43,464 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-12-02 10:56:43,507 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:56:43,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 213 flow. Second operand has 14 states, 14 states have (on average 15.071428571428571) internal successors, (211), 14 states have internal predecessors, (211), 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) [2024-12-02 10:56:43,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:56:43,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:56:43,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:56:43,701 INFO L124 PetriNetUnfolderBase]: 340/656 cut-off events. [2024-12-02 10:56:43,701 INFO L125 PetriNetUnfolderBase]: For 1527/1599 co-relation queries the response was YES. [2024-12-02 10:56:43,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2318 conditions, 656 events. 340/656 cut-off events. For 1527/1599 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3130 event pairs, 197 based on Foata normal form. 13/660 useless extension candidates. Maximal degree in co-relation 1357. Up to 348 conditions per place. [2024-12-02 10:56:43,706 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 52 selfloop transitions, 10 changer transitions 0/70 dead transitions. [2024-12-02 10:56:43,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 70 transitions, 489 flow [2024-12-02 10:56:43,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 10:56:43,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 10:56:43,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-12-02 10:56:43,707 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-12-02 10:56:43,708 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 213 flow. Second operand 8 states and 159 transitions. [2024-12-02 10:56:43,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 70 transitions, 489 flow [2024-12-02 10:56:43,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 70 transitions, 462 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-12-02 10:56:43,712 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 257 flow [2024-12-02 10:56:43,712 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=257, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2024-12-02 10:56:43,712 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 22 predicate places. [2024-12-02 10:56:43,713 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 257 flow [2024-12-02 10:56:43,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.071428571428571) internal successors, (211), 14 states have internal predecessors, (211), 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) [2024-12-02 10:56:43,713 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:56:43,713 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:56:43,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 10:56:43,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:43,914 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:56:43,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:43,914 INFO L85 PathProgramCache]: Analyzing trace with hash 749709422, now seen corresponding path program 2 times [2024-12-02 10:56:43,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:56:43,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275472979] [2024-12-02 10:56:43,914 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:56:43,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:56:43,930 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:56:43,930 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:56:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 10:56:44,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:56:44,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275472979] [2024-12-02 10:56:44,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275472979] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:56:44,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66201707] [2024-12-02 10:56:44,126 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:56:44,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:44,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:56:44,127 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:56:44,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 10:56:44,183 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:56:44,184 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:56:44,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-12-02 10:56:44,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:56:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 10:56:44,312 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:56:44,421 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 [2024-12-02 10:56:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 10:56:44,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66201707] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:56:44,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:56:44,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-12-02 10:56:44,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554210958] [2024-12-02 10:56:44,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:56:44,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-12-02 10:56:44,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:56:44,474 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-12-02 10:56:44,475 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-12-02 10:56:44,893 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-12-02 10:56:44,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 257 flow. Second operand has 20 states, 20 states have (on average 13.9) internal successors, (278), 20 states have internal predecessors, (278), 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) [2024-12-02 10:56:44,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:56:44,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-12-02 10:56:44,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:56:45,548 INFO L124 PetriNetUnfolderBase]: 408/774 cut-off events. [2024-12-02 10:56:45,548 INFO L125 PetriNetUnfolderBase]: For 1703/1744 co-relation queries the response was YES. [2024-12-02 10:56:45,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2747 conditions, 774 events. 408/774 cut-off events. For 1703/1744 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3685 event pairs, 75 based on Foata normal form. 24/790 useless extension candidates. Maximal degree in co-relation 1721. Up to 136 conditions per place. [2024-12-02 10:56:45,554 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 95 selfloop transitions, 18 changer transitions 0/120 dead transitions. [2024-12-02 10:56:45,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 120 transitions, 870 flow [2024-12-02 10:56:45,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 10:56:45,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-12-02 10:56:45,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 269 transitions. [2024-12-02 10:56:45,555 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5489795918367347 [2024-12-02 10:56:45,556 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 257 flow. Second operand 14 states and 269 transitions. [2024-12-02 10:56:45,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 120 transitions, 870 flow [2024-12-02 10:56:45,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 120 transitions, 851 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-12-02 10:56:45,561 INFO L231 Difference]: Finished difference. Result has 68 places, 49 transitions, 306 flow [2024-12-02 10:56:45,561 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=306, PETRI_PLACES=68, PETRI_TRANSITIONS=49} [2024-12-02 10:56:45,561 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 32 predicate places. [2024-12-02 10:56:45,561 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 49 transitions, 306 flow [2024-12-02 10:56:45,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 13.9) internal successors, (278), 20 states have internal predecessors, (278), 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) [2024-12-02 10:56:45,561 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:56:45,562 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:56:45,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 10:56:45,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:45,762 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:56:45,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:45,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1103934889, now seen corresponding path program 2 times [2024-12-02 10:56:45,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:56:45,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538699535] [2024-12-02 10:56:45,763 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:56:45,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:56:45,773 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:56:45,774 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:56:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 10:56:45,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:56:45,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538699535] [2024-12-02 10:56:45,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538699535] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:56:45,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259437686] [2024-12-02 10:56:45,922 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:56:45,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:45,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:56:45,924 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:56:45,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 10:56:45,990 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:56:45,990 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:56:45,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-12-02 10:56:45,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:56:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 10:56:46,127 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:56:46,238 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 [2024-12-02 10:56:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 10:56:46,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259437686] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:56:46,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:56:46,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-12-02 10:56:46,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154758115] [2024-12-02 10:56:46,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:56:46,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-12-02 10:56:46,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:56:46,291 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-12-02 10:56:46,291 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2024-12-02 10:56:46,610 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-12-02 10:56:46,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 49 transitions, 306 flow. Second operand has 20 states, 20 states have (on average 14.2) internal successors, (284), 20 states have internal predecessors, (284), 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) [2024-12-02 10:56:46,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:56:46,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-12-02 10:56:46,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:56:47,252 INFO L124 PetriNetUnfolderBase]: 557/1014 cut-off events. [2024-12-02 10:56:47,252 INFO L125 PetriNetUnfolderBase]: For 3378/3420 co-relation queries the response was YES. [2024-12-02 10:56:47,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3866 conditions, 1014 events. 557/1014 cut-off events. For 3378/3420 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4739 event pairs, 112 based on Foata normal form. 38/1033 useless extension candidates. Maximal degree in co-relation 2775. Up to 175 conditions per place. [2024-12-02 10:56:47,256 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 103 selfloop transitions, 18 changer transitions 0/129 dead transitions. [2024-12-02 10:56:47,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 129 transitions, 1085 flow [2024-12-02 10:56:47,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 10:56:47,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-12-02 10:56:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 262 transitions. [2024-12-02 10:56:47,258 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5346938775510204 [2024-12-02 10:56:47,258 INFO L175 Difference]: Start difference. First operand has 68 places, 49 transitions, 306 flow. Second operand 14 states and 262 transitions. [2024-12-02 10:56:47,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 129 transitions, 1085 flow [2024-12-02 10:56:47,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 129 transitions, 901 flow, removed 32 selfloop flow, removed 11 redundant places. [2024-12-02 10:56:47,262 INFO L231 Difference]: Finished difference. Result has 71 places, 53 transitions, 327 flow [2024-12-02 10:56:47,263 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=327, PETRI_PLACES=71, PETRI_TRANSITIONS=53} [2024-12-02 10:56:47,263 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 35 predicate places. [2024-12-02 10:56:47,263 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 53 transitions, 327 flow [2024-12-02 10:56:47,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 14.2) internal successors, (284), 20 states have internal predecessors, (284), 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) [2024-12-02 10:56:47,263 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:56:47,263 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:56:47,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 10:56:47,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:47,464 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:56:47,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:47,464 INFO L85 PathProgramCache]: Analyzing trace with hash 846822547, now seen corresponding path program 1 times [2024-12-02 10:56:47,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:56:47,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098858426] [2024-12-02 10:56:47,464 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:47,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:56:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:56:47,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:56:47,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098858426] [2024-12-02 10:56:47,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098858426] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:56:47,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35669654] [2024-12-02 10:56:47,532 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:47,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:47,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:56:47,534 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:56:47,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 10:56:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:47,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 10:56:47,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:56:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 10:56:47,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:56:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 10:56:47,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35669654] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 10:56:47,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:56:47,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-12-02 10:56:47,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527915545] [2024-12-02 10:56:47,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:56:47,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 10:56:47,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:56:47,666 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 10:56:47,666 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-12-02 10:56:47,671 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:56:47,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 53 transitions, 327 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:56:47,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:56:47,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:56:47,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:56:47,808 INFO L124 PetriNetUnfolderBase]: 519/958 cut-off events. [2024-12-02 10:56:47,808 INFO L125 PetriNetUnfolderBase]: For 3594/3618 co-relation queries the response was YES. [2024-12-02 10:56:47,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3695 conditions, 958 events. 519/958 cut-off events. For 3594/3618 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 4506 event pairs, 128 based on Foata normal form. 34/945 useless extension candidates. Maximal degree in co-relation 2816. Up to 476 conditions per place. [2024-12-02 10:56:47,815 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 50 selfloop transitions, 10 changer transitions 0/68 dead transitions. [2024-12-02 10:56:47,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 68 transitions, 574 flow [2024-12-02 10:56:47,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 10:56:47,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 10:56:47,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-12-02 10:56:47,816 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-12-02 10:56:47,816 INFO L175 Difference]: Start difference. First operand has 71 places, 53 transitions, 327 flow. Second operand 5 states and 95 transitions. [2024-12-02 10:56:47,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 68 transitions, 574 flow [2024-12-02 10:56:47,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 68 transitions, 484 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-12-02 10:56:47,821 INFO L231 Difference]: Finished difference. Result has 66 places, 52 transitions, 300 flow [2024-12-02 10:56:47,822 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=300, PETRI_PLACES=66, PETRI_TRANSITIONS=52} [2024-12-02 10:56:47,822 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 30 predicate places. [2024-12-02 10:56:47,822 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 52 transitions, 300 flow [2024-12-02 10:56:47,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:56:47,822 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:56:47,822 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:56:47,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 10:56:48,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:48,023 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:56:48,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:48,023 INFO L85 PathProgramCache]: Analyzing trace with hash 773181213, now seen corresponding path program 1 times [2024-12-02 10:56:48,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:56:48,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64367359] [2024-12-02 10:56:48,024 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:48,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:56:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:56:48,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:56:48,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64367359] [2024-12-02 10:56:48,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64367359] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:56:48,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284591667] [2024-12-02 10:56:48,107 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:48,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:48,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:56:48,109 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:56:48,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 10:56:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:48,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 10:56:48,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:56:48,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 10:56:48,212 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:56:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 10:56:48,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284591667] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 10:56:48,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:56:48,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2024-12-02 10:56:48,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729793245] [2024-12-02 10:56:48,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:56:48,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 10:56:48,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:56:48,248 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 10:56:48,248 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-12-02 10:56:48,255 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:56:48,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 52 transitions, 300 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:56:48,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:56:48,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:56:48,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:56:48,385 INFO L124 PetriNetUnfolderBase]: 461/894 cut-off events. [2024-12-02 10:56:48,386 INFO L125 PetriNetUnfolderBase]: For 2975/2993 co-relation queries the response was YES. [2024-12-02 10:56:48,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3213 conditions, 894 events. 461/894 cut-off events. For 2975/2993 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 4222 event pairs, 147 based on Foata normal form. 28/889 useless extension candidates. Maximal degree in co-relation 2529. Up to 407 conditions per place. [2024-12-02 10:56:48,392 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 45 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-12-02 10:56:48,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 64 transitions, 493 flow [2024-12-02 10:56:48,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 10:56:48,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 10:56:48,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-12-02 10:56:48,393 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5371428571428571 [2024-12-02 10:56:48,393 INFO L175 Difference]: Start difference. First operand has 66 places, 52 transitions, 300 flow. Second operand 5 states and 94 transitions. [2024-12-02 10:56:48,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 64 transitions, 493 flow [2024-12-02 10:56:48,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 64 transitions, 470 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-12-02 10:56:48,397 INFO L231 Difference]: Finished difference. Result has 68 places, 51 transitions, 307 flow [2024-12-02 10:56:48,397 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=68, PETRI_TRANSITIONS=51} [2024-12-02 10:56:48,398 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 32 predicate places. [2024-12-02 10:56:48,398 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 51 transitions, 307 flow [2024-12-02 10:56:48,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:56:48,398 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:56:48,398 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:56:48,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 10:56:48,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-12-02 10:56:48,599 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:56:48,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:48,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1499416600, now seen corresponding path program 1 times [2024-12-02 10:56:48,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:56:48,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696132029] [2024-12-02 10:56:48,599 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:48,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:56:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 10:56:48,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:56:48,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696132029] [2024-12-02 10:56:48,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696132029] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:56:48,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142792090] [2024-12-02 10:56:48,869 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:48,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:48,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:56:48,870 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:56:48,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 10:56:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:48,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-12-02 10:56:48,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:56:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 10:56:49,037 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:56:49,080 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 10:56:49,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 14 [2024-12-02 10:56:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 10:56:49,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142792090] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:56:49,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:56:49,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2024-12-02 10:56:49,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812837193] [2024-12-02 10:56:49,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:56:49,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 10:56:49,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:56:49,097 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 10:56:49,097 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-12-02 10:56:49,257 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-12-02 10:56:49,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 51 transitions, 307 flow. Second operand has 18 states, 18 states have (on average 14.11111111111111) internal successors, (254), 18 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:56:49,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:56:49,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-12-02 10:56:49,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:56:49,808 INFO L124 PetriNetUnfolderBase]: 933/1747 cut-off events. [2024-12-02 10:56:49,808 INFO L125 PetriNetUnfolderBase]: For 4997/5033 co-relation queries the response was YES. [2024-12-02 10:56:49,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6563 conditions, 1747 events. 933/1747 cut-off events. For 4997/5033 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9317 event pairs, 121 based on Foata normal form. 3/1748 useless extension candidates. Maximal degree in co-relation 5327. Up to 799 conditions per place. [2024-12-02 10:56:49,816 INFO L140 encePairwiseOnDemand]: 24/35 looper letters, 133 selfloop transitions, 55 changer transitions 14/211 dead transitions. [2024-12-02 10:56:49,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 211 transitions, 1636 flow [2024-12-02 10:56:49,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-12-02 10:56:49,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-12-02 10:56:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 398 transitions. [2024-12-02 10:56:49,819 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5414965986394558 [2024-12-02 10:56:49,819 INFO L175 Difference]: Start difference. First operand has 68 places, 51 transitions, 307 flow. Second operand 21 states and 398 transitions. [2024-12-02 10:56:49,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 211 transitions, 1636 flow [2024-12-02 10:56:49,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 211 transitions, 1592 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-12-02 10:56:49,827 INFO L231 Difference]: Finished difference. Result has 93 places, 102 transitions, 798 flow [2024-12-02 10:56:49,828 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=798, PETRI_PLACES=93, PETRI_TRANSITIONS=102} [2024-12-02 10:56:49,828 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 57 predicate places. [2024-12-02 10:56:49,828 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 102 transitions, 798 flow [2024-12-02 10:56:49,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.11111111111111) internal successors, (254), 18 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:56:49,828 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:56:49,828 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:56:49,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 10:56:50,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-12-02 10:56:50,029 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:56:50,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:50,029 INFO L85 PathProgramCache]: Analyzing trace with hash -965669172, now seen corresponding path program 2 times [2024-12-02 10:56:50,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:56:50,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977158207] [2024-12-02 10:56:50,030 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:56:50,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:56:50,044 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:56:50,044 INFO L230 tOrderPrioritization]: Conjunction of SSA is sat [2024-12-02 10:56:50,044 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-12-02 10:56:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-12-02 10:56:50,074 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-12-02 10:56:50,074 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-12-02 10:56:50,075 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (13 of 14 remaining) [2024-12-02 10:56:50,077 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2024-12-02 10:56:50,077 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2024-12-02 10:56:50,077 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2024-12-02 10:56:50,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2024-12-02 10:56:50,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2024-12-02 10:56:50,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2024-12-02 10:56:50,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (6 of 14 remaining) [2024-12-02 10:56:50,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 14 remaining) [2024-12-02 10:56:50,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 14 remaining) [2024-12-02 10:56:50,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 14 remaining) [2024-12-02 10:56:50,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2024-12-02 10:56:50,078 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 14 remaining) [2024-12-02 10:56:50,079 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 14 remaining) [2024-12-02 10:56:50,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-12-02 10:56:50,079 INFO L422 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:56:50,116 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-12-02 10:56:50,116 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-12-02 10:56:50,121 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 10:56:50 BasicIcfg [2024-12-02 10:56:50,121 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-12-02 10:56:50,122 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-12-02 10:56:50,122 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-12-02 10:56:50,122 INFO L274 PluginConnector]: Witness Printer initialized [2024-12-02 10:56:50,122 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:56:37" (3/4) ... [2024-12-02 10:56:50,123 INFO L149 WitnessPrinter]: No result that supports witness generation found [2024-12-02 10:56:50,124 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-12-02 10:56:50,124 INFO L158 Benchmark]: Toolchain (without parser) took 13168.65ms. Allocated memory was 142.6MB in the beginning and 427.8MB in the end (delta: 285.2MB). Free memory was 118.6MB in the beginning and 184.5MB in the end (delta: -65.9MB). Peak memory consumption was 218.0MB. Max. memory is 16.1GB. [2024-12-02 10:56:50,125 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 142.6MB. Free memory is still 82.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 10:56:50,125 INFO L158 Benchmark]: CACSL2BoogieTranslator took 208.75ms. Allocated memory is still 142.6MB. Free memory was 118.4MB in the beginning and 106.4MB in the end (delta: 12.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-02 10:56:50,125 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.21ms. Allocated memory is still 142.6MB. Free memory was 106.4MB in the beginning and 104.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 10:56:50,126 INFO L158 Benchmark]: Boogie Preprocessor took 35.77ms. Allocated memory is still 142.6MB. Free memory was 104.8MB in the beginning and 102.8MB in the end (delta: 1.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-02 10:56:50,126 INFO L158 Benchmark]: RCFGBuilder took 548.04ms. Allocated memory is still 142.6MB. Free memory was 102.8MB in the beginning and 112.8MB in the end (delta: -9.9MB). Peak memory consumption was 46.7MB. Max. memory is 16.1GB. [2024-12-02 10:56:50,126 INFO L158 Benchmark]: TraceAbstraction took 12337.92ms. Allocated memory was 142.6MB in the beginning and 427.8MB in the end (delta: 285.2MB). Free memory was 112.2MB in the beginning and 184.5MB in the end (delta: -72.3MB). Peak memory consumption was 213.3MB. Max. memory is 16.1GB. [2024-12-02 10:56:50,126 INFO L158 Benchmark]: Witness Printer took 2.31ms. Allocated memory is still 427.8MB. Free memory was 184.5MB in the beginning and 184.5MB in the end (delta: 35.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 10:56:50,127 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 142.6MB. Free memory is still 82.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 208.75ms. Allocated memory is still 142.6MB. Free memory was 118.4MB in the beginning and 106.4MB in the end (delta: 12.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.21ms. Allocated memory is still 142.6MB. Free memory was 106.4MB in the beginning and 104.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 35.77ms. Allocated memory is still 142.6MB. Free memory was 104.8MB in the beginning and 102.8MB in the end (delta: 1.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 548.04ms. Allocated memory is still 142.6MB. Free memory was 102.8MB in the beginning and 112.8MB in the end (delta: -9.9MB). Peak memory consumption was 46.7MB. Max. memory is 16.1GB. * TraceAbstraction took 12337.92ms. Allocated memory was 142.6MB in the beginning and 427.8MB in the end (delta: 285.2MB). Free memory was 112.2MB in the beginning and 184.5MB in the end (delta: -72.3MB). Peak memory consumption was 213.3MB. Max. memory is 16.1GB. * Witness Printer took 2.31ms. Allocated memory is still 427.8MB. Free memory was 184.5MB in the beginning and 184.5MB in the end (delta: 35.8kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 21. Possible FailurePath: [L39] 0 int* A; [L40] 0 _Atomic int counter; [L41] 0 int N; [L66] 0 pthread_t t1, t2; [L68] 0 N = __VERIFIER_nondet_int() [L69] CALL, EXPR 0 create_fresh_int_array(N) [L84] CALL 0 assume_abort_if_not(size >= 0) [L36] COND FALSE 0 !(!cond) [L84] RET 0 assume_abort_if_not(size >= 0) [L85] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L36] COND FALSE 0 !(!cond) [L85] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L87] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L88] 0 int i = 0; VAL [A={0:0}, N=1, \old(size)=1, arr={-2:0}, counter=0, i=0, size=1] [L88] COND TRUE 0 i < size [L89] 0 arr[i] = __VERIFIER_nondet_int() [L88] 0 i++ VAL [A={0:0}, N=1, \old(size)=1, arr={-2:0}, counter=0, i=1, size=1] [L88] COND FALSE 0 !(i < size) [L91] 0 return arr; [L69] RET, EXPR 0 create_fresh_int_array(N) [L69] 0 A = create_fresh_int_array(N) [L72] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={-2:0}, N=1, counter=0, t1=-1] [L73] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={-2:0}, N=1, counter=0, t1=-1, t2=0] [L48] 1 int i=0; VAL [A={-2:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=0, i=0] [L48] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L36] COND FALSE 1 !(!cond) [L101] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L102] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L36] COND FALSE 1 !(!cond) [L102] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L103] 1 return a + b; [L49] RET, EXPR 1 plus(counter, A[i]) [L49] 1 int tmp = plus(counter, A[i]); [L57] 2 int i=0; VAL [A={-2:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=0, i=0] [L57] COND TRUE 2 i= b - 2147483648) [L36] COND FALSE 2 !(!cond) [L95] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L96] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L36] COND FALSE 2 !(!cond) [L96] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L97] 2 return a - b; [L58] RET, EXPR 2 minus(counter, A[i]) [L58] 2 int tmp = minus(counter, A[i]); [L59] 2 counter = tmp VAL [A={-2:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=5, i=0, tmp=5] [L57] 2 i++ VAL [A={-2:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=5, i=1] [L57] COND FALSE 2 !(i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1 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 -> 387879bf92b16ead997b40b3e249348f8a6b399496756f9bc3c41b6dc3c21353 [2024-12-02 10:56:52,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 10:56:52,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 10:56:52,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 10:56:52,432 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 10:56:52,433 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 10:56:52,434 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2024-12-02 10:56:55,087 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/data/4d88aabd0/bb74120994c84731857507e9d0347fe3/FLAGbd656b318 [2024-12-02 10:56:55,251 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 10:56:55,251 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2024-12-02 10:56:55,257 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/data/4d88aabd0/bb74120994c84731857507e9d0347fe3/FLAGbd656b318 [2024-12-02 10:56:55,270 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/data/4d88aabd0/bb74120994c84731857507e9d0347fe3 [2024-12-02 10:56:55,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 10:56:55,274 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 10:56:55,275 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 10:56:55,275 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 10:56:55,280 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 10:56:55,281 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:56:55" (1/1) ... [2024-12-02 10:56:55,281 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7676234f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:55, skipping insertion in model container [2024-12-02 10:56:55,282 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:56:55" (1/1) ... [2024-12-02 10:56:55,294 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 10:56:55,448 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-02 10:56:55,455 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 10:56:55,465 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 10:56:55,490 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 10:56:55,507 INFO L204 MainTranslator]: Completed translation [2024-12-02 10:56:55,507 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:55 WrapperNode [2024-12-02 10:56:55,507 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 10:56:55,508 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 10:56:55,508 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 10:56:55,509 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 10:56:55,515 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:55" (1/1) ... [2024-12-02 10:56:55,523 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:55" (1/1) ... [2024-12-02 10:56:55,545 INFO L138 Inliner]: procedures = 25, calls = 23, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 129 [2024-12-02 10:56:55,545 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 10:56:55,546 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 10:56:55,546 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 10:56:55,546 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 10:56:55,555 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:55" (1/1) ... [2024-12-02 10:56:55,555 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:55" (1/1) ... [2024-12-02 10:56:55,558 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:55" (1/1) ... [2024-12-02 10:56:55,572 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-12-02 10:56:55,573 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:55" (1/1) ... [2024-12-02 10:56:55,573 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:55" (1/1) ... [2024-12-02 10:56:55,581 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:55" (1/1) ... [2024-12-02 10:56:55,582 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:55" (1/1) ... [2024-12-02 10:56:55,586 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:55" (1/1) ... [2024-12-02 10:56:55,588 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:55" (1/1) ... [2024-12-02 10:56:55,589 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:55" (1/1) ... [2024-12-02 10:56:55,592 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 10:56:55,592 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 10:56:55,593 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 10:56:55,593 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 10:56:55,594 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:55" (1/1) ... [2024-12-02 10:56:55,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 10:56:55,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:56:55,621 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 10:56:55,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 10:56:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 10:56:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 10:56:55,647 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 10:56:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 10:56:55,647 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 10:56:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-12-02 10:56:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-12-02 10:56:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 10:56:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-12-02 10:56:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-12-02 10:56:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 10:56:55,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 10:56:55,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-12-02 10:56:55,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-12-02 10:56:55,649 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-12-02 10:56:55,735 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 10:56:55,736 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 10:56:56,037 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 10:56:56,037 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 10:56:56,251 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 10:56:56,252 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-12-02 10:56:56,252 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:56:56 BoogieIcfgContainer [2024-12-02 10:56:56,252 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 10:56:56,254 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 10:56:56,254 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 10:56:56,259 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 10:56:56,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 10:56:55" (1/3) ... [2024-12-02 10:56:56,259 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4650a6e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 10:56:56, skipping insertion in model container [2024-12-02 10:56:56,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:56:55" (2/3) ... [2024-12-02 10:56:56,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4650a6e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 10:56:56, skipping insertion in model container [2024-12-02 10:56:56,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:56:56" (3/3) ... [2024-12-02 10:56:56,261 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2024-12-02 10:56:56,276 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 10:56:56,277 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-counter-queue.wvr.c that has 3 procedures, 33 locations, 1 initial locations, 3 loop locations, and 8 error locations. [2024-12-02 10:56:56,277 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 10:56:56,335 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-12-02 10:56:56,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 35 transitions, 84 flow [2024-12-02 10:56:56,391 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2024-12-02 10:56:56,393 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-12-02 10:56:56,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 3/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 53 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2024-12-02 10:56:56,396 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 35 transitions, 84 flow [2024-12-02 10:56:56,399 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 32 transitions, 76 flow [2024-12-02 10:56:56,406 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 10:56:56,418 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;@19199941, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 10:56:56,418 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-12-02 10:56:56,421 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 10:56:56,421 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-12-02 10:56:56,421 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 10:56:56,422 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:56:56,422 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 10:56:56,423 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:56:56,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:56,428 INFO L85 PathProgramCache]: Analyzing trace with hash 446140, now seen corresponding path program 1 times [2024-12-02 10:56:56,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:56:56,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078319578] [2024-12-02 10:56:56,438 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:56,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:56,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:56:56,440 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:56:56,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 10:56:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:56,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 10:56:56,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:56:56,564 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 7 [2024-12-02 10:56:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:56,581 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:56:56,581 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:56:56,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078319578] [2024-12-02 10:56:56,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078319578] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:56:56,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:56:56,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-12-02 10:56:56,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488224691] [2024-12-02 10:56:56,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:56:56,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 10:56:56,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:56:56,614 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 10:56:56,615 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 10:56:56,634 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:56:56,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-12-02 10:56:56,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:56:56,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:56:56,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:56:56,752 INFO L124 PetriNetUnfolderBase]: 62/153 cut-off events. [2024-12-02 10:56:56,753 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-12-02 10:56:56,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 153 events. 62/153 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 606 event pairs, 42 based on Foata normal form. 1/140 useless extension candidates. Maximal degree in co-relation 240. Up to 109 conditions per place. [2024-12-02 10:56:56,756 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 17 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2024-12-02 10:56:56,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 108 flow [2024-12-02 10:56:56,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 10:56:56,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 10:56:56,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-12-02 10:56:56,765 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-12-02 10:56:56,766 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 60 transitions. [2024-12-02 10:56:56,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 108 flow [2024-12-02 10:56:56,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 100 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-12-02 10:56:56,772 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 66 flow [2024-12-02 10:56:56,774 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2024-12-02 10:56:56,777 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2024-12-02 10:56:56,777 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 66 flow [2024-12-02 10:56:56,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-12-02 10:56:56,777 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:56:56,777 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 10:56:56,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 10:56:56,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:56,978 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:56:56,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:56,979 INFO L85 PathProgramCache]: Analyzing trace with hash 446141, now seen corresponding path program 1 times [2024-12-02 10:56:56,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:56:56,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603205276] [2024-12-02 10:56:56,979 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:56,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:56,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:56:56,981 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:56:56,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 10:56:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:57,034 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 10:56:57,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:56:57,062 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 7 [2024-12-02 10:56:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:57,152 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:56:57,152 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:56:57,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603205276] [2024-12-02 10:56:57,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603205276] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:56:57,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:56:57,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 10:56:57,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457499764] [2024-12-02 10:56:57,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:56:57,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:56:57,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:56:57,154 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:56:57,154 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:56:57,190 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:56:57,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2024-12-02 10:56:57,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:56:57,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:56:57,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:56:57,408 INFO L124 PetriNetUnfolderBase]: 63/156 cut-off events. [2024-12-02 10:56:57,408 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-02 10:56:57,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 282 conditions, 156 events. 63/156 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 620 event pairs, 42 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 260. Up to 114 conditions per place. [2024-12-02 10:56:57,410 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 19 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2024-12-02 10:56:57,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 120 flow [2024-12-02 10:56:57,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 10:56:57,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 10:56:57,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-12-02 10:56:57,412 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-12-02 10:56:57,412 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 66 flow. Second operand 4 states and 76 transitions. [2024-12-02 10:56:57,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 120 flow [2024-12-02 10:56:57,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 32 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 10:56:57,414 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 89 flow [2024-12-02 10:56:57,414 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2024-12-02 10:56:57,415 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2024-12-02 10:56:57,415 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 89 flow [2024-12-02 10:56:57,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2024-12-02 10:56:57,415 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:56:57,415 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-12-02 10:56:57,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 10:56:57,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:57,616 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:56:57,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:57,616 INFO L85 PathProgramCache]: Analyzing trace with hash 428755192, now seen corresponding path program 1 times [2024-12-02 10:56:57,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:56:57,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637098372] [2024-12-02 10:56:57,617 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:57,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:57,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:56:57,618 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:56:57,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 10:56:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:57,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 10:56:57,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:56:57,686 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 7 [2024-12-02 10:56:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:57,821 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:56:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:58,012 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:56:58,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637098372] [2024-12-02 10:56:58,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637098372] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:56:58,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:56:58,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-12-02 10:56:58,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551908856] [2024-12-02 10:56:58,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:56:58,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 10:56:58,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:56:58,014 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 10:56:58,014 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-12-02 10:56:58,177 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:56:58,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 89 flow. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 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) [2024-12-02 10:56:58,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:56:58,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:56:58,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:56:58,726 INFO L124 PetriNetUnfolderBase]: 66/165 cut-off events. [2024-12-02 10:56:58,726 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-12-02 10:56:58,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 165 events. 66/165 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 673 event pairs, 42 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 267. Up to 117 conditions per place. [2024-12-02 10:56:58,728 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 19 selfloop transitions, 13 changer transitions 0/41 dead transitions. [2024-12-02 10:56:58,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 189 flow [2024-12-02 10:56:58,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 10:56:58,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-12-02 10:56:58,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-12-02 10:56:58,731 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-12-02 10:56:58,731 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 89 flow. Second operand 10 states and 165 transitions. [2024-12-02 10:56:58,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 189 flow [2024-12-02 10:56:58,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 10:56:58,733 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 166 flow [2024-12-02 10:56:58,734 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=166, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2024-12-02 10:56:58,734 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2024-12-02 10:56:58,735 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 166 flow [2024-12-02 10:56:58,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 8 states have internal predecessors, (114), 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) [2024-12-02 10:56:58,735 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:56:58,735 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-12-02 10:56:58,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 10:56:58,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:58,936 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:56:58,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:58,936 INFO L85 PathProgramCache]: Analyzing trace with hash 408917787, now seen corresponding path program 1 times [2024-12-02 10:56:58,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:56:58,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078012870] [2024-12-02 10:56:58,937 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:58,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:58,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:56:58,939 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:56:58,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 10:56:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:58,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 10:56:58,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:56:59,000 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 7 [2024-12-02 10:56:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:59,029 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:56:59,029 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:56:59,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078012870] [2024-12-02 10:56:59,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078012870] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:56:59,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:56:59,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 10:56:59,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325891030] [2024-12-02 10:56:59,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:56:59,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 10:56:59,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:56:59,030 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 10:56:59,030 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 10:56:59,073 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2024-12-02 10:56:59,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2024-12-02 10:56:59,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:56:59,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2024-12-02 10:56:59,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:56:59,167 INFO L124 PetriNetUnfolderBase]: 66/155 cut-off events. [2024-12-02 10:56:59,167 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-12-02 10:56:59,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 155 events. 66/155 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 573 event pairs, 42 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 297. Up to 112 conditions per place. [2024-12-02 10:56:59,169 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 25 selfloop transitions, 6 changer transitions 0/39 dead transitions. [2024-12-02 10:56:59,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 224 flow [2024-12-02 10:56:59,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 10:56:59,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 10:56:59,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-12-02 10:56:59,170 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-12-02 10:56:59,170 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 166 flow. Second operand 4 states and 65 transitions. [2024-12-02 10:56:59,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 224 flow [2024-12-02 10:56:59,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 194 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-12-02 10:56:59,173 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 144 flow [2024-12-02 10:56:59,173 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2024-12-02 10:56:59,174 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 7 predicate places. [2024-12-02 10:56:59,174 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 144 flow [2024-12-02 10:56:59,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2024-12-02 10:56:59,174 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:56:59,174 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-12-02 10:56:59,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 10:56:59,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:59,375 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:56:59,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:59,375 INFO L85 PathProgramCache]: Analyzing trace with hash 408917788, now seen corresponding path program 1 times [2024-12-02 10:56:59,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:56:59,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327989915] [2024-12-02 10:56:59,376 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:59,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:59,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:56:59,377 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:56:59,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 10:56:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:59,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 10:56:59,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:56:59,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:56:59,493 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:56:59,493 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:56:59,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327989915] [2024-12-02 10:56:59,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327989915] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:56:59,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:56:59,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 10:56:59,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648063597] [2024-12-02 10:56:59,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:56:59,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 10:56:59,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:56:59,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 10:56:59,495 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 10:56:59,521 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:56:59,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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) [2024-12-02 10:56:59,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:56:59,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:56:59,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:56:59,686 INFO L124 PetriNetUnfolderBase]: 116/270 cut-off events. [2024-12-02 10:56:59,686 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-12-02 10:56:59,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 270 events. 116/270 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1180 event pairs, 72 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 508. Up to 145 conditions per place. [2024-12-02 10:56:59,688 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 47 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-12-02 10:56:59,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 293 flow [2024-12-02 10:56:59,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 10:56:59,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 10:56:59,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-12-02 10:56:59,690 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6228571428571429 [2024-12-02 10:56:59,690 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 144 flow. Second operand 5 states and 109 transitions. [2024-12-02 10:56:59,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 293 flow [2024-12-02 10:56:59,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 10:56:59,692 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 162 flow [2024-12-02 10:56:59,692 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2024-12-02 10:56:59,693 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2024-12-02 10:56:59,693 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 162 flow [2024-12-02 10:56:59,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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) [2024-12-02 10:56:59,693 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:56:59,694 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:56:59,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 10:56:59,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:59,894 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:56:59,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:56:59,895 INFO L85 PathProgramCache]: Analyzing trace with hash 2117382407, now seen corresponding path program 1 times [2024-12-02 10:56:59,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:56:59,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388153506] [2024-12-02 10:56:59,895 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:56:59,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:56:59,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:56:59,896 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:56:59,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 10:56:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:56:59,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 10:56:59,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:00,009 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:57:00,009 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:00,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388153506] [2024-12-02 10:57:00,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388153506] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:57:00,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:57:00,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 10:57:00,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737934896] [2024-12-02 10:57:00,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:57:00,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 10:57:00,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:00,010 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 10:57:00,010 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 10:57:00,031 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:57:00,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:00,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:00,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:57:00,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:00,173 INFO L124 PetriNetUnfolderBase]: 100/221 cut-off events. [2024-12-02 10:57:00,173 INFO L125 PetriNetUnfolderBase]: For 73/82 co-relation queries the response was YES. [2024-12-02 10:57:00,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 221 events. 100/221 cut-off events. For 73/82 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 822 event pairs, 67 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 494. Up to 143 conditions per place. [2024-12-02 10:57:00,175 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 42 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2024-12-02 10:57:00,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 54 transitions, 295 flow [2024-12-02 10:57:00,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 10:57:00,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 10:57:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-12-02 10:57:00,176 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5942857142857143 [2024-12-02 10:57:00,176 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 162 flow. Second operand 5 states and 104 transitions. [2024-12-02 10:57:00,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 54 transitions, 295 flow [2024-12-02 10:57:00,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 54 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 10:57:00,178 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 182 flow [2024-12-02 10:57:00,179 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-12-02 10:57:00,179 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 15 predicate places. [2024-12-02 10:57:00,179 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 182 flow [2024-12-02 10:57:00,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:00,180 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:00,180 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:00,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 10:57:00,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:00,380 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:00,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:00,381 INFO L85 PathProgramCache]: Analyzing trace with hash -183980287, now seen corresponding path program 1 times [2024-12-02 10:57:00,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:00,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2038879343] [2024-12-02 10:57:00,381 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:57:00,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:00,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:00,383 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:00,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 10:57:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:57:00,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-12-02 10:57:00,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:00,444 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 7 [2024-12-02 10:57:00,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:00,670 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:57:00,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:00,978 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:00,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038879343] [2024-12-02 10:57:00,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038879343] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:57:00,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:57:00,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-12-02 10:57:00,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127456874] [2024-12-02 10:57:00,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:57:00,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 10:57:00,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:00,980 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 10:57:00,980 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-12-02 10:57:01,347 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-12-02 10:57:01,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 182 flow. Second operand has 12 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 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) [2024-12-02 10:57:01,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:01,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-12-02 10:57:01,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:02,344 INFO L124 PetriNetUnfolderBase]: 311/692 cut-off events. [2024-12-02 10:57:02,344 INFO L125 PetriNetUnfolderBase]: For 169/200 co-relation queries the response was YES. [2024-12-02 10:57:02,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1587 conditions, 692 events. 311/692 cut-off events. For 169/200 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3727 event pairs, 138 based on Foata normal form. 0/660 useless extension candidates. Maximal degree in co-relation 1390. Up to 163 conditions per place. [2024-12-02 10:57:02,348 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 79 selfloop transitions, 23 changer transitions 0/108 dead transitions. [2024-12-02 10:57:02,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 108 transitions, 564 flow [2024-12-02 10:57:02,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 10:57:02,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-02 10:57:02,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 255 transitions. [2024-12-02 10:57:02,350 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5604395604395604 [2024-12-02 10:57:02,350 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 182 flow. Second operand 13 states and 255 transitions. [2024-12-02 10:57:02,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 108 transitions, 564 flow [2024-12-02 10:57:02,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 108 transitions, 559 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 10:57:02,353 INFO L231 Difference]: Finished difference. Result has 63 places, 54 transitions, 274 flow [2024-12-02 10:57:02,353 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=274, PETRI_PLACES=63, PETRI_TRANSITIONS=54} [2024-12-02 10:57:02,354 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 27 predicate places. [2024-12-02 10:57:02,354 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 54 transitions, 274 flow [2024-12-02 10:57:02,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 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) [2024-12-02 10:57:02,354 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:02,354 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:02,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 10:57:02,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:02,555 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:02,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:02,555 INFO L85 PathProgramCache]: Analyzing trace with hash -721984596, now seen corresponding path program 1 times [2024-12-02 10:57:02,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:02,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288005797] [2024-12-02 10:57:02,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:57:02,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:02,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:02,557 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:02,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 10:57:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:57:02,607 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-12-02 10:57:02,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:02,618 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 7 [2024-12-02 10:57:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:02,832 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:57:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:03,122 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:03,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288005797] [2024-12-02 10:57:03,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288005797] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:57:03,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:57:03,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-12-02 10:57:03,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476034340] [2024-12-02 10:57:03,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:57:03,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 10:57:03,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:03,123 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 10:57:03,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-12-02 10:57:03,358 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-12-02 10:57:03,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 54 transitions, 274 flow. Second operand has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 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) [2024-12-02 10:57:03,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:03,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-12-02 10:57:03,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:04,418 INFO L124 PetriNetUnfolderBase]: 405/822 cut-off events. [2024-12-02 10:57:04,418 INFO L125 PetriNetUnfolderBase]: For 1032/1215 co-relation queries the response was YES. [2024-12-02 10:57:04,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2282 conditions, 822 events. 405/822 cut-off events. For 1032/1215 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4332 event pairs, 184 based on Foata normal form. 0/784 useless extension candidates. Maximal degree in co-relation 2070. Up to 179 conditions per place. [2024-12-02 10:57:04,422 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 88 selfloop transitions, 23 changer transitions 0/117 dead transitions. [2024-12-02 10:57:04,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 117 transitions, 746 flow [2024-12-02 10:57:04,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 10:57:04,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-12-02 10:57:04,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 251 transitions. [2024-12-02 10:57:04,424 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5516483516483517 [2024-12-02 10:57:04,424 INFO L175 Difference]: Start difference. First operand has 63 places, 54 transitions, 274 flow. Second operand 13 states and 251 transitions. [2024-12-02 10:57:04,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 117 transitions, 746 flow [2024-12-02 10:57:04,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 117 transitions, 725 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-12-02 10:57:04,428 INFO L231 Difference]: Finished difference. Result has 73 places, 65 transitions, 356 flow [2024-12-02 10:57:04,429 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=356, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2024-12-02 10:57:04,429 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 37 predicate places. [2024-12-02 10:57:04,430 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 356 flow [2024-12-02 10:57:04,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 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) [2024-12-02 10:57:04,430 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:04,430 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-12-02 10:57:04,437 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 10:57:04,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:04,630 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:04,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:04,631 INFO L85 PathProgramCache]: Analyzing trace with hash 690857769, now seen corresponding path program 2 times [2024-12-02 10:57:04,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:04,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370202679] [2024-12-02 10:57:04,631 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:57:04,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:04,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:04,633 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:04,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 10:57:04,688 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:57:04,688 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:04,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 10:57:04,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:04,699 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 7 [2024-12-02 10:57:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:04,947 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:57:05,649 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:05,649 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:05,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370202679] [2024-12-02 10:57:05,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370202679] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:57:05,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:57:05,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-12-02 10:57:05,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467492677] [2024-12-02 10:57:05,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:57:05,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 10:57:05,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:05,650 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 10:57:05,650 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-12-02 10:57:06,028 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:57:06,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 65 transitions, 356 flow. Second operand has 14 states, 14 states have (on average 14.571428571428571) internal successors, (204), 14 states have internal predecessors, (204), 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) [2024-12-02 10:57:06,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:06,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:57:06,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:08,359 INFO L124 PetriNetUnfolderBase]: 359/798 cut-off events. [2024-12-02 10:57:08,359 INFO L125 PetriNetUnfolderBase]: For 1148/1270 co-relation queries the response was YES. [2024-12-02 10:57:08,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2516 conditions, 798 events. 359/798 cut-off events. For 1148/1270 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4442 event pairs, 232 based on Foata normal form. 6/796 useless extension candidates. Maximal degree in co-relation 2209. Up to 601 conditions per place. [2024-12-02 10:57:08,363 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 45 selfloop transitions, 31 changer transitions 0/83 dead transitions. [2024-12-02 10:57:08,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 83 transitions, 646 flow [2024-12-02 10:57:08,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-12-02 10:57:08,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-12-02 10:57:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 342 transitions. [2024-12-02 10:57:08,365 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44415584415584414 [2024-12-02 10:57:08,365 INFO L175 Difference]: Start difference. First operand has 73 places, 65 transitions, 356 flow. Second operand 22 states and 342 transitions. [2024-12-02 10:57:08,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 83 transitions, 646 flow [2024-12-02 10:57:08,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 83 transitions, 614 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-12-02 10:57:08,369 INFO L231 Difference]: Finished difference. Result has 95 places, 83 transitions, 554 flow [2024-12-02 10:57:08,370 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=554, PETRI_PLACES=95, PETRI_TRANSITIONS=83} [2024-12-02 10:57:08,370 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 59 predicate places. [2024-12-02 10:57:08,370 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 83 transitions, 554 flow [2024-12-02 10:57:08,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.571428571428571) internal successors, (204), 14 states have internal predecessors, (204), 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) [2024-12-02 10:57:08,371 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:08,371 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:08,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 10:57:08,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:08,572 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:08,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:08,572 INFO L85 PathProgramCache]: Analyzing trace with hash -738270106, now seen corresponding path program 1 times [2024-12-02 10:57:08,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:08,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203340029] [2024-12-02 10:57:08,572 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:57:08,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:08,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:08,574 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:08,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 10:57:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:57:08,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 10:57:08,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:08,729 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:57:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:08,831 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:08,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203340029] [2024-12-02 10:57:08,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203340029] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:57:08,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:57:08,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2024-12-02 10:57:08,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653972588] [2024-12-02 10:57:08,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:57:08,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 10:57:08,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:08,832 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 10:57:08,833 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-12-02 10:57:08,924 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:57:08,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 83 transitions, 554 flow. Second operand has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 12 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:08,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:08,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:57:08,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:09,304 INFO L124 PetriNetUnfolderBase]: 397/821 cut-off events. [2024-12-02 10:57:09,304 INFO L125 PetriNetUnfolderBase]: For 995/1067 co-relation queries the response was YES. [2024-12-02 10:57:09,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2652 conditions, 821 events. 397/821 cut-off events. For 995/1067 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4223 event pairs, 193 based on Foata normal form. 14/829 useless extension candidates. Maximal degree in co-relation 2587. Up to 394 conditions per place. [2024-12-02 10:57:09,307 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 77 selfloop transitions, 29 changer transitions 0/113 dead transitions. [2024-12-02 10:57:09,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 113 transitions, 896 flow [2024-12-02 10:57:09,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 10:57:09,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 10:57:09,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-12-02 10:57:09,309 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-12-02 10:57:09,309 INFO L175 Difference]: Start difference. First operand has 95 places, 83 transitions, 554 flow. Second operand 8 states and 162 transitions. [2024-12-02 10:57:09,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 113 transitions, 896 flow [2024-12-02 10:57:09,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 113 transitions, 816 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-12-02 10:57:09,314 INFO L231 Difference]: Finished difference. Result has 93 places, 82 transitions, 538 flow [2024-12-02 10:57:09,314 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=538, PETRI_PLACES=93, PETRI_TRANSITIONS=82} [2024-12-02 10:57:09,314 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 57 predicate places. [2024-12-02 10:57:09,314 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 82 transitions, 538 flow [2024-12-02 10:57:09,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 12 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:09,315 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:09,315 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:09,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 10:57:09,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:09,515 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:09,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:09,516 INFO L85 PathProgramCache]: Analyzing trace with hash 2104713980, now seen corresponding path program 1 times [2024-12-02 10:57:09,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:09,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819913719] [2024-12-02 10:57:09,516 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:57:09,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:09,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:09,518 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:09,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 10:57:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:57:09,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-12-02 10:57:09,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:09,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:09,582 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:57:09,582 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:09,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819913719] [2024-12-02 10:57:09,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819913719] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:57:09,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:57:09,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 10:57:09,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144964275] [2024-12-02 10:57:09,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:57:09,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 10:57:09,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:09,582 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 10:57:09,582 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 10:57:09,584 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-12-02 10:57:09,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 82 transitions, 538 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2024-12-02 10:57:09,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:09,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-12-02 10:57:09,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:09,739 INFO L124 PetriNetUnfolderBase]: 555/1131 cut-off events. [2024-12-02 10:57:09,740 INFO L125 PetriNetUnfolderBase]: For 1759/1908 co-relation queries the response was YES. [2024-12-02 10:57:09,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3700 conditions, 1131 events. 555/1131 cut-off events. For 1759/1908 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6195 event pairs, 167 based on Foata normal form. 4/1134 useless extension candidates. Maximal degree in co-relation 3636. Up to 637 conditions per place. [2024-12-02 10:57:09,744 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 92 selfloop transitions, 3 changer transitions 6/107 dead transitions. [2024-12-02 10:57:09,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 107 transitions, 863 flow [2024-12-02 10:57:09,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 10:57:09,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 10:57:09,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-12-02 10:57:09,745 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2024-12-02 10:57:09,745 INFO L175 Difference]: Start difference. First operand has 93 places, 82 transitions, 538 flow. Second operand 3 states and 71 transitions. [2024-12-02 10:57:09,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 107 transitions, 863 flow [2024-12-02 10:57:09,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 107 transitions, 844 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-12-02 10:57:09,753 INFO L231 Difference]: Finished difference. Result has 93 places, 79 transitions, 502 flow [2024-12-02 10:57:09,753 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=502, PETRI_PLACES=93, PETRI_TRANSITIONS=79} [2024-12-02 10:57:09,753 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 57 predicate places. [2024-12-02 10:57:09,754 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 79 transitions, 502 flow [2024-12-02 10:57:09,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2024-12-02 10:57:09,754 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:09,754 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:09,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 10:57:09,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:09,954 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:09,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:09,955 INFO L85 PathProgramCache]: Analyzing trace with hash -18805359, now seen corresponding path program 1 times [2024-12-02 10:57:09,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:09,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013927039] [2024-12-02 10:57:09,955 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:57:09,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:09,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:09,957 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:09,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 10:57:10,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:57:10,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 10:57:10,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:10,109 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:57:10,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:10,208 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:10,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013927039] [2024-12-02 10:57:10,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013927039] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:57:10,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:57:10,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2024-12-02 10:57:10,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570643377] [2024-12-02 10:57:10,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:57:10,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 10:57:10,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:10,209 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 10:57:10,209 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-12-02 10:57:10,303 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:57:10,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 79 transitions, 502 flow. Second operand has 12 states, 12 states have (on average 15.0) internal successors, (180), 12 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:10,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:10,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:57:10,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:10,634 INFO L124 PetriNetUnfolderBase]: 475/958 cut-off events. [2024-12-02 10:57:10,634 INFO L125 PetriNetUnfolderBase]: For 1580/1784 co-relation queries the response was YES. [2024-12-02 10:57:10,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3227 conditions, 958 events. 475/958 cut-off events. For 1580/1784 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5211 event pairs, 293 based on Foata normal form. 13/966 useless extension candidates. Maximal degree in co-relation 3171. Up to 580 conditions per place. [2024-12-02 10:57:10,641 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 65 selfloop transitions, 26 changer transitions 0/100 dead transitions. [2024-12-02 10:57:10,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 100 transitions, 778 flow [2024-12-02 10:57:10,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 10:57:10,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 10:57:10,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-12-02 10:57:10,643 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-12-02 10:57:10,643 INFO L175 Difference]: Start difference. First operand has 93 places, 79 transitions, 502 flow. Second operand 8 states and 159 transitions. [2024-12-02 10:57:10,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 100 transitions, 778 flow [2024-12-02 10:57:10,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 100 transitions, 717 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-12-02 10:57:10,651 INFO L231 Difference]: Finished difference. Result has 89 places, 78 transitions, 511 flow [2024-12-02 10:57:10,651 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=511, PETRI_PLACES=89, PETRI_TRANSITIONS=78} [2024-12-02 10:57:10,651 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 53 predicate places. [2024-12-02 10:57:10,652 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 78 transitions, 511 flow [2024-12-02 10:57:10,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.0) internal successors, (180), 12 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:10,652 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:10,652 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:10,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 10:57:10,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:10,852 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:10,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:10,853 INFO L85 PathProgramCache]: Analyzing trace with hash -136653008, now seen corresponding path program 2 times [2024-12-02 10:57:10,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:10,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1258230483] [2024-12-02 10:57:10,853 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:57:10,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:10,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:10,855 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:10,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 10:57:10,898 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 10:57:10,898 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:10,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-12-02 10:57:10,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:10,913 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 7 [2024-12-02 10:57:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-12-02 10:57:11,078 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:57:11,078 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:11,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258230483] [2024-12-02 10:57:11,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258230483] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:57:11,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:57:11,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 10:57:11,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958906769] [2024-12-02 10:57:11,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:57:11,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 10:57:11,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:11,079 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 10:57:11,079 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:57:11,223 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-12-02 10:57:11,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 78 transitions, 511 flow. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:11,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:11,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-12-02 10:57:11,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:11,561 INFO L124 PetriNetUnfolderBase]: 593/1192 cut-off events. [2024-12-02 10:57:11,561 INFO L125 PetriNetUnfolderBase]: For 1561/1638 co-relation queries the response was YES. [2024-12-02 10:57:11,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3779 conditions, 1192 events. 593/1192 cut-off events. For 1561/1638 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 6696 event pairs, 239 based on Foata normal form. 38/1216 useless extension candidates. Maximal degree in co-relation 3725. Up to 584 conditions per place. [2024-12-02 10:57:11,570 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 85 selfloop transitions, 25 changer transitions 0/118 dead transitions. [2024-12-02 10:57:11,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 118 transitions, 932 flow [2024-12-02 10:57:11,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 10:57:11,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 10:57:11,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-12-02 10:57:11,571 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-12-02 10:57:11,571 INFO L175 Difference]: Start difference. First operand has 89 places, 78 transitions, 511 flow. Second operand 6 states and 114 transitions. [2024-12-02 10:57:11,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 118 transitions, 932 flow [2024-12-02 10:57:11,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 118 transitions, 858 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-12-02 10:57:11,578 INFO L231 Difference]: Finished difference. Result has 90 places, 86 transitions, 584 flow [2024-12-02 10:57:11,578 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=584, PETRI_PLACES=90, PETRI_TRANSITIONS=86} [2024-12-02 10:57:11,579 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 54 predicate places. [2024-12-02 10:57:11,579 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 86 transitions, 584 flow [2024-12-02 10:57:11,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:11,579 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:11,579 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:11,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 10:57:11,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:11,780 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:11,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:11,780 INFO L85 PathProgramCache]: Analyzing trace with hash -819086197, now seen corresponding path program 2 times [2024-12-02 10:57:11,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:11,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343482513] [2024-12-02 10:57:11,780 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:57:11,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:11,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:11,782 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:11,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 10:57:11,839 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:57:11,840 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:11,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-12-02 10:57:11,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:11,850 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 7 [2024-12-02 10:57:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:12,155 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:57:12,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:12,665 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:12,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343482513] [2024-12-02 10:57:12,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343482513] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:57:12,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:57:12,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2024-12-02 10:57:12,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909934378] [2024-12-02 10:57:12,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:57:12,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-12-02 10:57:12,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:12,666 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-12-02 10:57:12,666 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2024-12-02 10:57:13,160 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-12-02 10:57:13,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 86 transitions, 584 flow. Second operand has 16 states, 16 states have (on average 13.375) internal successors, (214), 16 states have internal predecessors, (214), 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) [2024-12-02 10:57:13,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:13,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-12-02 10:57:13,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:15,204 INFO L124 PetriNetUnfolderBase]: 1013/2112 cut-off events. [2024-12-02 10:57:15,204 INFO L125 PetriNetUnfolderBase]: For 4820/5070 co-relation queries the response was YES. [2024-12-02 10:57:15,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7382 conditions, 2112 events. 1013/2112 cut-off events. For 4820/5070 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 13878 event pairs, 381 based on Foata normal form. 46/2121 useless extension candidates. Maximal degree in co-relation 7327. Up to 484 conditions per place. [2024-12-02 10:57:15,214 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 152 selfloop transitions, 49 changer transitions 0/210 dead transitions. [2024-12-02 10:57:15,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 210 transitions, 1629 flow [2024-12-02 10:57:15,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-12-02 10:57:15,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-12-02 10:57:15,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 359 transitions. [2024-12-02 10:57:15,217 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5398496240601504 [2024-12-02 10:57:15,217 INFO L175 Difference]: Start difference. First operand has 90 places, 86 transitions, 584 flow. Second operand 19 states and 359 transitions. [2024-12-02 10:57:15,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 210 transitions, 1629 flow [2024-12-02 10:57:15,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 210 transitions, 1586 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-12-02 10:57:15,228 INFO L231 Difference]: Finished difference. Result has 110 places, 103 transitions, 813 flow [2024-12-02 10:57:15,228 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=813, PETRI_PLACES=110, PETRI_TRANSITIONS=103} [2024-12-02 10:57:15,229 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 74 predicate places. [2024-12-02 10:57:15,229 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 103 transitions, 813 flow [2024-12-02 10:57:15,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.375) internal successors, (214), 16 states have internal predecessors, (214), 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) [2024-12-02 10:57:15,229 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:15,229 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:15,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 10:57:15,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:15,430 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:15,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:15,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1809857563, now seen corresponding path program 2 times [2024-12-02 10:57:15,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:15,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823139125] [2024-12-02 10:57:15,430 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:57:15,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:15,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:15,432 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:15,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 10:57:15,481 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 10:57:15,481 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:15,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-12-02 10:57:15,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:15,490 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 7 [2024-12-02 10:57:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-12-02 10:57:15,643 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:57:15,643 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:15,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823139125] [2024-12-02 10:57:15,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823139125] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:57:15,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:57:15,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 10:57:15,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554514950] [2024-12-02 10:57:15,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:57:15,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 10:57:15,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:15,644 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 10:57:15,644 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:57:15,715 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-12-02 10:57:15,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 103 transitions, 813 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:15,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:15,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-12-02 10:57:15,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:16,160 INFO L124 PetriNetUnfolderBase]: 1542/2991 cut-off events. [2024-12-02 10:57:16,160 INFO L125 PetriNetUnfolderBase]: For 11462/11744 co-relation queries the response was YES. [2024-12-02 10:57:16,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11764 conditions, 2991 events. 1542/2991 cut-off events. For 11462/11744 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 19091 event pairs, 686 based on Foata normal form. 95/3030 useless extension candidates. Maximal degree in co-relation 11702. Up to 1614 conditions per place. [2024-12-02 10:57:16,176 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 142 selfloop transitions, 31 changer transitions 0/182 dead transitions. [2024-12-02 10:57:16,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 182 transitions, 1844 flow [2024-12-02 10:57:16,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 10:57:16,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 10:57:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-12-02 10:57:16,177 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-12-02 10:57:16,177 INFO L175 Difference]: Start difference. First operand has 110 places, 103 transitions, 813 flow. Second operand 6 states and 112 transitions. [2024-12-02 10:57:16,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 182 transitions, 1844 flow [2024-12-02 10:57:16,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 182 transitions, 1772 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-12-02 10:57:16,197 INFO L231 Difference]: Finished difference. Result has 110 places, 117 transitions, 995 flow [2024-12-02 10:57:16,197 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=995, PETRI_PLACES=110, PETRI_TRANSITIONS=117} [2024-12-02 10:57:16,198 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 74 predicate places. [2024-12-02 10:57:16,198 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 117 transitions, 995 flow [2024-12-02 10:57:16,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:16,198 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:16,198 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:16,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 10:57:16,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:16,398 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:16,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:16,399 INFO L85 PathProgramCache]: Analyzing trace with hash -373657482, now seen corresponding path program 2 times [2024-12-02 10:57:16,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:16,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163116438] [2024-12-02 10:57:16,399 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:57:16,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:16,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:16,400 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:16,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 10:57:16,463 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:57:16,464 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:16,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 10:57:16,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:16,473 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 7 [2024-12-02 10:57:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:16,763 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:57:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:17,126 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:17,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163116438] [2024-12-02 10:57:17,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163116438] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:57:17,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:57:17,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-12-02 10:57:17,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381748905] [2024-12-02 10:57:17,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:57:17,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 10:57:17,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:17,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 10:57:17,127 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-12-02 10:57:17,816 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-12-02 10:57:17,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 117 transitions, 995 flow. Second operand has 14 states, 14 states have (on average 13.857142857142858) internal successors, (194), 14 states have internal predecessors, (194), 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) [2024-12-02 10:57:17,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:17,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-12-02 10:57:17,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:18,913 INFO L124 PetriNetUnfolderBase]: 1741/3508 cut-off events. [2024-12-02 10:57:18,913 INFO L125 PetriNetUnfolderBase]: For 15847/16301 co-relation queries the response was YES. [2024-12-02 10:57:18,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14912 conditions, 3508 events. 1741/3508 cut-off events. For 15847/16301 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 23559 event pairs, 584 based on Foata normal form. 94/3511 useless extension candidates. Maximal degree in co-relation 14848. Up to 1188 conditions per place. [2024-12-02 10:57:18,929 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 191 selfloop transitions, 32 changer transitions 0/233 dead transitions. [2024-12-02 10:57:18,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 233 transitions, 2436 flow [2024-12-02 10:57:18,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 10:57:18,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-12-02 10:57:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-12-02 10:57:18,931 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5298701298701298 [2024-12-02 10:57:18,931 INFO L175 Difference]: Start difference. First operand has 110 places, 117 transitions, 995 flow. Second operand 11 states and 204 transitions. [2024-12-02 10:57:18,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 233 transitions, 2436 flow [2024-12-02 10:57:18,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 233 transitions, 2401 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-12-02 10:57:18,957 INFO L231 Difference]: Finished difference. Result has 119 places, 124 transitions, 1118 flow [2024-12-02 10:57:18,957 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1118, PETRI_PLACES=119, PETRI_TRANSITIONS=124} [2024-12-02 10:57:18,957 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 83 predicate places. [2024-12-02 10:57:18,957 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 124 transitions, 1118 flow [2024-12-02 10:57:18,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.857142857142858) internal successors, (194), 14 states have internal predecessors, (194), 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) [2024-12-02 10:57:18,957 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:18,958 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-12-02 10:57:18,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-02 10:57:19,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:19,158 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:19,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:19,158 INFO L85 PathProgramCache]: Analyzing trace with hash -764535568, now seen corresponding path program 3 times [2024-12-02 10:57:19,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:19,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313830608] [2024-12-02 10:57:19,159 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:57:19,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:19,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:19,160 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:19,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 10:57:19,229 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 10:57:19,229 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:19,231 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-12-02 10:57:19,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:19,402 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:57:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:19,639 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:19,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313830608] [2024-12-02 10:57:19,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313830608] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:57:19,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:57:19,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2024-12-02 10:57:19,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016609097] [2024-12-02 10:57:19,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:57:19,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 10:57:19,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:19,640 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 10:57:19,640 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2024-12-02 10:57:19,885 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:57:19,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 124 transitions, 1118 flow. Second operand has 18 states, 18 states have (on average 14.666666666666666) internal successors, (264), 18 states have internal predecessors, (264), 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) [2024-12-02 10:57:19,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:19,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:57:19,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:21,056 INFO L124 PetriNetUnfolderBase]: 1789/3493 cut-off events. [2024-12-02 10:57:21,056 INFO L125 PetriNetUnfolderBase]: For 17870/18161 co-relation queries the response was YES. [2024-12-02 10:57:21,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15922 conditions, 3493 events. 1789/3493 cut-off events. For 17870/18161 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 22774 event pairs, 943 based on Foata normal form. 86/3488 useless extension candidates. Maximal degree in co-relation 15856. Up to 1982 conditions per place. [2024-12-02 10:57:21,072 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 168 selfloop transitions, 31 changer transitions 0/209 dead transitions. [2024-12-02 10:57:21,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 209 transitions, 2138 flow [2024-12-02 10:57:21,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 10:57:21,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-12-02 10:57:21,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 284 transitions. [2024-12-02 10:57:21,073 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5795918367346938 [2024-12-02 10:57:21,073 INFO L175 Difference]: Start difference. First operand has 119 places, 124 transitions, 1118 flow. Second operand 14 states and 284 transitions. [2024-12-02 10:57:21,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 209 transitions, 2138 flow [2024-12-02 10:57:21,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 209 transitions, 2074 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-12-02 10:57:21,108 INFO L231 Difference]: Finished difference. Result has 128 places, 120 transitions, 1122 flow [2024-12-02 10:57:21,108 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1038, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1122, PETRI_PLACES=128, PETRI_TRANSITIONS=120} [2024-12-02 10:57:21,109 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 92 predicate places. [2024-12-02 10:57:21,109 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 120 transitions, 1122 flow [2024-12-02 10:57:21,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.666666666666666) internal successors, (264), 18 states have internal predecessors, (264), 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) [2024-12-02 10:57:21,109 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:21,109 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2024-12-02 10:57:21,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-02 10:57:21,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:21,310 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:21,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:21,310 INFO L85 PathProgramCache]: Analyzing trace with hash 442598741, now seen corresponding path program 4 times [2024-12-02 10:57:21,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:21,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810186987] [2024-12-02 10:57:21,310 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:57:21,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:21,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:21,312 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:21,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-02 10:57:21,402 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:57:21,402 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:21,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-12-02 10:57:21,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:21,415 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 7 [2024-12-02 10:57:21,906 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:21,906 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:57:23,126 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:23,126 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:23,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810186987] [2024-12-02 10:57:23,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810186987] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:57:23,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:57:23,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2024-12-02 10:57:23,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743238848] [2024-12-02 10:57:23,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:57:23,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-12-02 10:57:23,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:23,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-12-02 10:57:23,127 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-12-02 10:57:24,637 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-12-02 10:57:24,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 120 transitions, 1122 flow. Second operand has 21 states, 21 states have (on average 13.428571428571429) internal successors, (282), 21 states have internal predecessors, (282), 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) [2024-12-02 10:57:24,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:24,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-12-02 10:57:24,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:29,422 INFO L124 PetriNetUnfolderBase]: 2766/5465 cut-off events. [2024-12-02 10:57:29,422 INFO L125 PetriNetUnfolderBase]: For 33227/33816 co-relation queries the response was YES. [2024-12-02 10:57:29,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25064 conditions, 5465 events. 2766/5465 cut-off events. For 33227/33816 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 37700 event pairs, 753 based on Foata normal form. 154/5453 useless extension candidates. Maximal degree in co-relation 24995. Up to 1285 conditions per place. [2024-12-02 10:57:29,448 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 295 selfloop transitions, 82 changer transitions 0/387 dead transitions. [2024-12-02 10:57:29,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 387 transitions, 4121 flow [2024-12-02 10:57:29,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-12-02 10:57:29,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-12-02 10:57:29,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 509 transitions. [2024-12-02 10:57:29,450 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5593406593406594 [2024-12-02 10:57:29,450 INFO L175 Difference]: Start difference. First operand has 128 places, 120 transitions, 1122 flow. Second operand 26 states and 509 transitions. [2024-12-02 10:57:29,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 387 transitions, 4121 flow [2024-12-02 10:57:29,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 387 transitions, 4030 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-12-02 10:57:29,513 INFO L231 Difference]: Finished difference. Result has 149 places, 156 transitions, 1740 flow [2024-12-02 10:57:29,513 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1031, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1740, PETRI_PLACES=149, PETRI_TRANSITIONS=156} [2024-12-02 10:57:29,513 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 113 predicate places. [2024-12-02 10:57:29,513 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 156 transitions, 1740 flow [2024-12-02 10:57:29,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 13.428571428571429) internal successors, (282), 21 states have internal predecessors, (282), 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) [2024-12-02 10:57:29,513 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:29,513 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:29,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-12-02 10:57:29,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:29,714 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:29,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:29,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1369660069, now seen corresponding path program 3 times [2024-12-02 10:57:29,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:29,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373882993] [2024-12-02 10:57:29,715 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:57:29,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:29,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:29,716 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:29,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-02 10:57:29,789 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 10:57:29,789 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:29,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-12-02 10:57:29,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:29,993 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:57:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:30,257 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:30,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373882993] [2024-12-02 10:57:30,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373882993] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:57:30,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:57:30,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2024-12-02 10:57:30,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70464082] [2024-12-02 10:57:30,257 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:57:30,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 10:57:30,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:30,258 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 10:57:30,258 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2024-12-02 10:57:30,564 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:57:30,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 156 transitions, 1740 flow. Second operand has 18 states, 18 states have (on average 14.88888888888889) internal successors, (268), 18 states have internal predecessors, (268), 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) [2024-12-02 10:57:30,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:30,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:57:30,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:31,994 INFO L124 PetriNetUnfolderBase]: 2940/5615 cut-off events. [2024-12-02 10:57:31,994 INFO L125 PetriNetUnfolderBase]: For 46779/47319 co-relation queries the response was YES. [2024-12-02 10:57:32,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28600 conditions, 5615 events. 2940/5615 cut-off events. For 46779/47319 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 37140 event pairs, 1747 based on Foata normal form. 57/5524 useless extension candidates. Maximal degree in co-relation 28523. Up to 3733 conditions per place. [2024-12-02 10:57:32,027 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 179 selfloop transitions, 31 changer transitions 0/221 dead transitions. [2024-12-02 10:57:32,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 221 transitions, 2630 flow [2024-12-02 10:57:32,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 10:57:32,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-12-02 10:57:32,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 279 transitions. [2024-12-02 10:57:32,028 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5693877551020409 [2024-12-02 10:57:32,029 INFO L175 Difference]: Start difference. First operand has 149 places, 156 transitions, 1740 flow. Second operand 14 states and 279 transitions. [2024-12-02 10:57:32,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 221 transitions, 2630 flow [2024-12-02 10:57:32,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 221 transitions, 2554 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-12-02 10:57:32,157 INFO L231 Difference]: Finished difference. Result has 158 places, 160 transitions, 1792 flow [2024-12-02 10:57:32,157 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1664, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1792, PETRI_PLACES=158, PETRI_TRANSITIONS=160} [2024-12-02 10:57:32,157 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 122 predicate places. [2024-12-02 10:57:32,157 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 160 transitions, 1792 flow [2024-12-02 10:57:32,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.88888888888889) internal successors, (268), 18 states have internal predecessors, (268), 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) [2024-12-02 10:57:32,157 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:32,157 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:32,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-02 10:57:32,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:32,358 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:32,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:32,358 INFO L85 PathProgramCache]: Analyzing trace with hash 824600896, now seen corresponding path program 1 times [2024-12-02 10:57:32,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:32,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330832632] [2024-12-02 10:57:32,359 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:57:32,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:32,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:32,361 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:32,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-02 10:57:32,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:57:32,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 10:57:32,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:57:32,457 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:57:32,457 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:32,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330832632] [2024-12-02 10:57:32,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330832632] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:57:32,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:57:32,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 10:57:32,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494590447] [2024-12-02 10:57:32,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:57:32,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 10:57:32,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:32,458 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 10:57:32,458 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:57:32,481 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:57:32,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 160 transitions, 1792 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:32,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:32,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:57:32,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:33,432 INFO L124 PetriNetUnfolderBase]: 3002/5865 cut-off events. [2024-12-02 10:57:33,432 INFO L125 PetriNetUnfolderBase]: For 45170/45543 co-relation queries the response was YES. [2024-12-02 10:57:33,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29652 conditions, 5865 events. 3002/5865 cut-off events. For 45170/45543 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 39806 event pairs, 1229 based on Foata normal form. 17/5769 useless extension candidates. Maximal degree in co-relation 29569. Up to 3100 conditions per place. [2024-12-02 10:57:33,473 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 186 selfloop transitions, 18 changer transitions 13/228 dead transitions. [2024-12-02 10:57:33,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 228 transitions, 2824 flow [2024-12-02 10:57:33,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 10:57:33,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 10:57:33,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-12-02 10:57:33,474 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2024-12-02 10:57:33,474 INFO L175 Difference]: Start difference. First operand has 158 places, 160 transitions, 1792 flow. Second operand 6 states and 124 transitions. [2024-12-02 10:57:33,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 228 transitions, 2824 flow [2024-12-02 10:57:33,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 228 transitions, 2733 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-12-02 10:57:33,573 INFO L231 Difference]: Finished difference. Result has 156 places, 160 transitions, 1784 flow [2024-12-02 10:57:33,573 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1729, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1784, PETRI_PLACES=156, PETRI_TRANSITIONS=160} [2024-12-02 10:57:33,574 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 120 predicate places. [2024-12-02 10:57:33,574 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 160 transitions, 1784 flow [2024-12-02 10:57:33,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:33,574 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:33,574 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:33,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-12-02 10:57:33,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:33,775 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:33,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:33,775 INFO L85 PathProgramCache]: Analyzing trace with hash 56187576, now seen corresponding path program 2 times [2024-12-02 10:57:33,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:33,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151974205] [2024-12-02 10:57:33,775 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:57:33,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:33,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:33,777 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:33,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-12-02 10:57:33,829 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 10:57:33,830 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:33,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 10:57:33,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:33,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:57:33,893 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:57:33,893 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:33,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151974205] [2024-12-02 10:57:33,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151974205] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:57:33,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:57:33,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 10:57:33,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958261442] [2024-12-02 10:57:33,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:57:33,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 10:57:33,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:33,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 10:57:33,894 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:57:33,909 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:57:33,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 160 transitions, 1784 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:33,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:33,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:57:33,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:34,887 INFO L124 PetriNetUnfolderBase]: 3344/6599 cut-off events. [2024-12-02 10:57:34,887 INFO L125 PetriNetUnfolderBase]: For 57179/58704 co-relation queries the response was YES. [2024-12-02 10:57:34,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33550 conditions, 6599 events. 3344/6599 cut-off events. For 57179/58704 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 47863 event pairs, 428 based on Foata normal form. 110/6546 useless extension candidates. Maximal degree in co-relation 33467. Up to 2470 conditions per place. [2024-12-02 10:57:34,920 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 327 selfloop transitions, 42 changer transitions 5/385 dead transitions. [2024-12-02 10:57:34,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 385 transitions, 5276 flow [2024-12-02 10:57:34,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 10:57:34,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 10:57:34,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-12-02 10:57:34,921 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-12-02 10:57:34,921 INFO L175 Difference]: Start difference. First operand has 156 places, 160 transitions, 1784 flow. Second operand 8 states and 162 transitions. [2024-12-02 10:57:34,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 385 transitions, 5276 flow [2024-12-02 10:57:35,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 385 transitions, 5131 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-12-02 10:57:35,013 INFO L231 Difference]: Finished difference. Result has 163 places, 189 transitions, 2305 flow [2024-12-02 10:57:35,013 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1745, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2305, PETRI_PLACES=163, PETRI_TRANSITIONS=189} [2024-12-02 10:57:35,014 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 127 predicate places. [2024-12-02 10:57:35,014 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 189 transitions, 2305 flow [2024-12-02 10:57:35,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:35,014 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:35,014 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:35,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-12-02 10:57:35,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:35,215 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:35,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:35,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1639250242, now seen corresponding path program 1 times [2024-12-02 10:57:35,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:35,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13008225] [2024-12-02 10:57:35,215 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:57:35,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:35,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:35,217 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:35,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-12-02 10:57:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:57:35,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 10:57:35,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:57:35,322 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:57:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:57:35,362 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:35,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13008225] [2024-12-02 10:57:35,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13008225] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 10:57:35,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:57:35,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-12-02 10:57:35,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848497174] [2024-12-02 10:57:35,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:57:35,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 10:57:35,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:35,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 10:57:35,363 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-12-02 10:57:35,382 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-12-02 10:57:35,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 189 transitions, 2305 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 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) [2024-12-02 10:57:35,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:35,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-12-02 10:57:35,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:36,534 INFO L124 PetriNetUnfolderBase]: 4182/8032 cut-off events. [2024-12-02 10:57:36,534 INFO L125 PetriNetUnfolderBase]: For 68388/68412 co-relation queries the response was YES. [2024-12-02 10:57:36,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42405 conditions, 8032 events. 4182/8032 cut-off events. For 68388/68412 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 56682 event pairs, 375 based on Foata normal form. 113/8061 useless extension candidates. Maximal degree in co-relation 42318. Up to 3070 conditions per place. [2024-12-02 10:57:36,576 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 243 selfloop transitions, 83 changer transitions 0/335 dead transitions. [2024-12-02 10:57:36,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 335 transitions, 4673 flow [2024-12-02 10:57:36,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 10:57:36,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 10:57:36,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-12-02 10:57:36,577 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-12-02 10:57:36,577 INFO L175 Difference]: Start difference. First operand has 163 places, 189 transitions, 2305 flow. Second operand 7 states and 140 transitions. [2024-12-02 10:57:36,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 335 transitions, 4673 flow [2024-12-02 10:57:36,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 335 transitions, 4595 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-12-02 10:57:36,734 INFO L231 Difference]: Finished difference. Result has 170 places, 234 transitions, 3133 flow [2024-12-02 10:57:36,734 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2266, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3133, PETRI_PLACES=170, PETRI_TRANSITIONS=234} [2024-12-02 10:57:36,734 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 134 predicate places. [2024-12-02 10:57:36,734 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 234 transitions, 3133 flow [2024-12-02 10:57:36,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 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) [2024-12-02 10:57:36,734 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:36,734 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:36,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-12-02 10:57:36,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:36,935 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:36,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:36,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1618936556, now seen corresponding path program 3 times [2024-12-02 10:57:36,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:36,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59543588] [2024-12-02 10:57:36,936 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:57:36,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:36,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:36,937 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:36,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-12-02 10:57:36,992 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 10:57:36,992 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:36,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 10:57:36,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:37,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:57:37,041 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:57:37,041 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:37,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59543588] [2024-12-02 10:57:37,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59543588] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:57:37,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:57:37,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 10:57:37,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135503266] [2024-12-02 10:57:37,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:57:37,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 10:57:37,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:37,042 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 10:57:37,042 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:57:37,069 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:57:37,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 234 transitions, 3133 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:37,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:37,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:57:37,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:38,418 INFO L124 PetriNetUnfolderBase]: 3813/7663 cut-off events. [2024-12-02 10:57:38,418 INFO L125 PetriNetUnfolderBase]: For 84302/84718 co-relation queries the response was YES. [2024-12-02 10:57:38,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43883 conditions, 7663 events. 3813/7663 cut-off events. For 84302/84718 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 56864 event pairs, 1575 based on Foata normal form. 25/7553 useless extension candidates. Maximal degree in co-relation 43793. Up to 3908 conditions per place. [2024-12-02 10:57:38,483 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 254 selfloop transitions, 75 changer transitions 13/356 dead transitions. [2024-12-02 10:57:38,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 356 transitions, 5509 flow [2024-12-02 10:57:38,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 10:57:38,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 10:57:38,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-12-02 10:57:38,484 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-12-02 10:57:38,484 INFO L175 Difference]: Start difference. First operand has 170 places, 234 transitions, 3133 flow. Second operand 6 states and 122 transitions. [2024-12-02 10:57:38,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 356 transitions, 5509 flow [2024-12-02 10:57:38,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 356 transitions, 5441 flow, removed 34 selfloop flow, removed 0 redundant places. [2024-12-02 10:57:38,749 INFO L231 Difference]: Finished difference. Result has 178 places, 265 transitions, 3927 flow [2024-12-02 10:57:38,749 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3097, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3927, PETRI_PLACES=178, PETRI_TRANSITIONS=265} [2024-12-02 10:57:38,749 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 142 predicate places. [2024-12-02 10:57:38,750 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 265 transitions, 3927 flow [2024-12-02 10:57:38,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:38,750 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:38,750 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:38,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-12-02 10:57:38,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:38,950 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:38,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:38,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1825650244, now seen corresponding path program 2 times [2024-12-02 10:57:38,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:38,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766262395] [2024-12-02 10:57:38,951 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:57:38,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:38,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:38,953 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:38,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-12-02 10:57:39,020 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:57:39,020 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:39,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 10:57:39,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:57:39,077 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:57:39,077 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:39,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766262395] [2024-12-02 10:57:39,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766262395] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:57:39,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:57:39,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 10:57:39,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685483907] [2024-12-02 10:57:39,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:57:39,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 10:57:39,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:39,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 10:57:39,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:57:39,106 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:57:39,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 265 transitions, 3927 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:39,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:39,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:57:39,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:40,299 INFO L124 PetriNetUnfolderBase]: 3946/7847 cut-off events. [2024-12-02 10:57:40,299 INFO L125 PetriNetUnfolderBase]: For 89469/89928 co-relation queries the response was YES. [2024-12-02 10:57:40,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45634 conditions, 7847 events. 3946/7847 cut-off events. For 89469/89928 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 57886 event pairs, 1672 based on Foata normal form. 48/7743 useless extension candidates. Maximal degree in co-relation 45539. Up to 4071 conditions per place. [2024-12-02 10:57:40,353 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 222 selfloop transitions, 99 changer transitions 10/349 dead transitions. [2024-12-02 10:57:40,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 349 transitions, 5742 flow [2024-12-02 10:57:40,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 10:57:40,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 10:57:40,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-12-02 10:57:40,354 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-12-02 10:57:40,354 INFO L175 Difference]: Start difference. First operand has 178 places, 265 transitions, 3927 flow. Second operand 6 states and 122 transitions. [2024-12-02 10:57:40,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 349 transitions, 5742 flow [2024-12-02 10:57:40,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 349 transitions, 5545 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-12-02 10:57:40,574 INFO L231 Difference]: Finished difference. Result has 182 places, 291 transitions, 4556 flow [2024-12-02 10:57:40,574 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3771, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4556, PETRI_PLACES=182, PETRI_TRANSITIONS=291} [2024-12-02 10:57:40,574 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 146 predicate places. [2024-12-02 10:57:40,574 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 291 transitions, 4556 flow [2024-12-02 10:57:40,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:40,574 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:40,574 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:40,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-12-02 10:57:40,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:40,775 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:40,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:40,775 INFO L85 PathProgramCache]: Analyzing trace with hash -818352882, now seen corresponding path program 3 times [2024-12-02 10:57:40,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:40,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418928205] [2024-12-02 10:57:40,776 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:57:40,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:40,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:40,778 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:40,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-12-02 10:57:40,843 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 10:57:40,843 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:40,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 10:57:40,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:57:40,892 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:57:40,892 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:40,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418928205] [2024-12-02 10:57:40,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418928205] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:57:40,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:57:40,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 10:57:40,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715514757] [2024-12-02 10:57:40,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:57:40,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 10:57:40,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:40,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 10:57:40,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:57:40,916 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:57:40,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 291 transitions, 4556 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:40,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:40,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:57:40,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:42,060 INFO L124 PetriNetUnfolderBase]: 3833/7805 cut-off events. [2024-12-02 10:57:42,060 INFO L125 PetriNetUnfolderBase]: For 92990/93343 co-relation queries the response was YES. [2024-12-02 10:57:42,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45562 conditions, 7805 events. 3833/7805 cut-off events. For 92990/93343 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 58260 event pairs, 1464 based on Foata normal form. 30/7719 useless extension candidates. Maximal degree in co-relation 45466. Up to 3923 conditions per place. [2024-12-02 10:57:42,112 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 309 selfloop transitions, 58 changer transitions 9/394 dead transitions. [2024-12-02 10:57:42,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 394 transitions, 6627 flow [2024-12-02 10:57:42,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 10:57:42,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 10:57:42,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-12-02 10:57:42,113 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-12-02 10:57:42,113 INFO L175 Difference]: Start difference. First operand has 182 places, 291 transitions, 4556 flow. Second operand 6 states and 119 transitions. [2024-12-02 10:57:42,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 394 transitions, 6627 flow [2024-12-02 10:57:42,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 394 transitions, 6425 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-12-02 10:57:42,364 INFO L231 Difference]: Finished difference. Result has 186 places, 288 transitions, 4446 flow [2024-12-02 10:57:42,365 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4364, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4446, PETRI_PLACES=186, PETRI_TRANSITIONS=288} [2024-12-02 10:57:42,365 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 150 predicate places. [2024-12-02 10:57:42,365 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 288 transitions, 4446 flow [2024-12-02 10:57:42,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:42,365 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:42,365 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:42,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-12-02 10:57:42,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:42,566 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:42,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:42,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1876713546, now seen corresponding path program 4 times [2024-12-02 10:57:42,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:42,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597484781] [2024-12-02 10:57:42,566 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:57:42,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:42,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:42,568 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:42,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-12-02 10:57:42,617 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:57:42,617 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:42,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 10:57:42,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:57:42,644 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:57:42,645 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:42,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597484781] [2024-12-02 10:57:42,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597484781] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:57:42,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:57:42,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 10:57:42,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589505660] [2024-12-02 10:57:42,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:57:42,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 10:57:42,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:42,645 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 10:57:42,645 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 10:57:42,665 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:57:42,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 288 transitions, 4446 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 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) [2024-12-02 10:57:42,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:42,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:57:42,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:43,830 INFO L124 PetriNetUnfolderBase]: 3791/7698 cut-off events. [2024-12-02 10:57:43,830 INFO L125 PetriNetUnfolderBase]: For 94937/95127 co-relation queries the response was YES. [2024-12-02 10:57:43,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44925 conditions, 7698 events. 3791/7698 cut-off events. For 94937/95127 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 57263 event pairs, 1270 based on Foata normal form. 25/7609 useless extension candidates. Maximal degree in co-relation 44828. Up to 3716 conditions per place. [2024-12-02 10:57:43,880 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 227 selfloop transitions, 96 changer transitions 5/342 dead transitions. [2024-12-02 10:57:43,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 342 transitions, 5641 flow [2024-12-02 10:57:43,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 10:57:43,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-12-02 10:57:43,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-12-02 10:57:43,881 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6228571428571429 [2024-12-02 10:57:43,881 INFO L175 Difference]: Start difference. First operand has 186 places, 288 transitions, 4446 flow. Second operand 5 states and 109 transitions. [2024-12-02 10:57:43,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 342 transitions, 5641 flow [2024-12-02 10:57:44,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 342 transitions, 5505 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-12-02 10:57:44,113 INFO L231 Difference]: Finished difference. Result has 185 places, 286 transitions, 4482 flow [2024-12-02 10:57:44,113 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4316, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4482, PETRI_PLACES=185, PETRI_TRANSITIONS=286} [2024-12-02 10:57:44,113 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 149 predicate places. [2024-12-02 10:57:44,113 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 286 transitions, 4482 flow [2024-12-02 10:57:44,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 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) [2024-12-02 10:57:44,114 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:44,114 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:44,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-12-02 10:57:44,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:44,314 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:44,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:44,314 INFO L85 PathProgramCache]: Analyzing trace with hash -815396106, now seen corresponding path program 4 times [2024-12-02 10:57:44,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:44,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639586902] [2024-12-02 10:57:44,315 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:57:44,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:44,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:44,316 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:44,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-12-02 10:57:44,362 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:57:44,362 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:44,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 10:57:44,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:57:44,386 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:57:44,386 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:44,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639586902] [2024-12-02 10:57:44,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639586902] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:57:44,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:57:44,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 10:57:44,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141877568] [2024-12-02 10:57:44,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:57:44,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 10:57:44,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:44,387 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 10:57:44,387 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 10:57:44,408 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-12-02 10:57:44,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 286 transitions, 4482 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 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) [2024-12-02 10:57:44,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:44,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-12-02 10:57:44,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:45,925 INFO L124 PetriNetUnfolderBase]: 4850/9166 cut-off events. [2024-12-02 10:57:45,925 INFO L125 PetriNetUnfolderBase]: For 110058/110096 co-relation queries the response was YES. [2024-12-02 10:57:45,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54222 conditions, 9166 events. 4850/9166 cut-off events. For 110058/110096 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 65309 event pairs, 1601 based on Foata normal form. 32/9088 useless extension candidates. Maximal degree in co-relation 54127. Up to 4652 conditions per place. [2024-12-02 10:57:45,997 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 276 selfloop transitions, 94 changer transitions 3/382 dead transitions. [2024-12-02 10:57:45,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 382 transitions, 6250 flow [2024-12-02 10:57:45,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 10:57:45,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 10:57:45,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-12-02 10:57:45,998 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-12-02 10:57:45,999 INFO L175 Difference]: Start difference. First operand has 185 places, 286 transitions, 4482 flow. Second operand 6 states and 129 transitions. [2024-12-02 10:57:45,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 382 transitions, 6250 flow [2024-12-02 10:57:46,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 382 transitions, 6064 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-12-02 10:57:46,298 INFO L231 Difference]: Finished difference. Result has 187 places, 284 transitions, 4448 flow [2024-12-02 10:57:46,298 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4068, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4448, PETRI_PLACES=187, PETRI_TRANSITIONS=284} [2024-12-02 10:57:46,299 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 151 predicate places. [2024-12-02 10:57:46,299 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 284 transitions, 4448 flow [2024-12-02 10:57:46,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 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) [2024-12-02 10:57:46,299 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:46,299 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:46,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-12-02 10:57:46,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:46,499 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:46,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:46,500 INFO L85 PathProgramCache]: Analyzing trace with hash 194961274, now seen corresponding path program 5 times [2024-12-02 10:57:46,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:46,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167109645] [2024-12-02 10:57:46,500 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:57:46,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:46,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:46,501 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:46,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-12-02 10:57:46,560 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:57:46,560 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:46,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 10:57:46,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:57:46,611 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:57:46,611 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:46,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167109645] [2024-12-02 10:57:46,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167109645] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:57:46,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:57:46,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 10:57:46,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536846834] [2024-12-02 10:57:46,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:57:46,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 10:57:46,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:46,612 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 10:57:46,612 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:57:46,623 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-12-02 10:57:46,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 284 transitions, 4448 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2024-12-02 10:57:46,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:46,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-12-02 10:57:46,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:47,995 INFO L124 PetriNetUnfolderBase]: 4752/8915 cut-off events. [2024-12-02 10:57:47,996 INFO L125 PetriNetUnfolderBase]: For 111453/111515 co-relation queries the response was YES. [2024-12-02 10:57:48,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53580 conditions, 8915 events. 4752/8915 cut-off events. For 111453/111515 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 62893 event pairs, 1830 based on Foata normal form. 30/8836 useless extension candidates. Maximal degree in co-relation 53484. Up to 4622 conditions per place. [2024-12-02 10:57:48,048 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 296 selfloop transitions, 90 changer transitions 0/395 dead transitions. [2024-12-02 10:57:48,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 395 transitions, 6477 flow [2024-12-02 10:57:48,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 10:57:48,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 10:57:48,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-12-02 10:57:48,049 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5551020408163265 [2024-12-02 10:57:48,049 INFO L175 Difference]: Start difference. First operand has 187 places, 284 transitions, 4448 flow. Second operand 7 states and 136 transitions. [2024-12-02 10:57:48,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 395 transitions, 6477 flow [2024-12-02 10:57:48,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 395 transitions, 6236 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-12-02 10:57:48,313 INFO L231 Difference]: Finished difference. Result has 186 places, 279 transitions, 4328 flow [2024-12-02 10:57:48,313 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4066, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4328, PETRI_PLACES=186, PETRI_TRANSITIONS=279} [2024-12-02 10:57:48,313 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 150 predicate places. [2024-12-02 10:57:48,313 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 279 transitions, 4328 flow [2024-12-02 10:57:48,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 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) [2024-12-02 10:57:48,314 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:48,314 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:48,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-12-02 10:57:48,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:48,514 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:48,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:48,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1808528008, now seen corresponding path program 6 times [2024-12-02 10:57:48,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:48,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600095430] [2024-12-02 10:57:48,515 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:57:48,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:48,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:48,516 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:48,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-12-02 10:57:48,578 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-12-02 10:57:48,578 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:48,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 10:57:48,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:48,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 10:57:48,625 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:57:48,626 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:48,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600095430] [2024-12-02 10:57:48,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600095430] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:57:48,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:57:48,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 10:57:48,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697280680] [2024-12-02 10:57:48,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:57:48,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 10:57:48,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:48,626 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 10:57:48,626 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:57:48,653 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:57:48,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 279 transitions, 4328 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:48,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:48,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:57:48,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:49,818 INFO L124 PetriNetUnfolderBase]: 4079/7968 cut-off events. [2024-12-02 10:57:49,818 INFO L125 PetriNetUnfolderBase]: For 105610/106133 co-relation queries the response was YES. [2024-12-02 10:57:49,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48064 conditions, 7968 events. 4079/7968 cut-off events. For 105610/106133 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 57903 event pairs, 1540 based on Foata normal form. 26/7825 useless extension candidates. Maximal degree in co-relation 47968. Up to 3957 conditions per place. [2024-12-02 10:57:49,876 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 245 selfloop transitions, 77 changer transitions 4/349 dead transitions. [2024-12-02 10:57:49,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 349 transitions, 5748 flow [2024-12-02 10:57:49,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 10:57:49,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-12-02 10:57:49,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-12-02 10:57:49,877 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2024-12-02 10:57:49,877 INFO L175 Difference]: Start difference. First operand has 186 places, 279 transitions, 4328 flow. Second operand 6 states and 116 transitions. [2024-12-02 10:57:49,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 349 transitions, 5748 flow [2024-12-02 10:57:50,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 349 transitions, 5534 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-12-02 10:57:50,159 INFO L231 Difference]: Finished difference. Result has 187 places, 276 transitions, 4228 flow [2024-12-02 10:57:50,159 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4118, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4228, PETRI_PLACES=187, PETRI_TRANSITIONS=276} [2024-12-02 10:57:50,159 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 151 predicate places. [2024-12-02 10:57:50,159 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 276 transitions, 4228 flow [2024-12-02 10:57:50,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:57:50,159 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:50,159 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:50,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-12-02 10:57:50,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:50,360 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:50,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:50,360 INFO L85 PathProgramCache]: Analyzing trace with hash -954759040, now seen corresponding path program 4 times [2024-12-02 10:57:50,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:50,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121155534] [2024-12-02 10:57:50,360 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:57:50,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:50,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:50,362 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:50,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-12-02 10:57:50,438 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:57:50,438 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:50,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-12-02 10:57:50,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:50,446 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 7 [2024-12-02 10:57:50,904 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:50,904 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:57:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:57:52,126 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:57:52,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121155534] [2024-12-02 10:57:52,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121155534] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:57:52,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:57:52,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2024-12-02 10:57:52,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616557535] [2024-12-02 10:57:52,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:57:52,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-12-02 10:57:52,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:57:52,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-12-02 10:57:52,127 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-12-02 10:57:53,284 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-12-02 10:57:53,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 276 transitions, 4228 flow. Second operand has 21 states, 21 states have (on average 13.619047619047619) internal successors, (286), 21 states have internal predecessors, (286), 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) [2024-12-02 10:57:53,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:57:53,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-12-02 10:57:53,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:57:58,814 INFO L124 PetriNetUnfolderBase]: 5015/9925 cut-off events. [2024-12-02 10:57:58,814 INFO L125 PetriNetUnfolderBase]: For 128898/129835 co-relation queries the response was YES. [2024-12-02 10:57:58,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58288 conditions, 9925 events. 5015/9925 cut-off events. For 128898/129835 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 72821 event pairs, 974 based on Foata normal form. 255/9968 useless extension candidates. Maximal degree in co-relation 58191. Up to 2387 conditions per place. [2024-12-02 10:57:58,875 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 488 selfloop transitions, 139 changer transitions 0/655 dead transitions. [2024-12-02 10:57:58,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 655 transitions, 10507 flow [2024-12-02 10:57:58,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-12-02 10:57:58,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-12-02 10:57:58,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 493 transitions. [2024-12-02 10:57:58,877 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5417582417582417 [2024-12-02 10:57:58,877 INFO L175 Difference]: Start difference. First operand has 187 places, 276 transitions, 4228 flow. Second operand 26 states and 493 transitions. [2024-12-02 10:57:58,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 655 transitions, 10507 flow [2024-12-02 10:57:59,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 655 transitions, 10295 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-12-02 10:57:59,136 INFO L231 Difference]: Finished difference. Result has 213 places, 330 transitions, 5224 flow [2024-12-02 10:57:59,136 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4072, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5224, PETRI_PLACES=213, PETRI_TRANSITIONS=330} [2024-12-02 10:57:59,136 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 177 predicate places. [2024-12-02 10:57:59,137 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 330 transitions, 5224 flow [2024-12-02 10:57:59,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 13.619047619047619) internal successors, (286), 21 states have internal predecessors, (286), 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) [2024-12-02 10:57:59,137 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:57:59,137 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:57:59,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-12-02 10:57:59,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:59,337 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:57:59,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:57:59,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1262376801, now seen corresponding path program 5 times [2024-12-02 10:57:59,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:57:59,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1448293454] [2024-12-02 10:57:59,338 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:57:59,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:57:59,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:57:59,339 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:57:59,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-12-02 10:57:59,446 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-12-02 10:57:59,446 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:57:59,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-12-02 10:57:59,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:57:59,457 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 7 [2024-12-02 10:57:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-12-02 10:57:59,863 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:58:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-12-02 10:58:00,408 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:58:00,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448293454] [2024-12-02 10:58:00,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448293454] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:58:00,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:58:00,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2024-12-02 10:58:00,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596705262] [2024-12-02 10:58:00,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:58:00,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-12-02 10:58:00,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:58:00,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-12-02 10:58:00,408 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-12-02 10:58:01,037 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-12-02 10:58:01,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 330 transitions, 5224 flow. Second operand has 16 states, 16 states have (on average 13.75) internal successors, (220), 16 states have internal predecessors, (220), 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) [2024-12-02 10:58:01,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:58:01,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-12-02 10:58:01,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:58:04,838 INFO L124 PetriNetUnfolderBase]: 5402/10447 cut-off events. [2024-12-02 10:58:04,839 INFO L125 PetriNetUnfolderBase]: For 165509/166125 co-relation queries the response was YES. [2024-12-02 10:58:04,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65633 conditions, 10447 events. 5402/10447 cut-off events. For 165509/166125 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 76032 event pairs, 1285 based on Foata normal form. 126/10235 useless extension candidates. Maximal degree in co-relation 65527. Up to 2567 conditions per place. [2024-12-02 10:58:04,921 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 372 selfloop transitions, 112 changer transitions 0/512 dead transitions. [2024-12-02 10:58:04,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 512 transitions, 8647 flow [2024-12-02 10:58:04,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 10:58:04,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-12-02 10:58:04,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 323 transitions. [2024-12-02 10:58:04,923 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-12-02 10:58:04,923 INFO L175 Difference]: Start difference. First operand has 213 places, 330 transitions, 5224 flow. Second operand 17 states and 323 transitions. [2024-12-02 10:58:04,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 512 transitions, 8647 flow [2024-12-02 10:58:05,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 512 transitions, 8337 flow, removed 124 selfloop flow, removed 11 redundant places. [2024-12-02 10:58:05,315 INFO L231 Difference]: Finished difference. Result has 221 places, 337 transitions, 5531 flow [2024-12-02 10:58:05,315 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5076, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5531, PETRI_PLACES=221, PETRI_TRANSITIONS=337} [2024-12-02 10:58:05,316 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 185 predicate places. [2024-12-02 10:58:05,316 INFO L471 AbstractCegarLoop]: Abstraction has has 221 places, 337 transitions, 5531 flow [2024-12-02 10:58:05,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.75) internal successors, (220), 16 states have internal predecessors, (220), 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) [2024-12-02 10:58:05,316 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:58:05,316 INFO L206 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-12-02 10:58:05,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-12-02 10:58:05,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:58:05,517 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:58:05,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:58:05,517 INFO L85 PathProgramCache]: Analyzing trace with hash -873039541, now seen corresponding path program 3 times [2024-12-02 10:58:05,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:58:05,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382816782] [2024-12-02 10:58:05,517 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:58:05,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:58:05,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:58:05,519 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:58:05,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-12-02 10:58:05,911 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-12-02 10:58:05,911 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:58:05,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 10:58:05,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:58:05,921 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 7 [2024-12-02 10:58:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:58:06,377 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:58:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:58:08,453 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:58:08,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382816782] [2024-12-02 10:58:08,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382816782] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:58:08,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:58:08,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-12-02 10:58:08,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890425465] [2024-12-02 10:58:08,454 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:58:08,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-02 10:58:08,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:58:08,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-02 10:58:08,454 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2024-12-02 10:58:10,048 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:58:10,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 337 transitions, 5531 flow. Second operand has 26 states, 26 states have (on average 14.76923076923077) internal successors, (384), 26 states have internal predecessors, (384), 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) [2024-12-02 10:58:10,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:58:10,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:58:10,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:58:26,650 INFO L124 PetriNetUnfolderBase]: 5019/9750 cut-off events. [2024-12-02 10:58:26,650 INFO L125 PetriNetUnfolderBase]: For 163323/164433 co-relation queries the response was YES. [2024-12-02 10:58:26,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63494 conditions, 9750 events. 5019/9750 cut-off events. For 163323/164433 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 71737 event pairs, 2561 based on Foata normal form. 18/9431 useless extension candidates. Maximal degree in co-relation 63110. Up to 6632 conditions per place. [2024-12-02 10:58:26,829 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 277 selfloop transitions, 66 changer transitions 0/373 dead transitions. [2024-12-02 10:58:26,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 373 transitions, 6709 flow [2024-12-02 10:58:26,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-12-02 10:58:26,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-12-02 10:58:26,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 695 transitions. [2024-12-02 10:58:26,831 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43167701863354035 [2024-12-02 10:58:26,831 INFO L175 Difference]: Start difference. First operand has 221 places, 337 transitions, 5531 flow. Second operand 46 states and 695 transitions. [2024-12-02 10:58:26,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 373 transitions, 6709 flow [2024-12-02 10:58:27,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 373 transitions, 6606 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-12-02 10:58:27,179 INFO L231 Difference]: Finished difference. Result has 267 places, 373 transitions, 6106 flow [2024-12-02 10:58:27,179 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5440, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=6106, PETRI_PLACES=267, PETRI_TRANSITIONS=373} [2024-12-02 10:58:27,180 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 231 predicate places. [2024-12-02 10:58:27,180 INFO L471 AbstractCegarLoop]: Abstraction has has 267 places, 373 transitions, 6106 flow [2024-12-02 10:58:27,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.76923076923077) internal successors, (384), 26 states have internal predecessors, (384), 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) [2024-12-02 10:58:27,180 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:58:27,180 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2024-12-02 10:58:27,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-12-02 10:58:27,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:58:27,381 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:58:27,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:58:27,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1503424698, now seen corresponding path program 6 times [2024-12-02 10:58:27,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:58:27,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424385037] [2024-12-02 10:58:27,382 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:58:27,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:58:27,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:58:27,383 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:58:27,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-12-02 10:58:27,466 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-12-02 10:58:27,467 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:58:27,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-12-02 10:58:27,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:58:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:58:27,686 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:58:28,050 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 10:58:28,050 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 10:58:28,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424385037] [2024-12-02 10:58:28,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424385037] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:58:28,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:58:28,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2024-12-02 10:58:28,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851539569] [2024-12-02 10:58:28,051 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:58:28,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-12-02 10:58:28,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 10:58:28,051 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-12-02 10:58:28,051 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2024-12-02 10:58:28,405 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-12-02 10:58:28,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 373 transitions, 6106 flow. Second operand has 22 states, 22 states have (on average 14.818181818181818) internal successors, (326), 22 states have internal predecessors, (326), 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) [2024-12-02 10:58:28,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 10:58:28,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-12-02 10:58:28,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 10:58:31,533 INFO L124 PetriNetUnfolderBase]: 4571/8720 cut-off events. [2024-12-02 10:58:31,533 INFO L125 PetriNetUnfolderBase]: For 127881/128813 co-relation queries the response was YES. [2024-12-02 10:58:31,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54429 conditions, 8720 events. 4571/8720 cut-off events. For 127881/128813 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 62178 event pairs, 1690 based on Foata normal form. 146/8714 useless extension candidates. Maximal degree in co-relation 54277. Up to 3905 conditions per place. [2024-12-02 10:58:31,593 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 407 selfloop transitions, 86 changer transitions 0/516 dead transitions. [2024-12-02 10:58:31,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 516 transitions, 8692 flow [2024-12-02 10:58:31,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 10:58:31,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-12-02 10:58:31,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 366 transitions. [2024-12-02 10:58:31,594 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-12-02 10:58:31,594 INFO L175 Difference]: Start difference. First operand has 267 places, 373 transitions, 6106 flow. Second operand 18 states and 366 transitions. [2024-12-02 10:58:31,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 516 transitions, 8692 flow [2024-12-02 10:58:31,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 516 transitions, 8501 flow, removed 61 selfloop flow, removed 25 redundant places. [2024-12-02 10:58:31,874 INFO L231 Difference]: Finished difference. Result has 258 places, 359 transitions, 5868 flow [2024-12-02 10:58:31,874 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5664, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5868, PETRI_PLACES=258, PETRI_TRANSITIONS=359} [2024-12-02 10:58:31,874 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 222 predicate places. [2024-12-02 10:58:31,874 INFO L471 AbstractCegarLoop]: Abstraction has has 258 places, 359 transitions, 5868 flow [2024-12-02 10:58:31,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 14.818181818181818) internal successors, (326), 22 states have internal predecessors, (326), 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) [2024-12-02 10:58:31,874 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 10:58:31,874 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:58:31,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-12-02 10:58:32,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:58:32,075 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-12-02 10:58:32,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:58:32,075 INFO L85 PathProgramCache]: Analyzing trace with hash -799862621, now seen corresponding path program 1 times [2024-12-02 10:58:32,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 10:58:32,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925079441] [2024-12-02 10:58:32,076 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:58:32,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:58:32,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:58:32,077 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:58:32,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-12-02 10:58:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-12-02 10:58:32,141 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-12-02 10:58:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-12-02 10:58:32,199 INFO L130 FreeRefinementEngine]: Strategy FOX found a feasible trace [2024-12-02 10:58:32,199 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-12-02 10:58:32,200 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (13 of 14 remaining) [2024-12-02 10:58:32,202 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2024-12-02 10:58:32,202 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2024-12-02 10:58:32,202 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2024-12-02 10:58:32,203 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2024-12-02 10:58:32,203 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2024-12-02 10:58:32,203 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2024-12-02 10:58:32,203 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (6 of 14 remaining) [2024-12-02 10:58:32,203 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 14 remaining) [2024-12-02 10:58:32,203 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 14 remaining) [2024-12-02 10:58:32,203 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 14 remaining) [2024-12-02 10:58:32,203 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2024-12-02 10:58:32,203 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 14 remaining) [2024-12-02 10:58:32,203 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 14 remaining) [2024-12-02 10:58:32,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-12-02 10:58:32,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65269d99-d57e-48b4-9fd2-a61f839ba5e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:58:32,404 INFO L422 BasicCegarLoop]: Path program histogram: [6, 6, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:58:32,437 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-12-02 10:58:32,438 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-12-02 10:58:32,442 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 10:58:32 BasicIcfg [2024-12-02 10:58:32,442 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-12-02 10:58:32,443 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-12-02 10:58:32,443 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-12-02 10:58:32,443 INFO L274 PluginConnector]: Witness Printer initialized [2024-12-02 10:58:32,444 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:56:56" (3/4) ... [2024-12-02 10:58:32,445 INFO L149 WitnessPrinter]: No result that supports witness generation found [2024-12-02 10:58:32,446 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-12-02 10:58:32,447 INFO L158 Benchmark]: Toolchain (without parser) took 97173.36ms. Allocated memory was 92.3MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 70.2MB in the beginning and 729.8MB in the end (delta: -659.6MB). Peak memory consumption was 903.5MB. Max. memory is 16.1GB. [2024-12-02 10:58:32,447 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 83.9MB. Free memory is still 48.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 10:58:32,447 INFO L158 Benchmark]: CACSL2BoogieTranslator took 232.75ms. Allocated memory is still 92.3MB. Free memory was 70.0MB in the beginning and 57.6MB in the end (delta: 12.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-02 10:58:32,448 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.11ms. Allocated memory is still 92.3MB. Free memory was 57.6MB in the beginning and 55.9MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-02 10:58:32,448 INFO L158 Benchmark]: Boogie Preprocessor took 45.83ms. Allocated memory is still 92.3MB. Free memory was 55.9MB in the beginning and 53.7MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 10:58:32,448 INFO L158 Benchmark]: RCFGBuilder took 659.84ms. Allocated memory is still 92.3MB. Free memory was 53.7MB in the beginning and 66.1MB in the end (delta: -12.4MB). Peak memory consumption was 30.3MB. Max. memory is 16.1GB. [2024-12-02 10:58:32,448 INFO L158 Benchmark]: TraceAbstraction took 96188.14ms. Allocated memory was 92.3MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 65.6MB in the beginning and 734.0MB in the end (delta: -668.4MB). Peak memory consumption was 898.3MB. Max. memory is 16.1GB. [2024-12-02 10:58:32,448 INFO L158 Benchmark]: Witness Printer took 3.16ms. Allocated memory is still 1.7GB. Free memory was 734.0MB in the beginning and 729.8MB in the end (delta: 4.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 10:58:32,450 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 83.9MB. Free memory is still 48.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 232.75ms. Allocated memory is still 92.3MB. Free memory was 70.0MB in the beginning and 57.6MB in the end (delta: 12.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.11ms. Allocated memory is still 92.3MB. Free memory was 57.6MB in the beginning and 55.9MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.83ms. Allocated memory is still 92.3MB. Free memory was 55.9MB in the beginning and 53.7MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 659.84ms. Allocated memory is still 92.3MB. Free memory was 53.7MB in the beginning and 66.1MB in the end (delta: -12.4MB). Peak memory consumption was 30.3MB. Max. memory is 16.1GB. * TraceAbstraction took 96188.14ms. Allocated memory was 92.3MB in the beginning and 1.7GB in the end (delta: 1.6GB). Free memory was 65.6MB in the beginning and 734.0MB in the end (delta: -668.4MB). Peak memory consumption was 898.3MB. Max. memory is 16.1GB. * Witness Printer took 3.16ms. Allocated memory is still 1.7GB. Free memory was 734.0MB in the beginning and 729.8MB in the end (delta: 4.2MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 21. Possible FailurePath: [L39] 0 int* A; [L40] 0 _Atomic int counter; [L41] 0 int N; [L66] 0 pthread_t t1, t2; [L68] 0 N = __VERIFIER_nondet_int() [L69] CALL, EXPR 0 create_fresh_int_array(N) [L84] CALL 0 assume_abort_if_not(size >= 0) [L36] COND FALSE 0 !(!cond) [L84] RET 0 assume_abort_if_not(size >= 0) [L85] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L36] COND FALSE 0 !(!cond) [L85] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L87] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L88] 0 int i = 0; VAL [A={0:0}, N=1, \old(size)=1, arr={3:0}, counter=0, i=0, size=1] [L88] COND TRUE 0 i < size [L89] 0 arr[i] = __VERIFIER_nondet_int() [L88] 0 i++ VAL [A={0:0}, N=1, \old(size)=1, arr={3:0}, counter=0, i=1, size=1] [L88] COND FALSE 0 !(i < size) [L91] 0 return arr; [L69] RET, EXPR 0 create_fresh_int_array(N) [L69] 0 A = create_fresh_int_array(N) [L72] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={3:0}, N=1, counter=0, t1=0] [L73] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={3:0}, N=1, counter=0, t1=0, t2=1] [L48] 1 int i=0; VAL [A={3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=0, i=0] [L48] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L36] COND FALSE 1 !(!cond) [L101] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L102] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L36] COND FALSE 1 !(!cond) [L102] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L103] 1 return a + b; [L49] RET, EXPR 1 plus(counter, A[i]) [L49] 1 int tmp = plus(counter, A[i]); [L57] 2 int i=0; VAL [A={3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=0, i=0] [L57] COND TRUE 2 i= b - 2147483648) [L36] COND FALSE 2 !(!cond) [L95] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L96] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L36] COND FALSE 2 !(!cond) [L96] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L97] 2 return a - b; [L58] RET, EXPR 2 minus(counter, A[i]) [L58] 2 int tmp = minus(counter, A[i]); [L50] 1 counter = tmp VAL [A={3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=1, i=0, tmp=1] [L59] 2 counter = tmp VAL [A={3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=-1, i=0, tmp=-1] [L57] 2 i++ VAL [A={3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=-1, i=1] [L48] 1 i++ VAL [A={3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=-1, i=1] [L48] COND FALSE 1 !(i