./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.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_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/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_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/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_6b943f64-1b4e-4c52-b125-6b93e2d7f629/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 b1e99af7c76570461a4b0ac70d664412f250ec04f47fd9ca8c0f85236f1348c6 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 14:00:02,457 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 14:00:02,514 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 14:00:02,519 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 14:00:02,519 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 14:00:02,539 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 14:00:02,539 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 14:00:02,539 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 14:00:02,540 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 14:00:02,540 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 14:00:02,540 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 14:00:02,540 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 14:00:02,540 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 14:00:02,540 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 14:00:02,540 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 14:00:02,541 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 14:00:02,541 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 14:00:02,541 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 14:00:02,541 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 14:00:02,541 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 14:00:02,541 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 14:00:02,541 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 14:00:02,541 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 14:00:02,541 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 14:00:02,541 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 14:00:02,541 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 14:00:02,541 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 14:00:02,542 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 14:00:02,542 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 14:00:02,542 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 14:00:02,542 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 14:00:02,542 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 14:00:02,542 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 14:00:02,542 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 14:00:02,542 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 14:00:02,542 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 14:00:02,542 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 14:00:02,542 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 14:00:02,542 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 14:00:02,542 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 14:00:02,543 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 14:00:02,543 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 14:00:02,543 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 14:00:02,543 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 14:00:02,543 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 14:00:02,543 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 14:00:02,543 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 14:00:02,543 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_6b943f64-1b4e-4c52-b125-6b93e2d7f629/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 -> b1e99af7c76570461a4b0ac70d664412f250ec04f47fd9ca8c0f85236f1348c6 [2024-12-02 14:00:02,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 14:00:02,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 14:00:02,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 14:00:02,796 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 14:00:02,797 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 14:00:02,798 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2024-12-02 14:00:05,505 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/data/6ae07bfc6/92d6ded4d93c449aad4a7a2657676333/FLAG2e2d41e5e [2024-12-02 14:00:05,694 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 14:00:05,695 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2024-12-02 14:00:05,704 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/data/6ae07bfc6/92d6ded4d93c449aad4a7a2657676333/FLAG2e2d41e5e [2024-12-02 14:00:05,720 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/data/6ae07bfc6/92d6ded4d93c449aad4a7a2657676333 [2024-12-02 14:00:05,723 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 14:00:05,724 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 14:00:05,726 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 14:00:05,726 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 14:00:05,731 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 14:00:05,732 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:00:05" (1/1) ... [2024-12-02 14:00:05,733 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e8b0a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:00:05, skipping insertion in model container [2024-12-02 14:00:05,733 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:00:05" (1/1) ... [2024-12-02 14:00:05,752 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 14:00:05,945 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 14:00:05,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 14:00:05,958 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 14:00:05,985 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 14:00:06,001 INFO L204 MainTranslator]: Completed translation [2024-12-02 14:00:06,001 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:00:06 WrapperNode [2024-12-02 14:00:06,002 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 14:00:06,002 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 14:00:06,003 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 14:00:06,003 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 14:00:06,009 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:00:06" (1/1) ... [2024-12-02 14:00:06,018 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:00:06" (1/1) ... [2024-12-02 14:00:06,047 INFO L138 Inliner]: procedures = 26, calls = 49, calls flagged for inlining = 19, calls inlined = 25, statements flattened = 292 [2024-12-02 14:00:06,047 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 14:00:06,048 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 14:00:06,048 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 14:00:06,048 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 14:00:06,058 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:00:06" (1/1) ... [2024-12-02 14:00:06,058 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:00:06" (1/1) ... [2024-12-02 14:00:06,061 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:00:06" (1/1) ... [2024-12-02 14:00:06,079 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 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 14:00:06,080 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:00:06" (1/1) ... [2024-12-02 14:00:06,080 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:00:06" (1/1) ... [2024-12-02 14:00:06,089 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:00:06" (1/1) ... [2024-12-02 14:00:06,090 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:00:06" (1/1) ... [2024-12-02 14:00:06,095 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:00:06" (1/1) ... [2024-12-02 14:00:06,097 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:00:06" (1/1) ... [2024-12-02 14:00:06,098 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:00:06" (1/1) ... [2024-12-02 14:00:06,101 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 14:00:06,102 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 14:00:06,102 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 14:00:06,102 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 14:00:06,103 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:00:06" (1/1) ... [2024-12-02 14:00:06,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 14:00:06,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:00:06,135 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 14:00:06,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 14:00:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 14:00:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 14:00:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 14:00:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 14:00:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 14:00:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-12-02 14:00:06,166 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-12-02 14:00:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-12-02 14:00:06,166 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-12-02 14:00:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-12-02 14:00:06,167 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-12-02 14:00:06,167 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-12-02 14:00:06,167 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-12-02 14:00:06,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 14:00:06,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 14:00:06,167 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-12-02 14:00:06,167 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-12-02 14:00:06,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 14:00:06,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 14:00:06,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 14:00:06,169 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 14:00:06,270 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 14:00:06,271 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 14:00:06,674 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-12-02 14:00:06,674 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 14:00:06,956 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 14:00:06,956 INFO L312 CfgBuilder]: Removed 5 assume(true) statements. [2024-12-02 14:00:06,956 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:00:06 BoogieIcfgContainer [2024-12-02 14:00:06,956 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 14:00:06,958 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 14:00:06,958 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 14:00:06,962 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 14:00:06,962 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:00:05" (1/3) ... [2024-12-02 14:00:06,963 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52bddc98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:00:06, skipping insertion in model container [2024-12-02 14:00:06,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:00:06" (2/3) ... [2024-12-02 14:00:06,963 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52bddc98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:00:06, skipping insertion in model container [2024-12-02 14:00:06,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:00:06" (3/3) ... [2024-12-02 14:00:06,964 INFO L128 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2024-12-02 14:00:06,977 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 14:00:06,978 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG parallel-parallel-sum-1.wvr.c that has 5 procedures, 59 locations, 1 initial locations, 5 loop locations, and 12 error locations. [2024-12-02 14:00:06,978 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-12-02 14:00:07,075 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-12-02 14:00:07,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 67 transitions, 162 flow [2024-12-02 14:00:07,132 INFO L124 PetriNetUnfolderBase]: 9/63 cut-off events. [2024-12-02 14:00:07,134 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-12-02 14:00:07,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 63 events. 9/63 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 142 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2024-12-02 14:00:07,137 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 67 transitions, 162 flow [2024-12-02 14:00:07,140 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 62 transitions, 148 flow [2024-12-02 14:00:07,146 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 14:00:07,157 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;@22326d0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 14:00:07,157 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-12-02 14:00:07,160 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-12-02 14:00:07,160 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-12-02 14:00:07,160 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-12-02 14:00:07,160 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 14:00:07,161 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 14:00:07,161 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 14:00:07,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:00:07,166 INFO L85 PathProgramCache]: Analyzing trace with hash 878930, now seen corresponding path program 1 times [2024-12-02 14:00:07,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:00:07,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697523626] [2024-12-02 14:00:07,172 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:00:07,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:00:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:00:07,379 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 14:00:07,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:00:07,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697523626] [2024-12-02 14:00:07,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697523626] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:00:07,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:00:07,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-12-02 14:00:07,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117459120] [2024-12-02 14:00:07,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:00:07,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 14:00:07,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:00:07,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 14:00:07,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 14:00:07,418 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 67 [2024-12-02 14:00:07,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 14:00:07,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 14:00:07,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 67 [2024-12-02 14:00:07,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 14:00:11,913 INFO L124 PetriNetUnfolderBase]: 52585/68171 cut-off events. [2024-12-02 14:00:11,913 INFO L125 PetriNetUnfolderBase]: For 2931/2931 co-relation queries the response was YES. [2024-12-02 14:00:12,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138723 conditions, 68171 events. 52585/68171 cut-off events. For 2931/2931 co-relation queries the response was YES. Maximal size of possible extension queue 2681. Compared 380011 event pairs, 45974 based on Foata normal form. 1/48215 useless extension candidates. Maximal degree in co-relation 131525. Up to 68084 conditions per place. [2024-12-02 14:00:12,320 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 47 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2024-12-02 14:00:12,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 55 transitions, 232 flow [2024-12-02 14:00:12,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 14:00:12,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 14:00:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 88 transitions. [2024-12-02 14:00:12,333 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43781094527363185 [2024-12-02 14:00:12,334 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 148 flow. Second operand 3 states and 88 transitions. [2024-12-02 14:00:12,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 55 transitions, 232 flow [2024-12-02 14:00:12,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 55 transitions, 216 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-12-02 14:00:12,540 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 122 flow [2024-12-02 14:00:12,541 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-12-02 14:00:12,544 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -9 predicate places. [2024-12-02 14:00:12,544 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 122 flow [2024-12-02 14:00:12,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 14:00:12,544 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 14:00:12,545 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-12-02 14:00:12,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 14:00:12,545 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 14:00:12,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:00:12,546 INFO L85 PathProgramCache]: Analyzing trace with hash 878931, now seen corresponding path program 1 times [2024-12-02 14:00:12,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:00:12,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88495698] [2024-12-02 14:00:12,546 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:00:12,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:00:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:00:12,816 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 14:00:12,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:00:12,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88495698] [2024-12-02 14:00:12,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88495698] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:00:12,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:00:12,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 14:00:12,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114010916] [2024-12-02 14:00:12,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:00:12,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 14:00:12,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:00:12,818 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 14:00:12,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 14:00:12,828 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 67 [2024-12-02 14:00:12,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 14:00:12,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 14:00:12,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 67 [2024-12-02 14:00:12,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 14:00:16,373 INFO L124 PetriNetUnfolderBase]: 52585/68170 cut-off events. [2024-12-02 14:00:16,373 INFO L125 PetriNetUnfolderBase]: For 665/665 co-relation queries the response was YES. [2024-12-02 14:00:16,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137081 conditions, 68170 events. 52585/68170 cut-off events. For 665/665 co-relation queries the response was YES. Maximal size of possible extension queue 2681. Compared 379810 event pairs, 45974 based on Foata normal form. 0/48214 useless extension candidates. Maximal degree in co-relation 137068. Up to 68084 conditions per place. [2024-12-02 14:00:16,584 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 45 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2024-12-02 14:00:16,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 54 transitions, 218 flow [2024-12-02 14:00:16,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 14:00:16,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 14:00:16,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-12-02 14:00:16,586 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35074626865671643 [2024-12-02 14:00:16,586 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 122 flow. Second operand 4 states and 94 transitions. [2024-12-02 14:00:16,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 54 transitions, 218 flow [2024-12-02 14:00:16,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 14:00:16,587 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 124 flow [2024-12-02 14:00:16,587 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-12-02 14:00:16,588 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -9 predicate places. [2024-12-02 14:00:16,588 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 124 flow [2024-12-02 14:00:16,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 14:00:16,588 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 14:00:16,588 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:00:16,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 14:00:16,588 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 14:00:16,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:00:16,589 INFO L85 PathProgramCache]: Analyzing trace with hash 63790951, now seen corresponding path program 1 times [2024-12-02 14:00:16,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:00:16,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980119603] [2024-12-02 14:00:16,589 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:00:16,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:00:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:00:16,695 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 14:00:16,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:00:16,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980119603] [2024-12-02 14:00:16,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980119603] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:00:16,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:00:16,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 14:00:16,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792969223] [2024-12-02 14:00:16,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:00:16,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 14:00:16,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:00:16,696 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 14:00:16,696 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 14:00:16,706 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 67 [2024-12-02 14:00:16,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 14:00:16,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 14:00:16,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 67 [2024-12-02 14:00:16,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 14:00:18,486 INFO L124 PetriNetUnfolderBase]: 33332/43282 cut-off events. [2024-12-02 14:00:18,487 INFO L125 PetriNetUnfolderBase]: For 456/456 co-relation queries the response was YES. [2024-12-02 14:00:18,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87080 conditions, 43282 events. 33332/43282 cut-off events. For 456/456 co-relation queries the response was YES. Maximal size of possible extension queue 1664. Compared 229616 event pairs, 28616 based on Foata normal form. 0/33739 useless extension candidates. Maximal degree in co-relation 87065. Up to 43203 conditions per place. [2024-12-02 14:00:18,637 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 43 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2024-12-02 14:00:18,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 206 flow [2024-12-02 14:00:18,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 14:00:18,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 14:00:18,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-12-02 14:00:18,638 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34701492537313433 [2024-12-02 14:00:18,638 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 124 flow. Second operand 4 states and 93 transitions. [2024-12-02 14:00:18,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 206 flow [2024-12-02 14:00:18,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 198 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-12-02 14:00:18,641 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 112 flow [2024-12-02 14:00:18,641 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-12-02 14:00:18,642 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -13 predicate places. [2024-12-02 14:00:18,642 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 112 flow [2024-12-02 14:00:18,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 14:00:18,642 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 14:00:18,642 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:00:18,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 14:00:18,643 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 14:00:18,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:00:18,643 INFO L85 PathProgramCache]: Analyzing trace with hash 63790952, now seen corresponding path program 1 times [2024-12-02 14:00:18,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:00:18,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433153785] [2024-12-02 14:00:18,644 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:00:18,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:00:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:00:18,764 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 14:00:18,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:00:18,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433153785] [2024-12-02 14:00:18,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433153785] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:00:18,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:00:18,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 14:00:18,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014410582] [2024-12-02 14:00:18,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:00:18,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 14:00:18,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:00:18,766 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 14:00:18,766 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 14:00:18,769 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 67 [2024-12-02 14:00:18,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:00:18,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 14:00:18,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 67 [2024-12-02 14:00:18,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 14:00:21,648 INFO L124 PetriNetUnfolderBase]: 45012/59021 cut-off events. [2024-12-02 14:00:21,648 INFO L125 PetriNetUnfolderBase]: For 728/728 co-relation queries the response was YES. [2024-12-02 14:00:21,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118683 conditions, 59021 events. 45012/59021 cut-off events. For 728/728 co-relation queries the response was YES. Maximal size of possible extension queue 2092. Compared 331530 event pairs, 39355 based on Foata normal form. 1507/47739 useless extension candidates. Maximal degree in co-relation 86609. Up to 42952 conditions per place. [2024-12-02 14:00:22,008 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 78 selfloop transitions, 3 changer transitions 1/87 dead transitions. [2024-12-02 14:00:22,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 87 transitions, 360 flow [2024-12-02 14:00:22,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 14:00:22,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 14:00:22,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-12-02 14:00:22,010 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.503731343283582 [2024-12-02 14:00:22,010 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 112 flow. Second operand 4 states and 135 transitions. [2024-12-02 14:00:22,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 87 transitions, 360 flow [2024-12-02 14:00:22,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 87 transitions, 356 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 14:00:22,013 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 138 flow [2024-12-02 14:00:22,013 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-12-02 14:00:22,014 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -10 predicate places. [2024-12-02 14:00:22,014 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 138 flow [2024-12-02 14:00:22,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 14:00:22,014 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 14:00:22,014 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:00:22,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 14:00:22,014 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 14:00:22,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:00:22,015 INFO L85 PathProgramCache]: Analyzing trace with hash -267869689, now seen corresponding path program 1 times [2024-12-02 14:00:22,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:00:22,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192519556] [2024-12-02 14:00:22,015 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:00:22,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:00:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:00:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:00:22,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:00:22,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192519556] [2024-12-02 14:00:22,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192519556] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:00:22,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737288563] [2024-12-02 14:00:22,124 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:00:22,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:00:22,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:00:22,126 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:00:22,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 14:00:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:00:22,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 14:00:22,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:00:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:00:22,306 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:00:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:00:22,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737288563] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:00:22,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:00:22,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2024-12-02 14:00:22,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508741495] [2024-12-02 14:00:22,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:00:22,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 14:00:22,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:00:22,369 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 14:00:22,369 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-12-02 14:00:22,386 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 67 [2024-12-02 14:00:22,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 138 flow. Second operand has 10 states, 10 states have (on average 14.0) internal successors, (140), 10 states have internal predecessors, (140), 0 states have call successors, (0), 0 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 14:00:22,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 14:00:22,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 67 [2024-12-02 14:00:22,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 14:00:25,910 INFO L124 PetriNetUnfolderBase]: 56893/74963 cut-off events. [2024-12-02 14:00:25,911 INFO L125 PetriNetUnfolderBase]: For 4800/4800 co-relation queries the response was YES. [2024-12-02 14:00:26,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155499 conditions, 74963 events. 56893/74963 cut-off events. For 4800/4800 co-relation queries the response was YES. Maximal size of possible extension queue 2360. Compared 435804 event pairs, 50289 based on Foata normal form. 1506/60209 useless extension candidates. Maximal degree in co-relation 123426. Up to 42950 conditions per place. [2024-12-02 14:00:26,218 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 78 selfloop transitions, 8 changer transitions 0/91 dead transitions. [2024-12-02 14:00:26,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 91 transitions, 403 flow [2024-12-02 14:00:26,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 14:00:26,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 14:00:26,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-12-02 14:00:26,220 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37100213219616207 [2024-12-02 14:00:26,220 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 138 flow. Second operand 7 states and 174 transitions. [2024-12-02 14:00:26,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 91 transitions, 403 flow [2024-12-02 14:00:26,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 91 transitions, 401 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 14:00:26,229 INFO L231 Difference]: Finished difference. Result has 64 places, 56 transitions, 191 flow [2024-12-02 14:00:26,230 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=191, PETRI_PLACES=64, PETRI_TRANSITIONS=56} [2024-12-02 14:00:26,230 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2024-12-02 14:00:26,230 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 56 transitions, 191 flow [2024-12-02 14:00:26,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.0) internal successors, (140), 10 states have internal predecessors, (140), 0 states have call successors, (0), 0 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 14:00:26,231 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 14:00:26,231 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:00:26,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 14:00:26,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:00:26,432 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 14:00:26,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:00:26,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1654561460, now seen corresponding path program 1 times [2024-12-02 14:00:26,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:00:26,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525212186] [2024-12-02 14:00:26,432 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:00:26,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:00:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:00:26,516 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 14:00:26,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:00:26,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525212186] [2024-12-02 14:00:26,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525212186] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:00:26,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:00:26,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 14:00:26,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494866559] [2024-12-02 14:00:26,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:00:26,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 14:00:26,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:00:26,517 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 14:00:26,517 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 14:00:26,522 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 67 [2024-12-02 14:00:26,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 56 transitions, 191 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 14:00:26,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 14:00:26,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 67 [2024-12-02 14:00:26,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 14:00:29,653 INFO L124 PetriNetUnfolderBase]: 49569/65350 cut-off events. [2024-12-02 14:00:29,653 INFO L125 PetriNetUnfolderBase]: For 7732/7732 co-relation queries the response was YES. [2024-12-02 14:00:29,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141014 conditions, 65350 events. 49569/65350 cut-off events. For 7732/7732 co-relation queries the response was YES. Maximal size of possible extension queue 2282. Compared 377042 event pairs, 43898 based on Foata normal form. 611/51887 useless extension candidates. Maximal degree in co-relation 96536. Up to 59025 conditions per place. [2024-12-02 14:00:29,866 INFO L140 encePairwiseOnDemand]: 60/67 looper letters, 49 selfloop transitions, 2 changer transitions 29/85 dead transitions. [2024-12-02 14:00:29,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 85 transitions, 419 flow [2024-12-02 14:00:29,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 14:00:29,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 14:00:29,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-12-02 14:00:29,867 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47761194029850745 [2024-12-02 14:00:29,867 INFO L175 Difference]: Start difference. First operand has 64 places, 56 transitions, 191 flow. Second operand 4 states and 128 transitions. [2024-12-02 14:00:29,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 85 transitions, 419 flow [2024-12-02 14:00:29,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 85 transitions, 410 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-12-02 14:00:29,875 INFO L231 Difference]: Finished difference. Result has 67 places, 55 transitions, 185 flow [2024-12-02 14:00:29,875 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=185, PETRI_PLACES=67, PETRI_TRANSITIONS=55} [2024-12-02 14:00:29,876 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 1 predicate places. [2024-12-02 14:00:29,876 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 55 transitions, 185 flow [2024-12-02 14:00:29,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 14:00:29,876 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 14:00:29,877 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:00:29,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-02 14:00:29,877 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 14:00:29,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:00:29,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1166165786, now seen corresponding path program 2 times [2024-12-02 14:00:29,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:00:29,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668549904] [2024-12-02 14:00:29,877 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:00:29,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:00:29,900 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 14:00:29,900 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:00:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 14:00:30,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:00:30,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668549904] [2024-12-02 14:00:30,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668549904] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:00:30,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:00:30,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 14:00:30,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693230587] [2024-12-02 14:00:30,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:00:30,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 14:00:30,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:00:30,085 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 14:00:30,085 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 14:00:30,091 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 67 [2024-12-02 14:00:30,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 55 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:00:30,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 14:00:30,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 67 [2024-12-02 14:00:30,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 14:00:32,961 INFO L124 PetriNetUnfolderBase]: 37613/49370 cut-off events. [2024-12-02 14:00:32,961 INFO L125 PetriNetUnfolderBase]: For 7811/7811 co-relation queries the response was YES. [2024-12-02 14:00:33,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109001 conditions, 49370 events. 37613/49370 cut-off events. For 7811/7811 co-relation queries the response was YES. Maximal size of possible extension queue 1891. Compared 275037 event pairs, 32760 based on Foata normal form. 0/40129 useless extension candidates. Maximal degree in co-relation 108979. Up to 49251 conditions per place. [2024-12-02 14:00:33,139 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 45 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2024-12-02 14:00:33,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 53 transitions, 269 flow [2024-12-02 14:00:33,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 14:00:33,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 14:00:33,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-12-02 14:00:33,140 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34701492537313433 [2024-12-02 14:00:33,140 INFO L175 Difference]: Start difference. First operand has 67 places, 55 transitions, 185 flow. Second operand 4 states and 93 transitions. [2024-12-02 14:00:33,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 53 transitions, 269 flow [2024-12-02 14:00:33,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 53 transitions, 261 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-12-02 14:00:33,153 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 171 flow [2024-12-02 14:00:33,153 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=171, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2024-12-02 14:00:33,154 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2024-12-02 14:00:33,154 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 171 flow [2024-12-02 14:00:33,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 14:00:33,154 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 14:00:33,154 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:00:33,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-12-02 14:00:33,154 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 14:00:33,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:00:33,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1628684181, now seen corresponding path program 1 times [2024-12-02 14:00:33,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:00:33,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118161844] [2024-12-02 14:00:33,155 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:00:33,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:00:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:00:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:00:33,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:00:33,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118161844] [2024-12-02 14:00:33,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118161844] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:00:33,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599448213] [2024-12-02 14:00:33,240 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:00:33,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:00:33,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:00:33,242 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:00:33,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 14:00:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:00:33,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 14:00:33,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:00:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:00:33,399 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:00:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 14:00:33,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599448213] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 14:00:33,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 14:00:33,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2024-12-02 14:00:33,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665557955] [2024-12-02 14:00:33,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 14:00:33,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 14:00:33,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:00:33,452 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 14:00:33,452 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-12-02 14:00:33,461 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 67 [2024-12-02 14:00:33,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 171 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 14:00:33,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 14:00:33,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 67 [2024-12-02 14:00:33,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 14:00:35,498 INFO L124 PetriNetUnfolderBase]: 29978/39446 cut-off events. [2024-12-02 14:00:35,498 INFO L125 PetriNetUnfolderBase]: For 7524/7524 co-relation queries the response was YES. [2024-12-02 14:00:35,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87131 conditions, 39446 events. 29978/39446 cut-off events. For 7524/7524 co-relation queries the response was YES. Maximal size of possible extension queue 1423. Compared 213810 event pairs, 26084 based on Foata normal form. 611/33081 useless extension candidates. Maximal degree in co-relation 74626. Up to 33163 conditions per place. [2024-12-02 14:00:35,641 INFO L140 encePairwiseOnDemand]: 58/67 looper letters, 66 selfloop transitions, 7 changer transitions 4/82 dead transitions. [2024-12-02 14:00:35,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 393 flow [2024-12-02 14:00:35,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 14:00:35,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 14:00:35,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-12-02 14:00:35,643 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35181236673773986 [2024-12-02 14:00:35,643 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 171 flow. Second operand 7 states and 165 transitions. [2024-12-02 14:00:35,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 393 flow [2024-12-02 14:00:35,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 82 transitions, 385 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-12-02 14:00:35,653 INFO L231 Difference]: Finished difference. Result has 68 places, 53 transitions, 186 flow [2024-12-02 14:00:35,653 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=68, PETRI_TRANSITIONS=53} [2024-12-02 14:00:35,654 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 2 predicate places. [2024-12-02 14:00:35,654 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 53 transitions, 186 flow [2024-12-02 14:00:35,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 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 14:00:35,654 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 14:00:35,654 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:00:35,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 14:00:35,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:00:35,855 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 14:00:35,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:00:35,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1764544458, now seen corresponding path program 2 times [2024-12-02 14:00:35,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:00:35,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321240102] [2024-12-02 14:00:35,855 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:00:35,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:00:35,869 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 14:00:35,869 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:00:36,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-12-02 14:00:36,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:00:36,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321240102] [2024-12-02 14:00:36,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321240102] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:00:36,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:00:36,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 14:00:36,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470146199] [2024-12-02 14:00:36,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:00:36,035 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 14:00:36,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:00:36,035 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 14:00:36,035 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 14:00:36,042 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 67 [2024-12-02 14:00:36,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 53 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 14:00:36,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 14:00:36,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 67 [2024-12-02 14:00:36,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 14:00:37,891 INFO L124 PetriNetUnfolderBase]: 24355/32134 cut-off events. [2024-12-02 14:00:37,891 INFO L125 PetriNetUnfolderBase]: For 4859/4859 co-relation queries the response was YES. [2024-12-02 14:00:37,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69541 conditions, 32134 events. 24355/32134 cut-off events. For 4859/4859 co-relation queries the response was YES. Maximal size of possible extension queue 1153. Compared 171169 event pairs, 21124 based on Foata normal form. 0/27481 useless extension candidates. Maximal degree in co-relation 57030. Up to 32015 conditions per place. [2024-12-02 14:00:38,049 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 43 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2024-12-02 14:00:38,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 51 transitions, 266 flow [2024-12-02 14:00:38,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 14:00:38,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 14:00:38,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-12-02 14:00:38,051 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33955223880597013 [2024-12-02 14:00:38,051 INFO L175 Difference]: Start difference. First operand has 68 places, 53 transitions, 186 flow. Second operand 4 states and 91 transitions. [2024-12-02 14:00:38,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 51 transitions, 266 flow [2024-12-02 14:00:38,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 51 transitions, 250 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-12-02 14:00:38,064 INFO L231 Difference]: Finished difference. Result has 64 places, 51 transitions, 164 flow [2024-12-02 14:00:38,064 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=64, PETRI_TRANSITIONS=51} [2024-12-02 14:00:38,065 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2024-12-02 14:00:38,065 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 51 transitions, 164 flow [2024-12-02 14:00:38,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 14:00:38,065 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 14:00:38,065 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:00:38,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-12-02 14:00:38,065 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 14:00:38,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:00:38,066 INFO L85 PathProgramCache]: Analyzing trace with hash -393333264, now seen corresponding path program 1 times [2024-12-02 14:00:38,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:00:38,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510819005] [2024-12-02 14:00:38,066 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:00:38,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:00:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:00:38,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 14:00:38,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:00:38,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510819005] [2024-12-02 14:00:38,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510819005] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:00:38,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:00:38,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 14:00:38,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451257307] [2024-12-02 14:00:38,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:00:38,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 14:00:38,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:00:38,161 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 14:00:38,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 14:00:38,161 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 67 [2024-12-02 14:00:38,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 51 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 14:00:38,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 14:00:38,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 67 [2024-12-02 14:00:38,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 14:00:40,422 INFO L124 PetriNetUnfolderBase]: 35850/47045 cut-off events. [2024-12-02 14:00:40,422 INFO L125 PetriNetUnfolderBase]: For 4604/4604 co-relation queries the response was YES. [2024-12-02 14:00:40,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100145 conditions, 47045 events. 35850/47045 cut-off events. For 4604/4604 co-relation queries the response was YES. Maximal size of possible extension queue 1587. Compared 262624 event pairs, 13623 based on Foata normal form. 2/40260 useless extension candidates. Maximal degree in co-relation 87642. Up to 28282 conditions per place. [2024-12-02 14:00:40,588 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 73 selfloop transitions, 5 changer transitions 2/85 dead transitions. [2024-12-02 14:00:40,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 85 transitions, 405 flow [2024-12-02 14:00:40,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 14:00:40,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-12-02 14:00:40,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2024-12-02 14:00:40,589 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5621890547263682 [2024-12-02 14:00:40,589 INFO L175 Difference]: Start difference. First operand has 64 places, 51 transitions, 164 flow. Second operand 3 states and 113 transitions. [2024-12-02 14:00:40,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 85 transitions, 405 flow [2024-12-02 14:00:40,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 85 transitions, 401 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-12-02 14:00:40,593 INFO L231 Difference]: Finished difference. Result has 65 places, 53 transitions, 178 flow [2024-12-02 14:00:40,593 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=65, PETRI_TRANSITIONS=53} [2024-12-02 14:00:40,594 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2024-12-02 14:00:40,594 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 53 transitions, 178 flow [2024-12-02 14:00:40,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 14:00:40,594 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 14:00:40,594 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:00:40,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-12-02 14:00:40,594 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 14:00:40,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:00:40,595 INFO L85 PathProgramCache]: Analyzing trace with hash 2025627946, now seen corresponding path program 1 times [2024-12-02 14:00:40,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:00:40,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807842994] [2024-12-02 14:00:40,595 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:00:40,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:00:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:00:40,688 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 14:00:40,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:00:40,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807842994] [2024-12-02 14:00:40,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807842994] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:00:40,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:00:40,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 14:00:40,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647855174] [2024-12-02 14:00:40,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:00:40,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 14:00:40,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:00:40,689 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 14:00:40,689 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 14:00:40,689 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 67 [2024-12-02 14:00:40,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 53 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 14:00:40,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 14:00:40,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 67 [2024-12-02 14:00:40,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 14:00:45,730 INFO L124 PetriNetUnfolderBase]: 70326/91173 cut-off events. [2024-12-02 14:00:45,731 INFO L125 PetriNetUnfolderBase]: For 14973/14973 co-relation queries the response was YES. [2024-12-02 14:00:45,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210050 conditions, 91173 events. 70326/91173 cut-off events. For 14973/14973 co-relation queries the response was YES. Maximal size of possible extension queue 3002. Compared 532490 event pairs, 19731 based on Foata normal form. 1/79436 useless extension candidates. Maximal degree in co-relation 210008. Up to 31392 conditions per place. [2024-12-02 14:00:46,098 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 114 selfloop transitions, 8 changer transitions 1/128 dead transitions. [2024-12-02 14:00:46,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 128 transitions, 648 flow [2024-12-02 14:00:46,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 14:00:46,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 14:00:46,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 157 transitions. [2024-12-02 14:00:46,099 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.585820895522388 [2024-12-02 14:00:46,099 INFO L175 Difference]: Start difference. First operand has 65 places, 53 transitions, 178 flow. Second operand 4 states and 157 transitions. [2024-12-02 14:00:46,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 128 transitions, 648 flow [2024-12-02 14:00:46,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 128 transitions, 635 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-12-02 14:00:46,109 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 249 flow [2024-12-02 14:00:46,109 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=249, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2024-12-02 14:00:46,110 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 2 predicate places. [2024-12-02 14:00:46,110 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 249 flow [2024-12-02 14:00:46,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 14:00:46,110 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 14:00:46,110 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:00:46,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-12-02 14:00:46,110 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 14:00:46,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:00:46,111 INFO L85 PathProgramCache]: Analyzing trace with hash -2039260682, now seen corresponding path program 1 times [2024-12-02 14:00:46,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:00:46,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884437879] [2024-12-02 14:00:46,111 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:00:46,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:00:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:00:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 14:00:46,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:00:46,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884437879] [2024-12-02 14:00:46,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884437879] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:00:46,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:00:46,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 14:00:46,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512919213] [2024-12-02 14:00:46,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:00:46,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 14:00:46,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:00:46,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 14:00:46,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 14:00:46,220 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 67 [2024-12-02 14:00:46,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 249 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 14:00:46,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 14:00:46,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 67 [2024-12-02 14:00:46,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 14:00:54,150 INFO L124 PetriNetUnfolderBase]: 108414/140457 cut-off events. [2024-12-02 14:00:54,150 INFO L125 PetriNetUnfolderBase]: For 64755/64755 co-relation queries the response was YES. [2024-12-02 14:00:54,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343256 conditions, 140457 events. 108414/140457 cut-off events. For 64755/64755 co-relation queries the response was YES. Maximal size of possible extension queue 4280. Compared 849474 event pairs, 24508 based on Foata normal form. 1/122486 useless extension candidates. Maximal degree in co-relation 343210. Up to 81562 conditions per place. [2024-12-02 14:00:54,839 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 118 selfloop transitions, 13 changer transitions 3/139 dead transitions. [2024-12-02 14:00:54,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 139 transitions, 785 flow [2024-12-02 14:00:54,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 14:00:54,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-12-02 14:00:54,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 157 transitions. [2024-12-02 14:00:54,840 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.585820895522388 [2024-12-02 14:00:54,840 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 249 flow. Second operand 4 states and 157 transitions. [2024-12-02 14:00:54,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 139 transitions, 785 flow [2024-12-02 14:00:55,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 139 transitions, 741 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-12-02 14:00:55,576 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 361 flow [2024-12-02 14:00:55,576 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=361, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2024-12-02 14:00:55,576 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 6 predicate places. [2024-12-02 14:00:55,576 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 361 flow [2024-12-02 14:00:55,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 14:00:55,577 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 14:00:55,577 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:00:55,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-12-02 14:00:55,577 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 14:00:55,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:00:55,578 INFO L85 PathProgramCache]: Analyzing trace with hash -972395671, now seen corresponding path program 1 times [2024-12-02 14:00:55,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:00:55,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701028060] [2024-12-02 14:00:55,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:00:55,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:00:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:00:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 14:00:56,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:00:56,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701028060] [2024-12-02 14:00:56,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701028060] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:00:56,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935185164] [2024-12-02 14:00:56,287 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:00:56,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:00:56,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:00:56,289 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:00:56,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 14:00:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:00:56,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-12-02 14:00:56,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:00:56,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-12-02 14:00:56,846 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-12-02 14:00:56,846 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:00:57,009 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 14:00:57,009 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 25 treesize of output 12 [2024-12-02 14:00:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 14:00:57,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935185164] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 14:00:57,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 14:00:57,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 8] total 20 [2024-12-02 14:00:57,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888525634] [2024-12-02 14:00:57,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:00:57,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 14:00:57,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:00:57,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 14:00:57,084 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-12-02 14:00:57,084 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 67 [2024-12-02 14:00:57,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 361 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 14:00:57,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 14:00:57,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 67 [2024-12-02 14:00:57,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 14:01:07,390 INFO L124 PetriNetUnfolderBase]: 137150/177767 cut-off events. [2024-12-02 14:01:07,390 INFO L125 PetriNetUnfolderBase]: For 98875/98875 co-relation queries the response was YES. [2024-12-02 14:01:07,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 439971 conditions, 177767 events. 137150/177767 cut-off events. For 98875/98875 co-relation queries the response was YES. Maximal size of possible extension queue 5541. Compared 1094365 event pairs, 15302 based on Foata normal form. 1/153779 useless extension candidates. Maximal degree in co-relation 439922. Up to 135949 conditions per place. [2024-12-02 14:01:08,333 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 167 selfloop transitions, 41 changer transitions 4/217 dead transitions. [2024-12-02 14:01:08,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 217 transitions, 1272 flow [2024-12-02 14:01:08,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 14:01:08,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 14:01:08,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 272 transitions. [2024-12-02 14:01:08,334 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5074626865671642 [2024-12-02 14:01:08,335 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 361 flow. Second operand 8 states and 272 transitions. [2024-12-02 14:01:08,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 217 transitions, 1272 flow [2024-12-02 14:01:08,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 217 transitions, 1260 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-12-02 14:01:08,980 INFO L231 Difference]: Finished difference. Result has 83 places, 104 transitions, 750 flow [2024-12-02 14:01:08,980 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=750, PETRI_PLACES=83, PETRI_TRANSITIONS=104} [2024-12-02 14:01:08,981 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 17 predicate places. [2024-12-02 14:01:08,981 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 104 transitions, 750 flow [2024-12-02 14:01:08,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 14:01:08,981 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 14:01:08,981 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:01:08,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 14:01:09,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:01:09,182 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 14:01:09,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:01:09,182 INFO L85 PathProgramCache]: Analyzing trace with hash -906373227, now seen corresponding path program 1 times [2024-12-02 14:01:09,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:01:09,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073869295] [2024-12-02 14:01:09,182 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:01:09,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:01:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:01:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 14:01:09,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:01:09,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073869295] [2024-12-02 14:01:09,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073869295] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:01:09,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585413023] [2024-12-02 14:01:09,872 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:01:09,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:01:09,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:01:09,874 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:01:09,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 14:01:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:01:09,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-12-02 14:01:10,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:01:10,401 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 14:01:10,402 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 21 treesize of output 15 [2024-12-02 14:01:10,520 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 14:01:10,520 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:01:10,718 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-12-02 14:01:10,718 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 24 treesize of output 12 [2024-12-02 14:01:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 14:01:10,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585413023] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 14:01:10,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 14:01:10,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 23 [2024-12-02 14:01:10,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896497544] [2024-12-02 14:01:10,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:01:10,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 14:01:10,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:01:10,846 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 14:01:10,847 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2024-12-02 14:01:10,847 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 67 [2024-12-02 14:01:10,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 104 transitions, 750 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 14:01:10,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 14:01:10,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 67 [2024-12-02 14:01:10,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 14:01:23,628 INFO L124 PetriNetUnfolderBase]: 155680/201768 cut-off events. [2024-12-02 14:01:23,628 INFO L125 PetriNetUnfolderBase]: For 208355/208355 co-relation queries the response was YES. [2024-12-02 14:01:24,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543383 conditions, 201768 events. 155680/201768 cut-off events. For 208355/208355 co-relation queries the response was YES. Maximal size of possible extension queue 6497. Compared 1263755 event pairs, 23363 based on Foata normal form. 1/173827 useless extension candidates. Maximal degree in co-relation 543328. Up to 169440 conditions per place. [2024-12-02 14:01:24,612 INFO L140 encePairwiseOnDemand]: 57/67 looper letters, 230 selfloop transitions, 49 changer transitions 8/292 dead transitions. [2024-12-02 14:01:24,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 292 transitions, 1947 flow [2024-12-02 14:01:24,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 14:01:24,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-12-02 14:01:24,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 348 transitions. [2024-12-02 14:01:24,613 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5194029850746269 [2024-12-02 14:01:24,613 INFO L175 Difference]: Start difference. First operand has 83 places, 104 transitions, 750 flow. Second operand 10 states and 348 transitions. [2024-12-02 14:01:24,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 292 transitions, 1947 flow [2024-12-02 14:01:26,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 292 transitions, 1907 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-12-02 14:01:26,505 INFO L231 Difference]: Finished difference. Result has 97 places, 142 transitions, 1194 flow [2024-12-02 14:01:26,505 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1194, PETRI_PLACES=97, PETRI_TRANSITIONS=142} [2024-12-02 14:01:26,506 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 31 predicate places. [2024-12-02 14:01:26,506 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 142 transitions, 1194 flow [2024-12-02 14:01:26,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 14:01:26,506 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 14:01:26,506 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:01:26,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 14:01:26,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-12-02 14:01:26,706 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 14:01:26,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:01:26,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1033302229, now seen corresponding path program 2 times [2024-12-02 14:01:26,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:01:26,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406802842] [2024-12-02 14:01:26,707 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:01:26,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:01:26,719 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 14:01:26,719 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:01:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 14:01:26,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:01:26,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406802842] [2024-12-02 14:01:26,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406802842] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:01:26,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:01:26,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 14:01:26,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618729136] [2024-12-02 14:01:26,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:01:26,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 14:01:26,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:01:26,912 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 14:01:26,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-12-02 14:01:26,913 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 67 [2024-12-02 14:01:26,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 142 transitions, 1194 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 14:01:26,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 14:01:26,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 67 [2024-12-02 14:01:26,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 14:01:41,831 INFO L124 PetriNetUnfolderBase]: 161435/209204 cut-off events. [2024-12-02 14:01:41,831 INFO L125 PetriNetUnfolderBase]: For 306939/306939 co-relation queries the response was YES. [2024-12-02 14:01:42,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598079 conditions, 209204 events. 161435/209204 cut-off events. For 306939/306939 co-relation queries the response was YES. Maximal size of possible extension queue 6823. Compared 1315653 event pairs, 21641 based on Foata normal form. 1/180017 useless extension candidates. Maximal degree in co-relation 598017. Up to 179584 conditions per place. [2024-12-02 14:01:43,131 INFO L140 encePairwiseOnDemand]: 57/67 looper letters, 231 selfloop transitions, 45 changer transitions 5/286 dead transitions. [2024-12-02 14:01:43,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 286 transitions, 2262 flow [2024-12-02 14:01:43,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 14:01:43,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-12-02 14:01:43,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 289 transitions. [2024-12-02 14:01:43,133 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.539179104477612 [2024-12-02 14:01:43,133 INFO L175 Difference]: Start difference. First operand has 97 places, 142 transitions, 1194 flow. Second operand 8 states and 289 transitions. [2024-12-02 14:01:43,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 286 transitions, 2262 flow [2024-12-02 14:01:48,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 286 transitions, 2151 flow, removed 53 selfloop flow, removed 1 redundant places. [2024-12-02 14:01:48,765 INFO L231 Difference]: Finished difference. Result has 108 places, 164 transitions, 1492 flow [2024-12-02 14:01:48,765 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1492, PETRI_PLACES=108, PETRI_TRANSITIONS=164} [2024-12-02 14:01:48,765 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 42 predicate places. [2024-12-02 14:01:48,765 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 164 transitions, 1492 flow [2024-12-02 14:01:48,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 14:01:48,765 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 14:01:48,765 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:01:48,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-12-02 14:01:48,766 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 14:01:48,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:01:48,766 INFO L85 PathProgramCache]: Analyzing trace with hash -229498121, now seen corresponding path program 1 times [2024-12-02 14:01:48,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:01:48,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323323319] [2024-12-02 14:01:48,766 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:01:48,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:01:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:01:49,176 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 14:01:49,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:01:49,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323323319] [2024-12-02 14:01:49,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323323319] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:01:49,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385523306] [2024-12-02 14:01:49,176 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:01:49,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:01:49,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:01:49,178 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:01:49,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 14:01:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:01:49,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-12-02 14:01:49,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:01:49,614 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 14:01:49,614 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 21 treesize of output 15 [2024-12-02 14:01:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 14:01:49,702 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 14:01:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 14:01:49,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385523306] provided 1 perfect and 1 imperfect interpolant sequences [2024-12-02 14:01:49,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-12-02 14:01:49,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 23 [2024-12-02 14:01:49,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345398890] [2024-12-02 14:01:49,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:01:49,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 14:01:49,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:01:49,993 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 14:01:49,993 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-12-02 14:01:49,993 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 67 [2024-12-02 14:01:49,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 164 transitions, 1492 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 14:01:49,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 14:01:49,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 67 [2024-12-02 14:01:49,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 14:02:07,021 INFO L124 PetriNetUnfolderBase]: 173860/225331 cut-off events. [2024-12-02 14:02:07,022 INFO L125 PetriNetUnfolderBase]: For 378089/378089 co-relation queries the response was YES. [2024-12-02 14:02:07,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 658359 conditions, 225331 events. 173860/225331 cut-off events. For 378089/378089 co-relation queries the response was YES. Maximal size of possible extension queue 7274. Compared 1426043 event pairs, 27150 based on Foata normal form. 1/193469 useless extension candidates. Maximal degree in co-relation 658291. Up to 190859 conditions per place. [2024-12-02 14:02:08,572 INFO L140 encePairwiseOnDemand]: 57/67 looper letters, 255 selfloop transitions, 69 changer transitions 8/337 dead transitions. [2024-12-02 14:02:08,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 337 transitions, 2718 flow [2024-12-02 14:02:08,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 14:02:08,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-12-02 14:02:08,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 351 transitions. [2024-12-02 14:02:08,574 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5238805970149254 [2024-12-02 14:02:08,574 INFO L175 Difference]: Start difference. First operand has 108 places, 164 transitions, 1492 flow. Second operand 10 states and 351 transitions. [2024-12-02 14:02:08,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 337 transitions, 2718 flow [2024-12-02 14:02:15,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 337 transitions, 2663 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-12-02 14:02:15,950 INFO L231 Difference]: Finished difference. Result has 119 places, 185 transitions, 1884 flow [2024-12-02 14:02:15,950 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=1437, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1884, PETRI_PLACES=119, PETRI_TRANSITIONS=185} [2024-12-02 14:02:15,950 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 53 predicate places. [2024-12-02 14:02:15,950 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 185 transitions, 1884 flow [2024-12-02 14:02:15,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 14:02:15,950 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 14:02:15,950 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:02:15,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 14:02:16,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6b943f64-1b4e-4c52-b125-6b93e2d7f629/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-12-02 14:02:16,151 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 14:02:16,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:02:16,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1250780487, now seen corresponding path program 3 times [2024-12-02 14:02:16,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:02:16,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133986852] [2024-12-02 14:02:16,152 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:02:16,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:02:16,162 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-12-02 14:02:16,162 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:02:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 14:02:16,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:02:16,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133986852] [2024-12-02 14:02:16,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133986852] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:02:16,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:02:16,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 14:02:16,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548773556] [2024-12-02 14:02:16,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:02:16,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 14:02:16,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:02:16,344 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 14:02:16,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-12-02 14:02:16,345 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 67 [2024-12-02 14:02:16,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 185 transitions, 1884 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 14:02:16,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 14:02:16,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 67 [2024-12-02 14:02:16,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 14:02:35,011 INFO L124 PetriNetUnfolderBase]: 179699/232878 cut-off events. [2024-12-02 14:02:35,011 INFO L125 PetriNetUnfolderBase]: For 479793/479793 co-relation queries the response was YES. [2024-12-02 14:02:36,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 708134 conditions, 232878 events. 179699/232878 cut-off events. For 479793/479793 co-relation queries the response was YES. Maximal size of possible extension queue 7585. Compared 1478032 event pairs, 30517 based on Foata normal form. 1/199765 useless extension candidates. Maximal degree in co-relation 708062. Up to 201738 conditions per place. [2024-12-02 14:02:36,731 INFO L140 encePairwiseOnDemand]: 57/67 looper letters, 274 selfloop transitions, 71 changer transitions 7/357 dead transitions. [2024-12-02 14:02:36,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 357 transitions, 3208 flow [2024-12-02 14:02:36,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 14:02:36,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-12-02 14:02:36,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 332 transitions. [2024-12-02 14:02:36,732 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5505804311774462 [2024-12-02 14:02:36,732 INFO L175 Difference]: Start difference. First operand has 119 places, 185 transitions, 1884 flow. Second operand 9 states and 332 transitions. [2024-12-02 14:02:36,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 357 transitions, 3208 flow [2024-12-02 14:02:49,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 357 transitions, 3103 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-12-02 14:02:49,207 INFO L231 Difference]: Finished difference. Result has 125 places, 210 transitions, 2319 flow [2024-12-02 14:02:49,207 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=1783, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2319, PETRI_PLACES=125, PETRI_TRANSITIONS=210} [2024-12-02 14:02:49,208 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 59 predicate places. [2024-12-02 14:02:49,208 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 210 transitions, 2319 flow [2024-12-02 14:02:49,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 14:02:49,208 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 14:02:49,208 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:02:49,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-12-02 14:02:49,208 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 14:02:49,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:02:49,209 INFO L85 PathProgramCache]: Analyzing trace with hash 2032108915, now seen corresponding path program 2 times [2024-12-02 14:02:49,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:02:49,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414906331] [2024-12-02 14:02:49,209 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 14:02:49,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:02:49,220 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 14:02:49,220 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:02:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 14:02:49,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:02:49,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414906331] [2024-12-02 14:02:49,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414906331] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:02:49,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:02:49,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 14:02:49,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028506200] [2024-12-02 14:02:49,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:02:49,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 14:02:49,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:02:49,364 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 14:02:49,364 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-12-02 14:02:49,365 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 67 [2024-12-02 14:02:49,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 210 transitions, 2319 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 14:02:49,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 14:02:49,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 67 [2024-12-02 14:02:49,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-12-02 14:03:09,499 INFO L124 PetriNetUnfolderBase]: 187625/243165 cut-off events. [2024-12-02 14:03:09,499 INFO L125 PetriNetUnfolderBase]: For 594722/594722 co-relation queries the response was YES. [2024-12-02 14:03:10,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 764011 conditions, 243165 events. 187625/243165 cut-off events. For 594722/594722 co-relation queries the response was YES. Maximal size of possible extension queue 7962. Compared 1549251 event pairs, 33737 based on Foata normal form. 1/208422 useless extension candidates. Maximal degree in co-relation 763936. Up to 222681 conditions per place. [2024-12-02 14:03:11,264 INFO L140 encePairwiseOnDemand]: 57/67 looper letters, 249 selfloop transitions, 62 changer transitions 4/320 dead transitions. [2024-12-02 14:03:11,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 320 transitions, 3366 flow [2024-12-02 14:03:11,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 14:03:11,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-12-02 14:03:11,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 251 transitions. [2024-12-02 14:03:11,266 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.535181236673774 [2024-12-02 14:03:11,266 INFO L175 Difference]: Start difference. First operand has 125 places, 210 transitions, 2319 flow. Second operand 7 states and 251 transitions. [2024-12-02 14:03:11,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 320 transitions, 3366 flow [2024-12-02 14:03:29,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 320 transitions, 3251 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-12-02 14:03:29,879 INFO L231 Difference]: Finished difference. Result has 128 places, 224 transitions, 2593 flow [2024-12-02 14:03:29,880 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=2204, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2593, PETRI_PLACES=128, PETRI_TRANSITIONS=224} [2024-12-02 14:03:29,880 INFO L279 CegarLoopForPetriNet]: 66 programPoint places, 62 predicate places. [2024-12-02 14:03:29,880 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 224 transitions, 2593 flow [2024-12-02 14:03:29,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 14:03:29,880 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-12-02 14:03:29,880 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:03:29,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-12-02 14:03:29,880 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-12-02 14:03:29,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:03:29,881 INFO L85 PathProgramCache]: Analyzing trace with hash 2061995173, now seen corresponding path program 3 times [2024-12-02 14:03:29,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:03:29,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891550686] [2024-12-02 14:03:29,881 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 14:03:29,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:03:29,892 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-12-02 14:03:29,892 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 14:03:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 14:03:30,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:03:30,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891550686] [2024-12-02 14:03:30,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891550686] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:03:30,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:03:30,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 14:03:30,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465607653] [2024-12-02 14:03:30,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:03:30,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 14:03:30,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:03:30,025 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 14:03:30,025 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-12-02 14:03:30,025 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 67 [2024-12-02 14:03:30,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 224 transitions, 2593 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 14:03:30,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-12-02 14:03:30,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 67 [2024-12-02 14:03:30,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand