./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/bigshot_s2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/bigshot_s2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU --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 fa644cc26c2bb4f900e6af52233648196eb4dff503d36a50559ddcf2a4270ffb --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:19:26,428 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:19:26,509 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:19:26,515 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:19:26,518 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:19:26,542 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:19:26,543 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:19:26,544 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:19:26,544 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:19:26,545 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:19:26,545 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:19:26,546 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:19:26,546 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:19:26,547 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:19:26,547 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:19:26,548 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:19:26,548 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:19:26,549 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:19:26,549 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:19:26,550 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:19:26,550 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:19:26,551 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:19:26,551 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:19:26,552 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:19:26,552 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:19:26,552 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:19:26,553 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:19:26,553 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:19:26,553 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:19:26,554 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:19:26,554 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:19:26,554 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:19:26,555 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:19:26,555 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:19:26,556 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:19:26,556 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:19:26,557 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:19:26,557 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:19:26,557 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:19:26,558 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:19:26,558 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:19:26,559 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:19:26,559 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa644cc26c2bb4f900e6af52233648196eb4dff503d36a50559ddcf2a4270ffb [2024-10-31 22:19:26,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:19:26,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:19:26,851 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:19:26,852 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:19:26,853 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:19:26,854 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/pthread/bigshot_s2.i Unable to find full path for "g++" [2024-10-31 22:19:28,940 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:19:29,276 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:19:29,276 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/sv-benchmarks/c/pthread/bigshot_s2.i [2024-10-31 22:19:29,299 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/data/1260cced1/45175ca44fb6456ea116e3f6bd83b0b9/FLAG46fb54905 [2024-10-31 22:19:29,498 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/data/1260cced1/45175ca44fb6456ea116e3f6bd83b0b9 [2024-10-31 22:19:29,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:19:29,502 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:19:29,503 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:19:29,504 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:19:29,510 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:19:29,511 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:19:29" (1/1) ... [2024-10-31 22:19:29,512 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@777b2b10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:29, skipping insertion in model container [2024-10-31 22:19:29,512 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:19:29" (1/1) ... [2024-10-31 22:19:29,582 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:19:30,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:19:30,253 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:19:30,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:19:30,377 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:19:30,377 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:30 WrapperNode [2024-10-31 22:19:30,377 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:19:30,378 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:19:30,379 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:19:30,379 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:19:30,387 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:30" (1/1) ... [2024-10-31 22:19:30,406 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:30" (1/1) ... [2024-10-31 22:19:30,429 INFO L138 Inliner]: procedures = 322, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 63 [2024-10-31 22:19:30,430 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:19:30,430 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:19:30,431 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:19:30,431 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:19:30,443 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:30" (1/1) ... [2024-10-31 22:19:30,443 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:30" (1/1) ... [2024-10-31 22:19:30,446 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:30" (1/1) ... [2024-10-31 22:19:30,462 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 9, 2]. 69 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 1 writes are split as follows [0, 0, 1]. [2024-10-31 22:19:30,462 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:30" (1/1) ... [2024-10-31 22:19:30,463 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:30" (1/1) ... [2024-10-31 22:19:30,469 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:30" (1/1) ... [2024-10-31 22:19:30,473 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:30" (1/1) ... [2024-10-31 22:19:30,475 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:30" (1/1) ... [2024-10-31 22:19:30,476 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:30" (1/1) ... [2024-10-31 22:19:30,479 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:19:30,480 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:19:30,481 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:19:30,481 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:19:30,482 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:30" (1/1) ... [2024-10-31 22:19:30,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:19:30,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:30,522 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:19:30,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:19:30,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-10-31 22:19:30,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-10-31 22:19:30,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2024-10-31 22:19:30,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:19:30,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:19:30,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:19:30,560 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:19:30,560 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:19:30,561 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:19:30,561 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:19:30,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:19:30,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:19:30,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:19:30,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:19:30,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:19:30,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:19:30,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:19:30,566 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:19:30,706 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:19:30,708 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:19:30,920 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:19:30,920 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:19:31,077 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:19:31,077 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-31 22:19:31,077 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:19:31 BoogieIcfgContainer [2024-10-31 22:19:31,078 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:19:31,080 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:19:31,081 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:19:31,084 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:19:31,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:19:29" (1/3) ... [2024-10-31 22:19:31,085 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80b5c8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:19:31, skipping insertion in model container [2024-10-31 22:19:31,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:19:30" (2/3) ... [2024-10-31 22:19:31,086 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@80b5c8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:19:31, skipping insertion in model container [2024-10-31 22:19:31,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:19:31" (3/3) ... [2024-10-31 22:19:31,088 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s2.i [2024-10-31 22:19:31,106 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:19:31,106 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-10-31 22:19:31,106 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:19:31,178 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:19:31,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 43 transitions, 100 flow [2024-10-31 22:19:31,274 INFO L124 PetriNetUnfolderBase]: 5/41 cut-off events. [2024-10-31 22:19:31,274 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:19:31,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 41 events. 5/41 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 73 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2024-10-31 22:19:31,277 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 43 transitions, 100 flow [2024-10-31 22:19:31,286 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 40 transitions, 92 flow [2024-10-31 22:19:31,305 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:19:31,316 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;@7a8da72c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:19:31,320 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-10-31 22:19:31,334 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:19:31,334 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2024-10-31 22:19:31,334 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:19:31,338 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:19:31,339 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:31,339 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:19:31,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:31,344 INFO L85 PathProgramCache]: Analyzing trace with hash -976161480, now seen corresponding path program 1 times [2024-10-31 22:19:31,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:31,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829353434] [2024-10-31 22:19:31,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:31,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:31,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:31,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829353434] [2024-10-31 22:19:31,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829353434] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:19:31,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:19:31,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:19:31,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717972080] [2024-10-31 22:19:31,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:19:31,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:19:31,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:31,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:19:31,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:19:32,027 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-10-31 22:19:32,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:32,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:19:32,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-10-31 22:19:32,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:19:32,115 INFO L124 PetriNetUnfolderBase]: 10/56 cut-off events. [2024-10-31 22:19:32,116 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:19:32,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 56 events. 10/56 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 145 event pairs, 3 based on Foata normal form. 2/49 useless extension candidates. Maximal degree in co-relation 79. Up to 23 conditions per place. [2024-10-31 22:19:32,118 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 18 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2024-10-31 22:19:32,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 124 flow [2024-10-31 22:19:32,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:19:32,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:19:32,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-10-31 22:19:32,131 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5232558139534884 [2024-10-31 22:19:32,133 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 92 flow. Second operand 4 states and 90 transitions. [2024-10-31 22:19:32,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 124 flow [2024-10-31 22:19:32,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 116 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:19:32,139 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 78 flow [2024-10-31 22:19:32,141 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-10-31 22:19:32,145 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2024-10-31 22:19:32,145 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 78 flow [2024-10-31 22:19:32,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:32,145 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:19:32,145 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:32,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:19:32,146 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:19:32,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:32,147 INFO L85 PathProgramCache]: Analyzing trace with hash -196234554, now seen corresponding path program 1 times [2024-10-31 22:19:32,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:32,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695393764] [2024-10-31 22:19:32,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:32,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:32,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:32,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695393764] [2024-10-31 22:19:32,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695393764] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:19:32,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:19:32,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:19:32,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918359021] [2024-10-31 22:19:32,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:19:32,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:19:32,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:32,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:19:32,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:19:32,498 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-10-31 22:19:32,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 78 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:32,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:19:32,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-10-31 22:19:32,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:19:32,610 INFO L124 PetriNetUnfolderBase]: 15/72 cut-off events. [2024-10-31 22:19:32,611 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-31 22:19:32,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 72 events. 15/72 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 163 event pairs, 7 based on Foata normal form. 2/62 useless extension candidates. Maximal degree in co-relation 48. Up to 39 conditions per place. [2024-10-31 22:19:32,612 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 21 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2024-10-31 22:19:32,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 138 flow [2024-10-31 22:19:32,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:19:32,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:19:32,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-10-31 22:19:32,614 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5523255813953488 [2024-10-31 22:19:32,615 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 78 flow. Second operand 4 states and 95 transitions. [2024-10-31 22:19:32,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 138 flow [2024-10-31 22:19:32,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 130 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:19:32,617 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 95 flow [2024-10-31 22:19:32,617 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2024-10-31 22:19:32,618 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2024-10-31 22:19:32,618 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 95 flow [2024-10-31 22:19:32,618 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:32,618 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:19:32,619 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:32,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:19:32,619 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:19:32,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:32,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1788303622, now seen corresponding path program 1 times [2024-10-31 22:19:32,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:32,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459014185] [2024-10-31 22:19:32,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:32,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:32,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:32,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:32,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459014185] [2024-10-31 22:19:32,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459014185] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:19:32,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:19:32,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:19:32,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087135383] [2024-10-31 22:19:32,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:19:32,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:19:32,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:32,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:19:32,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:19:32,748 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-10-31 22:19:32,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 95 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) [2024-10-31 22:19:32,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:19:32,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-10-31 22:19:32,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:19:32,827 INFO L124 PetriNetUnfolderBase]: 14/73 cut-off events. [2024-10-31 22:19:32,827 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-10-31 22:19:32,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 73 events. 14/73 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 155 event pairs, 1 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 45. Up to 20 conditions per place. [2024-10-31 22:19:32,828 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 18 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2024-10-31 22:19:32,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 139 flow [2024-10-31 22:19:32,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:19:32,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:19:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-10-31 22:19:32,830 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5465116279069767 [2024-10-31 22:19:32,831 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 95 flow. Second operand 4 states and 94 transitions. [2024-10-31 22:19:32,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 139 flow [2024-10-31 22:19:32,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:19:32,832 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 94 flow [2024-10-31 22:19:32,833 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2024-10-31 22:19:32,833 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2024-10-31 22:19:32,834 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 94 flow [2024-10-31 22:19:32,834 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) [2024-10-31 22:19:32,834 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:19:32,834 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:32,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:19:32,835 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:19:32,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:32,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1954874215, now seen corresponding path program 1 times [2024-10-31 22:19:32,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:32,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769604879] [2024-10-31 22:19:32,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:32,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:32,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:32,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769604879] [2024-10-31 22:19:32,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769604879] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:19:32,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:19:32,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:19:32,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006154956] [2024-10-31 22:19:32,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:19:32,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:19:32,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:32,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:19:32,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:19:32,873 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-10-31 22:19:32,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:32,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:19:32,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-10-31 22:19:32,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:19:32,922 INFO L124 PetriNetUnfolderBase]: 11/64 cut-off events. [2024-10-31 22:19:32,922 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-10-31 22:19:32,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128 conditions, 64 events. 11/64 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 133 event pairs, 6 based on Foata normal form. 2/61 useless extension candidates. Maximal degree in co-relation 54. Up to 33 conditions per place. [2024-10-31 22:19:32,923 INFO L140 encePairwiseOnDemand]: 41/43 looper letters, 19 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2024-10-31 22:19:32,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 134 flow [2024-10-31 22:19:32,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:19:32,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:19:32,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-10-31 22:19:32,924 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-10-31 22:19:32,925 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 94 flow. Second operand 3 states and 79 transitions. [2024-10-31 22:19:32,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 134 flow [2024-10-31 22:19:32,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 34 transitions, 126 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:19:32,927 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 86 flow [2024-10-31 22:19:32,927 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2024-10-31 22:19:32,928 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2024-10-31 22:19:32,929 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 86 flow [2024-10-31 22:19:32,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:32,930 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:19:32,930 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:32,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:19:32,930 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:19:32,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:32,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1953818464, now seen corresponding path program 1 times [2024-10-31 22:19:32,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:32,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017948927] [2024-10-31 22:19:32,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:32,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:33,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:33,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017948927] [2024-10-31 22:19:33,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017948927] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:19:33,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:19:33,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:19:33,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574991486] [2024-10-31 22:19:33,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:19:33,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:19:33,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:33,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:19:33,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:19:33,162 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 43 [2024-10-31 22:19:33,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:33,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:19:33,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 43 [2024-10-31 22:19:33,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:19:33,263 INFO L124 PetriNetUnfolderBase]: 12/61 cut-off events. [2024-10-31 22:19:33,263 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-31 22:19:33,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 61 events. 12/61 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 107 event pairs, 5 based on Foata normal form. 2/60 useless extension candidates. Maximal degree in co-relation 101. Up to 30 conditions per place. [2024-10-31 22:19:33,264 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 19 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2024-10-31 22:19:33,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 35 transitions, 136 flow [2024-10-31 22:19:33,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:19:33,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:19:33,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-10-31 22:19:33,269 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5872093023255814 [2024-10-31 22:19:33,269 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 86 flow. Second operand 4 states and 101 transitions. [2024-10-31 22:19:33,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 35 transitions, 136 flow [2024-10-31 22:19:33,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:19:33,288 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 96 flow [2024-10-31 22:19:33,288 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2024-10-31 22:19:33,289 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2024-10-31 22:19:33,289 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 96 flow [2024-10-31 22:19:33,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:33,291 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:19:33,292 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:33,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:19:33,292 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:19:33,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:33,293 INFO L85 PathProgramCache]: Analyzing trace with hash 696805413, now seen corresponding path program 1 times [2024-10-31 22:19:33,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:33,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405110525] [2024-10-31 22:19:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:33,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:33,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:33,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:33,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405110525] [2024-10-31 22:19:33,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405110525] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:33,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11521251] [2024-10-31 22:19:33,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:33,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:33,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:33,530 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:33,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:19:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:33,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-31 22:19:33,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:33,720 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:19:33,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:19:33,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-31 22:19:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:33,955 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:34,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11521251] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:34,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:34,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 11 [2024-10-31 22:19:34,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601636868] [2024-10-31 22:19:34,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:34,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:19:34,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:34,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:19:34,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:19:34,576 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-10-31 22:19:34,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 96 flow. Second operand has 13 states, 13 states have (on average 18.23076923076923) internal successors, (237), 13 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:34,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:19:34,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-10-31 22:19:34,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:19:34,892 INFO L124 PetriNetUnfolderBase]: 30/120 cut-off events. [2024-10-31 22:19:34,892 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-10-31 22:19:34,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 120 events. 30/120 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 214 event pairs, 6 based on Foata normal form. 12/132 useless extension candidates. Maximal degree in co-relation 232. Up to 35 conditions per place. [2024-10-31 22:19:34,893 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 30 selfloop transitions, 11 changer transitions 0/50 dead transitions. [2024-10-31 22:19:34,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 220 flow [2024-10-31 22:19:34,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:19:34,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:19:34,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-10-31 22:19:34,895 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5049833887043189 [2024-10-31 22:19:34,895 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 96 flow. Second operand 7 states and 152 transitions. [2024-10-31 22:19:34,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 220 flow [2024-10-31 22:19:34,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 212 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:19:34,898 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 150 flow [2024-10-31 22:19:34,898 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2024-10-31 22:19:34,899 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-10-31 22:19:34,899 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 150 flow [2024-10-31 22:19:34,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.23076923076923) internal successors, (237), 13 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:34,899 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:19:34,900 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:34,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-31 22:19:35,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:35,101 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:19:35,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:35,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1762716273, now seen corresponding path program 1 times [2024-10-31 22:19:35,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:35,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714070510] [2024-10-31 22:19:35,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:35,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:35,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:35,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:35,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714070510] [2024-10-31 22:19:35,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714070510] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:35,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806209931] [2024-10-31 22:19:35,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:35,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:35,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:35,341 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:35,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:19:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:35,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:19:35,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:35,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 22:19:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:35,588 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:35,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806209931] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:35,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:35,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-10-31 22:19:35,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436505395] [2024-10-31 22:19:35,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:35,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:19:35,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:35,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:19:35,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:19:35,888 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-10-31 22:19:35,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 150 flow. Second operand has 11 states, 11 states have (on average 20.90909090909091) internal successors, (230), 11 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:35,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:19:35,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-10-31 22:19:35,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:19:36,123 INFO L124 PetriNetUnfolderBase]: 25/111 cut-off events. [2024-10-31 22:19:36,123 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2024-10-31 22:19:36,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 111 events. 25/111 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 180 event pairs, 4 based on Foata normal form. 6/115 useless extension candidates. Maximal degree in co-relation 240. Up to 29 conditions per place. [2024-10-31 22:19:36,124 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 26 selfloop transitions, 11 changer transitions 0/48 dead transitions. [2024-10-31 22:19:36,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 48 transitions, 248 flow [2024-10-31 22:19:36,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:19:36,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:19:36,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-10-31 22:19:36,126 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5514950166112956 [2024-10-31 22:19:36,126 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 150 flow. Second operand 7 states and 166 transitions. [2024-10-31 22:19:36,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 48 transitions, 248 flow [2024-10-31 22:19:36,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 48 transitions, 232 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-10-31 22:19:36,130 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 184 flow [2024-10-31 22:19:36,130 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=184, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2024-10-31 22:19:36,131 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-10-31 22:19:36,131 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 184 flow [2024-10-31 22:19:36,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.90909090909091) internal successors, (230), 11 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:36,132 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:19:36,132 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:36,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-31 22:19:36,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:36,333 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:19:36,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:36,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1316447649, now seen corresponding path program 1 times [2024-10-31 22:19:36,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:36,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513006258] [2024-10-31 22:19:36,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:36,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:36,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:36,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513006258] [2024-10-31 22:19:36,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513006258] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:19:36,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:19:36,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-31 22:19:36,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687874919] [2024-10-31 22:19:36,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:19:36,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:19:36,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:36,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:19:36,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:19:36,658 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-10-31 22:19:36,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 184 flow. Second operand has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:36,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:19:36,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-10-31 22:19:36,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:19:36,849 INFO L124 PetriNetUnfolderBase]: 24/123 cut-off events. [2024-10-31 22:19:36,849 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2024-10-31 22:19:36,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 123 events. 24/123 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 236 event pairs, 12 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 299. Up to 51 conditions per place. [2024-10-31 22:19:36,851 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 28 selfloop transitions, 9 changer transitions 0/49 dead transitions. [2024-10-31 22:19:36,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 49 transitions, 283 flow [2024-10-31 22:19:36,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:19:36,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-31 22:19:36,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-10-31 22:19:36,852 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49767441860465117 [2024-10-31 22:19:36,852 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 184 flow. Second operand 10 states and 214 transitions. [2024-10-31 22:19:36,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 49 transitions, 283 flow [2024-10-31 22:19:36,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 49 transitions, 269 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-31 22:19:36,856 INFO L231 Difference]: Finished difference. Result has 61 places, 42 transitions, 218 flow [2024-10-31 22:19:36,857 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=218, PETRI_PLACES=61, PETRI_TRANSITIONS=42} [2024-10-31 22:19:36,857 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-10-31 22:19:36,857 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 42 transitions, 218 flow [2024-10-31 22:19:36,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:36,858 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:19:36,858 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:36,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:19:36,858 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:19:36,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:36,859 INFO L85 PathProgramCache]: Analyzing trace with hash -815916709, now seen corresponding path program 1 times [2024-10-31 22:19:36,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:36,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576195120] [2024-10-31 22:19:36,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:36,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:37,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:37,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576195120] [2024-10-31 22:19:37,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576195120] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:19:37,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:19:37,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-31 22:19:37,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35710061] [2024-10-31 22:19:37,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:19:37,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:19:37,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:37,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:19:37,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:19:37,371 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 43 [2024-10-31 22:19:37,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 42 transitions, 218 flow. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:37,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:19:37,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 43 [2024-10-31 22:19:37,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:19:37,558 INFO L124 PetriNetUnfolderBase]: 20/115 cut-off events. [2024-10-31 22:19:37,558 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2024-10-31 22:19:37,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 115 events. 20/115 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 212 event pairs, 9 based on Foata normal form. 1/115 useless extension candidates. Maximal degree in co-relation 308. Up to 42 conditions per place. [2024-10-31 22:19:37,560 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 21 selfloop transitions, 7 changer transitions 5/47 dead transitions. [2024-10-31 22:19:37,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 47 transitions, 293 flow [2024-10-31 22:19:37,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:19:37,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:19:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-10-31 22:19:37,563 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5193798449612403 [2024-10-31 22:19:37,563 INFO L175 Difference]: Start difference. First operand has 61 places, 42 transitions, 218 flow. Second operand 9 states and 201 transitions. [2024-10-31 22:19:37,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 47 transitions, 293 flow [2024-10-31 22:19:37,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 47 transitions, 285 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:19:37,568 INFO L231 Difference]: Finished difference. Result has 66 places, 39 transitions, 203 flow [2024-10-31 22:19:37,568 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=203, PETRI_PLACES=66, PETRI_TRANSITIONS=39} [2024-10-31 22:19:37,571 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-10-31 22:19:37,571 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 39 transitions, 203 flow [2024-10-31 22:19:37,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:37,571 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:19:37,572 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:37,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:19:37,572 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:19:37,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:37,572 INFO L85 PathProgramCache]: Analyzing trace with hash -2043120856, now seen corresponding path program 1 times [2024-10-31 22:19:37,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:37,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36930976] [2024-10-31 22:19:37,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:37,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:37,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:37,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:37,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36930976] [2024-10-31 22:19:37,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36930976] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:37,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783545365] [2024-10-31 22:19:37,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:37,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:37,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:37,801 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:37,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:19:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:37,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-31 22:19:37,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:38,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-31 22:19:38,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:38,091 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:38,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783545365] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:38,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:38,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-10-31 22:19:38,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815835640] [2024-10-31 22:19:38,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:38,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:19:38,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:38,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:19:38,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:19:38,407 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-10-31 22:19:38,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 39 transitions, 203 flow. Second operand has 14 states, 14 states have (on average 23.0) internal successors, (322), 14 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:38,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:19:38,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-10-31 22:19:38,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:19:38,654 INFO L124 PetriNetUnfolderBase]: 19/107 cut-off events. [2024-10-31 22:19:38,654 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2024-10-31 22:19:38,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309 conditions, 107 events. 19/107 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 178 event pairs, 9 based on Foata normal form. 2/109 useless extension candidates. Maximal degree in co-relation 286. Up to 40 conditions per place. [2024-10-31 22:19:38,657 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 23 selfloop transitions, 6 changer transitions 1/43 dead transitions. [2024-10-31 22:19:38,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 43 transitions, 266 flow [2024-10-31 22:19:38,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:19:38,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:19:38,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-10-31 22:19:38,659 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5614617940199336 [2024-10-31 22:19:38,660 INFO L175 Difference]: Start difference. First operand has 66 places, 39 transitions, 203 flow. Second operand 7 states and 169 transitions. [2024-10-31 22:19:38,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 43 transitions, 266 flow [2024-10-31 22:19:38,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 43 transitions, 248 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-10-31 22:19:38,663 INFO L231 Difference]: Finished difference. Result has 62 places, 38 transitions, 195 flow [2024-10-31 22:19:38,664 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=195, PETRI_PLACES=62, PETRI_TRANSITIONS=38} [2024-10-31 22:19:38,667 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-10-31 22:19:38,667 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 38 transitions, 195 flow [2024-10-31 22:19:38,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.0) internal successors, (322), 14 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:38,667 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:19:38,668 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:38,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-31 22:19:38,872 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 22:19:38,873 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:19:38,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:38,874 INFO L85 PathProgramCache]: Analyzing trace with hash -17712933, now seen corresponding path program 2 times [2024-10-31 22:19:38,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:38,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892130457] [2024-10-31 22:19:38,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:38,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:39,170 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:39,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:39,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892130457] [2024-10-31 22:19:39,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892130457] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:39,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852148687] [2024-10-31 22:19:39,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:19:39,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:39,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:39,173 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:39,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:19:39,296 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:19:39,296 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:19:39,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-31 22:19:39,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:39,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-31 22:19:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:39,584 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:39,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852148687] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:39,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:39,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-10-31 22:19:39,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672737264] [2024-10-31 22:19:39,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:39,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-31 22:19:39,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:39,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-31 22:19:39,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-10-31 22:19:40,141 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-10-31 22:19:40,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 38 transitions, 195 flow. Second operand has 17 states, 17 states have (on average 22.941176470588236) internal successors, (390), 17 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:40,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:19:40,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-10-31 22:19:40,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:19:40,429 INFO L124 PetriNetUnfolderBase]: 15/101 cut-off events. [2024-10-31 22:19:40,429 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2024-10-31 22:19:40,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 101 events. 15/101 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 140 event pairs, 6 based on Foata normal form. 2/103 useless extension candidates. Maximal degree in co-relation 257. Up to 31 conditions per place. [2024-10-31 22:19:40,430 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 23 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2024-10-31 22:19:40,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 43 transitions, 262 flow [2024-10-31 22:19:40,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:19:40,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:19:40,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-10-31 22:19:40,432 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5552325581395349 [2024-10-31 22:19:40,432 INFO L175 Difference]: Start difference. First operand has 62 places, 38 transitions, 195 flow. Second operand 8 states and 191 transitions. [2024-10-31 22:19:40,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 43 transitions, 262 flow [2024-10-31 22:19:40,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 43 transitions, 250 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-10-31 22:19:40,434 INFO L231 Difference]: Finished difference. Result has 65 places, 38 transitions, 202 flow [2024-10-31 22:19:40,435 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=202, PETRI_PLACES=65, PETRI_TRANSITIONS=38} [2024-10-31 22:19:40,435 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2024-10-31 22:19:40,435 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 38 transitions, 202 flow [2024-10-31 22:19:40,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 22.941176470588236) internal successors, (390), 17 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:40,436 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:19:40,436 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:40,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:19:40,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:40,637 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:19:40,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:40,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1167425722, now seen corresponding path program 2 times [2024-10-31 22:19:40,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:40,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655577280] [2024-10-31 22:19:40,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:40,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:40,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:40,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655577280] [2024-10-31 22:19:40,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655577280] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:40,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463734975] [2024-10-31 22:19:40,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:19:40,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:40,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:40,956 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:40,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:19:41,055 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:19:41,056 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:19:41,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-31 22:19:41,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:41,109 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:19:41,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:19:41,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-31 22:19:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:41,535 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:41,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463734975] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:41,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:41,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-10-31 22:19:41,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359241790] [2024-10-31 22:19:41,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:41,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-31 22:19:41,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:41,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-31 22:19:41,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2024-10-31 22:19:42,635 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-10-31 22:19:42,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 38 transitions, 202 flow. Second operand has 23 states, 23 states have (on average 18.391304347826086) internal successors, (423), 23 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:42,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:19:42,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-10-31 22:19:42,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:19:43,226 INFO L124 PetriNetUnfolderBase]: 48/190 cut-off events. [2024-10-31 22:19:43,226 INFO L125 PetriNetUnfolderBase]: For 403/403 co-relation queries the response was YES. [2024-10-31 22:19:43,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 190 events. 48/190 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 287 event pairs, 6 based on Foata normal form. 8/198 useless extension candidates. Maximal degree in co-relation 589. Up to 38 conditions per place. [2024-10-31 22:19:43,228 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 46 selfloop transitions, 16 changer transitions 0/72 dead transitions. [2024-10-31 22:19:43,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 72 transitions, 486 flow [2024-10-31 22:19:43,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 22:19:43,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-31 22:19:43,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-10-31 22:19:43,233 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-10-31 22:19:43,233 INFO L175 Difference]: Start difference. First operand has 65 places, 38 transitions, 202 flow. Second operand 11 states and 231 transitions. [2024-10-31 22:19:43,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 72 transitions, 486 flow [2024-10-31 22:19:43,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 72 transitions, 470 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-10-31 22:19:43,237 INFO L231 Difference]: Finished difference. Result has 74 places, 47 transitions, 327 flow [2024-10-31 22:19:43,238 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=327, PETRI_PLACES=74, PETRI_TRANSITIONS=47} [2024-10-31 22:19:43,238 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-10-31 22:19:43,238 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 47 transitions, 327 flow [2024-10-31 22:19:43,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 18.391304347826086) internal successors, (423), 23 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:43,239 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:19:43,239 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:43,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-31 22:19:43,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:43,440 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:19:43,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:43,440 INFO L85 PathProgramCache]: Analyzing trace with hash 909662780, now seen corresponding path program 2 times [2024-10-31 22:19:43,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:43,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902156513] [2024-10-31 22:19:43,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:43,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:43,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:43,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902156513] [2024-10-31 22:19:43,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902156513] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:43,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298132169] [2024-10-31 22:19:43,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:19:43,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:43,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:43,736 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:43,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:19:43,822 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-31 22:19:43,822 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:19:43,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-31 22:19:43,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:43,867 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:19:43,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:19:43,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-31 22:19:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-31 22:19:44,426 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-31 22:19:45,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298132169] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:45,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:45,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 15 [2024-10-31 22:19:45,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716284837] [2024-10-31 22:19:45,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:45,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 22:19:45,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:45,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 22:19:45,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-10-31 22:19:45,522 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 43 [2024-10-31 22:19:45,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 47 transitions, 327 flow. Second operand has 16 states, 16 states have (on average 19.8125) internal successors, (317), 16 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:45,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:19:45,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 43 [2024-10-31 22:19:45,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:19:46,262 INFO L124 PetriNetUnfolderBase]: 55/189 cut-off events. [2024-10-31 22:19:46,262 INFO L125 PetriNetUnfolderBase]: For 587/587 co-relation queries the response was YES. [2024-10-31 22:19:46,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 189 events. 55/189 cut-off events. For 587/587 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 261 event pairs, 2 based on Foata normal form. 8/197 useless extension candidates. Maximal degree in co-relation 629. Up to 45 conditions per place. [2024-10-31 22:19:46,264 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 44 selfloop transitions, 24 changer transitions 0/76 dead transitions. [2024-10-31 22:19:46,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 76 transitions, 545 flow [2024-10-31 22:19:46,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-31 22:19:46,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-31 22:19:46,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 337 transitions. [2024-10-31 22:19:46,269 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46101231190150477 [2024-10-31 22:19:46,270 INFO L175 Difference]: Start difference. First operand has 74 places, 47 transitions, 327 flow. Second operand 17 states and 337 transitions. [2024-10-31 22:19:46,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 76 transitions, 545 flow [2024-10-31 22:19:46,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 76 transitions, 519 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-31 22:19:46,277 INFO L231 Difference]: Finished difference. Result has 81 places, 51 transitions, 366 flow [2024-10-31 22:19:46,278 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=366, PETRI_PLACES=81, PETRI_TRANSITIONS=51} [2024-10-31 22:19:46,279 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-10-31 22:19:46,279 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 51 transitions, 366 flow [2024-10-31 22:19:46,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 19.8125) internal successors, (317), 16 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:46,281 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:19:46,282 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:46,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:19:46,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-31 22:19:46,483 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:19:46,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:46,483 INFO L85 PathProgramCache]: Analyzing trace with hash -866977162, now seen corresponding path program 3 times [2024-10-31 22:19:46,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:46,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127303549] [2024-10-31 22:19:46,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:46,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:46,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:46,902 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:46,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:46,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127303549] [2024-10-31 22:19:46,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127303549] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:46,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581572205] [2024-10-31 22:19:46,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:19:46,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:46,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:46,905 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:46,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:19:47,021 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-31 22:19:47,021 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:19:47,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-31 22:19:47,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:47,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-31 22:19:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:47,317 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:47,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581572205] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:47,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:47,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-10-31 22:19:47,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625855204] [2024-10-31 22:19:47,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:47,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-31 22:19:47,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:47,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-31 22:19:47,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-10-31 22:19:48,015 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-10-31 22:19:48,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 51 transitions, 366 flow. Second operand has 20 states, 20 states have (on average 22.7) internal successors, (454), 20 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:48,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:19:48,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-10-31 22:19:48,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:19:48,345 INFO L124 PetriNetUnfolderBase]: 32/164 cut-off events. [2024-10-31 22:19:48,345 INFO L125 PetriNetUnfolderBase]: For 569/569 co-relation queries the response was YES. [2024-10-31 22:19:48,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 577 conditions, 164 events. 32/164 cut-off events. For 569/569 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 231 event pairs, 15 based on Foata normal form. 2/166 useless extension candidates. Maximal degree in co-relation 537. Up to 62 conditions per place. [2024-10-31 22:19:48,347 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 31 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-10-31 22:19:48,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 57 transitions, 451 flow [2024-10-31 22:19:48,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:19:48,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:19:48,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-10-31 22:19:48,351 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5529715762273901 [2024-10-31 22:19:48,351 INFO L175 Difference]: Start difference. First operand has 81 places, 51 transitions, 366 flow. Second operand 9 states and 214 transitions. [2024-10-31 22:19:48,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 57 transitions, 451 flow [2024-10-31 22:19:48,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 57 transitions, 389 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-10-31 22:19:48,357 INFO L231 Difference]: Finished difference. Result has 81 places, 51 transitions, 323 flow [2024-10-31 22:19:48,358 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=323, PETRI_PLACES=81, PETRI_TRANSITIONS=51} [2024-10-31 22:19:48,359 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-10-31 22:19:48,359 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 51 transitions, 323 flow [2024-10-31 22:19:48,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 22.7) internal successors, (454), 20 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:48,360 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:19:48,360 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:48,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-31 22:19:48,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-31 22:19:48,565 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:19:48,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:48,565 INFO L85 PathProgramCache]: Analyzing trace with hash 721945681, now seen corresponding path program 4 times [2024-10-31 22:19:48,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:48,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932270609] [2024-10-31 22:19:48,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:48,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:48,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:48,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932270609] [2024-10-31 22:19:48,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932270609] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:48,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778932236] [2024-10-31 22:19:48,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 22:19:48,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:48,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:48,974 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:48,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:19:49,086 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 22:19:49,087 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:19:49,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-31 22:19:49,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:49,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-31 22:19:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:49,472 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:49,655 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:49,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778932236] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:49,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:49,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-10-31 22:19:49,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852797137] [2024-10-31 22:19:49,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:49,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-31 22:19:49,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:49,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-31 22:19:49,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-10-31 22:19:50,309 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-10-31 22:19:50,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 51 transitions, 323 flow. Second operand has 23 states, 23 states have (on average 22.695652173913043) internal successors, (522), 23 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:50,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:19:50,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-10-31 22:19:50,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:19:50,729 INFO L124 PetriNetUnfolderBase]: 29/159 cut-off events. [2024-10-31 22:19:50,730 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2024-10-31 22:19:50,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 159 events. 29/159 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 220 event pairs, 12 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 481. Up to 51 conditions per place. [2024-10-31 22:19:50,731 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 31 selfloop transitions, 9 changer transitions 0/58 dead transitions. [2024-10-31 22:19:50,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 58 transitions, 417 flow [2024-10-31 22:19:50,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:19:50,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-31 22:19:50,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-10-31 22:19:50,733 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5511627906976744 [2024-10-31 22:19:50,733 INFO L175 Difference]: Start difference. First operand has 81 places, 51 transitions, 323 flow. Second operand 10 states and 237 transitions. [2024-10-31 22:19:50,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 58 transitions, 417 flow [2024-10-31 22:19:50,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 58 transitions, 397 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-10-31 22:19:50,738 INFO L231 Difference]: Finished difference. Result has 85 places, 51 transitions, 329 flow [2024-10-31 22:19:50,739 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=329, PETRI_PLACES=85, PETRI_TRANSITIONS=51} [2024-10-31 22:19:50,739 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-10-31 22:19:50,739 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 51 transitions, 329 flow [2024-10-31 22:19:50,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 22.695652173913043) internal successors, (522), 23 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:50,740 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:19:50,740 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:50,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-31 22:19:50,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-31 22:19:50,944 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:19:50,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:50,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1089227216, now seen corresponding path program 5 times [2024-10-31 22:19:50,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:50,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792210578] [2024-10-31 22:19:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:50,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:51,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:51,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792210578] [2024-10-31 22:19:51,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792210578] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:51,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889284376] [2024-10-31 22:19:51,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-31 22:19:51,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:51,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:51,417 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:51,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 22:19:51,535 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-10-31 22:19:51,535 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:19:51,537 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 22:19:51,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:51,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-31 22:19:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:51,992 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:52,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889284376] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:52,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:52,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-10-31 22:19:52,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976810951] [2024-10-31 22:19:52,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:52,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-31 22:19:52,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:52,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-31 22:19:52,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-10-31 22:19:53,138 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-10-31 22:19:53,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 51 transitions, 329 flow. Second operand has 26 states, 26 states have (on average 22.615384615384617) internal successors, (588), 26 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:53,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:19:53,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-10-31 22:19:53,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:19:53,615 INFO L124 PetriNetUnfolderBase]: 26/154 cut-off events. [2024-10-31 22:19:53,616 INFO L125 PetriNetUnfolderBase]: For 465/465 co-relation queries the response was YES. [2024-10-31 22:19:53,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 507 conditions, 154 events. 26/154 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 211 event pairs, 9 based on Foata normal form. 2/156 useless extension candidates. Maximal degree in co-relation 465. Up to 40 conditions per place. [2024-10-31 22:19:53,621 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 31 selfloop transitions, 10 changer transitions 0/59 dead transitions. [2024-10-31 22:19:53,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 59 transitions, 428 flow [2024-10-31 22:19:53,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 22:19:53,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-31 22:19:53,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 260 transitions. [2024-10-31 22:19:53,623 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5496828752642706 [2024-10-31 22:19:53,623 INFO L175 Difference]: Start difference. First operand has 85 places, 51 transitions, 329 flow. Second operand 11 states and 260 transitions. [2024-10-31 22:19:53,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 59 transitions, 428 flow [2024-10-31 22:19:53,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 59 transitions, 404 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-10-31 22:19:53,632 INFO L231 Difference]: Finished difference. Result has 89 places, 51 transitions, 334 flow [2024-10-31 22:19:53,632 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=334, PETRI_PLACES=89, PETRI_TRANSITIONS=51} [2024-10-31 22:19:53,633 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-10-31 22:19:53,633 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 51 transitions, 334 flow [2024-10-31 22:19:53,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 22.615384615384617) internal successors, (588), 26 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:53,637 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:19:53,637 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:53,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-31 22:19:53,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-31 22:19:53,838 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:19:53,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:53,838 INFO L85 PathProgramCache]: Analyzing trace with hash -2013160073, now seen corresponding path program 6 times [2024-10-31 22:19:53,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:53,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313280963] [2024-10-31 22:19:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:53,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:19:54,315 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:54,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:19:54,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313280963] [2024-10-31 22:19:54,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313280963] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:19:54,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169082636] [2024-10-31 22:19:54,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-31 22:19:54,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:19:54,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:19:54,318 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:19:54,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-31 22:19:54,458 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-31 22:19:54,458 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:19:54,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-31 22:19:54,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:19:54,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-31 22:19:55,002 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:55,003 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:19:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:19:55,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169082636] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:19:55,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:19:55,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-10-31 22:19:55,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116371655] [2024-10-31 22:19:55,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:19:55,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-31 22:19:55,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:19:55,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-31 22:19:55,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2024-10-31 22:19:56,194 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 43 [2024-10-31 22:19:56,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 51 transitions, 334 flow. Second operand has 29 states, 29 states have (on average 22.551724137931036) internal successors, (654), 29 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:56,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:19:56,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 43 [2024-10-31 22:19:56,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:19:56,783 INFO L124 PetriNetUnfolderBase]: 23/155 cut-off events. [2024-10-31 22:19:56,783 INFO L125 PetriNetUnfolderBase]: For 498/498 co-relation queries the response was YES. [2024-10-31 22:19:56,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509 conditions, 155 events. 23/155 cut-off events. For 498/498 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 186 event pairs, 6 based on Foata normal form. 2/157 useless extension candidates. Maximal degree in co-relation 465. Up to 31 conditions per place. [2024-10-31 22:19:56,784 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 31 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2024-10-31 22:19:56,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 60 transitions, 439 flow [2024-10-31 22:19:56,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-31 22:19:56,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-31 22:19:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 283 transitions. [2024-10-31 22:19:56,786 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5484496124031008 [2024-10-31 22:19:56,786 INFO L175 Difference]: Start difference. First operand has 89 places, 51 transitions, 334 flow. Second operand 12 states and 283 transitions. [2024-10-31 22:19:56,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 60 transitions, 439 flow [2024-10-31 22:19:56,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 60 transitions, 411 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-10-31 22:19:56,793 INFO L231 Difference]: Finished difference. Result has 93 places, 51 transitions, 339 flow [2024-10-31 22:19:56,793 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=339, PETRI_PLACES=93, PETRI_TRANSITIONS=51} [2024-10-31 22:19:56,794 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-10-31 22:19:56,794 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 51 transitions, 339 flow [2024-10-31 22:19:56,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 22.551724137931036) internal successors, (654), 29 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:19:56,795 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:19:56,795 INFO L204 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:19:56,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-31 22:19:56,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a0d7eea-9006-4fd6-ab7a-f4d537120d30/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-31 22:19:56,999 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-31 22:19:56,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:19:57,000 INFO L85 PathProgramCache]: Analyzing trace with hash -828021418, now seen corresponding path program 3 times [2024-10-31 22:19:57,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:19:57,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793154416] [2024-10-31 22:19:57,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:19:57,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:19:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat