./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-ticket-6.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2737e033-2957-4dc3-9a43-4d4a6b7f30a7/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2737e033-2957-4dc3-9a43-4d4a6b7f30a7/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2737e033-2957-4dc3-9a43-4d4a6b7f30a7/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2737e033-2957-4dc3-9a43-4d4a6b7f30a7/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-ticket-6.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2737e033-2957-4dc3-9a43-4d4a6b7f30a7/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2737e033-2957-4dc3-9a43-4d4a6b7f30a7/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 c7095f70ba7104a12a93da2a0b557c5b5c6880d23caa33c7c2fd19334f4cb537 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:04:33,397 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:04:33,507 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2737e033-2957-4dc3-9a43-4d4a6b7f30a7/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:04:33,515 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:04:33,516 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:04:33,559 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:04:33,562 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:04:33,562 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:04:33,563 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:04:33,568 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:04:33,569 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:04:33,570 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:04:33,570 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:04:33,572 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:04:33,572 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:04:33,573 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:04:33,573 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:04:33,574 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:04:33,574 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:04:33,575 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:04:33,575 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:04:33,576 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:04:33,576 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:04:33,578 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:04:33,579 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:04:33,579 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:04:33,580 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:04:33,581 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:04:33,581 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:04:33,582 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:04:33,583 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:04:33,583 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:04:33,584 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:04:33,584 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:04:33,584 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:04:33,585 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:04:33,585 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:04:33,585 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:04:33,586 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_2737e033-2957-4dc3-9a43-4d4a6b7f30a7/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2737e033-2957-4dc3-9a43-4d4a6b7f30a7/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7095f70ba7104a12a93da2a0b557c5b5c6880d23caa33c7c2fd19334f4cb537 [2023-11-06 22:04:33,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:04:33,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:04:33,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:04:33,962 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:04:33,962 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:04:33,963 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2737e033-2957-4dc3-9a43-4d4a6b7f30a7/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/parallel-ticket-6.wvr.c [2023-11-06 22:04:37,133 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:04:37,334 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:04:37,335 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2737e033-2957-4dc3-9a43-4d4a6b7f30a7/sv-benchmarks/c/weaver/parallel-ticket-6.wvr.c [2023-11-06 22:04:37,344 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2737e033-2957-4dc3-9a43-4d4a6b7f30a7/bin/uautomizer-verify-WvqO1wxjHP/data/cbab0ac97/eaa7ce764fa346d19e3765a40d5d84f7/FLAG5498148ff [2023-11-06 22:04:37,361 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2737e033-2957-4dc3-9a43-4d4a6b7f30a7/bin/uautomizer-verify-WvqO1wxjHP/data/cbab0ac97/eaa7ce764fa346d19e3765a40d5d84f7 [2023-11-06 22:04:37,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:04:37,370 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:04:37,372 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:04:37,372 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:04:37,377 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:04:37,378 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:04:37" (1/1) ... [2023-11-06 22:04:37,379 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b3e64b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:37, skipping insertion in model container [2023-11-06 22:04:37,379 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:04:37" (1/1) ... [2023-11-06 22:04:37,430 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:04:37,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:04:37,635 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:04:37,672 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:04:37,681 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:04:37,682 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 22:04:37,690 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:04:37,690 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:37 WrapperNode [2023-11-06 22:04:37,691 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:04:37,692 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:04:37,692 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:04:37,692 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:04:37,700 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:37" (1/1) ... [2023-11-06 22:04:37,710 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:37" (1/1) ... [2023-11-06 22:04:37,747 INFO L138 Inliner]: procedures = 25, calls = 101, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 289 [2023-11-06 22:04:37,748 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:04:37,749 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:04:37,749 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:04:37,749 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:04:37,760 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:37" (1/1) ... [2023-11-06 22:04:37,760 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:37" (1/1) ... [2023-11-06 22:04:37,765 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:37" (1/1) ... [2023-11-06 22:04:37,766 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:37" (1/1) ... [2023-11-06 22:04:37,776 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:37" (1/1) ... [2023-11-06 22:04:37,778 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:37" (1/1) ... [2023-11-06 22:04:37,781 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:37" (1/1) ... [2023-11-06 22:04:37,783 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:37" (1/1) ... [2023-11-06 22:04:37,788 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:04:37,789 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:04:37,789 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:04:37,789 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:04:37,790 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:37" (1/1) ... [2023-11-06 22:04:37,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:04:37,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2737e033-2957-4dc3-9a43-4d4a6b7f30a7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:04:37,833 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2737e033-2957-4dc3-9a43-4d4a6b7f30a7/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:04:37,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2737e033-2957-4dc3-9a43-4d4a6b7f30a7/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:04:37,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:04:37,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:04:37,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:04:37,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:04:37,883 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:04:37,883 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:04:37,883 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:04:37,883 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:04:37,883 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 22:04:37,883 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 22:04:37,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-06 22:04:37,884 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-06 22:04:37,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:04:37,884 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-11-06 22:04:37,885 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-11-06 22:04:37,887 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-11-06 22:04:37,887 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-11-06 22:04:37,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 22:04:37,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 22:04:37,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:04:37,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:04:37,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:04:37,890 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:04:38,055 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:04:38,058 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:04:38,643 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:04:38,785 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:04:38,786 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-06 22:04:38,790 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:04:38 BoogieIcfgContainer [2023-11-06 22:04:38,790 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:04:38,794 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:04:38,795 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:04:38,799 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:04:38,800 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:04:37" (1/3) ... [2023-11-06 22:04:38,801 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b54a1cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:04:38, skipping insertion in model container [2023-11-06 22:04:38,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:04:37" (2/3) ... [2023-11-06 22:04:38,802 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b54a1cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:04:38, skipping insertion in model container [2023-11-06 22:04:38,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:04:38" (3/3) ... [2023-11-06 22:04:38,825 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-ticket-6.wvr.c [2023-11-06 22:04:38,846 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:04:38,846 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-06 22:04:38,847 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:04:38,940 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-11-06 22:04:38,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 225 transitions, 492 flow [2023-11-06 22:04:39,135 INFO L124 PetriNetUnfolderBase]: 2/219 cut-off events. [2023-11-06 22:04:39,135 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:04:39,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 219 events. 2/219 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 162 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 158. Up to 2 conditions per place. [2023-11-06 22:04:39,142 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 225 transitions, 492 flow [2023-11-06 22:04:39,157 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 231 places, 214 transitions, 464 flow [2023-11-06 22:04:39,161 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:04:39,180 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 231 places, 214 transitions, 464 flow [2023-11-06 22:04:39,185 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 231 places, 214 transitions, 464 flow [2023-11-06 22:04:39,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 214 transitions, 464 flow [2023-11-06 22:04:39,269 INFO L124 PetriNetUnfolderBase]: 2/214 cut-off events. [2023-11-06 22:04:39,270 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-06 22:04:39,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 214 events. 2/214 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 161 event pairs, 0 based on Foata normal form. 0/187 useless extension candidates. Maximal degree in co-relation 158. Up to 2 conditions per place. [2023-11-06 22:04:39,277 INFO L119 LiptonReduction]: Number of co-enabled transitions 3930 [2023-11-06 22:04:51,851 INFO L134 LiptonReduction]: Checked pairs total: 24617 [2023-11-06 22:04:51,853 INFO L136 LiptonReduction]: Total number of compositions: 184 [2023-11-06 22:04:51,872 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:04:51,884 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@5d35e931, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:04:51,884 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2023-11-06 22:04:51,887 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:04:51,887 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-06 22:04:51,887 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:04:51,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:04:51,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-06 22:04:51,889 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:04:51,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:04:51,895 INFO L85 PathProgramCache]: Analyzing trace with hash 886, now seen corresponding path program 1 times [2023-11-06 22:04:51,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:04:51,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720414353] [2023-11-06 22:04:51,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:04:51,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:04:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:04:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:04:52,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:04:52,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720414353] [2023-11-06 22:04:52,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720414353] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:04:52,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:04:52,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-06 22:04:52,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811815644] [2023-11-06 22:04:52,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:04:52,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:04:52,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:04:52,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:04:52,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:04:52,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 409 [2023-11-06 22:04:52,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 75 transitions, 186 flow. Second operand has 2 states, 2 states have (on average 192.5) internal successors, (385), 2 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:04:52,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:04:52,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 409 [2023-11-06 22:04:52,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:05:06,661 INFO L124 PetriNetUnfolderBase]: 107865/140634 cut-off events. [2023-11-06 22:05:06,661 INFO L125 PetriNetUnfolderBase]: For 3588/3588 co-relation queries the response was YES. [2023-11-06 22:05:07,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279901 conditions, 140634 events. 107865/140634 cut-off events. For 3588/3588 co-relation queries the response was YES. Maximal size of possible extension queue 5163. Compared 889097 event pairs, 107865 based on Foata normal form. 0/126625 useless extension candidates. Maximal degree in co-relation 229374. Up to 135165 conditions per place. [2023-11-06 22:05:07,914 INFO L140 encePairwiseOnDemand]: 406/409 looper letters, 65 selfloop transitions, 0 changer transitions 0/72 dead transitions. [2023-11-06 22:05:07,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 72 transitions, 310 flow [2023-11-06 22:05:07,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:05:07,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:05:07,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 452 transitions. [2023-11-06 22:05:07,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525672371638142 [2023-11-06 22:05:07,943 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 452 transitions. [2023-11-06 22:05:07,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 452 transitions. [2023-11-06 22:05:07,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:05:07,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 452 transitions. [2023-11-06 22:05:07,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 226.0) internal successors, (452), 2 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:07,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 409.0) internal successors, (1227), 3 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:07,971 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 409.0) internal successors, (1227), 3 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:07,973 INFO L175 Difference]: Start difference. First operand has 94 places, 75 transitions, 186 flow. Second operand 2 states and 452 transitions. [2023-11-06 22:05:07,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 72 transitions, 310 flow [2023-11-06 22:05:08,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 72 transitions, 286 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-11-06 22:05:08,582 INFO L231 Difference]: Finished difference. Result has 80 places, 72 transitions, 156 flow [2023-11-06 22:05:08,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=156, PETRI_PLACES=80, PETRI_TRANSITIONS=72} [2023-11-06 22:05:08,588 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -14 predicate places. [2023-11-06 22:05:08,590 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 72 transitions, 156 flow [2023-11-06 22:05:08,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 192.5) internal successors, (385), 2 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:08,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:05:08,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:05:08,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:05:08,592 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:05:08,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:08,593 INFO L85 PathProgramCache]: Analyzing trace with hash 871609, now seen corresponding path program 1 times [2023-11-06 22:05:08,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:08,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807386402] [2023-11-06 22:05:08,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:08,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:09,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:09,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807386402] [2023-11-06 22:05:09,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807386402] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:05:09,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:05:09,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:05:09,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375266924] [2023-11-06 22:05:09,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:09,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:05:09,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:09,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:05:09,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:05:09,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 409 [2023-11-06 22:05:09,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 72 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:09,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:05:09,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 409 [2023-11-06 22:05:09,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:05:19,559 INFO L124 PetriNetUnfolderBase]: 104022/135761 cut-off events. [2023-11-06 22:05:19,560 INFO L125 PetriNetUnfolderBase]: For 768/768 co-relation queries the response was YES. [2023-11-06 22:05:19,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267422 conditions, 135761 events. 104022/135761 cut-off events. For 768/768 co-relation queries the response was YES. Maximal size of possible extension queue 5105. Compared 858531 event pairs, 104022 based on Foata normal form. 0/122780 useless extension candidates. Maximal degree in co-relation 267419. Up to 130293 conditions per place. [2023-11-06 22:05:20,419 INFO L140 encePairwiseOnDemand]: 406/409 looper letters, 62 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2023-11-06 22:05:20,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 70 transitions, 278 flow [2023-11-06 22:05:20,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:05:20,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:05:20,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 623 transitions. [2023-11-06 22:05:20,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5077424612876935 [2023-11-06 22:05:20,424 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 623 transitions. [2023-11-06 22:05:20,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 623 transitions. [2023-11-06 22:05:20,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:05:20,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 623 transitions. [2023-11-06 22:05:20,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:20,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:20,438 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:20,440 INFO L175 Difference]: Start difference. First operand has 80 places, 72 transitions, 156 flow. Second operand 3 states and 623 transitions. [2023-11-06 22:05:20,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 70 transitions, 278 flow [2023-11-06 22:05:20,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 70 transitions, 278 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:05:20,453 INFO L231 Difference]: Finished difference. Result has 80 places, 70 transitions, 154 flow [2023-11-06 22:05:20,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=80, PETRI_TRANSITIONS=70} [2023-11-06 22:05:20,454 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -14 predicate places. [2023-11-06 22:05:20,454 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 70 transitions, 154 flow [2023-11-06 22:05:20,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:20,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:05:20,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-06 22:05:20,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:05:20,456 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:05:20,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:20,461 INFO L85 PathProgramCache]: Analyzing trace with hash 871611, now seen corresponding path program 1 times [2023-11-06 22:05:20,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:20,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083205980] [2023-11-06 22:05:20,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:20,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:20,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:20,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083205980] [2023-11-06 22:05:20,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083205980] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:05:20,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:05:20,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:05:20,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940297600] [2023-11-06 22:05:20,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:20,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:05:20,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:20,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:05:20,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:05:20,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 409 [2023-11-06 22:05:20,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 70 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:20,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:05:20,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 409 [2023-11-06 22:05:20,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:05:30,546 INFO L124 PetriNetUnfolderBase]: 100179/130888 cut-off events. [2023-11-06 22:05:30,546 INFO L125 PetriNetUnfolderBase]: For 768/768 co-relation queries the response was YES. [2023-11-06 22:05:30,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257680 conditions, 130888 events. 100179/130888 cut-off events. For 768/768 co-relation queries the response was YES. Maximal size of possible extension queue 5070. Compared 828429 event pairs, 100179 based on Foata normal form. 0/118935 useless extension candidates. Maximal degree in co-relation 257676. Up to 125422 conditions per place. [2023-11-06 22:05:31,248 INFO L140 encePairwiseOnDemand]: 406/409 looper letters, 60 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2023-11-06 22:05:31,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 68 transitions, 272 flow [2023-11-06 22:05:31,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:05:31,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:05:31,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-11-06 22:05:31,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48655256723716384 [2023-11-06 22:05:31,252 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-11-06 22:05:31,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-11-06 22:05:31,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:05:31,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-11-06 22:05:31,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:31,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:31,260 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 409.0) internal successors, (1636), 4 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:31,261 INFO L175 Difference]: Start difference. First operand has 80 places, 70 transitions, 154 flow. Second operand 3 states and 597 transitions. [2023-11-06 22:05:31,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 68 transitions, 272 flow [2023-11-06 22:05:31,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 68 transitions, 271 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 22:05:31,264 INFO L231 Difference]: Finished difference. Result has 79 places, 68 transitions, 151 flow [2023-11-06 22:05:31,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=409, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=79, PETRI_TRANSITIONS=68} [2023-11-06 22:05:31,265 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, -15 predicate places. [2023-11-06 22:05:31,265 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 68 transitions, 151 flow [2023-11-06 22:05:31,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:31,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:05:31,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:05:31,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:05:31,267 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-11-06 22:05:31,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:05:31,268 INFO L85 PathProgramCache]: Analyzing trace with hash 837638517, now seen corresponding path program 1 times [2023-11-06 22:05:31,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:05:31,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044319265] [2023-11-06 22:05:31,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:05:31,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:05:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:05:31,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:05:31,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:05:31,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044319265] [2023-11-06 22:05:31,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044319265] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:05:31,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:05:31,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:05:31,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425303278] [2023-11-06 22:05:31,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:05:31,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:05:31,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:05:31,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:05:31,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:05:31,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 409 [2023-11-06 22:05:31,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 68 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:05:31,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:05:31,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 409 [2023-11-06 22:05:31,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand