./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 7be9b237ca4111a24c77c67cce26f31a788af03984af96dee7353f79c789c2c1 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:44:10,741 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:44:10,823 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:44:10,827 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:44:10,828 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:44:10,846 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:44:10,847 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:44:10,847 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:44:10,847 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:44:10,848 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:44:10,848 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:44:10,848 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:44:10,849 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:44:10,849 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:44:10,850 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:44:10,850 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:44:10,850 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:44:10,851 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:44:10,851 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:44:10,851 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:44:10,852 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:44:10,852 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:44:10,853 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:44:10,853 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:44:10,853 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:44:10,853 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:44:10,854 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:44:10,854 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:44:10,854 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:44:10,855 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:44:10,855 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:44:10,856 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:44:10,856 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:44:10,856 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:44:10,857 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:44:10,857 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:44:10,857 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:44:10,857 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:44:10,858 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:44:10,858 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:44:10,858 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:44:10,859 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:44:10,859 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7be9b237ca4111a24c77c67cce26f31a788af03984af96dee7353f79c789c2c1 [2024-11-09 10:44:11,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:44:11,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:44:11,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:44:11,117 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:44:11,118 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:44:11,119 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2024-11-09 10:44:12,532 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:44:12,557 ERROR L? ?]: Error during toolchain job processing: java.lang.NullPointerException at org.eclipse.cdt.internal.core.model.PathEntry.kindFromString(PathEntry.java:80) at org.eclipse.cdt.internal.core.model.DefaultPathEntryStore.decodePathEntry(DefaultPathEntryStore.java:127) at org.eclipse.cdt.internal.core.model.DefaultPathEntryStore.getRawPathEntries(DefaultPathEntryStore.java:97) at org.eclipse.cdt.internal.core.model.PathEntryStoreProxy.getRawPathEntries(PathEntryStoreProxy.java:102) at org.eclipse.cdt.internal.core.model.PathEntryManager.getRawPathEntries(PathEntryManager.java:666) at org.eclipse.cdt.core.model.CoreModel.getRawPathEntries(CoreModel.java:937) at org.eclipse.cdt.core.model.CoreModel.oldIsScannerInformationEmpty(CoreModel.java:1307) at org.eclipse.cdt.core.model.CoreModel.isScannerInformationEmpty(CoreModel.java:1252) at org.eclipse.cdt.internal.core.pdom.indexer.ProjectIndexerInputAdapter.isFileBuildConfigured(ProjectIndexerInputAdapter.java:267) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.isRequiredInIndex(AbstractIndexerTask.java:748) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.extractFiles(AbstractIndexerTask.java:667) at org.eclipse.cdt.internal.core.pdom.AbstractIndexerTask.runTask(AbstractIndexerTask.java:558) at org.eclipse.cdt.internal.core.pdom.indexer.PDOMIndexerTask.run(PDOMIndexerTask.java:164) at org.eclipse.cdt.internal.core.pdom.PDOMIndexerJob.run(PDOMIndexerJob.java:160) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 10:44:12,843 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:44:12,844 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_87-lists_racefree.i [2024-11-09 10:44:12,869 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/643bb610c/4131fd7ec5cd4ea399c491058114eb99/FLAGb27e257f0 [2024-11-09 10:44:12,886 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/643bb610c/4131fd7ec5cd4ea399c491058114eb99 [2024-11-09 10:44:12,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:44:12,889 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:44:12,891 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:44:12,892 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:44:12,896 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:44:12,896 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:44:12" (1/1) ... [2024-11-09 10:44:12,897 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b3c6782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:12, skipping insertion in model container [2024-11-09 10:44:12,897 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:44:12" (1/1) ... [2024-11-09 10:44:12,974 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:44:13,413 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:44:13,656 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:44:13,715 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:44:13,832 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:44:13,833 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:13 WrapperNode [2024-11-09 10:44:13,833 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:44:13,834 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:44:13,834 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:44:13,834 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:44:13,843 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:13" (1/1) ... [2024-11-09 10:44:13,887 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:13" (1/1) ... [2024-11-09 10:44:14,005 INFO L138 Inliner]: procedures = 280, calls = 1605, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 1788 [2024-11-09 10:44:14,006 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:44:14,007 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:44:14,007 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:44:14,007 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:44:14,019 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:13" (1/1) ... [2024-11-09 10:44:14,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:13" (1/1) ... [2024-11-09 10:44:14,043 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:13" (1/1) ... [2024-11-09 10:44:14,095 INFO L175 MemorySlicer]: Split 1569 memory accesses to 8 slices as follows [2, 2, 2, 5, 259, 5, 1280, 14]. 82 percent of accesses are in the largest equivalence class. The 1548 initializations are split as follows [2, 0, 0, 5, 256, 5, 1280, 0]. The 11 writes are split as follows [0, 1, 1, 0, 1, 0, 0, 8]. [2024-11-09 10:44:14,095 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:13" (1/1) ... [2024-11-09 10:44:14,095 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:13" (1/1) ... [2024-11-09 10:44:14,190 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:13" (1/1) ... [2024-11-09 10:44:14,209 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:13" (1/1) ... [2024-11-09 10:44:14,226 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:13" (1/1) ... [2024-11-09 10:44:14,260 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:13" (1/1) ... [2024-11-09 10:44:14,287 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:44:14,288 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:44:14,289 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:44:14,289 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:44:14,292 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:13" (1/1) ... [2024-11-09 10:44:14,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:44:14,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:44:14,334 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 10:44:14,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 10:44:14,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 10:44:14,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-09 10:44:14,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-09 10:44:14,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-09 10:44:14,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-09 10:44:14,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-11-09 10:44:14,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2024-11-09 10:44:14,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2024-11-09 10:44:14,391 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2024-11-09 10:44:14,393 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2024-11-09 10:44:14,393 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2024-11-09 10:44:14,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 10:44:14,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-09 10:44:14,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-09 10:44:14,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-09 10:44:14,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-11-09 10:44:14,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-11-09 10:44:14,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2024-11-09 10:44:14,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#6 [2024-11-09 10:44:14,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#7 [2024-11-09 10:44:14,394 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-09 10:44:14,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:44:14,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:44:14,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-09 10:44:14,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-09 10:44:14,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-09 10:44:14,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-11-09 10:44:14,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-11-09 10:44:14,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-11-09 10:44:14,395 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2024-11-09 10:44:14,395 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2024-11-09 10:44:14,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:44:14,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:44:14,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-09 10:44:14,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-09 10:44:14,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-09 10:44:14,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-11-09 10:44:14,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-11-09 10:44:14,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-11-09 10:44:14,395 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-09 10:44:14,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:44:14,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:44:14,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-09 10:44:14,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-09 10:44:14,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-09 10:44:14,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-09 10:44:14,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-11-09 10:44:14,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2024-11-09 10:44:14,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2024-11-09 10:44:14,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2024-11-09 10:44:14,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:44:14,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:44:14,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-09 10:44:14,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-09 10:44:14,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-09 10:44:14,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-11-09 10:44:14,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-11-09 10:44:14,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-11-09 10:44:14,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:44:14,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:44:14,403 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:44:14,627 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:44:14,630 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:44:16,640 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:44:16,641 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:44:57,182 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:44:57,182 INFO L316 CfgBuilder]: Removed 16 assume(true) statements. [2024-11-09 10:44:57,183 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:44:57 BoogieIcfgContainer [2024-11-09 10:44:57,183 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:44:57,187 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:44:57,187 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:44:57,193 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:44:57,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:44:12" (1/3) ... [2024-11-09 10:44:57,195 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66fcae77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:44:57, skipping insertion in model container [2024-11-09 10:44:57,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:13" (2/3) ... [2024-11-09 10:44:57,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66fcae77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:44:57, skipping insertion in model container [2024-11-09 10:44:57,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:44:57" (3/3) ... [2024-11-09 10:44:57,197 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_87-lists_racefree.i [2024-11-09 10:44:57,217 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:44:57,217 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2024-11-09 10:44:57,217 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:44:57,373 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-09 10:44:57,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 308 flow [2024-11-09 10:44:57,581 INFO L124 PetriNetUnfolderBase]: 39/286 cut-off events. [2024-11-09 10:44:57,581 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-09 10:44:57,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 286 events. 39/286 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1513 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2024-11-09 10:44:57,587 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 144 transitions, 308 flow [2024-11-09 10:44:57,595 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 144 transitions, 308 flow [2024-11-09 10:44:57,603 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:44:57,611 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;@3272f5b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:44:57,613 INFO L334 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2024-11-09 10:44:57,659 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:44:57,659 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-11-09 10:44:57,660 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:44:57,660 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:57,661 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:44:57,661 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-09 10:44:57,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:57,667 INFO L85 PathProgramCache]: Analyzing trace with hash 3744086, now seen corresponding path program 1 times [2024-11-09 10:44:57,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:57,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281268059] [2024-11-09 10:44:57,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:57,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:58,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:58,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281268059] [2024-11-09 10:44:58,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281268059] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:44:58,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:44:58,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:44:58,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491014745] [2024-11-09 10:44:58,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:44:58,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:44:59,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:59,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:44:59,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:44:59,116 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 144 [2024-11-09 10:44:59,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 144 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:59,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:59,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 144 [2024-11-09 10:44:59,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:00,388 INFO L124 PetriNetUnfolderBase]: 3268/7601 cut-off events. [2024-11-09 10:45:00,388 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-11-09 10:45:00,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12893 conditions, 7601 events. 3268/7601 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 61769 event pairs, 3059 based on Foata normal form. 520/6969 useless extension candidates. Maximal degree in co-relation 11394. Up to 5189 conditions per place. [2024-11-09 10:45:00,448 INFO L140 encePairwiseOnDemand]: 127/144 looper letters, 57 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2024-11-09 10:45:00,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 128 transitions, 394 flow [2024-11-09 10:45:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:45:00,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:45:00,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2024-11-09 10:45:00,463 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6504629629629629 [2024-11-09 10:45:00,464 INFO L175 Difference]: Start difference. First operand has 129 places, 144 transitions, 308 flow. Second operand 3 states and 281 transitions. [2024-11-09 10:45:00,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 128 transitions, 394 flow [2024-11-09 10:45:00,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 128 transitions, 394 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-09 10:45:00,479 INFO L231 Difference]: Finished difference. Result has 128 places, 128 transitions, 280 flow [2024-11-09 10:45:00,481 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=280, PETRI_PLACES=128, PETRI_TRANSITIONS=128} [2024-11-09 10:45:00,486 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, -1 predicate places. [2024-11-09 10:45:00,487 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 128 transitions, 280 flow [2024-11-09 10:45:00,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:00,487 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:00,487 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:45:00,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:45:00,488 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-09 10:45:00,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:00,488 INFO L85 PathProgramCache]: Analyzing trace with hash 3744087, now seen corresponding path program 1 times [2024-11-09 10:45:00,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:00,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814076738] [2024-11-09 10:45:00,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:00,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:45:01,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:01,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814076738] [2024-11-09 10:45:01,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814076738] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:45:01,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:45:01,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:45:01,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354136168] [2024-11-09 10:45:01,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:45:01,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:45:01,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:01,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:45:01,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:45:01,511 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 144 [2024-11-09 10:45:01,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 128 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:01,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:01,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 144 [2024-11-09 10:45:01,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:02,546 INFO L124 PetriNetUnfolderBase]: 3268/7599 cut-off events. [2024-11-09 10:45:02,547 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2024-11-09 10:45:02,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12893 conditions, 7599 events. 3268/7599 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 61771 event pairs, 3059 based on Foata normal form. 2/6450 useless extension candidates. Maximal degree in co-relation 12877. Up to 5189 conditions per place. [2024-11-09 10:45:02,602 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 56 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2024-11-09 10:45:02,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 126 transitions, 392 flow [2024-11-09 10:45:02,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:45:02,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:45:02,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2024-11-09 10:45:02,605 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-09 10:45:02,605 INFO L175 Difference]: Start difference. First operand has 128 places, 128 transitions, 280 flow. Second operand 3 states and 270 transitions. [2024-11-09 10:45:02,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 126 transitions, 392 flow [2024-11-09 10:45:02,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 126 transitions, 388 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:45:02,609 INFO L231 Difference]: Finished difference. Result has 126 places, 126 transitions, 276 flow [2024-11-09 10:45:02,609 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=126, PETRI_TRANSITIONS=126} [2024-11-09 10:45:02,610 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, -3 predicate places. [2024-11-09 10:45:02,610 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 126 transitions, 276 flow [2024-11-09 10:45:02,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:02,611 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:02,611 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-09 10:45:02,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:45:02,611 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-09 10:45:02,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:02,612 INFO L85 PathProgramCache]: Analyzing trace with hash 116071513, now seen corresponding path program 1 times [2024-11-09 10:45:02,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:02,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485329445] [2024-11-09 10:45:02,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:02,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:45:02,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:02,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485329445] [2024-11-09 10:45:02,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485329445] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:45:02,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:45:02,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:45:02,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337184667] [2024-11-09 10:45:02,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:45:02,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:45:02,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:02,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:45:02,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:45:02,963 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2024-11-09 10:45:02,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 126 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:02,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:02,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2024-11-09 10:45:02,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:04,045 INFO L124 PetriNetUnfolderBase]: 3268/7605 cut-off events. [2024-11-09 10:45:04,045 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2024-11-09 10:45:04,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12904 conditions, 7605 events. 3268/7605 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 61741 event pairs, 3059 based on Foata normal form. 1/6454 useless extension candidates. Maximal degree in co-relation 12879. Up to 5190 conditions per place. [2024-11-09 10:45:04,092 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 59 selfloop transitions, 2 changer transitions 0/129 dead transitions. [2024-11-09 10:45:04,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 129 transitions, 408 flow [2024-11-09 10:45:04,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:45:04,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:45:04,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2024-11-09 10:45:04,095 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6435185185185185 [2024-11-09 10:45:04,095 INFO L175 Difference]: Start difference. First operand has 126 places, 126 transitions, 276 flow. Second operand 3 states and 278 transitions. [2024-11-09 10:45:04,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 129 transitions, 408 flow [2024-11-09 10:45:04,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 129 transitions, 400 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:45:04,104 INFO L231 Difference]: Finished difference. Result has 127 places, 127 transitions, 284 flow [2024-11-09 10:45:04,105 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=127, PETRI_TRANSITIONS=127} [2024-11-09 10:45:04,105 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, -2 predicate places. [2024-11-09 10:45:04,106 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 127 transitions, 284 flow [2024-11-09 10:45:04,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:04,106 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:04,106 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-09 10:45:04,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 10:45:04,107 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-09 10:45:04,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:04,107 INFO L85 PathProgramCache]: Analyzing trace with hash -696781296, now seen corresponding path program 1 times [2024-11-09 10:45:04,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:04,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028965524] [2024-11-09 10:45:04,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:04,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:04,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:45:04,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:04,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028965524] [2024-11-09 10:45:04,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028965524] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:45:04,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:45:04,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:45:04,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033117330] [2024-11-09 10:45:04,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:45:04,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:45:04,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:04,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:45:04,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:45:04,850 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-11-09 10:45:04,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 127 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:04,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:04,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-11-09 10:45:04,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:06,159 INFO L124 PetriNetUnfolderBase]: 4054/9521 cut-off events. [2024-11-09 10:45:06,160 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-11-09 10:45:06,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16278 conditions, 9521 events. 4054/9521 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 83218 event pairs, 2177 based on Foata normal form. 2/8050 useless extension candidates. Maximal degree in co-relation 16258. Up to 3712 conditions per place. [2024-11-09 10:45:06,221 INFO L140 encePairwiseOnDemand]: 137/144 looper letters, 131 selfloop transitions, 4 changer transitions 0/199 dead transitions. [2024-11-09 10:45:06,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 199 transitions, 698 flow [2024-11-09 10:45:06,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:45:06,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:45:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 411 transitions. [2024-11-09 10:45:06,223 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7135416666666666 [2024-11-09 10:45:06,223 INFO L175 Difference]: Start difference. First operand has 127 places, 127 transitions, 284 flow. Second operand 4 states and 411 transitions. [2024-11-09 10:45:06,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 199 transitions, 698 flow [2024-11-09 10:45:06,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 199 transitions, 696 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:45:06,229 INFO L231 Difference]: Finished difference. Result has 131 places, 128 transitions, 312 flow [2024-11-09 10:45:06,230 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=131, PETRI_TRANSITIONS=128} [2024-11-09 10:45:06,232 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 2 predicate places. [2024-11-09 10:45:06,232 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 128 transitions, 312 flow [2024-11-09 10:45:06,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:06,233 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:06,233 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-09 10:45:06,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 10:45:06,233 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-09 10:45:06,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:06,235 INFO L85 PathProgramCache]: Analyzing trace with hash -696781295, now seen corresponding path program 1 times [2024-11-09 10:45:06,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:06,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265241791] [2024-11-09 10:45:06,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:06,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:45:07,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:07,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265241791] [2024-11-09 10:45:07,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265241791] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:45:07,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:45:07,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:45:07,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608639335] [2024-11-09 10:45:07,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:45:07,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:45:07,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:07,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:45:07,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:45:07,294 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-11-09 10:45:07,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 128 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:07,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:07,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-11-09 10:45:07,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:08,238 INFO L124 PetriNetUnfolderBase]: 4084/9782 cut-off events. [2024-11-09 10:45:08,239 INFO L125 PetriNetUnfolderBase]: For 1601/1601 co-relation queries the response was YES. [2024-11-09 10:45:08,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17674 conditions, 9782 events. 4084/9782 cut-off events. For 1601/1601 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 85510 event pairs, 3767 based on Foata normal form. 1/8405 useless extension candidates. Maximal degree in co-relation 17640. Up to 6645 conditions per place. [2024-11-09 10:45:08,326 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 64 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2024-11-09 10:45:08,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 130 transitions, 448 flow [2024-11-09 10:45:08,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:45:08,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:45:08,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2024-11-09 10:45:08,328 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6226851851851852 [2024-11-09 10:45:08,328 INFO L175 Difference]: Start difference. First operand has 131 places, 128 transitions, 312 flow. Second operand 3 states and 269 transitions. [2024-11-09 10:45:08,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 130 transitions, 448 flow [2024-11-09 10:45:08,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 130 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:45:08,337 INFO L231 Difference]: Finished difference. Result has 133 places, 128 transitions, 318 flow [2024-11-09 10:45:08,337 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=133, PETRI_TRANSITIONS=128} [2024-11-09 10:45:08,339 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 4 predicate places. [2024-11-09 10:45:08,339 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 128 transitions, 318 flow [2024-11-09 10:45:08,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:08,340 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:08,340 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:45:08,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:45:08,341 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-09 10:45:08,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:08,341 INFO L85 PathProgramCache]: Analyzing trace with hash -230888125, now seen corresponding path program 1 times [2024-11-09 10:45:08,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:08,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478340557] [2024-11-09 10:45:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:08,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:45:08,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:08,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478340557] [2024-11-09 10:45:08,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478340557] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:08,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099059812] [2024-11-09 10:45:08,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:08,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:08,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:08,689 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:45:08,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:45:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:09,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 3752 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 10:45:09,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:45:09,412 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:45:09,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099059812] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:09,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:09,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-09 10:45:09,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828126848] [2024-11-09 10:45:09,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:09,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 10:45:09,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:09,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 10:45:09,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-09 10:45:09,441 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2024-11-09 10:45:09,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 128 transitions, 318 flow. Second operand has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:09,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:09,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2024-11-09 10:45:09,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:10,511 INFO L124 PetriNetUnfolderBase]: 3973/9561 cut-off events. [2024-11-09 10:45:10,512 INFO L125 PetriNetUnfolderBase]: For 934/995 co-relation queries the response was YES. [2024-11-09 10:45:10,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17134 conditions, 9561 events. 3973/9561 cut-off events. For 934/995 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 83310 event pairs, 3660 based on Foata normal form. 3/8200 useless extension candidates. Maximal degree in co-relation 17109. Up to 6451 conditions per place. [2024-11-09 10:45:10,598 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 64 selfloop transitions, 6 changer transitions 0/137 dead transitions. [2024-11-09 10:45:10,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 137 transitions, 480 flow [2024-11-09 10:45:10,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:45:10,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:45:10,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 503 transitions. [2024-11-09 10:45:10,600 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5821759259259259 [2024-11-09 10:45:10,600 INFO L175 Difference]: Start difference. First operand has 133 places, 128 transitions, 318 flow. Second operand 6 states and 503 transitions. [2024-11-09 10:45:10,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 137 transitions, 480 flow [2024-11-09 10:45:10,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 137 transitions, 476 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:45:10,606 INFO L231 Difference]: Finished difference. Result has 140 places, 131 transitions, 354 flow [2024-11-09 10:45:10,607 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=140, PETRI_TRANSITIONS=131} [2024-11-09 10:45:10,607 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 11 predicate places. [2024-11-09 10:45:10,608 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 131 transitions, 354 flow [2024-11-09 10:45:10,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:10,608 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:10,608 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1] [2024-11-09 10:45:10,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 10:45:10,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 10:45:10,809 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-09 10:45:10,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:10,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1432371815, now seen corresponding path program 1 times [2024-11-09 10:45:10,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:10,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336129405] [2024-11-09 10:45:10,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:10,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:45:12,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:12,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336129405] [2024-11-09 10:45:12,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336129405] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:12,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985130191] [2024-11-09 10:45:12,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:12,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:12,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:12,048 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:45:12,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:45:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:12,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 3789 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 10:45:12,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:12,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:45:12,716 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 [2024-11-09 10:45:12,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:45:12,821 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 [2024-11-09 10:45:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:45:12,867 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:13,040 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:45:13,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-09 10:45:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:45:13,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985130191] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:13,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:13,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-09 10:45:13,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850537510] [2024-11-09 10:45:13,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:13,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:45:13,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:13,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:45:13,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:45:14,648 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-11-09 10:45:14,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 131 transitions, 354 flow. Second operand has 14 states, 14 states have (on average 69.5) internal successors, (973), 14 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:14,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:14,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-11-09 10:45:14,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:15,798 INFO L124 PetriNetUnfolderBase]: 4084/9794 cut-off events. [2024-11-09 10:45:15,798 INFO L125 PetriNetUnfolderBase]: For 1091/1091 co-relation queries the response was YES. [2024-11-09 10:45:15,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17724 conditions, 9794 events. 4084/9794 cut-off events. For 1091/1091 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 85467 event pairs, 3767 based on Foata normal form. 3/8419 useless extension candidates. Maximal degree in co-relation 17691. Up to 6645 conditions per place. [2024-11-09 10:45:15,864 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 70 selfloop transitions, 5 changer transitions 0/139 dead transitions. [2024-11-09 10:45:15,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 139 transitions, 532 flow [2024-11-09 10:45:15,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:45:15,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:45:15,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 484 transitions. [2024-11-09 10:45:15,866 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5601851851851852 [2024-11-09 10:45:15,866 INFO L175 Difference]: Start difference. First operand has 140 places, 131 transitions, 354 flow. Second operand 6 states and 484 transitions. [2024-11-09 10:45:15,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 139 transitions, 532 flow [2024-11-09 10:45:15,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 139 transitions, 522 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-09 10:45:15,872 INFO L231 Difference]: Finished difference. Result has 147 places, 132 transitions, 376 flow [2024-11-09 10:45:15,873 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=376, PETRI_PLACES=147, PETRI_TRANSITIONS=132} [2024-11-09 10:45:15,873 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 18 predicate places. [2024-11-09 10:45:15,873 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 132 transitions, 376 flow [2024-11-09 10:45:15,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 69.5) internal successors, (973), 14 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:15,874 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:15,875 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2024-11-09 10:45:15,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 10:45:16,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 10:45:16,075 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-09 10:45:16,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:16,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1794458113, now seen corresponding path program 2 times [2024-11-09 10:45:16,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:16,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876843869] [2024-11-09 10:45:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:16,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:16,536 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 10:45:16,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:16,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876843869] [2024-11-09 10:45:16,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876843869] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:45:16,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:45:16,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:45:16,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987668215] [2024-11-09 10:45:16,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:45:16,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:45:16,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:16,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:45:16,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:45:16,592 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2024-11-09 10:45:16,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 132 transitions, 376 flow. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:16,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:16,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2024-11-09 10:45:16,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:17,440 INFO L124 PetriNetUnfolderBase]: 4432/10459 cut-off events. [2024-11-09 10:45:17,441 INFO L125 PetriNetUnfolderBase]: For 906/906 co-relation queries the response was YES. [2024-11-09 10:45:17,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18924 conditions, 10459 events. 4432/10459 cut-off events. For 906/906 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 93572 event pairs, 2895 based on Foata normal form. 0/8968 useless extension candidates. Maximal degree in co-relation 18884. Up to 4460 conditions per place. [2024-11-09 10:45:17,508 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 101 selfloop transitions, 2 changer transitions 0/166 dead transitions. [2024-11-09 10:45:17,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 166 transitions, 654 flow [2024-11-09 10:45:17,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:45:17,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:45:17,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2024-11-09 10:45:17,510 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6990740740740741 [2024-11-09 10:45:17,510 INFO L175 Difference]: Start difference. First operand has 147 places, 132 transitions, 376 flow. Second operand 3 states and 302 transitions. [2024-11-09 10:45:17,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 166 transitions, 654 flow [2024-11-09 10:45:17,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 166 transitions, 646 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:45:17,517 INFO L231 Difference]: Finished difference. Result has 143 places, 130 transitions, 368 flow [2024-11-09 10:45:17,517 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=368, PETRI_PLACES=143, PETRI_TRANSITIONS=130} [2024-11-09 10:45:17,518 INFO L277 CegarLoopForPetriNet]: 129 programPoint places, 14 predicate places. [2024-11-09 10:45:17,518 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 130 transitions, 368 flow [2024-11-09 10:45:17,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:17,519 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:17,519 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2024-11-09 10:45:17,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 10:45:17,519 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2024-11-09 10:45:17,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:17,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1794458114, now seen corresponding path program 1 times [2024-11-09 10:45:17,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:17,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106637508] [2024-11-09 10:45:17,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:17,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:45:18,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:18,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106637508] [2024-11-09 10:45:18,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106637508] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:18,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105381174] [2024-11-09 10:45:18,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:18,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:18,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:18,024 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:45:18,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:45:18,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:18,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 3977 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 10:45:18,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:45:18,742 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:45:18,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105381174] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:18,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:18,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-09 10:45:18,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995636763] [2024-11-09 10:45:18,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:18,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:45:18,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:18,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:45:18,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:45:18,813 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2024-11-09 10:45:18,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 130 transitions, 368 flow. Second operand has 13 states, 13 states have (on average 74.53846153846153) internal successors, (969), 13 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:18,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:18,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2024-11-09 10:45:18,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand