./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.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 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:06:54,868 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:06:54,929 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 19:06:54,934 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:06:54,936 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:06:54,959 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:06:54,960 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:06:54,960 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:06:54,960 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:06:54,961 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:06:54,961 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:06:54,961 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:06:54,961 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:06:54,962 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:06:54,962 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:06:54,963 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:06:54,964 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:06:54,967 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:06:54,967 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:06:54,967 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:06:54,967 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:06:54,968 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:06:54,968 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:06:54,968 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:06:54,968 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:06:54,969 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:06:54,969 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:06:54,969 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:06:54,969 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:06:54,969 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:06:54,969 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:06:54,969 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:06:54,970 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:06:54,970 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:06:54,970 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:06:54,970 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:06:54,971 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 19:06:54,971 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 19:06:54,971 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:06:54,971 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:06:54,971 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:06:54,972 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:06:54,972 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f [2024-10-24 19:06:55,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:06:55,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:06:55,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:06:55,175 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:06:55,176 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:06:55,176 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2024-10-24 19:06:56,380 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:06:56,668 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:06:56,668 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2024-10-24 19:06:56,685 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9acea892/78f80fafb7984449a734a8d51311d370/FLAG9555485f6 [2024-10-24 19:06:56,699 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9acea892/78f80fafb7984449a734a8d51311d370 [2024-10-24 19:06:56,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:06:56,702 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:06:56,703 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:06:56,703 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:06:56,707 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:06:56,708 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:06:56" (1/1) ... [2024-10-24 19:06:56,709 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33feba32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:06:56, skipping insertion in model container [2024-10-24 19:06:56,710 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:06:56" (1/1) ... [2024-10-24 19:06:56,755 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:06:57,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:06:57,197 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 19:06:57,289 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:06:57,405 INFO L204 MainTranslator]: Completed translation [2024-10-24 19:06:57,415 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:06:57 WrapperNode [2024-10-24 19:06:57,416 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:06:57,416 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 19:06:57,420 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 19:06:57,420 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 19:06:57,430 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:06:57" (1/1) ... [2024-10-24 19:06:57,453 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:06:57" (1/1) ... [2024-10-24 19:06:57,517 INFO L138 Inliner]: procedures = 490, calls = 133, calls flagged for inlining = 48, calls inlined = 122, statements flattened = 1866 [2024-10-24 19:06:57,517 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 19:06:57,518 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 19:06:57,518 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 19:06:57,518 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 19:06:57,526 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:06:57" (1/1) ... [2024-10-24 19:06:57,526 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:06:57" (1/1) ... [2024-10-24 19:06:57,538 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:06:57" (1/1) ... [2024-10-24 19:06:57,573 INFO L175 MemorySlicer]: Split 287 memory accesses to 9 slices as follows [2, 4, 8, 171, 80, 2, 12, 2, 6]. 60 percent of accesses are in the largest equivalence class. The 28 initializations are split as follows [2, 0, 2, 0, 20, 0, 4, 0, 0]. The 97 writes are split as follows [0, 2, 2, 63, 20, 1, 4, 1, 4]. [2024-10-24 19:06:57,573 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:06:57" (1/1) ... [2024-10-24 19:06:57,573 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:06:57" (1/1) ... [2024-10-24 19:06:57,624 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:06:57" (1/1) ... [2024-10-24 19:06:57,634 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:06:57" (1/1) ... [2024-10-24 19:06:57,641 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:06:57" (1/1) ... [2024-10-24 19:06:57,646 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:06:57" (1/1) ... [2024-10-24 19:06:57,659 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 19:06:57,659 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 19:06:57,660 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 19:06:57,660 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 19:06:57,660 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:06:57" (1/1) ... [2024-10-24 19:06:57,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:06:57,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:06:57,691 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) [2024-10-24 19:06:57,693 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 [2024-10-24 19:06:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2024-10-24 19:06:57,730 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2024-10-24 19:06:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-24 19:06:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-24 19:06:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-24 19:06:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 19:06:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 19:06:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 19:06:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-24 19:06:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-24 19:06:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-24 19:06:57,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-10-24 19:06:57,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-10-24 19:06:57,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-10-24 19:06:57,732 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-24 19:06:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 19:06:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-24 19:06:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-24 19:06:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-24 19:06:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-10-24 19:06:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-10-24 19:06:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2024-10-24 19:06:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2024-10-24 19:06:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2024-10-24 19:06:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#8 [2024-10-24 19:06:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 19:06:57,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 19:06:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-24 19:06:57,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-24 19:06:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-24 19:06:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-24 19:06:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-10-24 19:06:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-10-24 19:06:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2024-10-24 19:06:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2024-10-24 19:06:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2024-10-24 19:06:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#8 [2024-10-24 19:06:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-24 19:06:57,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 19:06:57,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 19:06:57,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-24 19:06:57,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-24 19:06:57,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-24 19:06:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-24 19:06:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-10-24 19:06:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-10-24 19:06:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-10-24 19:06:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 19:06:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 19:06:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-24 19:06:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-24 19:06:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-24 19:06:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-24 19:06:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-10-24 19:06:57,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-10-24 19:06:57,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-10-24 19:06:57,739 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 19:06:58,012 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 19:06:58,014 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 19:06:59,967 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 19:06:59,968 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 19:07:00,998 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 19:07:00,998 INFO L314 CfgBuilder]: Removed 11 assume(true) statements. [2024-10-24 19:07:00,999 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:07:00 BoogieIcfgContainer [2024-10-24 19:07:00,999 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 19:07:01,000 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 19:07:01,000 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 19:07:01,003 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 19:07:01,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 07:06:56" (1/3) ... [2024-10-24 19:07:01,003 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe6564b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:07:01, skipping insertion in model container [2024-10-24 19:07:01,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:06:57" (2/3) ... [2024-10-24 19:07:01,003 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe6564b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:07:01, skipping insertion in model container [2024-10-24 19:07:01,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:07:00" (3/3) ... [2024-10-24 19:07:01,006 INFO L112 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-2.i [2024-10-24 19:07:01,019 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 19:07:01,019 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 520 error locations. [2024-10-24 19:07:01,019 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 19:07:01,163 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-24 19:07:01,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 860 places, 935 transitions, 1877 flow [2024-10-24 19:07:01,399 INFO L124 PetriNetUnfolderBase]: 148/1759 cut-off events. [2024-10-24 19:07:01,399 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-24 19:07:01,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1764 conditions, 1759 events. 148/1759 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 13213 event pairs, 0 based on Foata normal form. 0/628 useless extension candidates. Maximal degree in co-relation 904. Up to 6 conditions per place. [2024-10-24 19:07:01,419 INFO L82 GeneralOperation]: Start removeDead. Operand has 860 places, 935 transitions, 1877 flow [2024-10-24 19:07:01,446 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 860 places, 935 transitions, 1877 flow [2024-10-24 19:07:01,454 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:07:01,489 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;@6dc54dcc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:07:01,489 INFO L334 AbstractCegarLoop]: Starting to check reachability of 565 error locations. [2024-10-24 19:07:01,491 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:07:01,491 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2024-10-24 19:07:01,491 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:07:01,491 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:07:01,492 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-10-24 19:07:01,492 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [StealerErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 562 more)] === [2024-10-24 19:07:01,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:07:01,496 INFO L85 PathProgramCache]: Analyzing trace with hash 192034, now seen corresponding path program 1 times [2024-10-24 19:07:01,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:07:01,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338100438] [2024-10-24 19:07:01,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:07:01,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:07:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:07:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:07:01,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:07:01,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338100438] [2024-10-24 19:07:01,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338100438] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:07:01,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:07:01,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:07:01,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264815718] [2024-10-24 19:07:01,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:07:01,855 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:07:01,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:07:01,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:07:01,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:07:02,151 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 935 [2024-10-24 19:07:02,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 860 places, 935 transitions, 1877 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:07:02,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:07:02,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 935 [2024-10-24 19:07:02,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:07:09,361 INFO L124 PetriNetUnfolderBase]: 36148/78332 cut-off events. [2024-10-24 19:07:09,361 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2024-10-24 19:07:09,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144130 conditions, 78332 events. 36148/78332 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 948. Compared 794912 event pairs, 8638 based on Foata normal form. 764/49635 useless extension candidates. Maximal degree in co-relation 142883. Up to 36122 conditions per place. [2024-10-24 19:07:09,688 INFO L140 encePairwiseOnDemand]: 617/935 looper letters, 941 selfloop transitions, 73 changer transitions 0/1205 dead transitions. [2024-10-24 19:07:09,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 666 places, 1205 transitions, 4445 flow [2024-10-24 19:07:09,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:07:09,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:07:09,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2026 transitions. [2024-10-24 19:07:09,709 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7222816399286988 [2024-10-24 19:07:09,712 INFO L175 Difference]: Start difference. First operand has 860 places, 935 transitions, 1877 flow. Second operand 3 states and 2026 transitions. [2024-10-24 19:07:09,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 666 places, 1205 transitions, 4445 flow [2024-10-24 19:07:09,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 666 places, 1205 transitions, 4445 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 19:07:09,738 INFO L231 Difference]: Finished difference. Result has 668 places, 801 transitions, 2133 flow [2024-10-24 19:07:09,741 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=935, PETRI_DIFFERENCE_MINUEND_FLOW=1465, PETRI_DIFFERENCE_MINUEND_PLACES=664, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=656, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2133, PETRI_PLACES=668, PETRI_TRANSITIONS=801} [2024-10-24 19:07:09,745 INFO L277 CegarLoopForPetriNet]: 860 programPoint places, -192 predicate places. [2024-10-24 19:07:09,746 INFO L471 AbstractCegarLoop]: Abstraction has has 668 places, 801 transitions, 2133 flow [2024-10-24 19:07:09,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:07:09,746 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:07:09,746 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-10-24 19:07:09,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 19:07:09,747 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [StealerErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 562 more)] === [2024-10-24 19:07:09,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:07:09,747 INFO L85 PathProgramCache]: Analyzing trace with hash 192035, now seen corresponding path program 1 times [2024-10-24 19:07:09,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:07:09,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408682310] [2024-10-24 19:07:09,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:07:09,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:07:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:07:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:07:09,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:07:09,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408682310] [2024-10-24 19:07:09,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408682310] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:07:09,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:07:09,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:07:09,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506526768] [2024-10-24 19:07:09,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:07:09,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:07:09,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:07:09,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:07:09,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:07:10,097 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 935 [2024-10-24 19:07:10,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 668 places, 801 transitions, 2133 flow. Second operand has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:07:10,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:07:10,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 935 [2024-10-24 19:07:10,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:07:17,787 INFO L124 PetriNetUnfolderBase]: 35220/77354 cut-off events. [2024-10-24 19:07:17,788 INFO L125 PetriNetUnfolderBase]: For 7603/7915 co-relation queries the response was YES. [2024-10-24 19:07:17,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153283 conditions, 77354 events. 35220/77354 cut-off events. For 7603/7915 co-relation queries the response was YES. Maximal size of possible extension queue 976. Compared 782948 event pairs, 22704 based on Foata normal form. 2/51390 useless extension candidates. Maximal degree in co-relation 151927. Up to 62837 conditions per place. [2024-10-24 19:07:18,122 INFO L140 encePairwiseOnDemand]: 928/935 looper letters, 551 selfloop transitions, 4 changer transitions 0/813 dead transitions. [2024-10-24 19:07:18,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 667 places, 813 transitions, 3271 flow [2024-10-24 19:07:18,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:07:18,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:07:18,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1213 transitions. [2024-10-24 19:07:18,125 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4324420677361854 [2024-10-24 19:07:18,125 INFO L175 Difference]: Start difference. First operand has 668 places, 801 transitions, 2133 flow. Second operand 3 states and 1213 transitions. [2024-10-24 19:07:18,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 667 places, 813 transitions, 3271 flow [2024-10-24 19:07:18,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 665 places, 813 transitions, 3123 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:07:18,168 INFO L231 Difference]: Finished difference. Result has 666 places, 801 transitions, 2005 flow [2024-10-24 19:07:18,169 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=935, PETRI_DIFFERENCE_MINUEND_FLOW=1981, PETRI_DIFFERENCE_MINUEND_PLACES=663, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=794, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2005, PETRI_PLACES=666, PETRI_TRANSITIONS=801} [2024-10-24 19:07:18,169 INFO L277 CegarLoopForPetriNet]: 860 programPoint places, -194 predicate places. [2024-10-24 19:07:18,169 INFO L471 AbstractCegarLoop]: Abstraction has has 666 places, 801 transitions, 2005 flow [2024-10-24 19:07:18,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:07:18,170 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:07:18,170 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-24 19:07:18,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 19:07:18,170 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [StealerErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 562 more)] === [2024-10-24 19:07:18,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:07:18,170 INFO L85 PathProgramCache]: Analyzing trace with hash 184757380, now seen corresponding path program 1 times [2024-10-24 19:07:18,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:07:18,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433691476] [2024-10-24 19:07:18,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:07:18,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:07:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:07:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:07:18,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:07:18,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433691476] [2024-10-24 19:07:18,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433691476] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:07:18,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:07:18,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:07:18,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617246144] [2024-10-24 19:07:18,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:07:18,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:07:18,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:07:18,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:07:18,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:07:18,554 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 935 [2024-10-24 19:07:18,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 801 transitions, 2005 flow. Second operand has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:07:18,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:07:18,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 935 [2024-10-24 19:07:18,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:07:26,572 INFO L124 PetriNetUnfolderBase]: 38525/83168 cut-off events. [2024-10-24 19:07:26,572 INFO L125 PetriNetUnfolderBase]: For 4649/4693 co-relation queries the response was YES. [2024-10-24 19:07:26,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165005 conditions, 83168 events. 38525/83168 cut-off events. For 4649/4693 co-relation queries the response was YES. Maximal size of possible extension queue 986. Compared 844042 event pairs, 8292 based on Foata normal form. 37/53768 useless extension candidates. Maximal degree in co-relation 163687. Up to 36189 conditions per place. [2024-10-24 19:07:26,879 INFO L140 encePairwiseOnDemand]: 782/935 looper letters, 1001 selfloop transitions, 195 changer transitions 0/1384 dead transitions. [2024-10-24 19:07:26,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 1384 transitions, 5608 flow [2024-10-24 19:07:26,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:07:26,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:07:26,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 2169 transitions. [2024-10-24 19:07:26,883 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46395721925133687 [2024-10-24 19:07:26,883 INFO L175 Difference]: Start difference. First operand has 666 places, 801 transitions, 2005 flow. Second operand 5 states and 2169 transitions. [2024-10-24 19:07:26,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 668 places, 1384 transitions, 5608 flow [2024-10-24 19:07:26,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 667 places, 1384 transitions, 5603 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:07:26,900 INFO L231 Difference]: Finished difference. Result has 670 places, 907 transitions, 3082 flow [2024-10-24 19:07:26,901 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=935, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=663, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=657, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3082, PETRI_PLACES=670, PETRI_TRANSITIONS=907} [2024-10-24 19:07:26,902 INFO L277 CegarLoopForPetriNet]: 860 programPoint places, -190 predicate places. [2024-10-24 19:07:26,902 INFO L471 AbstractCegarLoop]: Abstraction has has 670 places, 907 transitions, 3082 flow [2024-10-24 19:07:26,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:07:26,902 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:07:26,903 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-24 19:07:26,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 19:07:26,903 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [StealerErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 562 more)] === [2024-10-24 19:07:26,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:07:26,903 INFO L85 PathProgramCache]: Analyzing trace with hash 184757381, now seen corresponding path program 1 times [2024-10-24 19:07:26,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:07:26,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532763864] [2024-10-24 19:07:26,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:07:26,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:07:26,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:07:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:07:27,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:07:27,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532763864] [2024-10-24 19:07:27,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532763864] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:07:27,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:07:27,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:07:27,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902730623] [2024-10-24 19:07:27,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:07:27,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:07:27,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:07:27,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:07:27,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:07:27,332 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 935 [2024-10-24 19:07:27,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 670 places, 907 transitions, 3082 flow. Second operand has 4 states, 4 states have (on average 233.75) internal successors, (935), 4 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:07:27,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:07:27,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 935 [2024-10-24 19:07:27,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand