./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3865508-c21e-45b7-8d17-7ccc869155ba/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3865508-c21e-45b7-8d17-7ccc869155ba/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3865508-c21e-45b7-8d17-7ccc869155ba/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3865508-c21e-45b7-8d17-7ccc869155ba/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3865508-c21e-45b7-8d17-7ccc869155ba/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3865508-c21e-45b7-8d17-7ccc869155ba/bin/uautomizer-verify-NlZe1sFDwI --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 0.2.4-dev-0e0057c [2023-11-24 21:39:00,294 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:39:00,363 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3865508-c21e-45b7-8d17-7ccc869155ba/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:39:00,369 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:39:00,370 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:39:00,403 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:39:00,405 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:39:00,406 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:39:00,407 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:39:00,412 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:39:00,412 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:39:00,413 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:39:00,414 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:39:00,416 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:39:00,416 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:39:00,417 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:39:00,417 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:39:00,418 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:39:00,418 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:39:00,418 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:39:00,419 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:39:00,419 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:39:00,420 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:39:00,420 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:39:00,421 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:39:00,421 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:39:00,422 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:39:00,422 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:39:00,423 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:39:00,424 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:39:00,425 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:39:00,425 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:39:00,425 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:39:00,426 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:39:00,426 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:39:00,426 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:39:00,427 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:39:00,427 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:39:00,427 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:39:00,427 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:39:00,428 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:39:00,428 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3865508-c21e-45b7-8d17-7ccc869155ba/bin/uautomizer-verify-NlZe1sFDwI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3865508-c21e-45b7-8d17-7ccc869155ba/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f [2023-11-24 21:39:00,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:39:00,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:39:00,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:39:00,750 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:39:00,750 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:39:00,752 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3865508-c21e-45b7-8d17-7ccc869155ba/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2023-11-24 21:39:04,030 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:39:04,547 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:39:04,547 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3865508-c21e-45b7-8d17-7ccc869155ba/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2023-11-24 21:39:04,582 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3865508-c21e-45b7-8d17-7ccc869155ba/bin/uautomizer-verify-NlZe1sFDwI/data/d7915bd5e/204996cfb5074238b8124d44fa1ec6a6/FLAG35ad6b7fb [2023-11-24 21:39:04,601 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3865508-c21e-45b7-8d17-7ccc869155ba/bin/uautomizer-verify-NlZe1sFDwI/data/d7915bd5e/204996cfb5074238b8124d44fa1ec6a6 [2023-11-24 21:39:04,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:39:04,609 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:39:04,614 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:39:04,615 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:39:04,620 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:39:04,623 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:39:04" (1/1) ... [2023-11-24 21:39:04,624 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f9d0469 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:04, skipping insertion in model container [2023-11-24 21:39:04,624 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:39:04" (1/1) ... [2023-11-24 21:39:04,720 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:39:05,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:39:05,622 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:39:05,751 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:39:05,968 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:39:05,968 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-24 21:39:05,977 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:39:05,978 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:05 WrapperNode [2023-11-24 21:39:05,978 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:39:05,979 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:39:05,980 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:39:05,980 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:39:05,988 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:05" (1/1) ... [2023-11-24 21:39:06,069 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:05" (1/1) ... [2023-11-24 21:39:06,200 INFO L138 Inliner]: procedures = 490, calls = 133, calls flagged for inlining = 48, calls inlined = 122, statements flattened = 1873 [2023-11-24 21:39:06,201 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:39:06,202 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:39:06,202 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:39:06,203 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:39:06,218 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:05" (1/1) ... [2023-11-24 21:39:06,218 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:05" (1/1) ... [2023-11-24 21:39:06,243 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:05" (1/1) ... [2023-11-24 21:39:06,356 INFO L175 MemorySlicer]: Split 287 memory accesses to 9 slices as follows [2, 4, 171, 8, 2, 6, 80, 12, 2]. 60 percent of accesses are in the largest equivalence class. The 28 initializations are split as follows [2, 0, 0, 2, 0, 0, 20, 4, 0]. The 97 writes are split as follows [0, 2, 63, 2, 1, 4, 20, 4, 1]. [2023-11-24 21:39:06,357 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:05" (1/1) ... [2023-11-24 21:39:06,357 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:05" (1/1) ... [2023-11-24 21:39:06,467 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:05" (1/1) ... [2023-11-24 21:39:06,478 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:05" (1/1) ... [2023-11-24 21:39:06,503 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:05" (1/1) ... [2023-11-24 21:39:06,525 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:05" (1/1) ... [2023-11-24 21:39:06,561 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:39:06,562 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:39:06,563 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:39:06,563 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:39:06,565 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:05" (1/1) ... [2023-11-24 21:39:06,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:39:06,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3865508-c21e-45b7-8d17-7ccc869155ba/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:39:06,605 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3865508-c21e-45b7-8d17-7ccc869155ba/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:39:06,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3865508-c21e-45b7-8d17-7ccc869155ba/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:39:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2023-11-24 21:39:06,652 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2023-11-24 21:39:06,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-24 21:39:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:39:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-24 21:39:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:39:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:39:06,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:39:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:39:06,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-24 21:39:06,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-24 21:39:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-24 21:39:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2023-11-24 21:39:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2023-11-24 21:39:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-24 21:39:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:39:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:39:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 21:39:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 21:39:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-24 21:39:06,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-24 21:39:06,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2023-11-24 21:39:06,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2023-11-24 21:39:06,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2023-11-24 21:39:06,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#8 [2023-11-24 21:39:06,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:39:06,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:39:06,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:39:06,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:39:06,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:39:06,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 21:39:06,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-24 21:39:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-24 21:39:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2023-11-24 21:39:06,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2023-11-24 21:39:06,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2023-11-24 21:39:06,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#8 [2023-11-24 21:39:06,663 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-24 21:39:06,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:39:06,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:39:06,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:39:06,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:39:06,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-24 21:39:06,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-24 21:39:06,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-24 21:39:06,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2023-11-24 21:39:06,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2023-11-24 21:39:06,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:39:06,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:39:06,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:39:06,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:39:06,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-24 21:39:06,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-24 21:39:06,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-24 21:39:06,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-24 21:39:06,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-11-24 21:39:06,713 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:39:07,198 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:39:07,200 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:39:10,559 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:39:13,111 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:39:13,112 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-24 21:39:13,113 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:39:13 BoogieIcfgContainer [2023-11-24 21:39:13,113 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:39:13,117 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:39:13,117 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:39:13,121 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:39:13,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:39:04" (1/3) ... [2023-11-24 21:39:13,122 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382dc34a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:39:13, skipping insertion in model container [2023-11-24 21:39:13,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:05" (2/3) ... [2023-11-24 21:39:13,124 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382dc34a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:39:13, skipping insertion in model container [2023-11-24 21:39:13,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:39:13" (3/3) ... [2023-11-24 21:39:13,127 INFO L112 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-2.i [2023-11-24 21:39:13,153 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:39:13,154 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 520 error locations. [2023-11-24 21:39:13,154 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:39:13,467 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-24 21:39:13,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 808 places, 857 transitions, 1721 flow [2023-11-24 21:39:14,138 INFO L124 PetriNetUnfolderBase]: 98/1609 cut-off events. [2023-11-24 21:39:14,139 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-24 21:39:14,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1614 conditions, 1609 events. 98/1609 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 12378 event pairs, 0 based on Foata normal form. 0/528 useless extension candidates. Maximal degree in co-relation 826. Up to 4 conditions per place. [2023-11-24 21:39:14,165 INFO L82 GeneralOperation]: Start removeDead. Operand has 808 places, 857 transitions, 1721 flow [2023-11-24 21:39:14,216 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 808 places, 857 transitions, 1721 flow [2023-11-24 21:39:14,237 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:39:14,251 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7158989e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:39:14,251 INFO L358 AbstractCegarLoop]: Starting to check reachability of 565 error locations. [2023-11-24 21:39:14,254 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:39:14,255 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-24 21:39:14,255 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-24 21:39:14,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:14,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:39:14,257 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [StealerErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 562 more)] === [2023-11-24 21:39:14,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:14,262 INFO L85 PathProgramCache]: Analyzing trace with hash 196754, now seen corresponding path program 1 times [2023-11-24 21:39:14,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:39:14,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346071666] [2023-11-24 21:39:14,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:14,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:39:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:39:14,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:39:14,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346071666] [2023-11-24 21:39:14,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346071666] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:14,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:14,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:39:14,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073734657] [2023-11-24 21:39:14,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:14,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:39:14,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:39:14,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:39:14,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:39:15,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 857 [2023-11-24 21:39:15,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 808 places, 857 transitions, 1721 flow. Second operand has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:15,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:15,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 857 [2023-11-24 21:39:15,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:23,937 INFO L124 PetriNetUnfolderBase]: 17609/39700 cut-off events. [2023-11-24 21:39:23,938 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-11-24 21:39:23,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72676 conditions, 39700 events. 17609/39700 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 371660 event pairs, 9679 based on Foata normal form. 425/23141 useless extension candidates. Maximal degree in co-relation 71586. Up to 32393 conditions per place. [2023-11-24 21:39:24,203 INFO L140 encePairwiseOnDemand]: 650/857 looper letters, 505 selfloop transitions, 6 changer transitions 0/692 dead transitions. [2023-11-24 21:39:24,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 692 transitions, 2413 flow [2023-11-24 21:39:24,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:39:24,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:39:24,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1275 transitions. [2023-11-24 21:39:24,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959159859976663 [2023-11-24 21:39:24,233 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1275 transitions. [2023-11-24 21:39:24,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1275 transitions. [2023-11-24 21:39:24,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:24,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1275 transitions. [2023-11-24 21:39:24,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 425.0) internal successors, (1275), 3 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:24,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 857.0) internal successors, (3428), 4 states have internal predecessors, (3428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:24,267 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 857.0) internal successors, (3428), 4 states have internal predecessors, (3428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:24,269 INFO L175 Difference]: Start difference. First operand has 808 places, 857 transitions, 1721 flow. Second operand 3 states and 1275 transitions. [2023-11-24 21:39:24,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 692 transitions, 2413 flow [2023-11-24 21:39:24,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 692 transitions, 2413 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-24 21:39:24,304 INFO L231 Difference]: Finished difference. Result has 615 places, 656 transitions, 1347 flow [2023-11-24 21:39:24,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=857, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1347, PETRI_PLACES=615, PETRI_TRANSITIONS=656} [2023-11-24 21:39:24,314 INFO L281 CegarLoopForPetriNet]: 808 programPoint places, -193 predicate places. [2023-11-24 21:39:24,315 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 656 transitions, 1347 flow [2023-11-24 21:39:24,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.66666666666666) internal successors, (545), 3 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:24,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:24,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-24 21:39:24,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:39:24,317 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [StealerErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 562 more)] === [2023-11-24 21:39:24,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:24,318 INFO L85 PathProgramCache]: Analyzing trace with hash 196755, now seen corresponding path program 1 times [2023-11-24 21:39:24,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:39:24,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834554025] [2023-11-24 21:39:24,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:24,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:39:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:39:24,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:39:24,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834554025] [2023-11-24 21:39:24,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834554025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:24,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:24,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:39:24,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088811629] [2023-11-24 21:39:24,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:24,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:39:24,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:39:24,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:39:24,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:39:24,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 857 [2023-11-24 21:39:24,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 656 transitions, 1347 flow. Second operand has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:24,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:24,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 857 [2023-11-24 21:39:24,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:31,402 INFO L124 PetriNetUnfolderBase]: 16704/38284 cut-off events. [2023-11-24 21:39:31,403 INFO L125 PetriNetUnfolderBase]: For 804/807 co-relation queries the response was YES. [2023-11-24 21:39:31,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70530 conditions, 38284 events. 16704/38284 cut-off events. For 804/807 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 361473 event pairs, 12775 based on Foata normal form. 2/21934 useless extension candidates. Maximal degree in co-relation 69441. Up to 31187 conditions per place. [2023-11-24 21:39:31,611 INFO L140 encePairwiseOnDemand]: 850/857 looper letters, 473 selfloop transitions, 4 changer transitions 0/668 dead transitions. [2023-11-24 21:39:31,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 668 transitions, 2328 flow [2023-11-24 21:39:31,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:39:31,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:39:31,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1057 transitions. [2023-11-24 21:39:31,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.411124076234928 [2023-11-24 21:39:31,617 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1057 transitions. [2023-11-24 21:39:31,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1057 transitions. [2023-11-24 21:39:31,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:31,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1057 transitions. [2023-11-24 21:39:31,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 352.3333333333333) internal successors, (1057), 3 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:31,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 857.0) internal successors, (3428), 4 states have internal predecessors, (3428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:31,634 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 857.0) internal successors, (3428), 4 states have internal predecessors, (3428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:31,634 INFO L175 Difference]: Start difference. First operand has 615 places, 656 transitions, 1347 flow. Second operand 3 states and 1057 transitions. [2023-11-24 21:39:31,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 668 transitions, 2328 flow [2023-11-24 21:39:31,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 613 places, 668 transitions, 2321 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:39:31,661 INFO L231 Difference]: Finished difference. Result has 614 places, 656 transitions, 1359 flow [2023-11-24 21:39:31,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=857, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1359, PETRI_PLACES=614, PETRI_TRANSITIONS=656} [2023-11-24 21:39:31,663 INFO L281 CegarLoopForPetriNet]: 808 programPoint places, -194 predicate places. [2023-11-24 21:39:31,664 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 656 transitions, 1359 flow [2023-11-24 21:39:31,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:31,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:31,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-24 21:39:31,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:39:31,666 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [StealerErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 562 more)] === [2023-11-24 21:39:31,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:31,666 INFO L85 PathProgramCache]: Analyzing trace with hash 189296300, now seen corresponding path program 1 times [2023-11-24 21:39:31,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:39:31,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759229755] [2023-11-24 21:39:31,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:31,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:39:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:39:31,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:39:31,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759229755] [2023-11-24 21:39:31,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759229755] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:31,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:31,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:39:31,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454430922] [2023-11-24 21:39:31,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:31,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:39:31,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:39:31,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:39:31,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:39:32,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 857 [2023-11-24 21:39:32,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 656 transitions, 1359 flow. Second operand has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:32,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:32,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 857 [2023-11-24 21:39:32,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:43,916 INFO L124 PetriNetUnfolderBase]: 32271/71977 cut-off events. [2023-11-24 21:39:43,916 INFO L125 PetriNetUnfolderBase]: For 1546/1548 co-relation queries the response was YES. [2023-11-24 21:39:44,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135436 conditions, 71977 events. 32271/71977 cut-off events. For 1546/1548 co-relation queries the response was YES. Maximal size of possible extension queue 941. Compared 744593 event pairs, 7600 based on Foata normal form. 1/43837 useless extension candidates. Maximal degree in co-relation 134320. Up to 32321 conditions per place. [2023-11-24 21:39:44,261 INFO L140 encePairwiseOnDemand]: 662/857 looper letters, 889 selfloop transitions, 200 changer transitions 0/1251 dead transitions. [2023-11-24 21:39:44,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 1251 transitions, 4758 flow [2023-11-24 21:39:44,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:39:44,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:39:44,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1973 transitions. [2023-11-24 21:39:44,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4604434072345391 [2023-11-24 21:39:44,271 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1973 transitions. [2023-11-24 21:39:44,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1973 transitions. [2023-11-24 21:39:44,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:44,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1973 transitions. [2023-11-24 21:39:44,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 394.6) internal successors, (1973), 5 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:44,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 857.0) internal successors, (5142), 6 states have internal predecessors, (5142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:44,294 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 857.0) internal successors, (5142), 6 states have internal predecessors, (5142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:44,294 INFO L175 Difference]: Start difference. First operand has 614 places, 656 transitions, 1359 flow. Second operand 5 states and 1973 transitions. [2023-11-24 21:39:44,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 1251 transitions, 4758 flow [2023-11-24 21:39:44,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 1251 transitions, 4753 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:39:44,325 INFO L231 Difference]: Finished difference. Result has 619 places, 832 transitions, 2929 flow [2023-11-24 21:39:44,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=857, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2929, PETRI_PLACES=619, PETRI_TRANSITIONS=832} [2023-11-24 21:39:44,328 INFO L281 CegarLoopForPetriNet]: 808 programPoint places, -189 predicate places. [2023-11-24 21:39:44,329 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 832 transitions, 2929 flow [2023-11-24 21:39:44,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:44,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:44,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-24 21:39:44,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:39:44,330 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [StealerErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, StealerErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 562 more)] === [2023-11-24 21:39:44,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:44,332 INFO L85 PathProgramCache]: Analyzing trace with hash 189296301, now seen corresponding path program 1 times [2023-11-24 21:39:44,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:39:44,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131523598] [2023-11-24 21:39:44,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:44,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:39:44,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:39:44,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:39:44,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131523598] [2023-11-24 21:39:44,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131523598] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:44,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:44,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:39:44,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721351074] [2023-11-24 21:39:44,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:44,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:39:44,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:39:44,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:39:44,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:39:45,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 857 [2023-11-24 21:39:45,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 832 transitions, 2929 flow. Second operand has 4 states, 4 states have (on average 194.75) internal successors, (779), 4 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:45,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:45,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 857 [2023-11-24 21:39:45,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand