./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 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/AutomizerReach.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-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 14:28:28,473 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 14:28:28,591 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 14:28:28,599 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 14:28:28,600 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 14:28:28,631 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 14:28:28,632 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 14:28:28,633 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 14:28:28,634 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 14:28:28,635 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 14:28:28,636 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 14:28:28,636 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 14:28:28,637 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 14:28:28,637 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 14:28:28,639 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 14:28:28,639 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 14:28:28,640 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 14:28:28,640 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 14:28:28,640 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 14:28:28,640 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 14:28:28,641 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 14:28:28,643 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 14:28:28,644 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 14:28:28,644 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 14:28:28,644 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 14:28:28,644 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 14:28:28,645 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 14:28:28,645 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 14:28:28,645 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 14:28:28,646 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 14:28:28,646 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 14:28:28,646 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 14:28:28,647 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:28:28,647 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 14:28:28,647 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 14:28:28,647 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 14:28:28,647 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 14:28:28,647 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 14:28:28,648 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 14:28:28,648 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 14:28:28,648 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 14:28:28,649 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 14:28:28,649 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f [2024-10-14 14:28:28,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 14:28:28,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 14:28:28,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 14:28:28,931 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 14:28:28,932 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 14:28:28,934 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2024-10-14 14:28:30,351 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 14:28:30,669 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 14:28:30,671 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i [2024-10-14 14:28:30,702 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dbbb825c/45b938481f6b4d76b5669559ee9c9357/FLAG90b0b5315 [2024-10-14 14:28:30,923 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dbbb825c/45b938481f6b4d76b5669559ee9c9357 [2024-10-14 14:28:30,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 14:28:30,927 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 14:28:30,928 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 14:28:30,928 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 14:28:30,934 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 14:28:30,935 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:28:30" (1/1) ... [2024-10-14 14:28:30,936 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a1ec7f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:30, skipping insertion in model container [2024-10-14 14:28:30,936 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:28:30" (1/1) ... [2024-10-14 14:28:31,000 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 14:28:31,631 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2024-10-14 14:28:31,662 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2024-10-14 14:28:31,669 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2024-10-14 14:28:31,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:28:31,701 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 14:28:31,753 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2024-10-14 14:28:31,770 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2024-10-14 14:28:31,777 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2024-10-14 14:28:31,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:28:31,909 INFO L204 MainTranslator]: Completed translation [2024-10-14 14:28:31,910 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:31 WrapperNode [2024-10-14 14:28:31,911 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 14:28:31,912 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 14:28:31,912 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 14:28:31,913 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 14:28:31,920 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:31" (1/1) ... [2024-10-14 14:28:31,967 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:31" (1/1) ... [2024-10-14 14:28:32,073 INFO L138 Inliner]: procedures = 490, calls = 130, calls flagged for inlining = 45, calls inlined = 117, statements flattened = 1856 [2024-10-14 14:28:32,074 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 14:28:32,075 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 14:28:32,075 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 14:28:32,075 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 14:28:32,085 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:31" (1/1) ... [2024-10-14 14:28:32,086 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:31" (1/1) ... [2024-10-14 14:28:32,100 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:31" (1/1) ... [2024-10-14 14:28:32,155 INFO L175 MemorySlicer]: Split 287 memory accesses to 9 slices as follows [2, 12, 2, 171, 8, 4, 6, 2, 80]. 60 percent of accesses are in the largest equivalence class. The 28 initializations are split as follows [2, 4, 0, 0, 2, 0, 0, 0, 20]. The 97 writes are split as follows [0, 4, 1, 63, 2, 2, 4, 1, 20]. [2024-10-14 14:28:32,155 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:31" (1/1) ... [2024-10-14 14:28:32,156 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:31" (1/1) ... [2024-10-14 14:28:32,231 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:31" (1/1) ... [2024-10-14 14:28:32,250 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:31" (1/1) ... [2024-10-14 14:28:32,266 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:31" (1/1) ... [2024-10-14 14:28:32,279 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:31" (1/1) ... [2024-10-14 14:28:32,298 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 14:28:32,300 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 14:28:32,300 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 14:28:32,300 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 14:28:32,301 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:31" (1/1) ... [2024-10-14 14:28:32,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:28:32,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:28:32,337 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) [2024-10-14 14:28:32,340 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 [2024-10-14 14:28:32,379 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2024-10-14 14:28:32,379 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2024-10-14 14:28:32,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-14 14:28:32,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 14:28:32,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-14 14:28:32,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 14:28:32,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 14:28:32,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-14 14:28:32,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-14 14:28:32,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-10-14 14:28:32,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-10-14 14:28:32,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-10-14 14:28:32,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-10-14 14:28:32,381 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2024-10-14 14:28:32,381 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-14 14:28:32,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 14:28:32,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-14 14:28:32,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-14 14:28:32,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-14 14:28:32,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-10-14 14:28:32,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2024-10-14 14:28:32,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2024-10-14 14:28:32,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2024-10-14 14:28:32,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2024-10-14 14:28:32,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#8 [2024-10-14 14:28:32,383 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 14:28:32,383 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 14:28:32,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-14 14:28:32,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-14 14:28:32,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-14 14:28:32,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-14 14:28:32,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-10-14 14:28:32,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2024-10-14 14:28:32,383 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2024-10-14 14:28:32,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2024-10-14 14:28:32,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2024-10-14 14:28:32,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#8 [2024-10-14 14:28:32,384 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-14 14:28:32,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 14:28:32,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 14:28:32,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-14 14:28:32,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-14 14:28:32,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-10-14 14:28:32,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-10-14 14:28:32,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-10-14 14:28:32,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-10-14 14:28:32,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2024-10-14 14:28:32,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 14:28:32,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 14:28:32,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-14 14:28:32,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-14 14:28:32,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-10-14 14:28:32,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-10-14 14:28:32,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-10-14 14:28:32,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-10-14 14:28:32,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2024-10-14 14:28:32,388 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 14:28:32,715 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 14:28:32,717 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 14:28:34,579 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 14:28:34,580 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 14:28:35,884 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 14:28:35,886 INFO L314 CfgBuilder]: Removed 11 assume(true) statements. [2024-10-14 14:28:35,886 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:28:35 BoogieIcfgContainer [2024-10-14 14:28:35,886 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 14:28:35,889 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 14:28:35,889 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 14:28:35,892 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 14:28:35,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:28:30" (1/3) ... [2024-10-14 14:28:35,893 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5725346e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:28:35, skipping insertion in model container [2024-10-14 14:28:35,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:28:31" (2/3) ... [2024-10-14 14:28:35,893 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5725346e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:28:35, skipping insertion in model container [2024-10-14 14:28:35,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:28:35" (3/3) ... [2024-10-14 14:28:35,895 INFO L112 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-2.i [2024-10-14 14:28:35,912 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 14:28:35,913 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-10-14 14:28:35,913 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 14:28:36,070 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-14 14:28:36,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 282 transitions, 571 flow [2024-10-14 14:28:36,310 INFO L124 PetriNetUnfolderBase]: 98/529 cut-off events. [2024-10-14 14:28:36,311 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-14 14:28:36,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 534 conditions, 529 events. 98/529 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2464 event pairs, 0 based on Foata normal form. 0/418 useless extension candidates. Maximal degree in co-relation 271. Up to 6 conditions per place. [2024-10-14 14:28:36,323 INFO L82 GeneralOperation]: Start removeDead. Operand has 233 places, 282 transitions, 571 flow [2024-10-14 14:28:36,335 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 233 places, 282 transitions, 571 flow [2024-10-14 14:28:36,349 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:28:36,360 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=LoopHeads, 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;@5eff18dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:28:36,360 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-14 14:28:36,373 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:28:36,374 INFO L124 PetriNetUnfolderBase]: 1/26 cut-off events. [2024-10-14 14:28:36,374 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 14:28:36,374 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:28:36,375 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:28:36,377 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-14 14:28:36,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:28:36,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1832542191, now seen corresponding path program 1 times [2024-10-14 14:28:36,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:28:36,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862835522] [2024-10-14 14:28:36,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:28:36,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:28:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:28:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:28:36,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:28:36,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862835522] [2024-10-14 14:28:36,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862835522] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:28:36,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:28:36,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:28:36,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351361464] [2024-10-14 14:28:36,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:28:36,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:28:36,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:28:36,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:28:36,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:28:36,988 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 282 [2024-10-14 14:28:36,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 282 transitions, 571 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2024-10-14 14:28:36,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:28:36,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 282 [2024-10-14 14:28:36,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:28:40,400 INFO L124 PetriNetUnfolderBase]: 8298/15350 cut-off events. [2024-10-14 14:28:40,401 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-14 14:28:40,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29596 conditions, 15350 events. 8298/15350 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 94408 event pairs, 2788 based on Foata normal form. 146/14121 useless extension candidates. Maximal degree in co-relation 29524. Up to 7131 conditions per place. [2024-10-14 14:28:40,494 INFO L140 encePairwiseOnDemand]: 264/282 looper letters, 457 selfloop transitions, 12 changer transitions 2/505 dead transitions. [2024-10-14 14:28:40,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 505 transitions, 1959 flow [2024-10-14 14:28:40,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:28:40,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:28:40,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 589 transitions. [2024-10-14 14:28:40,510 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6962174940898345 [2024-10-14 14:28:40,514 INFO L175 Difference]: Start difference. First operand has 233 places, 282 transitions, 571 flow. Second operand 3 states and 589 transitions. [2024-10-14 14:28:40,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 505 transitions, 1959 flow [2024-10-14 14:28:40,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 505 transitions, 1959 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 14:28:40,537 INFO L231 Difference]: Finished difference. Result has 236 places, 280 transitions, 611 flow [2024-10-14 14:28:40,541 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=611, PETRI_PLACES=236, PETRI_TRANSITIONS=280} [2024-10-14 14:28:40,545 INFO L277 CegarLoopForPetriNet]: 233 programPoint places, 3 predicate places. [2024-10-14 14:28:40,546 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 280 transitions, 611 flow [2024-10-14 14:28:40,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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) [2024-10-14 14:28:40,546 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:28:40,547 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:28:40,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 14:28:40,547 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-14 14:28:40,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:28:40,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1697191724, now seen corresponding path program 1 times [2024-10-14 14:28:40,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:28:40,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27901965] [2024-10-14 14:28:40,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:28:40,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:28:40,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:28:40,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:28:40,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:28:40,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27901965] [2024-10-14 14:28:40,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27901965] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:28:40,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349662297] [2024-10-14 14:28:40,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:28:40,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:28:40,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:28:40,727 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:28:40,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 14:28:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:28:40,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 14:28:40,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:28:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:28:40,983 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:28:41,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:28:41,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349662297] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:28:41,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:28:41,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-14 14:28:41,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482768604] [2024-10-14 14:28:41,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:28:41,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 14:28:41,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:28:41,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 14:28:41,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-14 14:28:41,007 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 282 [2024-10-14 14:28:41,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 280 transitions, 611 flow. Second operand has 7 states, 7 states have (on average 36.142857142857146) internal successors, (253), 7 states have internal predecessors, (253), 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) [2024-10-14 14:28:41,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:28:41,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 282 [2024-10-14 14:28:41,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:28:41,167 INFO L124 PetriNetUnfolderBase]: 47/132 cut-off events. [2024-10-14 14:28:41,167 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-10-14 14:28:41,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 132 events. 47/132 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 364 event pairs, 0 based on Foata normal form. 21/146 useless extension candidates. Maximal degree in co-relation 236. Up to 79 conditions per place. [2024-10-14 14:28:41,168 INFO L140 encePairwiseOnDemand]: 277/282 looper letters, 50 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2024-10-14 14:28:41,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 60 transitions, 258 flow [2024-10-14 14:28:41,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 14:28:41,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 14:28:41,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 265 transitions. [2024-10-14 14:28:41,172 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.1566193853427896 [2024-10-14 14:28:41,172 INFO L175 Difference]: Start difference. First operand has 236 places, 280 transitions, 611 flow. Second operand 6 states and 265 transitions. [2024-10-14 14:28:41,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 60 transitions, 258 flow [2024-10-14 14:28:41,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 60 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 14:28:41,174 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 112 flow [2024-10-14 14:28:41,175 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=112, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2024-10-14 14:28:41,176 INFO L277 CegarLoopForPetriNet]: 233 programPoint places, -194 predicate places. [2024-10-14 14:28:41,176 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 112 flow [2024-10-14 14:28:41,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 36.142857142857146) internal successors, (253), 7 states have internal predecessors, (253), 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) [2024-10-14 14:28:41,176 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:28:41,177 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:28:41,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 14:28:41,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:28:41,382 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-14 14:28:41,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:28:41,383 INFO L85 PathProgramCache]: Analyzing trace with hash -881324335, now seen corresponding path program 2 times [2024-10-14 14:28:41,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:28:41,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524771503] [2024-10-14 14:28:41,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:28:41,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:28:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:28:41,457 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-14 14:28:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-14 14:28:41,535 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-14 14:28:41,535 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-14 14:28:41,536 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-10-14 14:28:41,538 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-10-14 14:28:41,539 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-10-14 14:28:41,540 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-10-14 14:28:41,540 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-10-14 14:28:41,540 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-10-14 14:28:41,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 14:28:41,541 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1] [2024-10-14 14:28:41,545 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-14 14:28:41,545 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-14 14:28:41,677 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-14 14:28:41,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 255 places, 307 transitions, 630 flow [2024-10-14 14:28:41,918 INFO L124 PetriNetUnfolderBase]: 152/815 cut-off events. [2024-10-14 14:28:41,919 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-14 14:28:41,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 815 events. 152/815 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 4582 event pairs, 0 based on Foata normal form. 0/643 useless extension candidates. Maximal degree in co-relation 531. Up to 9 conditions per place. [2024-10-14 14:28:41,923 INFO L82 GeneralOperation]: Start removeDead. Operand has 255 places, 307 transitions, 630 flow [2024-10-14 14:28:41,929 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 255 places, 307 transitions, 630 flow [2024-10-14 14:28:41,932 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:28:41,933 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=LoopHeads, 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;@5eff18dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:28:41,937 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-14 14:28:41,945 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:28:41,946 INFO L124 PetriNetUnfolderBase]: 3/57 cut-off events. [2024-10-14 14:28:41,946 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-14 14:28:41,946 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:28:41,947 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:28:41,947 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-14 14:28:41,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:28:41,948 INFO L85 PathProgramCache]: Analyzing trace with hash -30839496, now seen corresponding path program 1 times [2024-10-14 14:28:41,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:28:41,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323551094] [2024-10-14 14:28:41,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:28:41,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:28:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:28:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:28:42,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:28:42,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323551094] [2024-10-14 14:28:42,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323551094] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:28:42,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:28:42,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:28:42,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115204234] [2024-10-14 14:28:42,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:28:42,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:28:42,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:28:42,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:28:42,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:28:42,030 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 307 [2024-10-14 14:28:42,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 307 transitions, 630 flow. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2024-10-14 14:28:42,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:28:42,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 307 [2024-10-14 14:28:42,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand