./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c4f91361 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 ../../../trunk/examples/svcomp/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 0.2.3-dev-c4f9136-m [2023-11-23 14:35:11,108 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 14:35:11,185 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 14:35:11,192 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 14:35:11,192 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 14:35:11,229 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 14:35:11,229 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 14:35:11,230 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 14:35:11,231 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 14:35:11,235 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 14:35:11,235 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 14:35:11,235 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 14:35:11,236 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 14:35:11,238 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 14:35:11,238 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 14:35:11,238 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 14:35:11,238 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 14:35:11,239 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 14:35:11,239 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 14:35:11,239 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 14:35:11,240 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 14:35:11,241 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 14:35:11,241 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 14:35:11,241 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 14:35:11,242 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 14:35:11,242 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 14:35:11,242 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 14:35:11,243 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 14:35:11,243 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 14:35:11,243 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 14:35:11,244 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 14:35:11,245 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 14:35:11,245 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 14:35:11,245 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 14:35:11,245 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 14:35:11,246 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 14:35:11,246 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 14:35:11,246 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 14:35:11,246 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 14:35:11,246 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 14:35:11,247 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 14:35:11,247 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 14:35:11,247 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef1ebb9985ad6dadbe7cf99c72a7d7cbd507bc2d179a6afec5353fae325d63f [2023-11-23 14:35:11,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 14:35:11,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 14:35:11,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 14:35:11,547 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 14:35:11,547 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 14:35:11,548 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i [2023-11-23 14:35:12,752 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 14:35:13,087 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 14:35:13,090 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i [2023-11-23 14:35:13,118 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8bea3cd2/30f9dbc38d2d49dd927e59b3a2bfc03f/FLAG0636ccb84 [2023-11-23 14:35:13,130 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8bea3cd2/30f9dbc38d2d49dd927e59b3a2bfc03f [2023-11-23 14:35:13,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 14:35:13,134 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 14:35:13,137 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 14:35:13,137 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 14:35:13,142 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 14:35:13,142 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:35:13" (1/1) ... [2023-11-23 14:35:13,143 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59eac198 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:13, skipping insertion in model container [2023-11-23 14:35:13,143 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:35:13" (1/1) ... [2023-11-23 14:35:13,203 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 14:35:13,798 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2023-11-23 14:35:13,837 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2023-11-23 14:35:13,840 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2023-11-23 14:35:13,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 14:35:13,871 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 14:35:13,927 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[76469,76482] [2023-11-23 14:35:13,950 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79042,79055] [2023-11-23 14:35:13,952 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i[79451,79464] [2023-11-23 14:35:13,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 14:35:14,052 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 14:35:14,052 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 14:35:14,059 INFO L206 MainTranslator]: Completed translation [2023-11-23 14:35:14,060 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:14 WrapperNode [2023-11-23 14:35:14,060 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 14:35:14,061 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 14:35:14,061 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 14:35:14,061 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 14:35:14,067 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:14" (1/1) ... [2023-11-23 14:35:14,115 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:14" (1/1) ... [2023-11-23 14:35:14,203 INFO L138 Inliner]: procedures = 490, calls = 130, calls flagged for inlining = 45, calls inlined = 117, statements flattened = 1858 [2023-11-23 14:35:14,204 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 14:35:14,204 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 14:35:14,204 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 14:35:14,205 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 14:35:14,215 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:14" (1/1) ... [2023-11-23 14:35:14,215 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:14" (1/1) ... [2023-11-23 14:35:14,240 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:14" (1/1) ... [2023-11-23 14:35:14,315 INFO L175 MemorySlicer]: Split 287 memory accesses to 9 slices as follows [8, 2, 12, 4, 80, 2, 2, 171, 6]. 60 percent of accesses are in the largest equivalence class. The 28 initializations are split as follows [2, 2, 4, 0, 20, 0, 0, 0, 0]. The 97 writes are split as follows [2, 0, 4, 2, 20, 1, 1, 63, 4]. [2023-11-23 14:35:14,320 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:14" (1/1) ... [2023-11-23 14:35:14,321 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:14" (1/1) ... [2023-11-23 14:35:14,373 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:14" (1/1) ... [2023-11-23 14:35:14,387 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:14" (1/1) ... [2023-11-23 14:35:14,408 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:14" (1/1) ... [2023-11-23 14:35:14,423 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:14" (1/1) ... [2023-11-23 14:35:14,435 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 14:35:14,436 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 14:35:14,436 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 14:35:14,436 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 14:35:14,437 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:14" (1/1) ... [2023-11-23 14:35:14,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 14:35:14,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:35:14,473 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 14:35:14,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 14:35:14,528 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2023-11-23 14:35:14,529 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2023-11-23 14:35:14,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 14:35:14,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 14:35:14,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 14:35:14,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 14:35:14,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 14:35:14,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 14:35:14,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-23 14:35:14,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-23 14:35:14,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2023-11-23 14:35:14,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2023-11-23 14:35:14,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2023-11-23 14:35:14,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2023-11-23 14:35:14,532 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-23 14:35:14,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 14:35:14,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-23 14:35:14,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-23 14:35:14,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-23 14:35:14,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2023-11-23 14:35:14,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2023-11-23 14:35:14,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2023-11-23 14:35:14,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2023-11-23 14:35:14,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2023-11-23 14:35:14,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#8 [2023-11-23 14:35:14,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 14:35:14,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 14:35:14,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 14:35:14,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-23 14:35:14,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-23 14:35:14,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-23 14:35:14,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2023-11-23 14:35:14,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2023-11-23 14:35:14,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2023-11-23 14:35:14,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2023-11-23 14:35:14,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2023-11-23 14:35:14,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#8 [2023-11-23 14:35:14,539 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-23 14:35:14,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 14:35:14,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 14:35:14,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 14:35:14,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-23 14:35:14,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-23 14:35:14,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2023-11-23 14:35:14,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2023-11-23 14:35:14,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2023-11-23 14:35:14,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2023-11-23 14:35:14,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 14:35:14,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 14:35:14,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 14:35:14,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-23 14:35:14,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-23 14:35:14,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-23 14:35:14,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-23 14:35:14,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-23 14:35:14,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-11-23 14:35:14,546 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 14:35:14,877 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 14:35:14,879 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 14:35:16,497 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 14:35:17,800 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 14:35:17,801 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-23 14:35:17,802 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:35:17 BoogieIcfgContainer [2023-11-23 14:35:17,802 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 14:35:17,804 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 14:35:17,804 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 14:35:17,807 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 14:35:17,808 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:35:13" (1/3) ... [2023-11-23 14:35:17,808 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@354f4235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:35:17, skipping insertion in model container [2023-11-23 14:35:17,809 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:14" (2/3) ... [2023-11-23 14:35:17,810 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@354f4235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:35:17, skipping insertion in model container [2023-11-23 14:35:17,810 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:35:17" (3/3) ... [2023-11-23 14:35:17,813 INFO L112 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-2.i [2023-11-23 14:35:17,823 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 14:35:17,831 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 14:35:17,832 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-11-23 14:35:17,832 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 14:35:17,927 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-23 14:35:17,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 204 transitions, 415 flow [2023-11-23 14:35:18,128 INFO L124 PetriNetUnfolderBase]: 48/379 cut-off events. [2023-11-23 14:35:18,128 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-23 14:35:18,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 379 events. 48/379 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1727 event pairs, 0 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 193. Up to 4 conditions per place. [2023-11-23 14:35:18,135 INFO L82 GeneralOperation]: Start removeDead. Operand has 181 places, 204 transitions, 415 flow [2023-11-23 14:35:18,145 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 204 transitions, 415 flow [2023-11-23 14:35:18,159 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 14:35:18,167 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=true, 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;@3cb45024, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 14:35:18,167 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-23 14:35:18,176 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 14:35:18,177 INFO L124 PetriNetUnfolderBase]: 1/25 cut-off events. [2023-11-23 14:35:18,177 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 14:35:18,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 14:35:18,178 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:35:18,179 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-23 14:35:18,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:35:18,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1608315354, now seen corresponding path program 1 times [2023-11-23 14:35:18,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:35:18,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275746341] [2023-11-23 14:35:18,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:18,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:35:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:35:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 14:35:18,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:35:18,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275746341] [2023-11-23 14:35:18,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275746341] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:35:18,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:35:18,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 14:35:18,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971267495] [2023-11-23 14:35:18,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:35:18,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 14:35:18,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:35:18,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 14:35:18,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 14:35:18,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 204 [2023-11-23 14:35:18,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 204 transitions, 415 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2023-11-23 14:35:18,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 14:35:18,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 204 [2023-11-23 14:35:18,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 14:35:21,280 INFO L124 PetriNetUnfolderBase]: 5244/9970 cut-off events. [2023-11-23 14:35:21,280 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-23 14:35:21,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19736 conditions, 9970 events. 5244/9970 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 59726 event pairs, 2100 based on Foata normal form. 130/8909 useless extension candidates. Maximal degree in co-relation 19666. Up to 4891 conditions per place. [2023-11-23 14:35:21,330 INFO L140 encePairwiseOnDemand]: 186/204 looper letters, 353 selfloop transitions, 12 changer transitions 2/375 dead transitions. [2023-11-23 14:35:21,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 375 transitions, 1491 flow [2023-11-23 14:35:21,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 14:35:21,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 14:35:21,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2023-11-23 14:35:21,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6650326797385621 [2023-11-23 14:35:21,344 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2023-11-23 14:35:21,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2023-11-23 14:35:21,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 14:35:21,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2023-11-23 14:35:21,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 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) [2023-11-23 14:35:21,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 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) [2023-11-23 14:35:21,356 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 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) [2023-11-23 14:35:21,358 INFO L175 Difference]: Start difference. First operand has 181 places, 204 transitions, 415 flow. Second operand 3 states and 407 transitions. [2023-11-23 14:35:21,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 375 transitions, 1491 flow [2023-11-23 14:35:21,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 375 transitions, 1491 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 14:35:21,385 INFO L231 Difference]: Finished difference. Result has 184 places, 202 transitions, 455 flow [2023-11-23 14:35:21,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=455, PETRI_PLACES=184, PETRI_TRANSITIONS=202} [2023-11-23 14:35:21,390 INFO L281 CegarLoopForPetriNet]: 181 programPoint places, 3 predicate places. [2023-11-23 14:35:21,390 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 202 transitions, 455 flow [2023-11-23 14:35:21,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2023-11-23 14:35:21,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 14:35:21,391 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:35:21,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 14:35:21,392 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-23 14:35:21,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:35:21,392 INFO L85 PathProgramCache]: Analyzing trace with hash -103924702, now seen corresponding path program 1 times [2023-11-23 14:35:21,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:35:21,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204346809] [2023-11-23 14:35:21,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:21,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:35:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:35:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 14:35:21,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:35:21,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204346809] [2023-11-23 14:35:21,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204346809] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:35:21,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534929771] [2023-11-23 14:35:21,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:21,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:35:21,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:35:21,512 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) [2023-11-23 14:35:21,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 14:35:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:35:21,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 14:35:21,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:35:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 14:35:21,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:35:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 14:35:21,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534929771] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:35:21,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:35:21,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-23 14:35:21,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157505349] [2023-11-23 14:35:21,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:35:21,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 14:35:21,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:35:21,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 14:35:21,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-23 14:35:21,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 204 [2023-11-23 14:35:21,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 202 transitions, 455 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 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) [2023-11-23 14:35:21,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 14:35:21,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 204 [2023-11-23 14:35:21,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 14:35:21,885 INFO L124 PetriNetUnfolderBase]: 37/112 cut-off events. [2023-11-23 14:35:21,886 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-23 14:35:21,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 112 events. 37/112 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 291 event pairs, 0 based on Foata normal form. 19/125 useless extension candidates. Maximal degree in co-relation 198. Up to 67 conditions per place. [2023-11-23 14:35:21,888 INFO L140 encePairwiseOnDemand]: 199/204 looper letters, 42 selfloop transitions, 7 changer transitions 0/50 dead transitions. [2023-11-23 14:35:21,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 50 transitions, 222 flow [2023-11-23 14:35:21,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 14:35:21,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 14:35:21,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2023-11-23 14:35:21,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.08251633986928104 [2023-11-23 14:35:21,891 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 101 transitions. [2023-11-23 14:35:21,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 101 transitions. [2023-11-23 14:35:21,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 14:35:21,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 101 transitions. [2023-11-23 14:35:21,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 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) [2023-11-23 14:35:21,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 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) [2023-11-23 14:35:21,895 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 204.0) internal successors, (1428), 7 states have internal predecessors, (1428), 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) [2023-11-23 14:35:21,896 INFO L175 Difference]: Start difference. First operand has 184 places, 202 transitions, 455 flow. Second operand 6 states and 101 transitions. [2023-11-23 14:35:21,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 50 transitions, 222 flow [2023-11-23 14:35:21,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 50 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 14:35:21,899 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 100 flow [2023-11-23 14:35:21,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-11-23 14:35:21,900 INFO L281 CegarLoopForPetriNet]: 181 programPoint places, -146 predicate places. [2023-11-23 14:35:21,900 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 100 flow [2023-11-23 14:35:21,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 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) [2023-11-23 14:35:21,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 14:35:21,901 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:35:21,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 14:35:22,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:35:22,117 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-23 14:35:22,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:35:22,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1216130342, now seen corresponding path program 2 times [2023-11-23 14:35:22,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:35:22,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642328161] [2023-11-23 14:35:22,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:22,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:35:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 14:35:22,170 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 14:35:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 14:35:22,223 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 14:35:22,223 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 14:35:22,224 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-23 14:35:22,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-23 14:35:22,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-23 14:35:22,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-23 14:35:22,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-23 14:35:22,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-23 14:35:22,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 14:35:22,227 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-11-23 14:35:22,229 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-23 14:35:22,230 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-23 14:35:22,323 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-23 14:35:22,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 223 transitions, 462 flow [2023-11-23 14:35:22,402 INFO L124 PetriNetUnfolderBase]: 76/587 cut-off events. [2023-11-23 14:35:22,402 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-23 14:35:22,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 587 events. 76/587 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3263 event pairs, 0 based on Foata normal form. 0/491 useless extension candidates. Maximal degree in co-relation 381. Up to 8 conditions per place. [2023-11-23 14:35:22,405 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 223 transitions, 462 flow [2023-11-23 14:35:22,408 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 223 transitions, 462 flow [2023-11-23 14:35:22,409 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 14:35:22,410 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=true, 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;@3cb45024, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 14:35:22,410 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-23 14:35:22,419 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 14:35:22,419 INFO L124 PetriNetUnfolderBase]: 3/57 cut-off events. [2023-11-23 14:35:22,419 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 14:35:22,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 14:35:22,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:35:22,420 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-23 14:35:22,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:35:22,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1983923221, now seen corresponding path program 1 times [2023-11-23 14:35:22,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:35:22,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819353840] [2023-11-23 14:35:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:35:22,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:35:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:35:22,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:35:22,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:35:22,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819353840] [2023-11-23 14:35:22,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819353840] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:35:22,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:35:22,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 14:35:22,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374450296] [2023-11-23 14:35:22,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:35:22,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 14:35:22,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:35:22,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 14:35:22,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 14:35:22,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 223 [2023-11-23 14:35:22,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 223 transitions, 462 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2023-11-23 14:35:22,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 14:35:22,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 223 [2023-11-23 14:35:22,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand