/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 11:56:05,394 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 11:56:05,479 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 11:56:05,484 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 11:56:05,485 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 11:56:05,508 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 11:56:05,509 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 11:56:05,509 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 11:56:05,510 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 11:56:05,513 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 11:56:05,514 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 11:56:05,514 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 11:56:05,514 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 11:56:05,515 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 11:56:05,515 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 11:56:05,516 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 11:56:05,516 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 11:56:05,516 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 11:56:05,517 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 11:56:05,517 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 11:56:05,517 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 11:56:05,518 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 11:56:05,518 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 11:56:05,518 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 11:56:05,519 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 11:56:05,519 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 11:56:05,519 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 11:56:05,519 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 11:56:05,520 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 11:56:05,520 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 11:56:05,521 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 11:56:05,521 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 11:56:05,521 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 11:56:05,521 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 11:56:05,521 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 11:56:05,522 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 11:56:05,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 11:56:05,860 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 11:56:05,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 11:56:05,863 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 11:56:05,863 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 11:56:05,865 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i [2023-08-24 11:56:07,105 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 11:56:07,489 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 11:56:07,489 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/workstealqueue_mutex-2.i [2023-08-24 11:56:07,512 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/badcde44c/8b8a0ab0f7784d2f9d4987cc4764cff3/FLAG06a07448b [2023-08-24 11:56:07,531 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/badcde44c/8b8a0ab0f7784d2f9d4987cc4764cff3 [2023-08-24 11:56:07,536 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 11:56:07,537 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 11:56:07,539 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 11:56:07,540 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 11:56:07,542 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 11:56:07,543 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 11:56:07" (1/1) ... [2023-08-24 11:56:07,544 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@310f5139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:56:07, skipping insertion in model container [2023-08-24 11:56:07,545 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 11:56:07" (1/1) ... [2023-08-24 11:56:07,625 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 11:56:08,226 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] [2023-08-24 11:56:08,275 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] [2023-08-24 11:56:08,284 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] [2023-08-24 11:56:08,296 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 11:56:08,311 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 11:56:08,332 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [127] [2023-08-24 11:56:08,348 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [524] [2023-08-24 11:56:08,348 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [525] [2023-08-24 11:56:08,378 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] [2023-08-24 11:56:08,378 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1797] [2023-08-24 11:56:08,379 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1798] [2023-08-24 11:56:08,379 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1799] [2023-08-24 11:56:08,379 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1800] [2023-08-24 11:56:08,379 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1802] [2023-08-24 11:56:08,380 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1805] [2023-08-24 11:56:08,380 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1805] [2023-08-24 11:56:08,380 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1805] [2023-08-24 11:56:08,380 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1807] [2023-08-24 11:56:08,381 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1812] [2023-08-24 11:56:08,381 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1812] [2023-08-24 11:56:08,381 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1812] [2023-08-24 11:56:08,382 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1825] [2023-08-24 11:56:08,382 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1825] [2023-08-24 11:56:08,383 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1826] [2023-08-24 11:56:08,384 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1830] [2023-08-24 11:56:08,384 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1830] [2023-08-24 11:56:08,385 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1833] [2023-08-24 11:56:08,387 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1845] [2023-08-24 11:56:08,387 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1848] [2023-08-24 11:56:08,389 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1861] [2023-08-24 11:56:08,390 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1864] [2023-08-24 11:56:08,392 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1880] [2023-08-24 11:56:08,393 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1883] [2023-08-24 11:56:08,394 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1893] [2023-08-24 11:56:08,394 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1894] [2023-08-24 11:56:08,395 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1899] [2023-08-24 11:56:08,396 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] [2023-08-24 11:56:08,399 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1902] [2023-08-24 11:56:08,399 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1904] [2023-08-24 11:56:08,401 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] [2023-08-24 11:56:08,402 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1915] [2023-08-24 11:56:08,402 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1916] [2023-08-24 11:56:08,403 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1922] [2023-08-24 11:56:08,404 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: long [1926] [2023-08-24 11:56:08,410 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 11:56:08,554 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 11:56:08,554 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 11:56:08,560 INFO L206 MainTranslator]: Completed translation [2023-08-24 11:56:08,561 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:56:08 WrapperNode [2023-08-24 11:56:08,561 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 11:56:08,562 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 11:56:08,562 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 11:56:08,562 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 11:56:08,568 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:56:08" (1/1) ... [2023-08-24 11:56:08,616 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:56:08" (1/1) ... [2023-08-24 11:56:08,686 INFO L138 Inliner]: procedures = 489, calls = 127, calls flagged for inlining = 45, calls inlined = 117, statements flattened = 1844 [2023-08-24 11:56:08,687 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 11:56:08,687 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 11:56:08,687 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 11:56:08,687 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 11:56:08,695 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:56:08" (1/1) ... [2023-08-24 11:56:08,696 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:56:08" (1/1) ... [2023-08-24 11:56:08,706 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:56:08" (1/1) ... [2023-08-24 11:56:08,707 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:56:08" (1/1) ... [2023-08-24 11:56:08,754 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:56:08" (1/1) ... [2023-08-24 11:56:08,765 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:56:08" (1/1) ... [2023-08-24 11:56:08,773 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:56:08" (1/1) ... [2023-08-24 11:56:08,787 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:56:08" (1/1) ... [2023-08-24 11:56:08,807 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 11:56:08,808 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 11:56:08,808 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 11:56:08,808 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 11:56:08,809 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:56:08" (1/1) ... [2023-08-24 11:56:08,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 11:56:08,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:56:08,850 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) [2023-08-24 11:56:08,854 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 [2023-08-24 11:56:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure Stealer [2023-08-24 11:56:08,884 INFO L138 BoogieDeclarations]: Found implementation of procedure Stealer [2023-08-24 11:56:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 11:56:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 11:56:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 11:56:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 11:56:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 11:56:08,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 11:56:08,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-24 11:56:08,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 11:56:08,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 11:56:08,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 11:56:08,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-24 11:56:08,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 11:56:08,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 11:56:08,887 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 11:56:09,207 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 11:56:09,209 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 11:56:10,758 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 11:56:11,105 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 11:56:11,105 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-24 11:56:11,109 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 11:56:11 BoogieIcfgContainer [2023-08-24 11:56:11,109 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 11:56:11,111 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 11:56:11,112 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 11:56:11,115 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 11:56:11,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 11:56:07" (1/3) ... [2023-08-24 11:56:11,115 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f9b0f9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 11:56:11, skipping insertion in model container [2023-08-24 11:56:11,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:56:08" (2/3) ... [2023-08-24 11:56:11,115 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f9b0f9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 11:56:11, skipping insertion in model container [2023-08-24 11:56:11,116 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 11:56:11" (3/3) ... [2023-08-24 11:56:11,117 INFO L112 eAbstractionObserver]: Analyzing ICFG workstealqueue_mutex-2.i [2023-08-24 11:56:11,132 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 11:56:11,132 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-08-24 11:56:11,133 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 11:56:11,345 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 11:56:11,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1525 places, 1592 transitions, 3192 flow [2023-08-24 11:56:12,155 INFO L124 PetriNetUnfolderBase]: 131/2960 cut-off events. [2023-08-24 11:56:12,156 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 11:56:12,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2966 conditions, 2960 events. 131/2960 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 14226 event pairs, 0 based on Foata normal form. 0/2816 useless extension candidates. Maximal degree in co-relation 1514. Up to 6 conditions per place. [2023-08-24 11:56:12,203 INFO L82 GeneralOperation]: Start removeDead. Operand has 1525 places, 1592 transitions, 3192 flow [2023-08-24 11:56:12,225 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1525 places, 1592 transitions, 3192 flow [2023-08-24 11:56:12,229 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 11:56:12,239 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1525 places, 1592 transitions, 3192 flow [2023-08-24 11:56:12,242 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1525 places, 1592 transitions, 3192 flow [2023-08-24 11:56:12,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1525 places, 1592 transitions, 3192 flow [2023-08-24 11:56:12,954 INFO L124 PetriNetUnfolderBase]: 131/2960 cut-off events. [2023-08-24 11:56:12,955 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 11:56:12,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2966 conditions, 2960 events. 131/2960 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 14226 event pairs, 0 based on Foata normal form. 0/2816 useless extension candidates. Maximal degree in co-relation 1514. Up to 6 conditions per place. [2023-08-24 11:56:13,122 INFO L119 LiptonReduction]: Number of co-enabled transitions 387468 [2023-08-24 11:57:24,150 WARN L234 SmtUtils]: Spent 7.19s on a formula simplification. DAG size of input: 238 DAG size of output: 229 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-24 11:57:32,917 WARN L234 SmtUtils]: Spent 5.09s on a formula simplification. DAG size of input: 238 DAG size of output: 229 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-24 11:57:36,435 INFO L134 LiptonReduction]: Checked pairs total: 463034 [2023-08-24 11:57:36,435 INFO L136 LiptonReduction]: Total number of compositions: 1507 [2023-08-24 11:57:36,447 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 11:57:36,451 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@20088e76, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 11:57:36,451 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-24 11:57:36,455 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 11:57:36,455 INFO L124 PetriNetUnfolderBase]: 2/27 cut-off events. [2023-08-24 11:57:36,456 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:57:36,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:57:36,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:57:36,457 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 11:57:36,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:57:36,461 INFO L85 PathProgramCache]: Analyzing trace with hash -161967912, now seen corresponding path program 1 times [2023-08-24 11:57:36,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:57:36,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989040111] [2023-08-24 11:57:36,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:57:36,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:57:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:57:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:57:36,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:57:36,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989040111] [2023-08-24 11:57:36,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989040111] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:57:36,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:57:36,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 11:57:36,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415270716] [2023-08-24 11:57:36,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:57:36,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 11:57:36,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:57:36,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 11:57:36,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 11:57:36,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1481 out of 3099 [2023-08-24 11:57:36,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 309 transitions, 626 flow. Second operand has 3 states, 3 states have (on average 1483.3333333333333) internal successors, (4450), 3 states have internal predecessors, (4450), 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) [2023-08-24 11:57:36,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:57:36,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1481 of 3099 [2023-08-24 11:57:36,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:57:40,968 INFO L124 PetriNetUnfolderBase]: 14130/25086 cut-off events. [2023-08-24 11:57:40,968 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 11:57:40,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50130 conditions, 25086 events. 14130/25086 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 152364 event pairs, 5198 based on Foata normal form. 48/21133 useless extension candidates. Maximal degree in co-relation 50046. Up to 12567 conditions per place. [2023-08-24 11:57:41,096 INFO L140 encePairwiseOnDemand]: 3083/3099 looper letters, 582 selfloop transitions, 14 changer transitions 6/603 dead transitions. [2023-08-24 11:57:41,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 603 transitions, 2416 flow [2023-08-24 11:57:41,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 11:57:41,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 11:57:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5052 transitions. [2023-08-24 11:57:41,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434010971281058 [2023-08-24 11:57:41,124 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 5052 transitions. [2023-08-24 11:57:41,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 5052 transitions. [2023-08-24 11:57:41,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:57:41,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 5052 transitions. [2023-08-24 11:57:41,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1684.0) internal successors, (5052), 3 states have internal predecessors, (5052), 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) [2023-08-24 11:57:41,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 3099.0) internal successors, (12396), 4 states have internal predecessors, (12396), 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) [2023-08-24 11:57:41,182 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 3099.0) internal successors, (12396), 4 states have internal predecessors, (12396), 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) [2023-08-24 11:57:41,184 INFO L175 Difference]: Start difference. First operand has 263 places, 309 transitions, 626 flow. Second operand 3 states and 5052 transitions. [2023-08-24 11:57:41,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 603 transitions, 2416 flow [2023-08-24 11:57:41,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 603 transitions, 2416 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 11:57:41,206 INFO L231 Difference]: Finished difference. Result has 266 places, 311 transitions, 682 flow [2023-08-24 11:57:41,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3099, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=682, PETRI_PLACES=266, PETRI_TRANSITIONS=311} [2023-08-24 11:57:41,211 INFO L281 CegarLoopForPetriNet]: 263 programPoint places, 3 predicate places. [2023-08-24 11:57:41,211 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 311 transitions, 682 flow [2023-08-24 11:57:41,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1483.3333333333333) internal successors, (4450), 3 states have internal predecessors, (4450), 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) [2023-08-24 11:57:41,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:57:41,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:57:41,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 11:57:41,216 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 11:57:41,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:57:41,217 INFO L85 PathProgramCache]: Analyzing trace with hash 856644935, now seen corresponding path program 1 times [2023-08-24 11:57:41,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:57:41,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397442720] [2023-08-24 11:57:41,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:57:41,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:57:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:57:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 11:57:41,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:57:41,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397442720] [2023-08-24 11:57:41,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397442720] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:57:41,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056392881] [2023-08-24 11:57:41,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:57:41,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:57:41,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:57:41,511 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) [2023-08-24 11:57:41,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 11:57:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:57:41,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 11:57:41,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:57:41,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 11:57:41,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:57:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 11:57:41,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056392881] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:57:41,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:57:41,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 11:57:41,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19576704] [2023-08-24 11:57:41,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:57:41,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 11:57:41,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:57:41,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 11:57:41,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 11:57:41,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1481 out of 3099 [2023-08-24 11:57:41,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 311 transitions, 682 flow. Second operand has 7 states, 7 states have (on average 1486.7142857142858) internal successors, (10407), 7 states have internal predecessors, (10407), 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) [2023-08-24 11:57:41,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:57:41,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1481 of 3099 [2023-08-24 11:57:41,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:57:42,068 INFO L124 PetriNetUnfolderBase]: 59/138 cut-off events. [2023-08-24 11:57:42,068 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-24 11:57:42,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 138 events. 59/138 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 340 event pairs, 0 based on Foata normal form. 27/153 useless extension candidates. Maximal degree in co-relation 306. Up to 103 conditions per place. [2023-08-24 11:57:42,069 INFO L140 encePairwiseOnDemand]: 3094/3099 looper letters, 0 selfloop transitions, 0 changer transitions 65/65 dead transitions. [2023-08-24 11:57:42,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 65 transitions, 283 flow [2023-08-24 11:57:42,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 11:57:42,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 11:57:42,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8955 transitions. [2023-08-24 11:57:42,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48160696999031943 [2023-08-24 11:57:42,092 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 8955 transitions. [2023-08-24 11:57:42,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 8955 transitions. [2023-08-24 11:57:42,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:57:42,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 8955 transitions. [2023-08-24 11:57:42,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 1492.5) internal successors, (8955), 6 states have internal predecessors, (8955), 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) [2023-08-24 11:57:42,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 3099.0) internal successors, (21693), 7 states have internal predecessors, (21693), 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) [2023-08-24 11:57:42,149 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 3099.0) internal successors, (21693), 7 states have internal predecessors, (21693), 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) [2023-08-24 11:57:42,149 INFO L175 Difference]: Start difference. First operand has 266 places, 311 transitions, 682 flow. Second operand 6 states and 8955 transitions. [2023-08-24 11:57:42,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 65 transitions, 283 flow [2023-08-24 11:57:42,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 65 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 11:57:42,151 INFO L231 Difference]: Finished difference. Result has 38 places, 0 transitions, 0 flow [2023-08-24 11:57:42,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3099, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=38, PETRI_TRANSITIONS=0} [2023-08-24 11:57:42,151 INFO L281 CegarLoopForPetriNet]: 263 programPoint places, -225 predicate places. [2023-08-24 11:57:42,152 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 0 transitions, 0 flow [2023-08-24 11:57:42,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1486.7142857142858) internal successors, (10407), 7 states have internal predecessors, (10407), 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) [2023-08-24 11:57:42,156 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2023-08-24 11:57:42,157 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-08-24 11:57:42,157 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-08-24 11:57:42,157 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-08-24 11:57:42,157 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-08-24 11:57:42,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 11:57:42,363 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 [2023-08-24 11:57:42,364 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 11:57:42,366 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-24 11:57:42,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1525 places, 1592 transitions, 3192 flow [2023-08-24 11:57:42,882 INFO L124 PetriNetUnfolderBase]: 131/2960 cut-off events. [2023-08-24 11:57:42,883 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 11:57:42,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2966 conditions, 2960 events. 131/2960 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 14226 event pairs, 0 based on Foata normal form. 0/2816 useless extension candidates. Maximal degree in co-relation 1514. Up to 6 conditions per place. [2023-08-24 11:57:42,931 INFO L82 GeneralOperation]: Start removeDead. Operand has 1525 places, 1592 transitions, 3192 flow [2023-08-24 11:57:42,944 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1521 places, 1587 transitions, 3179 flow [2023-08-24 11:57:42,944 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 11:57:42,944 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1521 places, 1587 transitions, 3179 flow [2023-08-24 11:57:42,944 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1521 places, 1587 transitions, 3179 flow [2023-08-24 11:57:42,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1521 places, 1587 transitions, 3179 flow [2023-08-24 11:57:43,450 INFO L124 PetriNetUnfolderBase]: 130/2955 cut-off events. [2023-08-24 11:57:43,451 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:57:43,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2960 conditions, 2955 events. 130/2955 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 14162 event pairs, 0 based on Foata normal form. 0/2811 useless extension candidates. Maximal degree in co-relation 1514. Up to 6 conditions per place. [2023-08-24 11:57:43,577 INFO L119 LiptonReduction]: Number of co-enabled transitions 387468 [2023-08-24 11:58:57,503 WARN L234 SmtUtils]: Spent 6.82s on a formula simplification. DAG size of input: 229 DAG size of output: 218 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-24 11:59:07,989 WARN L234 SmtUtils]: Spent 6.95s on a formula simplification. DAG size of input: 229 DAG size of output: 218 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-24 11:59:11,631 INFO L134 LiptonReduction]: Checked pairs total: 459384 [2023-08-24 11:59:11,631 INFO L136 LiptonReduction]: Total number of compositions: 1496 [2023-08-24 11:59:11,634 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 11:59:11,634 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@20088e76, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 11:59:11,634 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 11:59:11,638 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 11:59:11,638 INFO L124 PetriNetUnfolderBase]: 2/24 cut-off events. [2023-08-24 11:59:11,638 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:59:11,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:59:11,638 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-24 11:59:11,638 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:59:11,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:59:11,639 INFO L85 PathProgramCache]: Analyzing trace with hash -2145419220, now seen corresponding path program 1 times [2023-08-24 11:59:11,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:59:11,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378358098] [2023-08-24 11:59:11,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:59:11,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:59:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:59:11,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:59:11,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:59:11,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378358098] [2023-08-24 11:59:11,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378358098] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:59:11,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:59:11,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 11:59:11,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068510203] [2023-08-24 11:59:11,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:59:11,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 11:59:11,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:59:11,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 11:59:11,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 11:59:11,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1481 out of 3088 [2023-08-24 11:59:11,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 306 transitions, 617 flow. Second operand has 3 states, 3 states have (on average 1482.6666666666667) internal successors, (4448), 3 states have internal predecessors, (4448), 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) [2023-08-24 11:59:11,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:59:11,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1481 of 3088 [2023-08-24 11:59:11,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:59:14,822 INFO L124 PetriNetUnfolderBase]: 14054/25026 cut-off events. [2023-08-24 11:59:14,822 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:59:14,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49913 conditions, 25026 events. 14054/25026 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 152376 event pairs, 5175 based on Foata normal form. 48/21129 useless extension candidates. Maximal degree in co-relation 49848. Up to 12513 conditions per place. [2023-08-24 11:59:14,856 INFO L140 encePairwiseOnDemand]: 3075/3088 looper letters, 58 selfloop transitions, 4 changer transitions 528/591 dead transitions. [2023-08-24 11:59:14,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 591 transitions, 2361 flow [2023-08-24 11:59:14,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 11:59:14,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 11:59:14,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5038 transitions. [2023-08-24 11:59:14,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.543825561312608 [2023-08-24 11:59:14,867 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 5038 transitions. [2023-08-24 11:59:14,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 5038 transitions. [2023-08-24 11:59:14,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:59:14,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 5038 transitions. [2023-08-24 11:59:14,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1679.3333333333333) internal successors, (5038), 3 states have internal predecessors, (5038), 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) [2023-08-24 11:59:14,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 3088.0) internal successors, (12352), 4 states have internal predecessors, (12352), 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) [2023-08-24 11:59:14,891 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 3088.0) internal successors, (12352), 4 states have internal predecessors, (12352), 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) [2023-08-24 11:59:14,892 INFO L175 Difference]: Start difference. First operand has 262 places, 306 transitions, 617 flow. Second operand 3 states and 5038 transitions. [2023-08-24 11:59:14,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 591 transitions, 2361 flow [2023-08-24 11:59:14,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 591 transitions, 2361 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 11:59:14,897 INFO L231 Difference]: Finished difference. Result has 262 places, 35 transitions, 89 flow [2023-08-24 11:59:14,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3088, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=262, PETRI_TRANSITIONS=35} [2023-08-24 11:59:14,899 INFO L281 CegarLoopForPetriNet]: 262 programPoint places, 0 predicate places. [2023-08-24 11:59:14,899 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 35 transitions, 89 flow [2023-08-24 11:59:14,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1482.6666666666667) internal successors, (4448), 3 states have internal predecessors, (4448), 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) [2023-08-24 11:59:14,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:59:14,900 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-24 11:59:14,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 11:59:14,900 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:59:14,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:59:14,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2095871478, now seen corresponding path program 1 times [2023-08-24 11:59:14,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:59:14,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032358142] [2023-08-24 11:59:14,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:59:14,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:59:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:59:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:59:14,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:59:14,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032358142] [2023-08-24 11:59:14,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032358142] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:59:14,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179157254] [2023-08-24 11:59:14,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:59:14,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:59:14,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:59:14,985 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 11:59:15,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 11:59:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:59:15,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 11:59:15,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:59:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:59:15,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:59:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:59:15,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179157254] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:59:15,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:59:15,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 11:59:15,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466679407] [2023-08-24 11:59:15,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:59:15,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 11:59:15,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:59:15,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 11:59:15,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 11:59:15,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1481 out of 3088 [2023-08-24 11:59:15,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 35 transitions, 89 flow. Second operand has 7 states, 7 states have (on average 1482.5714285714287) internal successors, (10378), 7 states have internal predecessors, (10378), 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) [2023-08-24 11:59:15,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:59:15,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1481 of 3088 [2023-08-24 11:59:15,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:59:15,358 INFO L124 PetriNetUnfolderBase]: 59/162 cut-off events. [2023-08-24 11:59:15,359 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-24 11:59:15,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 162 events. 59/162 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 479 event pairs, 0 based on Foata normal form. 3/153 useless extension candidates. Maximal degree in co-relation 306. Up to 103 conditions per place. [2023-08-24 11:59:15,360 INFO L140 encePairwiseOnDemand]: 3084/3088 looper letters, 58 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2023-08-24 11:59:15,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 66 transitions, 287 flow [2023-08-24 11:59:15,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 11:59:15,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 11:59:15,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8954 transitions. [2023-08-24 11:59:15,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4832685664939551 [2023-08-24 11:59:15,378 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 8954 transitions. [2023-08-24 11:59:15,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 8954 transitions. [2023-08-24 11:59:15,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:59:15,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 8954 transitions. [2023-08-24 11:59:15,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 1492.3333333333333) internal successors, (8954), 6 states have internal predecessors, (8954), 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) [2023-08-24 11:59:15,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 3088.0) internal successors, (21616), 7 states have internal predecessors, (21616), 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) [2023-08-24 11:59:15,421 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 3088.0) internal successors, (21616), 7 states have internal predecessors, (21616), 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) [2023-08-24 11:59:15,422 INFO L175 Difference]: Start difference. First operand has 262 places, 35 transitions, 89 flow. Second operand 6 states and 8954 transitions. [2023-08-24 11:59:15,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 66 transitions, 287 flow [2023-08-24 11:59:15,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 66 transitions, 283 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 11:59:15,423 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 113 flow [2023-08-24 11:59:15,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3088, PETRI_DIFFERENCE_MINUEND_FLOW=85, 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=113, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-08-24 11:59:15,424 INFO L281 CegarLoopForPetriNet]: 262 programPoint places, -223 predicate places. [2023-08-24 11:59:15,424 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 113 flow [2023-08-24 11:59:15,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1482.5714285714287) internal successors, (10378), 7 states have internal predecessors, (10378), 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) [2023-08-24 11:59:15,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:59:15,426 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-24 11:59:15,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 11:59:15,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-24 11:59:15,633 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:59:15,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:59:15,633 INFO L85 PathProgramCache]: Analyzing trace with hash -963403092, now seen corresponding path program 2 times [2023-08-24 11:59:15,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:59:15,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504274219] [2023-08-24 11:59:15,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:59:15,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:59:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 11:59:15,747 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 11:59:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 11:59:15,839 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 11:59:15,839 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 11:59:15,839 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 11:59:15,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 11:59:15,839 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-08-24 11:59:15,840 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 11:59:15,840 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 11:59:15,840 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 11:59:15,928 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 11:59:15,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1663 places, 1735 transitions, 3488 flow [2023-08-24 11:59:16,814 INFO L124 PetriNetUnfolderBase]: 204/4514 cut-off events. [2023-08-24 11:59:16,814 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 11:59:16,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4528 conditions, 4514 events. 204/4514 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 26813 event pairs, 0 based on Foata normal form. 0/4290 useless extension candidates. Maximal degree in co-relation 2962. Up to 9 conditions per place. [2023-08-24 11:59:16,891 INFO L82 GeneralOperation]: Start removeDead. Operand has 1663 places, 1735 transitions, 3488 flow [2023-08-24 11:59:16,910 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1663 places, 1735 transitions, 3488 flow [2023-08-24 11:59:16,910 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 11:59:16,910 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1663 places, 1735 transitions, 3488 flow [2023-08-24 11:59:16,910 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1663 places, 1735 transitions, 3488 flow [2023-08-24 11:59:16,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1663 places, 1735 transitions, 3488 flow [2023-08-24 11:59:17,886 INFO L124 PetriNetUnfolderBase]: 204/4514 cut-off events. [2023-08-24 11:59:17,887 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 11:59:17,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4528 conditions, 4514 events. 204/4514 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 26813 event pairs, 0 based on Foata normal form. 0/4290 useless extension candidates. Maximal degree in co-relation 2962. Up to 9 conditions per place. [2023-08-24 11:59:18,148 INFO L119 LiptonReduction]: Number of co-enabled transitions 817800 [2023-08-24 12:00:41,540 WARN L234 SmtUtils]: Spent 7.05s on a formula simplification. DAG size of input: 229 DAG size of output: 218 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-24 12:00:52,815 WARN L234 SmtUtils]: Spent 8.49s on a formula simplification. DAG size of input: 229 DAG size of output: 218 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-08-24 12:00:56,737 INFO L134 LiptonReduction]: Checked pairs total: 993146 [2023-08-24 12:00:56,737 INFO L136 LiptonReduction]: Total number of compositions: 1625 [2023-08-24 12:00:56,739 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:00:56,740 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@20088e76, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:00:56,740 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-24 12:00:56,745 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:00:56,746 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2023-08-24 12:00:56,746 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:00:56,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:00:56,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:00:56,746 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 12:00:56,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:00:56,746 INFO L85 PathProgramCache]: Analyzing trace with hash -141982463, now seen corresponding path program 1 times [2023-08-24 12:00:56,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:00:56,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046156377] [2023-08-24 12:00:56,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:00:56,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:00:56,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:00:56,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:00:56,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:00:56,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046156377] [2023-08-24 12:00:56,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046156377] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:00:56,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:00:56,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:00:56,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344476063] [2023-08-24 12:00:56,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:00:56,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:00:56,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:00:56,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:00:56,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:00:56,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1617 out of 3360 [2023-08-24 12:00:56,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 346 transitions, 710 flow. Second operand has 3 states, 3 states have (on average 1619.3333333333333) internal successors, (4858), 3 states have internal predecessors, (4858), 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) [2023-08-24 12:00:56,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:00:56,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1617 of 3360 [2023-08-24 12:00:56,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:02:32,389 INFO L124 PetriNetUnfolderBase]: 685352/972734 cut-off events. [2023-08-24 12:02:32,389 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2023-08-24 12:02:33,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1941799 conditions, 972734 events. 685352/972734 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 4261. Compared 7016805 event pairs, 265737 based on Foata normal form. 2500/813660 useless extension candidates. Maximal degree in co-relation 1876115. Up to 487132 conditions per place. [2023-08-24 12:02:37,584 INFO L140 encePairwiseOnDemand]: 3343/3360 looper letters, 648 selfloop transitions, 14 changer transitions 6/673 dead transitions. [2023-08-24 12:02:37,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 673 transitions, 2704 flow [2023-08-24 12:02:37,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:02:37,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:02:37,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5528 transitions. [2023-08-24 12:02:37,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5484126984126985 [2023-08-24 12:02:37,621 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 5528 transitions. [2023-08-24 12:02:37,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 5528 transitions. [2023-08-24 12:02:37,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:02:37,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 5528 transitions. [2023-08-24 12:02:37,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 1842.6666666666667) internal successors, (5528), 3 states have internal predecessors, (5528), 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) [2023-08-24 12:02:37,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 3360.0) internal successors, (13440), 4 states have internal predecessors, (13440), 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) [2023-08-24 12:02:37,674 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 3360.0) internal successors, (13440), 4 states have internal predecessors, (13440), 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) [2023-08-24 12:02:37,674 INFO L175 Difference]: Start difference. First operand has 294 places, 346 transitions, 710 flow. Second operand 3 states and 5528 transitions. [2023-08-24 12:02:37,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 673 transitions, 2704 flow [2023-08-24 12:02:37,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 673 transitions, 2704 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:02:37,698 INFO L231 Difference]: Finished difference. Result has 297 places, 348 transitions, 768 flow [2023-08-24 12:02:37,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=3360, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=768, PETRI_PLACES=297, PETRI_TRANSITIONS=348} [2023-08-24 12:02:37,699 INFO L281 CegarLoopForPetriNet]: 294 programPoint places, 3 predicate places. [2023-08-24 12:02:37,699 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 348 transitions, 768 flow [2023-08-24 12:02:37,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1619.3333333333333) internal successors, (4858), 3 states have internal predecessors, (4858), 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) [2023-08-24 12:02:37,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:02:37,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:02:37,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 12:02:37,701 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-08-24 12:02:37,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:02:37,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1664118496, now seen corresponding path program 1 times [2023-08-24 12:02:37,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:02:37,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711597007] [2023-08-24 12:02:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:02:37,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:02:37,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:02:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 12:02:38,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:02:38,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711597007] [2023-08-24 12:02:38,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711597007] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:02:38,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576119597] [2023-08-24 12:02:38,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:02:38,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:02:38,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:02:38,036 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 12:02:38,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 12:02:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:02:38,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:02:38,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:02:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 12:02:38,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:02:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 12:02:38,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576119597] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:02:38,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:02:38,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:02:38,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463495109] [2023-08-24 12:02:38,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:02:38,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:02:38,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:02:38,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:02:38,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:02:38,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1617 out of 3360 [2023-08-24 12:02:38,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 348 transitions, 768 flow. Second operand has 7 states, 7 states have (on average 1622.7142857142858) internal successors, (11359), 7 states have internal predecessors, (11359), 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) [2023-08-24 12:02:38,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:02:38,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1617 of 3360 [2023-08-24 12:02:38,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand