/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/BuchiAutomizerCInline.xml -s ../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-semanticLbe.epf -i ../../../trunk/examples/svcomp/pthread-atomic/qrcu-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-21b0908 [2022-07-22 12:10:13,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 12:10:13,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 12:10:13,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-07-22 12:10:13,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 12:10:13,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 12:10:13,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 12:10:13,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 12:10:13,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 12:10:13,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 12:10:13,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 12:10:13,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 12:10:13,462 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 12:10:13,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 12:10:13,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 12:10:13,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 12:10:13,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 12:10:13,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-07-22 12:10:13,491 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/buchiAutomizer/concurrent-automaton-semanticLbe.epf [2022-07-22 12:10:13,523 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 12:10:13,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 12:10:13,524 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 12:10:13,524 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 12:10:13,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 12:10:13,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 12:10:13,526 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 12:10:13,527 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-07-22 12:10:13,527 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-07-22 12:10:13,527 INFO L138 SettingsManager]: * Use old map elimination=false [2022-07-22 12:10:13,527 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-07-22 12:10:13,528 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-07-22 12:10:13,528 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-07-22 12:10:13,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 12:10:13,529 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 12:10:13,529 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-22 12:10:13,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 12:10:13,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 12:10:13,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 12:10:13,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-07-22 12:10:13,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-07-22 12:10:13,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-07-22 12:10:13,531 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 12:10:13,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 12:10:13,531 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-07-22 12:10:13,531 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 12:10:13,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-07-22 12:10:13,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 12:10:13,532 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 12:10:13,533 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 12:10:13,533 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 12:10:13,534 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-07-22 12:10:13,534 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-07-22 12:10:13,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 12:10:13,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 12:10:13,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 12:10:13,976 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 12:10:13,977 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 12:10:13,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/qrcu-2.i [2022-07-22 12:10:14,053 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da93bde36/00d40a275f2f4fac8e708d45bca75021/FLAGfad3a3008 [2022-07-22 12:10:14,751 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 12:10:14,752 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/qrcu-2.i [2022-07-22 12:10:14,779 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da93bde36/00d40a275f2f4fac8e708d45bca75021/FLAGfad3a3008 [2022-07-22 12:10:14,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da93bde36/00d40a275f2f4fac8e708d45bca75021 [2022-07-22 12:10:15,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 12:10:15,022 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-07-22 12:10:15,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 12:10:15,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 12:10:15,028 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 12:10:15,029 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:10:14" (1/1) ... [2022-07-22 12:10:15,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77aa762f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:10:15, skipping insertion in model container [2022-07-22 12:10:15,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:10:14" (1/1) ... [2022-07-22 12:10:15,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 12:10:15,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 12:10:15,656 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/qrcu-2.i[30690,30703] [2022-07-22 12:10:15,660 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/qrcu-2.i[30912,30925] [2022-07-22 12:10:15,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:10:15,718 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 12:10:15,787 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/qrcu-2.i[30690,30703] [2022-07-22 12:10:15,788 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/qrcu-2.i[30912,30925] [2022-07-22 12:10:15,802 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:10:15,850 INFO L208 MainTranslator]: Completed translation [2022-07-22 12:10:15,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:10:15 WrapperNode [2022-07-22 12:10:15,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 12:10:15,852 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 12:10:15,853 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 12:10:15,853 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 12:10:15,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:10:15" (1/1) ... [2022-07-22 12:10:15,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:10:15" (1/1) ... [2022-07-22 12:10:15,945 INFO L137 Inliner]: procedures = 177, calls = 44, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 252 [2022-07-22 12:10:15,946 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 12:10:15,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 12:10:15,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 12:10:15,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 12:10:15,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:10:15" (1/1) ... [2022-07-22 12:10:15,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:10:15" (1/1) ... [2022-07-22 12:10:15,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:10:15" (1/1) ... [2022-07-22 12:10:15,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:10:15" (1/1) ... [2022-07-22 12:10:16,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:10:15" (1/1) ... [2022-07-22 12:10:16,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:10:15" (1/1) ... [2022-07-22 12:10:16,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:10:15" (1/1) ... [2022-07-22 12:10:16,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 12:10:16,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 12:10:16,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 12:10:16,017 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 12:10:16,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:10:15" (1/1) ... [2022-07-22 12:10:16,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 12:10:16,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:10:16,073 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 12:10:16,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-07-22 12:10:16,149 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader1 [2022-07-22 12:10:16,150 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader1 [2022-07-22 12:10:16,150 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader2 [2022-07-22 12:10:16,150 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader2 [2022-07-22 12:10:16,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 12:10:16,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 12:10:16,151 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_updater [2022-07-22 12:10:16,151 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_updater [2022-07-22 12:10:16,151 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-22 12:10:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 12:10:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 12:10:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 12:10:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 12:10:16,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 12:10:16,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 12:10:16,155 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 12:10:16,336 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 12:10:16,342 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 12:10:17,013 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 12:10:17,169 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 12:10:17,170 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-22 12:10:17,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:10:17 BoogieIcfgContainer [2022-07-22 12:10:17,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 12:10:17,174 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-07-22 12:10:17,175 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-07-22 12:10:17,179 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-07-22 12:10:17,180 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 12:10:17,181 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.07 12:10:14" (1/3) ... [2022-07-22 12:10:17,182 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2b0027c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.07 12:10:17, skipping insertion in model container [2022-07-22 12:10:17,182 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 12:10:17,182 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:10:15" (2/3) ... [2022-07-22 12:10:17,183 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2b0027c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.07 12:10:17, skipping insertion in model container [2022-07-22 12:10:17,183 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 12:10:17,183 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:10:17" (3/3) ... [2022-07-22 12:10:17,184 INFO L322 chiAutomizerObserver]: Analyzing ICFG qrcu-2.i [2022-07-22 12:10:17,362 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 12:10:17,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 161 places, 172 transitions, 368 flow [2022-07-22 12:10:17,517 INFO L129 PetriNetUnfolder]: 18/166 cut-off events. [2022-07-22 12:10:17,518 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 12:10:17,525 INFO L84 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 166 events. 18/166 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 279 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 120. Up to 4 conditions per place. [2022-07-22 12:10:17,525 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 172 transitions, 368 flow [2022-07-22 12:10:17,537 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 166 transitions, 350 flow [2022-07-22 12:10:17,542 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-07-22 12:10:17,559 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 166 transitions, 350 flow [2022-07-22 12:10:17,562 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 166 transitions, 350 flow [2022-07-22 12:10:17,563 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 158 places, 166 transitions, 350 flow [2022-07-22 12:10:17,601 INFO L129 PetriNetUnfolder]: 18/166 cut-off events. [2022-07-22 12:10:17,601 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 12:10:17,604 INFO L84 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 166 events. 18/166 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 286 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 120. Up to 4 conditions per place. [2022-07-22 12:10:17,612 INFO L116 LiptonReduction]: Number of co-enabled transitions 8034 [2022-07-22 12:10:23,287 INFO L131 LiptonReduction]: Checked pairs total: 17553 [2022-07-22 12:10:23,288 INFO L133 LiptonReduction]: Total number of compositions: 131 [2022-07-22 12:10:23,320 INFO L300 stractBuchiCegarLoop]: Interprodecural is true [2022-07-22 12:10:23,320 INFO L301 stractBuchiCegarLoop]: Hoare is false [2022-07-22 12:10:23,321 INFO L302 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-07-22 12:10:23,321 INFO L303 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-07-22 12:10:23,322 INFO L304 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-07-22 12:10:23,322 INFO L305 stractBuchiCegarLoop]: Difference is false [2022-07-22 12:10:23,322 INFO L306 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-07-22 12:10:23,323 INFO L310 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-07-22 12:10:23,327 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 0 states, but on-demand construction may add more states [2022-07-22 12:10:23,953 INFO L131 ngComponentsAnalysis]: Automaton has 900 accepting balls. 900 [2022-07-22 12:10:23,954 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 12:10:23,954 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 12:10:23,961 INFO L150 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-07-22 12:10:23,961 INFO L151 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2022-07-22 12:10:23,961 INFO L332 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-07-22 12:10:23,961 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 3067 states, but on-demand construction may add more states [2022-07-22 12:10:24,050 INFO L131 ngComponentsAnalysis]: Automaton has 900 accepting balls. 900 [2022-07-22 12:10:24,050 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 12:10:24,050 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 12:10:24,051 INFO L150 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-07-22 12:10:24,051 INFO L151 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2022-07-22 12:10:24,058 INFO L748 eck$LassoCheckResult]: Stem: 164#[ULTIMATE.startENTRY]don't care [967] ULTIMATE.startENTRY-->L784-3: Formula: (let ((.cse2 (store |v_#valid_114| |v_ULTIMATE.start_main_~#t1~0#1.base_37| 1))) (let ((.cse0 (store .cse2 |v_ULTIMATE.start_main_~#t2~0#1.base_39| 1)) (.cse3 (select |v_#memory_int_68| 1)) (.cse1 (select |v_#memory_int_68| |v_~#mutex~0.base_88|))) (and (= 0 (select .cse0 |v_ULTIMATE.start_main_~#t3~0#1.base_41|)) (= |v_ULTIMATE.start_main_~#t2~0#1.offset_31| 0) (< |v_#StackHeapBarrier_25| |v_ULTIMATE.start_main_~#t2~0#1.base_39|) (= |v_#memory_int_67| (store |v_#memory_int_68| |v_ULTIMATE.start_main_~#t1~0#1.base_37| (store (select |v_#memory_int_68| |v_ULTIMATE.start_main_~#t1~0#1.base_37|) |v_ULTIMATE.start_main_~#t1~0#1.offset_31| |v_ULTIMATE.start_main_#t~pre22#1_29|))) (= |v_#pthreadsForks_44| (+ |v_#pthreadsForks_45| 1)) (= (select .cse1 (+ |v_~#mutex~0.offset_88| 4)) 0) (= v_~ctr2~0_449 0) (= v_~readerprogress2~0_117 0) (= (select |v_#length_79| 3) 24) (= (select |v_#valid_114| 1) 1) (< |v_#StackHeapBarrier_25| |v_ULTIMATE.start_main_~#t1~0#1.base_37|) (= (select .cse1 |v_~#mutex~0.offset_88|) 0) (= (select .cse2 |v_ULTIMATE.start_main_~#t2~0#1.base_39|) 0) (= (select .cse1 (+ |v_~#mutex~0.offset_88| 8)) 0) (= (select .cse1 (+ |v_~#mutex~0.offset_88| 12)) 0) (= (select |v_#valid_114| 3) 1) (= (select |v_#length_79| 1) 2) (= |v_#pthreadsMutex_127| (store |v_#pthreadsMutex_128| |v_~#mutex~0.base_88| (store (select |v_#pthreadsMutex_128| |v_~#mutex~0.base_88|) |v_~#mutex~0.offset_88| 0))) (< 0 |v_#StackHeapBarrier_25|) (= (select .cse3 1) 0) (= (select |v_#valid_114| 0) 0) (= (select |v_#valid_114| |v_ULTIMATE.start_main_~#t1~0#1.base_37|) 0) (= (select |v_#valid_114| 2) 1) (= v_~readerprogress1~0_118 0) (= |v_ULTIMATE.start_main_~#t3~0#1.offset_33| 0) (= (store .cse0 |v_ULTIMATE.start_main_~#t3~0#1.base_41| 1) |v_#valid_113|) (= |v_#length_78| (store (store (store |v_#length_79| |v_ULTIMATE.start_main_~#t1~0#1.base_37| 4) |v_ULTIMATE.start_main_~#t2~0#1.base_39| 4) |v_ULTIMATE.start_main_~#t3~0#1.base_41| 4)) (= |v_#NULL.offset_8| 0) (= |v_ULTIMATE.start_main_~#t1~0#1.offset_31| 0) (= v_~ctr1~0_466 1) (= v_~idx~0_126 0) (= 9 (select |v_#length_79| 2)) (< |v_#StackHeapBarrier_25| |v_ULTIMATE.start_main_~#t3~0#1.base_41|) (= |v_~#mutex~0.offset_88| 0) (= |v_#NULL.base_8| 0) (= 3 |v_~#mutex~0.base_88|) (= (select .cse3 0) 48) (= (select .cse1 (+ 16 |v_~#mutex~0.offset_88|)) 0) (= |v_#pthreadsForks_45| |v_ULTIMATE.start_main_#t~pre22#1_29|)))) InVars {#pthreadsMutex=|v_#pthreadsMutex_128|, #StackHeapBarrier=|v_#StackHeapBarrier_25|, #pthreadsForks=|v_#pthreadsForks_45|, #valid=|v_#valid_114|, #memory_int=|v_#memory_int_68|, #length=|v_#length_79|} OutVars{~#mutex~0.base=|v_~#mutex~0.base_88|, ULTIMATE.start_main_#t~pre26#1=|v_ULTIMATE.start_main_#t~pre26#1_27|, ULTIMATE.start_main_~#t2~0#1.offset=|v_ULTIMATE.start_main_~#t2~0#1.offset_31|, ULTIMATE.start_main_~#t3~0#1.offset=|v_ULTIMATE.start_main_~#t3~0#1.offset_33|, ULTIMATE.start_main_#t~mem30#1=|v_ULTIMATE.start_main_#t~mem30#1_26|, ~idx~0=v_~idx~0_126, ULTIMATE.start_main_#t~nondet25#1=|v_ULTIMATE.start_main_#t~nondet25#1_19|, ULTIMATE.start_main_~#t3~0#1.base=|v_ULTIMATE.start_main_~#t3~0#1.base_41|, #NULL.offset=|v_#NULL.offset_8|, ~ctr1~0=v_~ctr1~0_466, ULTIMATE.start_main_~#t1~0#1.offset=|v_ULTIMATE.start_main_~#t1~0#1.offset_31|, ~readerprogress1~0=v_~readerprogress1~0_118, #pthreadsForks=|v_#pthreadsForks_44|, #length=|v_#length_78|, #pthreadsMutex=|v_#pthreadsMutex_127|, ULTIMATE.start_main_#t~nondet23#1=|v_ULTIMATE.start_main_#t~nondet23#1_19|, ULTIMATE.start_main_#res#1=|v_ULTIMATE.start_main_#res#1_26|, ULTIMATE.start_main_#t~pre24#1=|v_ULTIMATE.start_main_#t~pre24#1_29|, ~#mutex~0.offset=|v_~#mutex~0.offset_88|, ULTIMATE.start_main_#t~mem29#1=|v_ULTIMATE.start_main_#t~mem29#1_20|, ~readerprogress2~0=v_~readerprogress2~0_117, ULTIMATE.start_main_~#t1~0#1.base=|v_ULTIMATE.start_main_~#t1~0#1.base_37|, ULTIMATE.start_main_#t~nondet27#1=|v_ULTIMATE.start_main_#t~nondet27#1_17|, ~ctr2~0=v_~ctr2~0_449, #NULL.base=|v_#NULL.base_8|, #StackHeapBarrier=|v_#StackHeapBarrier_25|, #valid=|v_#valid_113|, #memory_int=|v_#memory_int_67|, ULTIMATE.start_main_#t~pre22#1=|v_ULTIMATE.start_main_#t~pre22#1_29|, ULTIMATE.start_main_#t~mem28#1=|v_ULTIMATE.start_main_#t~mem28#1_20|, ULTIMATE.start_main_~#t2~0#1.base=|v_ULTIMATE.start_main_~#t2~0#1.base_39|} AuxVars[] AssignedVars[~#mutex~0.base, ULTIMATE.start_main_#t~pre26#1, ULTIMATE.start_main_~#t2~0#1.offset, ULTIMATE.start_main_~#t3~0#1.offset, ULTIMATE.start_main_#t~mem30#1, ~idx~0, ULTIMATE.start_main_#t~nondet25#1, ULTIMATE.start_main_~#t3~0#1.base, #NULL.offset, ~ctr1~0, ULTIMATE.start_main_~#t1~0#1.offset, ~readerprogress1~0, #pthreadsForks, #length, #pthreadsMutex, ULTIMATE.start_main_#t~nondet23#1, ULTIMATE.start_main_#res#1, ULTIMATE.start_main_#t~pre24#1, ~#mutex~0.offset, ULTIMATE.start_main_#t~mem29#1, ~readerprogress2~0, ULTIMATE.start_main_~#t1~0#1.base, ULTIMATE.start_main_#t~nondet27#1, ~ctr2~0, #NULL.base, #valid, #memory_int, ULTIMATE.start_main_#t~pre22#1, ULTIMATE.start_main_#t~mem28#1, ULTIMATE.start_main_~#t2~0#1.base] 167#[L784-3]don't care [830] L784-3-->qrcu_reader1ENTRY: Formula: (and (= |v_qrcu_reader1Thread1of1ForFork1_#in~arg#1.offset_4| 0) (= v_qrcu_reader1Thread1of1ForFork1_thidvar1_2 0) (= |v_qrcu_reader1Thread1of1ForFork1_#in~arg#1.base_4| 0) (= v_qrcu_reader1Thread1of1ForFork1_thidvar0_2 |v_ULTIMATE.start_main_#t~pre22#1_6|)) InVars {ULTIMATE.start_main_#t~pre22#1=|v_ULTIMATE.start_main_#t~pre22#1_6|} OutVars{qrcu_reader1Thread1of1ForFork1_#t~nondet10#1=|v_qrcu_reader1Thread1of1ForFork1_#t~nondet10#1_10|, qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use_done_#t~post6#1=|v_qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use_done_#t~post6#1_4|, qrcu_reader1Thread1of1ForFork1_#t~nondet9#1=|v_qrcu_reader1Thread1of1ForFork1_#t~nondet9#1_10|, qrcu_reader1Thread1of1ForFork1_thidvar0=v_qrcu_reader1Thread1of1ForFork1_thidvar0_2, qrcu_reader1Thread1of1ForFork1_#in~arg#1.offset=|v_qrcu_reader1Thread1of1ForFork1_#in~arg#1.offset_4|, qrcu_reader1Thread1of1ForFork1_thidvar1=v_qrcu_reader1Thread1of1ForFork1_thidvar1_2, qrcu_reader1Thread1of1ForFork1_#res#1.base=|v_qrcu_reader1Thread1of1ForFork1_#res#1.base_4|, qrcu_reader1Thread1of1ForFork1_assume_abort_if_not_~cond#1=|v_qrcu_reader1Thread1of1ForFork1_assume_abort_if_not_~cond#1_6|, qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use2_#t~post4#1=|v_qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use2_#t~post4#1_4|, qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use_done_#in~myidx#1=|v_qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use_done_#in~myidx#1_4|, qrcu_reader1Thread1of1ForFork1_#res#1.offset=|v_qrcu_reader1Thread1of1ForFork1_#res#1.offset_4|, qrcu_reader1Thread1of1ForFork1_~myidx~0#1=|v_qrcu_reader1Thread1of1ForFork1_~myidx~0#1_12|, qrcu_reader1Thread1of1ForFork1_~arg#1.offset=|v_qrcu_reader1Thread1of1ForFork1_~arg#1.offset_4|, qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use_done_~myidx#1=|v_qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use_done_~myidx#1_4|, qrcu_reader1Thread1of1ForFork1_~arg#1.base=|v_qrcu_reader1Thread1of1ForFork1_~arg#1.base_4|, qrcu_reader1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1=|v_qrcu_reader1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1_6|, qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use_done_#t~post5#1=|v_qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use_done_#t~post5#1_4|, qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use2_#in~myidx#1=|v_qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use2_#in~myidx#1_4|, qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use1_~myidx#1=|v_qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use1_~myidx#1_4|, qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use2_~myidx#1=|v_qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use2_~myidx#1_4|, ULTIMATE.start_main_#t~pre22#1=|v_ULTIMATE.start_main_#t~pre22#1_6|, qrcu_reader1Thread1of1ForFork1_#in~arg#1.base=|v_qrcu_reader1Thread1of1ForFork1_#in~arg#1.base_4|, qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use1_#t~post3#1=|v_qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use1_#t~post3#1_4|, qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use1_#in~myidx#1=|v_qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use1_#in~myidx#1_4|} AuxVars[] AssignedVars[qrcu_reader1Thread1of1ForFork1_#t~nondet10#1, qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use_done_#t~post6#1, qrcu_reader1Thread1of1ForFork1_#t~nondet9#1, qrcu_reader1Thread1of1ForFork1_thidvar0, qrcu_reader1Thread1of1ForFork1_#in~arg#1.offset, qrcu_reader1Thread1of1ForFork1_thidvar1, qrcu_reader1Thread1of1ForFork1_#res#1.base, qrcu_reader1Thread1of1ForFork1_assume_abort_if_not_~cond#1, qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use2_#t~post4#1, qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use_done_#in~myidx#1, qrcu_reader1Thread1of1ForFork1_#res#1.offset, qrcu_reader1Thread1of1ForFork1_~myidx~0#1, qrcu_reader1Thread1of1ForFork1_~arg#1.offset, qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use_done_~myidx#1, qrcu_reader1Thread1of1ForFork1_~arg#1.base, qrcu_reader1Thread1of1ForFork1_assume_abort_if_not_#in~cond#1, qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use_done_#t~post5#1, qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use2_#in~myidx#1, qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use1_~myidx#1, qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use2_~myidx#1, qrcu_reader1Thread1of1ForFork1_#in~arg#1.base, qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use1_#t~post3#1, qrcu_reader1Thread1of1ForFork1___VERIFIER_atomic_use1_#in~myidx#1] 169#[L784-4, qrcu_reader1ENTRY]don't care [885] qrcu_reader1ENTRY-->L725-2: Formula: (and (= |v_qrcu_reader1Thread1of1ForFork1_#in~arg#1.base_5| |v_qrcu_reader1Thread1of1ForFork1_~arg#1.base_5|) (= |v_qrcu_reader1Thread1of1ForFork1_#in~arg#1.offset_5| |v_qrcu_reader1Thread1of1ForFork1_~arg#1.offset_5|)) InVars {qrcu_reader1Thread1of1ForFork1_#in~arg#1.offset=|v_qrcu_reader1Thread1of1ForFork1_#in~arg#1.offset_5|, qrcu_reader1Thread1of1ForFork1_#in~arg#1.base=|v_qrcu_reader1Thread1of1ForFork1_#in~arg#1.base_5|} OutVars{qrcu_reader1Thread1of1ForFork1_#in~arg#1.offset=|v_qrcu_reader1Thread1of1ForFork1_#in~arg#1.offset_5|, qrcu_reader1Thread1of1ForFork1_#in~arg#1.base=|v_qrcu_reader1Thread1of1ForFork1_#in~arg#1.base_5|, qrcu_reader1Thread1of1ForFork1_~myidx~0#1=|v_qrcu_reader1Thread1of1ForFork1_~myidx~0#1_63|, qrcu_reader1Thread1of1ForFork1_~arg#1.offset=|v_qrcu_reader1Thread1of1ForFork1_~arg#1.offset_5|, qrcu_reader1Thread1of1ForFork1_~arg#1.base=|v_qrcu_reader1Thread1of1ForFork1_~arg#1.base_5|} AuxVars[] AssignedVars[qrcu_reader1Thread1of1ForFork1_~myidx~0#1, qrcu_reader1Thread1of1ForFork1_~arg#1.offset, qrcu_reader1Thread1of1ForFork1_~arg#1.base] 173#[L784-4, L725-2]don't care [2022-07-22 12:10:24,062 INFO L750 eck$LassoCheckResult]: Loop: 173#[L784-4, L725-2]don't care [957] L725-2-->L725-2: Formula: (and (= |v_qrcu_reader1Thread1of1ForFork1_#t~nondet9#1_78| 0) (= |v_qrcu_reader1Thread1of1ForFork1_~myidx~0#1_149| v_~idx~0_102) (= |v_qrcu_reader1Thread1of1ForFork1_#t~nondet10#1_58| 0)) InVars {qrcu_reader1Thread1of1ForFork1_#t~nondet10#1=|v_qrcu_reader1Thread1of1ForFork1_#t~nondet10#1_58|, qrcu_reader1Thread1of1ForFork1_#t~nondet9#1=|v_qrcu_reader1Thread1of1ForFork1_#t~nondet9#1_78|, ~idx~0=v_~idx~0_102} OutVars{~idx~0=v_~idx~0_102, qrcu_reader1Thread1of1ForFork1_~myidx~0#1=|v_qrcu_reader1Thread1of1ForFork1_~myidx~0#1_149|} AuxVars[] AssignedVars[qrcu_reader1Thread1of1ForFork1_#t~nondet10#1, qrcu_reader1Thread1of1ForFork1_#t~nondet9#1, qrcu_reader1Thread1of1ForFork1_~myidx~0#1] 173#[L784-4, L725-2]don't care [2022-07-22 12:10:24,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:10:24,071 INFO L85 PathProgramCache]: Analyzing trace with hash 985693, now seen corresponding path program 1 times [2022-07-22 12:10:24,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:10:24,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704707581] [2022-07-22 12:10:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:10:24,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:10:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 12:10:24,245 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 12:10:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 12:10:24,366 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 12:10:24,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:10:24,370 INFO L85 PathProgramCache]: Analyzing trace with hash 988, now seen corresponding path program 1 times [2022-07-22 12:10:24,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:10:24,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631302703] [2022-07-22 12:10:24,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:10:24,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:10:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 12:10:24,409 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 12:10:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 12:10:24,431 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 12:10:24,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:10:24,433 INFO L85 PathProgramCache]: Analyzing trace with hash 30557440, now seen corresponding path program 1 times [2022-07-22 12:10:24,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:10:24,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395983578] [2022-07-22 12:10:24,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:10:24,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:10:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 12:10:24,506 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 12:10:24,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 12:10:24,563 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 12:10:25,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.07 12:10:25 BoogieIcfgContainer [2022-07-22 12:10:25,968 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-07-22 12:10:25,973 INFO L158 Benchmark]: Toolchain (without parser) took 10963.37ms. Allocated memory was 157.3MB in the beginning and 249.6MB in the end (delta: 92.3MB). Free memory was 130.1MB in the beginning and 215.2MB in the end (delta: -85.1MB). Peak memory consumption was 122.1MB. Max. memory is 8.0GB. [2022-07-22 12:10:25,974 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 157.3MB. Free memory is still 129.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-07-22 12:10:25,975 INFO L158 Benchmark]: CACSL2BoogieTranslator took 827.74ms. Allocated memory is still 157.3MB. Free memory was 129.9MB in the beginning and 109.2MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. [2022-07-22 12:10:25,977 INFO L158 Benchmark]: Boogie Procedure Inliner took 93.50ms. Allocated memory is still 157.3MB. Free memory was 109.2MB in the beginning and 106.4MB in the end (delta: 2.8MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-07-22 12:10:25,979 INFO L158 Benchmark]: Boogie Preprocessor took 69.09ms. Allocated memory is still 157.3MB. Free memory was 106.4MB in the beginning and 104.6MB in the end (delta: 1.8MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-07-22 12:10:25,980 INFO L158 Benchmark]: RCFGBuilder took 1156.89ms. Allocated memory is still 157.3MB. Free memory was 104.5MB in the beginning and 118.1MB in the end (delta: -13.5MB). Peak memory consumption was 16.4MB. Max. memory is 8.0GB. [2022-07-22 12:10:25,988 INFO L158 Benchmark]: BuchiAutomizer took 8793.89ms. Allocated memory was 157.3MB in the beginning and 249.6MB in the end (delta: 92.3MB). Free memory was 118.1MB in the beginning and 215.2MB in the end (delta: -97.1MB). Peak memory consumption was 109.9MB. Max. memory is 8.0GB. [2022-07-22 12:10:25,998 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 157.3MB. Free memory is still 129.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 827.74ms. Allocated memory is still 157.3MB. Free memory was 129.9MB in the beginning and 109.2MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 93.50ms. Allocated memory is still 157.3MB. Free memory was 109.2MB in the beginning and 106.4MB in the end (delta: 2.8MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 69.09ms. Allocated memory is still 157.3MB. Free memory was 106.4MB in the beginning and 104.6MB in the end (delta: 1.8MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 1156.89ms. Allocated memory is still 157.3MB. Free memory was 104.5MB in the beginning and 118.1MB in the end (delta: -13.5MB). Peak memory consumption was 16.4MB. Max. memory is 8.0GB. * BuchiAutomizer took 8793.89ms. Allocated memory was 157.3MB in the beginning and 249.6MB in the end (delta: 92.3MB). Free memory was 118.1MB in the beginning and 215.2MB in the end (delta: -97.1MB). Peak memory consumption was 109.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Trivial decomposition into one nonterminating module. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 8.5s and 1 iterations. TraceHistogramMax:1. Analysis of lassos took 1.8s. Construction of modules took 0.0s. Büchi inclusion checks took 0.0s. Highest rank in rank-based complementation 0. Minimization of det autom 0. Minimization of nondet autom 0. Automata minimization No data available. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [0, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: LassoTerminationAnalysisBenchmarks: not availableLassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 0 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 0 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s InitialAbstractionConstructionTime: 5.9s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 725]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {\old(cond)=0, \old(myidx)=0, \old(myidx)=0, \old(myidx)=0, \result={0:0}, \result=0, arg={0:0}, arg={0:0}, cond=0, ctr1=1, ctr2=0, idx=0, mutex={3:0}, myidx=0, myidx=0, myidx=0, myidx=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3e8982ff in0,21000, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6079cfc4 in0,0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6c3c3aef=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@7a6b7707=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@7aaf2584 in0,0, org.eclipse.cdt.internal.core.dom.parser.c.CASTIdExpression@330af5c2=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTIdExpression@45c091a0=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTIdExpression@48dd3d79=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTUnaryExpression@1d4a141f=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTUnaryExpression@34cd3068=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTUnaryExpression@6710b0e6=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTUnaryExpression@758f6d39=0, readerprogress1=0, readerprogress2=0, t1={15785:0}, t2={15786:0}, t3={15787:0}} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 725]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L689] 0 int idx=0; [L690] 0 int ctr1=1, ctr2=0; [L691] 0 int readerprogress1=0, readerprogress2=0; [L692] 0 pthread_mutex_t mutex; [L782] 0 pthread_t t1, t2, t3; [L784] FCALL, FORK 0 pthread_create(&t1, 0, qrcu_reader1, 0) [L724] 1 int myidx; Loop: [L725] COND TRUE 1 [L726] myidx = idx [L727] COND FALSE !(__VERIFIER_nondet_int()) [L731] COND FALSE !(__VERIFIER_nondet_int()) End of lasso representation. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.7s, 158 PlacesBefore, 56 PlacesAfterwards, 166 TransitionsBefore, 60 TransitionsAfterwards, 8034 CoEnabledTransitionPairs, 6 FixpointIterations, 40 TrivialSequentialCompositions, 68 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 19 ConcurrentYvCompositions, 4 ChoiceCompositions, 131 TotalNumberOfCompositions, 17553 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9717, positive: 9419, positive conditional: 0, positive unconditional: 9419, negative: 298, negative conditional: 0, negative unconditional: 298, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 5681, positive: 5571, positive conditional: 0, positive unconditional: 5571, negative: 110, negative conditional: 0, negative unconditional: 110, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 5681, positive: 5544, positive conditional: 0, positive unconditional: 5544, negative: 137, negative conditional: 0, negative unconditional: 137, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 137, positive: 27, positive conditional: 0, positive unconditional: 27, negative: 110, negative conditional: 0, negative unconditional: 110, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 400, positive: 85, positive conditional: 0, positive unconditional: 85, negative: 315, negative conditional: 0, negative unconditional: 315, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 9717, positive: 3848, positive conditional: 0, positive unconditional: 3848, negative: 188, negative conditional: 0, negative unconditional: 188, unknown: 5681, unknown conditional: 0, unknown unconditional: 5681] , Statistics on independence cache: Total cache size (in pairs): 778, Positive cache size: 729, Positive conditional cache size: 0, Positive unconditional cache size: 729, Negative cache size: 49, Negative conditional cache size: 0, Negative unconditional cache size: 49 RESULT: Ultimate proved your program to be incorrect! [2022-07-22 12:10:26,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...