/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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-21b0908 [2022-07-22 12:10:13,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 12:10:13,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 12:10:13,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-07-22 12:10:13,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 12:10:13,391 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 12:10:13,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 12:10:13,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 12:10:13,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 12:10:13,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 12:10:13,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 12:10:13,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 12:10:13,418 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 12:10:13,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 12:10:13,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 12:10:13,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 12:10:13,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 12:10:13,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-07-22 12:10:13,471 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 12:10:13,510 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 12:10:13,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 12:10:13,511 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 12:10:13,511 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 12:10:13,512 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 12:10:13,513 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 12:10:13,513 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 12:10:13,513 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-07-22 12:10:13,514 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-07-22 12:10:13,514 INFO L138 SettingsManager]: * Use old map elimination=false [2022-07-22 12:10:13,514 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-07-22 12:10:13,514 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-07-22 12:10:13,514 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-07-22 12:10:13,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 12:10:13,515 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 12:10:13,515 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-22 12:10:13,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 12:10:13,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 12:10:13,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 12:10:13,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-07-22 12:10:13,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-07-22 12:10:13,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-07-22 12:10:13,517 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 12:10:13,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 12:10:13,517 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-07-22 12:10:13,518 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 12:10:13,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-07-22 12:10:13,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 12:10:13,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 12:10:13,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 12:10:13,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 12:10:13,520 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-07-22 12:10:13,521 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-07-22 12:10:13,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 12:10:13,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 12:10:13,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 12:10:13,979 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 12:10:13,980 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 12:10:13,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/qrcu-1.i [2022-07-22 12:10:14,066 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f93dba2f/6782e52c80d64d26ad9938d5094b29b1/FLAGefc121b89 [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-1.i [2022-07-22 12:10:14,773 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f93dba2f/6782e52c80d64d26ad9938d5094b29b1/FLAGefc121b89 [2022-07-22 12:10:15,046 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f93dba2f/6782e52c80d64d26ad9938d5094b29b1 [2022-07-22 12:10:15,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 12:10:15,056 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-07-22 12:10:15,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 12:10:15,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 12:10:15,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 12:10:15,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:10:15" (1/1) ... [2022-07-22 12:10:15,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@480a8943 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 12:10:15,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:10:15" (1/1) ... [2022-07-22 12:10:15,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 12:10:15,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 12:10:15,670 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-1.i[30694,30707] [2022-07-22 12:10:15,673 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-1.i[30916,30929] [2022-07-22 12:10:15,711 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:10:15,731 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 12:10:15,805 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-1.i[30694,30707] [2022-07-22 12:10:15,808 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-1.i[30916,30929] [2022-07-22 12:10:15,834 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:10:15,883 INFO L208 MainTranslator]: Completed translation [2022-07-22 12:10:15,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:10:15 WrapperNode [2022-07-22 12:10:15,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 12:10:15,885 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 12:10:15,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 12:10:15,885 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 12:10:15,895 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 12:10:15,914 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 12:10:15,953 INFO L137 Inliner]: procedures = 177, calls = 54, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 262 [2022-07-22 12:10:15,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 12:10:15,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 12:10:15,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 12:10:15,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 12:10:15,965 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 12:10:15,966 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 12:10:15,970 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 12:10:15,971 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 12:10:15,979 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 12:10:15,986 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 12:10:15,989 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 12:10:15,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 12:10:15,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 12:10:15,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 12:10:15,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 12:10:15,997 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 12:10:16,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 12:10:16,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:10:16,053 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 12:10:16,077 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 12:10:16,191 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader1 [2022-07-22 12:10:16,191 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader1 [2022-07-22 12:10:16,192 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader2 [2022-07-22 12:10:16,192 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader2 [2022-07-22 12:10:16,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 12:10:16,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 12:10:16,194 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_updater [2022-07-22 12:10:16,195 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_updater [2022-07-22 12:10:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-22 12:10:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 12:10:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 12:10:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 12:10:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 12:10:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 12:10:16,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 12:10:16,198 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 12:10:16,438 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 12:10:16,440 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 12:10:16,873 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 12:10:17,065 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 12:10:17,065 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-22 12:10:17,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:10:17 BoogieIcfgContainer [2022-07-22 12:10:17,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 12:10:17,070 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-07-22 12:10:17,070 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-07-22 12:10:17,075 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-07-22 12:10:17,076 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 12:10:17,076 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.07 12:10:15" (1/3) ... [2022-07-22 12:10:17,077 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@66b149cd 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 12:10:17,077 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 12:10:17,078 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 12:10:17,079 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@66b149cd 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 12:10:17,079 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 12:10:17,079 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 12:10:17,081 INFO L322 chiAutomizerObserver]: Analyzing ICFG qrcu-1.i [2022-07-22 12:10:17,207 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 12:10:17,316 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 167 places, 178 transitions, 380 flow [2022-07-22 12:10:17,473 INFO L129 PetriNetUnfolder]: 18/172 cut-off events. [2022-07-22 12:10:17,473 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 12:10:17,491 INFO L84 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 172 events. 18/172 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 314 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 126. Up to 4 conditions per place. [2022-07-22 12:10:17,492 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 178 transitions, 380 flow [2022-07-22 12:10:17,511 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 172 transitions, 362 flow [2022-07-22 12:10:17,515 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-07-22 12:10:17,533 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 172 transitions, 362 flow [2022-07-22 12:10:17,536 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 172 transitions, 362 flow [2022-07-22 12:10:17,537 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 164 places, 172 transitions, 362 flow [2022-07-22 12:10:17,580 INFO L129 PetriNetUnfolder]: 18/172 cut-off events. [2022-07-22 12:10:17,580 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 12:10:17,582 INFO L84 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 172 events. 18/172 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 317 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 126. Up to 4 conditions per place. [2022-07-22 12:10:17,591 INFO L116 LiptonReduction]: Number of co-enabled transitions 8646 [2022-07-22 12:10:24,582 INFO L131 LiptonReduction]: Checked pairs total: 18264 [2022-07-22 12:10:24,582 INFO L133 LiptonReduction]: Total number of compositions: 134 [2022-07-22 12:10:24,609 INFO L300 stractBuchiCegarLoop]: Interprodecural is true [2022-07-22 12:10:24,609 INFO L301 stractBuchiCegarLoop]: Hoare is false [2022-07-22 12:10:24,609 INFO L302 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-07-22 12:10:24,609 INFO L303 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-07-22 12:10:24,610 INFO L304 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-07-22 12:10:24,610 INFO L305 stractBuchiCegarLoop]: Difference is false [2022-07-22 12:10:24,610 INFO L306 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-07-22 12:10:24,610 INFO L310 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-07-22 12:10:24,613 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 0 states, but on-demand construction may add more states [2022-07-22 12:10:25,146 INFO L131 ngComponentsAnalysis]: Automaton has 886 accepting balls. 886 [2022-07-22 12:10:25,147 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 12:10:25,147 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 12:10:25,154 INFO L150 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-07-22 12:10:25,154 INFO L151 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2022-07-22 12:10:25,155 INFO L332 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-07-22 12:10:25,155 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand currently 2947 states, but on-demand construction may add more states [2022-07-22 12:10:25,240 INFO L131 ngComponentsAnalysis]: Automaton has 886 accepting balls. 886 [2022-07-22 12:10:25,241 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 12:10:25,241 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 12:10:25,241 INFO L150 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-07-22 12:10:25,242 INFO L151 hiAutomatonCegarLoop]: Counterexample loop histogram [1] [2022-07-22 12:10:25,248 INFO L748 eck$LassoCheckResult]: Stem: 170#[ULTIMATE.startENTRY]don't care [988] ULTIMATE.startENTRY-->L784-3: Formula: (let ((.cse2 (store |v_#valid_418| |v_ULTIMATE.start_main_~#t1~0#1.base_59| 1))) (let ((.cse0 (select |v_#memory_int_392| |v_~#mutex~0.base_122|)) (.cse3 (store .cse2 |v_ULTIMATE.start_main_~#t2~0#1.base_59| 1)) (.cse1 (select |v_#memory_int_392| 1))) (and (= (select |v_#valid_418| 1) 1) (= (select |v_#valid_418| 0) 0) (= |v_ULTIMATE.start_main_~#t1~0#1.offset_49| 0) (= |v_ULTIMATE.start_main_~#t3~0#1.offset_61| 0) (= (select .cse0 (+ 4 |v_~#mutex~0.offset_122|)) 0) (= (select .cse1 0) 48) (= |v_#pthreadsForks_54| (+ |v_#pthreadsForks_55| 1)) (= (store (store (store |v_#length_315| |v_ULTIMATE.start_main_~#t1~0#1.base_59| 4) |v_ULTIMATE.start_main_~#t2~0#1.base_59| 4) |v_ULTIMATE.start_main_~#t3~0#1.base_71| 4) |v_#length_314|) (= (select |v_#valid_418| |v_ULTIMATE.start_main_~#t1~0#1.base_59|) 0) (= (select |v_#valid_418| 3) 1) (< |v_#StackHeapBarrier_43| |v_ULTIMATE.start_main_~#t3~0#1.base_71|) (= (select .cse2 |v_ULTIMATE.start_main_~#t2~0#1.base_59|) 0) (= 9 (select |v_#length_315| 2)) (< 0 |v_#StackHeapBarrier_43|) (= (store |v_#memory_int_392| |v_ULTIMATE.start_main_~#t1~0#1.base_59| (store (select |v_#memory_int_392| |v_ULTIMATE.start_main_~#t1~0#1.base_59|) |v_ULTIMATE.start_main_~#t1~0#1.offset_49| |v_ULTIMATE.start_main_#t~pre22#1_25|)) |v_#memory_int_391|) (= 3 |v_~#mutex~0.base_122|) (= (select .cse0 (+ 16 |v_~#mutex~0.offset_122|)) 0) (= |v_#valid_417| (store .cse3 |v_ULTIMATE.start_main_~#t3~0#1.base_71| 1)) (= (select .cse0 |v_~#mutex~0.offset_122|) 0) (= |v_ULTIMATE.start_main_~#t2~0#1.offset_49| 0) (< |v_#StackHeapBarrier_43| |v_ULTIMATE.start_main_~#t2~0#1.base_59|) (= (select |v_#valid_418| 2) 1) (= (select .cse0 (+ 12 |v_~#mutex~0.offset_122|)) 0) (= v_~ctr1~0_475 1) (= |v_#pthreadsForks_55| |v_ULTIMATE.start_main_#t~pre22#1_25|) (= v_~readerprogress2~0_171 0) (= (store |v_#pthreadsMutex_188| |v_~#mutex~0.base_122| (store (select |v_#pthreadsMutex_188| |v_~#mutex~0.base_122|) |v_~#mutex~0.offset_122| 0)) |v_#pthreadsMutex_187|) (= v_~idx~0_80 0) (= (select .cse0 (+ 8 |v_~#mutex~0.offset_122|)) 0) (= |v_#NULL.offset_8| 0) (< |v_#StackHeapBarrier_43| |v_ULTIMATE.start_main_~#t1~0#1.base_59|) (= (select |v_#length_315| 1) 2) (= |v_#NULL.base_8| 0) (= (select |v_#length_315| 3) 24) (= (select .cse3 |v_ULTIMATE.start_main_~#t3~0#1.base_71|) 0) (= v_~readerprogress1~0_159 0) (= |v_~#mutex~0.offset_122| 0) (= v_~ctr2~0_470 0) (= (select .cse1 1) 0)))) InVars {#pthreadsMutex=|v_#pthreadsMutex_188|, #StackHeapBarrier=|v_#StackHeapBarrier_43|, #pthreadsForks=|v_#pthreadsForks_55|, #valid=|v_#valid_418|, #memory_int=|v_#memory_int_392|, #length=|v_#length_315|} OutVars{~#mutex~0.base=|v_~#mutex~0.base_122|, ULTIMATE.start_main_#t~pre26#1=|v_ULTIMATE.start_main_#t~pre26#1_29|, ULTIMATE.start_main_~#t2~0#1.offset=|v_ULTIMATE.start_main_~#t2~0#1.offset_49|, ULTIMATE.start_main_~#t3~0#1.offset=|v_ULTIMATE.start_main_~#t3~0#1.offset_61|, ULTIMATE.start_main_#t~mem30#1=|v_ULTIMATE.start_main_#t~mem30#1_46|, ~idx~0=v_~idx~0_80, ULTIMATE.start_main_#t~nondet25#1=|v_ULTIMATE.start_main_#t~nondet25#1_15|, ULTIMATE.start_main_~#t3~0#1.base=|v_ULTIMATE.start_main_~#t3~0#1.base_71|, #NULL.offset=|v_#NULL.offset_8|, ~ctr1~0=v_~ctr1~0_475, ULTIMATE.start_main_~#t1~0#1.offset=|v_ULTIMATE.start_main_~#t1~0#1.offset_49|, ~readerprogress1~0=v_~readerprogress1~0_159, #pthreadsForks=|v_#pthreadsForks_54|, #length=|v_#length_314|, #pthreadsMutex=|v_#pthreadsMutex_187|, ULTIMATE.start_main_#t~nondet23#1=|v_ULTIMATE.start_main_#t~nondet23#1_17|, ULTIMATE.start_main_#res#1=|v_ULTIMATE.start_main_#res#1_24|, ULTIMATE.start_main_#t~pre24#1=|v_ULTIMATE.start_main_#t~pre24#1_27|, ~#mutex~0.offset=|v_~#mutex~0.offset_122|, ULTIMATE.start_main_#t~mem29#1=|v_ULTIMATE.start_main_#t~mem29#1_50|, ~readerprogress2~0=v_~readerprogress2~0_171, ULTIMATE.start_main_~#t1~0#1.base=|v_ULTIMATE.start_main_~#t1~0#1.base_59|, ULTIMATE.start_main_#t~nondet27#1=|v_ULTIMATE.start_main_#t~nondet27#1_19|, ~ctr2~0=v_~ctr2~0_470, #NULL.base=|v_#NULL.base_8|, #StackHeapBarrier=|v_#StackHeapBarrier_43|, #valid=|v_#valid_417|, #memory_int=|v_#memory_int_391|, ULTIMATE.start_main_#t~pre22#1=|v_ULTIMATE.start_main_#t~pre22#1_25|, ULTIMATE.start_main_#t~mem28#1=|v_ULTIMATE.start_main_#t~mem28#1_42|, ULTIMATE.start_main_~#t2~0#1.base=|v_ULTIMATE.start_main_~#t2~0#1.base_59|} 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] 173#[L784-3]don't care [851] L784-3-->qrcu_reader1ENTRY: Formula: (and (= v_qrcu_reader1Thread1of1ForFork2_thidvar1_2 0) (= 0 |v_qrcu_reader1Thread1of1ForFork2_#in~arg#1.offset_4|) (= |v_qrcu_reader1Thread1of1ForFork2_#in~arg#1.base_4| 0) (= v_qrcu_reader1Thread1of1ForFork2_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_reader1Thread1of1ForFork2_#t~nondet9#1=|v_qrcu_reader1Thread1of1ForFork2_#t~nondet9#1_10|, qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use_done_#t~post6#1=|v_qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use_done_#t~post6#1_4|, qrcu_reader1Thread1of1ForFork2_#t~nondet10#1=|v_qrcu_reader1Thread1of1ForFork2_#t~nondet10#1_10|, qrcu_reader1Thread1of1ForFork2_#in~arg#1.offset=|v_qrcu_reader1Thread1of1ForFork2_#in~arg#1.offset_4|, qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use2_~myidx#1=|v_qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use2_~myidx#1_4|, qrcu_reader1Thread1of1ForFork2_assume_abort_if_not_~cond#1=|v_qrcu_reader1Thread1of1ForFork2_assume_abort_if_not_~cond#1_6|, qrcu_reader1Thread1of1ForFork2_#res#1.base=|v_qrcu_reader1Thread1of1ForFork2_#res#1.base_4|, qrcu_reader1Thread1of1ForFork2_#res#1.offset=|v_qrcu_reader1Thread1of1ForFork2_#res#1.offset_4|, qrcu_reader1Thread1of1ForFork2_~myidx~0#1=|v_qrcu_reader1Thread1of1ForFork2_~myidx~0#1_12|, qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use_done_#in~myidx#1=|v_qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use_done_#in~myidx#1_4|, qrcu_reader1Thread1of1ForFork2_thidvar0=v_qrcu_reader1Thread1of1ForFork2_thidvar0_2, qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use2_#t~post4#1=|v_qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use2_#t~post4#1_4|, qrcu_reader1Thread1of1ForFork2_~arg#1.base=|v_qrcu_reader1Thread1of1ForFork2_~arg#1.base_4|, qrcu_reader1Thread1of1ForFork2_thidvar1=v_qrcu_reader1Thread1of1ForFork2_thidvar1_2, qrcu_reader1Thread1of1ForFork2_~arg#1.offset=|v_qrcu_reader1Thread1of1ForFork2_~arg#1.offset_4|, qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use_done_~myidx#1=|v_qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use_done_~myidx#1_4|, qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use_done_#t~post5#1=|v_qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use_done_#t~post5#1_4|, qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use2_#in~myidx#1=|v_qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use2_#in~myidx#1_4|, qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use1_~myidx#1=|v_qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use1_~myidx#1_4|, ULTIMATE.start_main_#t~pre22#1=|v_ULTIMATE.start_main_#t~pre22#1_6|, qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use1_#t~post3#1=|v_qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use1_#t~post3#1_4|, qrcu_reader1Thread1of1ForFork2_#in~arg#1.base=|v_qrcu_reader1Thread1of1ForFork2_#in~arg#1.base_4|, qrcu_reader1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1=|v_qrcu_reader1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1_6|, qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use1_#in~myidx#1=|v_qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use1_#in~myidx#1_4|} AuxVars[] AssignedVars[qrcu_reader1Thread1of1ForFork2_#t~nondet9#1, qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use_done_#t~post6#1, qrcu_reader1Thread1of1ForFork2_#t~nondet10#1, qrcu_reader1Thread1of1ForFork2_#in~arg#1.offset, qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use2_~myidx#1, qrcu_reader1Thread1of1ForFork2_assume_abort_if_not_~cond#1, qrcu_reader1Thread1of1ForFork2_#res#1.base, qrcu_reader1Thread1of1ForFork2_#res#1.offset, qrcu_reader1Thread1of1ForFork2_~myidx~0#1, qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use_done_#in~myidx#1, qrcu_reader1Thread1of1ForFork2_thidvar0, qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use2_#t~post4#1, qrcu_reader1Thread1of1ForFork2_~arg#1.base, qrcu_reader1Thread1of1ForFork2_thidvar1, qrcu_reader1Thread1of1ForFork2_~arg#1.offset, qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use_done_~myidx#1, qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use_done_#t~post5#1, qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use2_#in~myidx#1, qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use1_~myidx#1, qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use1_#t~post3#1, qrcu_reader1Thread1of1ForFork2_#in~arg#1.base, qrcu_reader1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1, qrcu_reader1Thread1of1ForFork2___VERIFIER_atomic_use1_#in~myidx#1] 175#[qrcu_reader1ENTRY, L784-4]don't care [878] qrcu_reader1ENTRY-->L725-2: Formula: (and (= |v_qrcu_reader1Thread1of1ForFork2_#in~arg#1.base_5| |v_qrcu_reader1Thread1of1ForFork2_~arg#1.base_5|) (= |v_qrcu_reader1Thread1of1ForFork2_~arg#1.offset_5| |v_qrcu_reader1Thread1of1ForFork2_#in~arg#1.offset_5|)) InVars {qrcu_reader1Thread1of1ForFork2_#in~arg#1.offset=|v_qrcu_reader1Thread1of1ForFork2_#in~arg#1.offset_5|, qrcu_reader1Thread1of1ForFork2_#in~arg#1.base=|v_qrcu_reader1Thread1of1ForFork2_#in~arg#1.base_5|} OutVars{qrcu_reader1Thread1of1ForFork2_#in~arg#1.offset=|v_qrcu_reader1Thread1of1ForFork2_#in~arg#1.offset_5|, qrcu_reader1Thread1of1ForFork2_#in~arg#1.base=|v_qrcu_reader1Thread1of1ForFork2_#in~arg#1.base_5|, qrcu_reader1Thread1of1ForFork2_~myidx~0#1=|v_qrcu_reader1Thread1of1ForFork2_~myidx~0#1_13|, qrcu_reader1Thread1of1ForFork2_~arg#1.base=|v_qrcu_reader1Thread1of1ForFork2_~arg#1.base_5|, qrcu_reader1Thread1of1ForFork2_~arg#1.offset=|v_qrcu_reader1Thread1of1ForFork2_~arg#1.offset_5|} AuxVars[] AssignedVars[qrcu_reader1Thread1of1ForFork2_~myidx~0#1, qrcu_reader1Thread1of1ForFork2_~arg#1.base, qrcu_reader1Thread1of1ForFork2_~arg#1.offset] 177#[L725-2, L784-4]don't care [2022-07-22 12:10:25,252 INFO L750 eck$LassoCheckResult]: Loop: 177#[L725-2, L784-4]don't care [961] L725-2-->L725-2: Formula: (and (= 0 |v_qrcu_reader1Thread1of1ForFork2_#t~nondet10#1_24|) (= |v_qrcu_reader1Thread1of1ForFork2_#t~nondet9#1_48| 0) (= v_~idx~0_53 |v_qrcu_reader1Thread1of1ForFork2_~myidx~0#1_75|)) InVars {qrcu_reader1Thread1of1ForFork2_#t~nondet9#1=|v_qrcu_reader1Thread1of1ForFork2_#t~nondet9#1_48|, qrcu_reader1Thread1of1ForFork2_#t~nondet10#1=|v_qrcu_reader1Thread1of1ForFork2_#t~nondet10#1_24|, ~idx~0=v_~idx~0_53} OutVars{~idx~0=v_~idx~0_53, qrcu_reader1Thread1of1ForFork2_~myidx~0#1=|v_qrcu_reader1Thread1of1ForFork2_~myidx~0#1_75|} AuxVars[] AssignedVars[qrcu_reader1Thread1of1ForFork2_#t~nondet9#1, qrcu_reader1Thread1of1ForFork2_#t~nondet10#1, qrcu_reader1Thread1of1ForFork2_~myidx~0#1] 177#[L725-2, L784-4]don't care [2022-07-22 12:10:25,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:10:25,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1006518, now seen corresponding path program 1 times [2022-07-22 12:10:25,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:10:25,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529781243] [2022-07-22 12:10:25,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:10:25,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:10:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 12:10:25,492 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 12:10:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 12:10:25,588 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 12:10:25,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:10:25,592 INFO L85 PathProgramCache]: Analyzing trace with hash 992, now seen corresponding path program 1 times [2022-07-22 12:10:25,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:10:25,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502812477] [2022-07-22 12:10:25,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:10:25,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:10:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 12:10:25,624 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 12:10:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 12:10:25,641 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 12:10:25,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:10:25,643 INFO L85 PathProgramCache]: Analyzing trace with hash 31203019, now seen corresponding path program 1 times [2022-07-22 12:10:25,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:10:25,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927601964] [2022-07-22 12:10:25,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:10:25,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:10:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 12:10:25,681 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 12:10:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 12:10:25,712 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 12:10:26,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.07 12:10:26 BoogieIcfgContainer [2022-07-22 12:10:26,975 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-07-22 12:10:26,979 INFO L158 Benchmark]: Toolchain (without parser) took 11923.74ms. Allocated memory was 156.2MB in the beginning and 225.4MB in the end (delta: 69.2MB). Free memory was 130.3MB in the beginning and 184.0MB in the end (delta: -53.7MB). Peak memory consumption was 131.2MB. Max. memory is 8.0GB. [2022-07-22 12:10:26,980 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 156.2MB. Free memory is still 130.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-07-22 12:10:26,981 INFO L158 Benchmark]: CACSL2BoogieTranslator took 823.19ms. Allocated memory is still 156.2MB. Free memory was 130.1MB in the beginning and 109.4MB in the end (delta: 20.7MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. [2022-07-22 12:10:26,982 INFO L158 Benchmark]: Boogie Procedure Inliner took 68.70ms. Allocated memory is still 156.2MB. Free memory was 109.4MB in the beginning and 106.5MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-07-22 12:10:26,984 INFO L158 Benchmark]: Boogie Preprocessor took 40.50ms. Allocated memory is still 156.2MB. Free memory was 106.5MB in the beginning and 104.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-07-22 12:10:26,985 INFO L158 Benchmark]: RCFGBuilder took 1073.57ms. Allocated memory is still 156.2MB. Free memory was 104.6MB in the beginning and 108.0MB in the end (delta: -3.4MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. [2022-07-22 12:10:26,992 INFO L158 Benchmark]: BuchiAutomizer took 9905.02ms. Allocated memory was 156.2MB in the beginning and 225.4MB in the end (delta: 69.2MB). Free memory was 108.0MB in the beginning and 184.0MB in the end (delta: -75.9MB). Peak memory consumption was 109.2MB. Max. memory is 8.0GB. [2022-07-22 12:10:27,004 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 156.2MB. Free memory is still 130.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 823.19ms. Allocated memory is still 156.2MB. Free memory was 130.1MB in the beginning and 109.4MB in the end (delta: 20.7MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 68.70ms. Allocated memory is still 156.2MB. Free memory was 109.4MB in the beginning and 106.5MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.50ms. Allocated memory is still 156.2MB. Free memory was 106.5MB in the beginning and 104.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 1073.57ms. Allocated memory is still 156.2MB. Free memory was 104.6MB in the beginning and 108.0MB in the end (delta: -3.4MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. * BuchiAutomizer took 9905.02ms. Allocated memory was 156.2MB in the beginning and 225.4MB in the end (delta: 69.2MB). Free memory was 108.0MB in the beginning and 184.0MB in the end (delta: -75.9MB). Peak memory consumption was 109.2MB. 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 9.6s and 1 iterations. TraceHistogramMax:1. Analysis of lassos took 1.6s. 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: 7.3s - 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@3dc65c55=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@442e2ee3 in0,0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5e2cf445 in3014,0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@739074bf in0,0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@7ce8b80d=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTIdExpression@37050c4a=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTIdExpression@4da18861=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTIdExpression@6079cfc4=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTUnaryExpression@1c061d55=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTUnaryExpression@53f0621=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTUnaryExpression@6cd46a89=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTUnaryExpression@7b98cac4=0, readerprogress1=0, readerprogress2=0, t1={22514:0}, t2={22515:0}, t3={22513:0}} - 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: 7.0s, 164 PlacesBefore, 57 PlacesAfterwards, 172 TransitionsBefore, 60 TransitionsAfterwards, 8646 CoEnabledTransitionPairs, 6 FixpointIterations, 40 TrivialSequentialCompositions, 69 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 20 ConcurrentYvCompositions, 5 ChoiceCompositions, 134 TotalNumberOfCompositions, 18264 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8559, positive: 8222, positive conditional: 0, positive unconditional: 8222, negative: 337, negative conditional: 0, negative unconditional: 337, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 5621, positive: 5526, positive conditional: 0, positive unconditional: 5526, negative: 95, negative conditional: 0, negative unconditional: 95, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 5621, positive: 5452, positive conditional: 0, positive unconditional: 5452, negative: 169, negative conditional: 0, negative unconditional: 169, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 169, positive: 74, positive conditional: 0, positive unconditional: 74, negative: 95, negative conditional: 0, negative unconditional: 95, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 521, positive: 229, positive conditional: 0, positive unconditional: 229, negative: 292, negative conditional: 0, negative unconditional: 292, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 8559, positive: 2696, positive conditional: 0, positive unconditional: 2696, negative: 242, negative conditional: 0, negative unconditional: 242, unknown: 5621, unknown conditional: 0, unknown unconditional: 5621] , Statistics on independence cache: Total cache size (in pairs): 587, Positive cache size: 541, Positive conditional cache size: 0, Positive unconditional cache size: 541, Negative cache size: 46, Negative conditional cache size: 0, Negative unconditional cache size: 46 RESULT: Ultimate proved your program to be incorrect! [2022-07-22 12:10:27,106 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...