./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-atomic/qrcu-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-atomic/qrcu-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d1980d3c26a5811df2d100379a9d31e1e9ec963bc59bfe660be33ada51bfb014 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:34:46,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:34:46,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:34:46,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:34:46,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:34:46,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:34:46,759 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:34:46,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:34:46,763 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:34:46,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:34:46,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:34:46,772 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:34:46,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:34:46,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:34:46,775 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:34:46,778 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:34:46,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:34:46,780 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:34:46,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:34:46,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:34:46,788 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:34:46,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:34:46,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:34:46,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:34:46,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:34:46,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:34:46,799 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:34:46,799 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:34:46,800 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:34:46,800 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:34:46,801 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:34:46,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:34:46,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:34:46,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:34:46,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:34:46,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:34:46,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:34:46,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:34:46,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:34:46,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:34:46,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:34:46,809 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:34:46,814 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:34:46,846 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:34:46,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:34:46,847 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:34:46,847 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:34:46,848 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:34:46,848 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:34:46,849 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:34:46,849 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:34:46,849 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:34:46,850 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:34:46,850 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:34:46,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:34:46,851 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:34:46,851 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:34:46,851 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:34:46,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:34:46,852 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:34:46,852 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:34:46,852 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:34:46,852 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:34:46,852 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:34:46,853 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:34:46,853 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:34:46,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:34:46,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:34:46,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:34:46,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:34:46,854 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:34:46,854 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:34:46,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:34:46,854 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:34:46,855 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:34:46,855 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:34:46,855 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1980d3c26a5811df2d100379a9d31e1e9ec963bc59bfe660be33ada51bfb014 [2022-07-21 08:34:47,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:34:47,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:34:47,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:34:47,162 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:34:47,163 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:34:47,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-atomic/qrcu-2.i [2022-07-21 08:34:47,216 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d22a8fe0/73296de8de6f49d7a171f3c4b0775e2c/FLAG549ff4edb [2022-07-21 08:34:47,699 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:34:47,699 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/qrcu-2.i [2022-07-21 08:34:47,713 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d22a8fe0/73296de8de6f49d7a171f3c4b0775e2c/FLAG549ff4edb [2022-07-21 08:34:48,197 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d22a8fe0/73296de8de6f49d7a171f3c4b0775e2c [2022-07-21 08:34:48,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:34:48,201 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:34:48,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:34:48,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:34:48,206 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:34:48,207 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:34:48" (1/1) ... [2022-07-21 08:34:48,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43711fa3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:48, skipping insertion in model container [2022-07-21 08:34:48,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:34:48" (1/1) ... [2022-07-21 08:34:48,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:34:48,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:34:48,554 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/qrcu-2.i[30690,30703] [2022-07-21 08:34:48,559 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/qrcu-2.i[30912,30925] [2022-07-21 08:34:48,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:34:48,605 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:34:48,659 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/qrcu-2.i[30690,30703] [2022-07-21 08:34:48,663 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/qrcu-2.i[30912,30925] [2022-07-21 08:34:48,672 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:34:48,713 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:34:48,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:48 WrapperNode [2022-07-21 08:34:48,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:34:48,715 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:34:48,715 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:34:48,715 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:34:48,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:48" (1/1) ... [2022-07-21 08:34:48,742 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:48" (1/1) ... [2022-07-21 08:34:48,772 INFO L137 Inliner]: procedures = 177, calls = 44, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 262 [2022-07-21 08:34:48,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:34:48,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:34:48,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:34:48,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:34:48,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:48" (1/1) ... [2022-07-21 08:34:48,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:48" (1/1) ... [2022-07-21 08:34:48,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:48" (1/1) ... [2022-07-21 08:34:48,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:48" (1/1) ... [2022-07-21 08:34:48,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:48" (1/1) ... [2022-07-21 08:34:48,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:48" (1/1) ... [2022-07-21 08:34:48,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:48" (1/1) ... [2022-07-21 08:34:48,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:34:48,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:34:48,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:34:48,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:34:48,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:48" (1/1) ... [2022-07-21 08:34:48,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:34:48,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:34:48,856 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 08:34:48,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 08:34:48,895 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader1 [2022-07-21 08:34:48,896 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader1 [2022-07-21 08:34:48,896 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader2 [2022-07-21 08:34:48,896 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader2 [2022-07-21 08:34:48,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:34:48,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:34:48,896 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_updater [2022-07-21 08:34:48,896 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_updater [2022-07-21 08:34:48,896 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-21 08:34:48,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:34:48,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:34:48,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:34:48,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:34:48,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:34:48,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:34:48,898 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:34:49,005 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:34:49,016 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:34:49,424 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:34:49,601 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:34:49,602 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 08:34:49,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:34:49 BoogieIcfgContainer [2022-07-21 08:34:49,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:34:49,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:34:49,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:34:49,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:34:49,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:34:48" (1/3) ... [2022-07-21 08:34:49,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f317d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:34:49, skipping insertion in model container [2022-07-21 08:34:49,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:48" (2/3) ... [2022-07-21 08:34:49,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f317d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:34:49, skipping insertion in model container [2022-07-21 08:34:49,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:34:49" (3/3) ... [2022-07-21 08:34:49,612 INFO L111 eAbstractionObserver]: Analyzing ICFG qrcu-2.i [2022-07-21 08:34:49,617 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:34:49,624 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:34:49,625 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 08:34:49,625 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:34:49,715 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-21 08:34:49,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 171 places, 179 transitions, 382 flow [2022-07-21 08:34:49,837 INFO L129 PetriNetUnfolder]: 18/176 cut-off events. [2022-07-21 08:34:49,837 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-21 08:34:49,845 INFO L84 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 176 events. 18/176 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 320 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 130. Up to 4 conditions per place. [2022-07-21 08:34:49,846 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 179 transitions, 382 flow [2022-07-21 08:34:49,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 164 transitions, 343 flow [2022-07-21 08:34:49,859 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:34:49,864 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5e11e1ed, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@237eaa90 [2022-07-21 08:34:49,865 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-21 08:34:49,896 INFO L129 PetriNetUnfolder]: 9/121 cut-off events. [2022-07-21 08:34:49,896 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 08:34:49,896 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:49,897 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:34:49,897 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting qrcu_updaterErr0ASSERT_VIOLATIONERROR_FUNCTION === [qrcu_updaterErr0ASSERT_VIOLATIONERROR_FUNCTION, qrcu_updaterErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:34:49,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:49,901 INFO L85 PathProgramCache]: Analyzing trace with hash 8178963, now seen corresponding path program 1 times [2022-07-21 08:34:49,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:49,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824074497] [2022-07-21 08:34:49,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:49,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:50,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:50,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824074497] [2022-07-21 08:34:50,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824074497] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:34:50,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:34:50,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:34:50,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173805081] [2022-07-21 08:34:50,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:34:50,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:34:50,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:50,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:34:50,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:34:50,205 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2022-07-21 08:34:50,211 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 164 transitions, 343 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:50,212 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:50,212 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2022-07-21 08:34:50,213 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:50,588 INFO L129 PetriNetUnfolder]: 629/1607 cut-off events. [2022-07-21 08:34:50,589 INFO L130 PetriNetUnfolder]: For 265/265 co-relation queries the response was YES. [2022-07-21 08:34:50,598 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2580 conditions, 1607 events. 629/1607 cut-off events. For 265/265 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 10485 event pairs, 272 based on Foata normal form. 180/1614 useless extension candidates. Maximal degree in co-relation 1802. Up to 618 conditions per place. [2022-07-21 08:34:50,609 INFO L132 encePairwiseOnDemand]: 170/179 looper letters, 40 selfloop transitions, 2 changer transitions 0/171 dead transitions. [2022-07-21 08:34:50,609 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 171 transitions, 447 flow [2022-07-21 08:34:50,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:34:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:34:50,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2022-07-21 08:34:50,625 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8975791433891993 [2022-07-21 08:34:50,626 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2022-07-21 08:34:50,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2022-07-21 08:34:50,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:50,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2022-07-21 08:34:50,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:50,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:50,641 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:50,643 INFO L186 Difference]: Start difference. First operand has 156 places, 164 transitions, 343 flow. Second operand 3 states and 482 transitions. [2022-07-21 08:34:50,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 171 transitions, 447 flow [2022-07-21 08:34:50,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 171 transitions, 434 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-21 08:34:50,652 INFO L242 Difference]: Finished difference. Result has 155 places, 159 transitions, 336 flow [2022-07-21 08:34:50,654 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=336, PETRI_PLACES=155, PETRI_TRANSITIONS=159} [2022-07-21 08:34:50,659 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, -1 predicate places. [2022-07-21 08:34:50,659 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 159 transitions, 336 flow [2022-07-21 08:34:50,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:50,660 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:50,660 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:34:50,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:34:50,661 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting qrcu_updaterErr0ASSERT_VIOLATIONERROR_FUNCTION === [qrcu_updaterErr0ASSERT_VIOLATIONERROR_FUNCTION, qrcu_updaterErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:34:50,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:50,663 INFO L85 PathProgramCache]: Analyzing trace with hash 959725496, now seen corresponding path program 1 times [2022-07-21 08:34:50,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:50,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401485014] [2022-07-21 08:34:50,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:50,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:50,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:50,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401485014] [2022-07-21 08:34:50,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401485014] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:34:50,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:34:50,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:34:50,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885431277] [2022-07-21 08:34:50,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:34:50,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:34:50,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:50,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:34:50,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:34:50,805 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 179 [2022-07-21 08:34:50,806 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 159 transitions, 336 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:50,806 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:50,806 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 179 [2022-07-21 08:34:50,806 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:50,990 INFO L129 PetriNetUnfolder]: 402/1183 cut-off events. [2022-07-21 08:34:50,991 INFO L130 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-07-21 08:34:50,996 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1815 conditions, 1183 events. 402/1183 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 7339 event pairs, 79 based on Foata normal form. 0/1032 useless extension candidates. Maximal degree in co-relation 1139. Up to 395 conditions per place. [2022-07-21 08:34:51,002 INFO L132 encePairwiseOnDemand]: 176/179 looper letters, 26 selfloop transitions, 2 changer transitions 0/168 dead transitions. [2022-07-21 08:34:51,002 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 168 transitions, 413 flow [2022-07-21 08:34:51,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:34:51,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:34:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2022-07-21 08:34:51,004 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9087523277467412 [2022-07-21 08:34:51,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2022-07-21 08:34:51,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2022-07-21 08:34:51,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:51,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2022-07-21 08:34:51,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:51,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:51,009 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:51,009 INFO L186 Difference]: Start difference. First operand has 155 places, 159 transitions, 336 flow. Second operand 3 states and 488 transitions. [2022-07-21 08:34:51,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 168 transitions, 413 flow [2022-07-21 08:34:51,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 168 transitions, 411 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 08:34:51,018 INFO L242 Difference]: Finished difference. Result has 157 places, 159 transitions, 342 flow [2022-07-21 08:34:51,018 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=342, PETRI_PLACES=157, PETRI_TRANSITIONS=159} [2022-07-21 08:34:51,019 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, 1 predicate places. [2022-07-21 08:34:51,020 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 159 transitions, 342 flow [2022-07-21 08:34:51,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:51,021 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:51,021 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:34:51,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:34:51,022 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting qrcu_updaterErr1ASSERT_VIOLATIONERROR_FUNCTION === [qrcu_updaterErr0ASSERT_VIOLATIONERROR_FUNCTION, qrcu_updaterErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:34:51,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:51,024 INFO L85 PathProgramCache]: Analyzing trace with hash -313279830, now seen corresponding path program 1 times [2022-07-21 08:34:51,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:51,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875771120] [2022-07-21 08:34:51,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:51,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:51,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:51,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:51,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875771120] [2022-07-21 08:34:51,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875771120] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:34:51,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:34:51,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 08:34:51,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716016102] [2022-07-21 08:34:51,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:34:51,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:34:51,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:51,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:34:51,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:34:51,128 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 179 [2022-07-21 08:34:51,129 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 159 transitions, 342 flow. Second operand has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:51,129 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:51,129 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 179 [2022-07-21 08:34:51,129 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:51,311 INFO L129 PetriNetUnfolder]: 399/1164 cut-off events. [2022-07-21 08:34:51,312 INFO L130 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2022-07-21 08:34:51,316 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1830 conditions, 1164 events. 399/1164 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 7210 event pairs, 94 based on Foata normal form. 0/1024 useless extension candidates. Maximal degree in co-relation 1268. Up to 363 conditions per place. [2022-07-21 08:34:51,323 INFO L132 encePairwiseOnDemand]: 176/179 looper letters, 26 selfloop transitions, 2 changer transitions 0/168 dead transitions. [2022-07-21 08:34:51,323 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 168 transitions, 421 flow [2022-07-21 08:34:51,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:34:51,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:34:51,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2022-07-21 08:34:51,327 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9087523277467412 [2022-07-21 08:34:51,327 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2022-07-21 08:34:51,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2022-07-21 08:34:51,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:51,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2022-07-21 08:34:51,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:51,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:51,331 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:51,331 INFO L186 Difference]: Start difference. First operand has 157 places, 159 transitions, 342 flow. Second operand 3 states and 488 transitions. [2022-07-21 08:34:51,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 168 transitions, 421 flow [2022-07-21 08:34:51,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 168 transitions, 417 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 08:34:51,337 INFO L242 Difference]: Finished difference. Result has 158 places, 159 transitions, 346 flow [2022-07-21 08:34:51,338 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=346, PETRI_PLACES=158, PETRI_TRANSITIONS=159} [2022-07-21 08:34:51,339 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, 2 predicate places. [2022-07-21 08:34:51,339 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 159 transitions, 346 flow [2022-07-21 08:34:51,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:51,339 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:51,340 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:34:51,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:34:51,340 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting qrcu_updaterErr0ASSERT_VIOLATIONERROR_FUNCTION === [qrcu_updaterErr0ASSERT_VIOLATIONERROR_FUNCTION, qrcu_updaterErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:34:51,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:51,341 INFO L85 PathProgramCache]: Analyzing trace with hash 492044002, now seen corresponding path program 1 times [2022-07-21 08:34:51,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:51,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420111764] [2022-07-21 08:34:51,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:51,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:51,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:51,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:51,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420111764] [2022-07-21 08:34:51,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420111764] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:34:51,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:34:51,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:34:51,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427758278] [2022-07-21 08:34:51,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:34:51,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:34:51,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:51,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:34:51,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:34:51,454 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 179 [2022-07-21 08:34:51,455 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 159 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 131.5) internal successors, (789), 6 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:51,456 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:51,456 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 179 [2022-07-21 08:34:51,456 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:51,865 INFO L129 PetriNetUnfolder]: 779/1700 cut-off events. [2022-07-21 08:34:51,866 INFO L130 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2022-07-21 08:34:51,872 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3076 conditions, 1700 events. 779/1700 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 11370 event pairs, 174 based on Foata normal form. 96/1704 useless extension candidates. Maximal degree in co-relation 2920. Up to 959 conditions per place. [2022-07-21 08:34:51,881 INFO L132 encePairwiseOnDemand]: 161/179 looper letters, 93 selfloop transitions, 31 changer transitions 0/239 dead transitions. [2022-07-21 08:34:51,882 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 239 transitions, 790 flow [2022-07-21 08:34:51,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 08:34:51,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 08:34:51,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1166 transitions. [2022-07-21 08:34:51,885 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8142458100558659 [2022-07-21 08:34:51,886 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1166 transitions. [2022-07-21 08:34:51,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1166 transitions. [2022-07-21 08:34:51,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:51,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1166 transitions. [2022-07-21 08:34:51,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 145.75) internal successors, (1166), 8 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:51,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:51,893 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:51,893 INFO L186 Difference]: Start difference. First operand has 158 places, 159 transitions, 346 flow. Second operand 8 states and 1166 transitions. [2022-07-21 08:34:51,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 239 transitions, 790 flow [2022-07-21 08:34:51,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 239 transitions, 786 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 08:34:51,898 INFO L242 Difference]: Finished difference. Result has 169 places, 192 transitions, 589 flow [2022-07-21 08:34:51,899 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=589, PETRI_PLACES=169, PETRI_TRANSITIONS=192} [2022-07-21 08:34:51,900 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, 13 predicate places. [2022-07-21 08:34:51,900 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 192 transitions, 589 flow [2022-07-21 08:34:51,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 131.5) internal successors, (789), 6 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:51,901 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:51,901 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:34:51,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:34:51,901 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting qrcu_updaterErr0ASSERT_VIOLATIONERROR_FUNCTION === [qrcu_updaterErr0ASSERT_VIOLATIONERROR_FUNCTION, qrcu_updaterErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:34:51,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:51,902 INFO L85 PathProgramCache]: Analyzing trace with hash 781087292, now seen corresponding path program 1 times [2022-07-21 08:34:51,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:51,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688973612] [2022-07-21 08:34:51,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:51,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:52,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:52,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688973612] [2022-07-21 08:34:52,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688973612] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:34:52,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:34:52,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 08:34:52,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879320804] [2022-07-21 08:34:52,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:34:52,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 08:34:52,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:52,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 08:34:52,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 08:34:52,011 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 179 [2022-07-21 08:34:52,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 192 transitions, 589 flow. Second operand has 7 states, 7 states have (on average 131.14285714285714) internal successors, (918), 7 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:52,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:52,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 179 [2022-07-21 08:34:52,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:52,487 INFO L129 PetriNetUnfolder]: 855/1909 cut-off events. [2022-07-21 08:34:52,487 INFO L130 PetriNetUnfolder]: For 2645/2658 co-relation queries the response was YES. [2022-07-21 08:34:52,497 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5078 conditions, 1909 events. 855/1909 cut-off events. For 2645/2658 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12907 event pairs, 89 based on Foata normal form. 32/1865 useless extension candidates. Maximal degree in co-relation 4884. Up to 655 conditions per place. [2022-07-21 08:34:52,509 INFO L132 encePairwiseOnDemand]: 158/179 looper letters, 117 selfloop transitions, 37 changer transitions 0/269 dead transitions. [2022-07-21 08:34:52,509 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 269 transitions, 1207 flow [2022-07-21 08:34:52,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 08:34:52,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 08:34:52,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1430 transitions. [2022-07-21 08:34:52,513 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7988826815642458 [2022-07-21 08:34:52,513 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1430 transitions. [2022-07-21 08:34:52,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1430 transitions. [2022-07-21 08:34:52,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:52,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1430 transitions. [2022-07-21 08:34:52,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 143.0) internal successors, (1430), 10 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:52,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 179.0) internal successors, (1969), 11 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:52,561 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 179.0) internal successors, (1969), 11 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:52,561 INFO L186 Difference]: Start difference. First operand has 169 places, 192 transitions, 589 flow. Second operand 10 states and 1430 transitions. [2022-07-21 08:34:52,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 269 transitions, 1207 flow [2022-07-21 08:34:52,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 269 transitions, 1207 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:34:52,577 INFO L242 Difference]: Finished difference. Result has 183 places, 208 transitions, 828 flow [2022-07-21 08:34:52,577 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=828, PETRI_PLACES=183, PETRI_TRANSITIONS=208} [2022-07-21 08:34:52,578 INFO L279 CegarLoopForPetriNet]: 156 programPoint places, 27 predicate places. [2022-07-21 08:34:52,578 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 208 transitions, 828 flow [2022-07-21 08:34:52,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 131.14285714285714) internal successors, (918), 7 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 08:34:52,579 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:52,579 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:34:52,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:34:52,580 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting qrcu_updaterErr0ASSERT_VIOLATIONERROR_FUNCTION === [qrcu_updaterErr0ASSERT_VIOLATIONERROR_FUNCTION, qrcu_updaterErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 08:34:52,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:52,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1640377934, now seen corresponding path program 2 times [2022-07-21 08:34:52,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:52,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976910240] [2022-07-21 08:34:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:52,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:34:52,601 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:34:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:34:52,642 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:34:52,643 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:34:52,643 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location qrcu_updaterErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2022-07-21 08:34:52,645 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location qrcu_updaterErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-21 08:34:52,645 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location qrcu_updaterErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-07-21 08:34:52,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2022-07-21 08:34:52,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2022-07-21 08:34:52,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2022-07-21 08:34:52,646 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location qrcu_updaterErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-21 08:34:52,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 08:34:52,647 INFO L356 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2022-07-21 08:34:52,651 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-21 08:34:52,651 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 08:34:52,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:34:52 BasicIcfg [2022-07-21 08:34:52,730 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 08:34:52,731 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 08:34:52,731 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 08:34:52,731 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 08:34:52,731 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:34:49" (3/4) ... [2022-07-21 08:34:52,733 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-21 08:34:52,796 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-21 08:34:52,796 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 08:34:52,797 INFO L158 Benchmark]: Toolchain (without parser) took 4596.30ms. Allocated memory was 69.2MB in the beginning and 199.2MB in the end (delta: 130.0MB). Free memory was 53.5MB in the beginning and 86.5MB in the end (delta: -33.0MB). Peak memory consumption was 95.4MB. Max. memory is 16.1GB. [2022-07-21 08:34:52,797 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 50.3MB. Free memory was 32.0MB in the beginning and 32.0MB in the end (delta: 30.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 08:34:52,798 INFO L158 Benchmark]: CACSL2BoogieTranslator took 510.91ms. Allocated memory is still 69.2MB. Free memory was 53.4MB in the beginning and 41.2MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-21 08:34:52,798 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.97ms. Allocated memory is still 69.2MB. Free memory was 41.0MB in the beginning and 38.2MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-21 08:34:52,799 INFO L158 Benchmark]: Boogie Preprocessor took 46.99ms. Allocated memory is still 69.2MB. Free memory was 38.2MB in the beginning and 51.8MB in the end (delta: -13.5MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. [2022-07-21 08:34:52,799 INFO L158 Benchmark]: RCFGBuilder took 784.03ms. Allocated memory is still 69.2MB. Free memory was 51.5MB in the beginning and 38.0MB in the end (delta: 13.5MB). Peak memory consumption was 23.2MB. Max. memory is 16.1GB. [2022-07-21 08:34:52,799 INFO L158 Benchmark]: TraceAbstraction took 3124.00ms. Allocated memory was 69.2MB in the beginning and 199.2MB in the end (delta: 130.0MB). Free memory was 37.3MB in the beginning and 106.4MB in the end (delta: -69.1MB). Peak memory consumption was 61.9MB. Max. memory is 16.1GB. [2022-07-21 08:34:52,800 INFO L158 Benchmark]: Witness Printer took 65.80ms. Allocated memory is still 199.2MB. Free memory was 106.4MB in the beginning and 86.5MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-07-21 08:34:52,802 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 50.3MB. Free memory was 32.0MB in the beginning and 32.0MB in the end (delta: 30.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 510.91ms. Allocated memory is still 69.2MB. Free memory was 53.4MB in the beginning and 41.2MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.97ms. Allocated memory is still 69.2MB. Free memory was 41.0MB in the beginning and 38.2MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.99ms. Allocated memory is still 69.2MB. Free memory was 38.2MB in the beginning and 51.8MB in the end (delta: -13.5MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. * RCFGBuilder took 784.03ms. Allocated memory is still 69.2MB. Free memory was 51.5MB in the beginning and 38.0MB in the end (delta: 13.5MB). Peak memory consumption was 23.2MB. Max. memory is 16.1GB. * TraceAbstraction took 3124.00ms. Allocated memory was 69.2MB in the beginning and 199.2MB in the end (delta: 130.0MB). Free memory was 37.3MB in the beginning and 106.4MB in the end (delta: -69.1MB). Peak memory consumption was 61.9MB. Max. memory is 16.1GB. * Witness Printer took 65.80ms. Allocated memory is still 199.2MB. Free memory was 106.4MB in the beginning and 86.5MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 712]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L689] 0 int idx=0; VAL [idx=0] [L690] 0 int ctr1=1, ctr2=0; VAL [ctr1=1, ctr2=0, idx=0] [L691] 0 int readerprogress1=0, readerprogress2=0; VAL [ctr1=1, ctr2=0, idx=0, readerprogress1=0, readerprogress2=0] [L692] 0 pthread_mutex_t mutex; VAL [ctr1=1, ctr2=0, idx=0, mutex={3:0}, readerprogress1=0, readerprogress2=0] [L782] 0 pthread_t t1, t2, t3; VAL [ctr1=1, ctr2=0, idx=0, mutex={3:0}, readerprogress1=0, readerprogress2=0, t1={6:0}, t2={7:0}, t3={5:0}] [L784] FCALL, FORK 0 pthread_create(&t1, 0, qrcu_reader1, 0) VAL [ctr1=1, ctr2=0, idx=0, mutex={3:0}, pthread_create(&t1, 0, qrcu_reader1, 0)=13, readerprogress1=0, readerprogress2=0, t1={6:0}, t2={7:0}, t3={5:0}] [L785] FCALL, FORK 0 pthread_create(&t2, 0, qrcu_reader2, 0) VAL [ctr1=1, ctr2=0, idx=0, mutex={3:0}, pthread_create(&t2, 0, qrcu_reader2, 0)=14, readerprogress1=0, readerprogress2=0, t1={6:0}, t2={7:0}, t3={5:0}] [L786] FCALL, FORK 0 pthread_create(&t3, 0, qrcu_updater, 0) VAL [ctr1=1, ctr2=0, idx=0, mutex={3:0}, pthread_create(&t3, 0, qrcu_updater, 0)=15, readerprogress1=0, readerprogress2=0, t1={6:0}, t2={7:0}, t3={5:0}] [L762] 3 int i; VAL [arg={0:0}, arg={0:0}, ctr1=1, ctr2=0, idx=0, mutex={3:0}, readerprogress1=0, readerprogress2=0] [L763] 3 int readerstart1=__VERIFIER_nondet_int(), readerstart2=__VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=1, arg={0:0}, arg={0:0}, ctr1=1, ctr2=0, idx=0, mutex={3:0}, readerprogress1=0, readerprogress2=0, readerstart1=1] [L763] 3 int readerstart1=__VERIFIER_nondet_int(), readerstart2=__VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=0, arg={0:0}, arg={0:0}, ctr1=1, ctr2=0, idx=0, mutex={3:0}, readerprogress1=0, readerprogress2=0, readerstart1=1, readerstart2=0] [L764] 3 int sum; VAL [arg={0:0}, arg={0:0}, ctr1=1, ctr2=0, idx=0, mutex={3:0}, readerprogress1=0, readerprogress2=0, readerstart1=1, readerstart2=0] [L765] CALL 3 __VERIFIER_atomic_take_snapshot(readerstart1, readerstart2) [L706] 3 readerstart1 = readerprogress1 [L707] 3 readerstart2 = readerprogress2 [L765] RET 3 __VERIFIER_atomic_take_snapshot(readerstart1, readerstart2) [L766] COND TRUE 3 __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, arg={0:0}, arg={0:0}, ctr1=1, ctr2=0, idx=0, mutex={3:0}, readerprogress1=0, readerprogress2=0, readerstart1=1, readerstart2=0] [L766] 3 sum = ctr1 VAL [arg={0:0}, arg={0:0}, ctr1=1, ctr2=0, idx=0, mutex={3:0}, readerprogress1=0, readerprogress2=0, readerstart1=1, readerstart2=0, sum=1] [L766] 3 sum = sum + ctr2 VAL [arg={0:0}, arg={0:0}, ctr1=1, ctr2=0, idx=0, mutex={3:0}, readerprogress1=0, readerprogress2=0, readerstart1=1, readerstart2=0, sum=1] [L767] COND TRUE 3 sum <= 1 VAL [arg={0:0}, arg={0:0}, ctr1=1, ctr2=0, idx=0, mutex={3:0}, readerprogress1=0, readerprogress2=0, readerstart1=1, readerstart2=0, sum=1] [L767] COND FALSE 3 !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, arg={0:0}, arg={0:0}, ctr1=1, ctr2=0, idx=0, mutex={3:0}, readerprogress1=0, readerprogress2=0, readerstart1=1, readerstart2=0, sum=1] [L767] 3 sum = ctr2 VAL [arg={0:0}, arg={0:0}, ctr1=1, ctr2=0, idx=0, mutex={3:0}, readerprogress1=0, readerprogress2=0, readerstart1=1, readerstart2=0, sum=0] [L767] 3 sum = sum + ctr1 VAL [arg={0:0}, arg={0:0}, ctr1=1, ctr2=0, idx=0, mutex={3:0}, readerprogress1=0, readerprogress2=0, readerstart1=1, readerstart2=0, sum=1] [L769] COND FALSE 3 !(sum > 1) VAL [arg={0:0}, arg={0:0}, ctr1=1, ctr2=0, idx=0, mutex={3:0}, readerprogress1=0, readerprogress2=0, readerstart1=1, readerstart2=0, sum=1] [L724] 1 int myidx; VAL [arg={0:0}, arg={0:0}, ctr1=1, ctr2=0, idx=0, mutex={3:0}, readerprogress1=0, readerprogress2=0] [L725] COND TRUE 1 1 VAL [arg={0:0}, arg={0:0}, ctr1=1, ctr2=0, idx=0, mutex={3:0}, readerprogress1=0, readerprogress2=0] [L726] 1 myidx = idx VAL [arg={0:0}, arg={0:0}, ctr1=1, ctr2=0, idx=0, mutex={3:0}, myidx=0, readerprogress1=0, readerprogress2=0] [L727] COND TRUE 1 __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, arg={0:0}, arg={0:0}, ctr1=1, ctr2=0, idx=0, mutex={3:0}, myidx=0, readerprogress1=0, readerprogress2=0] [L728] CALL 1 __VERIFIER_atomic_use1(myidx) [L694] CALL 1 assume_abort_if_not(myidx <= 0 && ctr1>0) [L3] COND FALSE 1 !(!cond) [L694] RET 1 assume_abort_if_not(myidx <= 0 && ctr1>0) [L695] 1 ctr1++ [L728] RET 1 __VERIFIER_atomic_use1(myidx) [L737] 1 readerprogress1 = 1 VAL [arg={0:0}, arg={0:0}, ctr1=2, ctr2=0, idx=0, mutex={3:0}, myidx=0, readerprogress1=1, readerprogress2=0] [L777] CALL 3 __VERIFIER_atomic_check_progress1(readerstart1) [L710] COND TRUE 3 __VERIFIER_nondet_int() [L711] CALL 3 assume_abort_if_not(readerstart1 == 1 && readerprogress1 == 1) [L3] COND FALSE 3 !(!cond) [L711] RET 3 assume_abort_if_not(readerstart1 == 1 && readerprogress1 == 1) [L712] COND TRUE 3 !(0) [L712] 3 reach_error() VAL [\old(readerstart1)=1, ctr1=2, ctr2=0, idx=0, mutex={3:0}, readerprogress1=1, readerprogress2=0, readerstart1=1] - UnprovableResult [Line: 719]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 785]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 784]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 786]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 261 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.9s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 178 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 178 mSDsluCounter, 103 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 212 mSDsCounter, 52 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 765 IncrementalHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 52 mSolverCounterUnsat, 58 mSDtfsCounter, 765 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=828occurred in iteration=5, InterpolantAutomatonStates: 27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 425 NumberOfCodeBlocks, 425 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 344 ConstructedInterpolants, 0 QuantifiedInterpolants, 1411 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-21 08:34:52,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE