/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-atomic/qrcu-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-3902331-m [2022-09-20 22:20:26,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-20 22:20:26,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-20 22:20:26,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-20 22:20:26,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-20 22:20:26,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-20 22:20:26,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-20 22:20:26,805 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-20 22:20:26,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-20 22:20:26,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-20 22:20:26,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-20 22:20:26,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-20 22:20:26,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-20 22:20:26,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-20 22:20:26,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-20 22:20:26,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-20 22:20:26,813 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-20 22:20:26,814 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-20 22:20:26,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-20 22:20:26,817 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-20 22:20:26,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-20 22:20:26,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-20 22:20:26,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-20 22:20:26,820 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-20 22:20:26,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-20 22:20:26,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-20 22:20:26,824 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-20 22:20:26,825 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-20 22:20:26,825 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-20 22:20:26,826 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-20 22:20:26,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-20 22:20:26,827 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-20 22:20:26,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-20 22:20:26,828 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-20 22:20:26,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-20 22:20:26,829 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-20 22:20:26,830 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-20 22:20:26,830 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-20 22:20:26,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-20 22:20:26,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-20 22:20:26,832 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-20 22:20:26,833 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2022-09-20 22:20:26,850 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-20 22:20:26,851 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-20 22:20:26,851 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-20 22:20:26,852 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-20 22:20:26,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-20 22:20:26,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-20 22:20:26,852 INFO L138 SettingsManager]: * Use SBE=true [2022-09-20 22:20:26,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-20 22:20:26,853 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-20 22:20:26,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-20 22:20:26,853 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-20 22:20:26,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-20 22:20:26,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-20 22:20:26,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-20 22:20:26,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-20 22:20:26,854 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-20 22:20:26,854 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-20 22:20:26,854 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-20 22:20:26,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-20 22:20:26,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-20 22:20:26,855 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-20 22:20:26,855 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-20 22:20:26,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-20 22:20:26,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 22:20:26,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-20 22:20:26,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-20 22:20:26,856 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-20 22:20:26,857 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-20 22:20:26,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-20 22:20:26,857 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-20 22:20:26,857 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-20 22:20:26,857 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-20 22:20:27,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-20 22:20:27,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-20 22:20:27,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-20 22:20:27,118 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-20 22:20:27,119 INFO L275 PluginConnector]: CDTParser initialized [2022-09-20 22:20:27,120 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/qrcu-2.i [2022-09-20 22:20:27,178 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89741c9f2/d6f376d2e5dc4ccf9b49082098f00682/FLAG755dbbb19 [2022-09-20 22:20:27,637 INFO L306 CDTParser]: Found 1 translation units. [2022-09-20 22:20:27,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/qrcu-2.i [2022-09-20 22:20:27,655 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89741c9f2/d6f376d2e5dc4ccf9b49082098f00682/FLAG755dbbb19 [2022-09-20 22:20:27,670 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89741c9f2/d6f376d2e5dc4ccf9b49082098f00682 [2022-09-20 22:20:27,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-20 22:20:27,674 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-20 22:20:27,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-20 22:20:27,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-20 22:20:27,680 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-20 22:20:27,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 10:20:27" (1/1) ... [2022-09-20 22:20:27,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d019ef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:27, skipping insertion in model container [2022-09-20 22:20:27,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 10:20:27" (1/1) ... [2022-09-20 22:20:27,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-20 22:20:27,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-20 22:20:28,014 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/qrcu-2.i[30690,30703] [2022-09-20 22:20:28,018 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/qrcu-2.i[30912,30925] [2022-09-20 22:20:28,036 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 22:20:28,045 INFO L203 MainTranslator]: Completed pre-run [2022-09-20 22:20:28,102 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/qrcu-2.i[30690,30703] [2022-09-20 22:20:28,103 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/qrcu-2.i[30912,30925] [2022-09-20 22:20:28,126 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 22:20:28,164 INFO L208 MainTranslator]: Completed translation [2022-09-20 22:20:28,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:28 WrapperNode [2022-09-20 22:20:28,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-20 22:20:28,166 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-20 22:20:28,166 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-20 22:20:28,166 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-20 22:20:28,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:28" (1/1) ... [2022-09-20 22:20:28,201 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:28" (1/1) ... [2022-09-20 22:20:28,236 INFO L138 Inliner]: procedures = 177, calls = 44, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 262 [2022-09-20 22:20:28,236 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-20 22:20:28,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-20 22:20:28,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-20 22:20:28,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-20 22:20:28,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:28" (1/1) ... [2022-09-20 22:20:28,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:28" (1/1) ... [2022-09-20 22:20:28,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:28" (1/1) ... [2022-09-20 22:20:28,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:28" (1/1) ... [2022-09-20 22:20:28,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:28" (1/1) ... [2022-09-20 22:20:28,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:28" (1/1) ... [2022-09-20 22:20:28,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:28" (1/1) ... [2022-09-20 22:20:28,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-20 22:20:28,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-20 22:20:28,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-20 22:20:28,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-20 22:20:28,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:28" (1/1) ... [2022-09-20 22:20:28,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 22:20:28,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 22:20:28,328 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) [2022-09-20 22:20:28,333 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 [2022-09-20 22:20:28,362 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader1 [2022-09-20 22:20:28,362 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader1 [2022-09-20 22:20:28,362 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_reader2 [2022-09-20 22:20:28,362 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_reader2 [2022-09-20 22:20:28,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-20 22:20:28,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-20 22:20:28,363 INFO L130 BoogieDeclarations]: Found specification of procedure qrcu_updater [2022-09-20 22:20:28,363 INFO L138 BoogieDeclarations]: Found implementation of procedure qrcu_updater [2022-09-20 22:20:28,363 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-09-20 22:20:28,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-20 22:20:28,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-20 22:20:28,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-20 22:20:28,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-20 22:20:28,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-20 22:20:28,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-20 22:20:28,365 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-20 22:20:28,511 INFO L234 CfgBuilder]: Building ICFG [2022-09-20 22:20:28,513 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-20 22:20:28,907 INFO L275 CfgBuilder]: Performing block encoding [2022-09-20 22:20:29,038 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-20 22:20:29,038 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-09-20 22:20:29,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 10:20:29 BoogieIcfgContainer [2022-09-20 22:20:29,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-20 22:20:29,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-20 22:20:29,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-20 22:20:29,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-20 22:20:29,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 10:20:27" (1/3) ... [2022-09-20 22:20:29,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b5444e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 10:20:29, skipping insertion in model container [2022-09-20 22:20:29,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 10:20:28" (2/3) ... [2022-09-20 22:20:29,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b5444e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 10:20:29, skipping insertion in model container [2022-09-20 22:20:29,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 10:20:29" (3/3) ... [2022-09-20 22:20:29,048 INFO L112 eAbstractionObserver]: Analyzing ICFG qrcu-2.i [2022-09-20 22:20:29,064 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-20 22:20:29,064 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-09-20 22:20:29,064 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-20 22:20:29,159 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-09-20 22:20:29,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 179 transitions, 382 flow [2022-09-20 22:20:29,248 INFO L130 PetriNetUnfolder]: 18/176 cut-off events. [2022-09-20 22:20:29,248 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-09-20 22:20:29,254 INFO L83 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 316 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. [2022-09-20 22:20:29,255 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 179 transitions, 382 flow [2022-09-20 22:20:29,259 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 164 transitions, 343 flow [2022-09-20 22:20:29,267 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 22:20:29,273 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@e30b278, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 22:20:29,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-09-20 22:20:29,295 INFO L130 PetriNetUnfolder]: 9/120 cut-off events. [2022-09-20 22:20:29,295 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-09-20 22:20:29,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:20:29,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:20:29,296 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)] === [2022-09-20 22:20:29,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:20:29,301 INFO L85 PathProgramCache]: Analyzing trace with hash 925265107, now seen corresponding path program 1 times [2022-09-20 22:20:29,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:20:29,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779663027] [2022-09-20 22:20:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:20:29,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:20:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:20:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:20:29,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:20:29,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779663027] [2022-09-20 22:20:29,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779663027] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 22:20:29,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 22:20:29,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 22:20:29,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964775841] [2022-09-20 22:20:29,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 22:20:29,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 22:20:29,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:20:29,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 22:20:29,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 22:20:29,634 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 179 [2022-09-20 22:20:29,637 INFO L100 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) [2022-09-20 22:20:29,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:20:29,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 179 [2022-09-20 22:20:29,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:20:30,005 INFO L130 PetriNetUnfolder]: 629/1607 cut-off events. [2022-09-20 22:20:30,005 INFO L131 PetriNetUnfolder]: For 265/265 co-relation queries the response was YES. [2022-09-20 22:20:30,017 INFO L83 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 10510 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. [2022-09-20 22:20:30,028 INFO L137 encePairwiseOnDemand]: 170/179 looper letters, 40 selfloop transitions, 2 changer transitions 0/171 dead transitions. [2022-09-20 22:20:30,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 171 transitions, 447 flow [2022-09-20 22:20:30,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 22:20:30,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 22:20:30,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2022-09-20 22:20:30,048 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8975791433891993 [2022-09-20 22:20:30,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2022-09-20 22:20:30,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2022-09-20 22:20:30,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:20:30,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2022-09-20 22:20:30,059 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) [2022-09-20 22:20:30,067 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) [2022-09-20 22:20:30,067 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) [2022-09-20 22:20:30,069 INFO L175 Difference]: Start difference. First operand has 156 places, 164 transitions, 343 flow. Second operand 3 states and 482 transitions. [2022-09-20 22:20:30,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 171 transitions, 447 flow [2022-09-20 22:20:30,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 171 transitions, 434 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-09-20 22:20:30,078 INFO L231 Difference]: Finished difference. Result has 155 places, 159 transitions, 336 flow [2022-09-20 22:20:30,080 INFO L270 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} [2022-09-20 22:20:30,084 INFO L287 CegarLoopForPetriNet]: 156 programPoint places, -1 predicate places. [2022-09-20 22:20:30,084 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 159 transitions, 336 flow [2022-09-20 22:20:30,085 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) [2022-09-20 22:20:30,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:20:30,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:20:30,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-20 22:20:30,086 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)] === [2022-09-20 22:20:30,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:20:30,086 INFO L85 PathProgramCache]: Analyzing trace with hash 930142072, now seen corresponding path program 1 times [2022-09-20 22:20:30,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:20:30,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687495649] [2022-09-20 22:20:30,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:20:30,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:20:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:20:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:20:30,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:20:30,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687495649] [2022-09-20 22:20:30,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687495649] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 22:20:30,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 22:20:30,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 22:20:30,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901314805] [2022-09-20 22:20:30,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 22:20:30,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 22:20:30,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:20:30,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 22:20:30,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 22:20:30,263 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 179 [2022-09-20 22:20:30,263 INFO L100 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) [2022-09-20 22:20:30,264 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:20:30,264 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 179 [2022-09-20 22:20:30,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:20:30,500 INFO L130 PetriNetUnfolder]: 402/1183 cut-off events. [2022-09-20 22:20:30,500 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-09-20 22:20:30,505 INFO L83 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 7335 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. [2022-09-20 22:20:30,511 INFO L137 encePairwiseOnDemand]: 176/179 looper letters, 26 selfloop transitions, 2 changer transitions 0/168 dead transitions. [2022-09-20 22:20:30,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 168 transitions, 413 flow [2022-09-20 22:20:30,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 22:20:30,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 22:20:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2022-09-20 22:20:30,513 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9087523277467412 [2022-09-20 22:20:30,513 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2022-09-20 22:20:30,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2022-09-20 22:20:30,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:20:30,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2022-09-20 22:20:30,516 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) [2022-09-20 22:20:30,517 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) [2022-09-20 22:20:30,518 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) [2022-09-20 22:20:30,518 INFO L175 Difference]: Start difference. First operand has 155 places, 159 transitions, 336 flow. Second operand 3 states and 488 transitions. [2022-09-20 22:20:30,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 168 transitions, 413 flow [2022-09-20 22:20:30,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 168 transitions, 411 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 22:20:30,524 INFO L231 Difference]: Finished difference. Result has 157 places, 159 transitions, 342 flow [2022-09-20 22:20:30,526 INFO L270 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} [2022-09-20 22:20:30,527 INFO L287 CegarLoopForPetriNet]: 156 programPoint places, 1 predicate places. [2022-09-20 22:20:30,527 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 159 transitions, 342 flow [2022-09-20 22:20:30,529 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) [2022-09-20 22:20:30,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:20:30,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:20:30,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-20 22:20:30,529 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)] === [2022-09-20 22:20:30,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:20:30,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1230365974, now seen corresponding path program 1 times [2022-09-20 22:20:30,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:20:30,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008971398] [2022-09-20 22:20:30,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:20:30,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:20:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:20:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:20:30,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:20:30,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008971398] [2022-09-20 22:20:30,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008971398] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 22:20:30,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 22:20:30,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 22:20:30,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27704265] [2022-09-20 22:20:30,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 22:20:30,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 22:20:30,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:20:30,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 22:20:30,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 22:20:30,665 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 179 [2022-09-20 22:20:30,667 INFO L100 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) [2022-09-20 22:20:30,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:20:30,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 179 [2022-09-20 22:20:30,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:20:30,867 INFO L130 PetriNetUnfolder]: 399/1164 cut-off events. [2022-09-20 22:20:30,867 INFO L131 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2022-09-20 22:20:30,875 INFO L83 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 7146 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. [2022-09-20 22:20:30,882 INFO L137 encePairwiseOnDemand]: 176/179 looper letters, 26 selfloop transitions, 2 changer transitions 0/168 dead transitions. [2022-09-20 22:20:30,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 168 transitions, 421 flow [2022-09-20 22:20:30,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 22:20:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 22:20:30,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2022-09-20 22:20:30,884 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9087523277467412 [2022-09-20 22:20:30,884 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2022-09-20 22:20:30,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2022-09-20 22:20:30,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:20:30,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2022-09-20 22:20:30,887 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) [2022-09-20 22:20:30,889 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) [2022-09-20 22:20:30,889 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) [2022-09-20 22:20:30,889 INFO L175 Difference]: Start difference. First operand has 157 places, 159 transitions, 342 flow. Second operand 3 states and 488 transitions. [2022-09-20 22:20:30,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 168 transitions, 421 flow [2022-09-20 22:20:30,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 168 transitions, 417 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-09-20 22:20:30,895 INFO L231 Difference]: Finished difference. Result has 158 places, 159 transitions, 346 flow [2022-09-20 22:20:30,896 INFO L270 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} [2022-09-20 22:20:30,897 INFO L287 CegarLoopForPetriNet]: 156 programPoint places, 2 predicate places. [2022-09-20 22:20:30,898 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 159 transitions, 346 flow [2022-09-20 22:20:30,898 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) [2022-09-20 22:20:30,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:20:30,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:20:30,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-09-20 22:20:30,899 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)] === [2022-09-20 22:20:30,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:20:30,900 INFO L85 PathProgramCache]: Analyzing trace with hash 832172722, now seen corresponding path program 1 times [2022-09-20 22:20:30,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:20:30,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202057719] [2022-09-20 22:20:30,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:20:30,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:20:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:20:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:20:31,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:20:31,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202057719] [2022-09-20 22:20:31,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202057719] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 22:20:31,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 22:20:31,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-09-20 22:20:31,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116776965] [2022-09-20 22:20:31,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 22:20:31,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-20 22:20:31,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:20:31,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-20 22:20:31,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-09-20 22:20:31,056 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 179 [2022-09-20 22:20:31,057 INFO L100 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) [2022-09-20 22:20:31,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:20:31,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 179 [2022-09-20 22:20:31,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:20:31,547 INFO L130 PetriNetUnfolder]: 779/1795 cut-off events. [2022-09-20 22:20:31,547 INFO L131 PetriNetUnfolder]: For 162/162 co-relation queries the response was YES. [2022-09-20 22:20:31,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3171 conditions, 1795 events. 779/1795 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12163 event pairs, 130 based on Foata normal form. 96/1803 useless extension candidates. Maximal degree in co-relation 3015. Up to 959 conditions per place. [2022-09-20 22:20:31,568 INFO L137 encePairwiseOnDemand]: 161/179 looper letters, 93 selfloop transitions, 31 changer transitions 0/239 dead transitions. [2022-09-20 22:20:31,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 239 transitions, 790 flow [2022-09-20 22:20:31,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-09-20 22:20:31,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-09-20 22:20:31,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1166 transitions. [2022-09-20 22:20:31,572 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8142458100558659 [2022-09-20 22:20:31,572 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1166 transitions. [2022-09-20 22:20:31,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1166 transitions. [2022-09-20 22:20:31,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:20:31,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1166 transitions. [2022-09-20 22:20:31,575 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) [2022-09-20 22:20:31,578 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) [2022-09-20 22:20:31,579 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) [2022-09-20 22:20:31,579 INFO L175 Difference]: Start difference. First operand has 158 places, 159 transitions, 346 flow. Second operand 8 states and 1166 transitions. [2022-09-20 22:20:31,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 239 transitions, 790 flow [2022-09-20 22:20:31,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 239 transitions, 786 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-09-20 22:20:31,585 INFO L231 Difference]: Finished difference. Result has 169 places, 192 transitions, 589 flow [2022-09-20 22:20:31,585 INFO L270 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} [2022-09-20 22:20:31,587 INFO L287 CegarLoopForPetriNet]: 156 programPoint places, 13 predicate places. [2022-09-20 22:20:31,590 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 192 transitions, 589 flow [2022-09-20 22:20:31,591 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) [2022-09-20 22:20:31,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:20:31,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:20:31,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-09-20 22:20:31,594 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)] === [2022-09-20 22:20:31,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:20:31,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1585256078, now seen corresponding path program 1 times [2022-09-20 22:20:31,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:20:31,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573055253] [2022-09-20 22:20:31,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:20:31,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:20:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 22:20:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 22:20:31,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 22:20:31,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573055253] [2022-09-20 22:20:31,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573055253] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 22:20:31,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 22:20:31,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-09-20 22:20:31,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326765984] [2022-09-20 22:20:31,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 22:20:31,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-20 22:20:31,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 22:20:31,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-20 22:20:31,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-09-20 22:20:31,711 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 179 [2022-09-20 22:20:31,712 INFO L100 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) [2022-09-20 22:20:31,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 22:20:31,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 179 [2022-09-20 22:20:31,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 22:20:32,281 INFO L130 PetriNetUnfolder]: 855/1909 cut-off events. [2022-09-20 22:20:32,282 INFO L131 PetriNetUnfolder]: For 2645/2658 co-relation queries the response was YES. [2022-09-20 22:20:32,291 INFO L83 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 12906 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. [2022-09-20 22:20:32,305 INFO L137 encePairwiseOnDemand]: 158/179 looper letters, 117 selfloop transitions, 37 changer transitions 0/269 dead transitions. [2022-09-20 22:20:32,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 269 transitions, 1207 flow [2022-09-20 22:20:32,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-09-20 22:20:32,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-09-20 22:20:32,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1430 transitions. [2022-09-20 22:20:32,309 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7988826815642458 [2022-09-20 22:20:32,309 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1430 transitions. [2022-09-20 22:20:32,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1430 transitions. [2022-09-20 22:20:32,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 22:20:32,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1430 transitions. [2022-09-20 22:20:32,314 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) [2022-09-20 22:20:32,317 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) [2022-09-20 22:20:32,317 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) [2022-09-20 22:20:32,317 INFO L175 Difference]: Start difference. First operand has 169 places, 192 transitions, 589 flow. Second operand 10 states and 1430 transitions. [2022-09-20 22:20:32,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 269 transitions, 1207 flow [2022-09-20 22:20:32,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 269 transitions, 1207 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 22:20:32,334 INFO L231 Difference]: Finished difference. Result has 183 places, 208 transitions, 828 flow [2022-09-20 22:20:32,334 INFO L270 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} [2022-09-20 22:20:32,336 INFO L287 CegarLoopForPetriNet]: 156 programPoint places, 27 predicate places. [2022-09-20 22:20:32,337 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 208 transitions, 828 flow [2022-09-20 22:20:32,337 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) [2022-09-20 22:20:32,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 22:20:32,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-20 22:20:32,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-09-20 22:20:32,338 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)] === [2022-09-20 22:20:32,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 22:20:32,339 INFO L85 PathProgramCache]: Analyzing trace with hash 648760508, now seen corresponding path program 2 times [2022-09-20 22:20:32,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 22:20:32,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471421325] [2022-09-20 22:20:32,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 22:20:32,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 22:20:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-20 22:20:32,374 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-20 22:20:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-20 22:20:32,436 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-20 22:20:32,436 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-09-20 22:20:32,437 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location qrcu_updaterErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2022-09-20 22:20:32,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location qrcu_updaterErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-09-20 22:20:32,439 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location qrcu_updaterErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-09-20 22:20:32,439 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2022-09-20 22:20:32,439 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2022-09-20 22:20:32,439 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2022-09-20 22:20:32,439 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location qrcu_updaterErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-09-20 22:20:32,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-09-20 22:20:32,440 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2022-09-20 22:20:32,445 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-09-20 22:20:32,445 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-09-20 22:20:32,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 10:20:32 BasicIcfg [2022-09-20 22:20:32,541 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-09-20 22:20:32,542 INFO L158 Benchmark]: Toolchain (without parser) took 4867.24ms. Allocated memory was 187.7MB in the beginning and 355.5MB in the end (delta: 167.8MB). Free memory was 128.2MB in the beginning and 231.9MB in the end (delta: -103.7MB). Peak memory consumption was 64.1MB. Max. memory is 8.0GB. [2022-09-20 22:20:32,542 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 187.7MB. Free memory is still 146.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-09-20 22:20:32,543 INFO L158 Benchmark]: CACSL2BoogieTranslator took 487.99ms. Allocated memory was 187.7MB in the beginning and 252.7MB in the end (delta: 65.0MB). Free memory was 128.0MB in the beginning and 210.3MB in the end (delta: -82.4MB). Peak memory consumption was 7.8MB. Max. memory is 8.0GB. [2022-09-20 22:20:32,543 INFO L158 Benchmark]: Boogie Procedure Inliner took 70.68ms. Allocated memory is still 252.7MB. Free memory was 210.3MB in the beginning and 207.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2022-09-20 22:20:32,543 INFO L158 Benchmark]: Boogie Preprocessor took 51.58ms. Allocated memory is still 252.7MB. Free memory was 207.3MB in the beginning and 205.5MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-09-20 22:20:32,544 INFO L158 Benchmark]: RCFGBuilder took 751.50ms. Allocated memory is still 252.7MB. Free memory was 205.5MB in the beginning and 173.0MB in the end (delta: 32.5MB). Peak memory consumption was 32.5MB. Max. memory is 8.0GB. [2022-09-20 22:20:32,544 INFO L158 Benchmark]: TraceAbstraction took 3498.72ms. Allocated memory was 252.7MB in the beginning and 355.5MB in the end (delta: 102.8MB). Free memory was 172.3MB in the beginning and 231.9MB in the end (delta: -59.6MB). Peak memory consumption was 44.4MB. Max. memory is 8.0GB. [2022-09-20 22:20:32,547 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 187.7MB. Free memory is still 146.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 487.99ms. Allocated memory was 187.7MB in the beginning and 252.7MB in the end (delta: 65.0MB). Free memory was 128.0MB in the beginning and 210.3MB in the end (delta: -82.4MB). Peak memory consumption was 7.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 70.68ms. Allocated memory is still 252.7MB. Free memory was 210.3MB in the beginning and 207.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 51.58ms. Allocated memory is still 252.7MB. Free memory was 207.3MB in the beginning and 205.5MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 751.50ms. Allocated memory is still 252.7MB. Free memory was 205.5MB in the beginning and 173.0MB in the end (delta: 32.5MB). Peak memory consumption was 32.5MB. Max. memory is 8.0GB. * TraceAbstraction took 3498.72ms. Allocated memory was 252.7MB in the beginning and 355.5MB in the end (delta: 102.8MB). Free memory was 172.3MB in the beginning and 231.9MB in the end (delta: -59.6MB). Peak memory consumption was 44.4MB. Max. memory is 8.0GB. * 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)=-2, readerprogress1=0, readerprogress2=0, t1={6:0}, t2={7:0}, t3={5:0}] [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] [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)=-1, 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)=0, 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] [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: 3.3s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 176 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 176 mSDsluCounter, 106 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 214 mSDsCounter, 52 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 765 IncrementalHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 52 mSolverCounterUnsat, 59 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, 0.5s 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! [2022-09-20 22:20:32,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...