/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-RepeatedSemanticLbe.epf --traceabstraction.use.on-demand.petri.net.difference true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-13 03:37:32,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 03:37:32,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 03:37:32,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 03:37:32,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 03:37:32,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 03:37:32,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 03:37:32,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 03:37:32,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 03:37:32,659 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 03:37:32,660 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 03:37:32,662 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 03:37:32,662 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 03:37:32,664 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 03:37:32,665 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 03:37:32,667 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 03:37:32,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 03:37:32,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 03:37:32,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 03:37:32,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 03:37:32,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 03:37:32,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 03:37:32,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 03:37:32,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 03:37:32,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 03:37:32,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 03:37:32,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 03:37:32,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 03:37:32,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 03:37:32,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 03:37:32,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 03:37:32,688 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 03:37:32,689 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 03:37:32,689 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 03:37:32,690 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 03:37:32,690 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 03:37:32,690 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 03:37:32,690 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 03:37:32,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 03:37:32,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 03:37:32,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 03:37:32,692 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-RepeatedSemanticLbe.epf [2022-12-13 03:37:32,718 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 03:37:32,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 03:37:32,720 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 03:37:32,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 03:37:32,720 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 03:37:32,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 03:37:32,721 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 03:37:32,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 03:37:32,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 03:37:32,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 03:37:32,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 03:37:32,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 03:37:32,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 03:37:32,722 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 03:37:32,722 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 03:37:32,722 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 03:37:32,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 03:37:32,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 03:37:32,723 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 03:37:32,723 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-13 03:37:32,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 03:37:32,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 03:37:32,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 03:37:32,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 03:37:32,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 03:37:32,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 03:37:32,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 03:37:32,724 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=REPEATED_LIPTON_PN [2022-12-13 03:37:32,724 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true [2022-12-13 03:37:32,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 03:37:33,006 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 03:37:33,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 03:37:33,009 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 03:37:33,009 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 03:37:33,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2022-12-13 03:37:33,919 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 03:37:34,145 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 03:37:34,146 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2022-12-13 03:37:34,155 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a063cf92/e01a691739b04f2ab2751543814e6c2a/FLAG616c2cb22 [2022-12-13 03:37:34,165 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a063cf92/e01a691739b04f2ab2751543814e6c2a [2022-12-13 03:37:34,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 03:37:34,168 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-13 03:37:34,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 03:37:34,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 03:37:34,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 03:37:34,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:37:34" (1/1) ... [2022-12-13 03:37:34,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c0c4451 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:37:34, skipping insertion in model container [2022-12-13 03:37:34,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:37:34" (1/1) ... [2022-12-13 03:37:34,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 03:37:34,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 03:37:34,314 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-12-13 03:37:34,547 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 03:37:34,555 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 03:37:34,564 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2022-12-13 03:37:34,606 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 03:37:34,664 INFO L208 MainTranslator]: Completed translation [2022-12-13 03:37:34,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:37:34 WrapperNode [2022-12-13 03:37:34,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 03:37:34,666 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 03:37:34,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 03:37:34,667 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 03:37:34,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:37:34" (1/1) ... [2022-12-13 03:37:34,696 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:37:34" (1/1) ... [2022-12-13 03:37:34,714 INFO L138 Inliner]: procedures = 364, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2022-12-13 03:37:34,714 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 03:37:34,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 03:37:34,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 03:37:34,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 03:37:34,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:37:34" (1/1) ... [2022-12-13 03:37:34,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:37:34" (1/1) ... [2022-12-13 03:37:34,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:37:34" (1/1) ... [2022-12-13 03:37:34,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:37:34" (1/1) ... [2022-12-13 03:37:34,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:37:34" (1/1) ... [2022-12-13 03:37:34,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:37:34" (1/1) ... [2022-12-13 03:37:34,739 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:37:34" (1/1) ... [2022-12-13 03:37:34,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:37:34" (1/1) ... [2022-12-13 03:37:34,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 03:37:34,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 03:37:34,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 03:37:34,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 03:37:34,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:37:34" (1/1) ... [2022-12-13 03:37:34,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 03:37:34,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 03:37:34,769 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) [2022-12-13 03:37:34,786 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 [2022-12-13 03:37:34,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 03:37:34,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 03:37:34,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 03:37:34,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 03:37:34,809 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 03:37:34,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 03:37:34,809 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2022-12-13 03:37:34,809 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2022-12-13 03:37:34,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 03:37:34,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 03:37:34,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 03:37:34,810 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-13 03:37:34,944 INFO L236 CfgBuilder]: Building ICFG [2022-12-13 03:37:34,946 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 03:37:35,088 INFO L277 CfgBuilder]: Performing block encoding [2022-12-13 03:37:35,094 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 03:37:35,094 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 03:37:35,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:37:35 BoogieIcfgContainer [2022-12-13 03:37:35,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 03:37:35,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 03:37:35,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 03:37:35,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 03:37:35,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:37:34" (1/3) ... [2022-12-13 03:37:35,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@292573b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:37:35, skipping insertion in model container [2022-12-13 03:37:35,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:37:34" (2/3) ... [2022-12-13 03:37:35,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@292573b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:37:35, skipping insertion in model container [2022-12-13 03:37:35,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:37:35" (3/3) ... [2022-12-13 03:37:35,101 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2022-12-13 03:37:35,117 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 03:37:35,117 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 03:37:35,117 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 03:37:35,180 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 03:37:35,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 86 transitions, 180 flow [2022-12-13 03:37:35,241 INFO L130 PetriNetUnfolder]: 7/85 cut-off events. [2022-12-13 03:37:35,241 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 03:37:35,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 7/85 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2022-12-13 03:37:35,246 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 86 transitions, 180 flow [2022-12-13 03:37:35,249 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 77 transitions, 160 flow [2022-12-13 03:37:35,250 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 03:37:35,262 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 77 transitions, 160 flow [2022-12-13 03:37:35,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 77 transitions, 160 flow [2022-12-13 03:37:35,280 INFO L130 PetriNetUnfolder]: 6/77 cut-off events. [2022-12-13 03:37:35,280 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 03:37:35,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 77 events. 6/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 77 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 38. Up to 2 conditions per place. [2022-12-13 03:37:35,282 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 77 transitions, 160 flow [2022-12-13 03:37:35,282 INFO L226 LiptonReduction]: Number of co-enabled transitions 722 [2022-12-13 03:37:36,947 INFO L241 LiptonReduction]: Total number of compositions: 62 [2022-12-13 03:37:36,958 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 03:37:36,963 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=REPEATED_LIPTON_PN, 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;@738c7d18, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-13 03:37:36,963 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 03:37:36,966 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-12-13 03:37:36,966 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 03:37:36,966 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 03:37:36,967 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 03:37:36,967 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 03:37:36,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 03:37:36,971 INFO L85 PathProgramCache]: Analyzing trace with hash 89472530, now seen corresponding path program 1 times [2022-12-13 03:37:36,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 03:37:36,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099093779] [2022-12-13 03:37:36,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 03:37:36,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 03:37:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 03:37:37,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 03:37:37,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 03:37:37,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099093779] [2022-12-13 03:37:37,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099093779] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 03:37:37,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 03:37:37,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 03:37:37,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843882331] [2022-12-13 03:37:37,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 03:37:37,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 03:37:37,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 03:37:37,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 03:37:37,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 03:37:37,252 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-13 03:37:37,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 15 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-12-13 03:37:37,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 03:37:37,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-13 03:37:37,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 03:37:37,312 INFO L130 PetriNetUnfolder]: 41/86 cut-off events. [2022-12-13 03:37:37,312 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 03:37:37,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 86 events. 41/86 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 206 event pairs, 15 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 162. Up to 53 conditions per place. [2022-12-13 03:37:37,314 INFO L137 encePairwiseOnDemand]: 12/15 looper letters, 20 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2022-12-13 03:37:37,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 23 transitions, 96 flow [2022-12-13 03:37:37,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 03:37:37,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 03:37:37,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 26 transitions. [2022-12-13 03:37:37,322 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2022-12-13 03:37:37,324 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 2 predicate places. [2022-12-13 03:37:37,325 INFO L82 GeneralOperation]: Start removeDead. Operand has 19 places, 23 transitions, 96 flow [2022-12-13 03:37:37,325 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 23 transitions, 96 flow [2022-12-13 03:37:37,326 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 03:37:37,327 INFO L89 Accepts]: Start accepts. Operand has 19 places, 23 transitions, 96 flow [2022-12-13 03:37:37,329 INFO L95 Accepts]: Finished accepts. [2022-12-13 03:37:37,329 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 03:37:37,329 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 19 places, 23 transitions, 96 flow [2022-12-13 03:37:37,334 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 19 places, 23 transitions, 96 flow [2022-12-13 03:37:37,334 INFO L226 LiptonReduction]: Number of co-enabled transitions 20 [2022-12-13 03:37:37,339 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 03:37:37,341 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 15 [2022-12-13 03:37:37,344 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 23 transitions, 96 flow [2022-12-13 03:37:37,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-12-13 03:37:37,344 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 03:37:37,345 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 03:37:37,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 03:37:37,345 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 03:37:37,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 03:37:37,346 INFO L85 PathProgramCache]: Analyzing trace with hash -683595234, now seen corresponding path program 1 times [2022-12-13 03:37:37,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 03:37:37,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200554675] [2022-12-13 03:37:37,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 03:37:37,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 03:37:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 03:37:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 03:37:37,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 03:37:37,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200554675] [2022-12-13 03:37:37,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200554675] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 03:37:37,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 03:37:37,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 03:37:37,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834519168] [2022-12-13 03:37:37,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 03:37:37,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 03:37:37,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 03:37:37,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 03:37:37,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 03:37:37,450 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-13 03:37:37,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 23 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-12-13 03:37:37,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 03:37:37,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-13 03:37:37,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 03:37:37,486 INFO L130 PetriNetUnfolder]: 61/136 cut-off events. [2022-12-13 03:37:37,487 INFO L131 PetriNetUnfolder]: For 14/16 co-relation queries the response was YES. [2022-12-13 03:37:37,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 136 events. 61/136 cut-off events. For 14/16 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 438 event pairs, 15 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 372. Up to 85 conditions per place. [2022-12-13 03:37:37,488 INFO L137 encePairwiseOnDemand]: 12/15 looper letters, 32 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2022-12-13 03:37:37,488 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 37 transitions, 224 flow [2022-12-13 03:37:37,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 03:37:37,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 03:37:37,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 26 transitions. [2022-12-13 03:37:37,489 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2022-12-13 03:37:37,489 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 4 predicate places. [2022-12-13 03:37:37,489 INFO L82 GeneralOperation]: Start removeDead. Operand has 21 places, 37 transitions, 224 flow [2022-12-13 03:37:37,490 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 37 transitions, 224 flow [2022-12-13 03:37:37,491 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 03:37:37,491 INFO L89 Accepts]: Start accepts. Operand has 21 places, 37 transitions, 224 flow [2022-12-13 03:37:37,492 INFO L95 Accepts]: Finished accepts. [2022-12-13 03:37:37,492 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 03:37:37,492 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 21 places, 37 transitions, 224 flow [2022-12-13 03:37:37,493 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 21 places, 37 transitions, 224 flow [2022-12-13 03:37:37,493 INFO L226 LiptonReduction]: Number of co-enabled transitions 40 [2022-12-13 03:37:37,496 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 03:37:37,497 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 6 [2022-12-13 03:37:37,497 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 37 transitions, 224 flow [2022-12-13 03:37:37,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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) [2022-12-13 03:37:37,497 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 03:37:37,498 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 03:37:37,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 03:37:37,498 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 03:37:37,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 03:37:37,498 INFO L85 PathProgramCache]: Analyzing trace with hash -549513920, now seen corresponding path program 1 times [2022-12-13 03:37:37,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 03:37:37,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021733507] [2022-12-13 03:37:37,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 03:37:37,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 03:37:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 03:37:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 03:37:37,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 03:37:37,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021733507] [2022-12-13 03:37:37,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021733507] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 03:37:37,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989994243] [2022-12-13 03:37:37,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 03:37:37,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 03:37:37,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 03:37:37,559 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 03:37:37,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 03:37:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 03:37:37,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 03:37:37,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 03:37:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 03:37:37,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 03:37:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 03:37:37,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989994243] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 03:37:37,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 03:37:37,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-12-13 03:37:37,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373306350] [2022-12-13 03:37:37,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 03:37:37,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 03:37:37,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 03:37:37,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 03:37:37,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 03:37:37,772 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-13 03:37:37,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 37 transitions, 224 flow. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 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) [2022-12-13 03:37:37,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 03:37:37,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-13 03:37:37,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 03:37:37,937 INFO L130 PetriNetUnfolder]: 153/320 cut-off events. [2022-12-13 03:37:37,938 INFO L131 PetriNetUnfolder]: For 47/59 co-relation queries the response was YES. [2022-12-13 03:37:37,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 320 events. 153/320 cut-off events. For 47/59 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1082 event pairs, 6 based on Foata normal form. 4/297 useless extension candidates. Maximal degree in co-relation 1228. Up to 245 conditions per place. [2022-12-13 03:37:37,940 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 68 selfloop transitions, 33 changer transitions 0/102 dead transitions. [2022-12-13 03:37:37,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 102 transitions, 816 flow [2022-12-13 03:37:37,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 03:37:37,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-13 03:37:37,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 131 transitions. [2022-12-13 03:37:37,942 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5458333333333333 [2022-12-13 03:37:37,943 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 19 predicate places. [2022-12-13 03:37:37,943 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 102 transitions, 816 flow [2022-12-13 03:37:37,945 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 102 transitions, 816 flow [2022-12-13 03:37:37,947 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 03:37:37,947 INFO L89 Accepts]: Start accepts. Operand has 36 places, 102 transitions, 816 flow [2022-12-13 03:37:37,949 INFO L95 Accepts]: Finished accepts. [2022-12-13 03:37:37,949 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 03:37:37,949 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 36 places, 102 transitions, 816 flow [2022-12-13 03:37:37,952 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 36 places, 102 transitions, 816 flow [2022-12-13 03:37:37,952 INFO L226 LiptonReduction]: Number of co-enabled transitions 114 [2022-12-13 03:37:37,955 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 03:37:37,956 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 9 [2022-12-13 03:37:37,956 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 102 transitions, 816 flow [2022-12-13 03:37:37,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 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) [2022-12-13 03:37:37,956 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 03:37:37,956 INFO L214 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 03:37:37,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 03:37:38,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 03:37:38,161 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 03:37:38,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 03:37:38,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1340245540, now seen corresponding path program 2 times [2022-12-13 03:37:38,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 03:37:38,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529858180] [2022-12-13 03:37:38,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 03:37:38,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 03:37:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 03:37:38,301 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 03:37:38,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 03:37:38,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529858180] [2022-12-13 03:37:38,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529858180] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 03:37:38,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180367165] [2022-12-13 03:37:38,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 03:37:38,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 03:37:38,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 03:37:38,309 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 03:37:38,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 03:37:38,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 03:37:38,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 03:37:38,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 03:37:38,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 03:37:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 03:37:38,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 03:37:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 03:37:38,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180367165] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 03:37:38,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 03:37:38,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-13 03:37:38,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831307755] [2022-12-13 03:37:38,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 03:37:38,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 03:37:38,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 03:37:38,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 03:37:38,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-12-13 03:37:38,531 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-13 03:37:38,532 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 102 transitions, 816 flow. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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) [2022-12-13 03:37:38,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 03:37:38,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-13 03:37:38,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 03:37:38,693 INFO L130 PetriNetUnfolder]: 286/612 cut-off events. [2022-12-13 03:37:38,693 INFO L131 PetriNetUnfolder]: For 235/239 co-relation queries the response was YES. [2022-12-13 03:37:38,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2917 conditions, 612 events. 286/612 cut-off events. For 235/239 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2524 event pairs, 4 based on Foata normal form. 0/578 useless extension candidates. Maximal degree in co-relation 2888. Up to 499 conditions per place. [2022-12-13 03:37:38,699 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 172 selfloop transitions, 40 changer transitions 0/213 dead transitions. [2022-12-13 03:37:38,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 213 transitions, 2128 flow [2022-12-13 03:37:38,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 03:37:38,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-13 03:37:38,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 73 transitions. [2022-12-13 03:37:38,702 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2022-12-13 03:37:38,703 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 26 predicate places. [2022-12-13 03:37:38,703 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 213 transitions, 2128 flow [2022-12-13 03:37:38,706 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 213 transitions, 2128 flow [2022-12-13 03:37:38,713 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 03:37:38,714 INFO L89 Accepts]: Start accepts. Operand has 43 places, 213 transitions, 2128 flow [2022-12-13 03:37:38,717 INFO L95 Accepts]: Finished accepts. [2022-12-13 03:37:38,717 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 03:37:38,717 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 43 places, 213 transitions, 2128 flow [2022-12-13 03:37:38,723 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 43 places, 213 transitions, 2128 flow [2022-12-13 03:37:38,723 INFO L226 LiptonReduction]: Number of co-enabled transitions 228 [2022-12-13 03:37:38,733 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 03:37:38,734 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 21 [2022-12-13 03:37:38,734 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 213 transitions, 2128 flow [2022-12-13 03:37:38,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 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) [2022-12-13 03:37:38,734 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 03:37:38,734 INFO L214 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 03:37:38,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 03:37:38,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-13 03:37:38,940 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 03:37:38,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 03:37:38,940 INFO L85 PathProgramCache]: Analyzing trace with hash -567710074, now seen corresponding path program 3 times [2022-12-13 03:37:38,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 03:37:38,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377224073] [2022-12-13 03:37:38,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 03:37:38,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 03:37:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 03:37:39,076 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 03:37:39,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 03:37:39,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377224073] [2022-12-13 03:37:39,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377224073] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 03:37:39,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294119468] [2022-12-13 03:37:39,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 03:37:39,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 03:37:39,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 03:37:39,078 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 03:37:39,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 03:37:39,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 03:37:39,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 03:37:39,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 03:37:39,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 03:37:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 03:37:39,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 03:37:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 03:37:39,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294119468] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 03:37:39,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 03:37:39,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2022-12-13 03:37:39,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191737336] [2022-12-13 03:37:39,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 03:37:39,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 03:37:39,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 03:37:39,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 03:37:39,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2022-12-13 03:37:39,355 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-13 03:37:39,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 213 transitions, 2128 flow. Second operand has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 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) [2022-12-13 03:37:39,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 03:37:39,356 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-13 03:37:39,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 03:37:40,685 INFO L130 PetriNetUnfolder]: 775/1640 cut-off events. [2022-12-13 03:37:40,685 INFO L131 PetriNetUnfolder]: For 893/901 co-relation queries the response was YES. [2022-12-13 03:37:40,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9410 conditions, 1640 events. 775/1640 cut-off events. For 893/901 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 7917 event pairs, 4 based on Foata normal form. 2/1581 useless extension candidates. Maximal degree in co-relation 9376. Up to 1409 conditions per place. [2022-12-13 03:37:40,699 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 484 selfloop transitions, 256 changer transitions 0/741 dead transitions. [2022-12-13 03:37:40,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 741 transitions, 8888 flow [2022-12-13 03:37:40,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-12-13 03:37:40,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2022-12-13 03:37:40,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 694 transitions. [2022-12-13 03:37:40,714 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5198501872659176 [2022-12-13 03:37:40,716 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 114 predicate places. [2022-12-13 03:37:40,716 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 741 transitions, 8888 flow [2022-12-13 03:37:40,739 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 741 transitions, 8888 flow [2022-12-13 03:37:40,823 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 03:37:40,824 INFO L89 Accepts]: Start accepts. Operand has 131 places, 741 transitions, 8888 flow [2022-12-13 03:37:40,834 INFO L95 Accepts]: Finished accepts. [2022-12-13 03:37:40,834 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 03:37:40,834 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 131 places, 741 transitions, 8888 flow [2022-12-13 03:37:40,882 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 131 places, 741 transitions, 8888 flow [2022-12-13 03:37:40,882 INFO L226 LiptonReduction]: Number of co-enabled transitions 688 [2022-12-13 03:37:40,926 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 03:37:40,926 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 103 [2022-12-13 03:37:40,927 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 741 transitions, 8888 flow [2022-12-13 03:37:40,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 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) [2022-12-13 03:37:40,927 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 03:37:40,927 INFO L214 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 03:37:40,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 03:37:41,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 03:37:41,137 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 03:37:41,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 03:37:41,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1800207244, now seen corresponding path program 4 times [2022-12-13 03:37:41,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 03:37:41,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501141367] [2022-12-13 03:37:41,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 03:37:41,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 03:37:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 03:37:41,297 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 10 proven. 70 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-12-13 03:37:41,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 03:37:41,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501141367] [2022-12-13 03:37:41,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501141367] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 03:37:41,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881405669] [2022-12-13 03:37:41,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 03:37:41,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 03:37:41,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 03:37:41,313 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 03:37:41,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 03:37:41,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 03:37:41,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 03:37:41,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 03:37:41,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 03:37:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-13 03:37:41,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 03:37:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-13 03:37:41,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881405669] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 03:37:41,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 03:37:41,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2022-12-13 03:37:41,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142757840] [2022-12-13 03:37:41,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 03:37:41,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 03:37:41,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 03:37:41,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 03:37:41,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2022-12-13 03:37:41,783 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-13 03:37:41,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 741 transitions, 8888 flow. Second operand has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 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) [2022-12-13 03:37:41,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 03:37:41,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-13 03:37:41,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 03:37:45,974 INFO L130 PetriNetUnfolder]: 1661/3459 cut-off events. [2022-12-13 03:37:45,974 INFO L131 PetriNetUnfolder]: For 2041/2047 co-relation queries the response was YES. [2022-12-13 03:37:45,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23414 conditions, 3459 events. 1661/3459 cut-off events. For 2041/2047 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 17865 event pairs, 4 based on Foata normal form. 2/3358 useless extension candidates. Maximal degree in co-relation 23375. Up to 3165 conditions per place. [2022-12-13 03:37:46,003 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 1143 selfloop transitions, 597 changer transitions 0/1741 dead transitions. [2022-12-13 03:37:46,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 1741 transitions, 24368 flow [2022-12-13 03:37:46,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-12-13 03:37:46,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2022-12-13 03:37:46,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 1472 transitions. [2022-12-13 03:37:46,019 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5164912280701754 [2022-12-13 03:37:46,021 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 303 predicate places. [2022-12-13 03:37:46,021 INFO L82 GeneralOperation]: Start removeDead. Operand has 320 places, 1741 transitions, 24368 flow [2022-12-13 03:37:46,046 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 320 places, 1741 transitions, 24368 flow [2022-12-13 03:37:46,202 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 03:37:46,202 INFO L89 Accepts]: Start accepts. Operand has 320 places, 1741 transitions, 24368 flow [2022-12-13 03:37:46,247 INFO L95 Accepts]: Finished accepts. [2022-12-13 03:37:46,247 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 03:37:46,247 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 320 places, 1741 transitions, 24368 flow [2022-12-13 03:37:46,357 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 320 places, 1741 transitions, 24368 flow [2022-12-13 03:37:46,358 INFO L226 LiptonReduction]: Number of co-enabled transitions 1494 [2022-12-13 03:37:46,482 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 03:37:46,483 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 281 [2022-12-13 03:37:46,484 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 1741 transitions, 24368 flow [2022-12-13 03:37:46,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.7) internal successors, (141), 30 states have internal predecessors, (141), 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) [2022-12-13 03:37:46,485 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 03:37:46,485 INFO L214 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 03:37:46,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 03:37:46,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 03:37:46,690 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 03:37:46,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 03:37:46,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1799056124, now seen corresponding path program 5 times [2022-12-13 03:37:46,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 03:37:46,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62844415] [2022-12-13 03:37:46,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 03:37:46,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 03:37:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 03:37:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 20 proven. 92 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-12-13 03:37:46,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 03:37:46,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62844415] [2022-12-13 03:37:46,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62844415] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 03:37:46,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739219568] [2022-12-13 03:37:46,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 03:37:46,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 03:37:46,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 03:37:46,948 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 03:37:46,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 03:37:47,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2022-12-13 03:37:47,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 03:37:47,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 03:37:47,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 03:37:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 20 proven. 92 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-12-13 03:37:47,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 03:37:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 20 proven. 92 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-12-13 03:37:47,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739219568] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 03:37:47,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 03:37:47,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-12-13 03:37:47,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587932016] [2022-12-13 03:37:47,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 03:37:47,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 03:37:47,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 03:37:47,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 03:37:47,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2022-12-13 03:37:47,453 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-13 03:37:47,453 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 1741 transitions, 24368 flow. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 21 states have internal predecessors, (75), 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) [2022-12-13 03:37:47,453 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 03:37:47,453 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-13 03:37:47,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 03:37:49,355 INFO L130 PetriNetUnfolder]: 3238/6604 cut-off events. [2022-12-13 03:37:49,355 INFO L131 PetriNetUnfolder]: For 2647/2647 co-relation queries the response was YES. [2022-12-13 03:37:49,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51962 conditions, 6604 events. 3238/6604 cut-off events. For 2647/2647 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 39203 event pairs, 4 based on Foata normal form. 0/6482 useless extension candidates. Maximal degree in co-relation 51918. Up to 6167 conditions per place. [2022-12-13 03:37:49,390 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 3280 selfloop transitions, 740 changer transitions 0/4021 dead transitions. [2022-12-13 03:37:49,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 4021 transitions, 64328 flow [2022-12-13 03:37:49,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 03:37:49,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-13 03:37:49,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 187 transitions. [2022-12-13 03:37:49,392 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6233333333333333 [2022-12-13 03:37:49,392 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 322 predicate places. [2022-12-13 03:37:49,392 INFO L82 GeneralOperation]: Start removeDead. Operand has 339 places, 4021 transitions, 64328 flow [2022-12-13 03:37:49,474 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 339 places, 4021 transitions, 64328 flow [2022-12-13 03:37:49,981 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 03:37:49,981 INFO L89 Accepts]: Start accepts. Operand has 339 places, 4021 transitions, 64328 flow [2022-12-13 03:37:50,084 INFO L95 Accepts]: Finished accepts. [2022-12-13 03:37:50,085 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 03:37:50,085 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 339 places, 4021 transitions, 64328 flow [2022-12-13 03:37:50,621 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 339 places, 4021 transitions, 64328 flow [2022-12-13 03:37:50,621 INFO L226 LiptonReduction]: Number of co-enabled transitions 2988 [2022-12-13 03:37:50,933 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 03:37:50,934 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 954 [2022-12-13 03:37:50,934 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 4021 transitions, 64328 flow [2022-12-13 03:37:50,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 21 states have internal predecessors, (75), 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) [2022-12-13 03:37:50,934 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 03:37:50,934 INFO L214 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 03:37:50,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 03:37:51,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 03:37:51,141 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 03:37:51,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 03:37:51,141 INFO L85 PathProgramCache]: Analyzing trace with hash 985767548, now seen corresponding path program 6 times [2022-12-13 03:37:51,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 03:37:51,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729790015] [2022-12-13 03:37:51,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 03:37:51,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 03:37:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 03:37:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 20 proven. 477 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-12-13 03:37:51,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 03:37:51,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729790015] [2022-12-13 03:37:51,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729790015] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 03:37:51,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668421401] [2022-12-13 03:37:51,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 03:37:51,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 03:37:51,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 03:37:51,567 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 03:37:51,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 03:37:51,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-12-13 03:37:51,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 03:37:51,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 03:37:51,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 03:37:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 20 proven. 477 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-12-13 03:37:52,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 03:37:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 20 proven. 477 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-12-13 03:37:52,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668421401] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 03:37:52,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 03:37:52,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 23 [2022-12-13 03:37:52,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429677850] [2022-12-13 03:37:52,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 03:37:52,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 03:37:52,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 03:37:52,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 03:37:52,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-12-13 03:37:52,257 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-13 03:37:52,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 4021 transitions, 64328 flow. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 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) [2022-12-13 03:37:52,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 03:37:52,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-13 03:37:52,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 03:37:56,127 INFO L130 PetriNetUnfolder]: 3570/7282 cut-off events. [2022-12-13 03:37:56,128 INFO L131 PetriNetUnfolder]: For 3921/3921 co-relation queries the response was YES. [2022-12-13 03:37:56,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64431 conditions, 7282 events. 3570/7282 cut-off events. For 3921/3921 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 43844 event pairs, 4 based on Foata normal form. 0/7156 useless extension candidates. Maximal degree in co-relation 64382. Up to 6811 conditions per place. [2022-12-13 03:37:56,166 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 3686 selfloop transitions, 814 changer transitions 0/4501 dead transitions. [2022-12-13 03:37:56,166 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 4501 transitions, 81008 flow [2022-12-13 03:37:56,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 03:37:56,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-13 03:37:56,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 197 transitions. [2022-12-13 03:37:56,167 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5969696969696969 [2022-12-13 03:37:56,168 INFO L295 CegarLoopForPetriNet]: 17 programPoint places, 343 predicate places. [2022-12-13 03:37:56,168 INFO L82 GeneralOperation]: Start removeDead. Operand has 360 places, 4501 transitions, 81008 flow [2022-12-13 03:37:56,225 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 360 places, 4501 transitions, 81008 flow [2022-12-13 03:37:56,800 WARN L178 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-13 03:37:56,800 INFO L89 Accepts]: Start accepts. Operand has 360 places, 4501 transitions, 81008 flow [2022-12-13 03:37:56,911 INFO L95 Accepts]: Finished accepts. [2022-12-13 03:37:56,911 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-13 03:37:56,911 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 360 places, 4501 transitions, 81008 flow [2022-12-13 03:37:57,528 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 360 places, 4501 transitions, 81008 flow [2022-12-13 03:37:57,529 INFO L226 LiptonReduction]: Number of co-enabled transitions 3320 [2022-12-13 03:37:57,787 INFO L241 LiptonReduction]: Total number of compositions: 0 [2022-12-13 03:37:57,788 INFO L158 eatedLiptonReduction]: Time needed for LBE in milliseconds: 988 [2022-12-13 03:37:57,788 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 4501 transitions, 81008 flow [2022-12-13 03:37:57,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 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) [2022-12-13 03:37:57,789 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-13 03:37:57,789 INFO L214 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 03:37:57,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 03:37:57,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 03:37:57,995 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 03:37:57,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 03:37:57,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1743254716, now seen corresponding path program 7 times [2022-12-13 03:37:57,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 03:37:57,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600241636] [2022-12-13 03:37:57,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 03:37:57,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 03:37:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 03:38:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 03:38:00,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 03:38:00,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600241636] [2022-12-13 03:38:00,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600241636] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 03:38:00,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728469817] [2022-12-13 03:38:00,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 03:38:00,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 03:38:00,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-13 03:38:00,504 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 03:38:00,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 03:38:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 03:38:00,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 128 conjunts are in the unsatisfiable core [2022-12-13 03:38:00,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 03:38:00,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 03:38:00,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 03:38:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 03:38:01,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728469817] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 03:38:01,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 03:38:01,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2022-12-13 03:38:01,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264173836] [2022-12-13 03:38:01,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 03:38:01,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-13 03:38:01,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 03:38:01,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-13 03:38:01,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2022-12-13 03:38:01,360 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-13 03:38:01,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 4501 transitions, 81008 flow. Second operand has 63 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 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) [2022-12-13 03:38:01,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 03:38:01,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-13 03:38:01,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand