/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-RepeatedSemanticLbeWithPredicates.epf -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-8d0d62b [2022-12-06 04:55:41,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-06 04:55:41,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-06 04:55:41,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-06 04:55:41,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-06 04:55:41,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-06 04:55:41,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-06 04:55:41,231 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-06 04:55:41,232 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-06 04:55:41,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-06 04:55:41,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-06 04:55:41,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-06 04:55:41,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-06 04:55:41,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-06 04:55:41,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-06 04:55:41,242 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-06 04:55:41,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-06 04:55:41,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-06 04:55:41,249 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-06 04:55:41,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-06 04:55:41,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-06 04:55:41,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-06 04:55:41,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-06 04:55:41,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-06 04:55:41,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-12-06 04:55:41,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-06 04:55:41,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-06 04:55:41,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-06 04:55:41,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-06 04:55:41,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-06 04:55:41,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-06 04:55:41,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-06 04:55:41,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-06 04:55:41,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-06 04:55:41,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-06 04:55:41,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-06 04:55:41,268 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-RepeatedSemanticLbeWithPredicates.epf [2022-12-06 04:55:41,287 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-06 04:55:41,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-06 04:55:41,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-06 04:55:41,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-06 04:55:41,288 INFO L138 SettingsManager]: * Use SBE=true [2022-12-06 04:55:41,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-06 04:55:41,288 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-06 04:55:41,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-06 04:55:41,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-06 04:55:41,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-06 04:55:41,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-06 04:55:41,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-06 04:55:41,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-06 04:55:41,289 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-06 04:55:41,289 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-06 04:55:41,289 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-06 04:55:41,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-06 04:55:41,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-06 04:55:41,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-06 04:55:41,290 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-06 04:55:41,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-06 04:55:41,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-06 04:55:41,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-06 04:55:41,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-06 04:55:41,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-06 04:55:41,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-06 04:55:41,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-06 04:55:41,291 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=REPEATED_LIPTON_PN [2022-12-06 04:55:41,291 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-06 04:55:41,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-06 04:55:41,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-06 04:55:41,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-06 04:55:41,668 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-06 04:55:41,669 INFO L275 PluginConnector]: CDTParser initialized [2022-12-06 04:55:41,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2022-12-06 04:55:42,774 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-06 04:55:42,956 INFO L351 CDTParser]: Found 1 translation units. [2022-12-06 04:55:42,956 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2022-12-06 04:55:42,990 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ac83a3f9/03c34383ec7f4c8381f807a84a79978d/FLAGfd5b5965e [2022-12-06 04:55:43,003 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ac83a3f9/03c34383ec7f4c8381f807a84a79978d [2022-12-06 04:55:43,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-06 04:55:43,006 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-06 04:55:43,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-06 04:55:43,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-06 04:55:43,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-06 04:55:43,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 04:55:43" (1/1) ... [2022-12-06 04:55:43,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@304b534f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:55:43, skipping insertion in model container [2022-12-06 04:55:43,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 04:55:43" (1/1) ... [2022-12-06 04:55:43,016 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-06 04:55:43,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-06 04:55:43,218 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] [2022-12-06 04:55:43,496 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-06 04:55:43,505 INFO L203 MainTranslator]: Completed pre-run [2022-12-06 04:55:43,515 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] [2022-12-06 04:55:43,554 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-06 04:55:43,662 INFO L208 MainTranslator]: Completed translation [2022-12-06 04:55:43,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:55:43 WrapperNode [2022-12-06 04:55:43,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-06 04:55:43,666 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-06 04:55:43,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-06 04:55:43,667 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-06 04:55:43,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:55:43" (1/1) ... [2022-12-06 04:55:43,697 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:55:43" (1/1) ... [2022-12-06 04:55:43,716 INFO L138 Inliner]: procedures = 364, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2022-12-06 04:55:43,717 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-06 04:55:43,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-06 04:55:43,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-06 04:55:43,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-06 04:55:43,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:55:43" (1/1) ... [2022-12-06 04:55:43,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:55:43" (1/1) ... [2022-12-06 04:55:43,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:55:43" (1/1) ... [2022-12-06 04:55:43,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:55:43" (1/1) ... [2022-12-06 04:55:43,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:55:43" (1/1) ... [2022-12-06 04:55:43,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:55:43" (1/1) ... [2022-12-06 04:55:43,747 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:55:43" (1/1) ... [2022-12-06 04:55:43,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:55:43" (1/1) ... [2022-12-06 04:55:43,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-06 04:55:43,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-06 04:55:43,749 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-06 04:55:43,749 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-06 04:55:43,750 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:55:43" (1/1) ... [2022-12-06 04:55:43,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-06 04:55:43,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 04:55:43,797 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) [2022-12-06 04:55:43,799 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 [2022-12-06 04:55:43,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-06 04:55:43,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-06 04:55:43,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-06 04:55:43,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-06 04:55:43,835 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-06 04:55:43,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-06 04:55:43,835 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2022-12-06 04:55:43,835 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2022-12-06 04:55:43,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-06 04:55:43,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-06 04:55:43,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-06 04:55:43,836 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-06 04:55:43,929 INFO L236 CfgBuilder]: Building ICFG [2022-12-06 04:55:43,930 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-06 04:55:44,051 INFO L277 CfgBuilder]: Performing block encoding [2022-12-06 04:55:44,056 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-06 04:55:44,056 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-06 04:55:44,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 04:55:44 BoogieIcfgContainer [2022-12-06 04:55:44,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-06 04:55:44,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-06 04:55:44,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-06 04:55:44,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-06 04:55:44,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 04:55:43" (1/3) ... [2022-12-06 04:55:44,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@323b2f78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 04:55:44, skipping insertion in model container [2022-12-06 04:55:44,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:55:43" (2/3) ... [2022-12-06 04:55:44,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@323b2f78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 04:55:44, skipping insertion in model container [2022-12-06 04:55:44,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 04:55:44" (3/3) ... [2022-12-06 04:55:44,062 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2022-12-06 04:55:44,074 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-06 04:55:44,075 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-06 04:55:44,075 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-06 04:55:44,102 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-06 04:55:44,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 86 transitions, 180 flow [2022-12-06 04:55:44,180 INFO L130 PetriNetUnfolder]: 7/85 cut-off events. [2022-12-06 04:55:44,181 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 04:55:44,186 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. [2022-12-06 04:55:44,186 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 86 transitions, 180 flow [2022-12-06 04:55:44,189 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 77 transitions, 160 flow [2022-12-06 04:55:44,191 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 04:55:44,206 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 77 transitions, 160 flow [2022-12-06 04:55:44,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 77 transitions, 160 flow [2022-12-06 04:55:44,235 INFO L130 PetriNetUnfolder]: 6/77 cut-off events. [2022-12-06 04:55:44,235 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 04:55:44,235 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. [2022-12-06 04:55:44,237 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 77 transitions, 160 flow [2022-12-06 04:55:44,238 INFO L188 LiptonReduction]: Number of co-enabled transitions 722 [2022-12-06 04:55:45,941 INFO L203 LiptonReduction]: Total number of compositions: 62 [2022-12-06 04:55:45,951 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-06 04:55:45,954 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;@3d1cb4c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-06 04:55:45,955 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-06 04:55:45,957 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-12-06 04:55:45,957 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 04:55:45,957 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 04:55:45,958 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 04:55:45,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 04:55:45,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 04:55:45,961 INFO L85 PathProgramCache]: Analyzing trace with hash 89472530, now seen corresponding path program 1 times [2022-12-06 04:55:45,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 04:55:45,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471905385] [2022-12-06 04:55:45,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 04:55:45,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 04:55:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 04:55:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 04:55:46,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 04:55:46,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471905385] [2022-12-06 04:55:46,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471905385] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 04:55:46,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 04:55:46,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-06 04:55:46,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344842334] [2022-12-06 04:55:46,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 04:55:46,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-06 04:55:46,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 04:55:46,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-06 04:55:46,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-06 04:55:46,133 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-06 04:55:46,134 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) [2022-12-06 04:55:46,134 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 04:55:46,134 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-06 04:55:46,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 04:55:46,171 INFO L130 PetriNetUnfolder]: 41/86 cut-off events. [2022-12-06 04:55:46,171 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 04:55:46,171 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. [2022-12-06 04:55:46,172 INFO L137 encePairwiseOnDemand]: 12/15 looper letters, 20 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2022-12-06 04:55:46,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 23 transitions, 96 flow [2022-12-06 04:55:46,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-06 04:55:46,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-06 04:55:46,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 26 transitions. [2022-12-06 04:55:46,179 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2022-12-06 04:55:46,180 INFO L175 Difference]: Start difference. First operand has 17 places, 15 transitions, 36 flow. Second operand 3 states and 26 transitions. [2022-12-06 04:55:46,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 23 transitions, 96 flow [2022-12-06 04:55:46,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 23 transitions, 92 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-06 04:55:46,183 INFO L231 Difference]: Finished difference. Result has 18 places, 16 transitions, 44 flow [2022-12-06 04:55:46,184 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=18, PETRI_TRANSITIONS=16} [2022-12-06 04:55:46,186 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2022-12-06 04:55:46,186 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 04:55:46,187 INFO L89 Accepts]: Start accepts. Operand has 18 places, 16 transitions, 44 flow [2022-12-06 04:55:46,188 INFO L95 Accepts]: Finished accepts. [2022-12-06 04:55:46,188 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 04:55:46,189 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 18 places, 16 transitions, 44 flow [2022-12-06 04:55:46,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 18 places, 16 transitions, 44 flow [2022-12-06 04:55:46,193 INFO L130 PetriNetUnfolder]: 2/19 cut-off events. [2022-12-06 04:55:46,193 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 04:55:46,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 4 conditions per place. [2022-12-06 04:55:46,193 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 18 places, 16 transitions, 44 flow [2022-12-06 04:55:46,193 INFO L188 LiptonReduction]: Number of co-enabled transitions 70 [2022-12-06 04:55:46,203 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 04:55:46,204 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 18 [2022-12-06 04:55:46,204 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 44 flow [2022-12-06 04:55:46,204 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) [2022-12-06 04:55:46,204 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 04:55:46,204 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 04:55:46,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-06 04:55:46,204 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 04:55:46,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 04:55:46,205 INFO L85 PathProgramCache]: Analyzing trace with hash -683595234, now seen corresponding path program 1 times [2022-12-06 04:55:46,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 04:55:46,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589712976] [2022-12-06 04:55:46,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 04:55:46,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 04:55:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 04:55:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 04:55:46,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 04:55:46,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589712976] [2022-12-06 04:55:46,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589712976] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 04:55:46,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 04:55:46,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-06 04:55:46,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153576981] [2022-12-06 04:55:46,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 04:55:46,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-06 04:55:46,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 04:55:46,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-06 04:55:46,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-06 04:55:46,256 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-06 04:55:46,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 44 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) [2022-12-06 04:55:46,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 04:55:46,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-06 04:55:46,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 04:55:46,299 INFO L130 PetriNetUnfolder]: 61/143 cut-off events. [2022-12-06 04:55:46,300 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-12-06 04:55:46,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 143 events. 61/143 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 496 event pairs, 27 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 92. Up to 85 conditions per place. [2022-12-06 04:55:46,302 INFO L137 encePairwiseOnDemand]: 12/15 looper letters, 22 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2022-12-06 04:55:46,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 120 flow [2022-12-06 04:55:46,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-06 04:55:46,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-06 04:55:46,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 26 transitions. [2022-12-06 04:55:46,303 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2022-12-06 04:55:46,303 INFO L175 Difference]: Start difference. First operand has 18 places, 16 transitions, 44 flow. Second operand 3 states and 26 transitions. [2022-12-06 04:55:46,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 120 flow [2022-12-06 04:55:46,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 25 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-06 04:55:46,304 INFO L231 Difference]: Finished difference. Result has 20 places, 17 transitions, 54 flow [2022-12-06 04:55:46,304 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2022-12-06 04:55:46,305 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 3 predicate places. [2022-12-06 04:55:46,305 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 04:55:46,305 INFO L89 Accepts]: Start accepts. Operand has 20 places, 17 transitions, 54 flow [2022-12-06 04:55:46,307 INFO L95 Accepts]: Finished accepts. [2022-12-06 04:55:46,307 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 04:55:46,307 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 20 places, 17 transitions, 54 flow [2022-12-06 04:55:46,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 20 places, 17 transitions, 54 flow [2022-12-06 04:55:46,312 INFO L130 PetriNetUnfolder]: 2/22 cut-off events. [2022-12-06 04:55:46,312 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-06 04:55:46,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 22 events. 2/22 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 26 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 22. Up to 4 conditions per place. [2022-12-06 04:55:46,314 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 20 places, 17 transitions, 54 flow [2022-12-06 04:55:46,314 INFO L188 LiptonReduction]: Number of co-enabled transitions 84 [2022-12-06 04:55:46,318 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 04:55:46,320 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 15 [2022-12-06 04:55:46,320 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 54 flow [2022-12-06 04:55:46,320 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) [2022-12-06 04:55:46,320 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 04:55:46,320 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 04:55:46,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-06 04:55:46,320 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 04:55:46,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 04:55:46,321 INFO L85 PathProgramCache]: Analyzing trace with hash 468442048, now seen corresponding path program 1 times [2022-12-06 04:55:46,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 04:55:46,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666609285] [2022-12-06 04:55:46,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 04:55:46,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 04:55:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 04:55:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 04:55:46,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 04:55:46,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666609285] [2022-12-06 04:55:46,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666609285] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 04:55:46,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126358720] [2022-12-06 04:55:46,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 04:55:46,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 04:55:46,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 04:55:46,393 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) [2022-12-06 04:55:46,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-06 04:55:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 04:55:46,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-06 04:55:46,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 04:55:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 04:55:46,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 04:55:46,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 04:55:46,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126358720] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 04:55:46,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 04:55:46,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-06 04:55:46,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196699362] [2022-12-06 04:55:46,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 04:55:46,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-06 04:55:46,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 04:55:46,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-06 04:55:46,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-06 04:55:46,547 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-06 04:55:46,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 54 flow. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 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) [2022-12-06 04:55:46,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 04:55:46,547 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-06 04:55:46,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 04:55:46,623 INFO L130 PetriNetUnfolder]: 111/264 cut-off events. [2022-12-06 04:55:46,623 INFO L131 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2022-12-06 04:55:46,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 264 events. 111/264 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 930 event pairs, 18 based on Foata normal form. 30/294 useless extension candidates. Maximal degree in co-relation 198. Up to 55 conditions per place. [2022-12-06 04:55:46,624 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 44 selfloop transitions, 6 changer transitions 0/51 dead transitions. [2022-12-06 04:55:46,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 51 transitions, 258 flow [2022-12-06 04:55:46,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-06 04:55:46,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-06 04:55:46,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 54 transitions. [2022-12-06 04:55:46,626 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6 [2022-12-06 04:55:46,626 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 54 flow. Second operand 6 states and 54 transitions. [2022-12-06 04:55:46,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 51 transitions, 258 flow [2022-12-06 04:55:46,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 51 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-06 04:55:46,627 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 92 flow [2022-12-06 04:55:46,627 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=92, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2022-12-06 04:55:46,628 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 11 predicate places. [2022-12-06 04:55:46,628 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 04:55:46,628 INFO L89 Accepts]: Start accepts. Operand has 28 places, 20 transitions, 92 flow [2022-12-06 04:55:46,629 INFO L95 Accepts]: Finished accepts. [2022-12-06 04:55:46,629 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 04:55:46,629 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 20 transitions, 92 flow [2022-12-06 04:55:46,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 20 transitions, 92 flow [2022-12-06 04:55:46,632 INFO L130 PetriNetUnfolder]: 2/29 cut-off events. [2022-12-06 04:55:46,632 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-12-06 04:55:46,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 29 events. 2/29 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 0 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 42. Up to 6 conditions per place. [2022-12-06 04:55:46,633 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 28 places, 20 transitions, 92 flow [2022-12-06 04:55:46,633 INFO L188 LiptonReduction]: Number of co-enabled transitions 126 [2022-12-06 04:55:46,649 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 04:55:46,650 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 22 [2022-12-06 04:55:46,650 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 92 flow [2022-12-06 04:55:46,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 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) [2022-12-06 04:55:46,650 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 04:55:46,651 INFO L213 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 04:55:46,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-06 04:55:46,855 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 [2022-12-06 04:55:46,856 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 04:55:46,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 04:55:46,857 INFO L85 PathProgramCache]: Analyzing trace with hash 2064556268, now seen corresponding path program 2 times [2022-12-06 04:55:46,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 04:55:46,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291521465] [2022-12-06 04:55:46,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 04:55:46,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 04:55:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 04:55:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-06 04:55:46,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 04:55:46,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291521465] [2022-12-06 04:55:46,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291521465] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 04:55:46,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376102886] [2022-12-06 04:55:46,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-06 04:55:46,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 04:55:46,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 04:55:46,961 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) [2022-12-06 04:55:46,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-06 04:55:47,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-06 04:55:47,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 04:55:47,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-06 04:55:47,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 04:55:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-06 04:55:47,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 04:55:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-06 04:55:47,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376102886] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 04:55:47,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 04:55:47,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-12-06 04:55:47,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730772002] [2022-12-06 04:55:47,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 04:55:47,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-06 04:55:47,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 04:55:47,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-06 04:55:47,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-12-06 04:55:47,192 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-06 04:55:47,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 92 flow. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 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) [2022-12-06 04:55:47,192 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 04:55:47,192 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-06 04:55:47,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 04:55:47,568 INFO L130 PetriNetUnfolder]: 323/748 cut-off events. [2022-12-06 04:55:47,569 INFO L131 PetriNetUnfolder]: For 1511/1511 co-relation queries the response was YES. [2022-12-06 04:55:47,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2276 conditions, 748 events. 323/748 cut-off events. For 1511/1511 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3109 event pairs, 10 based on Foata normal form. 107/855 useless extension candidates. Maximal degree in co-relation 588. Up to 168 conditions per place. [2022-12-06 04:55:47,573 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 158 selfloop transitions, 69 changer transitions 0/228 dead transitions. [2022-12-06 04:55:47,573 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 228 transitions, 1346 flow [2022-12-06 04:55:47,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-06 04:55:47,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-06 04:55:47,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 290 transitions. [2022-12-06 04:55:47,576 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2022-12-06 04:55:47,576 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 92 flow. Second operand 34 states and 290 transitions. [2022-12-06 04:55:47,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 228 transitions, 1346 flow [2022-12-06 04:55:47,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 228 transitions, 1286 flow, removed 27 selfloop flow, removed 1 redundant places. [2022-12-06 04:55:47,583 INFO L231 Difference]: Finished difference. Result has 85 places, 82 transitions, 724 flow [2022-12-06 04:55:47,583 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=724, PETRI_PLACES=85, PETRI_TRANSITIONS=82} [2022-12-06 04:55:47,583 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 68 predicate places. [2022-12-06 04:55:47,583 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 04:55:47,584 INFO L89 Accepts]: Start accepts. Operand has 85 places, 82 transitions, 724 flow [2022-12-06 04:55:47,587 INFO L95 Accepts]: Finished accepts. [2022-12-06 04:55:47,587 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 04:55:47,587 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 82 transitions, 724 flow [2022-12-06 04:55:47,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 82 transitions, 724 flow [2022-12-06 04:55:47,609 INFO L130 PetriNetUnfolder]: 63/249 cut-off events. [2022-12-06 04:55:47,610 INFO L131 PetriNetUnfolder]: For 3041/3047 co-relation queries the response was YES. [2022-12-06 04:55:47,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1206 conditions, 249 events. 63/249 cut-off events. For 3041/3047 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 863 event pairs, 7 based on Foata normal form. 4/247 useless extension candidates. Maximal degree in co-relation 997. Up to 61 conditions per place. [2022-12-06 04:55:47,613 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 82 transitions, 724 flow [2022-12-06 04:55:47,613 INFO L188 LiptonReduction]: Number of co-enabled transitions 422 [2022-12-06 04:55:47,619 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 04:55:47,620 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 37 [2022-12-06 04:55:47,620 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 724 flow [2022-12-06 04:55:47,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 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) [2022-12-06 04:55:47,620 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 04:55:47,620 INFO L213 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 04:55:47,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-06 04:55:47,826 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 [2022-12-06 04:55:47,826 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 04:55:47,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 04:55:47,826 INFO L85 PathProgramCache]: Analyzing trace with hash 614689770, now seen corresponding path program 3 times [2022-12-06 04:55:47,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 04:55:47,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569815240] [2022-12-06 04:55:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 04:55:47,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 04:55:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 04:55:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-06 04:55:47,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 04:55:47,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569815240] [2022-12-06 04:55:47,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569815240] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 04:55:47,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236509460] [2022-12-06 04:55:47,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-06 04:55:47,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 04:55:47,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 04:55:47,930 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) [2022-12-06 04:55:47,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-06 04:55:48,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-06 04:55:48,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 04:55:48,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-06 04:55:48,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 04:55:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-06 04:55:48,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 04:55:48,126 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-06 04:55:48,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236509460] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 04:55:48,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 04:55:48,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-06 04:55:48,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238660425] [2022-12-06 04:55:48,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 04:55:48,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-06 04:55:48,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 04:55:48,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-06 04:55:48,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-12-06 04:55:48,128 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-06 04:55:48,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 82 transitions, 724 flow. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 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) [2022-12-06 04:55:48,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 04:55:48,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-06 04:55:48,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 04:55:48,308 INFO L130 PetriNetUnfolder]: 622/1302 cut-off events. [2022-12-06 04:55:48,309 INFO L131 PetriNetUnfolder]: For 19882/19882 co-relation queries the response was YES. [2022-12-06 04:55:48,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6869 conditions, 1302 events. 622/1302 cut-off events. For 19882/19882 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6262 event pairs, 84 based on Foata normal form. 92/1394 useless extension candidates. Maximal degree in co-relation 5483. Up to 324 conditions per place. [2022-12-06 04:55:48,318 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 128 selfloop transitions, 38 changer transitions 0/167 dead transitions. [2022-12-06 04:55:48,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 167 transitions, 1986 flow [2022-12-06 04:55:48,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-06 04:55:48,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-06 04:55:48,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 71 transitions. [2022-12-06 04:55:48,320 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2022-12-06 04:55:48,320 INFO L175 Difference]: Start difference. First operand has 85 places, 82 transitions, 724 flow. Second operand 8 states and 71 transitions. [2022-12-06 04:55:48,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 167 transitions, 1986 flow [2022-12-06 04:55:48,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 167 transitions, 1900 flow, removed 11 selfloop flow, removed 4 redundant places. [2022-12-06 04:55:48,343 INFO L231 Difference]: Finished difference. Result has 93 places, 86 transitions, 860 flow [2022-12-06 04:55:48,343 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=860, PETRI_PLACES=93, PETRI_TRANSITIONS=86} [2022-12-06 04:55:48,344 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 76 predicate places. [2022-12-06 04:55:48,344 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 04:55:48,344 INFO L89 Accepts]: Start accepts. Operand has 93 places, 86 transitions, 860 flow [2022-12-06 04:55:48,347 INFO L95 Accepts]: Finished accepts. [2022-12-06 04:55:48,347 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 04:55:48,348 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 86 transitions, 860 flow [2022-12-06 04:55:48,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 86 transitions, 860 flow [2022-12-06 04:55:48,384 INFO L130 PetriNetUnfolder]: 81/353 cut-off events. [2022-12-06 04:55:48,384 INFO L131 PetriNetUnfolder]: For 7209/7309 co-relation queries the response was YES. [2022-12-06 04:55:48,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1727 conditions, 353 events. 81/353 cut-off events. For 7209/7309 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1475 event pairs, 36 based on Foata normal form. 39/389 useless extension candidates. Maximal degree in co-relation 1390. Up to 93 conditions per place. [2022-12-06 04:55:48,388 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 86 transitions, 860 flow [2022-12-06 04:55:48,388 INFO L188 LiptonReduction]: Number of co-enabled transitions 538 [2022-12-06 04:55:48,398 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 04:55:48,399 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 55 [2022-12-06 04:55:48,399 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 86 transitions, 860 flow [2022-12-06 04:55:48,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 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) [2022-12-06 04:55:48,399 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 04:55:48,399 INFO L213 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 04:55:48,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-06 04:55:48,635 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 [2022-12-06 04:55:48,636 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 04:55:48,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 04:55:48,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1406674066, now seen corresponding path program 4 times [2022-12-06 04:55:48,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 04:55:48,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749973759] [2022-12-06 04:55:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 04:55:48,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 04:55:48,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 04:55:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-06 04:55:48,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 04:55:48,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749973759] [2022-12-06 04:55:48,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749973759] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 04:55:48,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690708513] [2022-12-06 04:55:48,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-06 04:55:48,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 04:55:48,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 04:55:48,783 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) [2022-12-06 04:55:48,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-06 04:55:48,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-06 04:55:48,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 04:55:48,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-06 04:55:48,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 04:55:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-06 04:55:48,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 04:55:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 10 proven. 66 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-12-06 04:55:49,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690708513] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 04:55:49,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 04:55:49,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-12-06 04:55:49,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256414625] [2022-12-06 04:55:49,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 04:55:49,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-06 04:55:49,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 04:55:49,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-06 04:55:49,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-12-06 04:55:49,103 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-06 04:55:49,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 86 transitions, 860 flow. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 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) [2022-12-06 04:55:49,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 04:55:49,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-06 04:55:49,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 04:55:49,531 INFO L130 PetriNetUnfolder]: 1358/2774 cut-off events. [2022-12-06 04:55:49,531 INFO L131 PetriNetUnfolder]: For 52612/52612 co-relation queries the response was YES. [2022-12-06 04:55:49,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16291 conditions, 2774 events. 1358/2774 cut-off events. For 52612/52612 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 14460 event pairs, 84 based on Foata normal form. 184/2958 useless extension candidates. Maximal degree in co-relation 13086. Up to 708 conditions per place. [2022-12-06 04:55:49,554 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 272 selfloop transitions, 46 changer transitions 0/319 dead transitions. [2022-12-06 04:55:49,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 319 transitions, 3996 flow [2022-12-06 04:55:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-06 04:55:49,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-06 04:55:49,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 147 transitions. [2022-12-06 04:55:49,556 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6125 [2022-12-06 04:55:49,556 INFO L175 Difference]: Start difference. First operand has 93 places, 86 transitions, 860 flow. Second operand 16 states and 147 transitions. [2022-12-06 04:55:49,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 319 transitions, 3996 flow [2022-12-06 04:55:49,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 319 transitions, 3832 flow, removed 60 selfloop flow, removed 2 redundant places. [2022-12-06 04:55:49,590 INFO L231 Difference]: Finished difference. Result has 115 places, 95 transitions, 1082 flow [2022-12-06 04:55:49,590 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1082, PETRI_PLACES=115, PETRI_TRANSITIONS=95} [2022-12-06 04:55:49,591 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 98 predicate places. [2022-12-06 04:55:49,591 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 04:55:49,591 INFO L89 Accepts]: Start accepts. Operand has 115 places, 95 transitions, 1082 flow [2022-12-06 04:55:49,595 INFO L95 Accepts]: Finished accepts. [2022-12-06 04:55:49,596 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 04:55:49,596 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 95 transitions, 1082 flow [2022-12-06 04:55:49,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 95 transitions, 1082 flow [2022-12-06 04:55:49,673 INFO L130 PetriNetUnfolder]: 137/665 cut-off events. [2022-12-06 04:55:49,674 INFO L131 PetriNetUnfolder]: For 16236/16552 co-relation queries the response was YES. [2022-12-06 04:55:49,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3337 conditions, 665 events. 137/665 cut-off events. For 16236/16552 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3357 event pairs, 92 based on Foata normal form. 95/757 useless extension candidates. Maximal degree in co-relation 3009. Up to 205 conditions per place. [2022-12-06 04:55:49,681 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 95 transitions, 1082 flow [2022-12-06 04:55:49,681 INFO L188 LiptonReduction]: Number of co-enabled transitions 794 [2022-12-06 04:55:49,690 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 04:55:49,691 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 100 [2022-12-06 04:55:49,691 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 95 transitions, 1082 flow [2022-12-06 04:55:49,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 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) [2022-12-06 04:55:49,691 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 04:55:49,691 INFO L213 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 04:55:49,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-06 04:55:49,896 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 [2022-12-06 04:55:49,897 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 04:55:49,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 04:55:49,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1510009216, now seen corresponding path program 5 times [2022-12-06 04:55:49,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 04:55:49,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654797827] [2022-12-06 04:55:49,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 04:55:49,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 04:55:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 04:55:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-12-06 04:55:50,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 04:55:50,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654797827] [2022-12-06 04:55:50,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654797827] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 04:55:50,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191446362] [2022-12-06 04:55:50,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-06 04:55:50,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 04:55:50,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 04:55:50,244 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) [2022-12-06 04:55:50,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-06 04:55:50,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-12-06 04:55:50,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 04:55:50,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-06 04:55:50,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 04:55:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 14 proven. 145 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-12-06 04:55:50,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 04:55:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 14 proven. 145 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-12-06 04:55:50,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191446362] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 04:55:50,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 04:55:50,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 37 [2022-12-06 04:55:50,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097835592] [2022-12-06 04:55:50,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 04:55:50,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-06 04:55:50,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 04:55:50,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-06 04:55:50,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=966, Unknown=0, NotChecked=0, Total=1332 [2022-12-06 04:55:50,729 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-06 04:55:50,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 95 transitions, 1082 flow. Second operand has 37 states, 37 states have (on average 4.081081081081081) internal successors, (151), 37 states have internal predecessors, (151), 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) [2022-12-06 04:55:50,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 04:55:50,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-06 04:55:50,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 04:56:02,163 INFO L130 PetriNetUnfolder]: 2839/5880 cut-off events. [2022-12-06 04:56:02,164 INFO L131 PetriNetUnfolder]: For 235464/235464 co-relation queries the response was YES. [2022-12-06 04:56:02,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32965 conditions, 5880 events. 2839/5880 cut-off events. For 235464/235464 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 35028 event pairs, 10 based on Foata normal form. 703/6583 useless extension candidates. Maximal degree in co-relation 30511. Up to 1452 conditions per place. [2022-12-06 04:56:02,225 INFO L137 encePairwiseOnDemand]: 8/15 looper letters, 1390 selfloop transitions, 718 changer transitions 0/2109 dead transitions. [2022-12-06 04:56:02,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 2109 transitions, 23792 flow [2022-12-06 04:56:02,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 337 states. [2022-12-06 04:56:02,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2022-12-06 04:56:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 2596 transitions. [2022-12-06 04:56:02,240 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.5135509396636994 [2022-12-06 04:56:02,240 INFO L175 Difference]: Start difference. First operand has 115 places, 95 transitions, 1082 flow. Second operand 337 states and 2596 transitions. [2022-12-06 04:56:02,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 2109 transitions, 23792 flow [2022-12-06 04:56:02,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 2109 transitions, 23532 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-12-06 04:56:02,420 INFO L231 Difference]: Finished difference. Result has 632 places, 756 transitions, 13786 flow [2022-12-06 04:56:02,420 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=337, PETRI_FLOW=13786, PETRI_PLACES=632, PETRI_TRANSITIONS=756} [2022-12-06 04:56:02,421 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 615 predicate places. [2022-12-06 04:56:02,421 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 04:56:02,421 INFO L89 Accepts]: Start accepts. Operand has 632 places, 756 transitions, 13786 flow [2022-12-06 04:56:02,501 INFO L95 Accepts]: Finished accepts. [2022-12-06 04:56:02,502 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 04:56:02,502 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 632 places, 756 transitions, 13786 flow [2022-12-06 04:56:02,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 632 places, 756 transitions, 13786 flow [2022-12-06 04:56:03,187 INFO L130 PetriNetUnfolder]: 543/1991 cut-off events. [2022-12-06 04:56:03,188 INFO L131 PetriNetUnfolder]: For 338549/338900 co-relation queries the response was YES. [2022-12-06 04:56:03,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16401 conditions, 1991 events. 543/1991 cut-off events. For 338549/338900 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 12966 event pairs, 33 based on Foata normal form. 125/2088 useless extension candidates. Maximal degree in co-relation 14183. Up to 577 conditions per place. [2022-12-06 04:56:03,252 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 632 places, 756 transitions, 13786 flow [2022-12-06 04:56:03,253 INFO L188 LiptonReduction]: Number of co-enabled transitions 3360 [2022-12-06 04:56:03,400 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 04:56:03,400 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 979 [2022-12-06 04:56:03,401 INFO L495 AbstractCegarLoop]: Abstraction has has 632 places, 756 transitions, 13786 flow [2022-12-06 04:56:03,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.081081081081081) internal successors, (151), 37 states have internal predecessors, (151), 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) [2022-12-06 04:56:03,401 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 04:56:03,401 INFO L213 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 04:56:03,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-06 04:56:03,609 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 [2022-12-06 04:56:03,609 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 04:56:03,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 04:56:03,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1950423628, now seen corresponding path program 6 times [2022-12-06 04:56:03,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 04:56:03,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032794483] [2022-12-06 04:56:03,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 04:56:03,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 04:56:03,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 04:56:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 20 proven. 435 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2022-12-06 04:56:04,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 04:56:04,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032794483] [2022-12-06 04:56:04,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032794483] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 04:56:04,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013840697] [2022-12-06 04:56:04,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-06 04:56:04,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 04:56:04,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 04:56:04,024 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) [2022-12-06 04:56:04,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-06 04:56:04,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-12-06 04:56:04,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-06 04:56:04,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-06 04:56:04,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 04:56:04,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 20 proven. 435 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2022-12-06 04:56:04,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 04:56:04,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 20 proven. 435 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2022-12-06 04:56:04,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013840697] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 04:56:04,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 04:56:04,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 23 [2022-12-06 04:56:04,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992286363] [2022-12-06 04:56:04,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 04:56:04,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-06 04:56:04,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 04:56:04,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-06 04:56:04,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-12-06 04:56:04,774 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 15 [2022-12-06 04:56:04,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 756 transitions, 13786 flow. Second operand has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 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) [2022-12-06 04:56:04,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 04:56:04,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 15 [2022-12-06 04:56:04,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 04:56:07,966 INFO L130 PetriNetUnfolder]: 3570/7246 cut-off events. [2022-12-06 04:56:07,966 INFO L131 PetriNetUnfolder]: For 1751500/1751502 co-relation queries the response was YES. [2022-12-06 04:56:08,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70441 conditions, 7246 events. 3570/7246 cut-off events. For 1751500/1751502 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 44155 event pairs, 149 based on Foata normal form. 217/7463 useless extension candidates. Maximal degree in co-relation 67048. Up to 1826 conditions per place. [2022-12-06 04:56:08,112 INFO L137 encePairwiseOnDemand]: 11/15 looper letters, 611 selfloop transitions, 472 changer transitions 0/1084 dead transitions. [2022-12-06 04:56:08,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 653 places, 1084 transitions, 28042 flow [2022-12-06 04:56:08,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-06 04:56:08,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-06 04:56:08,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 198 transitions. [2022-12-06 04:56:08,113 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.6 [2022-12-06 04:56:08,114 INFO L175 Difference]: Start difference. First operand has 632 places, 756 transitions, 13786 flow. Second operand 22 states and 198 transitions. [2022-12-06 04:56:08,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 653 places, 1084 transitions, 28042 flow [2022-12-06 04:56:14,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 1084 transitions, 23628 flow, removed 1755 selfloop flow, removed 38 redundant places. [2022-12-06 04:56:14,720 INFO L231 Difference]: Finished difference. Result has 621 places, 841 transitions, 12876 flow [2022-12-06 04:56:14,721 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=15, PETRI_DIFFERENCE_MINUEND_FLOW=9462, PETRI_DIFFERENCE_MINUEND_PLACES=594, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=387, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=12876, PETRI_PLACES=621, PETRI_TRANSITIONS=841} [2022-12-06 04:56:14,721 INFO L294 CegarLoopForPetriNet]: 17 programPoint places, 604 predicate places. [2022-12-06 04:56:14,721 WARN L163 eatedLiptonReduction]: Counterexample is not a run of mAbstraction. Replaying acceptance of the word... [2022-12-06 04:56:14,721 INFO L89 Accepts]: Start accepts. Operand has 621 places, 841 transitions, 12876 flow [2022-12-06 04:56:14,810 INFO L95 Accepts]: Finished accepts. [2022-12-06 04:56:14,810 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-06 04:56:14,811 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 621 places, 841 transitions, 12876 flow [2022-12-06 04:56:14,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 621 places, 841 transitions, 12876 flow [2022-12-06 04:56:15,563 INFO L130 PetriNetUnfolder]: 650/2657 cut-off events. [2022-12-06 04:56:15,563 INFO L131 PetriNetUnfolder]: For 373577/373834 co-relation queries the response was YES. [2022-12-06 04:56:15,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18116 conditions, 2657 events. 650/2657 cut-off events. For 373577/373834 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 18319 event pairs, 113 based on Foata normal form. 4/2549 useless extension candidates. Maximal degree in co-relation 16467. Up to 630 conditions per place. [2022-12-06 04:56:15,631 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 621 places, 841 transitions, 12876 flow [2022-12-06 04:56:15,631 INFO L188 LiptonReduction]: Number of co-enabled transitions 3686 [2022-12-06 04:56:15,670 INFO L203 LiptonReduction]: Total number of compositions: 0 [2022-12-06 04:56:15,671 INFO L143 eatedLiptonReduction]: Time needed for LBE in milliseconds: 950 [2022-12-06 04:56:15,671 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 841 transitions, 12876 flow [2022-12-06 04:56:15,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.173913043478261) internal successors, (119), 23 states have internal predecessors, (119), 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) [2022-12-06 04:56:15,671 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 04:56:15,671 INFO L213 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 04:56:15,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-06 04:56:15,878 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 [2022-12-06 04:56:15,880 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-06 04:56:15,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 04:56:15,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1511874564, now seen corresponding path program 7 times [2022-12-06 04:56:15,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 04:56:15,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137115525] [2022-12-06 04:56:15,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 04:56:15,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 04:56:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 04:56:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 04:56:18,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 04:56:18,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137115525] [2022-12-06 04:56:18,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137115525] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-06 04:56:18,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421675420] [2022-12-06 04:56:18,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-06 04:56:18,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-06 04:56:18,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 04:56:18,343 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) [2022-12-06 04:56:18,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-06 04:56:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 04:56:18,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 128 conjunts are in the unsatisfiable core [2022-12-06 04:56:18,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-06 04:56:18,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 04:56:18,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-06 04:56:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 04:56:19,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421675420] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-06 04:56:19,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-06 04:56:19,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2022-12-06 04:56:19,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898273379] [2022-12-06 04:56:19,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-06 04:56:19,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-06 04:56:19,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 04:56:19,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-06 04:56:19,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2022-12-06 04:56:19,246 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 15 [2022-12-06 04:56:19,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 841 transitions, 12876 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) [2022-12-06 04:56:19,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 04:56:19,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 15 [2022-12-06 04:56:19,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 04:57:47,962 INFO L130 PetriNetUnfolder]: 34486/68977 cut-off events. [2022-12-06 04:57:47,963 INFO L131 PetriNetUnfolder]: For 118883878/118883878 co-relation queries the response was YES. [2022-12-06 04:57:53,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1684920 conditions, 68977 events. 34486/68977 cut-off events. For 118883878/118883878 co-relation queries the response was YES. Maximal size of possible extension queue 993. Compared 613780 event pairs, 2167 based on Foata normal form. 1/68978 useless extension candidates. Maximal degree in co-relation 1679185. Up to 16121 conditions per place. [2022-12-06 04:57:53,731 INFO L137 encePairwiseOnDemand]: 10/15 looper letters, 9624 selfloop transitions, 793 changer transitions 1/10418 dead transitions. [2022-12-06 04:57:53,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 913 places, 10418 transitions, 261958 flow [2022-12-06 04:57:53,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 293 states. [2022-12-06 04:57:53,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2022-12-06 04:57:53,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 2269 transitions. [2022-12-06 04:57:53,752 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.516268486916951 [2022-12-06 04:57:53,752 INFO L175 Difference]: Start difference. First operand has 621 places, 841 transitions, 12876 flow. Second operand 293 states and 2269 transitions. [2022-12-06 04:57:53,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 913 places, 10418 transitions, 261958 flow Received shutdown request... [2022-12-06 05:08:11,527 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-06 05:08:11,530 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-06 05:08:12,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-06 05:08:12,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown