/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 09:29:23,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 09:29:23,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 09:29:23,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 09:29:23,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 09:29:23,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 09:29:23,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 09:29:23,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 09:29:23,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 09:29:23,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 09:29:23,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 09:29:23,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 09:29:23,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 09:29:23,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 09:29:23,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 09:29:23,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 09:29:23,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 09:29:23,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 09:29:23,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 09:29:23,302 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 09:29:23,303 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 09:29:23,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 09:29:23,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 09:29:23,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 09:29:23,311 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 09:29:23,311 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 09:29:23,311 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 09:29:23,312 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 09:29:23,312 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 09:29:23,313 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 09:29:23,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 09:29:23,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 09:29:23,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 09:29:23,315 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 09:29:23,315 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 09:29:23,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 09:29:23,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 09:29:23,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 09:29:23,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 09:29:23,316 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 09:29:23,317 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 09:29:23,317 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-VariableLbe.epf [2023-01-28 09:29:23,336 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 09:29:23,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 09:29:23,337 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 09:29:23,338 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 09:29:23,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 09:29:23,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 09:29:23,338 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 09:29:23,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 09:29:23,339 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 09:29:23,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 09:29:23,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 09:29:23,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 09:29:23,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 09:29:23,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 09:29:23,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 09:29:23,340 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 09:29:23,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 09:29:23,340 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 09:29:23,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 09:29:23,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 09:29:23,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 09:29:23,340 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 09:29:23,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 09:29:23,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 09:29:23,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 09:29:23,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 09:29:23,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 09:29:23,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 09:29:23,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 09:29:23,341 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 09:29:23,341 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 09:29:23,341 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 09:29:23,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 09:29:23,495 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 09:29:23,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 09:29:23,497 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 09:29:23,498 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 09:29:23,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c [2023-01-28 09:29:24,451 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 09:29:24,577 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 09:29:24,577 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c [2023-01-28 09:29:24,581 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/914b63939/fc24b5986c8a47bab440ad79bcec6f6e/FLAG5e25d8cc5 [2023-01-28 09:29:24,590 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/914b63939/fc24b5986c8a47bab440ad79bcec6f6e [2023-01-28 09:29:24,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 09:29:24,593 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 09:29:24,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 09:29:24,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 09:29:24,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 09:29:24,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 09:29:24" (1/1) ... [2023-01-28 09:29:24,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ab7e0ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:29:24, skipping insertion in model container [2023-01-28 09:29:24,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 09:29:24" (1/1) ... [2023-01-28 09:29:24,601 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 09:29:24,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 09:29:24,733 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c[2135,2148] [2023-01-28 09:29:24,740 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 09:29:24,747 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 09:29:24,766 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c[2135,2148] [2023-01-28 09:29:24,771 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 09:29:24,780 INFO L208 MainTranslator]: Completed translation [2023-01-28 09:29:24,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:29:24 WrapperNode [2023-01-28 09:29:24,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 09:29:24,781 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 09:29:24,781 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 09:29:24,781 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 09:29:24,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:29:24" (1/1) ... [2023-01-28 09:29:24,795 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:29:24" (1/1) ... [2023-01-28 09:29:24,808 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 73 [2023-01-28 09:29:24,808 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 09:29:24,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 09:29:24,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 09:29:24,809 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 09:29:24,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:29:24" (1/1) ... [2023-01-28 09:29:24,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:29:24" (1/1) ... [2023-01-28 09:29:24,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:29:24" (1/1) ... [2023-01-28 09:29:24,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:29:24" (1/1) ... [2023-01-28 09:29:24,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:29:24" (1/1) ... [2023-01-28 09:29:24,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:29:24" (1/1) ... [2023-01-28 09:29:24,830 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:29:24" (1/1) ... [2023-01-28 09:29:24,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:29:24" (1/1) ... [2023-01-28 09:29:24,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 09:29:24,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 09:29:24,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 09:29:24,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 09:29:24,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:29:24" (1/1) ... [2023-01-28 09:29:24,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 09:29:24,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:24,853 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) [2023-01-28 09:29:24,855 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 [2023-01-28 09:29:24,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 09:29:24,890 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 09:29:24,890 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 09:29:24,890 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 09:29:24,890 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 09:29:24,891 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-28 09:29:24,891 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-28 09:29:24,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 09:29:24,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 09:29:24,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 09:29:24,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 09:29:24,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 09:29:24,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 09:29:24,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 09:29:24,896 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 09:29:24,987 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 09:29:24,989 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 09:29:25,197 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 09:29:25,202 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 09:29:25,202 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-28 09:29:25,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 09:29:25 BoogieIcfgContainer [2023-01-28 09:29:25,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 09:29:25,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 09:29:25,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 09:29:25,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 09:29:25,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 09:29:24" (1/3) ... [2023-01-28 09:29:25,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eab5603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 09:29:25, skipping insertion in model container [2023-01-28 09:29:25,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:29:24" (2/3) ... [2023-01-28 09:29:25,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eab5603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 09:29:25, skipping insertion in model container [2023-01-28 09:29:25,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 09:29:25" (3/3) ... [2023-01-28 09:29:25,208 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.c [2023-01-28 09:29:25,219 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 09:29:25,219 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 09:29:25,219 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 09:29:25,290 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 09:29:25,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 105 transitions, 234 flow [2023-01-28 09:29:25,360 INFO L130 PetriNetUnfolder]: 7/102 cut-off events. [2023-01-28 09:29:25,360 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 09:29:25,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 102 events. 7/102 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 69 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2023-01-28 09:29:25,364 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 105 transitions, 234 flow [2023-01-28 09:29:25,366 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 92 transitions, 202 flow [2023-01-28 09:29:25,368 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 09:29:25,374 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 92 transitions, 202 flow [2023-01-28 09:29:25,375 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 92 transitions, 202 flow [2023-01-28 09:29:25,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 92 transitions, 202 flow [2023-01-28 09:29:25,392 INFO L130 PetriNetUnfolder]: 7/92 cut-off events. [2023-01-28 09:29:25,392 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 09:29:25,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 92 events. 7/92 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2023-01-28 09:29:25,414 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2023-01-28 09:29:27,345 INFO L134 LiptonReduction]: Checked pairs total: 1312 [2023-01-28 09:29:27,346 INFO L136 LiptonReduction]: Total number of compositions: 76 [2023-01-28 09:29:27,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 09:29:27,358 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@305b4573, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 09:29:27,358 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 09:29:27,362 INFO L130 PetriNetUnfolder]: 3/21 cut-off events. [2023-01-28 09:29:27,362 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 09:29:27,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:27,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:27,363 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:29:27,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:27,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1620298547, now seen corresponding path program 1 times [2023-01-28 09:29:27,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:27,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664938517] [2023-01-28 09:29:27,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:27,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:27,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:27,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664938517] [2023-01-28 09:29:27,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664938517] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:29:27,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:29:27,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 09:29:27,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264274310] [2023-01-28 09:29:27,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:29:27,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 09:29:27,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:27,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 09:29:27,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 09:29:27,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 181 [2023-01-28 09:29:27,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 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) [2023-01-28 09:29:27,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:27,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 181 [2023-01-28 09:29:27,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:27,983 INFO L130 PetriNetUnfolder]: 359/506 cut-off events. [2023-01-28 09:29:27,983 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2023-01-28 09:29:27,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 506 events. 359/506 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1602 event pairs, 39 based on Foata normal form. 1/311 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2023-01-28 09:29:27,989 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 30 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2023-01-28 09:29:27,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 38 transitions, 179 flow [2023-01-28 09:29:27,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 09:29:27,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 09:29:28,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 297 transitions. [2023-01-28 09:29:28,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5469613259668509 [2023-01-28 09:29:28,003 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 297 transitions. [2023-01-28 09:29:28,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 297 transitions. [2023-01-28 09:29:28,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:28,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 297 transitions. [2023-01-28 09:29:28,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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) [2023-01-28 09:29:28,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 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) [2023-01-28 09:29:28,015 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 181.0) internal successors, (724), 4 states have internal predecessors, (724), 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) [2023-01-28 09:29:28,016 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 62 flow. Second operand 3 states and 297 transitions. [2023-01-28 09:29:28,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 38 transitions, 179 flow [2023-01-28 09:29:28,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 38 transitions, 157 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-28 09:29:28,021 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 76 flow [2023-01-28 09:29:28,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2023-01-28 09:29:28,026 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2023-01-28 09:29:28,026 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 76 flow [2023-01-28 09:29:28,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 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) [2023-01-28 09:29:28,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:28,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:28,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 09:29:28,027 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:29:28,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:28,029 INFO L85 PathProgramCache]: Analyzing trace with hash -622319524, now seen corresponding path program 1 times [2023-01-28 09:29:28,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:28,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796989272] [2023-01-28 09:29:28,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:28,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:28,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:28,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796989272] [2023-01-28 09:29:28,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796989272] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:29:28,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:29:28,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 09:29:28,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347960474] [2023-01-28 09:29:28,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:29:28,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 09:29:28,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:28,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 09:29:28,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 09:29:28,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-01-28 09:29:28,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 76 flow. Second operand has 5 states, 5 states have (on average 83.8) internal successors, (419), 5 states have internal predecessors, (419), 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) [2023-01-28 09:29:28,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:28,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-01-28 09:29:28,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:28,322 INFO L130 PetriNetUnfolder]: 486/764 cut-off events. [2023-01-28 09:29:28,322 INFO L131 PetriNetUnfolder]: For 190/190 co-relation queries the response was YES. [2023-01-28 09:29:28,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1805 conditions, 764 events. 486/764 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3182 event pairs, 137 based on Foata normal form. 68/826 useless extension candidates. Maximal degree in co-relation 420. Up to 391 conditions per place. [2023-01-28 09:29:28,326 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 54 selfloop transitions, 5 changer transitions 2/62 dead transitions. [2023-01-28 09:29:28,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 62 transitions, 298 flow [2023-01-28 09:29:28,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 09:29:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 09:29:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 460 transitions. [2023-01-28 09:29:28,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082872928176796 [2023-01-28 09:29:28,329 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 460 transitions. [2023-01-28 09:29:28,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 460 transitions. [2023-01-28 09:29:28,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:28,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 460 transitions. [2023-01-28 09:29:28,330 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 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) [2023-01-28 09:29:28,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 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) [2023-01-28 09:29:28,333 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 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) [2023-01-28 09:29:28,333 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 76 flow. Second operand 5 states and 460 transitions. [2023-01-28 09:29:28,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 62 transitions, 298 flow [2023-01-28 09:29:28,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 62 transitions, 292 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 09:29:28,335 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 119 flow [2023-01-28 09:29:28,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-01-28 09:29:28,336 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-01-28 09:29:28,336 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 119 flow [2023-01-28 09:29:28,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.8) internal successors, (419), 5 states have internal predecessors, (419), 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) [2023-01-28 09:29:28,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:28,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:28,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 09:29:28,337 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:29:28,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:28,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1535831546, now seen corresponding path program 2 times [2023-01-28 09:29:28,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:28,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627404984] [2023-01-28 09:29:28,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:28,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:28,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:28,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627404984] [2023-01-28 09:29:28,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627404984] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:29:28,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:29:28,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 09:29:28,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699056642] [2023-01-28 09:29:28,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:29:28,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 09:29:28,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:28,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 09:29:28,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 09:29:28,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-01-28 09:29:28,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 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) [2023-01-28 09:29:28,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:28,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-01-28 09:29:28,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:28,513 INFO L130 PetriNetUnfolder]: 469/738 cut-off events. [2023-01-28 09:29:28,514 INFO L131 PetriNetUnfolder]: For 864/985 co-relation queries the response was YES. [2023-01-28 09:29:28,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2295 conditions, 738 events. 469/738 cut-off events. For 864/985 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3069 event pairs, 103 based on Foata normal form. 124/839 useless extension candidates. Maximal degree in co-relation 842. Up to 458 conditions per place. [2023-01-28 09:29:28,540 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 41 selfloop transitions, 5 changer transitions 5/54 dead transitions. [2023-01-28 09:29:28,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 54 transitions, 311 flow [2023-01-28 09:29:28,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 09:29:28,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 09:29:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 380 transitions. [2023-01-28 09:29:28,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5248618784530387 [2023-01-28 09:29:28,543 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 380 transitions. [2023-01-28 09:29:28,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 380 transitions. [2023-01-28 09:29:28,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:28,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 380 transitions. [2023-01-28 09:29:28,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 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) [2023-01-28 09:29:28,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 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) [2023-01-28 09:29:28,545 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 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) [2023-01-28 09:29:28,545 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 119 flow. Second operand 4 states and 380 transitions. [2023-01-28 09:29:28,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 54 transitions, 311 flow [2023-01-28 09:29:28,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 54 transitions, 301 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-01-28 09:29:28,549 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 145 flow [2023-01-28 09:29:28,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2023-01-28 09:29:28,550 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2023-01-28 09:29:28,552 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 145 flow [2023-01-28 09:29:28,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 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) [2023-01-28 09:29:28,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:28,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:28,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 09:29:28,553 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:29:28,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:28,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1297497348, now seen corresponding path program 1 times [2023-01-28 09:29:28,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:28,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95444009] [2023-01-28 09:29:28,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:28,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:28,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:28,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95444009] [2023-01-28 09:29:28,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95444009] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:29:28,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:29:28,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 09:29:28,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985371408] [2023-01-28 09:29:28,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:29:28,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 09:29:28,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:28,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 09:29:28,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 09:29:28,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-01-28 09:29:28,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 145 flow. Second operand has 5 states, 5 states have (on average 83.8) internal successors, (419), 5 states have internal predecessors, (419), 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) [2023-01-28 09:29:28,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:28,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-01-28 09:29:28,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:28,779 INFO L130 PetriNetUnfolder]: 623/1049 cut-off events. [2023-01-28 09:29:28,779 INFO L131 PetriNetUnfolder]: For 2754/2858 co-relation queries the response was YES. [2023-01-28 09:29:28,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3376 conditions, 1049 events. 623/1049 cut-off events. For 2754/2858 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5075 event pairs, 191 based on Foata normal form. 164/1201 useless extension candidates. Maximal degree in co-relation 1674. Up to 527 conditions per place. [2023-01-28 09:29:28,783 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 59 selfloop transitions, 6 changer transitions 6/73 dead transitions. [2023-01-28 09:29:28,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 73 transitions, 458 flow [2023-01-28 09:29:28,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 09:29:28,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 09:29:28,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 462 transitions. [2023-01-28 09:29:28,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104972375690607 [2023-01-28 09:29:28,785 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 462 transitions. [2023-01-28 09:29:28,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 462 transitions. [2023-01-28 09:29:28,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:28,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 462 transitions. [2023-01-28 09:29:28,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 92.4) internal successors, (462), 5 states have internal predecessors, (462), 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) [2023-01-28 09:29:28,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 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) [2023-01-28 09:29:28,787 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 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) [2023-01-28 09:29:28,787 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 145 flow. Second operand 5 states and 462 transitions. [2023-01-28 09:29:28,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 73 transitions, 458 flow [2023-01-28 09:29:28,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 73 transitions, 449 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-28 09:29:28,791 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 200 flow [2023-01-28 09:29:28,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-01-28 09:29:28,791 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2023-01-28 09:29:28,792 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 200 flow [2023-01-28 09:29:28,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.8) internal successors, (419), 5 states have internal predecessors, (419), 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) [2023-01-28 09:29:28,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:28,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:28,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 09:29:28,792 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:29:28,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:28,793 INFO L85 PathProgramCache]: Analyzing trace with hash -612746414, now seen corresponding path program 2 times [2023-01-28 09:29:28,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:28,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484770939] [2023-01-28 09:29:28,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:28,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:28,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:28,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484770939] [2023-01-28 09:29:28,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484770939] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:29:28,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:29:28,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 09:29:28,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134096524] [2023-01-28 09:29:28,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:29:28,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 09:29:28,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:28,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 09:29:28,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 09:29:28,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-01-28 09:29:28,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 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) [2023-01-28 09:29:28,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:28,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-01-28 09:29:28,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:28,967 INFO L130 PetriNetUnfolder]: 839/1400 cut-off events. [2023-01-28 09:29:28,967 INFO L131 PetriNetUnfolder]: For 4717/5125 co-relation queries the response was YES. [2023-01-28 09:29:28,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5499 conditions, 1400 events. 839/1400 cut-off events. For 4717/5125 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 7425 event pairs, 349 based on Foata normal form. 284/1615 useless extension candidates. Maximal degree in co-relation 2061. Up to 835 conditions per place. [2023-01-28 09:29:28,974 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 48 selfloop transitions, 12 changer transitions 3/67 dead transitions. [2023-01-28 09:29:28,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 67 transitions, 527 flow [2023-01-28 09:29:28,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 09:29:28,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 09:29:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 377 transitions. [2023-01-28 09:29:28,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5207182320441989 [2023-01-28 09:29:28,975 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 377 transitions. [2023-01-28 09:29:28,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 377 transitions. [2023-01-28 09:29:28,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:28,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 377 transitions. [2023-01-28 09:29:28,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 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) [2023-01-28 09:29:28,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 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) [2023-01-28 09:29:28,977 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 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) [2023-01-28 09:29:28,977 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 200 flow. Second operand 4 states and 377 transitions. [2023-01-28 09:29:28,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 67 transitions, 527 flow [2023-01-28 09:29:28,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 67 transitions, 510 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-01-28 09:29:28,982 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 330 flow [2023-01-28 09:29:28,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=330, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-01-28 09:29:28,982 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2023-01-28 09:29:28,982 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 330 flow [2023-01-28 09:29:28,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 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) [2023-01-28 09:29:28,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:28,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:28,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 09:29:28,983 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:29:28,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:28,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1085629665, now seen corresponding path program 1 times [2023-01-28 09:29:28,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:28,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430749786] [2023-01-28 09:29:28,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:28,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:29,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:29,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430749786] [2023-01-28 09:29:29,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430749786] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:29:29,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:29:29,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 09:29:29,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307003148] [2023-01-28 09:29:29,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:29:29,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 09:29:29,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:29,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 09:29:29,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 09:29:29,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-01-28 09:29:29,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 330 flow. Second operand has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 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) [2023-01-28 09:29:29,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:29,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-01-28 09:29:29,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:29,179 INFO L130 PetriNetUnfolder]: 880/1445 cut-off events. [2023-01-28 09:29:29,179 INFO L131 PetriNetUnfolder]: For 7838/8234 co-relation queries the response was YES. [2023-01-28 09:29:29,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6571 conditions, 1445 events. 880/1445 cut-off events. For 7838/8234 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 7323 event pairs, 317 based on Foata normal form. 241/1633 useless extension candidates. Maximal degree in co-relation 2369. Up to 1085 conditions per place. [2023-01-28 09:29:29,187 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 49 selfloop transitions, 8 changer transitions 10/71 dead transitions. [2023-01-28 09:29:29,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 71 transitions, 661 flow [2023-01-28 09:29:29,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 09:29:29,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 09:29:29,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 378 transitions. [2023-01-28 09:29:29,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5220994475138122 [2023-01-28 09:29:29,188 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 378 transitions. [2023-01-28 09:29:29,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 378 transitions. [2023-01-28 09:29:29,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:29,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 378 transitions. [2023-01-28 09:29:29,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.5) internal successors, (378), 4 states have internal predecessors, (378), 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) [2023-01-28 09:29:29,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 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) [2023-01-28 09:29:29,190 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 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) [2023-01-28 09:29:29,190 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 330 flow. Second operand 4 states and 378 transitions. [2023-01-28 09:29:29,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 71 transitions, 661 flow [2023-01-28 09:29:29,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 71 transitions, 652 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 09:29:29,195 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 379 flow [2023-01-28 09:29:29,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=379, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2023-01-28 09:29:29,196 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 21 predicate places. [2023-01-28 09:29:29,196 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 379 flow [2023-01-28 09:29:29,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 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) [2023-01-28 09:29:29,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:29,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:29,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 09:29:29,196 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:29:29,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:29,197 INFO L85 PathProgramCache]: Analyzing trace with hash 477800932, now seen corresponding path program 3 times [2023-01-28 09:29:29,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:29,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361240155] [2023-01-28 09:29:29,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:29,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:29,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:29,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:29,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361240155] [2023-01-28 09:29:29,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361240155] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:29:29,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:29:29,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 09:29:29,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709657019] [2023-01-28 09:29:29,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:29:29,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 09:29:29,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:29,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 09:29:29,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 09:29:29,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-01-28 09:29:29,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 379 flow. Second operand has 5 states, 5 states have (on average 83.8) internal successors, (419), 5 states have internal predecessors, (419), 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) [2023-01-28 09:29:29,252 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:29,252 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-01-28 09:29:29,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:29,407 INFO L130 PetriNetUnfolder]: 1052/1733 cut-off events. [2023-01-28 09:29:29,407 INFO L131 PetriNetUnfolder]: For 8779/9064 co-relation queries the response was YES. [2023-01-28 09:29:29,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7905 conditions, 1733 events. 1052/1733 cut-off events. For 8779/9064 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 9211 event pairs, 307 based on Foata normal form. 169/1861 useless extension candidates. Maximal degree in co-relation 4650. Up to 894 conditions per place. [2023-01-28 09:29:29,417 INFO L137 encePairwiseOnDemand]: 174/181 looper letters, 65 selfloop transitions, 19 changer transitions 19/105 dead transitions. [2023-01-28 09:29:29,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 105 transitions, 1055 flow [2023-01-28 09:29:29,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 09:29:29,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 09:29:29,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 545 transitions. [2023-01-28 09:29:29,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.501841620626151 [2023-01-28 09:29:29,419 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 545 transitions. [2023-01-28 09:29:29,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 545 transitions. [2023-01-28 09:29:29,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:29,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 545 transitions. [2023-01-28 09:29:29,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 90.83333333333333) internal successors, (545), 6 states have internal predecessors, (545), 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) [2023-01-28 09:29:29,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 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) [2023-01-28 09:29:29,422 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 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) [2023-01-28 09:29:29,422 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 379 flow. Second operand 6 states and 545 transitions. [2023-01-28 09:29:29,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 105 transitions, 1055 flow [2023-01-28 09:29:29,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 105 transitions, 992 flow, removed 26 selfloop flow, removed 2 redundant places. [2023-01-28 09:29:29,431 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 550 flow [2023-01-28 09:29:29,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=550, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2023-01-28 09:29:29,431 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 27 predicate places. [2023-01-28 09:29:29,431 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 550 flow [2023-01-28 09:29:29,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.8) internal successors, (419), 5 states have internal predecessors, (419), 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) [2023-01-28 09:29:29,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:29,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:29,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 09:29:29,432 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:29:29,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:29,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1700934463, now seen corresponding path program 2 times [2023-01-28 09:29:29,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:29,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128745957] [2023-01-28 09:29:29,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:29,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:29,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:29,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:29,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:29,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128745957] [2023-01-28 09:29:29,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128745957] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:29:29,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:29:29,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 09:29:29,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531316920] [2023-01-28 09:29:29,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:29:29,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 09:29:29,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:29,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 09:29:29,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 09:29:29,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-01-28 09:29:29,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 550 flow. Second operand has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 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) [2023-01-28 09:29:29,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:29,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-01-28 09:29:29,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:29,653 INFO L130 PetriNetUnfolder]: 1045/1689 cut-off events. [2023-01-28 09:29:29,653 INFO L131 PetriNetUnfolder]: For 10769/11037 co-relation queries the response was YES. [2023-01-28 09:29:29,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8448 conditions, 1689 events. 1045/1689 cut-off events. For 10769/11037 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8331 event pairs, 301 based on Foata normal form. 200/1824 useless extension candidates. Maximal degree in co-relation 7762. Up to 1238 conditions per place. [2023-01-28 09:29:29,664 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 60 selfloop transitions, 10 changer transitions 10/86 dead transitions. [2023-01-28 09:29:29,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 86 transitions, 941 flow [2023-01-28 09:29:29,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 09:29:29,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 09:29:29,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 380 transitions. [2023-01-28 09:29:29,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5248618784530387 [2023-01-28 09:29:29,665 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 380 transitions. [2023-01-28 09:29:29,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 380 transitions. [2023-01-28 09:29:29,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:29,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 380 transitions. [2023-01-28 09:29:29,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 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) [2023-01-28 09:29:29,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 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) [2023-01-28 09:29:29,667 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 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) [2023-01-28 09:29:29,667 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 550 flow. Second operand 4 states and 380 transitions. [2023-01-28 09:29:29,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 86 transitions, 941 flow [2023-01-28 09:29:29,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 904 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-01-28 09:29:29,679 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 580 flow [2023-01-28 09:29:29,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=580, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2023-01-28 09:29:29,680 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 28 predicate places. [2023-01-28 09:29:29,680 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 580 flow [2023-01-28 09:29:29,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 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) [2023-01-28 09:29:29,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:29,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:29,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 09:29:29,680 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:29:29,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:29,681 INFO L85 PathProgramCache]: Analyzing trace with hash 2003654564, now seen corresponding path program 4 times [2023-01-28 09:29:29,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:29,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973456258] [2023-01-28 09:29:29,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:29,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:29,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:29,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973456258] [2023-01-28 09:29:29,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973456258] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:29:29,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:29:29,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 09:29:29,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803493198] [2023-01-28 09:29:29,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:29:29,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 09:29:29,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:29,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 09:29:29,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 09:29:29,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-01-28 09:29:29,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 580 flow. Second operand has 5 states, 5 states have (on average 83.8) internal successors, (419), 5 states have internal predecessors, (419), 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) [2023-01-28 09:29:29,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:29,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-01-28 09:29:29,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:29,901 INFO L130 PetriNetUnfolder]: 1002/1586 cut-off events. [2023-01-28 09:29:29,901 INFO L131 PetriNetUnfolder]: For 10884/11184 co-relation queries the response was YES. [2023-01-28 09:29:29,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8309 conditions, 1586 events. 1002/1586 cut-off events. For 10884/11184 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 7449 event pairs, 364 based on Foata normal form. 184/1724 useless extension candidates. Maximal degree in co-relation 5291. Up to 1039 conditions per place. [2023-01-28 09:29:29,909 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 56 selfloop transitions, 12 changer transitions 20/90 dead transitions. [2023-01-28 09:29:29,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 90 transitions, 970 flow [2023-01-28 09:29:29,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 09:29:29,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 09:29:29,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 454 transitions. [2023-01-28 09:29:29,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016574585635359 [2023-01-28 09:29:29,911 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 454 transitions. [2023-01-28 09:29:29,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 454 transitions. [2023-01-28 09:29:29,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:29,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 454 transitions. [2023-01-28 09:29:29,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 90.8) internal successors, (454), 5 states have internal predecessors, (454), 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) [2023-01-28 09:29:29,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 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) [2023-01-28 09:29:29,913 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 181.0) internal successors, (1086), 6 states have internal predecessors, (1086), 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) [2023-01-28 09:29:29,913 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 580 flow. Second operand 5 states and 454 transitions. [2023-01-28 09:29:29,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 90 transitions, 970 flow [2023-01-28 09:29:29,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 90 transitions, 935 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-01-28 09:29:29,922 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 597 flow [2023-01-28 09:29:29,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=597, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2023-01-28 09:29:29,922 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 32 predicate places. [2023-01-28 09:29:29,923 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 597 flow [2023-01-28 09:29:29,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.8) internal successors, (419), 5 states have internal predecessors, (419), 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) [2023-01-28 09:29:29,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:29,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:29,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 09:29:29,923 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:29:29,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:29,923 INFO L85 PathProgramCache]: Analyzing trace with hash 641514423, now seen corresponding path program 3 times [2023-01-28 09:29:29,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:29,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036731257] [2023-01-28 09:29:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:29,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:29,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:29,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036731257] [2023-01-28 09:29:29,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036731257] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:29:29,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:29:29,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 09:29:29,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520804192] [2023-01-28 09:29:29,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:29:29,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 09:29:29,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:29,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 09:29:29,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 09:29:29,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-01-28 09:29:29,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 597 flow. Second operand has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 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) [2023-01-28 09:29:29,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:29,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-01-28 09:29:29,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:30,141 INFO L130 PetriNetUnfolder]: 915/1375 cut-off events. [2023-01-28 09:29:30,142 INFO L131 PetriNetUnfolder]: For 11022/11376 co-relation queries the response was YES. [2023-01-28 09:29:30,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7842 conditions, 1375 events. 915/1375 cut-off events. For 11022/11376 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5997 event pairs, 249 based on Foata normal form. 232/1529 useless extension candidates. Maximal degree in co-relation 6687. Up to 901 conditions per place. [2023-01-28 09:29:30,157 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 54 selfloop transitions, 27 changer transitions 7/94 dead transitions. [2023-01-28 09:29:30,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 94 transitions, 1141 flow [2023-01-28 09:29:30,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 09:29:30,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 09:29:30,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 376 transitions. [2023-01-28 09:29:30,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5193370165745856 [2023-01-28 09:29:30,159 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 376 transitions. [2023-01-28 09:29:30,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 376 transitions. [2023-01-28 09:29:30,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:30,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 376 transitions. [2023-01-28 09:29:30,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 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) [2023-01-28 09:29:30,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 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) [2023-01-28 09:29:30,162 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 181.0) internal successors, (905), 5 states have internal predecessors, (905), 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) [2023-01-28 09:29:30,162 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 597 flow. Second operand 4 states and 376 transitions. [2023-01-28 09:29:30,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 94 transitions, 1141 flow [2023-01-28 09:29:30,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 94 transitions, 1075 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-01-28 09:29:30,171 INFO L231 Difference]: Finished difference. Result has 59 places, 68 transitions, 834 flow [2023-01-28 09:29:30,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=834, PETRI_PLACES=59, PETRI_TRANSITIONS=68} [2023-01-28 09:29:30,173 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 30 predicate places. [2023-01-28 09:29:30,173 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 68 transitions, 834 flow [2023-01-28 09:29:30,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 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) [2023-01-28 09:29:30,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:30,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:30,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 09:29:30,174 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:29:30,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:30,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1824626704, now seen corresponding path program 1 times [2023-01-28 09:29:30,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:30,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309312485] [2023-01-28 09:29:30,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:30,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:30,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:30,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:30,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309312485] [2023-01-28 09:29:30,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309312485] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:30,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900794908] [2023-01-28 09:29:30,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:30,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:30,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:30,254 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) [2023-01-28 09:29:30,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 09:29:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:30,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:29:30,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:30,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:30,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900794908] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:30,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:30,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-28 09:29:30,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077333482] [2023-01-28 09:29:30,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:30,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 09:29:30,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:30,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 09:29:30,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-01-28 09:29:30,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-01-28 09:29:30,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 68 transitions, 834 flow. Second operand has 8 states, 8 states have (on average 83.5) internal successors, (668), 8 states have internal predecessors, (668), 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) [2023-01-28 09:29:30,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:30,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-01-28 09:29:30,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:30,684 INFO L130 PetriNetUnfolder]: 1086/1555 cut-off events. [2023-01-28 09:29:30,685 INFO L131 PetriNetUnfolder]: For 14468/14605 co-relation queries the response was YES. [2023-01-28 09:29:30,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9774 conditions, 1555 events. 1086/1555 cut-off events. For 14468/14605 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 6193 event pairs, 240 based on Foata normal form. 116/1627 useless extension candidates. Maximal degree in co-relation 6510. Up to 1018 conditions per place. [2023-01-28 09:29:30,695 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 81 selfloop transitions, 49 changer transitions 2/136 dead transitions. [2023-01-28 09:29:30,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 136 transitions, 1919 flow [2023-01-28 09:29:30,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 09:29:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 09:29:30,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 539 transitions. [2023-01-28 09:29:30,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.496316758747698 [2023-01-28 09:29:30,697 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 539 transitions. [2023-01-28 09:29:30,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 539 transitions. [2023-01-28 09:29:30,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:30,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 539 transitions. [2023-01-28 09:29:30,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.83333333333333) internal successors, (539), 6 states have internal predecessors, (539), 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) [2023-01-28 09:29:30,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 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) [2023-01-28 09:29:30,700 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 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) [2023-01-28 09:29:30,700 INFO L175 Difference]: Start difference. First operand has 59 places, 68 transitions, 834 flow. Second operand 6 states and 539 transitions. [2023-01-28 09:29:30,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 136 transitions, 1919 flow [2023-01-28 09:29:30,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 136 transitions, 1885 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-01-28 09:29:30,714 INFO L231 Difference]: Finished difference. Result has 63 places, 104 transitions, 1582 flow [2023-01-28 09:29:30,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1582, PETRI_PLACES=63, PETRI_TRANSITIONS=104} [2023-01-28 09:29:30,715 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 34 predicate places. [2023-01-28 09:29:30,715 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 104 transitions, 1582 flow [2023-01-28 09:29:30,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 83.5) internal successors, (668), 8 states have internal predecessors, (668), 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) [2023-01-28 09:29:30,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:30,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:30,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 09:29:30,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-28 09:29:30,924 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:29:30,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:30,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1346321687, now seen corresponding path program 1 times [2023-01-28 09:29:30,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:30,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052563055] [2023-01-28 09:29:30,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:30,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:30,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:31,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:31,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052563055] [2023-01-28 09:29:31,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052563055] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:31,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286822869] [2023-01-28 09:29:31,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:31,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:31,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:31,148 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) [2023-01-28 09:29:31,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 09:29:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:31,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 09:29:31,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:31,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:31,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:31,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286822869] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:31,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:31,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-01-28 09:29:31,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649983006] [2023-01-28 09:29:31,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:31,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 09:29:31,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:31,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 09:29:31,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-01-28 09:29:31,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-01-28 09:29:31,413 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 104 transitions, 1582 flow. Second operand has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 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) [2023-01-28 09:29:31,413 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:31,413 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-01-28 09:29:31,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:31,703 INFO L130 PetriNetUnfolder]: 1418/2025 cut-off events. [2023-01-28 09:29:31,704 INFO L131 PetriNetUnfolder]: For 22489/23121 co-relation queries the response was YES. [2023-01-28 09:29:31,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13604 conditions, 2025 events. 1418/2025 cut-off events. For 22489/23121 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 8150 event pairs, 48 based on Foata normal form. 155/2070 useless extension candidates. Maximal degree in co-relation 12560. Up to 1439 conditions per place. [2023-01-28 09:29:31,716 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 127 selfloop transitions, 55 changer transitions 2/195 dead transitions. [2023-01-28 09:29:31,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 195 transitions, 2593 flow [2023-01-28 09:29:31,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 09:29:31,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 09:29:31,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 849 transitions. [2023-01-28 09:29:31,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5211786372007366 [2023-01-28 09:29:31,718 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 849 transitions. [2023-01-28 09:29:31,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 849 transitions. [2023-01-28 09:29:31,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:31,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 849 transitions. [2023-01-28 09:29:31,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.33333333333333) internal successors, (849), 9 states have internal predecessors, (849), 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) [2023-01-28 09:29:31,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 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) [2023-01-28 09:29:31,722 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 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) [2023-01-28 09:29:31,722 INFO L175 Difference]: Start difference. First operand has 63 places, 104 transitions, 1582 flow. Second operand 9 states and 849 transitions. [2023-01-28 09:29:31,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 195 transitions, 2593 flow [2023-01-28 09:29:31,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 195 transitions, 2405 flow, removed 82 selfloop flow, removed 1 redundant places. [2023-01-28 09:29:31,740 INFO L231 Difference]: Finished difference. Result has 73 places, 135 transitions, 2039 flow [2023-01-28 09:29:31,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=1414, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2039, PETRI_PLACES=73, PETRI_TRANSITIONS=135} [2023-01-28 09:29:31,741 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2023-01-28 09:29:31,741 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 135 transitions, 2039 flow [2023-01-28 09:29:31,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 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) [2023-01-28 09:29:31,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:31,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:31,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-28 09:29:31,946 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,SelfDestructingSolverStorable11 [2023-01-28 09:29:31,947 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:29:31,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:31,947 INFO L85 PathProgramCache]: Analyzing trace with hash 684593127, now seen corresponding path program 2 times [2023-01-28 09:29:31,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:31,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207130782] [2023-01-28 09:29:31,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:31,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:32,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:32,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207130782] [2023-01-28 09:29:32,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207130782] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:32,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025686225] [2023-01-28 09:29:32,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:29:32,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:32,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:32,111 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) [2023-01-28 09:29:32,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 09:29:32,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:29:32,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:32,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 09:29:32,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:32,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:32,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:32,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025686225] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:32,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:32,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 10 [2023-01-28 09:29:32,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669969431] [2023-01-28 09:29:32,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:32,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 09:29:32,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:32,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 09:29:32,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-01-28 09:29:32,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-01-28 09:29:32,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 135 transitions, 2039 flow. Second operand has 12 states, 12 states have (on average 87.16666666666667) internal successors, (1046), 12 states have internal predecessors, (1046), 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) [2023-01-28 09:29:32,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:32,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-01-28 09:29:32,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:32,680 INFO L130 PetriNetUnfolder]: 1752/2515 cut-off events. [2023-01-28 09:29:32,680 INFO L131 PetriNetUnfolder]: For 28904/29412 co-relation queries the response was YES. [2023-01-28 09:29:32,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17049 conditions, 2515 events. 1752/2515 cut-off events. For 28904/29412 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 10618 event pairs, 188 based on Foata normal form. 149/2542 useless extension candidates. Maximal degree in co-relation 16355. Up to 1963 conditions per place. [2023-01-28 09:29:32,695 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 142 selfloop transitions, 55 changer transitions 2/210 dead transitions. [2023-01-28 09:29:32,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 210 transitions, 2913 flow [2023-01-28 09:29:32,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 09:29:32,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 09:29:32,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 845 transitions. [2023-01-28 09:29:32,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5187231430325353 [2023-01-28 09:29:32,697 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 845 transitions. [2023-01-28 09:29:32,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 845 transitions. [2023-01-28 09:29:32,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:32,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 845 transitions. [2023-01-28 09:29:32,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 93.88888888888889) internal successors, (845), 9 states have internal predecessors, (845), 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) [2023-01-28 09:29:32,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 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) [2023-01-28 09:29:32,700 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 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) [2023-01-28 09:29:32,700 INFO L175 Difference]: Start difference. First operand has 73 places, 135 transitions, 2039 flow. Second operand 9 states and 845 transitions. [2023-01-28 09:29:32,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 210 transitions, 2913 flow [2023-01-28 09:29:32,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 210 transitions, 2673 flow, removed 108 selfloop flow, removed 1 redundant places. [2023-01-28 09:29:32,726 INFO L231 Difference]: Finished difference. Result has 83 places, 154 transitions, 2238 flow [2023-01-28 09:29:32,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=1799, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2238, PETRI_PLACES=83, PETRI_TRANSITIONS=154} [2023-01-28 09:29:32,727 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 54 predicate places. [2023-01-28 09:29:32,727 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 154 transitions, 2238 flow [2023-01-28 09:29:32,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 87.16666666666667) internal successors, (1046), 12 states have internal predecessors, (1046), 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) [2023-01-28 09:29:32,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:32,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:32,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-28 09:29:32,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:32,932 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:29:32,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:32,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1615995569, now seen corresponding path program 3 times [2023-01-28 09:29:32,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:32,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217914619] [2023-01-28 09:29:32,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:32,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:33,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:33,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:33,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217914619] [2023-01-28 09:29:33,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217914619] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:33,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667327201] [2023-01-28 09:29:33,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:29:33,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:33,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:33,108 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) [2023-01-28 09:29:33,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 09:29:33,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 09:29:33,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:33,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 09:29:33,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:33,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:33,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667327201] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:33,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:33,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-01-28 09:29:33,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020553112] [2023-01-28 09:29:33,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:33,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 09:29:33,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:33,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 09:29:33,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-01-28 09:29:33,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-01-28 09:29:33,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 154 transitions, 2238 flow. Second operand has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 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) [2023-01-28 09:29:33,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:33,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-01-28 09:29:33,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:33,785 INFO L130 PetriNetUnfolder]: 2212/3181 cut-off events. [2023-01-28 09:29:33,786 INFO L131 PetriNetUnfolder]: For 36433/37003 co-relation queries the response was YES. [2023-01-28 09:29:33,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20923 conditions, 3181 events. 2212/3181 cut-off events. For 36433/37003 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13981 event pairs, 350 based on Foata normal form. 183/3222 useless extension candidates. Maximal degree in co-relation 20423. Up to 2597 conditions per place. [2023-01-28 09:29:33,801 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 173 selfloop transitions, 60 changer transitions 2/246 dead transitions. [2023-01-28 09:29:33,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 246 transitions, 3494 flow [2023-01-28 09:29:33,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 09:29:33,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 09:29:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 845 transitions. [2023-01-28 09:29:33,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5187231430325353 [2023-01-28 09:29:33,803 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 845 transitions. [2023-01-28 09:29:33,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 845 transitions. [2023-01-28 09:29:33,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:33,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 845 transitions. [2023-01-28 09:29:33,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 93.88888888888889) internal successors, (845), 9 states have internal predecessors, (845), 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) [2023-01-28 09:29:33,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 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) [2023-01-28 09:29:33,807 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 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) [2023-01-28 09:29:33,807 INFO L175 Difference]: Start difference. First operand has 83 places, 154 transitions, 2238 flow. Second operand 9 states and 845 transitions. [2023-01-28 09:29:33,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 246 transitions, 3494 flow [2023-01-28 09:29:33,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 246 transitions, 3273 flow, removed 88 selfloop flow, removed 2 redundant places. [2023-01-28 09:29:33,837 INFO L231 Difference]: Finished difference. Result has 93 places, 190 transitions, 2823 flow [2023-01-28 09:29:33,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=2017, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2823, PETRI_PLACES=93, PETRI_TRANSITIONS=190} [2023-01-28 09:29:33,837 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 64 predicate places. [2023-01-28 09:29:33,838 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 190 transitions, 2823 flow [2023-01-28 09:29:33,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 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) [2023-01-28 09:29:33,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:33,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:33,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 09:29:34,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:34,043 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:29:34,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:34,043 INFO L85 PathProgramCache]: Analyzing trace with hash -965213615, now seen corresponding path program 4 times [2023-01-28 09:29:34,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:34,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478274979] [2023-01-28 09:29:34,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:34,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:34,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:34,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478274979] [2023-01-28 09:29:34,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478274979] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:34,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931388009] [2023-01-28 09:29:34,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:29:34,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:34,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:34,213 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) [2023-01-28 09:29:34,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 09:29:34,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:29:34,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:34,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 09:29:34,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:34,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:34,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931388009] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:34,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:34,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-01-28 09:29:34,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231741675] [2023-01-28 09:29:34,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:34,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 09:29:34,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:34,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 09:29:34,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-01-28 09:29:34,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-01-28 09:29:34,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 190 transitions, 2823 flow. Second operand has 9 states, 9 states have (on average 87.33333333333333) internal successors, (786), 9 states have internal predecessors, (786), 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) [2023-01-28 09:29:34,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:34,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-01-28 09:29:34,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:34,877 INFO L130 PetriNetUnfolder]: 2520/3633 cut-off events. [2023-01-28 09:29:34,877 INFO L131 PetriNetUnfolder]: For 43800/44378 co-relation queries the response was YES. [2023-01-28 09:29:34,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23906 conditions, 3633 events. 2520/3633 cut-off events. For 43800/44378 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 16416 event pairs, 494 based on Foata normal form. 175/3660 useless extension candidates. Maximal degree in co-relation 23393. Up to 3113 conditions per place. [2023-01-28 09:29:34,899 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 186 selfloop transitions, 60 changer transitions 2/259 dead transitions. [2023-01-28 09:29:34,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 259 transitions, 3865 flow [2023-01-28 09:29:34,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 09:29:34,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 09:29:34,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 839 transitions. [2023-01-28 09:29:34,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5150399017802333 [2023-01-28 09:29:34,901 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 839 transitions. [2023-01-28 09:29:34,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 839 transitions. [2023-01-28 09:29:34,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:34,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 839 transitions. [2023-01-28 09:29:34,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 93.22222222222223) internal successors, (839), 9 states have internal predecessors, (839), 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) [2023-01-28 09:29:34,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 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) [2023-01-28 09:29:34,904 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 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) [2023-01-28 09:29:34,904 INFO L175 Difference]: Start difference. First operand has 93 places, 190 transitions, 2823 flow. Second operand 9 states and 839 transitions. [2023-01-28 09:29:34,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 259 transitions, 3865 flow [2023-01-28 09:29:34,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 259 transitions, 3537 flow, removed 152 selfloop flow, removed 1 redundant places. [2023-01-28 09:29:34,953 INFO L231 Difference]: Finished difference. Result has 103 places, 209 transitions, 3016 flow [2023-01-28 09:29:34,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=2495, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3016, PETRI_PLACES=103, PETRI_TRANSITIONS=209} [2023-01-28 09:29:34,953 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 74 predicate places. [2023-01-28 09:29:34,953 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 209 transitions, 3016 flow [2023-01-28 09:29:34,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 87.33333333333333) internal successors, (786), 9 states have internal predecessors, (786), 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) [2023-01-28 09:29:34,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:34,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:34,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-01-28 09:29:35,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 09:29:35,162 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:29:35,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:35,163 INFO L85 PathProgramCache]: Analyzing trace with hash 453609461, now seen corresponding path program 5 times [2023-01-28 09:29:35,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:35,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458918294] [2023-01-28 09:29:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:35,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:35,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:35,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458918294] [2023-01-28 09:29:35,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458918294] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:35,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193672371] [2023-01-28 09:29:35,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:29:35,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:35,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:35,348 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) [2023-01-28 09:29:35,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 09:29:35,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 09:29:35,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:35,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 09:29:35,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:35,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:29:35,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193672371] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:35,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:35,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-01-28 09:29:35,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423257810] [2023-01-28 09:29:35,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:35,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 09:29:35,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:35,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 09:29:35,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-01-28 09:29:35,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-01-28 09:29:35,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 209 transitions, 3016 flow. Second operand has 10 states, 10 states have (on average 87.7) internal successors, (877), 10 states have internal predecessors, (877), 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) [2023-01-28 09:29:35,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:35,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-01-28 09:29:35,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:36,252 INFO L130 PetriNetUnfolder]: 2914/4205 cut-off events. [2023-01-28 09:29:36,252 INFO L131 PetriNetUnfolder]: For 49997/50637 co-relation queries the response was YES. [2023-01-28 09:29:36,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27200 conditions, 4205 events. 2914/4205 cut-off events. For 49997/50637 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19652 event pairs, 614 based on Foata normal form. 205/4256 useless extension candidates. Maximal degree in co-relation 26645. Up to 3685 conditions per place. [2023-01-28 09:29:36,279 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 220 selfloop transitions, 61 changer transitions 2/294 dead transitions. [2023-01-28 09:29:36,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 294 transitions, 4461 flow [2023-01-28 09:29:36,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 09:29:36,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 09:29:36,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 837 transitions. [2023-01-28 09:29:36,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138121546961326 [2023-01-28 09:29:36,282 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 837 transitions. [2023-01-28 09:29:36,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 837 transitions. [2023-01-28 09:29:36,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:36,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 837 transitions. [2023-01-28 09:29:36,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 93.0) internal successors, (837), 9 states have internal predecessors, (837), 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) [2023-01-28 09:29:36,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 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) [2023-01-28 09:29:36,285 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 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) [2023-01-28 09:29:36,285 INFO L175 Difference]: Start difference. First operand has 103 places, 209 transitions, 3016 flow. Second operand 9 states and 837 transitions. [2023-01-28 09:29:36,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 294 transitions, 4461 flow [2023-01-28 09:29:36,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 294 transitions, 4174 flow, removed 120 selfloop flow, removed 2 redundant places. [2023-01-28 09:29:36,345 INFO L231 Difference]: Finished difference. Result has 113 places, 246 transitions, 3631 flow [2023-01-28 09:29:36,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=2729, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3631, PETRI_PLACES=113, PETRI_TRANSITIONS=246} [2023-01-28 09:29:36,346 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 84 predicate places. [2023-01-28 09:29:36,346 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 246 transitions, 3631 flow [2023-01-28 09:29:36,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 87.7) internal successors, (877), 10 states have internal predecessors, (877), 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) [2023-01-28 09:29:36,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:36,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:36,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 09:29:36,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 09:29:36,552 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:29:36,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:36,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1955925559, now seen corresponding path program 6 times [2023-01-28 09:29:36,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:36,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808301921] [2023-01-28 09:29:36,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:36,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:36,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:36,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808301921] [2023-01-28 09:29:36,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808301921] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:36,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636767068] [2023-01-28 09:29:36,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:29:36,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:36,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:36,746 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) [2023-01-28 09:29:36,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 09:29:36,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 09:29:36,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:36,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 09:29:36,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:36,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:36,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636767068] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:36,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:36,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-01-28 09:29:36,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885263595] [2023-01-28 09:29:36,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:36,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 09:29:36,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:36,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 09:29:36,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-01-28 09:29:36,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 181 [2023-01-28 09:29:36,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 246 transitions, 3631 flow. Second operand has 10 states, 10 states have (on average 87.6) internal successors, (876), 10 states have internal predecessors, (876), 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) [2023-01-28 09:29:36,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:36,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 181 [2023-01-28 09:29:36,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:37,570 INFO L130 PetriNetUnfolder]: 3248/4695 cut-off events. [2023-01-28 09:29:37,571 INFO L131 PetriNetUnfolder]: For 58768/59424 co-relation queries the response was YES. [2023-01-28 09:29:37,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30469 conditions, 4695 events. 3248/4695 cut-off events. For 58768/59424 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 22527 event pairs, 766 based on Foata normal form. 219/4762 useless extension candidates. Maximal degree in co-relation 29879. Up to 4143 conditions per place. [2023-01-28 09:29:37,597 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 241 selfloop transitions, 61 changer transitions 2/315 dead transitions. [2023-01-28 09:29:37,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 315 transitions, 4864 flow [2023-01-28 09:29:37,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 09:29:37,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 09:29:37,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 839 transitions. [2023-01-28 09:29:37,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5150399017802333 [2023-01-28 09:29:37,599 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 839 transitions. [2023-01-28 09:29:37,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 839 transitions. [2023-01-28 09:29:37,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:37,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 839 transitions. [2023-01-28 09:29:37,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 93.22222222222223) internal successors, (839), 9 states have internal predecessors, (839), 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) [2023-01-28 09:29:37,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 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) [2023-01-28 09:29:37,603 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 181.0) internal successors, (1810), 10 states have internal predecessors, (1810), 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) [2023-01-28 09:29:37,603 INFO L175 Difference]: Start difference. First operand has 113 places, 246 transitions, 3631 flow. Second operand 9 states and 839 transitions. [2023-01-28 09:29:37,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 315 transitions, 4864 flow [2023-01-28 09:29:37,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 315 transitions, 4480 flow, removed 180 selfloop flow, removed 1 redundant places. [2023-01-28 09:29:37,665 INFO L231 Difference]: Finished difference. Result has 123 places, 265 transitions, 3829 flow [2023-01-28 09:29:37,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=3247, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3829, PETRI_PLACES=123, PETRI_TRANSITIONS=265} [2023-01-28 09:29:37,666 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 94 predicate places. [2023-01-28 09:29:37,666 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 265 transitions, 3829 flow [2023-01-28 09:29:37,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 87.6) internal successors, (876), 10 states have internal predecessors, (876), 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) [2023-01-28 09:29:37,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:37,666 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:37,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-01-28 09:29:37,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:37,871 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:29:37,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:37,872 INFO L85 PathProgramCache]: Analyzing trace with hash 398392542, now seen corresponding path program 7 times [2023-01-28 09:29:37,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:37,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161138376] [2023-01-28 09:29:37,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:37,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:37,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:37,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161138376] [2023-01-28 09:29:37,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161138376] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:37,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708403097] [2023-01-28 09:29:37,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 09:29:37,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:37,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:37,981 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:29:38,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 09:29:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:38,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 09:29:38,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:38,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:38,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708403097] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:38,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:38,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-01-28 09:29:38,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370863908] [2023-01-28 09:29:38,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:38,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 09:29:38,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:38,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 09:29:38,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-01-28 09:29:38,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-01-28 09:29:38,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 265 transitions, 3829 flow. Second operand has 12 states, 12 states have (on average 83.0) internal successors, (996), 12 states have internal predecessors, (996), 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) [2023-01-28 09:29:38,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:38,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-01-28 09:29:38,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:39,455 INFO L130 PetriNetUnfolder]: 6025/8816 cut-off events. [2023-01-28 09:29:39,455 INFO L131 PetriNetUnfolder]: For 95826/96115 co-relation queries the response was YES. [2023-01-28 09:29:39,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53796 conditions, 8816 events. 6025/8816 cut-off events. For 95826/96115 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 45744 event pairs, 1153 based on Foata normal form. 211/8954 useless extension candidates. Maximal degree in co-relation 52165. Up to 2469 conditions per place. [2023-01-28 09:29:39,505 INFO L137 encePairwiseOnDemand]: 176/181 looper letters, 384 selfloop transitions, 114 changer transitions 0/502 dead transitions. [2023-01-28 09:29:39,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 502 transitions, 7721 flow [2023-01-28 09:29:39,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 09:29:39,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 09:29:39,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 920 transitions. [2023-01-28 09:29:39,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082872928176796 [2023-01-28 09:29:39,508 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 920 transitions. [2023-01-28 09:29:39,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 920 transitions. [2023-01-28 09:29:39,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:39,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 920 transitions. [2023-01-28 09:29:39,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 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) [2023-01-28 09:29:39,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 181.0) internal successors, (1991), 11 states have internal predecessors, (1991), 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) [2023-01-28 09:29:39,511 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 181.0) internal successors, (1991), 11 states have internal predecessors, (1991), 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) [2023-01-28 09:29:39,511 INFO L175 Difference]: Start difference. First operand has 123 places, 265 transitions, 3829 flow. Second operand 10 states and 920 transitions. [2023-01-28 09:29:39,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 502 transitions, 7721 flow [2023-01-28 09:29:39,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 502 transitions, 7139 flow, removed 264 selfloop flow, removed 2 redundant places. [2023-01-28 09:29:39,662 INFO L231 Difference]: Finished difference. Result has 137 places, 313 transitions, 4577 flow [2023-01-28 09:29:39,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=3475, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4577, PETRI_PLACES=137, PETRI_TRANSITIONS=313} [2023-01-28 09:29:39,663 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 108 predicate places. [2023-01-28 09:29:39,663 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 313 transitions, 4577 flow [2023-01-28 09:29:39,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 83.0) internal successors, (996), 12 states have internal predecessors, (996), 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) [2023-01-28 09:29:39,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:39,664 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:39,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 09:29:39,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 09:29:39,867 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:29:39,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:39,867 INFO L85 PathProgramCache]: Analyzing trace with hash 370733874, now seen corresponding path program 8 times [2023-01-28 09:29:39,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:39,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603099873] [2023-01-28 09:29:39,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:39,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:29:40,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:40,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603099873] [2023-01-28 09:29:40,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603099873] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:40,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838416193] [2023-01-28 09:29:40,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:29:40,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:40,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:40,009 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:29:40,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 09:29:40,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:29:40,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:40,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 09:29:40,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:29:40,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:40,186 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:29:40,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838416193] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:40,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:40,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 09:29:40,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573147311] [2023-01-28 09:29:40,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:40,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 09:29:40,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:40,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 09:29:40,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-01-28 09:29:40,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-01-28 09:29:40,198 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 313 transitions, 4577 flow. Second operand has 12 states, 12 states have (on average 82.58333333333333) internal successors, (991), 12 states have internal predecessors, (991), 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) [2023-01-28 09:29:40,198 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:40,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-01-28 09:29:40,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:41,741 INFO L130 PetriNetUnfolder]: 6565/9804 cut-off events. [2023-01-28 09:29:41,741 INFO L131 PetriNetUnfolder]: For 131046/131428 co-relation queries the response was YES. [2023-01-28 09:29:41,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60324 conditions, 9804 events. 6565/9804 cut-off events. For 131046/131428 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 55284 event pairs, 1032 based on Foata normal form. 379/10130 useless extension candidates. Maximal degree in co-relation 58619. Up to 3362 conditions per place. [2023-01-28 09:29:41,797 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 542 selfloop transitions, 161 changer transitions 0/707 dead transitions. [2023-01-28 09:29:41,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 707 transitions, 10612 flow [2023-01-28 09:29:41,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 09:29:41,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 09:29:41,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1084 transitions. [2023-01-28 09:29:41,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4990791896869245 [2023-01-28 09:29:41,799 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1084 transitions. [2023-01-28 09:29:41,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1084 transitions. [2023-01-28 09:29:41,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:41,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1084 transitions. [2023-01-28 09:29:41,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 90.33333333333333) internal successors, (1084), 12 states have internal predecessors, (1084), 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) [2023-01-28 09:29:41,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 181.0) internal successors, (2353), 13 states have internal predecessors, (2353), 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) [2023-01-28 09:29:41,803 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 181.0) internal successors, (2353), 13 states have internal predecessors, (2353), 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) [2023-01-28 09:29:41,803 INFO L175 Difference]: Start difference. First operand has 137 places, 313 transitions, 4577 flow. Second operand 12 states and 1084 transitions. [2023-01-28 09:29:41,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 707 transitions, 10612 flow [2023-01-28 09:29:42,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 707 transitions, 10519 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-01-28 09:29:42,078 INFO L231 Difference]: Finished difference. Result has 152 places, 399 transitions, 6312 flow [2023-01-28 09:29:42,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=4507, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6312, PETRI_PLACES=152, PETRI_TRANSITIONS=399} [2023-01-28 09:29:42,079 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 123 predicate places. [2023-01-28 09:29:42,079 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 399 transitions, 6312 flow [2023-01-28 09:29:42,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 82.58333333333333) internal successors, (991), 12 states have internal predecessors, (991), 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) [2023-01-28 09:29:42,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:42,079 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:42,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 09:29:42,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:42,280 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:29:42,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:42,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1508408662, now seen corresponding path program 9 times [2023-01-28 09:29:42,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:42,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308872973] [2023-01-28 09:29:42,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:42,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:42,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:42,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308872973] [2023-01-28 09:29:42,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308872973] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:42,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805943956] [2023-01-28 09:29:42,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:29:42,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:42,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:42,388 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:29:42,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 09:29:42,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 09:29:42,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:42,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 09:29:42,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:42,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:42,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805943956] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:42,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:42,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2023-01-28 09:29:42,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614676213] [2023-01-28 09:29:42,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:42,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 09:29:42,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:42,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 09:29:42,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-01-28 09:29:42,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 181 [2023-01-28 09:29:42,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 399 transitions, 6312 flow. Second operand has 13 states, 13 states have (on average 79.61538461538461) internal successors, (1035), 13 states have internal predecessors, (1035), 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) [2023-01-28 09:29:42,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:42,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 181 [2023-01-28 09:29:42,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:44,875 INFO L130 PetriNetUnfolder]: 9129/13642 cut-off events. [2023-01-28 09:29:44,875 INFO L131 PetriNetUnfolder]: For 192789/192789 co-relation queries the response was YES. [2023-01-28 09:29:44,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96810 conditions, 13642 events. 9129/13642 cut-off events. For 192789/192789 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 79594 event pairs, 1429 based on Foata normal form. 136/13778 useless extension candidates. Maximal degree in co-relation 94851. Up to 3821 conditions per place. [2023-01-28 09:29:44,963 INFO L137 encePairwiseOnDemand]: 174/181 looper letters, 482 selfloop transitions, 314 changer transitions 0/796 dead transitions. [2023-01-28 09:29:44,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 796 transitions, 14072 flow [2023-01-28 09:29:44,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 09:29:44,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 09:29:44,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1655 transitions. [2023-01-28 09:29:44,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4812445478336726 [2023-01-28 09:29:44,966 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1655 transitions. [2023-01-28 09:29:44,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1655 transitions. [2023-01-28 09:29:44,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:44,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1655 transitions. [2023-01-28 09:29:44,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 87.10526315789474) internal successors, (1655), 19 states have internal predecessors, (1655), 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) [2023-01-28 09:29:44,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 181.0) internal successors, (3620), 20 states have internal predecessors, (3620), 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) [2023-01-28 09:29:44,972 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 181.0) internal successors, (3620), 20 states have internal predecessors, (3620), 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) [2023-01-28 09:29:44,972 INFO L175 Difference]: Start difference. First operand has 152 places, 399 transitions, 6312 flow. Second operand 19 states and 1655 transitions. [2023-01-28 09:29:44,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 796 transitions, 14072 flow [2023-01-28 09:29:45,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 796 transitions, 13414 flow, removed 239 selfloop flow, removed 1 redundant places. [2023-01-28 09:29:45,762 INFO L231 Difference]: Finished difference. Result has 181 places, 544 transitions, 9924 flow [2023-01-28 09:29:45,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=5960, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9924, PETRI_PLACES=181, PETRI_TRANSITIONS=544} [2023-01-28 09:29:45,763 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 152 predicate places. [2023-01-28 09:29:45,763 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 544 transitions, 9924 flow [2023-01-28 09:29:45,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 79.61538461538461) internal successors, (1035), 13 states have internal predecessors, (1035), 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) [2023-01-28 09:29:45,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:45,764 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:45,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 09:29:45,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:45,968 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:29:45,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:45,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1869920993, now seen corresponding path program 10 times [2023-01-28 09:29:45,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:45,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671744496] [2023-01-28 09:29:45,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:45,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:46,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:46,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671744496] [2023-01-28 09:29:46,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671744496] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:46,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315278303] [2023-01-28 09:29:46,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:29:46,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:46,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:46,081 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:29:46,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 09:29:46,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:29:46,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:46,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 09:29:46,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:46,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:46,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315278303] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:46,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:46,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 09:29:46,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504043032] [2023-01-28 09:29:46,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:46,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 09:29:46,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:46,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 09:29:46,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-01-28 09:29:46,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-01-28 09:29:46,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 544 transitions, 9924 flow. Second operand has 12 states, 12 states have (on average 83.0) internal successors, (996), 12 states have internal predecessors, (996), 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) [2023-01-28 09:29:46,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:46,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-01-28 09:29:46,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:49,016 INFO L130 PetriNetUnfolder]: 9529/14689 cut-off events. [2023-01-28 09:29:49,017 INFO L131 PetriNetUnfolder]: For 321607/321954 co-relation queries the response was YES. [2023-01-28 09:29:49,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112168 conditions, 14689 events. 9529/14689 cut-off events. For 321607/321954 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 93071 event pairs, 1858 based on Foata normal form. 651/15306 useless extension candidates. Maximal degree in co-relation 110057. Up to 5162 conditions per place. [2023-01-28 09:29:49,121 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 627 selfloop transitions, 309 changer transitions 57/1000 dead transitions. [2023-01-28 09:29:49,121 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 1000 transitions, 19252 flow [2023-01-28 09:29:49,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 09:29:49,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 09:29:49,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1076 transitions. [2023-01-28 09:29:49,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4953959484346225 [2023-01-28 09:29:49,125 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1076 transitions. [2023-01-28 09:29:49,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1076 transitions. [2023-01-28 09:29:49,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:49,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1076 transitions. [2023-01-28 09:29:49,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 89.66666666666667) internal successors, (1076), 12 states have internal predecessors, (1076), 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) [2023-01-28 09:29:49,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 181.0) internal successors, (2353), 13 states have internal predecessors, (2353), 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) [2023-01-28 09:29:49,129 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 181.0) internal successors, (2353), 13 states have internal predecessors, (2353), 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) [2023-01-28 09:29:49,129 INFO L175 Difference]: Start difference. First operand has 181 places, 544 transitions, 9924 flow. Second operand 12 states and 1076 transitions. [2023-01-28 09:29:49,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 1000 transitions, 19252 flow [2023-01-28 09:29:50,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 1000 transitions, 18400 flow, removed 426 selfloop flow, removed 0 redundant places. [2023-01-28 09:29:50,886 INFO L231 Difference]: Finished difference. Result has 196 places, 662 transitions, 12095 flow [2023-01-28 09:29:50,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=9340, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12095, PETRI_PLACES=196, PETRI_TRANSITIONS=662} [2023-01-28 09:29:50,886 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 167 predicate places. [2023-01-28 09:29:50,887 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 662 transitions, 12095 flow [2023-01-28 09:29:50,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 83.0) internal successors, (996), 12 states have internal predecessors, (996), 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) [2023-01-28 09:29:50,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:50,887 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:50,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-01-28 09:29:51,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-01-28 09:29:51,091 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:29:51,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:51,092 INFO L85 PathProgramCache]: Analyzing trace with hash 759710336, now seen corresponding path program 11 times [2023-01-28 09:29:51,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:51,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392301052] [2023-01-28 09:29:51,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:51,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:51,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:51,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392301052] [2023-01-28 09:29:51,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392301052] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:51,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398335695] [2023-01-28 09:29:51,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:29:51,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:51,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:51,240 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:29:51,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 09:29:51,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 09:29:51,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:51,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 09:29:51,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:51,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:51,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:51,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398335695] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:51,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:51,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-28 09:29:51,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392284759] [2023-01-28 09:29:51,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:51,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 09:29:51,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:51,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 09:29:51,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-01-28 09:29:51,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-01-28 09:29:51,430 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 662 transitions, 12095 flow. Second operand has 16 states, 16 states have (on average 82.1875) internal successors, (1315), 16 states have internal predecessors, (1315), 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) [2023-01-28 09:29:51,430 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:51,430 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-01-28 09:29:51,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:29:55,412 INFO L130 PetriNetUnfolder]: 12256/18912 cut-off events. [2023-01-28 09:29:55,412 INFO L131 PetriNetUnfolder]: For 510180/511167 co-relation queries the response was YES. [2023-01-28 09:29:55,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154470 conditions, 18912 events. 12256/18912 cut-off events. For 510180/511167 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 125729 event pairs, 3713 based on Foata normal form. 525/19315 useless extension candidates. Maximal degree in co-relation 153036. Up to 7877 conditions per place. [2023-01-28 09:29:55,616 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 538 selfloop transitions, 527 changer transitions 0/1074 dead transitions. [2023-01-28 09:29:55,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 1074 transitions, 21588 flow [2023-01-28 09:29:55,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 09:29:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 09:29:55,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1386 transitions. [2023-01-28 09:29:55,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104972375690607 [2023-01-28 09:29:55,619 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1386 transitions. [2023-01-28 09:29:55,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1386 transitions. [2023-01-28 09:29:55,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:29:55,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1386 transitions. [2023-01-28 09:29:55,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 92.4) internal successors, (1386), 15 states have internal predecessors, (1386), 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) [2023-01-28 09:29:55,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 181.0) internal successors, (2896), 16 states have internal predecessors, (2896), 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) [2023-01-28 09:29:55,623 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 181.0) internal successors, (2896), 16 states have internal predecessors, (2896), 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) [2023-01-28 09:29:55,623 INFO L175 Difference]: Start difference. First operand has 196 places, 662 transitions, 12095 flow. Second operand 15 states and 1386 transitions. [2023-01-28 09:29:55,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 1074 transitions, 21588 flow [2023-01-28 09:29:59,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 1074 transitions, 20884 flow, removed 352 selfloop flow, removed 0 redundant places. [2023-01-28 09:29:59,116 INFO L231 Difference]: Finished difference. Result has 218 places, 808 transitions, 16694 flow [2023-01-28 09:29:59,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=11895, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=16694, PETRI_PLACES=218, PETRI_TRANSITIONS=808} [2023-01-28 09:29:59,117 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 189 predicate places. [2023-01-28 09:29:59,117 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 808 transitions, 16694 flow [2023-01-28 09:29:59,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.1875) internal successors, (1315), 16 states have internal predecessors, (1315), 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) [2023-01-28 09:29:59,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:59,117 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:59,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 09:29:59,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-01-28 09:29:59,321 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:29:59,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:59,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1097498205, now seen corresponding path program 12 times [2023-01-28 09:29:59,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:59,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116764951] [2023-01-28 09:29:59,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:59,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:29:59,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:59,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116764951] [2023-01-28 09:29:59,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116764951] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:59,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115046824] [2023-01-28 09:29:59,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:29:59,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:59,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:59,435 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:29:59,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 09:29:59,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 09:29:59,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:59,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 09:29:59,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:59,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:59,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115046824] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:59,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:59,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-28 09:29:59,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553093856] [2023-01-28 09:29:59,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:59,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 09:29:59,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:59,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 09:29:59,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-01-28 09:29:59,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 181 [2023-01-28 09:29:59,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 808 transitions, 16694 flow. Second operand has 16 states, 16 states have (on average 79.5625) internal successors, (1273), 16 states have internal predecessors, (1273), 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) [2023-01-28 09:29:59,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:59,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 181 [2023-01-28 09:29:59,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:30:06,468 INFO L130 PetriNetUnfolder]: 16344/24921 cut-off events. [2023-01-28 09:30:06,468 INFO L131 PetriNetUnfolder]: For 621132/621132 co-relation queries the response was YES. [2023-01-28 09:30:06,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222877 conditions, 24921 events. 16344/24921 cut-off events. For 621132/621132 co-relation queries the response was YES. Maximal size of possible extension queue 1062. Compared 168448 event pairs, 1979 based on Foata normal form. 384/25305 useless extension candidates. Maximal degree in co-relation 219924. Up to 7259 conditions per place. [2023-01-28 09:30:06,684 INFO L137 encePairwiseOnDemand]: 173/181 looper letters, 744 selfloop transitions, 870 changer transitions 24/1638 dead transitions. [2023-01-28 09:30:06,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 1638 transitions, 39416 flow [2023-01-28 09:30:06,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-28 09:30:06,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-28 09:30:06,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3424 transitions. [2023-01-28 09:30:06,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47292817679558014 [2023-01-28 09:30:06,688 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3424 transitions. [2023-01-28 09:30:06,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3424 transitions. [2023-01-28 09:30:06,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:30:06,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3424 transitions. [2023-01-28 09:30:06,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 85.6) internal successors, (3424), 40 states have internal predecessors, (3424), 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) [2023-01-28 09:30:06,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 181.0) internal successors, (7421), 41 states have internal predecessors, (7421), 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) [2023-01-28 09:30:06,697 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 181.0) internal successors, (7421), 41 states have internal predecessors, (7421), 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) [2023-01-28 09:30:06,697 INFO L175 Difference]: Start difference. First operand has 218 places, 808 transitions, 16694 flow. Second operand 40 states and 3424 transitions. [2023-01-28 09:30:06,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 1638 transitions, 39416 flow [2023-01-28 09:30:10,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 1638 transitions, 38159 flow, removed 281 selfloop flow, removed 4 redundant places. [2023-01-28 09:30:10,547 INFO L231 Difference]: Finished difference. Result has 277 places, 1239 transitions, 30160 flow [2023-01-28 09:30:10,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=16000, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=801, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=30160, PETRI_PLACES=277, PETRI_TRANSITIONS=1239} [2023-01-28 09:30:10,548 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 248 predicate places. [2023-01-28 09:30:10,548 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 1239 transitions, 30160 flow [2023-01-28 09:30:10,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 79.5625) internal successors, (1273), 16 states have internal predecessors, (1273), 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) [2023-01-28 09:30:10,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:30:10,548 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:30:10,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-28 09:30:10,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-01-28 09:30:10,749 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:30:10,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:30:10,749 INFO L85 PathProgramCache]: Analyzing trace with hash -675327254, now seen corresponding path program 13 times [2023-01-28 09:30:10,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:30:10,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803844420] [2023-01-28 09:30:10,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:30:10,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:30:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:30:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:30:10,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:30:10,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803844420] [2023-01-28 09:30:10,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803844420] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:30:10,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023958433] [2023-01-28 09:30:10,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 09:30:10,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:30:10,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:30:10,895 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:30:10,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 09:30:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:30:10,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 09:30:10,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:30:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:30:10,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:30:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:30:11,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023958433] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:30:11,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:30:11,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 09:30:11,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903200191] [2023-01-28 09:30:11,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:30:11,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 09:30:11,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:30:11,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 09:30:11,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-01-28 09:30:11,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-01-28 09:30:11,056 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 1239 transitions, 30160 flow. Second operand has 15 states, 15 states have (on average 82.26666666666667) internal successors, (1234), 15 states have internal predecessors, (1234), 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) [2023-01-28 09:30:11,056 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:30:11,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-01-28 09:30:11,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:30:19,866 INFO L130 PetriNetUnfolder]: 17362/27169 cut-off events. [2023-01-28 09:30:19,867 INFO L131 PetriNetUnfolder]: For 973421/974450 co-relation queries the response was YES. [2023-01-28 09:30:20,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258734 conditions, 27169 events. 17362/27169 cut-off events. For 973421/974450 co-relation queries the response was YES. Maximal size of possible extension queue 1191. Compared 196745 event pairs, 2900 based on Foata normal form. 954/28070 useless extension candidates. Maximal degree in co-relation 256737. Up to 8079 conditions per place. [2023-01-28 09:30:20,168 INFO L137 encePairwiseOnDemand]: 174/181 looper letters, 942 selfloop transitions, 837 changer transitions 31/1825 dead transitions. [2023-01-28 09:30:20,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 1825 transitions, 44035 flow [2023-01-28 09:30:20,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 09:30:20,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 09:30:20,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1914 transitions. [2023-01-28 09:30:20,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035516969218626 [2023-01-28 09:30:20,170 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1914 transitions. [2023-01-28 09:30:20,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1914 transitions. [2023-01-28 09:30:20,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:30:20,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1914 transitions. [2023-01-28 09:30:20,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 91.14285714285714) internal successors, (1914), 21 states have internal predecessors, (1914), 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) [2023-01-28 09:30:20,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 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) [2023-01-28 09:30:20,175 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 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) [2023-01-28 09:30:20,175 INFO L175 Difference]: Start difference. First operand has 277 places, 1239 transitions, 30160 flow. Second operand 21 states and 1914 transitions. [2023-01-28 09:30:20,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 1825 transitions, 44035 flow [2023-01-28 09:30:25,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 1825 transitions, 39708 flow, removed 1774 selfloop flow, removed 3 redundant places. [2023-01-28 09:30:25,957 INFO L231 Difference]: Finished difference. Result has 301 places, 1314 transitions, 30347 flow [2023-01-28 09:30:25,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=25900, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=723, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=30347, PETRI_PLACES=301, PETRI_TRANSITIONS=1314} [2023-01-28 09:30:25,958 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 272 predicate places. [2023-01-28 09:30:25,958 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 1314 transitions, 30347 flow [2023-01-28 09:30:25,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.26666666666667) internal successors, (1234), 15 states have internal predecessors, (1234), 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) [2023-01-28 09:30:25,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:30:25,958 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:30:25,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 09:30:26,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:30:26,160 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:30:26,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:30:26,160 INFO L85 PathProgramCache]: Analyzing trace with hash 421066253, now seen corresponding path program 14 times [2023-01-28 09:30:26,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:30:26,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616535279] [2023-01-28 09:30:26,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:30:26,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:30:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:30:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:30:26,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:30:26,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616535279] [2023-01-28 09:30:26,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616535279] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:30:26,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316363278] [2023-01-28 09:30:26,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:30:26,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:30:26,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:30:26,265 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:30:26,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 09:30:26,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:30:26,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:30:26,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 09:30:26,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:30:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:30:26,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:30:26,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:30:26,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316363278] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:30:26,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:30:26,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-28 09:30:26,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258907317] [2023-01-28 09:30:26,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:30:26,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 09:30:26,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:30:26,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 09:30:26,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-01-28 09:30:26,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 181 [2023-01-28 09:30:26,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 1314 transitions, 30347 flow. Second operand has 17 states, 17 states have (on average 79.6470588235294) internal successors, (1354), 17 states have internal predecessors, (1354), 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) [2023-01-28 09:30:26,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:30:26,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 181 [2023-01-28 09:30:26,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:30:39,588 INFO L130 PetriNetUnfolder]: 20220/32024 cut-off events. [2023-01-28 09:30:39,589 INFO L131 PetriNetUnfolder]: For 1011905/1011905 co-relation queries the response was YES. [2023-01-28 09:30:39,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311955 conditions, 32024 events. 20220/32024 cut-off events. For 1011905/1011905 co-relation queries the response was YES. Maximal size of possible extension queue 1400. Compared 241242 event pairs, 1279 based on Foata normal form. 904/32928 useless extension candidates. Maximal degree in co-relation 310180. Up to 9943 conditions per place. [2023-01-28 09:30:39,993 INFO L137 encePairwiseOnDemand]: 172/181 looper letters, 1617 selfloop transitions, 1264 changer transitions 50/2931 dead transitions. [2023-01-28 09:30:39,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 2931 transitions, 72409 flow [2023-01-28 09:30:39,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-01-28 09:30:39,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2023-01-28 09:30:39,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 8993 transitions. [2023-01-28 09:30:40,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46434656890587084 [2023-01-28 09:30:40,000 INFO L72 ComplementDD]: Start complementDD. Operand 107 states and 8993 transitions. [2023-01-28 09:30:40,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 8993 transitions. [2023-01-28 09:30:40,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:30:40,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 107 states and 8993 transitions. [2023-01-28 09:30:40,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 108 states, 107 states have (on average 84.04672897196262) internal successors, (8993), 107 states have internal predecessors, (8993), 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) [2023-01-28 09:30:40,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 108 states, 108 states have (on average 181.0) internal successors, (19548), 108 states have internal predecessors, (19548), 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) [2023-01-28 09:30:40,026 INFO L81 ComplementDD]: Finished complementDD. Result has 108 states, 108 states have (on average 181.0) internal successors, (19548), 108 states have internal predecessors, (19548), 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) [2023-01-28 09:30:40,026 INFO L175 Difference]: Start difference. First operand has 301 places, 1314 transitions, 30347 flow. Second operand 107 states and 8993 transitions. [2023-01-28 09:30:40,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 2931 transitions, 72409 flow [2023-01-28 09:30:48,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 2931 transitions, 69443 flow, removed 955 selfloop flow, removed 8 redundant places. [2023-01-28 09:30:48,709 INFO L231 Difference]: Finished difference. Result has 457 places, 1751 transitions, 45382 flow [2023-01-28 09:30:48,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=28313, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=832, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=107, PETRI_FLOW=45382, PETRI_PLACES=457, PETRI_TRANSITIONS=1751} [2023-01-28 09:30:48,710 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 428 predicate places. [2023-01-28 09:30:48,711 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1751 transitions, 45382 flow [2023-01-28 09:30:48,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 79.6470588235294) internal successors, (1354), 17 states have internal predecessors, (1354), 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) [2023-01-28 09:30:48,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:30:48,711 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:30:48,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 09:30:48,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:30:48,911 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:30:48,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:30:48,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1130474012, now seen corresponding path program 15 times [2023-01-28 09:30:48,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:30:48,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206976667] [2023-01-28 09:30:48,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:30:48,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:30:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:30:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:30:48,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:30:48,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206976667] [2023-01-28 09:30:48,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206976667] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:30:48,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536715848] [2023-01-28 09:30:48,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:30:48,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:30:48,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:30:48,993 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:30:48,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 09:30:49,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 09:30:49,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:30:49,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 09:30:49,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:30:49,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:30:49,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:30:49,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:30:49,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536715848] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:30:49,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:30:49,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-01-28 09:30:49,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721413081] [2023-01-28 09:30:49,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:30:49,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 09:30:49,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:30:49,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 09:30:49,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-01-28 09:30:49,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 181 [2023-01-28 09:30:49,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1751 transitions, 45382 flow. Second operand has 14 states, 14 states have (on average 80.35714285714286) internal successors, (1125), 14 states have internal predecessors, (1125), 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) [2023-01-28 09:30:49,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:30:49,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 181 [2023-01-28 09:30:49,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:31:05,297 INFO L130 PetriNetUnfolder]: 22490/35283 cut-off events. [2023-01-28 09:31:05,297 INFO L131 PetriNetUnfolder]: For 1898312/1898312 co-relation queries the response was YES. [2023-01-28 09:31:05,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413375 conditions, 35283 events. 22490/35283 cut-off events. For 1898312/1898312 co-relation queries the response was YES. Maximal size of possible extension queue 1597. Compared 264287 event pairs, 4018 based on Foata normal form. 448/35731 useless extension candidates. Maximal degree in co-relation 411626. Up to 12065 conditions per place. [2023-01-28 09:31:05,925 INFO L137 encePairwiseOnDemand]: 173/181 looper letters, 1269 selfloop transitions, 1128 changer transitions 10/2407 dead transitions. [2023-01-28 09:31:05,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 2407 transitions, 68462 flow [2023-01-28 09:31:05,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 09:31:05,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 09:31:05,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2106 transitions. [2023-01-28 09:31:05,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48480662983425415 [2023-01-28 09:31:05,927 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2106 transitions. [2023-01-28 09:31:05,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2106 transitions. [2023-01-28 09:31:05,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:31:05,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2106 transitions. [2023-01-28 09:31:05,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 87.75) internal successors, (2106), 24 states have internal predecessors, (2106), 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) [2023-01-28 09:31:05,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 181.0) internal successors, (4525), 25 states have internal predecessors, (4525), 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) [2023-01-28 09:31:05,932 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 181.0) internal successors, (4525), 25 states have internal predecessors, (4525), 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) [2023-01-28 09:31:05,932 INFO L175 Difference]: Start difference. First operand has 457 places, 1751 transitions, 45382 flow. Second operand 24 states and 2106 transitions. [2023-01-28 09:31:05,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 2407 transitions, 68462 flow [2023-01-28 09:31:27,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 2407 transitions, 58728 flow, removed 4124 selfloop flow, removed 16 redundant places. [2023-01-28 09:31:27,732 INFO L231 Difference]: Finished difference. Result has 477 places, 1949 transitions, 47880 flow [2023-01-28 09:31:27,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=38967, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=935, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=757, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=47880, PETRI_PLACES=477, PETRI_TRANSITIONS=1949} [2023-01-28 09:31:27,733 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 448 predicate places. [2023-01-28 09:31:27,733 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 1949 transitions, 47880 flow [2023-01-28 09:31:27,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 80.35714285714286) internal successors, (1125), 14 states have internal predecessors, (1125), 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) [2023-01-28 09:31:27,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:31:27,734 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:31:27,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-01-28 09:31:27,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-28 09:31:27,938 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:31:27,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:31:27,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1061750104, now seen corresponding path program 16 times [2023-01-28 09:31:27,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:31:27,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746909443] [2023-01-28 09:31:27,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:31:27,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:31:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:31:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:31:28,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:31:28,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746909443] [2023-01-28 09:31:28,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746909443] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:31:28,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817685864] [2023-01-28 09:31:28,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:31:28,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:31:28,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:31:28,018 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:31:28,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 09:31:28,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:31:28,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:31:28,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 09:31:28,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:31:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:31:28,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:31:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:31:28,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817685864] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:31:28,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:31:28,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-01-28 09:31:28,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822197641] [2023-01-28 09:31:28,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:31:28,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 09:31:28,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:31:28,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 09:31:28,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-01-28 09:31:28,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-01-28 09:31:28,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 1949 transitions, 47880 flow. Second operand has 15 states, 15 states have (on average 82.4) internal successors, (1236), 15 states have internal predecessors, (1236), 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) [2023-01-28 09:31:28,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:31:28,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-01-28 09:31:28,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:31:49,718 INFO L130 PetriNetUnfolder]: 27906/43562 cut-off events. [2023-01-28 09:31:49,718 INFO L131 PetriNetUnfolder]: For 2834220/2835265 co-relation queries the response was YES. [2023-01-28 09:31:50,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505351 conditions, 43562 events. 27906/43562 cut-off events. For 2834220/2835265 co-relation queries the response was YES. Maximal size of possible extension queue 2022. Compared 334716 event pairs, 4339 based on Foata normal form. 871/44253 useless extension candidates. Maximal degree in co-relation 502266. Up to 15937 conditions per place. [2023-01-28 09:31:50,791 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 1222 selfloop transitions, 1536 changer transitions 10/2793 dead transitions. [2023-01-28 09:31:50,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 2793 transitions, 73383 flow [2023-01-28 09:31:50,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 09:31:50,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 09:31:50,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1911 transitions. [2023-01-28 09:31:50,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027624309392266 [2023-01-28 09:31:50,794 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1911 transitions. [2023-01-28 09:31:50,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1911 transitions. [2023-01-28 09:31:50,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:31:50,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1911 transitions. [2023-01-28 09:31:50,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 91.0) internal successors, (1911), 21 states have internal predecessors, (1911), 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) [2023-01-28 09:31:50,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 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) [2023-01-28 09:31:50,797 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 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) [2023-01-28 09:31:50,797 INFO L175 Difference]: Start difference. First operand has 477 places, 1949 transitions, 47880 flow. Second operand 21 states and 1911 transitions. [2023-01-28 09:31:50,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 2793 transitions, 73383 flow [2023-01-28 09:32:18,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 2793 transitions, 70522 flow, removed 1040 selfloop flow, removed 2 redundant places. [2023-01-28 09:32:18,353 INFO L231 Difference]: Finished difference. Result has 501 places, 2275 transitions, 60052 flow [2023-01-28 09:32:18,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=45422, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1945, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=60052, PETRI_PLACES=501, PETRI_TRANSITIONS=2275} [2023-01-28 09:32:18,355 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 472 predicate places. [2023-01-28 09:32:18,355 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 2275 transitions, 60052 flow [2023-01-28 09:32:18,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.4) internal successors, (1236), 15 states have internal predecessors, (1236), 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) [2023-01-28 09:32:18,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:32:18,355 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:32:18,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-28 09:32:18,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-28 09:32:18,560 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:32:18,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:32:18,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1702446798, now seen corresponding path program 17 times [2023-01-28 09:32:18,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:32:18,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184357518] [2023-01-28 09:32:18,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:32:18,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:32:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:32:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:32:18,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:32:18,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184357518] [2023-01-28 09:32:18,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184357518] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:32:18,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306651037] [2023-01-28 09:32:18,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:32:18,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:32:18,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:32:18,653 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:32:18,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 09:32:18,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 09:32:18,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:32:18,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 09:32:18,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:32:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:32:18,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:32:18,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:32:18,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306651037] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:32:18,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:32:18,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-01-28 09:32:18,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878683840] [2023-01-28 09:32:18,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:32:18,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 09:32:18,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:32:18,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 09:32:18,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-01-28 09:32:18,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-01-28 09:32:18,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 2275 transitions, 60052 flow. Second operand has 14 states, 14 states have (on average 82.42857142857143) internal successors, (1154), 14 states have internal predecessors, (1154), 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) [2023-01-28 09:32:18,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:32:18,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-01-28 09:32:18,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:32:51,852 INFO L130 PetriNetUnfolder]: 36739/58795 cut-off events. [2023-01-28 09:32:51,852 INFO L131 PetriNetUnfolder]: For 3812895/3814653 co-relation queries the response was YES. [2023-01-28 09:32:53,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684475 conditions, 58795 events. 36739/58795 cut-off events. For 3812895/3814653 co-relation queries the response was YES. Maximal size of possible extension queue 2778. Compared 492327 event pairs, 7925 based on Foata normal form. 1620/60211 useless extension candidates. Maximal degree in co-relation 682787. Up to 25301 conditions per place. [2023-01-28 09:32:53,860 INFO L137 encePairwiseOnDemand]: 174/181 looper letters, 2409 selfloop transitions, 1221 changer transitions 83/3738 dead transitions. [2023-01-28 09:32:53,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 3738 transitions, 99381 flow [2023-01-28 09:32:53,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 09:32:53,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 09:32:53,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2068 transitions. [2023-01-28 09:32:53,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967571462887341 [2023-01-28 09:32:53,862 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2068 transitions. [2023-01-28 09:32:53,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2068 transitions. [2023-01-28 09:32:53,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:32:53,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2068 transitions. [2023-01-28 09:32:53,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 89.91304347826087) internal successors, (2068), 23 states have internal predecessors, (2068), 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) [2023-01-28 09:32:53,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 181.0) internal successors, (4344), 24 states have internal predecessors, (4344), 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) [2023-01-28 09:32:53,867 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 181.0) internal successors, (4344), 24 states have internal predecessors, (4344), 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) [2023-01-28 09:32:53,867 INFO L175 Difference]: Start difference. First operand has 501 places, 2275 transitions, 60052 flow. Second operand 23 states and 2068 transitions. [2023-01-28 09:32:53,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 3738 transitions, 99381 flow [2023-01-28 09:33:40,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 3738 transitions, 95826 flow, removed 773 selfloop flow, removed 6 redundant places. [2023-01-28 09:33:40,164 INFO L231 Difference]: Finished difference. Result has 531 places, 2844 transitions, 77170 flow [2023-01-28 09:33:40,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=57051, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=772, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=77170, PETRI_PLACES=531, PETRI_TRANSITIONS=2844} [2023-01-28 09:33:40,166 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 502 predicate places. [2023-01-28 09:33:40,166 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 2844 transitions, 77170 flow [2023-01-28 09:33:40,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 82.42857142857143) internal successors, (1154), 14 states have internal predecessors, (1154), 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) [2023-01-28 09:33:40,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:33:40,166 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:33:40,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-28 09:33:40,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-28 09:33:40,373 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:33:40,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:33:40,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1866322504, now seen corresponding path program 18 times [2023-01-28 09:33:40,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:33:40,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792165114] [2023-01-28 09:33:40,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:33:40,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:33:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:33:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:33:40,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:33:40,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792165114] [2023-01-28 09:33:40,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792165114] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:33:40,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142395634] [2023-01-28 09:33:40,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:33:40,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:33:40,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:33:40,456 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:33:40,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 09:33:40,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 09:33:40,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:33:40,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 09:33:40,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:33:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:33:40,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:33:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:33:40,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142395634] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:33:40,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:33:40,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-01-28 09:33:40,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898952413] [2023-01-28 09:33:40,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:33:40,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 09:33:40,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:33:40,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 09:33:40,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-01-28 09:33:40,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-01-28 09:33:40,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 2844 transitions, 77170 flow. Second operand has 15 states, 15 states have (on average 82.8) internal successors, (1242), 15 states have internal predecessors, (1242), 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) [2023-01-28 09:33:40,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:33:40,631 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-01-28 09:33:40,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:34:43,713 INFO L130 PetriNetUnfolder]: 56508/91382 cut-off events. [2023-01-28 09:34:43,714 INFO L131 PetriNetUnfolder]: For 6643618/6644083 co-relation queries the response was YES. [2023-01-28 09:34:46,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1128416 conditions, 91382 events. 56508/91382 cut-off events. For 6643618/6644083 co-relation queries the response was YES. Maximal size of possible extension queue 4375. Compared 818134 event pairs, 8552 based on Foata normal form. 2337/93600 useless extension candidates. Maximal degree in co-relation 1126717. Up to 31473 conditions per place. [2023-01-28 09:34:47,151 INFO L137 encePairwiseOnDemand]: 175/181 looper letters, 2344 selfloop transitions, 1760 changer transitions 15/4172 dead transitions. [2023-01-28 09:34:47,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 4172 transitions, 124408 flow [2023-01-28 09:34:47,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 09:34:47,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 09:34:47,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1911 transitions. [2023-01-28 09:34:47,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027624309392266 [2023-01-28 09:34:47,153 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1911 transitions. [2023-01-28 09:34:47,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1911 transitions. [2023-01-28 09:34:47,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:34:47,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1911 transitions. [2023-01-28 09:34:47,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 91.0) internal successors, (1911), 21 states have internal predecessors, (1911), 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) [2023-01-28 09:34:47,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 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) [2023-01-28 09:34:47,157 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 181.0) internal successors, (3982), 22 states have internal predecessors, (3982), 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) [2023-01-28 09:34:47,157 INFO L175 Difference]: Start difference. First operand has 531 places, 2844 transitions, 77170 flow. Second operand 21 states and 1911 transitions. [2023-01-28 09:34:47,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 4172 transitions, 124408 flow [2023-01-28 09:37:00,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 4172 transitions, 119034 flow, removed 2361 selfloop flow, removed 4 redundant places. [2023-01-28 09:37:00,942 INFO L231 Difference]: Finished difference. Result has 555 places, 3245 transitions, 90846 flow [2023-01-28 09:37:00,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=74906, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=90846, PETRI_PLACES=555, PETRI_TRANSITIONS=3245} [2023-01-28 09:37:00,944 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 526 predicate places. [2023-01-28 09:37:00,944 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 3245 transitions, 90846 flow [2023-01-28 09:37:00,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.8) internal successors, (1242), 15 states have internal predecessors, (1242), 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) [2023-01-28 09:37:00,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:37:00,945 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:37:00,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-28 09:37:01,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-28 09:37:01,146 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:37:01,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:37:01,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1400967236, now seen corresponding path program 19 times [2023-01-28 09:37:01,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:37:01,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295861920] [2023-01-28 09:37:01,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:37:01,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:37:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:37:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:37:01,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:37:01,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295861920] [2023-01-28 09:37:01,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295861920] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:37:01,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634826120] [2023-01-28 09:37:01,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 09:37:01,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:37:01,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:37:01,241 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:37:01,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 09:37:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:37:01,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 09:37:01,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:37:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:37:01,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:37:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:37:01,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634826120] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:37:01,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:37:01,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-01-28 09:37:01,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552687271] [2023-01-28 09:37:01,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:37:01,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 09:37:01,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:37:01,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 09:37:01,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-01-28 09:37:01,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 181 [2023-01-28 09:37:01,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 3245 transitions, 90846 flow. Second operand has 16 states, 16 states have (on average 79.5625) internal successors, (1273), 16 states have internal predecessors, (1273), 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) [2023-01-28 09:37:01,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:37:01,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 181 [2023-01-28 09:37:01,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:38:35,029 INFO L130 PetriNetUnfolder]: 70083/114413 cut-off events. [2023-01-28 09:38:35,029 INFO L131 PetriNetUnfolder]: For 9409478/9409478 co-relation queries the response was YES. [2023-01-28 09:38:38,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464709 conditions, 114413 events. 70083/114413 cut-off events. For 9409478/9409478 co-relation queries the response was YES. Maximal size of possible extension queue 5612. Compared 1078895 event pairs, 6761 based on Foata normal form. 814/115227 useless extension candidates. Maximal degree in co-relation 1462812. Up to 40233 conditions per place. [2023-01-28 09:38:39,618 INFO L137 encePairwiseOnDemand]: 172/181 looper letters, 2983 selfloop transitions, 2617 changer transitions 54/5654 dead transitions. [2023-01-28 09:38:39,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 5654 transitions, 168291 flow [2023-01-28 09:38:39,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-01-28 09:38:39,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-01-28 09:38:39,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3343 transitions. [2023-01-28 09:38:39,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735798271709874 [2023-01-28 09:38:39,621 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3343 transitions. [2023-01-28 09:38:39,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3343 transitions. [2023-01-28 09:38:39,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:38:39,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3343 transitions. [2023-01-28 09:38:39,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 85.71794871794872) internal successors, (3343), 39 states have internal predecessors, (3343), 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) [2023-01-28 09:38:39,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 181.0) internal successors, (7240), 40 states have internal predecessors, (7240), 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) [2023-01-28 09:38:39,628 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 181.0) internal successors, (7240), 40 states have internal predecessors, (7240), 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) [2023-01-28 09:38:39,628 INFO L175 Difference]: Start difference. First operand has 555 places, 3245 transitions, 90846 flow. Second operand 39 states and 3343 transitions. [2023-01-28 09:38:39,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 5654 transitions, 168291 flow [2023-01-28 09:41:18,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 5654 transitions, 163781 flow, removed 1315 selfloop flow, removed 4 redundant places. [2023-01-28 09:41:18,397 INFO L231 Difference]: Finished difference. Result has 610 places, 4265 transitions, 130156 flow [2023-01-28 09:41:18,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=181, PETRI_DIFFERENCE_MINUEND_FLOW=88148, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1738, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=130156, PETRI_PLACES=610, PETRI_TRANSITIONS=4265} [2023-01-28 09:41:18,399 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 581 predicate places. [2023-01-28 09:41:18,399 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 4265 transitions, 130156 flow [2023-01-28 09:41:18,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 79.5625) internal successors, (1273), 16 states have internal predecessors, (1273), 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) [2023-01-28 09:41:18,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:41:18,400 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:41:18,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-01-28 09:41:18,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:41:18,604 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 09:41:18,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:41:18,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1116183444, now seen corresponding path program 20 times [2023-01-28 09:41:18,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:41:18,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546022351] [2023-01-28 09:41:18,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:41:18,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:41:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:41:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:41:18,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:41:18,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546022351] [2023-01-28 09:41:18,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546022351] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:41:18,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242229472] [2023-01-28 09:41:18,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:41:18,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:41:18,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:41:18,673 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:41:18,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 09:41:18,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:41:18,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:41:18,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 09:41:18,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:41:18,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:41:18,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:41:18,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:41:18,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242229472] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:41:18,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:41:18,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-01-28 09:41:18,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500973512] [2023-01-28 09:41:18,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:41:18,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 09:41:18,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:41:18,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 09:41:18,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-01-28 09:41:18,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 181 [2023-01-28 09:41:18,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 4265 transitions, 130156 flow. Second operand has 15 states, 15 states have (on average 82.26666666666667) internal successors, (1234), 15 states have internal predecessors, (1234), 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) [2023-01-28 09:41:18,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:41:18,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 181 [2023-01-28 09:41:18,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-01-28 09:42:45,826 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 [2023-01-28 09:42:45,826 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 09:42:46,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-01-28 09:42:46,839 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 [2023-01-28 09:42:49,289 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-01-28 09:42:49,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-01-28 09:42:49,289 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-01-28 09:42:49,290 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-01-28 09:42:49,290 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-01-28 09:42:49,290 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-01-28 09:42:49,291 INFO L445 BasicCegarLoop]: Path program histogram: [20, 4, 3, 2, 1, 1] [2023-01-28 09:42:49,292 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 09:42:49,292 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 09:42:49,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 09:42:49 BasicIcfg [2023-01-28 09:42:49,294 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 09:42:49,294 INFO L158 Benchmark]: Toolchain (without parser) took 804701.35ms. Allocated memory was 323.0MB in the beginning and 13.5GB in the end (delta: 13.2GB). Free memory was 282.0MB in the beginning and 9.2GB in the end (delta: -8.9GB). Peak memory consumption was 9.4GB. Max. memory is 16.0GB. [2023-01-28 09:42:49,294 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 255.9MB. Free memory was 213.6MB in the beginning and 213.4MB in the end (delta: 167.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 09:42:49,295 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.01ms. Allocated memory is still 323.0MB. Free memory was 282.0MB in the beginning and 270.8MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 09:42:49,295 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.44ms. Allocated memory is still 323.0MB. Free memory was 270.8MB in the beginning and 269.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 09:42:49,295 INFO L158 Benchmark]: Boogie Preprocessor took 22.98ms. Allocated memory is still 323.0MB. Free memory was 269.4MB in the beginning and 268.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 09:42:49,295 INFO L158 Benchmark]: RCFGBuilder took 371.09ms. Allocated memory is still 323.0MB. Free memory was 268.0MB in the beginning and 253.2MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-01-28 09:42:49,295 INFO L158 Benchmark]: TraceAbstraction took 804089.18ms. Allocated memory was 323.0MB in the beginning and 13.5GB in the end (delta: 13.2GB). Free memory was 252.3MB in the beginning and 9.2GB in the end (delta: -9.0GB). Peak memory consumption was 9.3GB. Max. memory is 16.0GB. [2023-01-28 09:42:49,296 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 255.9MB. Free memory was 213.6MB in the beginning and 213.4MB in the end (delta: 167.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 187.01ms. Allocated memory is still 323.0MB. Free memory was 282.0MB in the beginning and 270.8MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 27.44ms. Allocated memory is still 323.0MB. Free memory was 270.8MB in the beginning and 269.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 22.98ms. Allocated memory is still 323.0MB. Free memory was 269.4MB in the beginning and 268.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 371.09ms. Allocated memory is still 323.0MB. Free memory was 268.0MB in the beginning and 253.2MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 804089.18ms. Allocated memory was 323.0MB in the beginning and 13.5GB in the end (delta: 13.2GB). Free memory was 252.3MB in the beginning and 9.2GB in the end (delta: -9.0GB). Peak memory consumption was 9.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 95 PlacesBefore, 29 PlacesAfterwards, 92 TransitionsBefore, 22 TransitionsAfterwards, 1320 CoEnabledTransitionPairs, 6 FixpointIterations, 36 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 76 TotalNumberOfCompositions, 1312 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1312, independent: 1312, independent conditional: 0, independent unconditional: 1312, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 696, independent: 696, independent conditional: 0, independent unconditional: 696, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1312, independent: 616, independent conditional: 0, independent unconditional: 616, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 696, unknown conditional: 0, unknown unconditional: 696] , Statistics on independence cache: Total cache size (in pairs): 48, Positive cache size: 48, Positive conditional cache size: 0, Positive unconditional cache size: 48, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 129 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 804.0s, OverallIterations: 31, TraceHistogramMax: 2, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 789.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3931 SdHoareTripleChecker+Valid, 7.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3931 mSDsluCounter, 722 SdHoareTripleChecker+Invalid, 6.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 559 mSDsCounter, 237 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14550 IncrementalHoareTripleChecker+Invalid, 14787 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 237 mSolverCounterUnsat, 163 mSDtfsCounter, 14550 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1616 GetRequests, 1035 SyntacticMatches, 34 SemanticMatches, 547 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7210 ImplicationChecksByTransitivity, 6.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130156occurred in iteration=30, InterpolantAutomatonStates: 468, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 5.9s InterpolantComputationTime, 1149 NumberOfCodeBlocks, 1149 NumberOfCodeBlocksAsserted, 73 NumberOfCheckSat, 1551 ConstructedInterpolants, 0 QuantifiedInterpolants, 10673 SizeOfPredicates, 49 NumberOfNonLiveVariables, 3614 ConjunctsInSsa, 248 ConjunctsInUnsatCore, 73 InterpolantComputations, 10 PerfectInterpolantSequences, 111/279 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown